This work was supported by the National Natural Science Foundation of China (81573992). We thank Emily K. Lo and Kathleen DiNapoli for their language editing assistance.

The protocol follows the animal care guidelines of Shanghai University of Traditional Chinese Medicine and is approved by the animal experiment Shanghai Animal Ethics Committee.
1. Protocol I: Preparation of EXD
<ol>
	<li>Calculation
	<ol>
		<li>Administer the EXD to a treatment group of 10 Six month-old female Imprinting Control Region (ICR)&#160;mice (0.02 kg/mouse), 5 days per week for 12 weeks. 
		NOTE: A total of 1.702 EXDs are needed. Because EXDs are measured in discrete increments, in real practice, administer 2 EXDs.</li>
		<li>Calculate the volume of EXD applied per mouse (i.e. V = (0.1418 EXD/kg&#8226;day) * (0.02 kg/mouse) * 50 mL/EXD = 0.14 mL/mouse&#8226;day).</li>
	</ol>
	</li>
	<li>Soaking
	<ol>
		<li>Put all the raw materials of two EXDs (ie., Curculigo orchioides Gaertn (18 g), Herbaa Epimedii (18 g), Radix Morindae Officinalis (18 g), Radix Angelicae Sinensis (18 g), Cortex Phellodendri (12 g), and Rhizoma Anemarrhenae (12 g), 96 g in total) into a container with a lid. 
		NOTE: A ceramic container is recommended.</li>
		<li>Macerate the raw herbs with 500 mL of distilled water for 1 h; the water should cover the herbs by about an inch. Let all the herbs thoroughly soak.</li>
	</ol>
	</li>
	<li>First water decoction
	<ol>
		<li>Heat the herbs using a gas cooker or an induction cooker on high power until the water boils (about 5 - 10 min; the time span depends on the heating power, the container, and the quantity of herbs and water). Turn down the power to a low simmer for 2 h.</li>
	</ol>
	</li>
	<li>First filtration
	<ol>
		<li>Cover a 500-mL glass beaker with regular filter paper or with gauze and cotton. Carefully pour off the decoction into the beaker through the filter. Leave the herbs in the container.</li>
		<li>Return the remaining herbal residue on the filter paper to the container.</li>
	</ol>
	</li>
	<li>Second water decoction
	<ol>
		<li>Add distilled water to the container with the herbs; let it cover the herbs by about an inch.</li>
		<li>Repeat step 1.3.</li>
	</ol>
	</li>
	<li>Second filtration
	<ol>
		<li>Repeat steps 1.4.1 and 1.4.2.</li>
		<li>Pour off the second decoction into the same beaker. Mix the first and second decoctions together.</li>
	</ol>
	</li>
	<li>Concentration
	<ol>
		<li>Put the beaker onto a gas cooker with asbestos-free wire gauze between them, heat the decoction using a low simmer, and slowly and continuously stir with a glass rod.</li>
		<li>When the decoction reduces to 200 mL, transfer it to a 500-mL beaker.</li>
		<li>Repeat step 1.7.1 until the decoction reduces to 100 mL.</li>
	</ol>
	</li>
	<li>Storage and administration
	<ol>
		<li>Transfer the concentrated decoction to a sterile glass bottle. Let it cool to room temperature (RT). Store at 4 &#176;C if using within one week or at -70 &#176;C for long-term storage.</li>
		<li>Using a gavage needle, administer 0.14 mL/mouse of the decoction to ovariectomized (OVX) mice once per day, 5 days a week for 12 weeks.</li>
	</ol>
	</li>
</ol>
2. Protocol II: Preparation of EXD-containing Serum
<ol>
	<li>Calculation
	<ol>
		<li>Calculate the rat-equivalent dose (RED) using 0.15 kg as the body weight of each rat (1 month old): dB = (1/60) * (90/100) * (60/0.15)1/3 = 0.111 EXD/kg/day. 
		NOTE: A total of 10 mL of EXD-containing serum is needed to prepare 100 mL of culture medium (10% EXD-containing serum). Each rat is expected to provide 2 mL of serum. Thus, 6 rats (a 20% loss is taken into account) are needed for EXD administration once a day for 3 days. The number of EXDs is: (0.111 EXD/kg&#8226;day) * (0.15 kg/rat) * (6 rats) * (3 days) = 0.300 EXD. Again, because EXDs are measured in discrete increments, use 1 EXD.</li>
		<li>Calculate the volume of EXD applied per rat (i.e., V = (0.111 EXD/kg&#8226;day) * (0.15 kg/rat) * (50 mL/EXD) = 0.83 mL/rat&#8226;day).</li>
	</ol>
	</li>
	<li>Soaking
	<ol>
		<li>Put the raw materials for 1 EXD into a container with a lid. Macerate the raw herbs in distilled water for 1 h; the water should cover the herbs by about an inch. Let all the herbs thoroughly soak.</li>
	</ol>
	</li>
	<li>First water decoction
	<ol>
		<li>Heat the herbs using an induction cooker on high power until the water boils (about 5 - 10 min; the time span depends on the heat power, the container, and the quantity of herbs and water). Turn the power down to a low simmer for 2 h.</li>
	</ol>
	</li>
	<li>First filtration
	<ol>
		<li>Cover a 500-mL glass beaker with regular filter paper or with gauze and cotton. Carefully pour off the decoction into the beaker through the filter. Leave the herbs in the container.</li>
		<li>Return the herbal residue on the filter paper to the container.</li>
	</ol>
	</li>
	<li>Second water decoction
	<ol>
		<li>Add distilled water to the container with the herbs; let it cover the herbs by about an inch.</li>
		<li>Repeat step 2.4.</li>
	</ol>
	</li>
	<li>Second filtration
	<ol>
		<li>Repeat steps 2.5.1 and 2.5.2.</li>
		<li>Pour off the second decoction into the same beaker as in step 2.4.1 and mix the first and second decoctions together.</li>
	</ol>
	</li>
	<li>Concentration
	<ol>
		<li>Put the beaker on a gas cooker with asbestos-free wire gauze between them, heat the decoction using a low simmer, and slowly and continuously stir with a glass rod.</li>
		<li>When the decoction reduces to 100 mL, transfer it to a 100-mL beaker.</li>
		<li>Repeat step 2.7.1 until the decoction reduces to 50 mL.</li>
	</ol>
	</li>
	<li>Storage and administration
	<ol>
		<li>Transfer the concentrated decoction into a sterile glass bottle. Let it cool to RT. Store at 4 &#176;C if using within one week or at -70 &#176;C for long-term storage.</li>
		<li>Intragastrically administer 0.83 mL/rat once per day for 3 days.</li>
	</ol>
	</li>
	<li>EXD-containing serum preparation
	<ol>
		<li>Anesthetize the rats by intraperitoneally injecting of 300 mL/100 g of 80 mg/kg ketamine and 10 mg/kg xylazine&#160;&#160;at 1 h after the last administration of EXD. Confirm proper anesthetization by toe pinch.</li>
		<li>Incise the skin and peritoneum of the rat from the abdomen to the bottom of the thorax using a scalpel (or straight operating scissors). Create an incision of length and depth of about 5 cm and 0.5 cm, respectively. Move the abdominal viscera to the left using tissue paper.</li>
		<li>Using tissue paper, remove the connective tissue of the abdominal aorta to clearly expose the vessel.</li>
		<li>Draw the blood slowly from the abdominal aorta using a 10-mL, 22-gauge syringe. Transfer it to a 15-mL sterile tube after removing the needle; one rat can produce 8-10 mL of blood. 
		NOTE: The rat should be alive (i.e., with the abdominal aorta pulsating) when beginning the blood drawing and dead after the drawing completes.</li>
		<li>Clot the blood in an upright position for 30 - 60 min at room RT. Centrifuge at 500-600 x g for 20 min. Carefully place all the supernatant (serum) in one 50-mL sterile tube and mix all the serum (from different animals) together.</li>
		<li>Perform heat inactivation by incubating the serum in a 56 &#176;C water bath for 30 min. Filter the serum using a syringe filter with a 0.22-&#181;m pore size hydrophilic polyethersulfone membrane. Use the serum fresh or store it at -20 &#176;C.</li>
	</ol>
	</li>
	<li>Control drug-containing serum preparation (used in the control group)
	<ol>
		<li>Administer each rat with the same volume of saline (0.83 mL) once per day for 3 days. The other steps are the same as in step 2.9.</li>
	</ol>
	</li>
	<li>Application
	<ol>
		<li>Add 10 mL of EXD-containing serum or drug-containing serum to each 100 mL of medium, plus 1% penicillin-streptomycin (PS)23.</li>
	</ol>
	</li>
</ol>

