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Proteome Analysis in Adipose Tissue of ob/ob Mice in Response to Chitosan Oligosaccharides Treatment
Rahman, Md. Atiar,Kumar, Suresh G.,Yun, Jong-Won 한국생물공학회 2010 Biotechnology and Bioprocess Engineering Vol.15 No.4
Adipose tissue plays a central role in the development of obesity, and thus characterization of the molecular changes related to obesity in this tissue is a main concern. Recently we identified chitosan oligosaccharides (CO) as a potent adipogenic inhibitor in 3T3-L1 cells. In the current study, a proteomic approach was used to investigate the anti-obesity effect of CO in white adipose tissue of ob/ob mice. CO administration significantly lowered body weight gain and epididymal WAT mass compared to control animals. In addition, twenty-five proteins were found to be differentially expressed between the two groups of animals in response to CO treatment. Expression changes in Karyopherin beta 1, indoleamine-pyrrole 2,3-dioxygenase, and retinoic acid binding protein were associated here for the first time with obesity. Immunoblotting studies of adipocyte protein 2 (aP2) and aquaporin-7 also showed amelioration in their levels in WAT. Furthermore, the results of adipose tissue specific gene expressions of aP2, adiponectin, TNF-${\alpha}$, and IL-6 were in good agreement with improved levels of obesity. Gene expression of PPARg and SREBP-1c were also down-regulated by CO treatment. The results suggest that the anti-obesity effect of CO might be mediated by the modulation of adipokines and adipose tissue specific genes.
Proteome Analysis for 3T3-L1 Adipocyte Differentiation
Rahman, Atiar,Kumar, Suresh G.,Lee, Sung-Hak,Hyun, Sun-Hwang,Kim, Hyun-Ah,Yun, Jong-Won The Korean Society for Microbiology and Biotechnol 2008 Journal of microbiology and biotechnology Vol.18 No.12
Adipose tissue is an important endocrine organ involved in the control of whole body energy homeostasis and insulin sensitivity. Considering the increased incidence of obesity and obesity-related disorders, including diabetes, it is important to understand thoroughly the process of adipocyte differentiation and its control. Therefore, we performed a differential proteome mapping strategy using two-dimensional gel electrophoresis combined with peptide mass fingerprinting to identify intracellular proteins that are differentially expressed during adipose conversion of 3T3-L1 pre-adipocytes in response to an adipogenic cocktail. In the current study, we identified 46 differentially expressed proteins, 6 of which have not been addressed previously in 3T3-L1 cell differentiation. Notably, we found that phosphoribosyl pyrophosphate synthetase (PRPS), a regulator of cell proliferation, was preferentially expressed in pre-adipocytes than in fully differentiated adipocytes. In conclusion, our results provide valuable information for further understanding of the adipogenic process.
Abu Ahmed,Atiar Rahman,Sarowar Jahan Khan,Nipun Mojumder,Farjana Sharmin,Muhammad Abu Bakar,Kamirul Hasan Chowdhury,Mohammad Ali Azadi 경희대학교 융합한의과학연구소 2016 Oriental Pharmacy and Experimental Medicine Vol.31 No.4
Water hyacinth (Eichhornia crassipes) has been used in phytoextraction to uptake heavy metals and trace elements in various experiments. This research investigated the protective effects of Water hyacinth extracts on Lead (Pb)-induced toxicity in the albino rat. Forty-eight six-weeks-old Wistar albino male rats (average weight, 180 ± 6.45 g) were divided into six groups: normal control (NC), Pb control (PbC), Chloroform extract (ChEx), Ethyl acetate extract (EAEx), Methanol extract (MeEx) and Ascorbic acid treated groups (AA, positive control). All animals except NC group have been administered with Lead acetate (Pb(CH3COOH)2) before the therapeutic dose. Thrombolytic and cytotoxic effects were evaluated by modified clot lysis and Brine shrimp lethality tests respectively. Biochemical analyses reports revealed that ChEx significantly (P ≤ 0.05) reduced the elevated alkaline phosphatase (ALP) and aspartate amino transferase (AST) whereas MeEx did the alanine amino transferase (ALT) in comparison to positive control. ChEx significantly inhibited the Pb deposition in kidney and liver than two other extracts. ChEx significantly increased the liver protein compared to PbC group. In the thrombolytic assay, EAEx showed the pronounced clot lysis (49.24 %) while ChEx and MeEx showed 45.18 % and 29.13 % of clot lysis respectively. In Brine shrimp lethality bioassay, the LC50 value of the ChEx, EAEx and MeEx were 4.16, 4.47 and 9.27 μg/mg respectively and values were statistically significant (p < 0.05) compared to that of reference cytotoxic agent, Vincristine sulfate (LC50’ 0.55). Histopathological screening of kidney, liver and spleen showed that ethyl acetate extract recovered the highest of the cellular damage caused by Lead acetate. Biochemical and histopathological screening, therefore, demonstrate that Water hyacinth could be one of the promising sources of normalizing the Pb-poisoning and enhancing the thrombolysis in an animal model. Therapeutic prospects of Water hyacinth could be further studied through highlighting a dose-response study.
