Name: imaging intranuclear actin rods in live heat stressed drosophila embryos
Uploaded: 2020-05-15T14:30:00.000+00:00
Duration: 7 min 57 s
Description: Watch this Scientific Journal Video about Imaging Intranuclear Actin Rods in Live Heat Stressed Drosophila Embryos at JoVE.com

著者らは、ソカック研究所でこの技術のパイオニアを助けたリリウ・ジェンとゼングイ・シューと、分析を支援したハサン・シーデの作品を感謝して認めている。この研究のための仕事はNIHからの助成金によって資金を提供される(R01 GM115111)。

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	<li>Figard, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cofilin-mediated+Actin+Stress+Response+is+maladaptive+in+heat-stressed+embryos.">Cofilin-mediated Actin Stress Response is maladaptive in heat-stressed embryos.</a> Cell Reports. 26 (49), 3493-3501 (2019).</li><li>Ashworth, S. L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=ADF/cofilin+mediates+actin+cytoskeletal+alterations+in+LLC-PK+cells+during+ATP+depletion.">ADF/cofilin mediates actin cytoskeletal alterations in LLC-PK cells during ATP depletion.</a> American Journal of Physiology Renal Physiology. 284 (4), 852-862 (2003).</li><li>Vandebrouck, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vitro+analysis+of+rod+composition+and+actin+dynamics+in+inherited+myopathies.">In vitro analysis of rod composition and actin dynamics in inherited myopathies.</a> Journal of Neuropathology and Experimental Neurology. 69 (5), 429-441 (2010).</li><li>Minamide, L. S., Striegl, A. M., Boyle, J. A., Meberg, P. J., Bamburg, J. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neurodegenerative+stimuli+induce+persistent+ADF/cofilin-actin+rods+that+disrupt+distal+neurite+function.">Neurodegenerative stimuli induce persistent ADF/cofilin-actin rods that disrupt distal neurite function.</a> Nature Cell Biology. 2 (9), 628-636 (2000).</li><li>Bamburg, J. R., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=ADF/Cofilin-actin+rods+in+neurodegenerative+diseases.">ADF/Cofilin-actin rods in neurodegenerative diseases.</a> Current Alzheimer Research. 7 (3), 241-250 (2010).</li><li>Bamburg, J. R., Bernstein, B. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Actin+dynamics+and+cofilin-actin+rods+in+alzheimer+disease.">Actin dynamics and cofilin-actin rods in alzheimer disease.</a> Cytoskeleton. 73 (9), 477-497 (2016).</li><li>Bernstein, B. W., Chen, H., Boyle, J. A., Bamburg, J. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Formation+of+actin-ADF/cofilin+rods+transiently+retards+decline+of+mitochondrial+potential+and+ATP+in+stressed+neurons.">Formation of actin-ADF/cofilin rods transiently retards decline of mitochondrial potential and ATP in stressed neurons.</a> AJP: Cell Physiology. 291 (5), 828-839 (2006).</li><li>Munsie, L. N., Desmond, C. R., Truant, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cofilin+nuclear-cytoplasmic+shuttling+affects+cofilin-actin+rod+formation+during+stress.">Cofilin nuclear-cytoplasmic shuttling affects cofilin-actin rod formation during stress.</a> Journal of Cell Science. 125 (17), 3977-3988 (2012).</li><li>Iida, K., Iida, H., Yahara, I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Heat+shock+induction+of+intranuclear+actin+rods+in+cultured+mammalian+cells.">Heat shock induction of intranuclear actin rods in cultured mammalian cells.</a> Experimental Cell Research. 165, 207-215 (1986).</li><li>Ohta, Y., Nishida, E., Sakai, H., Miyamoto, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dephosphorylation+of+cofilin+accompanies+heat+shock-induced+nuclear+accumulation+of+cofilin.">Dephosphorylation of cofilin accompanies heat shock-induced nuclear accumulation of cofilin.</a> Journal of Biological Chemistry. 264 (27), 16143-16148 (1989).</li><li>Iida, K., Matsumoto, S., Yahara, I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+KKRKK+sequence+is+involved+in+heat+shock-induced+nuclear+translocation+of+the+18-kDa+actin-binding+protein,+cofilin.">The KKRKK sequence is involved in heat shock-induced nuclear translocation of the 18-kDa actin-binding protein, cofilin.</a> Cell Structure and Function. 17 (1), 39-46 (1992).</li><li>Minamide, L. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Isolation+and+characterization+of+cytoplasmic+cofilin-actin+rods.">Isolation and characterization of cytoplasmic cofilin-actin rods.</a> Journal of Biological Chemistry. 285 (8), 5450-5460 (2010).</li><li>Masurovsky, E. B., Benitez, H. H., Kim, S. U., Murray, M. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Origin,+development,+and+nature+of+intranuclear+rodlets+and+associated+bodies+in+chicken+sympathetic+neurons.">Origin, development, and nature of intranuclear rodlets and associated bodies in chicken sympathetic neurons.</a> The Journal of Cell Biology. 44 (7), 172-191 (1970).</li><li>Feldman, M. L., Peters, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Intranuclear+rods+and+sheets+in+rat+cochlear+nucleus.">Intranuclear rods and sheets in rat cochlear nucleus.</a> Journal of Neurocytology. 1 (2), 109-127 (1972).</li><li>Nishida, E., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cofilin+is+a+component+of+intranuclear+and+cytoplasmic+actin+rods+induced+in+cultured+cells.">Cofilin is a component of intranuclear and cytoplasmic actin rods induced in cultured cells.</a> Cell Biology. 84 (8), 5262-5266 (1987).</li><li>Ono, S., Abe, H., Nagaoka, R., Obinata, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Colocalization+of+ADF+and+cofilin+in+intranuclear+actin+rods+of+cultured+muscle+cells.">Colocalization of ADF and cofilin in intranuclear actin rods of cultured muscle cells.