{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T20:33:10Z","timestamp":1792787590372,"version":"4.5.0"},"reference-count":66,"publisher":"American Society for Clinical Investigation","issue":"16","license":[{"start":{"date-parts":[[2020,8,20]],"date-time":"2020-08-20T00:00:00Z","timestamp":1597881600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Johns Hopkins Older Americans Independence Center","award":["P30 AG021334"],"award-info":[{"award-number":["P30 AG021334"]}]},{"name":"Nation Institute on Aging","award":["R01AG046441,K23 AG035005,K08 AG058483,R01 AR071618,P30-AG028747"],"award-info":[{"award-number":["R01AG046441,K23 AG035005,K08 AG058483,R01 AR071618,P30-AG028747"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,8,20]]},"abstract":"<jats:p>\n                    Chronic inflammation is associated with physical frailty and functional decline in older adults; however, the molecular mechanisms of this linkage are not understood. A mouse model of chronic inflammation showed reduced motor function and partial denervation at the neuromuscular junction. Metabolomic profiling of these mice and further validation in frail human subjects showed significant dysregulation in the tryptophan degradation pathway, including decreased tryptophan and serotonin, and increased levels of some neurotoxic kynurenines. In humans, kynurenine strongly correlated with age, frailty status, TNF-\u03b1R\n                    <jats:sub>1<\/jats:sub>\n                    and IL-6, weaker grip strength, and slower walking speed. To study the effects of elevated neurotoxic kynurenines on motor neuronal cell viability and axonal degeneration, we used motor neuronal cells treated with 3-hydroxykynurenine and quinolinic acid and observed neurite degeneration in a dose-dependent manner and potentiation of toxicity between 3-hydroxykynurenine and quinolinic acid. These results suggest that kynurenines mediate neuromuscular dysfunction associated with chronic inflammation and aging.\n                  <\/jats:p>","DOI":"10.1172\/jci.insight.136091","type":"journal-article","created":{"date-parts":[[2020,8,25]],"date-time":"2020-08-25T09:35:13Z","timestamp":1598348113000},"source":"Crossref","is-referenced-by-count":84,"title":["Kynurenines link chronic inflammation to functional decline and physical frailty"],"prefix":"10.1172","volume":"5","author":[{"given":"Reyhan","family":"Westbrook","sequence":"first","affiliation":[{"name":"Division of Geriatric Medicine and Gerontology,"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tae","family":"Chung","sequence":"additional","affiliation":[{"name":"Department of Physical Medicine and Rehabilitation, and"},{"name":"Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, 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