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L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effects+of+Ling+Qi+Juan+Gan+capsule+drug-containing+serum+on+PDGF-induced+proliferation+and+JAK/STAT+signaling+of+HSC-T6+cells].">Effects of Ling Qi Juan Gan capsule drug-containing serum on PDGF-induced proliferation and JAK/STAT signaling of HSC-T6 cells].</a> Zhonghua Gan Zang Bing Za Zhi. 21 (9), 663-667 (2013).</li><li>Li, Y. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=[Some+issues+in+methology+of+Chinese+herbs+serum+pharmcology].">[Some issues in methology of Chinese herbs serum pharmcology].</a> Zhong Yao Xin Yao Yu Lin Chuang Yao Li. 10 (5), 263 (1999).</li><li>Zhang, 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=[A+review+of+Chinese+herbs+serum+pharmcology+methodological+study].">[A review of Chinese herbs serum pharmcology methodological study].</a> Nan Jing Zhong Yi Yao Da Xue Xue Bao. 18 (4), 254 (2002).</li><li>Zhang, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=[Issues+and+strategies+for+study+of+serum+pharmcology+in+oncology].">[Issues and strategies for study of serum pharmcology in oncology].</a> Zhong Yi Yan Jiu. 17 (5), 13-14 (2004).</li></ol>