</a> Journal of Muscle Research and Cell Motility. 14 (2), 195-204 (1993).</li><li>Xue, Z., Sokac, A. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Back-to-back+mechanisms+drive+actomyosin+ring+closure+during+Drosophila+embryo+cleavage.">Back-to-back mechanisms drive actomyosin ring closure during Drosophila embryo cleavage.</a> The Journal of Cell Biology. 215 (3), 335-344 (2016).</li><li>Cao, J., Albertson, R., Riggs, B., Field, C. M., Sullivan, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Nuf,+a+Rab11+effector,+maintains+cytokinetic+furrow+integrity+by+promoting+local+actin+polymerization.">Nuf, a Rab11 effector, maintains cytokinetic furrow integrity by promoting local actin polymerization.</a> Journal of Cell Biology. 182 (2), 301-313 (2008).</li><li>Spracklen, A. J., Fagan, T. N., Lovander, K. E., Tootle, T. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+pros+and+cons+of+common+actin+labeling+tools+for+visualizing+actin+dynamics+during+Drosophila+oogenesis.">The pros and cons of common actin labeling tools for visualizing actin dynamics during Drosophila oogenesis.</a> Developmental Biology. 393 (2), 209-226 (2014).</li><li>Chen, Q., Nag, S., Pollard, T. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Formins+filter+modified+actin+subunits+during+processive+elongation.">Formins filter modified actin subunits during processive elongation.</a> Journal of Structural Biology. 177 (1), 32-39 (2012).</li><li>Iordanou, E., Chandran, R. R., Blackstone, N., Jiang, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=RNAi+interference+by+dsRNA+injection+into+Drosophila+embryos.">RNAi interference by dsRNA injection into Drosophila embryos.</a> Journal of Visualized Experiments. (50), 2477 (2011).</li><li>Juarez, M. T., Patterson, R. A., Li, W., McGinnis, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microinjection+wound+assay+and+in+vivo+localization+of+epidermal+wound+response+reporters+in+Drosophila+embryos.">Microinjection wound assay and in vivo localization of epidermal wound response reporters in Drosophila embryos.</a> Journal of Visualized Experiments. 81, 50750 (2013).</li><li>Carreira-Rosario, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Recombineering+homologous+recombination+constructs+in+Drosophila.">Recombineering homologous recombination constructs in Drosophila.</a> Journal of Visualized Experiments. (77), 50346 (2013).</li><li>Brust-Mascher, I., Scholey, J. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microinjection+techniques+for+studying+mitosis+in+the+Drosophila+melanogaster+syncytial+embryo.">Microinjection techniques for studying mitosis in the Drosophila melanogaster syncytial embryo.</a> Journal of Visualized Experiments. (31), 1382 (2009).</li><li>Catrina, I. E., Bayer, L. V., Omar, O. S., Bratu, D. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Visualizing+and+tracking+endogenous+mRNAs+in+live+Drosophila+melanogaster+egg+chambers.">Visualizing and tracking endogenous mRNAs in live Drosophila melanogaster egg chambers.</a> Journal of Visualized Experiments. (148), 58545 (2019).</li><li>Wessel, A. D., Gumalla, M., Grosshans, J., Schmidt, C. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+mechanical+properties+of+early+Drosophila+embryos+measured+by+high-speed+video+microrheology.">The mechanical properties of early Drosophila embryos measured by high-speed video microrheology.</a> Biophysical Journal. 108 (8), 1899-1907 (2015).</li><li>Mollinari, C., Gonz&#225;lez, A., Cid-Arregui, A., Garc&#237;a-Carranc&#225;, <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microinjection+and+transgenesis.">Microinjection and transgenesis.</a> Microinjection and Transgenesis: Strategies and Protocols. , 587-603 (1998).</li><li>Figard, L., Sokac, A. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Imaging+cell+shape+change+in+living+Drosophila+embryos.">Imaging cell shape change in living Drosophila embryos.</a> Journal of Visualized Experiments. (49), 2503 (2011).</li><li>Oesterle, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Pipette Cookbook 2018: P-97 and P-1000 Micropipette Pullers. , (2018).</li><li>Bownes, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+photographic+study+of+development+in+the+living+embryo+of+Drosophila+melanogaster.">A photographic study of development in the living embryo of Drosophila melanogaster.</a> Journal of Embryology and Experimental Morphology. 33 (3), 789-801 (1975).</li><li>Powsner, L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+effects+of+temperature+on+the+durations+of+the+developmental+stages+of+Drosophila+melanogaster.">The effects of temperature on the durations of the developmental stages of Drosophila melanogaster.</a> Physiological Zoology. 8 (4), 474-520 (1935).</li><li>Hunter, M. V., Willoughby, P. M., Bruce, A. E. E., Fernandez-Gonzalez, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Oxidative+Stress+Orchestrates+Cell+Polarity+to+Promote+Embryonic+Wound+Healing.">Oxidative Stress Orchestrates Cell Polarity to Promote Embryonic Wound Healing.</a> Developmental Cell. 47 (3), 377-387 (2018).</li></ol>

利益相反は宣言されていません。

この方法の意義は、ショウジョウバエ胚21、22、23、24、25、26、27におけるマイクロインジェクションの確立されたプロトコルを利用して、ASRおよび付随するアクチンロッドアセンブリに関する新しい研究を可能にすることです。<s...

