The MTMR14 Knockout Raji Polyclonal Cells product comprises a CRISPR/Cas9-edited polyclonal knockout cell population, derived from the Raji human B lymphocyte line, with targeted disruption of the MTMR14 gene. This polyclonal pool provides a genetically diverse loss-of-function model ideal for investigating MTMR14-dependent processes in a population context, circumventing potential biases introduced by single-cell cloning.
Raji is a widely utilized Burkitt??s lymphoma B cell line that models key features of mature B lymphocytes, including surface immunoglobulin expression and antigen presentation capabilities. This suspension-adapted line is extensively applied in immunological and cancer research, offering a tractable platform for studying B cell signaling, autophagy regulation, and therapeutic antibody responses. The MTMR14 knockout in Raji cells therefore enables the exploration of lipid phosphatase functions directly within a relevant lymphoid malignancy background.
MTMR14 encodes a myotubularin-related lipid phosphatase that hydrolyzes PI3P and PI(3,5)P2, thereby serving as a negative regulator of autophagy by suppressing autophagosome biogenesis. Its activity is regulated by mTORC1 within the PI3K/AKT/mTORC1 signaling axis and nutrient status, and it interfaces with the VPS34 complex and ATG proteins, including ATG14 and BECN1. By depleting PI3P, MTMR14 modulates ULK1 complex activation, WIPI2 puncta formation, and LC3 lipidation, while also impacting endosomal trafficking through ESCRT components. Consequently, MTMR14 knockout leads to increased autophagic flux, accumulation of autophagic substrates, and altered PI3P-dependent membrane dynamics.
In Raji B lymphoma cells, autophagy often supports survival and drug resistance, making the MTMR14 knockout a valuable tool for dissecting autophagy dependence in a B-cell malignancy context. Elevated PI3P levels from MTMR14 loss may sensitize cells to lysosomal stress or chemotherapeutic agents, providing a model for drug sensitivity testing. This polyclonal knockout population also offers insights into centronuclear myopathy and autophagy-related disorders, where lipid phosphatase dysfunction is implicated. The B cell context further allows studies of autophagy??s role in antigen presentation and tumor immunity, leveraging the Raji line??s immunological properties.
Researchers can employ this model for autophagy mechanism studies, lysosomal biology investigations, and drug sensitivity screening. Typical assays include Western blotting for LC3-II and p62 to monitor autophagic flux, chloroquine-based flux assays to block lysosomal degradation, immunofluorescence detection of WIPI2 puncta as an early autophagy marker, RT-qPCR for autophagy gene expression, and flow cytometry for apoptosis. These complementary approaches enable comprehensive dissection of MTMR14 function across multiple cellular contexts. For further technical details or custom inquiries, please contact Ascent Research.
