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511.
Amir Ajoolabady Cynthia Lebeaupin Ne N. Wu Randal J. Kaufman Jun Ren 《Medicinal research reviews》2023,43(1):5-30
The endoplasmic reticulum (ER) governs the proper folding of polypeptides and proteins through various chaperones and enzymes residing within the ER organelle. Perturbation in the ER folding process ensues when overwhelmed protein folding exceeds the ER handling capacity, leading to the accumulation of misfolded/unfolded proteins in the ER lumen—a state being referred to as ER stress. In turn, ER stress induces a gamut of signaling cascades, termed as the “unfolded protein response” (UPR) that reinstates the ER homeostasis through a panel of gene expression modulation. This type of UPR is usually deemed “adaptive UPR.” However, persistent or unresolved ER stress hyperactivates UPR response, which ultimately, triggers cell death and inflammatory pathways, termed as “maladaptive/terminal UPR.” A plethora of evidence indicates that crosstalks between ER stress (maladaptive UPR) and inflammation precipitate obesity pathogenesis. In this regard, the acquisition of the mechanisms linking ER stress to inflammation in obesity might unveil potential remedies to tackle this pathological condition. Herein, we aim to elucidate key mechanisms of ER stress-induced inflammation in the context of obesity and summarize potential therapeutic strategies in the management of obesity through maneuvering ER stress and ER stress-associated inflammation. 相似文献
512.
David G. Nicholls 《Acta physiologica (Oxford, England)》2023,237(4):e13938
Exactly 50 years ago, I was a post-doc in the laboratory of Olov Lindberg in Stockholm measuring fatty acid oxidation by mitochondria isolated from thermogenic brown adipose tissue, when we noticed a curious nonlinearity in the respiration rate. This initiated a convoluted chain of experiments revealing that the mitochondria were textbook demonstrations of the then novel and highly controversial “chemiosmotic hypothesis” of Peter Mitchell and that thermogenesis was regulated by a proton short-circuit, mediated by a 32 kDa “uncoupling protein,” UCP1, activated by fatty acid. This review is a personal account of the research into the bioenergetics of isolated brown adipocytes and isolated mitochondria, which led, after fifteen years of investigation, to what is still accepted as the “canonical” UCP1-mediated mechanism of nonshivering thermogenesis, uniting whole animal physiology with mitochondrial bioenergetics. 相似文献
513.