Name: intra-cardiac injection of human prostate cancer cells to create a bone metastasis xenograft mouse model
Uploaded: 2022-11-04T14:30:00
Description: Watch this Scientific Journal Video about Intra-Cardiac Injection of Human Prostate Cancer Cells to Create a Bone Metastasis Xenograft Mouse Model at JoVE.com

This work is supported by grants from the National Key R&#38;D Program of China (2018YFC1704300 and 2020YFE0201600), the National Nature Science Foundation (81973877 and 82174408), the research projects within the budget of the Shanghai University of Traditional Chinese Medicine (2021LK047), and the Shanghai Collaborative Innovation Center of Industrial Transformation of Hospital TCM Preparation.

Six to eight week old male BALB/c athymic mice (n = 10) were housedin individually ventilated mice cages (5 mice/cage) in a specific-pathogen-free (SPF) animal room under the conditions of 12 h light/dark cycle, with free access to SPF feed and sterile water. Mice were adaptively fed for a week before the experiments.All animal experiments were approved by the animal welfare committee of Shanghai University of Traditional Chinese Medicine.
1. Cell preparation
<ol>
	<li>On th...

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Intra-cardiac injection of human prostate cancer cells to generate bone metastasis is an ideal mouse model for exploring the functions and mechanisms of prostate cancer bone metastasis and evaluating the therapeutic efficacy. Studies have shown that bone damage most likely occurs in the proximal tibia and the distal femur17, which may be due to their high vascularization and metabolic activity.
Since bone metastasis is a frequently observed metastatic lesion in breast c...

Prostate cancer is the most frequent cancer in men in 112 countries and ranks second for mortality in higher human development index countries1,2. Most deaths in prostate cancer patients are caused by metastasis, and about 65%-75% of the cases will develop bone metastasis3,4. Therefore, prevention and treatment of prostate cancer bone metastases are urgently needed to improve the clinical outcome of prostate cancer patients. The animal model of bone metastasis is an indispensable tool for exploring the multistage process and molecular mechanisms involved in each stage of prostate cancer bone metastasis, thus identifying therapeutic targets and developing novel therapeutics5.
The most common methods to generate experimental animal models of prostate cancer bone metastasis include the orthotopic, intra-diaphysis (such as intra-tibial), and intra-cardiac injection of prostate cancer cells. The bone metastasis model with orthotopic injection is generated by directly injecting prostate cancer cells into the prostate of a mouse6,7. This experimental animal model has very similar clinical characteristics to prostate cancer bone metastasis. However, the metastasis mainly happens in the axillary lymph node and the lung rather than in the bone8,9.The intra-tibial injection model for prostate cancer directly injects prostate cancer cells into the tibia with a hightumor formation rate in the bone (tibia)10,11; however, the bone cortex and bone marrow cavity are easily damaged. Additionally, the tibial injection method cannot stimulate the pathological process of prostate cancer bone metastasis in which the cancer cells colonize the bone through circulation. To investigate the circulation, vascular extravasation, and distant metastasis with a higher bone metastasis rate of cancer cells, an intra-cardiac injection technique has been developed by directly injecting prostate cancer cells into the left ventricle of the mouse8,12,13. This makes it a valuable animal model for bone metastasis research8. The intra-cardiac injection method shows a bone metastasis rate of about 75%9,14, much higher than the orthotopic injection method. Therefore, the intra-cardiac injection is an ideal method to generate an animal model with prostate cancer bone metastasis.
This work aims to describe the process of establishing a mouse model of prostate cancer bone metastases, allowing readers to visualize the model establishment. The current work provides detailed processes, precautions, and illustrative pictures to generate a bone metastasis xenograft model via intra-cardiac injection of human prostate cancer cells in athymic mice. This method provides an effective tool for further exploring the molecular mechanisms and the in vivo therapeutic effects of prostate cancer bone metastasis.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>1 mL syringes and needles</td>
			<td>Shandong Weigao Group Medical Polymer Co., Ltd</td>
			<td>20200411</td>
			<td>The cells were injected into the ventricles of mice</td>
		</tr>
		<tr>
			<td>Anesthesia machine</td>
			<td>Shenzhen RWD Life Technology Co., Ltd</td>
			<td>R500IP</td>
			<td>Equipment for anesthetizing mice</td>
		</tr>
		<tr>
			<td>Automatic cell counter</td>
			<td>Shanghai Simo Biological Technology Co., Ltd</td>
			<td>IC1000</td>
			<td>&#160;For counting cells</td>
		</tr>
		<tr>
			<td>BALB/c athymic mice</td>
			<td>Shanghai SLAC Laboratory Animal Co, Ltd.</td>
			<td>Male</td>
			<td>6-8 week old, male mice</td>
		</tr>
		<tr>
			<td>Bioluminescence imaging system</td>
			<td>Shanghai Baitai Technology Co., Ltd</td>
			<td>Vieworks</td>
			<td>For tracking the tumor growth and pulmonary metastasis if the injected cells are labeled by luciferase</td>
		</tr>
		<tr>
			<td>Centrifuge tube (15 mL, 50 mL)</td>
			<td>Shanghai YueNian Biotechnology Co., Ltd</td>
			<td>&#160;430790, Corning</td>
			<td></td>
		</tr>
		<tr>
			<td>EDTA solution</td>
			<td>Wuhan Xavier Biotechnology Co., Ltd</td>
			<td>G1105</td>
			<td>&#160;For decalcification of bone tissure</td>
		</tr>
		<tr>
			<td>F-12 medium</td>
			<td>Shanghai YueNian Biotechnology Co., Ltd</td>
			<td>21700075, GIBCO</td>
			<td>Cell culture medium</td>
		</tr>
		<tr>
			<td>Formalin solution</td>
			<td>Shanghai YueNian Biotechnology Co., Ltd</td>
			<td>BL539A</td>
			<td>For fixing the specimen of each mouse</td>
		</tr>
		<tr>
			<td>Isoflurane</td>
			<td>Shenzhen RWD Life Technology Co., Ltd</td>
			<td>VETEASY</td>
			<td>For anesthesia&#160;</td>
		</tr>
		<tr>
			<td>Lipofectamine 2000</td>
			<td>Shanghai YueNian Biotechnology Co., Ltd</td>
			<td>11668027, Thermo fisher</td>
			<td>Plasmid transfection reagent</td>
		</tr>
		<tr>
			<td>PC-3 cell line</td>
			<td>Cell Bank of Chinese Academy of Sciences</td>
			<td>TCHu 158</td>
			<td>Prostate cancer cell line</td>
		</tr>
		<tr>
			<td>Phosphate-buffered saline</td>
			<td>Beyotime Biotechnology</td>
			<td>ST447</td>
			<td>Wash the human osteosarcoma cells</td>
		</tr>
		<tr>
			<td>Trypsin (0.25%)</td>
			<td>Shanghai YueNian Biotechnology Co., Ltd</td>
			<td>25200056, Gibco</td>
			<td>For detaching the cells</td>
		</tr>
		<tr>
			<td>Vector (pLV-luciferase)</td>
			<td>Shanghai YueNian Biotechnology Co., Ltd</td>
			<td>VL3613</td>
			<td>Plasmid for transfection</td>
		</tr>
		<tr>
			<td>X-ray imaging system</td>
			<td>Brook (Beijing) Technology Co., Ltd</td>
			<td>FX PRO</td>
			<td>For obtaining x-ray images to detect tumor growth</td>
		</tr>
		<tr>
			<td>&#956;CT80</td>
			<td>Shenzhen Fraun Technology Service Co., Ltd</td>
			<td>Scanco Medical AG,Switzerland</td>
			<td>For detection of bone destruction. The mico-CT is equipped with 3DCalc, cone reconstruction,&#160; and &#956;CT Ray V3.4A model visualization software.</td>
		</tr>
	</tbody>
</table>

