RKN5755

Primary dorsal root ganglion sensory neuron culture isolates DRG neuronal somata from rodent or human ganglia, dissociates tissue enzymatically and mechanically, and maintains post-mitotic sensory neurons in vitro for readouts such as neurite outgrowth, immunocytochemical marker expression, calcium imaging, electrophysiology, RNA/protein analysis, or neuropeptide release assays. The method reflects peripheral sensory neuron biology because DRG neurons are primary sensory neurons whose cell bodies reside in dorsal root ganglia and whose cultured dissociated cells can retain neuronal morphology, sensory-neuron marker expression, and stimulus-responsive properties depending on the downstream assay.

Orthotopic cell-line xenograft models involve implantation of human cancer cell lines into the anatomically corresponding organ of immunodeficient mice to reproduce tumor growth within a native microenvironment, enabling more clinically relevant tumor behavior compared with subcutaneous models. These models are widely used because orthotopic placement better recapitulates tumor progression, including invasion and metastatic spread, which are often underrepresented in heterotopic implantation systems. Compared with conventional xenografts, orthotopic implantation is described as more technically complex but provides improved simulation of tumor-microenvironment interactions and metastatic behavior, making it particularly valuable for translational oncology research. Surgical orthotopic implantation approaches have been emphasized as enabling faithful reproduction of clinical cancer features, including metastasis and disease progression patterns that align with the tumor’s organ of origi