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The Effects of Chronically Increased Intra-abdominal Pressure on the Rabbit Diaphragm.
MedLine Citation:
PMID:  22246392     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Diaphragmatic muscular remodeling is caused by various conditions and was mainly studied in pulmonary pathologies and chronic alterations of intra-thoracic pressure. We investigate the effect of the chronically increased intra-abdominal pressure (IAP) on the diaphragm by morphological and biochemical analysis. METHODS: Thirty rabbits were divided into control and study groups. IAP was increased in group B to 12 mmHg for 2 months. The left hemidiaphragm underwent morphological, while the right underwent biochemical analysis. RESULTS: In H&E, all fibers were normal. ATPase analysis demonstrated that type I fibers show no differences between groups. Type ΙΙ(Α) were decreased (p = 0.016) while type ΙΙ(Β/X) fibers were increased (p = 0.025) in group B. Fibers with resistance to fatigue were decreased in group B (p = 0.024). In group B, biochemical activity for glutathione reductase (p = 0.004), glutathione peroxidase (p = 0.021), protein carbonylation (0.029), lipid peroxidation (p = 0.005), and balance of preoxidative-antioxidative factors (p = 0.006) was increased. CONCLUSIONS: Chronically increased IAP induces alterations to the rabbit diaphragm. Adaptation, equivalent to strenuous contraction, transforms the diaphragm to be functionally more efficient toward workload but makes it vulnerable against oxidative stress.
Authors:
Theodossis S Papavramidis; Efstathios Kotidis; Konstantinos Ioannidis; Angeliki Cheva; Thomai Lazou; George Koliakos; George Karkavelas; Spiros T Papavramidis
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-14
Journal Detail:
Title:  Obesity surgery     Volume:  -     ISSN:  1708-0428     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9106714     Medline TA:  Obes Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
3rd Department of Surgery, AHEPA University Hospital, Aristotle University of Thessaloniki, Aigaiou 6, 54655, Thessaloniki, Greece, Papavramidis@hotmail.com.
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