Ccnl1-flox Mouse

Ccnl1, also known as Cyclin L1, is a non-canonical cyclin. It is involved in multiple biological processes. Functionally, it participates in pre-mRNA splicing activities as it interacts with TFIP11 and EWSR1 which are related to the spliceosome [5]. It also plays a role in cell cycle regulation, specifically at the G2-M phase as part of the CCNL1-CDK11 complex [1].

In cancer-related research, loss-of-function experiments have shown significant results. In pancreatic cancer, knockout of Ccnl1 enhanced gemcitabine resistance by activating the ERK/AKT/STAT3 survival pathway [4]. In prostate cancer, miR-5195-3p, which targets Ccnl1, acts as a tumor suppressor, with overexpression of miR-5195-3p suppressing cell proliferation and cell cycle G1/S transition [2]. In osteosarcoma, Ccnl1 promotes cell proliferation, migration, and Adriamycin resistance through the PI3K/AKT-mTOR pathway [3].

In conclusion, Ccnl1 is crucial for pre-mRNA splicing and cell cycle regulation. Its role in cancer-related processes, such as drug resistance and tumor cell proliferation in pancreatic, prostate, and osteosarcoma cancers, has been revealed through loss-of-function studies. Understanding Ccnl1 can provide potential targets for cancer treatment.