{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T12:54:15Z","timestamp":1785934455064,"version":"3.56.0"},"reference-count":75,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T00:00:00Z","timestamp":1748563200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Pharmacol."],"abstract":"<jats:sec><jats:title>Background and Purpose<\/jats:title><jats:p>Both chronic obstructive pulmonary disease (COPD) and depression are associated with chronic inflammation and their comorbidity represents a critical unmet treatment need. N-methyl-D-aspartate glutamatergic receptors (NMDAR) are well characterized in CNS and widely expressed in lung tissue and inflammation-related cells. Pathologic NMDAR activation, leading to proinflammatory signaling, reactive oxidative stress and tissue damage plays a crucial role in chronic lung injury and depression. D-cycloserine (DCS), an antitubercular antibiotic, acts also as a NMDAR functional antagonist and has antidepressant and anti-inflammatory effects. We hypothesize that NMDAR downregulation represents a unified molecular target for the treatment of COPD\u2013depression comorbidity. This study assessed whether DCS can ameliorate lung injury and depression\u2013like behavior in the porcine pancreatic elastase (PPE)\/<jats:italic>E.coli<\/jats:italic> lipopolysaccharide (LPS) murine COPD model.<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and Methods<\/jats:title><jats:p>Male BALB\/c mice 7\u20138\u00a0weeks old received PPE intratracheally (IT) (1.2\u00a0U\/20\u00a0\u00b5L\/mouse) on days 0, 7, 14 and 21 and LPS (7\u00a0\u00b5g\/20\u00a0\u00b5L\/mouse) on days 4, 11, 18 and 25 (Groups 2\u20135). Sham control mice (Group 1) received same volume of saline IT in the same schedule as PPE and LPS. Vehicle (saline) or DCS 100 or 200\u00a0mg\/kg were administered intraperitoneally once daily from day 28 to day 34 (Groups 2\u20134). An additional group (Group 5) received DCS 100\u00a0mg\/kg once weekly (days 7, 14 and 21) and once daily from day 28 to day 34. On day 35 mice underwent the forced swim test (FST) and lungs were harvested for histopathological analyses.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Inflammatory cell infiltration, focal emphysema, measured by the mean linear intercept (MLI), and FST immobility duration, a rodent proxy for depression, were all increased (p &amp;lt; 0.05) in the vehicle group. In comparison with the vehicle group, immobility duration was reduced (p &amp;lt; 0.05) in both DCS 100\u00a0mg\/kg groups. Moreover, the severity grading of lung inflammation and MLI were reduced (p &amp;lt; 0.05) in the DCS 100\u00a0mg\/kg \u00d7 10 group and in all DCS-treated groups, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Our findings suggest beneficial DCS effects and warrant further DCS investigation as an innovative treatment for COPD-depression comorbidity.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fphar.2025.1554337","type":"journal-article","created":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T05:46:09Z","timestamp":1748583969000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":3,"title":["D-cycloserine effects on COPD and depression in a murine experimental model"],"prefix":"10.3389","volume":"16","author":[{"given":"Uriel","family":"Heresco-Levy","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jacob","family":"Haviv","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yehezkel G.","family":"Caine","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jimmy","family":"Bao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tai-Yu","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chien-Chang","family":"Shen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naama R.","family":"Bogot","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2025,5,30]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"99","DOI":"10.1038\/cdd.2010.79","article-title":"Sustained calcium signalling and caspase-3 activation involve NMDA receptors in thymocytes in contact with dendritic cells","volume":"18","author":"Affaticati","year":"2011","journal-title":"Cell Death Differ."},{"key":"B2","doi-asserted-by":"publisher","first-page":"297","DOI":"10.1186\/s12889-024-17686-9","article-title":"Estimating the global prevalence of chronic obstructive pulmonary disease (COPD): a systematic review and meta-analysis","volume":"24","author":"Al Wachami","year":"2024","journal-title":"BMC Public Health"},{"key":"B3","doi-asserted-by":"publisher","first-page":"L1253","DOI":"10.1152\/ajplung.00402.2014","article-title":"NMDA receptors mediate contractile responses in human airway smooth muscle cells","volume":"308","author":"Anaparti","year":"2015","journal-title":"Am. 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