Name: a syngeneic mouse model of metastatic renal cell carcinoma for quantitative and longitudinal assessment of preclinical therapies
Uploaded: 2017-04-12T14:00:00
Description: Watch this Scientific Journal Video about A Syngeneic Mouse Model of Metastatic Renal Cell Carcinoma for Quantitative and Longitudinal Assessment of Preclinical Therapies at JoVE.com

This work was supported by grants from the National Cancer Institute (R15CA173657 to A.W. and R01CA109446 to T.S.G.), the Simmons Cancer Institute (to A.W.), and the University of Minnestoa Climb 4 Kidney Cancer Foundation (to T.S.G.). We thank Dr. Kristin Anderson for assistance with the immunofluorescence.

The following protocol describes an experimental procedure for inducing and monitoring the growth of experimental orthotopic renal tumors and any potential spontaneous metastases. All of the following procedures are done in accordance with institutional policies and approved procedures regarding the humane use of experimental animals.
1. Maintenance of Cell Lines
<ol>
	<li>Maintain murine renal adenocarcinoma cell line, Renca, in Roswell Park Memorial Institute (RPMI) 1640 medium supplemented with 10% fetal calf...

<ol>
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We present a protocol for an orthotopic RCC mouse model. Implantation of mouse renal adenocarcinoma tumor cells into the mouse kidney provides a clinically-relevant model of mRCC. This model results in a primary tumor within the kidney and distant metastasis in the lungs, both of which are hallmarks of advanced RCC. The description presented herein is specific for the Renca cell line in immunocompetent Balb/c mice. Using this orthotopic model, we have shown that the Renca tumors are responsive to immunotherapy, demonstra...

Renal cell carcinoma (RCC) accounts for the majority of malignant kidney neoplasms and roughly 3% of all adult malignancies worldwide1,2. Due to lack of symptoms, misdiagnosis, and insufficient screening tools for RCC, almost 30% of patients will present with metastatic RCC (mRCC) at the time of diagnosis, with an additional 20-30% of patients progressing to a metastatic stage2. These cases result in ~13,500 deaths annually1,3. Though earlier detection and treatment of primary RCC has improved, the rate of RCC-related death continues to increase, suggesting that metastatic disease is largely responsible for mortality3. Therapy development for RCC has progressed over the last decade with the discovery and implementation of targeted therapies and immunotherapies. Unfortunately, progression-free survival and overall survival of advanced cases are still well under 2 years for the majority of patients4,5,6. These statistics warrant the need for further research into the identification and development of efficacious treatments for RCC. To adequately advance therapeutic interventions for mRCC, translationally-relevant pre-clinical models of the disease are first needed.
Development of a relevant and consistent model to recapitulate the human condition of advanced RCC should address several key questions: 1) Is the model anatomically relevant; 2) Does the tumor progress similarly to the human pathology; 3) Do metastases arise from the primary tumor; and 4) Can primary and metastatic tumor progression be monitored over time? Depending on the type of treatment being investigated, mouse RCC tumor cell lines, human RCC tumor cell lines, and human RCC patient-derived xenografts may be used in immunocompetent or immunodeficient mice. A host with an intact and functional immune system is required for those studies evaluating some aspect of immunotherapy, necessitating the use of the well-described Renca cell line derived from a spontaneous renal adenocarcinoma of Balb/c mice7. Most studies inject Renca cells subcutaneously (s.c.), which forms an easy-to-measure local tumor, or intravenously (i.v.) into Balb/c mice to produce experimental lung &#34;metastases&#34;8,9,10,11,12. Use of an s.c.-implanted Renca tumor to model human RCC has a number of limitations, including inaccurate innervation of vasculature13, differences in microenvironment14,15, and a lack of organ/tumor cellular communication13,16. Additionally, many s.c. tumors (especially Renca) do not metastasize to distal organs, inhibiting the study of an event that is a common clinical characteristic17. To study mRCC, Renca cells can be injected i.v. to establish tumor burden in the lungs-the primary location of metastases in RCC patients. The i.v. injection method of initiating metastatic tumors, however, does not allow the investigation of how, when, or why the cells have migrated from the primary organ (i.e., the kidney) to the distant site. A model with both primary and metastatic disease evident in the same animal is crucial to study the progression and treatment of advanced disease, especially considering that metastases are typically the cause of mortality in these patients.
Our lab has developed a murine model of mRCC that incorporates all of the features outlined above. To establish primary, orthotopic tumors, Renca cells are implanted directly into the kidney of the animal through the translucent peritoneum. A small incision in the left flank allows for visualization of the spleen (as a landmark) and the left kidney. Using a small-gauge needle, Renca tumor cells are injected directly into the kidney through the peritoneum for orthotopic implantation. Compared to other methods of implanting Renca cells below the kidney capsule18, this method of implantation allows for a higher throughput, as it is fairly non-invasive, does not require suturing, is of a low pain class, and is time-efficient when practiced.
This well-characterized model results in reproducible primary tumor burden (~ 99% take rate) in the injected kidney as well as metastatic tumor load in the lungs. The significant advantages of this model include its syngeneic nature, allowing for immunotherapy investigations; its spontaneous metastases, to study advanced disease; and its orthotopic implantation, to model the anatomical impact on disease progression and treatment. Therapies aimed at targeting RCC would greatly benefit from the utilization of this model during preclinical development.

