A Plant Oxysterol as a regulator of glucose homeostasis
Keywords:
Insulin, glucose, hexokinase, protein, receptorAbstract
Background: Plant oxysterols like 28-homobrassinolide (HB) exhibit partial structural homology to oxycholesterols. HB’s effect in cell metabolism was therefore investigated using rat model. Results: Oral administration of HB to streptozotocin induced diabetic male albino wistar rats, reduced circulating glucose level to normal level. Serum insulin content was increased by HB treatment. HB elevated the hexokinase (HK) enzyme activity of liver in the experimental animal. Peroxidative damage of cellular lipids was reduced by HB based on quantitative estimates of malonyldialdehyde (MDA) and 4- hydroxy nonenol (4-HNE) content of erythrocyte samples. Conclusion: The antihyperglycemic and antioxidant potential of HB was presented
References
Olkkonen VM. New functions for
oxysterols and their cellular receptors. Lipid
Insights. 2008; 2: 1-9.
Bjorkhem I. Do oxysterols control
cholesterol homeostasis. J Clin Invest.
; 110: 725-730.
Anand PK, Kaul D. Oxysterol receptor
LXRα regulates SREBP gene expression
HL-60 cells exposed to differentiating
agents. Current Science. 2002; 82: 2.
Andrew CB, Cato. How do steroid
hormones function to induce the
transcription of specific genes?. Bioscience
Reports. 1983; 3: 101-111.
Radhakrishnan A, Ikeda Y, Kwon HJ.
Sterol regulated transport of SREBPs from
endoplasmic reticulum to golgi: Oxysterol
block transport by binding to Insig.
Proceedings in National Academy of
Sciences U.S.A. 2007; 104: 6511-8.
Kandutsch AA, Chen HW, Heiniger HJ.
Biological activity of some oxysterols.
Science. 1978; 201: 498-501.
Saloni Gill, Renee Chow, Andrew J. Sterol
regulators of cholesterol homeostasis and
beyond: The oxysterol hypothesis revisited
and revised. Progress in Lipid Research.
; 47: 391–404.
Lene K, Sissel M, Gertrud U, Knut Tomas
Dalen, Kari Anne R, Kristin Hollung, Fred
Haugen, Severina Jacinto, Stine M, Krister
Bamberg, Jan-Ake Gustafsson, Hilde I. On
the Role of Liver X Receptors in Lipid
Accumulation in Adipocytes. Molecular
Endocrinology. 2004; 17 (2): 172-182
Chawla A, Repa JJ, Evans RM,
Mangelsdorf DJ. Nuclear receptor and lipid
physiology: opening the X-files. Science.
; 294: 1866-1870.
Matsuda H, Kawaba T, Yamamoto Y.
Pharmacological studies of insect
metamorphosing steroids from Achyranthis
radix, Nippon Yakubutsugaku Zasshi. Folia
pharmacologica Japonica. 1970; 66: 551-
Vladimir, Vladimir, Adede. Twenty years
of brassinosteroids, steroidal plant
hormones warrant better crops for the XXI
century. Annals of Botany. 2002; 86: 441-
Mustafa, Didem, Nilüfer, Ekrem, Erdem. In
vivo antidiabetic and antioxidant potential
of Helichysum plicatum ssp. plicatum
capitulums in streptozotocin-induceddiabetic rats. Journal of
Ethnopharmacology. 2007; 109: 54-59.
Asatoor AM, King KJ. Simplified
Colorimetric blood sugar method.
Biochemistry. 1954; 56: xliv
Zak B, Dickenbaum RL, Whilte EG, Burret
H, Cherry PJ. Rapid estimation of free and
total cholesterol. American Journal of
Clinical Pathology. 1954; 24: 1307-1311.
Gruddy SM, Benjamin IJ. Diabetes and
Cardiovascular disease: a statement for
health care professionals from the American
heart association. Circulation. 1999; 100:
-1146.
