KHOS/NP Xenograft Model Overview
The KHOS/NP xenograft model is derived from a human osteosarcoma cell line, KHOS/NP, established from a patient with high-grade osteosarcoma, a rare and aggressive form of bone cancer. Osteosarcoma is the most common malignant bone tumor in children and adolescents, characterized by its rapid growth, metastasis to the lungs, and resistance to standard therapies. The KHOS/NP xenograft model is particularly valuable for studying the molecular mechanisms driving osteosarcoma, tumor progression, and metastasis. Given its aggressive nature and ability to replicate key features of osteosarcoma, including bone matrix production and metastatic spread, the KHOS/NP model is widely used to evaluate novel therapeutic strategies, including chemotherapy, targeted therapies, and immunotherapies.
Request a Custom Quote for KHOS/NP Xenograft ModelBiological and Molecular Characteristics
KHOS/NP cells are characterized by their mesenchymal origin and are capable of producing osteoid, a bone matrix characteristic of osteosarcoma. The model is particularly relevant for studying high-grade osteosarcoma due to its ability to replicate the tumor’s key features, including rapid growth and the production of bone-like material. KHOS/NP cells show amplification of the MYC oncogene, which plays a key role in regulating cell growth and survival, and mutations in the p53 tumor suppressor gene, which contributes to resistance to apoptosis and uncontrolled cell proliferation. In addition to these genetic features, KHOS/NP cells exhibit dysregulated signaling in pathways such as PI3K/AKT and MAPK/ERK, which promote cell survival, proliferation, and metastasis. These molecular alterations make the KHOS/NP xenograft model particularly useful for testing therapies targeting these pathways and for evaluating the mechanisms of chemotherapy resistance in osteosarcoma.
| Marker | Expression Level | Function |
|---|---|---|
| MYC | High | Oncogene involved in cell growth and survival |
| p53 | Mutated | Tumor suppressor gene involved in apoptosis |
| Osteoid | High | Bone matrix produced by tumor cells |
| PI3K/AKT pathway | Dysregulated | Promotes cell survival and proliferation |
In Vivo Model Development and Tumorigenicity
The KHOS/NP xenograft model is typically established by subcutaneously implanting KHOS/NP cells into immunocompromised mice, such as NOD/SCID or NSG mice. Upon implantation, the cells form tumors that closely resemble human osteosarcoma, including high cellularity, the presence of osteoid, and significant vascularization due to the tumor’s angiogenic properties. KHOS/NP xenografts also show areas of necrosis, indicative of rapid tumor growth. This model is particularly useful for evaluating chemotherapy agents commonly used in osteosarcoma treatment, such as methotrexate, doxorubicin, and cisplatin, and for studying the molecular mechanisms behind drug resistance.
In addition to subcutaneous implantation, orthotopic implantation of KHOS/NP cells into the bone of immunocompromised mice can be performed. This orthotopic model more accurately mimics the natural growth and invasion of osteosarcoma, as the cells grow directly in the bone, allowing for the study of local invasion, metastasis to distant organs such as the lungs, and the effects of treatment on the tumor microenvironment. The ability of KHOS/NP cells to replicate osteosarcoma bone involvement and metastasis to the lungs makes it an ideal model for testing therapies targeting both primary tumors and metastatic lesions.
Request a Custom Quote for KHOS/NP Xenograft ModelHistopathology and Immunohistochemical Profile
Histopathological analysis of KHOS/NP xenografts reveals the characteristic features of osteosarcoma, including the production of osteoid and the presence of malignant cells with abundant cytoplasm and irregular nuclear morphology. The tumors exhibit significant mitotic activity and areas of necrosis, indicative of the aggressive nature of the disease. Immunohistochemical staining of KHOS/NP xenografts shows strong expression of osteoid, confirming the bone matrix production characteristic of osteosarcoma. Additionally, MYC and p53 are highly expressed in the tumors, consistent with the genetic alterations observed in the model. The tumors also exhibit elevated levels of phosphorylated AKT, indicating activation of the PI3K/AKT signaling pathway, which promotes cell survival and resistance to chemotherapy. CD31 staining reveals significant angiogenesis within the tumors, highlighting the importance of blood vessel formation in supporting tumor growth.
Preclinical Applications and Drug Response
The KHOS/NP xenograft model is widely used to evaluate the efficacy of various therapeutic agents for osteosarcoma, including chemotherapy drugs such as methotrexate, doxorubicin, and cisplatin, which are part of the standard treatment regimen for high-grade osteosarcoma. The model is particularly valuable for testing new therapies aimed at overcoming drug resistance, as KHOS/NP xenografts can develop resistance to chemotherapy over time. The model is also useful for evaluating targeted therapies, particularly those that inhibit key signaling pathways, such as the PI3K/AKT and MAPK/ERK pathways, which contribute to the growth and survival of osteosarcoma cells.
In addition to chemotherapy and targeted therapies, the KHOS/NP xenograft model is increasingly used to evaluate the potential of immunotherapies, including immune checkpoint inhibitors and monoclonal antibodies targeting tumor-specific antigens. The model’s ability to replicate the aggressive nature of osteosarcoma, including its bone matrix production and metastatic potential, makes it an ideal system for investigating new treatment strategies. Furthermore, the ability of KHOS/NP cells to metastasize to the lungs provides an excellent platform for testing therapies that target metastatic disease, which is a critical challenge in osteosarcoma treatment.
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To request the KHOS/NP xenograft model for your preclinical studies, please use the form below. A customized quote and additional model specifications will be provided upon inquiry.
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