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Al-U'datt DGF, Alu'datt MH, Tranchant CC, Al-Dwairi A, Al-Shboul O, Almajwal A, Elsalem L, Jaradat S, Alzoubi KH, Faleh BG, Ahmed YB, Alqbelat J. Royal jelly mediates fibrotic signaling, collagen cross-linking and cell proliferation in cardiac fibroblasts. Biomed Pharmacother 2023; 164:114922. [PMID: 37236025 DOI: 10.1016/j.biopha.2023.114922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 05/16/2023] [Accepted: 05/19/2023] [Indexed: 05/28/2023] Open
Abstract
Royal jelly (RJ) is a multifunctional bee product with a unique composition and wide-ranging biological properties, including antioxidant, anti-inflammatory and antiproliferative activities. Still, little is known about the possible myocardial protective properties of RJ. Considering that sonication could enhance RJ bioactivity, this study aimed to assess the effects of non-sonicated (NS) and sonicated (S) RJ on fibrotic signaling, cell proliferation, and collagen production in cardiac fibroblasts. S-RJ was produced by ultrasonication at 20 kHz. Ventricular fibroblasts isolated from neonatal rats were cultured and treated with different concentrations of NS-RJ or S-RJ (0, 50, 100, 150, 200, and 250 µg/well). S-RJ significantly depressed the expression levels of transglutaminase 2 (TG2) mRNA across all the concentrations tested and was inversely associated with the expression of this profibrotic marker. S-RJ and NS-RJ displayed distinct dose-dependent effects on mRNA expression of several other profibrotic, proliferation, and apoptotic markers. Unlike NS-RJ, S-RJ elicited strong negative dose-dependent relationships with the expression of profibrotic markers (TG2, COL1A1, COL3A1, FN1, CTGF, MMP-2, α-SMA, TGF-β1, CX43, periostin), as well as proliferation (CCND1) and apoptotic (BAX, BAX/BCL-2) markers, indicating that RJ dose-response effects were significantly modified by sonification. NS-RJ and S-RJ increased the content of soluble collagen, while decreasing collagen cross-linking. Collectively, these findings show that S-RJ has a greater range of action than NS-RJ for downregulating the expression of biomarkers associated with cardiac fibrosis. Reduced biomarker expression and collagen cross-linkages upon cardiac fibroblast treatment with specific concentrations of S-RJ or NS-RJ suggests putative roles and mechanisms by which RJ may confer some protection against cardiac fibrosis.
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Affiliation(s)
- Doa'a G F Al-U'datt
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan.
| | - Muhammad H Alu'datt
- Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, P.O. Box 3030, Irbid 22110, Jordan
| | - Carole C Tranchant
- School of Food Science, Nutrition and Family Studies, Faculty of Health Sciences and Community Services, Université de Moncton, New Brunswick, Canada.
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Othman Al-Shboul
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Ali Almajwal
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Lina Elsalem
- Department of Pharmacology, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Saied Jaradat
- Princess Haya Biotechnology Center, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Karem H Alzoubi
- Department of Pharmacy Practice and Pharmacotherapeutics, College of Pharmacy, University of Sharjah, Sharjah, United Arab Emirates; Department of Clinical Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Belal G Faleh
- General Surgery Department, Princess Basma Teaching Hospital, Irbid, Jordan
| | - Yaman B Ahmed
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Jenan Alqbelat
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
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Simmen FA, Pabona JMP, Al-Dwairi A, Alhallak I, Montales MTE, Simmen RCM. Malic Enzyme 1 (ME1) Promotes Adiposity and Hepatic Steatosis and Induces Circulating Insulin and Leptin in Obese Female Mice. Int J Mol Sci 2023; 24:ijms24076613. [PMID: 37047583 PMCID: PMC10095602 DOI: 10.3390/ijms24076613] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/21/2023] [Accepted: 03/29/2023] [Indexed: 04/05/2023] Open
Abstract
Malic Enzyme 1 (ME1) supports lipogenesis, cholesterol synthesis, and cellular redox potential by catalyzing the decarboxylation of L-malate to pyruvate, and the concomitant reduction of NADP to NADPH. We examined the contribution of ME1 to the development of obesity by provision of an obesogenic diet to C57BL/6 wild type (WT) and MOD-1 (lack ME1 protein) female mice. Adiposity, serum hormone levels, and adipose, mammary gland, liver, and small intestine gene expression patterns were compared between experimental groups after 10 weeks on a diet. Relative to WT female mice, MOD-1 female mice exhibited lower body weights and less adiposity; decreased concentrations of insulin, leptin, and estrogen; higher concentrations of adiponectin and progesterone; smaller-sized mammary gland adipocytes; and reduced hepatosteatosis. MOD-1 mice had diminished expression of Lep gene in abdominal fat; Lep, Pparg, Klf9, and Acaca genes in mammary glands; Pparg and Cdkn1a genes in liver; and Tlr9 and Ffar3 genes in the small intestine. By contrast, liver expression of Cdkn2a and Lepr genes was augmented in MOD-1, relative to WT mice. Results document an integrative role for ME1 in development of female obesity, suggest novel linkages with specific pathways/genes, and further support the therapeutic targeting of ME1 for obesity, diabetes, and fatty liver disease.