このプロトコルは、誘導アクチンストレス応答(ASR)1を受けている熱ストレス胚における核内アクチン棒の集合体を可視化するためにG-アクチンレッドを注入する方法を説明する。我々は、胚において形態形成の破壊および生存率の低下をもたらすASRの研究を支援するためにこのプロトコルを開発し、成人のヒト細胞型は腎不全2、筋筋筋症3、アルツハイマー病およびハンチントン病4、5、6、7、8を含む病理に関連している。このASRは、ヒートショック9、10、11、酸化ストレス4、6、および異常ハンチンチンまたはβアミロイドオリゴマー化4、5、6、7、9、13、14、15、16を含む多数の細胞ストレスによって誘発される。ASRの特徴は、アクチン相互作用タンパク質のストレス誘発過活性化によって駆動される細胞質または影響を受ける細胞の核のいずれかに異常なアクチン棒の組み立てであり、Cofilin1、5、6、10。残念ながら、ASRに関する重要な知識のギャップは残っています。例えば、アクチン棒の機能は知られていない。私たちは、いくつかの細胞型の細胞質にロッドが形成される理由を理解していないが、他の人の核。また、ASRがストレスを受けている細胞や胚に対して保護的または不適応であるかどうかも明らかではない。最後に、コフィリンの過剰活性化やアクチンロッドアセンブリの根底にある詳細なメカニズムはまだ分かりません。したがって、このプロトコルは、生きたフルーツフライ胚の非常に難しい実験システムにおけるアクチンロッド形成およびダイナミクスを視覚化することによってASRを探査するための迅速かつ汎用性の高いアッセイを提供する。
生きているショウジョウバエ胚にG-アクチンレッドをマイクロインジェクトするプロトコルは、組織構築イベント中に正常な細胞質アクチン構造17のダイナミクスを研究するために最初に開発された。これらの研究では、G-アクチンレッド注射は、サイトカネシスまたは胃の17、18を含む胚の初期の発達過程に悪影響を及ぼさないことを発見した。その後、プロトコルを変更し、ASR1を受けている熱ストレス胚のアクチンロッドのイメージングを可能にするために、胚処理およびG-アクチンレッド注入を適応させる。G-アクチン赤注射以外の他の方法は、胚中のアクチンを視覚化するために使用することができる。これらの方法は、アクチンまたはウトロフィン-mCherry、ライフアクト、F-トラチンGFP、およびモージンGFPなどのアクチン結合タンパク質のドメインにタグ付けされた蛍光タンパク質(FP)を発現させることに依存している(19でレビュー)。しかし、これらのFPプローブを使用すると、いくつかのアクチン構造を安定または破壊する可能性があるため注意が必要であり、すべてのアクチン構造20に等しくラベルを付け、アクチンGFPの場合は、応力依存だけでなくアクチン濃度依存性のロッドアセンブリの分析に問題がある。したがって、G-アクチンレッドは、フライ胚のロッド研究のための好ましいプローブであり、胚の大きなサイズは、その容易な注射を可能にする。
このプロトコルのワークフローは、ショウジョウバエ胚21、22、23、24、25、26、27にタンパク質、核酸、薬物、および蛍光指標を注入するために使用されてきた他の確立されたマイクロインジェクション技術に似ています。しかし、ここでのG-アクチンレッドのマイクロインジェクションに続いて、胚は、ASRおよび核内アクチン棒集合体を誘導するために軽度の熱ストレスにさらされる。ハエや注入リグにアクセスできるラボでは、異なるストレスによる誘導や、異なる遺伝的背景での変調など、ASRに関する特定の研究ラインに対して、この方法を容易に実装し、適応可能にする必要があります。

