Evaluation of adipocyte apoptosis by laser scanning cytometry

International Journal of Obesity and Related Metabolic Disorders : Journal of the International Association for the Study of Obesity
J LinC A Baile

Abstract

Adipocyte apoptosis plays an important role in adipose tissue homeostasis and can be altered under a variety of physiological and pathological conditions. This study was carried out to determine whether laser scanning cytometry (LSC) can be used to measure changes in apoptosis of adipocytes over time. LSC was used to investigate adipocyte apoptosis induced by tumor necrosis factor-alpha (TNF-alpha), a cytokine that is associated with obesity and insulin resistance. LSC, a slide-based solid phase cytofluorometer, provides quantitative flow fluorescence data together with morphological information for apoptotic detection. Both 3T3-L1 cells and rat adipocytes from primary cell culture were incubated with 0 or 25 nM TNF-alpha for up to 24 h. Both the FITC-conjugated annexin V/propidium iodide assay and the TUNEL assay were used to distinguish cells with apoptotic characteristics from nonapoptotic cells. Apoptosis did not increase over time in the absence of TNF-alpha for both 3T3-L1 cells and rat primary adipocytes. For both 3T3-L1 cells and rat primary adipocytes, a significant increase in the percentage of apoptotic cells was observed by 3-4 h incubation with TNF-alpha (P<0.05). By 24 h, more than 50% of cells incubated with TNF-...Continue Reading

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Citations

Jun 11, 2010·Journal of Physiology and Biochemistry·Hye-Kyeong KimClifton A Baile
Nov 19, 2010·Bioanalysis·Jason S KimJun Keun Chang
Jul 13, 2013·Cytometry. Part a : the Journal of the International Society for Analytical Cytology·Quang Minh Doan-XuanZsolt Bacso
Oct 4, 2005·Journal of the American Academy of Dermatology·Mathew M AvramWilliam D James
Apr 6, 2016·Journal of Lipid Research·Abigail S HakaFrederick R Maxfield
Aug 12, 2009·Journal of Biophotonics·Andreas O H GerstnerAttila Tárnok
May 9, 2012·The International Journal of Artificial Organs·Ling L CaiHui M Jin

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis