The PCNT Knockout Raji Polyclonal Cells consist of a heterogeneous population of Raji B lymphoblastoid cells with CRISPR/Cas9-mediated disruption of the PCNT gene, encoding the centrosomal scaffold protein pericentrin. This polyclonal knockout model provides a direct means to assess PCNT loss-of-function in a human B-cell context, eliminating the need for individual clone selection and enabling population-level functional analyses. The cells are validated for PCNT ablation and are suitable for downstream applications in centrosome biology, cancer research, and disease modeling.
The Raji host cell line is an Epstein-Barr virus (EBV)-positive B lymphoblastoid line derived from a Burkitt’s lymphoma patient, extensively utilized as a model for B-cell malignancies and immune function. Raji cells maintain high proliferation rates and are permissive to genetic editing, making them favorable for generating knockout populations. The B-cell lymphoid context provides a disease-relevant platform to study how PCNT loss impacts centrosome-driven processes, such as mitotic spindle organization and genomic integrity, which are commonly dysregulated in hematopoietic cancers.
PCNT encodes pericentrin, a large coiled-coil protein that serves as a critical scaffolding element at the centrosome, where it recruits ??-tubulin ring complexes (??-TuRC) through interactions with CEP152, CEP63, and CDK5RAP2. This scaffold facilitates microtubule nucleation and anchoring, thereby organizing the mitotic spindle and ensuring accurate chromosome segregation. Pericentrin function is regulated by cell cycle kinases including CDK1/cyclin B and PLK1, and it employs downstream effector complexes such as AKAP9 and PCM1 to coordinate centrosome maturation and primary cilium assembly. Additionally, PCNT interacts with CHK1 to participate in DNA damage response signaling, linking centrosomal integrity to genomic stability. Through these interactions, PCNT functions as a central hub connecting centrosome biology to cell cycle progression and cellular architecture.
Disruption of PCNT in Raji cells abrogates the centrosomal scaffold, leading to impaired ??-tubulin recruitment and defective microtubule nucleation. This results in aberrant mitotic spindle formation, centrosome duplication errors, and heightened genomic instability, as documented in centrosome-deficient models. In the Raji B-cell context, these mitotic defects are expected to compromise cell proliferation and survival, potentially enhancing apoptotic susceptibility or senescence. Consequently, this knockout model provides a valuable tool for exploring the interplay between centrosome dysfunction and lymphomagenesis, particularly in EBV-positive B-cell malignancies where genomic instability is a hallmark.
Researchers can employ these PCNT knockout Raji polyclonal cells to dissect mechanisms of centrosome biology, including mitotic spindle organization, ciliogenesis, and microtubule dynamics, through techniques such as immunofluorescence for centrosomal markers (e.g., ??-tubulin, PCM1) and microtubule regrowth assays. The polyclonal nature supports population-based analyses such as flow cytometry for cell cycle distribution, mitotic index determination, and apoptosis assays, as well as global transcriptomic profiling via RNA-seq to identify pathways altered by PCNT loss. This model is also applicable for drug target validation and screening compounds that interact with centrosomal pathways, and for modeling microcephalic osteodysplastic primordial dwarfism type II (MOPD II) and Seckel syndrome. The cells can be further engineered to express fluorescent reporters or utilized in co-immunoprecipitation studies to map PCNT-interacting partners. For additional information or customized applications, please contact Ascent Research.