<table><tbody><tr><td>Adenosine triphosphate (ATP)</td><td>Millipore-Sigma</td><td>A23835G</td><td>Component of G buffer</td></tr><tr><td>Apple juice, Mott&#039;s, 64 fl oz</td><td>Mott&#039;s</td><td>014800000344</td><td>Component of apple juice plates</td></tr><tr><td>Bacto Agar</td><td>BD</td><td>214010</td><td>Component of apple juice plates</td></tr><tr><td>Bleach, PureBright Germicidal, 6.0% sodium hypochlorite</td><td>KIK International</td><td>059647210020</td><td>For dechorionating embryos</td></tr><tr><td>Calcium chloride</td><td>Millipore-Sigma</td><td>C1016500G</td><td>Component of G buffer</td></tr><tr><td>Cell strainer, 70 &amp;mu;m</td><td>Falcon</td><td>352350</td><td>For collecting dechorionated embryos</td></tr><tr><td>Confocal microscope, LSM 880 34-channel with Airyscan</td><td>Zeiss</td><td>0000001994956</td><td>For imaging intranuclear actin rods</td></tr><tr><td>Desiccant</td><td>Drierite</td><td>24001</td><td>For desiccating embryos</td></tr><tr><td>Dissecting microscope, Stemi 508 Stereoscope with 8:1 zoom</td><td>Zeiss</td><td>4350649000000</td><td>For arranging embryos on agar wedge</td></tr><tr><td>Dissecting needle, 5 in</td><td>Fisher Scientific</td><td>08965A</td><td>For arranging embryos on agar wedge</td></tr><tr><td>Dithiothreitol (DTT)</td><td>Fisher Scientific</td><td>BP1725</td><td>Component of G buffer</td></tr><tr><td>Double-sided Tape, Scotch Permanent, 0.5 in x 250 in</td><td>3M</td><td>021200010323</td><td>For making embryo glue</td></tr><tr><td>Embryo collection cage</td><td>Genessee Scientific</td><td>59100</td><td>For housing adult flies and collecting embryos</td></tr><tr><td>Fine tip tweezers, Dumont Tweezer, Style 5</td><td>Electron Microscopy Sciences</td><td>72701D</td><td>For arranging embryos on agar wedge</td></tr><tr><td>Glass capillaries, Borosillicate glass, thin 1 mm x 0.75 mm</td><td>World Precision Instruments, Inc.</td><td>TW1004</td><td>For microneedles</td></tr><tr><td>Halocarbon oil 27</td><td>Millipore-Sigma</td><td>H8773100ML</td><td>For hydration of embryos</td></tr><tr><td>Heated stage incubator</td><td>Zeiss</td><td>4118579020000, 4118609020000, 4118609010000</td><td>For confocal imaging</td></tr><tr><td>Lab Tissue Wipers, KimWipes</td><td>Kimberly-Clark</td><td>34155</td><td>Lab tissue wipers</td></tr><tr><td>Light microscope, Invertoskop 40C Inverted Phase contrast microscope, refurbished</td><td>Zeiss</td><td>Discontinued</td><td>Injection microscope</td></tr><tr><td>Methyl-4-hydroxybenzoate</td><td>Millipore-Sigma</td><td>H36471KG</td><td>Component of apple juice plates</td></tr><tr><td>Microinjector, FemtoJet4x</td><td>Eppendorf</td><td>5253000025</td><td>Microinjector</td></tr><tr><td>Micro loader tips, epT.I.P.S. 20 &amp;mu;L</td><td>Eppendorf</td><td>5242956003</td><td>For loading microneedles</td></tr><tr><td>Micromanipulator and injection stage with x,y,z dials for needle adjustment</td><td>Bernard Instruments, Inc (Houston, TX)</td><td>Custom</td><td>For performing microinjections</td></tr><tr><td>Micropipette puller, Model P-97, Flaming/Brown</td><td>Sutter Instruments</td><td>P97</td><td>For pulling capillary tubes to make microneedles</td></tr><tr><td>Microscope cover glass 24x50-1.5</td><td>Fisher Scientific</td><td>12544E</td><td>For mounting embryos</td></tr><tr><td>Microscope slides, Lilac Colorfrost, Precleaned, 25 x 75 x 1mm</td><td>Fisher Scientific</td><td>22037081</td><td>For mounting embryos for injection</td></tr><tr><td>n-Heptane</td><td>Fisher Scientific</td><td>H3601</td><td>Component of embryo glue</td></tr><tr><td>Objective, 10x</td><td>Zeiss</td><td>Discontinued</td><td>10x objective for injection microscope</td></tr><tr><td>Objective, C-Apochromat 40x/1,2 W Korr. FCS</td><td>Zeiss</td><td>4217679971711</td><td>40x water objective for confocal</td></tr><tr><td>Objective, LD LCI Plan-Apochromat 25x/0.8 Imm Cor DIC M27 for oil, water, silicone oil or glycerine immersion (D=0-0.17mm) (WD=0.57mm at D=0.17mm)</td><td>Zeiss</td><td>4208529871000</td><td>25x mixed immersion objective for confocal</td></tr><tr><td>Objective, Plan-Apocrhomat 63x/1.40 Oil DIC f/ELYRA</td><td>Zeiss</td><td>4207829900799</td><td>63x oil objective for confocal</td></tr><tr><td>Paintbrush, Robert Simmons Expression E85 Pointed Round size 2</td><td>Daler-Rowney</td><td>038372016954</td><td>For transferring embryos</td></tr><tr><td>Paper towels, Kleenex C-fold paper towels, white</td><td>Kimberly-Clark</td><td>884266344845</td><td>For blotting cell strainer</td></tr><tr><td>Pasteur pipette, 5 3/4 in</td><td>Fisher Scientific</td><td>1367820A</td><td>For covering embryos with oil</td></tr><tr><td>Petri dish, glass, 100 x 20 mm</td><td>Corning</td><td>3160102</td><td>For humid incubation chamber</td></tr><tr><td>Petri dish, plastic, 60 x 15 mm</td><td>VWR</td><td>25384092</td><td>For apple juice plates</td></tr><tr><td>Pipette, Eppendorf Reference 0.5-10 &amp;mu;L</td><td>Eppendorf</td><td>2231000604</td><td>For loading the microneedle</td></tr><tr><td>Pipette tip, xTIP4 250 &amp;mu;L</td><td>Biotix</td><td>63300006</td><td>For adding embryo glue to coverslip</td></tr><tr><td>Razor blade</td><td>VWR</td><td>55411050</td><td>For cutting agar wedge, tape, pipette tips</td></tr><tr><td>Rhodamine-conjugated globular actin, human platelet (non-muscle; 4x10 &amp;mu;g)</td><td>Cytoskeleton, Inc.</td><td>APHR-A</td><td>G-actin^Red</td></tr><tr><td>Scintillation vial, 20 mL Glass borosillicate with polyethylene liner and urea caps</td><td>Fisher Scientific</td><td>033377</td><td>For making embryo glue</td></tr><tr><td>Screw top jar, 16 oz</td><td>Nalgene</td><td>000194414195</td><td>For desiccating embryos</td></tr><tr><td>Stage micrometer</td><td>Electron Microscopy Sciences</td><td>602104PG</td><td>For calibrating volume of G-actin injection</td></tr><tr><td>Sucrose</td><td>Millipore-Sigma</td><td>840971KG</td><td>Component of apple juice plates</td></tr><tr><td>Trizma base</td><td>Millipore-Sigma</td><td>T15031KG</td><td>Component of G buffer</td></tr><tr><td>Yeast, Lesaffre Yeast Corporation Yeast, Red Star Active Dry, 32 oz</td><td>Lesaffre Yeast Corporation</td><td>117929157002</td><td>Component of yeast paste</td></tr></tbody></table>

