Prkd2, encoding the serine/threonine kinase protein kinase D2, is involved in multiple biological processes. It has been implicated in pathways such as Notch1, TP53/CDKN1A, and is crucial for the regulation of cell survival, proliferation, and differentiation. It also plays a role in processes like angiogenesis, insulin secretion, and T follicular helper cell differentiation [1,2,3,4,5,6]. Genetic models, especially knockout (KO) mouse models, have been valuable in studying Prkd2's functions.

In AML, knockdown of Prkd2 induced apoptosis and increased chemosensitivity, indicating it promotes AML cell proliferation and chemoresistance via the Notch1 pathway [1]. In cervical cancer, Prkd2 knockdown increased chemotherapy sensitivity through the TP53/CDKN1A pathway [2]. In mice, Prkd2 deficiency led to polyclonal hypergammaglobulinemia due to excessive T follicular helper cell development as Prkd2 and Bcl6 form a mutually inhibitory loop [3]. PRKD2 -KO rhesus monkeys and mice showed hyperinsulinemia, suggesting its role in insulin-related metabolic disorders [4].

In conclusion, Prkd2 is essential for various biological functions including cell growth, immune cell regulation, and metabolism. Studies using KO mouse models have revealed its significance in diseases such as AML, cervical cancer, and metabolic disorders, providing potential therapeutic targets for these conditions.