The authors declare that they have no competing financial interests.

In recent years, more attention has been paid to herbal medicines, one type of alternative medicine that has been applied in the clinical setting in the Eastern world for thousands of years. Different from the &#34;bench to bed&#34; pattern of modern medicine, traditional herbal medicine first require the &#34;bed to bench&#34; pattern to explain their mechanisms. This can be followed by validation performed at the bench stage and processing for the development of newly optimized drugs. So far, there are several extracti...

Interest in the study and application of traditional herbal medicine is currently growing. As opposed to modern drugs, in which chemical ingredients are definite, herbal formulas have some unknown ingredients and require extraction processes to enable the delivery of their active compounds. Although many studies try to select one small compound with a well-known structure as a representative of the whole herb or herbal formula, neither the pharmacological efficacies nor mechanisms can be considered equivalent1,2. While fingerprinting enables the analysis of the constituents of complex herbal formulas, some constituents are still not clearly analyzed, leading to a challenge when combining all extracts for study3. The interactions of numerous constituents/extracts mediate the therapeutic effects of herbal medicines. To retain this advantage, the traditional extract form&#8212;decoction&#8212;is still widely used in the clinic. Since the extract procedure has a great impact on the therapeutic efficacy, a standard protocol of traditional water decoction is necessary, especially for in vivo studies4,5.
On the other hand, when exploring pharmacological mechanisms, the administration of herbal decoctions during in vitro or ex vivo studies is also a challenge. The concept of a drug-containing serum was first proposed by Tashino in 19886. Since then, increasing numbers of researchers have applied it to herbal medicine7,8,9. Although the method of drug-containing serum has some limitations, such as the influence of certain components of the serum, it is still considered to be a method that closely mimics physiological conditions.
The er-xian decoction was developed in the early 1950s to relieve menopausal symptoms10,11,12,13. It has also been applied to the treatment of aplastic anemia14, menopausal osteoporosis15,16,17, premature ovarian failure18, breast cancer19, ovarian cancer20, and delayed puberty21. Here, we present detailed protocols for the preparation of both the er-xian decoction (EXD) and its drug-containing serum. In addition, we describe the application of EXD and EXD-containing serum to murine menopausal osteoporotic models.
An EXD is composed of 9 g each of Curculigo orchioides Gaertn, Herbaa Epimedii, Radix Morindae Officinalis, and Radix Angelicae Sinensis and 6 g each of Cortex Phellodendri and Rhizoma Anemarrhenae per adult patient per day. The equivalent dose for a mouse is 0.1418 EXD/kg/day based on the following equation22: dB = dA * RB / RA * (WA / WB) 1/3. dA and dB refer to the dose per bodyweight (mg/kg) of the human and mouse, respectively. The dose, in mg/kg, is replaced by the number of EXD/kg. RA and RB represent the human body factor and mouse body factor, respectively, which are proportional to the (body surface area (m2) / body weight (kg))2/3 (See Table 1). WA and WB indicate the bodyweight (kg) of the human and mouse, respectively.