imaging intranuclear actin rods in live heat stressed drosophila embryos

このプロトコルの目的は、熱ストレスに続く生きたショウジョウバエメラノガスター胚に集まり、核内アクチン棒を可視化することです。アクチンロッドは、神経変性疾患を含むヒト病理に付随する保存された誘導アクチンストレス応答(ASR)の特徴である。以前は、ASRが形態形成の失敗と胚の発達の生存率の低下に寄与することを示した。このプロトコルは、イメージング、遺伝学および生化学に非常に適したモデルシステムにおけるアクチンロッドアセンブリおよびASRの基礎となるメカニズムの継続的な研究を可能にする。胚は回収され、注入のためにそれらを準備するためにカバースリップに取り付けられる。ローダミン共役球状アクチン(G-アクチンレッド)を希釈し、マイクロニードルに装填する。各胚の中心に1回の注射が行われる。注射後、胚は高温でインキュベートされ、核内アクチン棒は共焦点顕微鏡で視覚化される。光漂白(FRAP)実験後の蛍光回復はアクチン棒に対して行われ得る。細胞質中のアクチンが豊富なその他の構造も画像化することができる。我々は、G-アクチンレッドが内因性G-アクチンのように重合し、単独では正常な胚の発達を妨げないことを発見した。このプロトコルの1つの制限は、胚への重大な傷害を避けるために注射中に注意を払わなければならないということです。しかし、練習では、ショウジョウバエ胚にG-actinRedを注入することは、アクチンロッドを視覚化するための迅速かつ信頼性の高い方法であり、任意の遺伝子型のハエや低酸素症や酸化ストレスを含む他の細胞ストレスの導入で簡単に使用することができます。

胚処理の概略的なワークフローを 図 1に示し、代表的な実験のタイムテーブルを 表 1に示します。良好な実験結果の推定は、注入された10個の胚ごとに、見られる胚の少なくとも半分が正しい発達段階にあり、損傷を受けておらず、32°Cの熱ストレスを伴う堅牢なASRを示すということです。 このASRは、 図2A( 右パネル)の胚の代表的な表...

Watch this Scientific Journal Video about Imaging Intranuclear Actin Rods in Live Heat Stressed Drosophila Embryos at JoVE.com

Imaging Intranuclear Actin Rods in Live Heat Stressed Drosophila Embryos

このプロトコルの目的は、熱ストレスに続いて、ショ ウジョウバエ 胚および画像核内アクチン棒集合体にローダミン共役球状アクチンを注入することです。

ライブ熱ストレスショ ウジョウバエ 胚における核内アクチンロッドのイメージング

The purpose of this protocol is to visualize intranuclear actin rods that assemble in live Drosophila melanogaster embryos following heat stress. Actin ...

imaging-intranuclear-actin-rods-live-heat-stressed-drosophila

Research

JoVE Journal

Developmental Biology

Imaging Intranuclear Actin Rods in Live Heat Stressed Drosophila Embryos

3.4K ビュー.  Baylor College of Medicine. このプロトコルの目的は、熱ストレスに続いて、ショ ウジョウバエ 胚および画像核内アクチン棒集合体にローダミン共役球状アクチンを注入することです。

ビデオ: Imaging Intranuclear Actin Rods in Live Heat Stressed Drosophila Embryos

Upright Imaging of Drosophila Egg Chambers

Drosophila melanogaster oogenesis provides an ideal context for studying varied developmental processes since the ovary is relatively simple in architecture, is well-characterized, and is amenable to genetic analysis. Each egg chamber consists of germ-line cells surrounded by a single epithelial layer of somatic follicle cells. Subsets of follicle cells undergo differentiation during specific stages to become several different cell types. Standard techniques primarily allow for a lateral view of egg chambers, and therefore a limited view of follicle cell organization and identity. The upright imaging protocol describes a mounting technique that enables a novel, vertical view of egg chambers with a standard confocal microscope. Samples are first mounted between two layers of glycerin jelly in a lateral (horizontal) position on a glass microscope slide. The jelly with encased egg chambers is then cut into blocks, transferred to a coverslip, and flipped to position egg chambers upright. Mounted egg chambers can be imaged on either an upright or an inverted confocal microscope. This technique enables the study of follicle cell specification, organization, molecular markers, and egg development with new detail and from a new perspective.

Upright Imaging of Drosophila Egg Chambers

The upright imaging method described in this protocol allows for the detailed visualization of the poles of a developing Drosophila melanogaster egg. This end-on view provides a new perspective into the arrangements and morphologies of multiple cell types in the follicular epithelium.

のアップライトイメージング<em&gt;ショウジョウバエ</em&gt;エッグチェンバース

Drosophila melanogaster oogenesis provides an ideal context for studying varied developmental processes since the ovary is relatively simple in ...

