JNK1

c-Jun N-terminal kinase 1 (JNK1) is a mitogen-activated protein kinase (MAPK) that regulates autophagy, apoptosis, and cell proliferation across diverse tissues^[1][2]. Mechanistically, JNK1 integrates stress signals from cytokines, reactive oxygen species, and metabolic cues to modulate downstream transcription factors and cytoplasmic substrates, influencing cell survival and differentiation^[3][4]. In oligodendrocyte progenitor cells, JNK1 controls branching architecture, proliferation, and myelination, indicating a critical role in central nervous system development^[5]. Compared with JNK2 and JNK3, JNK1 uniquely mediates inflammatory responses in arthritis and contributes to hepatic steatosis under high-fat diet conditions^[6][7]. In disease models, JNK1 inhibition reduces hypoxia-induced autophagy and sensitizes cancer cells to chemotherapeutic agents, demonstrating isoform-specific therapeutic potential^[8]. The development of JNK1-selective inhibitors remains challenging due to conserved ATP-binding sites among JNK isoforms; however, computational approaches using molecular descriptors have been applied to predict candidate inhibitors targeting autophagy regulation in cancer^[9]. Collectively, JNK1 functions as a central regulator of stress signaling, with distinct contributions to metabolic, inflammatory, and neurological disease models, setting it apart from its isoform counterparts and informing experimental design for isoform-specific modulation^{[1][2][6][7][8][9]}.