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Affiliation(s)
- Frank A. Simmen
- Department of Physiology & Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- The Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - John Mark P. Pabona
- Department of Physiology & Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, College of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Iad Alhallak
- Department of Physiology & Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Maria Theresa E. Montales
- Department of Physiology & Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Rosalia C. M. Simmen
- Department of Physiology & Cell Biology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
- The Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
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Al-U'datt DGF, Tranchant CC, Alu'datt M, Abusara S, Al-Dwairi A, AlQudah M, Al-Shboul O, Hiram R, Altuntas Y, Jaradat S, Alzoubi KH. Inhibition of transglutaminase 2 (TG2) ameliorates ventricular fibrosis in isoproterenol-induced heart failure in rats. Life Sci 2023; 321:121564. [PMID: 36931499 DOI: 10.1016/j.lfs.2023.121564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 03/06/2023] [Accepted: 03/06/2023] [Indexed: 03/17/2023]
Abstract
AIMS Transglutaminase (TG) inhibitors represent promising therapeutic interventions in cardiac fibrosis and related dysfunctions. However, it remains unknown how TG inhibition, TG2 in particular, affects the signaling systems that drive pathological fibrosis. This study aimed to examine the effect TG inhibition by cystamine on the progression of isoproterenol (ISO)-induced cardiac fibrosis and dysfunction in rats. MATERIALS AND METHODS Cardiac fibrosis was established by intraperitoneal injection of ISO to rats (ISO group), followed by 6 weeks of cystamine injection (ISO + Cys group). The control groups were administered normal saline alone or with cystamine. Hemodynamics, lipid profile, liver enzymes, urea, and creatinine were assessed in conjunction with heart failure markers (serum NT-proANP and cTnI). Left ventricular (LV) and atrial (LA) fibrosis, total collagen content, and mRNA expression of profibrotic markers including TG2 were quantified by Masson's trichrome staining, LC-MS/MS and quantitative PCR, respectively. KEY FINDINGS Cystamine administration to ISO rats significantly decreased diastolic and mean arterial pressures, total cholesterol, triglycerides, LDL, liver enzymes, urea, and creatinine levels, while increasing HDL. NT-proANP and cTnI serum levels remained unchanged. In LV tissues, significant reductions in ISO-induced fibrosis and elevated total collagen content were achieved after cystamine treatment, together with a reduction in TG2 concentration. Reduced mRNA expression of several profibrotic genes (COL1A1, FN1, MMP-2, CTGF, periostin, CX43) was also evidenced in LV tissues of ISO rats upon cystamine administration, whereas TGF-β1 expression was depressed in LA tissues. Cystamine decreased TG2 mRNA expression in the LV of control rats, while LV expression of TG2 was relatively low in ISO rats irrespective of cystamine treatment. SIGNIFICANCE TG2 inhibition by cystamine in vivo exerted cardioprotective effects against ISO-induced cardiac fibrosis in rats decreasing the LV abundance of several profibrotic markers and the content of TG2 and collagen, suggesting that TG2 pharmacological inhibition could be beneficial to alleviate cardiac fibrosis.
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Affiliation(s)
- Doa'a G F Al-U'datt
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan.