intra-cardiac injection of human prostate cancer cells to create a bone metastasis xenograft mouse model

As the most common male malignancy, prostate cancer (PC) ranks second in mortality, primarily due to a 65%-75% bone metastasis rate. Therefore, it is essential to understand the process and related mechanisms of prostate cancer bone metastasis for developing new therapeutics. For this, an animal model of bone metastasis is an essential tool. Here, we report detailed procedures to generate a bone metastasis mouse model via intra-cardiac injection of prostate cancer cells. A bioluminescence imaging system can determine whether prostate cancer cells have been accurately injected into the heart and monitor cancer cell metastasis since it has great advantages in monitoring metastatic lesion development. This model replicates the natural development of disseminated cancer cells to form micro-metastases in the bone and imitates the pathological process of prostate cancer bone metastasis. It provides an effective tool for further exploration of the molecular mechanisms and the in vivo therapeutic effects of this disease.

Bioluminescence imaging offers tremendous advantages in monitoring the metastatic lesion development for an intra-cardiac injection model. Soon after the cancer cell injection (within 24 h), bioluminescence imaging was used to visualize the cancer cells entering the general circulation (Figure 3A). Obvious bioluminescence signaling all over the body will be seen when the cancer cells are injected into the arterial circulation properly. Data from mice showing bioluminescence signals only at t...

Watch this Scientific Journal Video about Intra-Cardiac Injection of Human Prostate Cancer Cells to Create a Bone Metastasis Xenograft Mouse Model at JoVE.com

Intra-Cardiac Injection of Human Prostate Cancer Cells to Create a Bone Metastasis Xenograft Mouse Model

Here, we present a protocol for the intra-cardiac injection of human prostate cancer cells to generate a mouse model with bone metastasis lesions.

As the most common male malignancy, prostate cancer (PC) ranks second in mortality, primarily due to a 65%-75% bone metastasis rate. Therefore, it is ...

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