Pum2, short for PUMILIO2, is an RNA-binding protein that controls target mRNA turnover, often repressing translation by binding to target mRNAs in a sequence-specific manner [1,2]. It is involved in multiple biological processes and associated with various pathways, influencing gene expression at the post-transcriptional level, which is crucial for normal cellular function and development [1,2,5]. Genetic models, such as gene knockout (KO) mouse models, are valuable for studying its functions.

In a murine model of acute ischemic kidney injury, genetic deletion of Mff, whose mRNA translation is negatively regulated by Pum2, attenuated ischemic acute kidney injury-induced renal failure. Overexpression of Pum2 reduced ischemic AKI-mediated Mff upregulation and protected renal tubules [3]. In the AOM/DSS model, intestine-specific knockout of Pum2 (along with Pum1) in mice significantly inhibited the progression of colitis-associated cancer. Knockout or knockdown of Pum2 in human CRC cells decreased tumorigenicity and delayed G1/S transition [4].

In conclusion, Pum2 is a key post-transcriptional regulator involved in diverse biological processes. Model-based research, especially KO mouse models, has revealed its role in diseases like acute ischemic kidney injury and colorectal cancer. Understanding Pum2 provides insights into disease mechanisms and potential therapeutic targets.