Chitosan Oligosaccharides Inhibit Adipogenesis in 3T3-L1 Adipocytes
( Eun Jae Cho ),( Atiar Rahman ),( Sang Woo Kim ),( Yu Mi Baek ),( Hye Jin Hwang ),( Jung Young Oh ),( Hee Sun Hwang ),( Sung Hak Lee ),( Jong Won Yun ) 한국미생물 · 생명공학회 2008 Journal of microbiology and biotechnology Vol.18 No.1
The 3T3-L1 cell line is a well-established and commonly used in vitro model to assess adipocyte differentiation. Over the course of several days, confluent 3T3-L1 cells can be converted to adipocytes in the presence of an adipogenic cocktail. In this study, the effects of chitosan oligosaccharides (CO) on adipocyte differentiation of 3T3-L1 cells were studied. The CO significantly decreased lipid accumulation, a marker of adipogenesis, in a dosedependent manner. The low molecular mass CO (1-3 kDa) were the most effective at inhibiting adipocyte differentiation. Moreover, mRNA expression levels of both CCAAT/enhancer-binding protein (C/EBP) α and peroxisome proliferator-activated receptor (PPAR) γ, the key adipogenic transcription factors, were markedly decreased by CO treatments. CO also significantly downregulated adipogenic marker proteins such as leptin, adiponectin, and resistin. Our results suggest a role for CO as antiobesity agents by inhibiting adipocyte differentiation mediated through the downregulated expression of adipogenic transcription factors and other specific genes.
Kumar, Suresh G.,Rahman, Md. Atiar,Lee, Sung Hak,Hwang, Hee Sun,Kim, Hyun Ah,Yun, Jong Won WILEY-VCH Verlag 2009 Proteomics Vol.9 No.8
<P>Altered levels of adipokines, derived as a result of distorted adipocytes, are the major factors responsible for changing biochemical parameters in obesity that leads to the development of metabolic disorders such as insulin resistance and atherosclerosis. In our previous reports, chitosan oligosaccharides (CO) were proved to inhibit the differentiation of 3T3-L1 adipocytes. In the present study, an attempt was made to investigate the anti-obesity and anti-diabetic effect of CO on ob/ob mice, by means of differential proteomic analysis of plasma. This was followed by immunoblotting, and gene expression in adipose tissue to clarify the molecular mechanism. CO treatment showed reduced diet intake (13%), body weight gain (12%), lipid (29%) and glucose levels (35%). 2-DE results showed differential levels of five proteins namely RBP4, apoE, and apoA-IV by >2-fold down-regulation and by >2-fold of apoA-I and glutathione peroxidase (GPx) up-regulation after CO treatment. Immunoblotting studies of adiponectin and resistin showed amelioration in their levels in plasma. Furthermore, the results of gene expressions for adipose tissue specific TNF-α, and IL-6 secretary molecules were also down-regulated by CO treatment. Gene expressions of PPARγ in adipose tissue were in good agreement with the ameliorated levels of adipokines, thereby improving the pathological state. Taken together, CO might act as a potent down-regulator of obesity-related gene expression in ob/ob mice that may normalize altered plasma proteins to overcome metabolic disorders of obesity.</P>
Md. Rakibul Hassan Bulbul,Md. Atiar Rahman,Md. Zillur Rahman,Talha Bin Emran,Mirola Afroze,Mala Khan,Muhammad Abid Hasan Chowdhury,Mohammed Auwal Ibrahim,Mohammed Sohel Chowdhury 경희대학교 융합한의과학연구소 2020 Oriental Pharmacy and Experimental Medicine Vol.20 No.1
This study investigated the restorative effect of Leea macrophylla ethanol root extract (LMERE) in carbon tetrachloride (CCl4) induced hepatic injury. It also tried to unfold the underlying mechanism through ligand-receptor interactions. Prior to conduct the CCl4 induced animal model study, the in vitro antioxidative capacities of LMERE were investigated. Gas chromatography mass spectroscopy (GC–MS) was accomplished to identify the prevalent bioactive compounds. The molecular docking was performed using Schrödinger Suites 2017-1. Results showed the promising antioxidative potentials of LMERE in in vitro models. Upon treatment of CCl4 intoxicated animals with LMERE, serum ALT and AST were found to be significantly (p < 0.05) reduced compared to the CCl4 control while LMERE50 was noted as the best dose in restoring the hepatic markers. Serum lipids and total protein were significantly restored compared to control. Remarkable changes of cell necrosis, apoptosis and sinusoidal dilution were noticed in histopathological assay of liver tissue. mRNA expression for superoxide dismutase (SOD1) and catalase was multifold increased which are statistically significant compared to reference drug, silymarin. In docking study, octadecanoic acid showed the lowest binding energy and highest binding affinity with the protein (ID: 1VKX) which is a crystallized structure of NF-κB p50/p65 heterodimer involved in cytokine production. The findings demonstrate that LMERE restores the hepatic damage by the mRNA expression of antioxidative enzymes while LMERE50, at a glance, seems the most suitable dose.
윤종원,Hye Jin Hwang,Sang Woo Kim,Yu Mi Baek,Sung Hak Lee,Hee Sun Hwang,Suresh G. Kumar,Md. Atiar Rahman 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.2
We investigated the influence of hypoglycemic fungal extracellular polysaccharides (EPS) on the differential expression of liver proteins in streptozotocin (STZ)-induced diabetic rats. The results of diabetic study revealed that orally administrated EPS exhibited an excellent hypoglycemic effect, lowering the average plasma glucose level in EPS-fed rats to 55.1% with enhanced glucose tolerance. In the next step, we analyzed the differential expression patterns of rat liver proteins from each group to discover potent candidates for diabetes-associated proteins. 34 proteins were upregulated and 35 proteins were downregulated upon diabetes induction. Surprisingly, the altered levels of most proteins in the diabetic group were fully or partially restored to those of the non-diabetic control group by EPS treatment. Although the molecular basis of protein modulation after EPS administration in diabetic rats was not verified, the results of the proteomic analysis provide impetus for further studies to identify reliable biomarkers for diabetic therapy.