MCF-7 Cell Line Derived Xenograft
Research using MCF7 cells has contributed significantly to our understanding of breast cancer biology. For example, MCF7 cells have been used to study the role of various signaling pathways, such as the estrogen receptor (ER) and phosphatidylinositol 3-kinase (PI3K)/AKT/mTOR pathways, in the development and progression of breast cancer. Additionally, MCF7 cells have been used to screen for potential anticancer agents, including chemotherapy drugs and targeted therapies. Furthermore, MCF7 cells have been used to study the mechanisms underlying drug resistance in breast cancer. Studies have shown that resistance to chemotherapy drugs such as tamoxifen can arise due to alterations in the ER signaling pathway, drug metabolism, and drug efflux pumps. Understanding the mechanisms of drug resistance in MCF7 cells has led to the development of combination therapies and targeted therapies that can overcome drug resistance in breast cancer. Overall, MCF7 cells have been an important tool in breast cancer research and have provided valuable insights into the molecular mechanisms underlying breast cancer development and progression, as well as potential therapeutic targets for the treatment of this disease.
Studies using MCF7 xenografts have contributed significantly to our understanding of breast cancer biology and have helped identify potential therapeutic targets for the treatment of breast cancer. For example, MCF7 xenografts have been used to evaluate the efficacy of various chemotherapy drugs, such as taxanes and anthracyclines, in reducing tumor growth and improving survival. Additionally, MCF7 xenografts have been used to evaluate the efficacy of targeted therapies, such as hormone therapies that block the estrogen receptor (ER) or HER2-targeted therapies, in treating breast cancer. The MCF7 cell line derived xenograft (CDX) model is used to investigate deregulation of apoptosis, migration and proliferation. Breast cancer cell lines, such as MCF-7, are utilized in preclinical studies given that they share the same features (i.e. genetics) as in the original tumors from which they arise. The MCF-7 CDX model lends itself to studies involving induction of apoptosis using docetaxel, and inhibition of migration and invasion by the introduction of caveolin-1.
|MCF-7||ER+, PR+/-, HER2–, p53(wt)|
|Metastatic Models (Breast)||4T1|
|Non-Metastatic Models (Breast)||BT-474, HS578T, KPL-4, MCF-7, MDA-MB-157, MDA-MB-231, MDA-MB-453, MDA-MB-468, T-47D|
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MCF7 Xenograft Model
What is a Xenograft?
Development of an anti-cancer therapeutic requires intense, well planned studies that follow a streamlined path for success. Primary studies are performed in an in vitro setting that allows for high throughput screening and analysis of multiple compounds of interest. This method enables a focused compound screening approach of multiple cell lines within a specific cancer type, or a divergent approach across a broad range of cancer types. Ultimately, in vitro screening results need to be confirmed in an animal model due to in vitro inadequacies of cells cultured on plastic, as this method is far removed from the microenvironment of a tumor.
As the logical next step in therapeutic development is the administration of the test compound in a living animal, a cell line derived xenograft model (CDX) is created by inoculating human cancer cell lines in test animals. The injected cell lines grow into established tumors, thus, permitting efficacy studies of the test compounds. An alternative to CDX models is the patient derived tumor xenograft (PDX) which consists of implanting human tumor fragments directly in a mouse model. The PDX model avoids concerns with the CDX model since the tumor is never grown on plastic and there is no selection for single cell populations. In contrary to CDX models, the ideology of PDX models is to maintain the cell population, structure and stroma of the initial tumor.
Why use Xenograft Models?
Cell line derived xenograft (CDX) models or patient derived tumor xenograft (PDX) models enable a larger realm of parameters to be studied not capable with in vitro studies. The complete animal system model expands the scope of studies available to include the effect of test compounds on pharmacokinetics (PK), pharmacodynamics (PD), alternate routes of delivery, inhibition of metastasis, CBCs, dosing regimens, dose levels, etc. However, one of the major drawbacks of CDX and PDX models is that the human cancer cell lines or human patient derived tumors must be implanted in immunocompromised mice in order to bypass the graft versus host rejection by the animal. With the increasing focus of the immune systems role in the recognition and elimination of tumor cells (i.e. immunotherapy), major consideration must be taken into account during experimental concept design of the limitation of checkpoint inhibitors or desired immune response involvement in tumor efficacy. Similarly, any tumor regression after treatment with a test compound in these models will not exhibit the potential complement cascade or innate immune response of the injected therapeutic in humans.
What we offer?
Our in vivo xenograft service department evaluates the efficacy of preclinical and clinical cancer therapeutics utilizing more than 90 validated immunocompromised xenograft mouse models. The value of utilizing our xenograft service department is highlighted by the ability to completely characterize the efficacy, dose regimen, dose levels and optimal combination ratios of lead compounds for cancer, obesity, diabetes, infections and immunology research.
During the design and execution of the xenograft study, our scientists will communicate with and assist the client’s decisions regarding these details:
- Study Group Formation: classification of mice by body weight, tumor size or other parameters
- Cancer Cell Line: use of in-house cell lines or utilization of customer-provided cell lines
- Tumor Implantation: intraperitoneal, subcutaneous, submuscular or intravenous
- Test Compound Administration: intraperitoneal, intravenous, tail vein, subcutaneous, topical, oral gavage, osmotic pumps or subcutaneous drug pellets
- Sample Collection: Tumors/tissues can be fixed in 10% NBF, frozen in liquid N2 or stabilized in RNAlater; blood chemistry analysis can be performed throughout the in-life portion of study
Our vivarium is designed such that it enables cost-effective and first-rate preclinical effectiveness testing services. All animal handling and maintenance is regulated following IACUC guidelines. Our facility consists of the following:
- IACUC-regulated and GLP-compliant
- Controlled, limited access lab areas
- Disposable cages
- Sterile food and water
- SPF (specific pathogen-free) animals to guarantee pathogens do not interfere with the experiment
- Established animal handling and micro-injection equipment systems, including an animal health observation program
- All studies follow pre-approved SOPs
Our staff understands that each proposed study design is unique and customized to the client’s needs. We also recognize the importance of the delivered results as being confidential, highly reproducible and that 100% of the intellectual property (IP) is owned by the client.
In order to receive a quote for your xenograft study, email us the specific details listed below in order to efficiently begin the study quote process:
- Cancer cell line(s) used in the study
- Number (n=) of animals in each study group
- Number of study groups and control groups
- Tumor implantation route
- Administration route of test compound
- Species of immunocompromised mouse (e.g. NOD/SCID, athymic Nude)
- Treatment and dose schedule
- Study endpoint and analysis (e.g. tumor growth delay, PK/PD, survival, toxicity, drug combinations)
- Samples collected: tumor and tissues to be collected, including storage condition (e.g. snap frozen, RNAlater, 10% NBF, nucleic acid isolation)