Sleeve gastrectomy ameliorates alveolar structures and surfactant protein expression in lungs of obese and diabetic rats

Background Bariatric surgeries have been shown to be effective in reversing damaged pulmonary function in individuals suffering from obesity and type 2 diabetes mellitus, whereas its underlying mechanisms remain largely unknown. Methods Sleeve gastrectomy (SG) was performed on obese and diabetic Wis...

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Veröffentlicht in:International Journal of Obesity 2020-12, Vol.44 (12), p.2394-2404
Hauptverfasser: Ruze, Rexiati, Li, Jianwen, Xu, Qian, Zhong, Mingwei, Xiong, Yacheng, Yan, Zhibo, Zhu, Jiankang, Cheng, Yugang, Ma, Zhe, Hu, Sanyuan, Zhang, Guangyong
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container_end_page 2404
container_issue 12
container_start_page 2394
container_title International Journal of Obesity
container_volume 44
creator Ruze, Rexiati
Li, Jianwen
Xu, Qian
Zhong, Mingwei
Xiong, Yacheng
Yan, Zhibo
Zhu, Jiankang
Cheng, Yugang
Ma, Zhe
Hu, Sanyuan
Zhang, Guangyong
description Background Bariatric surgeries have been shown to be effective in reversing damaged pulmonary function in individuals suffering from obesity and type 2 diabetes mellitus, whereas its underlying mechanisms remain largely unknown. Methods Sleeve gastrectomy (SG) was performed on obese and diabetic Wistar rats, and their pulmonary function and lung tissues were compared to sham-operated (SH) obese and diabetic rats, and age-matched healthy controls (C) to explore the improvements in microstructures and expression of surfactant protein (SP)-A and -C at postoperative 4th, 8th, and 12th week. Result Apart from the profound metabolic changes and improvement in pulmonary function, lung volume was restored along with an improved diffusion capacity noted by thinned capillary basement membrane and decreased harmonic mean length of diffusion barrier in SG rats. The digital slices of light microscope showed the general changes brought on by the SG, including normalized basic structures, ameliorated inflammatory status, as well as reduced lipid deposition, where the hydroxyproline (HYP), triglyceride (TG) assays, and electron microscope further suggested that the improvement in alveolar structures lies in reduced collagen fibers, lipids and septal tissues, increased capillary blood, and normalized alveolar type 2 (AT2) cells. Besides, disrupted SP-A and SP-C expression were also normalized after SG. Conclusion The improvement of lung function after SG is related to the ameliorated alveolar structures, and surface protein expression induced by weight loss and improved glucose metabolism.
doi_str_mv 10.1038/s41366-020-0647-y
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Methods Sleeve gastrectomy (SG) was performed on obese and diabetic Wistar rats, and their pulmonary function and lung tissues were compared to sham-operated (SH) obese and diabetic rats, and age-matched healthy controls (C) to explore the improvements in microstructures and expression of surfactant protein (SP)-A and -C at postoperative 4th, 8th, and 12th week. Result Apart from the profound metabolic changes and improvement in pulmonary function, lung volume was restored along with an improved diffusion capacity noted by thinned capillary basement membrane and decreased harmonic mean length of diffusion barrier in SG rats. The digital slices of light microscope showed the general changes brought on by the SG, including normalized basic structures, ameliorated inflammatory status, as well as reduced lipid deposition, where the hydroxyproline (HYP), triglyceride (TG) assays, and electron microscope further suggested that the improvement in alveolar structures lies in reduced collagen fibers, lipids and septal tissues, increased capillary blood, and normalized alveolar type 2 (AT2) cells. Besides, disrupted SP-A and SP-C expression were also normalized after SG. Conclusion The improvement of lung function after SG is related to the ameliorated alveolar structures, and surface protein expression induced by weight loss and improved glucose metabolism.