| | - Carole C Tranchant
- School of Food Science, Nutrition and Family Studies, Faculty of Health Sciences and Community Services, Université de Moncton, New Brunswick, Canada
| | - Muhammad Alu'datt
- Department of Nutrition and Food Technology, Faculty of Agriculture, Jordan University of Science and Technology, P.O. Box 3030, Irbid 22110, Jordan
| | - Sara Abusara
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Mohammad AlQudah
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan; Physiology Department, Arabian Gulf University, Manama, Bahrain
| | - Othman Al-Shboul
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Roddy Hiram
- Montreal Heart Institute and Department of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Yasemin Altuntas
- Montreal Heart Institute and Department of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Saied Jaradat
- Princess Haya Biotechnology Center, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Karem H Alzoubi
- Department of Pharmacy Practice and Pharmacotherapeutics, University of Sharjah, Sharjah, United Arab Emirates; Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
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Al-U’datt DGF, Tranchant CC, Al-Husein B, Hiram R, Al-Dwairi A, AlQudah M, Al-shboul O, Jaradat S, Alqbelat J, Almajwal A. Involvement and possible role of transglutaminases 1 and 2 in mediating fibrotic signalling, collagen cross-linking and cell proliferation in neonatal rat ventricular fibroblasts. PLoS One 2023; 18:e0281320. [PMID: 36848364 PMCID: PMC9970086 DOI: 10.1371/journal.pone.0281320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 01/19/2023] [Indexed: 03/01/2023] Open
Abstract
Transglutaminase (TG) isoforms control diverse normal and pathophysiologic processes through their capacity to cross-link extracellular matrix (ECM) proteins. Their functional and signalling roles in cardiac fibrosis remain poorly understood, despite some evidence of TG2 involvement in abnormal ECM remodelling in heart diseases. In this study, we investigated the role of TG1 and TG2 in mediating fibrotic signalling, collagen cross-linking, and cell proliferation in healthy fibroblasts by siRNA-mediated knockdown. siRNA for TG1, TG2 or negative control was transfected into cultured neonatal rat ventricular fibroblasts and cardiomyocytes. mRNA expression of TGs and profibrotic, proliferation and apoptotic markers was assessed by qPCR. Cell proliferation and soluble and insoluble collagen were determined by ELISA and LC-MS/MS, respectively. TG1 and TG2 were both expressed in neonatal rat cardiomyocytes and fibroblasts before transfection. Other TGs were not detected before and after transfection. TG2 was predominantly expressed and more effectively silenced than TG1. Knocking down TG1 or TG2 significantly modified profibrotic markers mRNA expression in fibroblasts, decreasing connective tissue growth factor (CTGF) and increasing transforming growth factor-β1 compared to the negative siRNA control. Reduced expression of collagen 3A1 was found upon TG1 knockdown, while TG2 knockdown raised α-smooth muscle actin expression. TG2 knockdown further increased fibroblast proliferation and the expression of proliferation marker cyclin D1. Lower insoluble collagen content and collagen cross-linking were evidenced upon silencing TG1 or TG2. Transcript levels of collagen 1A1, fibronectin 1, matrix metalloproteinase-2, cyclin E2, and BCL-2-associated X protein/B-cell lymphoma 2 ratio were strongly correlated with TG1 mRNA expression, whereas TG2 expression correlated strongly with CTGF mRNA abundance. These findings support a functional and signalling role for TG1 and TG2 from fibroblasts in regulating key processes underlying myocardial ECM homeostasis and dysregulation, suggesting that these isoforms could be potential and promising targets for the development of cardiac fibrosis therapies.
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Affiliation(s)
- Doa’a G. F. Al-U’datt
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Carole C. Tranchant
- School of Food Science, Nutrition and Family Studies, Faculty of Health Sciences and Community Services, Université de Moncton, New Brunswick, Canada
| | - Belal Al-Husein
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Roddy Hiram
- Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
- Department of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Mohammad AlQudah
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
- Physiology Department, Arabian Gulf University, Manama, Bahrain
| | - Othman Al-shboul
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Saied Jaradat
- Princess Haya Biotechnology Center, Jordan University of Science and Technology, Irbid, Jordan
| | - Jenan Alqbelat
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Ali Almajwal
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
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Al-U'datt DGF, Tranchant CC, Al-Dwairi A, AlQudah M, Al-Shboul O, Hiram R, Allen BG, Jaradat S, Alqbelat J, Abu-Zaiton AS. Implications of enigmatic transglutaminase 2 (TG2) in cardiac diseases and therapeutic developments. Biochem Pharmacol 2022; 201:115104. [PMID: 35617996 DOI: 10.1016/j.bcp.2022.115104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 05/18/2022] [Accepted: 05/18/2022] [Indexed: 01/07/2023]
Abstract
Cardiac diseases are the leading cause of mortality and morbidity worldwide. Mounting evidence suggests that transglutaminases (TGs), tissue TG (TG2) in particular, are involved in numerous molecular responses underlying the pathogenesis of cardiac diseases. The TG family has several intra- and extracellular functions in the human body, including collagen cross-linking, angiogenesis, cell growth, differentiation, migration, adhesion as well as survival. TGs are thiol- and calcium-dependent acyl transferases that catalyze the formation of a covalent bond between the γ-carboxamide group of a glutamine residue and an amine group, thus increasing the stability, rigidity, and stiffness of the myocardial extracellular matrix (ECM). Excessive accumulation of cross-linked collagen leads to increase myocardial stiffness and fibrosis. Beyond TG2 extracellular protein cross-linking action, mounting evidence suggests that this pleiotropic TG isozyme may also promote fibrotic diseases through cell survival and profibrotic pathway activation at the signaling, transcriptional and translational levels. Due to its multiple functions and localizations, TG2 fulfils critical yet incompletely understood roles in myocardial fibrosis and associated heart diseases, such as cardiac hypertrophy, heart failure, and age-related myocardial stiffness under several conditions. This review summarizes current knowledge and existing gaps regarding the ECM-dependent and ECM-independent roles of TG2 and highlights the therapeutic prospects of targeting TG2 to treat cardiac diseases.
