Name: three-dimensional reconstruction of the vascular architecture of the passive clarity-cleared mouse ovary
Uploaded: 2017-12-10T14:00:00
Description: Watch this Scientific Journal Video about Three-dimensional Reconstruction of the Vascular Architecture of the Passive CLARITY-cleared Mouse Ovary at JoVE.com

This study was supported by grants from the Chinese Special Fund for Postdocs (No. 2014T70392 to YF), the National Natural Science Foundation of China (No. 81673766 to YF), the New Teacher Priming Fund, the Zuoxue Foundation of Fudan University, and the Development Project of Shanghai Peak Disciplines-Integrative Medicine (20150407).

All procedures involving animal subjects followed the guidelines of the Animal Ethics Committee at Shanghai Medical College, Fudan University (Approval number 20160225-013).
1. Preparation of the Transparent Mouse Ovary
<ol>
	<li>Preparation of the solutions
	<ol>
		<li>Prepare phosphate-buffered saline (PBS) solution (1 M, pH 7.6) with 0.1% Triton X-100 (PBST). To make 1 L of 10x PBS stock solution, mix 87 g of NaCl, 3.1 g of NaH2PO4 &#183; 2H2</s...

<ol>
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In the current study, we present 3D imaging to evaluate the relationships between capillaries and individual growing follicles. In our previous work using the same protocol 9, we studied the roles of large vasculature, interactions between follicles, and the location of follicles in intact mouse ovaries. The passive CLARITY approach allowed us to study micro- and macro-vasculatures, folliculogenesis, and the interrelationships between the corpora lutea and follicles as well as to reconstruct the o...

The follicle is the fundamental structural and functional unit of the ovary, and its development is highly related to the vasculature within the ovary. Blood vessels supply nutrition and hormones to the follicles and thus play important roles in the growth and maturation of follicles1.
A combination of technologies, including selective blood vessel markers, transgenic mouse models, and pharmaceutical development, have increased our knowledge about ovarian vascular networks, angiogenesis, and the function of blood vessels in folliculogenesis. The ovary is known as an active organ because it remodels various tissues and vascular networks during folliculogenesis and ovulation. Such active remodeling in the size and structure of vessels is required for the biological function of developing and recruiting follicles.
Traditional histological and histomorphometric methods using ovarian sections and immunolabeling of blood vessels are limited to two-dimensional (2D) images2. With the development of three-dimensional (3D) reconstruction technologies, 2D images of tissue slices can be overlapped to make a 3D structure, but this method still has some limitations &#8212; sectioning of the tissue can destroy the microstructures, some parts of the tissue are often missing, and significant labor is involved in making 3D reconstructions from images obtained from slices. Whole-tissue 3D imaging with confocal microscopy can overcome many of these limitations, but these methods are limited to the evaluation of angiogenesis in the embryonic ovary3. Using whole tissue clearing methods such as CLARITY4 can increase the visualized volume so as to solve these problems in postnatal and adult ovaries, and such methods provide optical clearance of the ovary without any structural deformations. Imaging of the 3D architecture of the intact ovary provides an accurate image database for image analysis software, such as the Imaris software package used in this work.
Remodeling of the ovary throughout adulthood is part of a dynamic physiological system, and this makes the ovary an excellent model for investigations into the regulation of angiogenesis. Furthermore, evaluating the role of ovarian blood vessels in pathologic conditions of the female reproductive system such as polycystic ovary syndrome or ovarian cancers can be studied through whole ovarian tissue imaging. The development of the passive CLARITY method and the use of advanced image analysis software have provided detailed spatial information on the relationships between blood vessels and ovarian structures such as follicles.

