The BABAM1 Knockout HT29 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout population in which the BABAM1 gene has been disrupted in the HT29 human colorectal adenocarcinoma cell line. This model enables loss-of-function studies of BABAM1 within DNA damage repair, cell cycle checkpoint control, and inflammatory signaling pathways. The polyclonal composition avoids clonal selection artifacts, providing a heterogeneous knockout background suitable for unbiased functional genomics approaches.
HT29 cells are an adherent epithelial cell line derived from a primary colorectal adenocarcinoma in a 44-year-old female in 1964. They are extensively used in cancer research for studying differentiation, drug resistance mechanisms, and signaling pathways relevant to colorectal tumor biology. The cells harbor characteristic oncogenic mutations and serve as a robust platform for investigating DNA damage responses and therapeutic sensitivities.
BABAM1 encodes a scaffold protein essential for the BRCA1-A and BRISC multiprotein complexes. In the BRCA1-A complex, BABAM1 bridges BRCA1, BARD1, RAP80, Abraxas, BRCC36, and BRE to mediate BRCA1 recruitment to DNA double-strand breaks, facilitating homologous recombination repair. Its loss impairs RAD51 loading and compromises DNA repair fidelity. Through the BRISC complex, BABAM1 participates in deubiquitinating Lys-63-linked polyubiquitin chains on signaling adaptors, thereby modulating NF-kappaB pathway activity. Upstream, BABAM1 functions downstream of ATM and ATR kinases activated by DNA damage from ionizing radiation or replication stress, positioning it at the intersection of genome maintenance and inflammatory signaling.
In the HT29 colorectal cancer context, BABAM1 knockout allows dissection of its dual roles in DNA repair and inflammation. Given the reliance of colorectal tumors on DNA damage response pathways, disruption of BABAM1 may sensitize cells to genotoxic agents and reveal synthetic lethal interactions. Moreover, altered NF-kappaB signaling via the BRISC complex could influence cytokine production and tumor microenvironment crosstalk, making this model valuable for exploring inflammation-driven cancer progression mechanisms.
This knockout model supports applications including gamma-H2AX foci immunofluorescence for DNA damage quantification, homologous recombination reporter assays, cell cycle analysis, and colony formation assays under genotoxic stress. Inflammatory readouts such as NF-kappaB luciferase reporters and cytokine ELISAs can be employed to probe BRISC-mediated deubiquitination. For further details, please reach out to Ascent Research.