</description><identifier>ISSN: 0307-0565</identifier><identifier>EISSN: 1476-5497</identifier><identifier>DOI: 10.1038/s41366-020-0647-y</identifier><identifier>PMID: 32719432</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>101/28 ; 13/105 ; 13/106 ; 14/63 ; 38/1 ; 38/79 ; 631/443/319/1642/393 ; 692/163/2743/137/138 ; 82/1 ; 82/79 ; 82/80 ; 96/63 ; Alveoli ; Body weight loss ; Care and treatment ; Collagen ; Complications and side effects ; Diabetes ; Diabetes mellitus ; Diabetes mellitus (non-insulin dependent) ; Diffusion barriers ; Epidemiology ; Gastrectomy ; Gastrointestinal surgery ; Glucose metabolism ; Health Promotion and Disease Prevention ; Hydroxyproline ; Inflammation ; Internal Medicine ; Lipids ; Lungs ; Medicine ; Medicine &amp; Public Health ; Metabolic Diseases ; Obesity ; Physiological aspects ; Protein expression ; Proteins ; Public Health ; Pulmonary functions ; Respiratory function ; Respiratory tract diseases ; Risk factors ; Rodents ; Surfactants ; Surgery ; Triglycerides ; Type 2 diabetes ; Weight loss</subject><ispartof>International Journal of Obesity, 2020-12, Vol.44 (12), p.2394-2404</ispartof><rights>The Author(s), under exclusive licence to Springer Nature Limited 2020</rights><rights>COPYRIGHT 2020 Nature Publishing Group</rights><rights>The Author(s), under exclusive licence to Springer Nature Limited 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c536t-c999f7862e67e7bab31e0b1963495a3768632fae91ed503464317afb0472352c3</citedby><cites>FETCH-LOGICAL-c536t-c999f7862e67e7bab31e0b1963495a3768632fae91ed503464317afb0472352c3</cites><orcidid>0000-0001-5308-0129 ; 0000-0002-0891-5307</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/s41366-020-0647-y$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1038/s41366-020-0647-y$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32719432$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ruze, Rexiati</creatorcontrib><creatorcontrib>Li, Jianwen</creatorcontrib><creatorcontrib>Xu, Qian</creatorcontrib><creatorcontrib>Zhong, Mingwei</creatorcontrib><creatorcontrib>Xiong, Yacheng</creatorcontrib><creatorcontrib>Yan, Zhibo</creatorcontrib><creatorcontrib>Zhu, Jiankang</creatorcontrib><creatorcontrib>Cheng, Yugang</creatorcontrib><creatorcontrib>Ma, Zhe</creatorcontrib><creatorcontrib>Hu, Sanyuan</creatorcontrib><creatorcontrib>Zhang, Guangyong</creatorcontrib><title>Sleeve gastrectomy ameliorates alveolar structures and surfactant protein expression in lungs of obese and diabetic rats</title><title>International Journal of Obesity</title><addtitle>Int J Obes</addtitle><addtitle>Int J Obes (Lond)</addtitle><description>Background Bariatric surgeries have been shown to be effective in reversing damaged pulmonary function in individuals suffering from obesity and type 2 diabetes mellitus, whereas its underlying mechanisms remain largely unknown. Methods Sleeve gastrectomy (SG) was performed on obese and diabetic Wistar rats, and their pulmonary function and lung tissues were compared to sham-operated (SH) obese and diabetic rats, and age-matched healthy controls (C) to explore the improvements in microstructures and expression of surfactant protein (SP)-A and -C at postoperative 4th, 8th, and 12th week. Result Apart from the profound metabolic changes and improvement in pulmonary function, lung volume was restored along with an improved diffusion capacity noted by thinned capillary basement membrane and decreased harmonic mean length of diffusion barrier in SG rats. The digital slices of light microscope showed the general changes brought on by the SG, including normalized basic structures, ameliorated inflammatory status, as well as reduced lipid deposition, where the hydroxyproline (HYP), triglyceride (TG) assays, and electron microscope further suggested that the improvement in alveolar structures lies in reduced collagen fibers, lipids and septal tissues, increased capillary blood, and normalized alveolar type 2 (AT2) cells. Besides, disrupted SP-A and SP-C expression were also normalized after SG. Conclusion The improvement of lung function after SG is related to the ameliorated alveolar structures, and surface protein expression induced by weight loss and improved glucose metabolism.