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Affiliation(s)
- Doa'a G F Al-U'datt
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan.
| | - Carole C Tranchant
- School of Food Science, Nutrition and Family Studies, Faculty of Health Sciences and Community Services, Université de Moncton, New Brunswick, Canada
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Mohammad AlQudah
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Othman Al-Shboul
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Roddy Hiram
- Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada; Department of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Bruce G Allen
- Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada; Department of Medicine, Université de Montréal, Montreal, Quebec, Canada; Department of Pharmacology and Physiology, Université de Montréal, Montreal, Quebec, Canada; Department of Biochemistry and Molecular Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Saied Jaradat
- Princess Haya Biotechnology Center, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Jenan Alqbelat
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, 22110, Jordan
| | - Ahmed S Abu-Zaiton
- Department of Biological Sciences, Al al-bayt University, Al-Mafraq, Jordan
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Alqudah M, Al-Shboul O, Al-Dwairi A, Al-U´Dat DG, Alqudah A. Progesterone Inhibitory Role on Gastrointestinal Motility. Physiol Res 2022; 71:193-198. [DOI: 10.33549/physiolres.934824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Progesterone is a steroidal hormone that is produced from the corpus luteum of the ovaries and from the placenta. The main function of progesterone is to promote the secretory differentiation in the endometrium of the uterus and to maintain pregnancy by inhibiting uterine contractions throughout pregnancy. Progesterone performs its actions by activating the classical progesterone nuclear receptors that affect gene transcription and by the non-classical activation of cell surface membrane receptors that accounts for the rapid actions of progesterone. Besides the reproductive roles of progesterone, it exerts functions in many tissues and systems such as the nervous system, the bone, the vascular system, and the gastrointestinal (GI) tract. This review will summarize the recent literature that investigated the role of progesterone in GI tract motility. Most literature indicates that progesterone exerts an inhibitory role on gut smooth muscle cells in part by elevating nitric oxide synthesis, which induces relaxation in smooth muscle. Moreover, progesterone inhibits the signaling pathways that lead to contraction such as Rho kinase inhibition. These data serve as a quick resource for the future directions of progesterone research that could lead to better understanding and more effective treatment of gender-related GI tract motility disorders.
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Affiliation(s)
- M Alqudah
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid, Jordan.
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Al Qudah M, Alfaqih M, Al-Shboul O, Saadeh R, Al-Dwairi A. Effect of cytokine treatment on the expression and secretion of brain derived neurotrophic factor in the smooth muscle of the rat colon. Biomed Rep 2020; 13:55-60. [PMID: 32440350 DOI: 10.3892/br.2020.1302] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/13/2020] [Indexed: 12/16/2022] Open
Abstract
The production of pro-inflammatory cytokines and chemokines is increased during inflammatory bowel disease (IBD). Previously, it was demonstrated that brain derived neurotrophic factor (BDNF) expression is increased in experimental models of colitis. BDNF is partially responsible for the structural and functional changes that take place during IBD. However, the exact mechanisms underlying the upregulation of BDNF during gut inflammation are unknown. The aim of the present study was to determine the effects of direct treatment of smooth muscle cells with inflammatory cytokines on the synthesis and secretion of BDNF. BDNF expression and secretion levels were measured using ELISA kits on tissue lysates and on incubation media used to culture the rat colon smooth muscle tissues treated for 24 h with either tumor necrosis factor (TNF)-α or interleukin (IL)-1β. Compared with the control tissue samples, treatment with TNF-α and IL-1β resulted in a significant increase in the protein expression levels of BDNF in the incubated smooth muscle tissue. TNF-α and IL-1β also stimulated the secretion of BDNF. Chelation of intracellular Ca2+ with BABTA-AM prevented the TNF-α and IL-1β-induced increase in BDNF protein expression and secretion levels. Furthermore, inhibition of protein kinase A (PKA) significantly reduced BDNF expression levels when treated with cytokines but not secretion. In conclusion, proinflammatory cytokines that are upregulated during IBD, directly stimulated BDNF expression and secretion in a Ca2+ dependent manner. Considering the ability of BDNF to enhance smooth muscle contraction and pain sensation, this autocrine loop may partially explain the characteristic hypercontractility and hypersensitivity associated with IBD.