発生生物学

Dissection and Imaging of Active Zones in the Drosophila Neuromuscular Junction

The Drosophila larvae neuromuscular junction (NMJ) is an excellent model for the study of synaptic structure and function. Drosophila is well known for the ease of powerful genetic manipulations and the larval nervous system has proven particularly useful in studying not only normal function but also perturbations that accompany some neurological disease (Lloyd and Taylor, 2010). Many key synaptic molecules found in Drosophila are also found in mammals and like most CNS excitatory synapses in mammals, the Drosophila NMJ is glutamatergic and demonstrates activity-dependent remodeling (Kohet al. , 2000). Additionally, Drosophila neurons can be individually identified because their innervation patterns are stereotyped and repetitive making it possible to study identified synaptic terminals, such as those between motor neurons and the body-wall muscle fibers that they innervate (Keshishian and Kim, 2004). The existence of evolutionarily conserved synapse components along with the ease of genetic and physical manipulation make the Drosophila model ideal for investigating the mechanisms underlying synaptic function (Budnik, 1996).
The active zones at synaptic terminals are of particular interest because these are the sites of neurotransmitter release. NC82 is a monoclonal antibody that recognizes the Drosophila protein Bruchpilot (Brp), a CAST1/ERC family member that is an important component of the active zone (Waghet al. , 2006). Brp was shown to directly shape the active zone T-bar and is responsible for effectively clustering Ca2+ channels beneath the T-bar density (Fouquetet al. , 2009). Mutants of Brp have reduced Ca2+ channel density, depressed evoked vesicle release, and altered short-term plasticity (Kittelet al. , 2006). Alterations to active zones have been observed in Drosophila disease models. For example, immunofluorescence using the NC82 antibody showed that the active zone density was decreased in models of amyotrophic lateral sclerosis and Pitt-Hopkins syndrome (Ratnaparkhiet al. , 2008; Zweieret al. , 2009). Thus, evaluation of active zones, or other synaptic proteins, in Drosophila larvae models of disease may provide a valuable initial clue to the presence of a synaptic defect.
Preparing whole-mount dissected Drosophila larvae for immunofluorescence analysis of the NMJ requires some skill, but can be accomplished by most scientists with a little practice. Presented is a method that provides for multiple larvae to be dissected and immunostained in the same dissection dish, limiting environmental differences between each genotype and providing sufficient animals for confidence in reproducibility and statistical analysis.

Dissection and Imaging of Active Zones in the Drosophila Neuromuscular Junction

The neuromuscular junction (NMJ) of Drosophila melanogaster is an important model system for studying normal synaptic function as well as perturbations to synaptic function found in certain neurological diseases. We present a protocol for dissection of the Drosophila larval motor system and immunostaining for active zone proteins within the NMJ.

で、アクティブなゾーンの解剖とイメージングショウジョウバエ神経筋接合部

The Drosophila  larvae neuromuscular junction (NMJ) is an excellent model for the study of synaptic structure and function. Drosophila  is well known for ...

神経科学

Imaging Calcium in Drosophila at Egg Activation

Egg activation is a universal process that includes a series of events to allow the fertilized egg to complete meiosis and initiate embryonic development. One aspect of egg activation, conserved across all organisms examined, is a change in the intracellular concentration of calcium (Ca2+) often termed a 'Ca2+ wave'. While the speed and number of oscillations of the Ca2+ wave varies between species, the change in intracellular Ca2+ is key in bringing about essential events for embryonic development. These changes include resumption of the cell cycle, mRNA regulation, cortical granule exocytosis, and rearrangement of the cytoskeleton.
In the mature Drosophila egg, activation occurs in the female oviduct prior to fertilization, initiating a series of Ca2+-dependent events. Here we present a protocol for imaging the Ca2+ wave in Drosophila. This approach provides a manipulable model system to interrogate the mechanism of the Ca2+ wave and the downstream changes associated with it.

Imaging Calcium in Drosophila at Egg Activation

This article describes an adaptable ex vivo protocol for visualizing Ca2+ during egg activation in Drosophila.

内イメージングカルシウム<em&gt;ショウジョウバエ</em&gt;卵活性化で

Egg activation is a universal process that includes a series of events to allow the fertilized egg to complete meiosis and initiate embryonic development. ...

In Vivo Imaging of Muscle-tendon Morphogenesis in Drosophila Pupae

Muscles together with tendons and the skeleton enable animals including humans to move their body parts. Muscle morphogenesis is highly conserved from animals to humans. Therefore, the powerful Drosophila model system can be used to study concepts of muscle-tendon development that can also be applied to human muscle biology. Here, we describe in detail how morphogenesis of the adult muscle-tendon system can be easily imaged in living, developing Drosophila pupae. Hence, the method allows investigating proteins, cells and tissues in their physiological environment. In addition to a step-by-step protocol with helpful tips, we provide a comprehensive overview of fluorescently tagged marker proteins that are suitable for studying the muscle-tendon system. To highlight the versatile applications of the protocol, we show example movies ranging from visualization of long-term morphogenetic events &#8211; occurring on the time scale of hours and days &#8211; to visualization of short-term dynamic processes like muscle twitching occurring on time scale of seconds. Taken together, this protocol should enable the reader to design and perform live-imaging experiments for investigating muscle-tendon morphogenesis in the intact organism.

In Vivo Imaging of Muscle-tendon Morphogenesis in Drosophila Pupae

Here, we present an easy-to-use and versatile method to perform live imaging of developmental processes in general and muscle-tendon morphogenesis in particular in living Drosophila pupae.

生体内でショウジョウバエの蛹の筋腱の形態形成の観察

Muscles together with tendons and the skeleton enable animals including humans to move their body parts. Muscle morphogenesis is highly conserved from ...

Drosophila Embryo Preparation and Microinjection for Live Cell Microscopy Performed using an Automated High Content Analyzer

Modern approaches in quantitative live cell imaging have become an essential tool for exploring cell biology, by enabling the use of statistics and computational modeling to classify and compare biological processes. Although cell culture model systems are great for high content imaging, high throughput studies of cell morphology suggest that ex vivo cultures are limited in recapitulating the morphological complexity found in cells within living organisms. As such, there is a need for a scalable high throughput model system to image living cells within an intact organism. Described here is a protocol for using a high content image analyzer to simultaneously acquire multiple time-lapse videos of embryonic Drosophila melanogaster development during the syncytial blastoderm stage. The syncytial blastoderm has traditionally served as a great in vivo model for imaging biological events; however, obtaining a significant number of experimental replicates for quantitative and high-throughput approaches has been labor intensive and limited by the imaging of a single embryo per experimental repeat. Presented here is a method to adapt imaging and microinjection approaches to suit a high content imaging system, or any inverted microscope capable of automated multipoint acquisition. This approach enables the simultaneous acquisition of 6-12 embryos, depending on desired acquisition factors, within a single imaging session.

Presented here is a protocol to microinject and simultaneously image multiple Drosophila embryos during embryonic development using a plate-based, high content imager.

ショウジョウバエ胚の調製と、自動高コンテンツアナライザを用いた生細胞顕微鏡のための微小注入

Modern approaches in quantitative live cell imaging have become an essential tool for exploring cell biology, by enabling the use of statistics and ...

In vivo Imaging of Intact Drosophila Larvae at Sub-cellular Resolution

Recent improvements in optical imaging, genetically encoded fluorophores and genetic tools allowing efficient establishment of desired transgenic animal lines have enabled biological processes to be studied in the context of a living, and in some instances even behaving, organism. In this protocol we will describe how to anesthetize intact Drosophila larvae, using the volatile anesthetic desflurane, to follow the development and plasticity of synaptic populations at sub-cellular resolution1-3. While other useful methods to anesthetize Drosophila melanogaster larvae have been previously described4,5,6,7,8, the protocol presented herein demonstrates significant improvements due to the following combined key features: (1) A very high degree of anesthetization; even the heart beat is arrested allowing for lateral resolution of up to 150 nm1, (2) a high survival rate of &gt; 90% per anesthetization cycle, permitting the recording of more than five time-points over a period of hours to days2 and (3) a high sensitivity enabling us in 2 instances to study the dynamics of proteins expressed at physiological levels. In detail, we were able to visualize the postsynaptic glutamate receptor subunit GluR-IIA expressed via the endogenous promoter1 in stable transgenic lines and the exon trap line FasII-GFP1. (4) In contrast to other methods4,7 the larvae can be imaged not only alive, but also intact (i.e. non-dissected) allowing observation to occur over a number of days1. The accompanying video details the function of individual parts of the in vivo imaging chamber2,3, the correct mounting of the larvae, the anesthetization procedure, how to re-identify specific positions within a larva and the safe removal of the larvae from the imaging chamber.

In vivo Imaging of Intact Drosophila Larvae at Sub-cellular Resolution

This protocol describes a reliable method for anesthetization and imaging of intact Drosophila melanogaster larvae. We have utilized the volatile anesthetic desflurane to allow for repetitive imaging at sub-cellular resolution and re-identification of structures for up to a few days1.

サブセルラー解像度で手つかずのショウジョウバエの幼虫の in vivoイメージングで

Recent improvements in optical imaging, genetically encoded fluorophores and genetic tools allowing efficient establishment of desired transgenic animal ...

生物学

Real-Time Imaging of Germline Stem Cells in Drosophila Ex Vivo Germaria Culture

Extended Live Imaging of Female Drosophila melanogaster Germline Stem Cell Niches

Live imaging methods allow the analysis of dynamic cellular processes in detail and in real-time. The Drosophila ovary represents an excellent model to explore the dynamics of a myriad of developmental processes, such as cell division, stemness, differentiation, migration, apoptosis, autophagy, cellular adhesion, etc., over time. Recently, we have implemented an extended ex vivo culture and live imaging of the female Drosophila GSC niche. Using a Drosophila line harboring a GFP::Par-1 transgene as an example, this method allows the visualization of the GSCs&#39; asymmetric division within their niche and the description of the changes in the spectrosome morphology along the cell cycle. Here, we present a detailed protocol for the ex vivo culture of Drosophila germaria, enabling prolonged visualization of the female GSC niche. Importantly, this protocol is broadly applicable to live imaging GSCs with multiple fluorescently tagged proteins of interest that are available in stock centers and/or in the Drosophila research community.

Here, we provide a detailed protocol to perform live imaging of the asymmetric division of germline stem cells (GSCs) in the Drosophila ovarian niche. We use a transgenic line that ubiquitously expresses a green fluorescent protein (GFP) fusion of the spectrosome protein Par-1.

Live imaging methods allow the analysis of dynamic cellular processes in detail and in real-time. The Drosophila ovary represents an excellent model to ...

Live Imaging of GFP-labeled Proteins in Drosophila Oocytes

The Drosophila oocyte has been established as a versatile system for investigating fundamental questions such as cytoskeletal function, cell organization, and organelle structure and function. The availability of various GFP-tagged proteins means that many cellular processes can be monitored in living cells over the course of minutes or hours, and using this technique, processes such as RNP transport, epithelial morphogenesis, and tissue remodeling have been described in great detail in Drosophila oocytes1,2.
The ability to perform video imaging combined with a rich repertoire of mutants allows an enormous variety of genes and processes to be examined in incredible detail. One such example is the process of ooplasmic streaming, which initiates at mid-oogenesis3,4. This vigorous movement of cytoplasmic vesicles is microtubule and kinesin-dependent5 and provides a useful system for investigating cytoskeleton function at these stages.
Here I present a protocol for time lapse imaging of living oocytes using virtually any confocal microscopy setup.

