{"id":246823,"date":"2026-11-07T10:16:21","date_gmt":"2026-11-07T16:16:21","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/11\/safe-lysosomal-sequestration-of-ferrous-iron-is-mediated-via-cholesterol-shielding-and-drives-senescence-and-ferroptosis-resistance"},"modified":"2026-11-07T10:16:21","modified_gmt":"2026-11-07T16:16:21","slug":"safe-lysosomal-sequestration-of-ferrous-iron-is-mediated-via-cholesterol-shielding-and-drives-senescence-and-ferroptosis-resistance","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/11\/safe-lysosomal-sequestration-of-ferrous-iron-is-mediated-via-cholesterol-shielding-and-drives-senescence-and-ferroptosis-resistance","title":{"rendered":"Safe lysosomal sequestration of ferrous iron is mediated via cholesterol shielding and drives senescence and ferroptosis resistance"},"content":{"rendered":"\n<p>Iron accumulation is a conserved hallmark of cellular as well as organismal aging, yet its mechanistic role in senescence remains largely elusive. Here we show that the accumulation of ferrous iron (Fe2+) in lysosomes, a unique feature of senescent cells, is crucial for the induction of multiple senescence-associated phenotypes. Intriguingly, we found that this lysosomal Fe2+ sequestration is rendered \u201csafe\u201d by a dual metabolic adaptation that confers robust resistance to ferroptosis. First, Fe2+ accumulation triggers lysosomal alkalinization and subsequent cholesterol accumulation, which reinforces the lysosomal membrane against permeabilization. Second, senescent cells partition polyunsaturated fatty acids into lipid droplets, thereby depleting these ferroptosis-prone substrates from cellular membranes. Our findings establish that such cholesterol-enabled safe sequestration of Fe2+ serves as a central modulator linking senescence-associated remodeling to ferroptosis resistance. Modulating this lysosomal iron-centered pathway may provide new opportunities to target and control the behavior of senescent cells.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Iron accumulation is a conserved hallmark of cellular as well as organismal aging, yet its mechanistic role in senescence remains largely elusive. Here we show that the accumulation of ferrous iron (Fe2+) in lysosomes, a unique feature of senescent cells, is crucial for the induction of multiple senescence-associated phenotypes. Intriguingly, we found that this lysosomal [\u2026]<\/p>\n","protected":false},"author":662,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[269],"tags":[],"class_list":["post-246823","post","type-post","status-publish","format-standard","hentry","category-life-extension"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/246823","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/662"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=246823"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/246823\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=246823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=246823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=246823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}