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Affiliation(s)
- Mohammad Al Qudah
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Mahmoud Alfaqih
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Othman Al-Shboul
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Rami Saadeh
- Departments of Public Health, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
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Mustafa AG, Alfaqih MA, Al-Shboul O, Al-Dwairi A. Scavenging of lipid peroxyl radicals protects plasma lipids and proteins from peroxynitrite. Biomed Rep 2018; 9:421-426. [PMID: 30345039 DOI: 10.3892/br.2018.1144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 09/05/2018] [Indexed: 12/12/2022] Open
Abstract
Peroxynitrite can be produced in the vasculature from a superoxide anion reaction with nitric oxide. A surplus of peroxynitrite in the intravascular compartment is a common feature of several chronic diseases. The development of pharmacological modalities that interfere with the formation of peroxynitrite or inhibit its oxidative damage may be of utility for the prevention and/or treatment of several pathologies. Our previous investigations showed that catalytically inactivating peroxynitrite-derived free radicals with tempol or scavenging reactive aldehyde species with phenelzine protects the blood plasma and platelets from the oxidative damage of peroxynitrite. However, the degree of inhibition of the cytotoxic effects of peroxynitrite using tempol or phenelzine was modest. In the present study, the aim was to examine if scavenging lipid peroxyl radicals with U-83836E can achieve superior protection from peroxynitrite. This was assessed by treating blood plasma or platelets with 100 µM peroxynitrite alone or in combination with U-83836E, and then measuring the levels of thiobarbituric acid reactive substances (TBARS) and protein carbonyl formation as indices of lipid peroxidation and protein oxidation, respectively. It was observed that scavenging lipid peroxyl radicals with 75-100 µM U-83836E increasingly reversed protein carbonylation induced by peroxynitrite in blood plasma and platelets, in addition to TBARS formation in blood plasma. These findings are further discussed in the context of the mechanisms by which U-83836E may protect against the cell-damaging effects of peroxynitrite.
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Affiliation(s)
- Ayman G Mustafa
- Department of Anatomy, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Mahmoud A Alfaqih
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Othman Al-Shboul
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
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Fernandes LM, Al-Dwairi A, Simmen RCM, Marji M, Brown DM, Jewell SW, Simmen FA. Malic Enzyme 1 (ME1) is pro-oncogenic in Apc Min/+ mice. Sci Rep 2018; 8:14268. [PMID: 30250042 PMCID: PMC6155149 DOI: 10.1038/s41598-018-32532-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 09/10/2018] [Indexed: 12/13/2022] Open
Abstract
Cytosolic Malic Enzyme (ME1) provides reduced NADP for anabolism and maintenance of redox status. To examine the role of ME1 in tumor genesis of the gastrointestinal tract, we crossed mice having augmented intestinal epithelial expression of ME1 (ME1-Tg mice) with ApcMin/+ mice to obtain male ApcMin/+/ME1-Tg mice. ME1 protein levels were significantly greater within gut epithelium and adenomas of male ApcMin/+/ME1-Tg than ApcMin/+ mice. Male ApcMin/+/ME1-Tg mice had larger and greater numbers of adenomas in the small intestine (jejunum and ileum) than male ApcMin/+ mice. Male ApcMin/+/ME1-Tg mice exhibited greater small intestine crypt depth and villus length in non-adenoma regions, correspondent with increased KLF9 protein abundance in crypts and lamina propria. Small intestines of male ApcMin/+/ME1-Tg mice also had enhanced levels of Sp5 mRNA, suggesting Wnt/β-catenin pathway activation. A small molecule inhibitor of ME1 suppressed growth of human CRC cells in vitro, but had little effect on normal rat intestinal epithelial cells. Targeting of ME1 may add to the armentarium of therapies for cancers of the gastrointestinal tract.
