Erythrocyte membrane fatty acid profile and saturation index in gallbladder carcinogenesis: a case-control study

Pandey Manoj, Sharma, Singh Shailesh, Shukla

Description

Gallbladder cancer is a common neoplasm of biliary tract, with an unknown etiology. Patients and methods This study was carried out to evaluate the changes in the membrane fatty acid profile and saturation index in patients with gallbladder cancer. The study sample consisted of 50 newly diagnosed cases of gallbladder cancer and 50 patients undergoing cholecystectomy for cholelithiasis were recruited as controls. The fatty acid estimation was carried out by high performance liquid chromatography (HPLC). Statistical analysis was carried out by student 't' test and one-way ANOVA. Pearson's correlation coefficient was also obtained. Results A significant lowering of erythrocyte membrane stearic acid (p = 0.000), arachidonic acid (p = 0.001), and saturation index (p = 0.001) was observed in patients with gallbladder cancer compared to controls. A significant inverse relation was observed between stearic and oleic acid (r = -0.269 p = 0.007). Conclusion Results of the present study suggest an increase in the delta 9 desaturation in cancer patients compared to controls however, a possible role of biliary stasis due to altered gallbladder motility or derangements of signal transduction secondary to altered membrane lipid bilayer cannot be ruled out.

Sujets

• Gallbladder
• Carcinogenesis
• Fatty acid
• Stearic acid
• Oleic acid
• Arachidonic acid
• Lipid peroxidation
• Gallstone
• Lipid bilayer
• Signal transduction

Informations

• Publié par: biomed
• Publié le: 01 janvier 2003
• Nombre de lectures: 134
• Langue: English

Extrait

World Journal of Surgical Oncology

BioMedCentral

Open Access Research Erythrocyte membrane fatty acid profile and saturation index in gallbladder carcinogenesis: a case-control study 1 23 2 Manoj Pandey*, Lal B Sharma, Shailesh Singhand Vijay K Shukla

1 2 Address: Departmentof Surgical Oncology, Regional Cancer Centre, Thiruvananthapuram, 695 011, Kerala, India,Department of Surgery, 3 Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India andCurrent address Department of Microbiology & Immunology, Morehouse School of Medicine, 720 Westview Drive, SW Atlanta, GA 30310, USA Email: Manoj Pandey*  [e-mail]; Lal B Sharma  [e-mail]; Shailesh Singh  [e-mail]; Vijay K Shukla  [e-mail] * Corresponding author

Published: 7 May 2003Received: 12 February 2003 Accepted: 7 May 2003 World Journal of Surgical Oncology2003,1:5 This article is available from: http://www.wjso.com/content/1/1/5 © 2003 Pandey et al; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL.

gdaelslabtluardadsercarcinogenesisfatty acidstearic acidoleic acidarachidonic acidlipid peroxidationgallstoneslipid bilayersignal transductiondelta 9

Abstract Background:Gallbladder cancer is a common neoplasm of biliary tract, with an unknown etiology. Patients and methods:This study was carried out to evaluate the changes in the membrane fatty acid profile and saturation index in patients with gallbladder cancer. The study sample consisted of 50 newly diagnosed cases of gallbladder cancer and 50 patients undergoing cholecystectomy for cholelithiasis were recruited as controls. The fatty acid estimation was carried out by high performance liquid chromatography (HPLC). Statistical analysis was carried out by student 't' test and one-way ANOVA. Pearson's correlation coefficient was also obtained. Results:A significant lowering of erythrocyte membrane stearic acid (p = 0.000), arachidonic acid (p = 0.001), and saturation index (p = 0.001) was observed in patients with gallbladder cancer compared to controls. A significant inverse relation was observed between stearic and oleic acid (r = -0.269 p = 0.007). Conclusion:Results of the present study suggest an increase in the delta 9 desaturation in cancer patients compared to controls however, a possible role of biliary stasis due to altered gallbladder motility or derangements of signal transduction secondary to altered membrane lipid bilayer cannot be ruled out.

Introduction Fatty acids are long chain organic acids and form a major component of membrane lipids. A membrane fatty acid profile is thought to reflect the body composition as well as dietary fat intake [1]. Of these, polyunsaturated fatty ac ids (PUFA) are prone to free radical attack and hydrogen abstraction, the oxidative damage being termed as lipid

peroxidation [2]. This causes a reduction in the mem brane fluidity and permeability [2]. These changes in the lipid bilayer are also thought to interfere with the electron transport chain and signal transduction across the cellular membrane.

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