<table border="0" cellpadding="0" cellspacing="0" width="651">
	
	<tbody>
		<tr height="165">
			<td height="165" style="height:165px;width:216px;">Curculigo orchioides Gaertn (9&#8201;g), Herbaa Epimedii (9&#8201;g), Radix Morindae Officinalis (9&#8201;g), Radix Angelicae Sinensis (9&#8201;g), Cortex Phellodendri (6&#8201;g), and Rhizoma Anemarrhenae (6&#8201;g)</td>
			<td style="width:149px;">Kang-qiao Chinese Medicine Yinpian Co. Ltd (Shanghai, CN)</td>
			<td style="width:119px;">160922</td>
			<td style="width:167px;">EXD components</td>
		</tr>
		<tr height="40">
			<td height="40" style="height:40px;width:216px;">Filter paper</td>
			<td style="width:149px;">GElifesciences</td>
			<td style="width:119px;">99-103-952</td>
			<td style="width:167px;">Filter EXD decoction before concentration</td>
		</tr>
		<tr height="60">
			<td height="60" style="height:60px;width:216px;">Imprinting Control Region (ICR) mice</td>
			<td style="width:149px;">Shanghai Laboratory Animal Center</td>
			<td style="width:119px;">SCXK 2007-0005</td>
			<td style="width:167px;">In vivo study</td>
		</tr>
		<tr height="60">
			<td height="60" style="height:60px;width:216px;">Sprague Dawley rats</td>
			<td style="width:149px;">Shanghai Laboratory Animal Center</td>
			<td style="width:119px;">SCXK 2007-0005</td>
			<td style="width:167px;">EXD-containing serum preparation</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;width:216px;">Syringe filter</td>
			<td style="width:149px;">Millipore</td>
			<td style="width:119px;">SLGP033RB</td>
			<td style="width:167px;">0.22 &#181;m</td>
		</tr>
		<tr height="61">
			<td height="61" style="height:61px;width:216px;">gavage needles (10 ml)</td>
			<td style="width:149px;">Shanghai BO Ge trade sales department</td>
			<td align="right" style="width:119px;">59104274</td>
			<td style="width:167px;">Adminstration of EXD</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;">Ketamine (80 mg/kg)&#160;</td>
			<td style="width:149px;">Fujian Gutian Pharma Co. Ltd</td>
			<td style="width:119px;">H35020148</td>
			<td>Anesthesia</td>
		</tr>
		<tr height="41">
			<td height="41" style="height:41px;width:216px;">Xylazine (10 mg/kg)</td>
			<td style="width:149px;">Sunway Pharma Co. Ltd</td>
			<td style="width:119px;">CB07591</td>
			<td>Anesthesia</td>
		</tr>
		<tr height="81">
			<td height="81" style="height:81px;width:216px;">Dulbecco&#8217;s modification of Eagle&#8217;s medium Dulbecco (DMEM) culture medium</td>
			<td style="width:149px;">Gibco</td>
			<td style="width:119px;">12800-116</td>
			<td style="width:167px;">DMEM with 2 mM L-glutamine and without ribonucleosides and ribonucleotides</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Streptomycin</td>
			<td style="width:149px;">Sigma</td>
			<td align="right" style="width:119px;">1277</td>
			<td style="width:167px;">100 &#181;g / ml</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">Penicillin</td>
			<td style="width:149px;">Sigma</td>
			<td align="right" style="width:119px;">4687</td>
			<td style="width:167px;">100 &#181;g / ml</td>
		</tr>
	</tbody>
</table>

preparation of herbal medicine: er-xian decoction and er-xian-containing serum for in vivo and in vitro experiments

Traditional herbal medicine, an alternative medicine in the clinical setting, has received increased attention in recent years. Before delivery to the body, an additional extraction procedure is commonly required to release the active constituents from raw herbs. Water decoction is a classical extraction procedure that is still broadly used in the clinical settings. Here, we propose a detailed protocol for er-xian decoction (EXD) in order to apply herbal decoctions to experimental studies. The calculation of an animal-appropriate dose is described, as well as the four main steps of EXD: soaking, water decoction, filtration, and concentration. In addition, serum-containing EXD is introduced to rats as a means of in vitro validation. Here, rats were orally administered EXD for three days. Blood samples were then collected, inactivated, centrifuged, and filtered. The serum, diluted with the culture medium, can be utilized to treat cells or tissues in vitro. For example, EXD was applied to both in vivo and in vitro studies and demonstrated that EXD enhances osteogenesis. This protocol can be used as a reference for the preparation and application of herbal medicines.

The effect of EXD on the bone density of OVX mice
Hematoxylin and eosin (H&#38;E) staining of the lumbar vertebra section shows increased bone trabeculae after EXD treatment in vivo (Figure 1A, right panel) compared with those in the OVX group (Figure 1A, left panel). Figure 1B shows the representative &#181;CT images of the 4th lumbar in OVX mice (Figur...

Watch this Scientific Journal Video about Preparation of Herbal Medicine: Er-Xian Decoction and Er-Xian-containing Serum for In Vivo and In Vitro Experiments at JoVE.com

Preparation of Herbal Medicine: Er-Xian Decoction and Er-Xian-containing Serum for In Vivo and In Vitro Experiments

Here, we present the preparation of an er-xian decoction (EXD) in four steps&#8212;soaking, decoction, filtration, and concentration&#8212;and demonstrate the administration of a prepared EXD-containing serum to rats. These methods are applicable to the in vivo and in vitro study of herbal decoctions such as traditional Chinese medicines.