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a syngeneic mouse model of metastatic renal cell carcinoma for quantitative and longitudinal assessment of preclinical therapies

Renal cell carcinoma (RCC) affects &#62; 60,000 people in the United States annually, and ~ 30% of RCC patients have multiple metastases at the time of diagnosis. Metastatic RCC (mRCC) is incurable, with a median survival time of only 18 months. Immune-based interventions (e.g., interferon (IFN) and interleukin (IL)-2) induce durable responses in a fraction of mRCC patients, and multikinase inhibitors (e.g., sunitinib or sorafenib) or anti-VEGF receptor monoclonal antibodies (mAb) are largely palliative, as complete remissions are rare. Such shortcomings in current therapies for mRCC patients provide the rationale for the development of novel treatment protocols. A key component in the preclinical testing of new therapies for mRCC is a suitable animal model. Beneficial features that recapitulate the human condition include a primary renal tumor, renal tumor metastases, and an intact immune system to investigate any therapy-driven immune effector responses and the formation of tumor-induced immunosuppressive factors. This report describes an orthotopic mRCC mouse model that has all of these features. We describe an intrarenal implantation technique using the mouse renal adenocarcinoma cell line Renca, followed by the assessment of tumor growth in the kidney (primary site) and lungs (metastatic site).

The successful implantation of Renca cells will result in tumor development in the kidney and metastasis to the lungs of the mice. After the excision of the tumor-bearing and the contralateral kidneys, wet tissue weights (g) were measured to demonstrate the tumor burden based on increased weight (Figure 1). Renca tumors can be identified by immunohistochemistry through cytokeratin 8 and 18 staining (Figure 2). For longitudinal studies, a luciferase-expres...

Watch this Scientific Journal Video about A Syngeneic Mouse Model of Metastatic Renal Cell Carcinoma for Quantitative and Longitudinal Assessment of Preclinical Therapies at JoVE.com

A Syngeneic Mouse Model of Metastatic Renal Cell Carcinoma for Quantitative and Longitudinal Assessment of Preclinical Therapies

Implementation of an orthotopic model of renal cell carcinoma in immunocompetent mice affords the investigator a clinically-relevant system defined by the presence of a primary renal tumor and lung metastases in the same animal. This system can be used to preclinically test a variety of treatments in vivo.

Renal cell carcinoma (RCC) affects &#62; 60,000 people in the United States annually, and ~ 30% of RCC patients have multiple metastases at the time of ...

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A Syngeneic Mouse B-Cell Lymphoma Model for Pre-Clinical Evaluation of CD19 CAR T Cells

The astonishing clinical success of CD19 chimeric antigen receptor (CAR) T-cell therapy has led to the approval of two second generation chimeric antigen ...

Intramucosal Inoculation of Squamous Cell Carcinoma Cells in Mice for Tumor Immune Profiling and Treatment Response Assessment

Head and neck squamous cell carcinoma (HNSCC) is a debilitating and deadly disease with a high prevalence of recurrence and treatment failure. To develop ...

Micromanipulation of Circulating Tumor Cells for Downstream Molecular Analysis and Metastatic Potential Assessment

Blood-borne metastasis accounts for&#160;most cancer-related deaths and involves circulating tumor cells (CTCs) that are successful in establishing new ...