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Affiliation(s)
- Lorenzo M Fernandes
- Interdisciplinary Biomedical Sciences Program, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Ahmed Al-Dwairi
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Rosalia C M Simmen
- Interdisciplinary Biomedical Sciences Program, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
- The Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Meera Marji
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Dustin M Brown
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Sarah W Jewell
- The Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Frank A Simmen
- Interdisciplinary Biomedical Sciences Program, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
- Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
- The Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
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Saadeh N, Alfaqih MA, Mansour H, Khader YS, Saadeh R, Al-Dwairi A, Nusier M. Serum homocysteine is associated with polycystic ovarian syndrome in Jordan. Biomed Rep 2018; 9:439-445. [PMID: 30402228 DOI: 10.3892/br.2018.1149] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 08/28/2018] [Indexed: 11/06/2022] Open
Abstract
Polycystic ovarian syndrome (PCOS) is a prevalent endocrinopathy among women of a reproductive age. Although not included in the diagnostic criteria, insulin resistance (IR) is a major characteristic of PCOS and may contribute to its development. The exact cause of IR remains unknown but appears to be multifactorial. Changes in the levels of leptin, adiponectin, branched-chain amino acids (BCAAs) and/or homocysteine have been reported in women with PCOS. However, the relative contribution of the aforementioned metabolites to PCOS has not been tested in Jordan. In the present study, 154 women diagnosed with PCOS and 151 normally menstruating women matched by age and body mass index (BMI) were recruited. The levels of leptin, adiponectin, BCAAs, homocysteine and 5-methyltetrahydrofolate (5-MTHF) were measured in the serum of the recruited participants. It was revealed that homocysteine levels were significantly elevated in women with PCOS compared with normally menstruating women (P<0.0001), while 5-MTHF (P=0.024), leptin (P=0.027) and adiponectin (P=0.010) levels were significantly lower. In multivariate analysis, serum homocysteine had the strongest association with PCOS and significantly increased its risk [P<0.0001; odds ratio 1.217; 95% confidence interval (CI) 1.157-1.280]. With an area under the curve of 0.855 (95% CI 0.811-0.898) in receiver operating characteristic analysis, serum homocysteine was determined to be a good predictor for PCOS diagnosis based on Rotterdam guidelines. It was concluded that serum levels of homocysteine are elevated in women with PCOS in Jordan independent of age, BMI, or leptin, adiponectin and BCAAs levels.
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Affiliation(s)
- Nesreen Saadeh
- Department of Internal Medicine, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Mahmoud A Alfaqih
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Haneen Mansour
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Yousef S Khader
- Department of Family Medicine and Public Health, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Rami Saadeh
- Department of Family Medicine and Public Health, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Mohamad Nusier
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
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Alfaqih MA, Abu-Khdair Z, Saadeh R, Saadeh N, Al-Dwairi A, Al-Shboul O. Serum Branched Chain Amino Acids Are Associated with Type 2 Diabetes Mellitus in Jordan. Korean J Fam Med 2018; 39:313-317. [PMID: 30060645 PMCID: PMC6166113 DOI: 10.4082/kjfm.17.0122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 01/04/2018] [Accepted: 01/11/2018] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Diabetes mellitus is a global public health problem that is caused by the lack of insulin secretion (type 1) or resistance to its action (type 2). A low insulin-to-glucagon ratio predicts an increase in the serum levels of branched chain amino acids, a feature confirmed in several populations. This relationship has not been assessed in Jordan. The objective of this study was to investigate the association between serum branched chain amino acids and type 2 diabetes mellitus in patients in Jordan. METHODS Two hundred type 2 diabetes mellitus patients and an additional 200 non-diabetic controls were recruited. Age, body mass index, and waist circumference of the subjects were recorded. Branched chain amino acid, total cholesterol, and triglyceride levels were measured from the collected serum samples. RESULTS Serum branched chain amino acid levels were significantly higher in type 2 diabetes mellitus patients than in non-diabetes individuals (P<0.0001). In binomial regression analysis, serum branched chain amino acid levels remained significantly associated with diabetes mellitus and increased its risk (odds ratio, 1.004; 95% confidence interval, 1.001-1.006; P=0.003). CONCLUSION Type 2 diabetes mellitus is associated with higher branched chain amino acid levels in Jordan independent of age, sex, body mass index, waist circumference, and total serum cholesterol and serum triglyceride levels.
