Human Peripheral Blood CD4+ T Helper Cells (Negative Selection)

Description

Human Peripheral Blood CD4+ T Helper Cells (Negative Selection) are isolated from healthy donor peripheral blood. These cells are a subset of lymphocytes critical to adaptive immunity, orchestrating immune responses through cytokine secretion and by assisting B cells, cytotoxic T cells, and macrophages. Morphologically, they are small, round cells with a high nucleus-to-cytoplasm ratio and typically remain non-adherent in culture. CD4+ T cells express high levels of surface markers such as CD3, CD4, and lack expression of CD8 and CD14. These cells are cryopreserved immediately after isolation to maintain native phenotype and functional responsiveness. These primary cells are non-proliferative in vitro without activation and should not be subjected to repeated freeze-thaw cycles. Each lot undergoes rigorous screening and isolation procedures, and is rigorously tested to ensure it is free of contamination from HIV-1, HBV, HCV, Syphilis, Mycoplasma, Fungi, Yeast, and Bacteria.