Live Imaging of GFP-labeled Proteins in Drosophila Oocytes

A protocol for live imaging of GFP-tagged proteins or autofluorescent structures in individual Drosophila oocytes is described.

でGFP標識タンパク質のイメージングを生きる<em&gt;ショウジョウバエ</em&gt;卵母細胞

The  Drosophila oocyte has been established as a versatile system for investigating  fundamental questions such as cytoskeletal function, cell ...

Cytological Analysis of Spermatogenesis: Live and Fixed Preparations of Drosophila Testes

Drosophila melanogaster is a powerful model system that has been widely used to elucidate a variety of biological processes. For example, studies of both the female and male germ lines of Drosophila have contributed greatly to the current understanding of meiosis as well as stem cell biology. Excellent protocols are available in the literature for the isolation and imaging of Drosophila ovaries&#160;and testes3-12. Herein, methods for the dissection and preparation of Drosophila testes for microscopic analysis are described with an accompanying video demonstration. A protocol for isolating testes from the abdomen of adult males and preparing slides of live tissue for analysis by phase-contrast microscopy as well as a protocol for fixing and immunostaining testes for analysis by fluorescence microscopy are presented. These techniques can be applied in the characterization of Drosophila mutants that exhibit defects in spermatogenesis as well as in the visualization of subcellular localizations of proteins.

Cytological Analysis of Spermatogenesis: Live and Fixed Preparations of Drosophila Testes

Methods for isolating and preparing Drosophila testes samples (live and fixed) for imaging by phase-contrast and fluorescence microscopy are described herein.&#160;

精子形成細胞学的分析：ライブとの固定の準備<em&gt;ショウジョウバエ</em&gt;精巣

Drosophila melanogaster is a powerful model system that has been widely used to elucidate a variety of biological processes. For example, studies of both ...

ショウジョウバエの神経筋接合部および筋細胞における微小管ネットワークの表示

Using Drosophila Larval Neuromuscular Junction and Muscle Cells to Visualize Microtubule Network

The microtubule network is an essential component of the nervous system. Mutations in many microtubules regulatory proteins are associated with neurodevelopmental disorders and neurological diseases, such as microtubule-associated protein Tau to neurodegenerative diseases, microtubule severing protein Spastin and Katanin 60 cause hereditary spastic paraplegia and neurodevelopmental abnormalities, respectively. Detection of microtubule networks in neurons is advantageous for elucidating the pathogenesis of neurological disorders. However, the small size of neurons and the dense arrangement of axonal microtubule bundles make visualizing the microtubule networks challenging. In this study, we describe a method for dissection of the larval neuromuscular junction and muscle cells, as well as immunostaining of &#945;-tubulin and microtubule-associated protein Futsch to visualize microtubule networks in Drosophila melanogaster. The neuromuscular junction permits us to observe both pre-and post-synaptic microtubules, and the large size of muscle cells in Drosophila larva allows for clear visualization of the microtubule network. Here, by mutating and overexpressing Katanin 60 in Drosophila melanogaster,&#160;and then examining the microtubule networks in the neuromuscular junction and muscle cells, we&#160;accurately reveal the regulatory role of Katanin 60 in neurodevelopment. Therefore, combined with the powerful genetic tools of Drosophila&#160;melanogaster, this protocol greatly facilitates genetic screening and microtubule dynamics analysis for the role of microtubule network regulatory proteins in the nervous system.

著者スポットライト:ショウジョウバエの神経筋接合部における微小管ネットワークの理解 

Here, we present a detailed protocol to visualize the microtubule networks in neuromuscular junctions and muscle cells. Combined with the powerful genetic tools of Drosophila melanogaster, this protocol greatly facilitates genetic screening and microtubule-dynamics analysis for the role of microtubule network regulatory proteins in the nervous system.

ライブ熱ストレスショウジョウバエ胚における核内アクチンロッドのイメージング

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のアップライトイメージング

で、アクティブなゾーンの解剖とイメージングショウジョウバエ神経筋接合部

内イメージングカルシウム

生体内でショウジョウバエの蛹の筋腱の形態形成の観察

ショウジョウバエ胚の調製と、自動高コンテンツアナライザを用いた生細胞顕微鏡のための微小注入

サブセルラー解像度で手つかずのショウジョウバエの幼虫の in vivoイメージングで

Extended Live Imaging of Female Drosophila melanogaster Germline Stem Cell Niches

でGFP標識タンパク質のイメージングを生きる

精子形成細胞学的分析：ライブとの固定の準備

ショウジョウバエ幼虫の神経筋接合部と筋細胞を用いた微小管ネットワークの可視化

ライブ熱ストレスショ ウジョウバエ 胚における核内アクチンロッドのイメージング

要約

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この動画の章

のアップライトイメージング

で、アクティブなゾーンの解剖とイメージングショウジョウバエ神経筋接合部

内イメージングカルシウム

生体内でショウジョウバエの蛹の筋腱の形態形成の観察

ショウジョウバエ胚の調製と、自動高コンテンツアナライザを用いた生細胞顕微鏡のための微小注入

サブセルラー解像度で手つかずのショウジョウバエの幼虫の in vivoイメージングで

Extended Live Imaging of Female Drosophila melanogaster Germline Stem Cell Niches

でGFP標識タンパク質のイメージングを生きる

精子形成細胞学的分析：ライブとの固定の準備

ショウジョウバエ幼虫の神経筋接合部と筋細胞を用いた微小管ネットワークの可視化

ライブ熱ストレスショウジョウバエ胚における核内アクチンロッドのイメージング