Bairaktari E, Hatzidimou K. Estimation of
LDL cholesterol based on Friedwald
formula on apo-protein B levels. Clinical
Biochemistry. 2000; 33: 549-555.
Lowry OH., Rosebrough NJ, Protein
measurement with Folin-Phenol reagent.
JBC. 1951; 193: 265-275.
Yalow RS, Berson SA. Immunoassay for
plasma Insulin in man. Diabetes 1961; 10:
Jain S, McVie R, Duett J, Herbst JJ.
Erythrocyte membrane lipid peroxidation
and glycolylated hemoglobin in diabetes.
Diabetes. 1989; 38: 1539–1543.
Kinter M. Free Radicals, a Practical
Approach, In: Punchard NA and Kelly FJ
(Ed) Oxford University Press, Oxford. 1996
Tretjewey RN, Geigenberger P, Riedel K,
Hajirezaei M, Sonnewald U, Stitt M,
Riesmeir JW. Investigate in potato tuber
leads to a dramatic reduction in starch
accumulation and a stimulation of
glycolysis. The plant journal. 1989; 15: 10-
Ashcroft SJ, Hedeskov CJ, Randle PJ.
Glucose metabolism in mouse pancreatic
islets. Biochemistry Journal. 1970; 118:
-154.
Lensen S, Panten U. Signal recognition by
pancreatic beta-cell. Biochemical
Pharmacology. 1987; 37: 371-378.
Syrov VN, Khushbaktova ZA, Abazalova
M, Sultanov MB. On the hypolipidemic and
ant atherosclerotic action of
phytoecdysteroids. Doklady Akademii
Nauk Uzbeckoy SSR. 1983; 9: 44-45.
Muthuraman P, Srikumar K. A
brassinosteroid as an antihyperglycaemic in
alloxan induced diabetic rats. Journal of
Current Science. 2007; 9: 22-28.
Muthuraman P, Srikumar K. Antioxidant
potential of a Brassinosteroid in alloxan
induced diabetic male rat. Journal of
Current Science. 2007: 10: 541-546.
Selvam R, Anuradha CV. Lipid
Peroxidation and antiperoxidative enzyme
changes in erythrocyte in diabetes mellitus.
I JBB. 1988; 25: 268–272.
Giugliano D, Ceriello A, Paolisso G.
Oxidative stress and diabetic vascular
Complications. Diabetes Care. 1986; 19:
–267.
Freeman BA, Crapo JD. Hyperoxia
increases oxygen radical production in rat
lung and lung mitochondria. JBC. 1981;
: 10986–10992.
Doyotte AC, Cossu MC, Jacquin M,
Vasseur P. Antioxidant enzymes,
glutathione and lipid peroxidation as
relevant biomarkers of experimental or field
exposure in the gills and the digestive gland
of the freshwater bivalve. Unio tumidus.
Aquatic Toxicology. 19991; 39: 93–110.
Sutter-Dub MT, Kaaya A, Sfaxi A,
Sodoyez-Goffaux F, Sodoyez JC, Sutter
BC. Progesterone and synthetic steroids
produce insulin resistance at the postreceptor level in adipocytes of female rats.
Steroids. 1988; 52: 583-608.
Cagnacci A, Paoletti AM, Arangino S,
Melis GB, Volpe A. Effect of ovarian
suppression on glucose metabolism of
young lean women with and without
ovarian hyperandrogenism. Human
Reproduction. 1999; 14: 893-897.
Ballejo G, Saleem TH, Khan-Dawood FS,
Tsibris JC, Spellacy WN. The effect of sex
steroids on insulin binding by target tissues
in the rat. Contraception.1983; 28: 413-422.
Bruno LD, Magda FS, Emiliano OB,
Renato SB, Marco AM, Patrica MR.
Antigen induced Pleural Eosinophilia is
suppressed in Diabetic Rats: Role of
Corticosteroid Hormones. Mem. Inst.
Oswaldo Cruz, Rio de Janeiro.1997; 92:
-222.