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Apoptosis in extracorporeal preserved inguinal fat flaps of the rat.
MedLine Citation:
PMID:  22223358     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Fat cells are fragile cells with a short life span outside the body. Ways to reduce cell death in a biochemical way are almost unknown due to scarce information on the type of cellular death that is induced in fat tissue. This study was designed to investigate the apoptotic pathways of fat tissue in a permanent perfusion bioreactor system with the Hannover preservation solution and the Eurocollins solution in fat flaps of rats. In Lewis rats, the inguinal adipofascial flaps were elevated bilaterally and placed in a bioreactor at 37°C. To detect caspases 3, 8, 9 and 12, immunofluorescence stains of fat tissue specimen were analysed at several time points after preservation of flaps were placed in Hannover solution and Eurocollins solution for 10 days. An additional visual assessment of viability by a calcein based life/dead test was performed. It revealed a superior viability of the adipose tissue preserved in Hannover solution. Immunofluorescence staining demonstrated that apoptotic pathways via mitochondria, endoplasmatic reticulum and death receptors were activated, as Caspases 8, 9 and 12 were detected. Caspase 3 as an effector in the common apoptotic pathway was detected as well. Adipose tissue preserved at 37°C ex vivo in a bioreactor system undergoes apoptosis. Immunofluorescence examination of the fat tissue preserved ex vivo revealed that apoptotic pathways via mitochondria, endoplasmatic reticulum and death receptors are being activated. Significantly less activation of Caspase 3, 8, 9 and 12 in flaps preserved in Hannover solution in comparison to Eurocollins was found, supporting the anti apoptotic characteristics of Hannover solution. Based on these findings, further research to modify the apoptotic pathways to ameliorate viability of fat tissue can be performed.
Authors:
Christian Herold; Hans O Rennekampff; Lea Ohm; Sarah Strauß; Jörn Linkner; Kerstin Reimers; Christina Allmeling; Bernhard Vaske; Peter M Vogt
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-6
Journal Detail:
Title:  Apoptosis : an international journal on programmed cell death     Volume:  -     ISSN:  1573-675X     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9712129     Medline TA:  Apoptosis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Plastic, Hand- and Reconstructive Surgery, Hanover Medical School, 30625, Hanover, Germany, Herold.Christian@MH-Hannover.de.
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