CAMK1D (calcium/calmodulin-dependent protein kinase 1D) is a serine/threonine kinase that functions as a key node in calcium-responsive signaling cascades with broad physiological relevance. Primary function involves activation of CREB-dependent transcription and regulation of cellular calcium dynamics across multiple cell types 1. In immune and metabolic contexts, CAMK1D operates through distinct mechanisms: it phosphorylates AMPK at Thr172 to enhance mitophagy in prostate cancer stem cells 2, and regulates hepatic glucose metabolism by controlling CRTC2 nuclear localization 1. In kidney disease, ApoJ-activated CaMK1D signaling in proximal tubule cells restores mitochondrial function and attenuates diabetic kidney disease progression 3. CAMK1D also mediates tumor immune evasion by phosphorylating caspases (3, 6, 7) to inhibit apoptosis downstream of Fas-receptor stimulation in anti-PD-L1-refractory cancers 4. Disease relevance is substantial: CAMK1D genetic variants associate with type 2 diabetes susceptibility and gestational diabetes through epigenetic regulatory mechanisms 56, and polymorphisms correlate with both T2D and essential hypertension risk in Han Chinese populations 7. Additionally, CAMK1D upregulation drives paclitaxel-induced neuropathic pain through dysregulation of C-fiber mechanoreceptor subtypes 8. These findings establish CAMK1D as a multifunctional kinase controlling metabolic homeostasis, mitochondrial health, apoptosis, and neuropathic pain.