</description><subject>101/28</subject><subject>13/105</subject><subject>13/106</subject><subject>14/63</subject><subject>38/1</subject><subject>38/79</subject><subject>631/443/319/1642/393</subject><subject>692/163/2743/137/138</subject><subject>82/1</subject><subject>82/79</subject><subject>82/80</subject><subject>96/63</subject><subject>Alveoli</subject><subject>Body weight loss</subject><subject>Care and treatment</subject><subject>Collagen</subject><subject>Complications and side effects</subject><subject>Diabetes</subject><subject>Diabetes mellitus</subject><subject>Diabetes mellitus (non-insulin dependent)</subject><subject>Diffusion barriers</subject><subject>Epidemiology</subject><subject>Gastrectomy</subject><subject>Gastrointestinal surgery</subject><subject>Glucose metabolism</subject><subject>Health Promotion and Disease Prevention</subject><subject>Hydroxyproline</subject><subject>Inflammation</subject><subject>Internal Medicine</subject><subject>Lipids</subject><subject>Lungs</subject><subject>Medicine</subject><subject>Medicine &amp; 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Methods Sleeve gastrectomy (SG) was performed on obese and diabetic Wistar rats, and their pulmonary function and lung tissues were compared to sham-operated (SH) obese and diabetic rats, and age-matched healthy controls (C) to explore the improvements in microstructures and expression of surfactant protein (SP)-A and -C at postoperative 4th, 8th, and 12th week. Result Apart from the profound metabolic changes and improvement in pulmonary function, lung volume was restored along with an improved diffusion capacity noted by thinned capillary basement membrane and decreased harmonic mean length of diffusion barrier in SG rats. The digital slices of light microscope showed the general changes brought on by the SG, including normalized basic structures, ameliorated inflammatory status, as well as reduced lipid deposition, where the hydroxyproline (HYP), triglyceride (TG) assays, and electron microscope further suggested that the improvement in alveolar structures lies in reduced collagen fibers, lipids and septal tissues, increased capillary blood, and normalized alveolar type 2 (AT2) cells. Besides, disrupted SP-A and SP-C expression were also normalized after SG. Conclusion The improvement of lung function after SG is related to the ameliorated alveolar structures, and surface protein expression induced by weight loss and improved glucose metabolism.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>32719432</pmid><doi>10.1038/s41366-020-0647-y</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0001-5308-0129</orcidid><orcidid>https://orcid.org/0000-0002-0891-5307</orcidid></addata></record>
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subjects 101/28
13/105
13/106
14/63
38/1
38/79
631/443/319/1642/393
692/163/2743/137/138
82/1
82/79
82/80
96/63
Alveoli
Body weight loss
Care and treatment
Collagen
Complications and side effects
Diabetes
Diabetes mellitus
Diabetes mellitus (non-insulin dependent)
Diffusion barriers
Epidemiology
Gastrectomy
Gastrointestinal surgery
Glucose metabolism
Health Promotion and Disease Prevention
Hydroxyproline
Inflammation
Internal Medicine
Lipids
Lungs
Medicine
Medicine & Public Health
Metabolic Diseases
Obesity
Physiological aspects
Protein expression
Proteins
Public Health
Pulmonary functions
Respiratory function
Respiratory tract diseases
Risk factors
Rodents
Surfactants
Surgery
Triglycerides
Type 2 diabetes
Weight loss
title Sleeve gastrectomy ameliorates alveolar structures and surfactant protein expression in lungs of obese and diabetic rats
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