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Affiliation(s)
- Mahmoud A. Alfaqih
- Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Zaina Abu-Khdair
- Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Rami Saadeh
- Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Nesreen Saadeh
- Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Ahmed Al-Dwairi
- Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Othman Al-Shboul
- Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
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Al-Dwairi A, Alqudah M, Al-Shboul O, Alfaqih M, Alomari D. Metformin exerts anti-inflammatory effects on mouse colon smooth muscle cells in vitro. Exp Ther Med 2018; 16:985-992. [PMID: 30116349 DOI: 10.3892/etm.2018.6222] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Accepted: 04/20/2018] [Indexed: 02/07/2023] Open
Abstract
Inflammatory bowel disease (IBD) is a chronic incurable condition characterized by relapsing inflammation of the gut. Intestinal smooth muscle cells (SMCs) are affected structurally and functionally during IBD due to excessive production of different inflammatory mediators. Metformin is a widely used antidiabetic agent known to exert several anti-inflammatory effects in different tissues independently from its hypoglycemic effect. The aim of the present study was to investigate the effect of metformin on expression and secretion of different cytokines and chemokines from mouse colon SMCs (CSMCs) following induction of inflammation with lipopolysaccharide (LPS) in vitro. CSMCs from male BALB/c mice were isolated and cultured in Dulbecco's modified Eagle's medium and treated with LPS (1 µg/ml) and 0, 5, 10 or 20 mM metformin for 24 h. Expression and secretion of tumor necrosis factor-α (TNF-α), interleukin-1α (IL-1α), macrophage colony stimulating factor (M-CSF), T cell activation gene-3 (TCA-3) and stromal cell-derived factor-1 (SDF-1) was evaluated by ELISA. LPS-treated CSMCs demonstrated significantly increased expression of TNF-α, IL-1α, M-CSF, TCA-3 and SDF-1 when compared with the control group (P<0.05). Co-treatment with metformin (5 and 10 mM) significantly reduced their expression by ~20-40% when compared with LPS treatment alone (P<0.05). Furthermore, secretion of TNF-α, IL-1α, M-CSF and TCA-3 into the conditioned media was significantly decreased by metformin (5 and 10 mM; P<0.05). In addition, metformin decreased levels of LPS-induced nuclear factor-κB phosphorylation. These data suggest that metformin may provide beneficial anti-inflammatory effects on CSMCs and it may be utilized as an adjunct therapy for patients suffering from IBD.
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Affiliation(s)
- Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Mohammad Alqudah
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Othman Al-Shboul
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Mahmoud Alfaqih
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Dana Alomari
- Faculty of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
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13
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Al-Dwairi A, Alqudah TE, Al-Shboul O, Alqudah M, Mustafa AG, Alfaqih MA. Glucagon-like peptide-1 exerts anti-inflammatory effects on mouse colon smooth muscle cells through the cyclic adenosine monophosphate/nuclear factor-κB pathway in vitro. J Inflamm Res 2018; 11:95-109. [PMID: 29593427 PMCID: PMC5865574 DOI: 10.2147/jir.s152835] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Background Intestinal smooth muscle cells (SMCs) undergo substantial morphological, phenotypic, and contractile changes during inflammatory bowel disease (IBD). SMCs act as a source and target for different inflammatory mediators, however their role in IBD pathogenesis is usually overlooked. Glucagon-like peptide-1 (GLP-1) is an incretin hormone reported to exert multiple anti-inflammatory effects in different tissues including the gastrointestinal tract through various mechanisms. Aim The aim of this research is to explore the effect of GLP-1 analog exendin-4 on the expression and secretion of inflammatory markers from mouse colon smooth muscle cells (CSMCs) after stimulation with lipopolysaccharide (LPS). Materials and methods Freshly isolated CSMCs from male BALB/c mice were cultured in DMEM and treated with vehicle, LPS (1 μg/mL), LPS+exendin-4 (50 nM), or LPS+exendin-4 (100 nM) for 24 h. Expression of inflammatory cytokines was then evaluated by antibody array membrane. Results CSMCs showed basal expression of several cytokines which was enhanced with the induction of inflammation by LPS. However, exendin-4 (50 and 100 nM) significantly (p<0.05) reduced the expression of multiple cytokines including tumor necrosis factor-α (TNF-α), interleukin-1α (IL-1α), T cell activation gene-3 (TCA-3), stromal cell-derived factor-1 (SDF-1), and macrophage colony stimulating factor (M-CSF). To confirm these results, expression of these cytokines was further assessed by enzyme-linked immunosorbent assay and real-time polymerase chain reaction and similar results were also observed. Moreover, secretion of TNF-α and IL1-α into the conditioned media was significantly downregulated by exendin-4 when compared to LPS-treated cells. Furthermore, LPS increased NF-κB phosphorylation, while exendin-4 significantly reduced levels of NF-κB phosphorylation. Conclusion These data indicate that GLP-1 analogs can exert significant anti-inflammatory effects on CSMCs and can potentially be used as an adjunct treatment for inflammatory bowel conditions.
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Affiliation(s)
- Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Tamara E Alqudah
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Othman Al-Shboul
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Mohammad Alqudah
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Ayman G Mustafa
- Department of Anatomy, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| | - Mahmoud A Alfaqih
- Department of Physiology and Biochemistry, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
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Abstract
Neurotrophins are secreted proteins that are synthesized as pre-pro-neurotrophins on the rough endoplasmic reticulum, which are subsequently processed and then secreted as mature proteins. During synthesis, neurotrophins are sorted in the trans-Golgi apparatus into 2 pathways of secretion; the constitutive and the regulated pathways. Neurotrophins in the constitutive pathway are secreted cautiously without any trigger, while in the regulated pathway of secretion an external stimulus elevates the calcium concentration intracellularly leading to neurotrophin release. The regulation of sorting and secretion of neurotrophins is critical for several processes in the body, such as synaptic plasticity, neurodegenerative disorders, demyelination disease, and inflammation. The purpose of this review is to summarize the current mechanisms of neurotrophin sorting and secretion.