Preparation of Herbal Medicine: Er-Xian Decoction and Er-Xian-containing Serum for In Vivo and In Vitro Experiments

Traditional herbal medicine, an alternative medicine in the clinical setting, has received increased attention in recent years. Before delivery to the ...

preparation-herbal-medicine-er-xian-decoction-er-xian-containing

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10.9K Views.  Shanghai University of Traditional Chinese Medicine. Here, we present the preparation of an er-xian decoction (EXD) in four steps—soaking, decoction, filtration, and concentration—and demonstrate the administration of a prepared EXD-containing serum to rats. These methods are applicable to the in vivo and in vitro study of herbal decoctions such as traditional Chinese medicines.

Video: Preparation of Herbal Medicine: Er-Xian Decoction and Er-Xian-containing Serum for In Vivo and In Vitro Experiments

In vivo 19F MRI for Cell Tracking

In vivo 19F MRI allows quantitative cell tracking without the use of ionizing radiation. It is a noninvasive technique that can be applied to humans. Here, we describe a general protocol for cell labeling, imaging, and image processing. The technique is applicable to various cell types and animal models, although here we focus on a typical mouse model for tracking murine immune cells. The most important issues for cell labeling are described, as these are relevant to all models. Similarly, key imaging parameters are listed, although the details will vary depending on the MRI system and the individual setup. Finally, we include an image processing protocol for quantification. Variations for this, and other parts of the protocol, are assessed in the Discussion section. Based on the detailed procedure described here, the user will need to adapt the protocol for each specific cell type, cell label, animal model, and imaging setup. Note that the protocol can also be adapted for human use, as long as clinical restrictions are met.

In vivo 19F MRI for Cell Tracking

We describe a general protocol for in vivo cell tracking using MRI in a mouse model with ex vivo labeled cells. A typical protocol for cell labeling, image acquisition processing and quantification is included.

In vivo 19F MRI allows quantitative cell tracking without the use of ionizing radiation. It is a noninvasive technique that can be applied to humans. ...

Carotid Artery Infusions for Pharmacokinetic and Pharmacodynamic Analysis of Taxanes in Mice

When proposing the use of a drug, drug combination, or drug delivery into a novel system, one must assess the pharmacokinetics of the drug in the study model. As the use of mouse models are often a vital step in preclinical drug discovery and drug development1-8, it is necessary to design a system to introduce drugs into mice in a uniform, reproducible manner. Ideally, the system should permit the collection of blood samples at regular intervals over a set time course. The ability to measure drug concentrations by mass-spectrometry, has allowed investigators to follow the changes in plasma drug levels over time in individual mice1, 9, 10. In this study, paclitaxel was introduced into transgenic mice as a continuous arterial infusion over three hours, while blood samples were simultaneously taken by retro-orbital bleeds at set time points. Carotid artery infusions are a potential alternative to jugular vein infusions, when factors such as mammary tumors or other obstructions make jugular infusions impractical. Using this technique, paclitaxel concentrations in plasma and tissue achieved similar levels as compared to jugular infusion. In this tutorial, we will demonstrate how to successfully catheterize the carotid artery by preparing an optimized catheter for the individual mouse model, then show how to insert and secure the catheter into the mouse carotid artery, thread the end of the catheter out through the back of the mouse&#8217;s neck, and hook the mouse to a pump to deliver a controlled rate of drug influx. Multiple low volume retro-orbital bleeds allow for analysis of plasma drug concentrations over time.

This method was developed with the goal of delivering a steady drug solution via the carotid artery, to assess the pharmacokinetics of novel drugs in mouse models.

When proposing the use of a drug, drug combination, or drug delivery into a novel system, one must assess the pharmacokinetics of the drug in the study ...

Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo

Due to the high level of heterogeneity and mutations inherent in human cancers, single agent therapies, or combination regimens which target the same pathway, are likely to fail. Emphasis must be placed upon the inhibition of pathways that are responsible for intrinsic and/or adaptive resistance to therapy. An active field of investigation is the development and testing of DNA repair inhibitors that promote the action of, and prevent resistance to, commonly used chemotherapy and radiotherapy. We used a novel protocol to evaluate the effectiveness of BRCA2 inhibition as a means to sensitize tumor cells to the DNA damaging drug cisplatin. Tumor cell metabolism (acidification and respiration) was monitored in real-time for a period of 72 hr to delineate treatment effectiveness on a minute by minute basis. In combination, we performed an assessment of metastatic frequency using a chicken embryo chorioallantoic membrane (CAM) model of extravasation and invasion. This protocol addresses some of the weaknesses of commonly used in vitro and in vivo methods to evaluate novel cancer therapy regimens. It can be used in addition to common methods such as cell proliferation assays, cell death assays, and in vivo murine xenograft studies, to more closely discriminate amongst candidate targets and agents, and select only the most promising candidates for further development.

Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo

Here, real-time monitoring of tumor cell metabolism, combined with an in vivo chicken embryo chorio-allantoic membrane (CAM) model of metastasis, are used to evaluate novel anti-cancer targets/agents for their ability to sensitize tumor cells to DNA damaging chemotherapeutics.

Due to the high level of heterogeneity and mutations inherent in human cancers, single agent therapies, or combination regimens which target the same ...

Validation of Nanobody and Antibody Based In Vivo Tumor Xenograft NIRF-imaging Experiments in Mice Using Ex Vivo Flow Cytometry and Microscopy

This protocol outlines the steps required to perform ex vivo validation of in vivo near-infrared fluorescence (NIRF) xenograft imaging experiments in mice using fluorophore labelled nanobodies and conventional antibodies.
First we describe how to generate subcutaneous tumors in mice, using antigen-negative cell lines as negative controls and antigen-positive cells as positive controls in the same mice for intraindividual comparison. We outline how to administer intravenously near-infrared fluorophore labelled (AlexaFluor680) antigen-specific nanobodies and conventional antibodies. In vivo imaging was performed with a small-animal NIRF-Imaging system. After the in vivo imaging experiments the mice were sacrificed. We then describe how to prepare the tumors for parallel ex vivo analyses by flow cytometry and fluorescence microscopy to validate in vivo imaging results.
The use of the near-infrared fluorophore labelled nanobodies allows for non-invasive same day imaging in vivo. Our protocols describe the ex vivo quantification of the specific labeling efficiency of tumor cells by flow cytometry and analysis of the distribution of the antibody constructs within the tumors by fluorescence microscopy. Using near-infrared fluorophore labelled probes allows for non-invasive, economical in vivo imaging with the unique ability to exploit the same probe without further secondary labelling for ex vivo validation experiments using flow cytometry and fluorescence microscopy.

Validation of Nanobody and Antibody Based In Vivo Tumor Xenograft NIRF-imaging Experiments in Mice Using Ex Vivo Flow Cytometry and Microscopy

This protocol outlines the steps required to perform ex vivo validation of in vivo near-infrared fluorescence xenograft imaging experiments in mice using fluorophore labelled nanobodies and conventional antibodies.

This protocol outlines the steps required to perform ex vivo validation of in vivo near-infrared fluorescence (NIRF) xenograft imaging experiments in mice ...

Intrauterine Telemetry to Measure Mouse Contractile Pressure In Vivo

A complex integration of molecular and electrical signals is needed to transform a quiescent uterus into a contractile organ at the end of pregnancy. Despite the discovery of key regulators of uterine contractility, this process is still not fully understood. Transgenic mice provide an ideal model in which to study parturition. Previously, the only method to study uterine contractility in the mouse was ex vivo isometric tension recordings, which are suboptimal for several reasons. The uterus must be removed from its physiological environment, a limited time course of investigation is possible, and the mice must be sacrificed. The recent development of radiometric telemetry has allowed for longitudinal, real-time measurements of in vivo intrauterine pressure in mice. Here, the implantation of an intrauterine telemeter to measure pressure changes in the mouse uterus from mid-pregnancy until delivery is described. By comparing differences in pressures between wild type and transgenic mice, the physiological impact of a gene of interest can be elucidated. This technique should expedite the development of therapeutics used to treat myometrial disorders during pregnancy, including preterm labor.

Intrauterine Telemetry to Measure Mouse Contractile Pressure In Vivo

This manuscript provides a protocol for implanting telemeters in the mouse for the purpose of measuring intrauterine pressures during pregnancy.

A complex integration of molecular and electrical signals is needed to transform a quiescent uterus into a contractile organ at the end of pregnancy. ...

Depletion of Mouse Cells from Human Tumor Xenografts Significantly Improves Downstream Analysis of Target Cells

The use of in vitro cell line models for cancer research has been a useful tool. However, it has been shown that these models fail to reliably mimic patient tumors in different assays1. Human tumor xenografts represent the gold standard with respect to tumor biology, drug discovery, and metastasis research 2-4. Tumor xenografts can be derived from different types of material like tumor cell lines, tumor tissue from primary patient tumors4 or serially transplanted tumors. When propagated in vivo, xenografted tissue is infiltrated and vascularized by cells of mouse origin. Multiple factors such as the tumor entity, the origin of xenografted material, growth rate and region of transplantation influence the composition and the amount of mouse cells present in tumor xenografts. However, even when these factors are kept constant, the degree of mouse cell contamination is highly variable.
Contaminating mouse cells significantly impair downstream analyses of human tumor xenografts. As mouse fibroblasts show high plating efficacies and proliferation rates, they tend to overgrow cultures of human tumor cells, especially slowly proliferating subpopulations. Mouse cell derived DNA, mRNA, and protein components can bias downstream gene expression analysis, next-generation sequencing, as well as proteome analysis 5. To overcome these limitations, we have developed a fast and easy method to isolate untouched human tumor cells from xenografted tumor tissue. This procedure is based on the comprehensive depletion of cells of mouse origin by combining automated tissue dissociation with the benchtop tissue dissociator and magnetic cell sorting. Here, we demonstrate that human target cells can be can be obtained with purities higher than 96% within less than 20 min independent of the tumor type.

Human tumor xenografts are vascularized and infiltrated by cells of mouse origin during the growth phase in vivo. To circumvent the bias caused by these contaminating cells during downstream analysis, we developed a method allowing for comprehensive depletion of all mouse cells by magnetic cell sorting.

The use of in vitro cell line models for cancer research has been a useful tool. However, it has been shown that these models fail to reliably mimic ...

Optimized Analysis of In Vivo and In Vitro Hepatic Steatosis

Establishing a system of procedures to qualitatively and quantitatively characterize in vivo and in vitro hepatic steatosis is important for metabolic study in the liver. Here, numerous assays are described to comprehensively measure the phenotype and parameters of hepatic steatosis in mouse and hepatocyte models. 
Combining the physiological, histological, and biochemical methods, this system can be used to assess the progress of hepatic steatosis. In vivo, the measurements of body weight and nuclear magnetic resonance (NMR) provide a general understanding of mice in a non-invasive manner. Hematoxylin and Eosin (H&amp;E) and Oil Red O staining determine the histological morphology and lipid deposition of liver tissue under nutrient overload conditions, such as high-fat diet feeding. Next, the total lipid contents are isolated by chloroform/methanol extraction, which are followed by a biochemical analysis for triglyceride and cholesterol. Moreover, mouse primary hepatocytes are treated with high glucose plus insulin to stimulate lipid accumulation, an efficient in vitro model to mimic diet-induced hyperglycemia and hyperinsulinemia in vivo. Then, the lipid deposition is measured by Oil Red O staining and chloroform/methanol extraction. Oil Red O staining determines intuitive hepatic steatotic phenotypes, while the lipid extraction analysis determines the parameters that can be analyzed statistically. The present protocols are of interest to scientists in the fields of fatty liver diseases, insulin resistance, and type 2 diabetes.

Optimized Analysis of In Vivo and In Vitro Hepatic Steatosis

Here, optimized methods to generate in vivo and in vitro models of hepatic steatosis and to analyze the steatotic phenotypes and related physiological parameters are described.

Establishing a system of procedures to qualitatively and quantitatively characterize in vivo and in vitro hepatic steatosis is important for metabolic ...

Preparation and In Vitro Characterization of Magnetized miR-modified Endothelial Cells

To date, the available surgical and pharmacological treatments for cardiovascular diseases (CVD) are limited and often palliative. At the same time, gene and cell therapies are highly promising alternative approaches for CVD treatment. However, the broad clinical application of gene therapy is greatly limited by the lack of suitable gene delivery systems. The development of appropriate gene delivery vectors can provide a solution to current challenges in cell therapy. In particular, existing drawbacks, such as limited efficiency and low cell retention in the injured organ, could be overcome by appropriate cell engineering (i.e., genetic) prior to transplantation. The presented protocol describes the efficient and safe transient modification of endothelial cells using a polyethyleneimine superparamagnetic magnetic nanoparticle (PEI/MNP)-based delivery vector. Also, the algorithm and methods for cell characterization are defined. The successful intracellular delivery of microRNA (miR) into human umbilical vein endothelial cells (HUVECs) has been achieved without affecting cell viability, functionality, or intercellular communication. Moreover, this approach was proven to cause a strong functional effect in introduced exogenous miR. Importantly, the application of this MNP-based vector ensures cell magnetization, with accompanying possibilities of magnetic targeting and non-invasive MRI tracing. This may provide a basis for magnetically guided, genetically engineered cell therapeutics that can be monitored non-invasively with MRI.

Preparation and In Vitro Characterization of Magnetized miR-modified Endothelial Cells

This manuscript describes the efficient, non-viral delivery of miR to endothelial cells by a PEI/MNP vector and their magnetization. Thus, in addition to genetic modification, this approach allows for magnetic cell guidance and MRI detectability. The technique can be used to improve the characteristics of therapeutic cell products.

