{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,22]],"date-time":"2026-08-22T05:23:48Z","timestamp":1787376228595,"version":"build-2736575974"},"reference-count":181,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T00:00:00Z","timestamp":1787184000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cells"],"abstract":"<jats:p>AMP-activated protein kinase (AMPK) is a highly conserved serine\/threonine kinase that integrates energetic, nutrient, hormonal, redox, and stress signals to coordinate cellular and whole-body energy homeostasis. Although AMPK was initially characterized primarily as a sensor of changes in cellular AMP\/ATP ratios, recent studies have revealed additional layers of regulation involving upstream kinases, post-translational modifications, heterotrimeric isoform composition, subcellular compartmentalization, and tissue-specific signaling. In this review, we provide an updated overview of the molecular mechanisms regulating AMPK activity, its major downstream metabolic and homeostatic pathways, its roles in metabolic, cardiovascular, neurodegenerative, muscular, malignant, and age-associated diseases, and current strategies for pharmacological AMPK modulation. We compare indirect activators, including metformin and naturally derived compounds, with direct small-molecule agonists targeting the allosteric drug and metabolite (ADaM) site, and emerging activators that selectively engage specific AMPK isoforms, tissues, or subcellular pools. We also discuss endogenous AMPK regulators, including microbiota-derived metabolites, and critically evaluate the potential adverse consequences of sustained or systemic AMPK activation. Collectively, current evidence indicates that the therapeutic effects of AMPK activation are highly dependent on tissue, heterotrimer composition, subcellular localization, disease stage, and the magnitude and duration of activation. Rather than indiscriminate systemic activation, future AMPK-directed therapies are therefore likely to benefit from isoform-, tissue-, and compartment-selective approaches that preferentially engage disease-relevant AMPK signaling while minimizing off-target effects. Continued characterization of AMPK signaling specificity and the development of selective pharmacological modulators should facilitate the translation of AMPK biology into more precise therapies for metabolic and other chronic diseases.<\/jats:p>","DOI":"10.3390\/cells15161503","type":"journal-article","created":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T16:05:19Z","timestamp":1787241919000},"page":"1503","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["AMPK Therapy\u2014A Little Goes A Long Way"],"prefix":"10.3390","volume":"15","author":[{"given":"Hannah","family":"Ceballos","sequence":"first","affiliation":[{"name":"Department of Diabetes Complications, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA"},{"name":"Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope, Duarte, CA 91010, USA"},{"name":"Irell & Manella Graduate School of Biomedical Science, City of Hope National Medical Center, Duarte, CA 91010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eryun","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Diabetes Complications, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA"},{"name":"Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope, Duarte, CA 91010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3735-9466","authenticated-orcid":false,"given":"Wendong","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Diabetes Complications, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA"},{"name":"Arthur Riggs Diabetes and Metabolism Research Institute, City of Hope, Duarte, CA 91010, USA"},{"name":"Irell & Manella Graduate School of Biomedical Science, City of Hope National Medical Center, Duarte, CA 91010, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1038\/nrm.2017.95","article-title":"AMPK: Guardian of metabolism and mitochondrial homeostasis","volume":"19","author":"Herzig","year":"2018","journal-title":"Nat. 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