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Affiliation(s)
- Mohammad A Al-Qudah
- Department of Physiology, Jordan University of Science and Technology, Irbid, Jordan. E-mail:
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Saha R, Thakkar S, Al-Dwairi A, Gokulan K, Simmen F, Varughese K. Malic enzyme is a target for drug design to combat obesity and cancer. Acta Crystallogr A Found Adv 2014. [DOI: 10.1107/s2053273314091530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The cytosolic malic enzyme (ME1) plays an important role in insulin-induced lipogenesis and has profound effects on colon cancer progression. ME1 generates pyruvate, NADPH and carbon dioxide from malate, a Krebs cycle intermediate. NADPH has an important role in de novo synthesis of long-chain fatty acids whereas pyruvate is cycled back into mitochondria. The pyruvate cycle has been hypothesized to be a necessary component of glucose-stimulated insulin secretion. Increased insulin signaling in liver and adipose tissues leads to higher accumulation of fat mass increasing the risk for obesity. NADPH and fatty acids also support cancer cell proliferation and migration. Thus ME1 may be a suitable drug target to counter obesity and prevent cancer progression. In the current work, computer-aided drug design techniques were used to identify possible ME1 inhibitors with therapeutic value. The software package SYBYL was used for defining the binding pocket and virtual screening was performed to mine through large databases (ZINC-UCSF) containing drug-like molecules in order to identify molecules that could form hydrogen bonds to the enzyme and fit into the active site. The molecules so obtained were then used for docking using the software packages SURFLEX DOCK (SYBYL) and AutoDock Vina (Scripps Research Institute). Lead molecules having minimum binding energy score were identified and two in vitro assays were carried out on the top hit molecules. We tested a total of 11 compounds for activity using an enzyme assay and 4 of these compounds were found to diminish NADPH production significantly. Additionally we performed a cell proliferation assay with colorectal cancer cell line (HCT-116) using the above 4 compounds and three of these compounds exhibited strong activity against cancer cell growth. Supported in part by NIH grant CA136493.
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Rahal OM, Pabona JMP, Kelly T, Huang Y, Hennings LJ, Prior RL, Al-Dwairi A, Simmen FA, Simmen RCM. Suppression of Wnt1-induced mammary tumor growth and lower serum insulin in offspring exposed to maternal blueberry diet suggest early dietary influence on developmental programming. Carcinogenesis 2012; 34:464-74. [PMID: 23144318 DOI: 10.1093/carcin/bgs353] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Despite the well-accepted notion that early maternal influences persist beyond fetal life and may underlie many adult diseases, the risks imposed by the maternal environment on breast cancer development and underlying biological mechanisms remain poorly understood. In this study, we investigated whether early exposure to blueberry (BB) via maternal diet alters oncogene Wnt1-induced mammary tumorigenesis in offspring. Wnt1-transgenic female mice were exposed to maternal Casein (CAS, control) or blueberry-supplemented (CAS + 3%BB) diets throughout pregnancy and lactation. Offspring were weaned to CAS and mammary tumor development was followed until age 8 months. Tumor incidence and latency were similar for both groups; however, tumor weight at killing and tumor volume within 2 weeks of initial detection were lower (by 50 and 60%, respectively) in offspring of BB- versus control-fed dams. Dietary BB exposure beginning at weaning did not alter mammary tumor parameters. Tumors from maternal BB-exposed offspring showed higher tumor suppressor (Pten and Cdh1) and lower proproliferative (Ccnd1), anti-apoptotic (Bcl2) and proangiogenic (Figf, Flt1 and Ephb4) transcript levels, and displayed attenuated microvessel density. Expression of Pten and Cdh1 genes was also higher in mammary tissues of maternal BB-exposed offspring. Mammary tissues and tumors of maternal BB-exposed offspring showed increased chromatin-modifying enzyme Dnmt1 and Ezh2 transcript levels. Body weight, serum insulin and serum leptin/adiponectin ratio were lower for maternal BB-exposed than control tumor-bearing offspring. Tumor weights and serum insulin were positively correlated. Results suggest that dietary influences on the maternal environment contribute to key developmental programs in the mammary gland to modify breast cancer outcome in adult progeny.
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Affiliation(s)
- Omar M Rahal
- Arkansas Children's Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72202, USA
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Al-Dwairi A, Pabona JMP, