{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T01:02:05Z","timestamp":1791248525615,"version":"4.1.0"},"reference-count":41,"publisher":"Rockefeller University Press","issue":"13","content-domain":{"domain":["rupress.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2007,12,24]]},"abstract":"<jats:p>Asthma and chronic obstructive pulmonary disease (COPD) are characterized by different patterns of airway remodeling, which all include an increased mass of bronchial smooth muscle (BSM). A remaining major question concerns the mechanisms underlying such a remodeling of BSM. Because mitochondria play a major role in both cell proliferation and apoptosis, we hypothesized that mitochondrial activation in BSM could play a role in this remodeling. We describe that both the mitochondrial mass and oxygen consumption were higher in the BSM from asthmatic subjects than in that from both COPD and controls. This feature, which is specific to asthma, was related to an enhanced mitochondrial biogenesis through up-regulation of peroxisome proliferator-activated receptor \u03b3 coactivator (PGC)\u20131\u03b1, nuclear respiratory factor-1, and mitochondrial transcription factor A. The priming event of such activation was an alteration in BSM calcium homeostasis. BSM cell apoptosis was not different in the three groups of subjects. Asthmatic BSM was, however, characterized by increased cell growth and proliferation. Both characteristics were completely abrogated in mitochondria-deficient asthmatic BSM cells. Conversely, in both COPD and control BSM cells, induction of mitochondrial biogenesis reproduced these characteristics. Thus, BSM in asthmatic patients is characterized by an altered calcium homeostasis that increases mitochondrial biogenesis, which, in turn, enhances cell proliferation, leading to airway remodeling.<\/jats:p>","DOI":"10.1084\/jem.20070956","type":"journal-article","created":{"date-parts":[[2007,12,3]],"date-time":"2007-12-03T20:34:36Z","timestamp":1196714076000},"page":"3173-3181","update-policy":"https:\/\/doi.org\/10.1084\/jem.crossmarkpolicy","source":"Crossref","is-referenced-by-count":255,"title":["Bronchial smooth muscle remodeling involves calcium-dependent enhanced mitochondrial biogenesis in asthma"],"prefix":"10.1084","volume":"204","author":[{"given":"Thomas","family":"Trian","sequence":"first","affiliation":[{"name":"1Universite Bordeaux 2, Laboratoire de Physiologie Cellulaire Respiratoire, F-33076 Bordeaux, France"},{"name":"Institut National de la Sante\u0301 et de la Recherche Me\u0301dicale (INSERM),"},{"name":"2U885"},{"name":"Institut National de la Sante\u0301 et de 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