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		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Acrylamide</td>
			<td style="width:189px;">Vetec</td>
			<td style="width:127px;">v900845</td>
			<td style="width:861px;">http://www.sigmaaldrich.com/catalog/product/vetec/v900845</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Alexa Flour 488 (Dilution 1:50)&#160;</td>
			<td style="width:189px;">Life Technologies</td>
			<td style="width:127px;">A11039</td>
			<td style="width:861px;">https://www.thermofisher.com/antibody/product/Goat-anti-Chicken-IgY-H-L-Secondary-Antibody-Polyclonal/A-11039</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Alexa Flour 594 (Dilution 1:50)</td>
			<td style="width:189px;">Life Technologies</td>
			<td style="width:127px;">A11012</td>
			<td style="width:861px;">https://www.thermofisher.com/antibody/product/Goat-anti-Rabbit-IgG-H-L-Cross-Adsorbed-Secondary-Antibody-Polyclonal/A-11012</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Bisacrylamide</td>
			<td style="width:189px;">Amresco</td>
			<td style="width:127px;">172</td>
			<td style="width:861px;">http://www.amresco-inc.com/BIS-ACRYLAMIDE-0172.cmsx</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Black wall glass bottom dish (Willco-Dish)</td>
			<td style="width:189px;">Ted Pella</td>
			<td style="width:127px;">14032</td>
			<td style="width:861px;">http://www.tedpella.com/section_html/706dish.htm#black_wall</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Boric acid</td>
			<td style="width:189px;">Sinopharm Chemical Reagent</td>
			<td style="width:127px;">10004818</td>
			<td style="width:861px;">http://en.reagent.com.cn/enshowproduct.jsp?id=10004818</td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;width:487px;">Disodium hydrogen phosphate dodecahydrate (Na2HPO4 12H2O)</td>
			<td style="width:189px;">Sinopharm Chemical Reagent</td>
			<td style="width:127px;">10020318</td>
			<td style="width:861px;">http://en.reagent.com.cn/enshowproduct.jsp?id=10020318</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">FocusClear</td>
			<td style="width:189px;">Celexplorer</td>
			<td style="width:127px;">FC-102</td>
			<td style="width:861px;">http://www.celexplorer.com/product_list.asp?MainType=107&#38;BRDarea=1</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Parafilm</td>
			<td style="width:189px;">Bemis</td>
			<td style="width:127px;">PM996</td>
			<td style="width:861px;">http://www.parafilm.com/products</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Paraformaldehyde</td>
			<td style="width:189px;">Sinopharm Chemical Reagent</td>
			<td style="width:127px;">80096618</td>
			<td style="width:861px;">http://en.reagent.com.cn/enshowproduct.jsp?id=80096618</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">PECAM1/CD31, platelet-endothelial cell adhesion molecule 1 (Dilution 1:10)</td>
			<td style="width:189px;">Abcam</td>
			<td style="width:127px;">ab28364</td>
			<td style="width:861px;">http://www.abcam.com/cd31-antibody-ab28364.html</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Photoinitiator VA044</td>
			<td style="width:189px;">Wako</td>
			<td style="width:127px;">va-044/225-02111</td>
			<td style="width:861px;">http://www.wako-chem.co.jp/specialty/waterazo/VA-044.htm</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Sodium azide</td>
			<td style="width:189px;">Sigma</td>
			<td style="width:127px;">S2002</td>
			<td style="width:861px;">http://www.sigmaaldrich.com/catalog/product/sial/s2002?lang=en&#38;region=US</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Sodium chloride (NaCl)</td>
			<td style="width:189px;">Sinopharm Chemical Reagent</td>
			<td style="width:127px;">10019318</td>
			<td style="width:861px;">http://en.reagent.com.cn/enshowproduct.jsp?id=10019318</td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;width:487px;">Sodium dihydrogen phosphate dihydrate (NaH2PO4 2H2O)</td>
			<td style="width:189px;">Sinopharm Chemical Reagent</td>
			<td style="width:127px;">20040718</td>
			<td style="width:861px;">http://en.reagent.com.cn/enshowproduct.jsp?id=20040718</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Sodium dodecyl sulfate</td>
			<td style="width:189px;">Sinopharm Chemical Reagent</td>
			<td style="width:127px;">30166428</td>
			<td style="width:861px;">http://en.reagent.com.cn/enshowproduct.jsp?id=30166428</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Sodium hydroxide (NaOH)</td>
			<td style="width:189px;">Sinopharm Chemical Reagent</td>
			<td style="width:127px;">10019718</td>
			<td style="width:861px;">http://en.reagent.com.cn/enshowproduct.jsp?id=10019718</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:487px;">Triton X-100</td>
			<td style="width:189px;">Sinopharm Chemical Reagent</td>
			<td style="width:127px;">30188928</td>
			<td style="width:861px;">http://en.reagent.com.cn/enshowproduct.jsp?id=30188928</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:487px;">Tyrosine hydroxylase (TH, Dilution 1:50)</td>
			<td style="width:189px;">Abcam</td>
			<td style="width:127px;">ab76442</td>
			<td style="width:861px;">http://www.abcam.com/tyrosine-hydroxylase-phospho-s40-antibody-ab51206.html</td>
		</tr>
	</tbody>
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three-dimensional reconstruction of the vascular architecture of the passive clarity-cleared mouse ovary

The ovary is the main organ of the female reproductive system and is essential for the production of female gametes and for controlling the endocrine system, but the complex structural relationships and three-dimensional (3D) vasculature architectures of the ovary are not well described. In order to visualize the 3D connections and architecture of blood vessels in the intact ovary, the first important step is to make the ovary optically clear. In order to avoid tissue shrinkage, we used the hydrogel fixation-based passive CLARITY (Clear Lipid-exchanged Acrylamide-hybridized Rigid Imaging/ Immunostaining/In situ-hybridization-compatible Tissue Hydrogel) protocol method to clear an intact ovary. Immunostaining, advanced multiphoton confocal microscopy, and 3D image-reconstructions were then used for the visualization of ovarian vessels and follicular capillaries. Using this approach, we showed a significant positive correlation (P &#60;0.01) between the length of the follicular capillaries and volume of the follicular wall.

We adapted the passive CLARITY method into a quick and simple method for passive ovary clearing while preserving the follicular and vascular architecture and obtaining the highest fluorescent signal from labeled markers of vessels and follicles. The 3D architecture of the follicular vasculature was determined by immunostaining for CD31, a marker for endothelial cells6. CD31 staining in the ovaries of adult mice was traced using the Filament algorithm and showed int...

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Three-dimensional Reconstruction of the Vascular Architecture of the Passive CLARITY-cleared Mouse Ovary

Here we present an adaptation of the passive CLARITY and 3D reconstruction method for visualization of the ovarian vasculature and follicular capillaries in intact mouse ovaries.

The ovary is the main organ of the female reproductive system and is essential for the production of female gametes and for controlling the endocrine ...

Research

JoVE Journal

Biology

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