To date, the available surgical and pharmacological treatments for cardiovascular diseases (CVD) are limited and often palliative. At the same time, gene ...

In Vitro and In Vivo Detection of Mitophagy in Human Cells, C. Elegans, and Mice

Mitochondria are the powerhouses of cells and produce cellular energy in the form of ATP. Mitochondrial dysfunction contributes to biological aging and a wide variety of disorders including metabolic diseases, premature aging syndromes, and neurodegenerative diseases such as Alzheimer's disease (AD) and Parkinson's disease (PD). Maintenance of mitochondrial health depends on mitochondrial biogenesis and the efficient clearance of dysfunctional mitochondria through mitophagy. Experimental methods to accurately detect autophagy/mitophagy, especially in animal models, have been challenging to develop. Recent progress towards the understanding of the molecular mechanisms of mitophagy has enabled the development of novel mitophagy detection techniques. Here, we introduce several versatile techniques to monitor mitophagy in human cells, Caenorhabditis elegans (e.g., Rosella and DCT-1/ LGG-1 strains), and mice (mt-Keima). A combination of these mitophagy detection techniques, including cross-species evaluation, will improve the accuracy of mitophagy measurements and lead to a better understanding of the role of mitophagy in health and disease.

In Vitro and In Vivo Detection of Mitophagy in Human Cells, C. Elegans, and Mice

Mitophagy, the process of clearing damaged mitochondria, is necessary for mitochondrial homeostasis and health maintenance. This article presents some of the latest mitophagy detection methods in human cells, Caenorhabditis elegans, and mice.

Mitochondria are the powerhouses of cells and produce cellular energy in the form of ATP. Mitochondrial dysfunction contributes to biological aging and a ...

Preparation Of Gushukang (GSK) Granules for In Vivo and In Vitro Experiments

Traditional Chinese herbal medicine plays a role as an alternative method in treating many diseases, such as postmenopausal osteoporosis (POP). Gushukang (GSK) granules, a marketed prescription in China, have bone-protective effects in treating POP. Before administration to the body, one standard preparation procedure is commonly required, which aims to promote the release of active constituents from raw herbs and enhance the pharmacological effects as well as therapeutic outcomes. This study proposes a detailed protocol for using GSK granules in in vivo and in vitro experimental assays. The authors first provide a detailed protocol to calculate the animal-appropriate dosages of granules for in vivo investigation: weighing, dissolving, storage, and administration. Second, this article describes protocols for micro-CT scanning and the measurement of bone parameters. Sample preparation, protocols for running the micro-CT machine and quantification of bone parameters were evaluated. Third, serum-containing GSK granules are prepared, and drug-containing serum is extracted for in vitro osteoclastogenesis and osteoblastogenesis. GSK granules were intragastrically administered twice per day to rats for three consecutive days. Blood was then collected, centrifuged, inactivated, and filtered. Finally, serum was diluted and used for performing osteoclastogenesis and osteoblastogenesis. The protocol described here can be considered a reference for pharmacological investigations of herbal prescription medicines, such as granules.

Preparation Of Gushukang GSK Granules for In Vivo and In Vitro Experiments

This article provides a detailed protocol for preparing a working solution of Gushukang granules for animal studies and GSK granule containing serum for in vitro experiments. This protocol can be applied to pharmacological investigations of herbal medicines as well as prescriptions for both in vivo and in vitro experiments.

Traditional Chinese herbal medicine plays a role as an alternative method in treating many diseases, such as postmenopausal osteoporosis (POP). Gushukang ...

Preparation of Herbal Medicine: Er-Xian Decoction and Er-Xian-containing Serum for In Vivo and In Vitro Experiments

Summary

Explore More Videos

Chapters in this video

In vivo ¹⁹F MRI for Cell Tracking

Carotid Artery Infusions for Pharmacokinetic and Pharmacodynamic Analysis of Taxanes in Mice

Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo

Validation of Nanobody and Antibody Based In Vivo Tumor Xenograft NIRF-imaging Experiments in Mice Using Ex Vivo Flow Cytometry and Microscopy

Intrauterine Telemetry to Measure Mouse Contractile Pressure In Vivo

Depletion of Mouse Cells from Human Tumor Xenografts Significantly Improves Downstream Analysis of Target Cells

Optimized Analysis of In Vivo and In Vitro Hepatic Steatosis

Preparation and In Vitro Characterization of Magnetized miR-modified Endothelial Cells

In Vitro and In Vivo Detection of Mitophagy in Human Cells, C. Elegans, and Mice

Preparation Of Gushukang (GSK) Granules for In Vivo and In Vitro Experiments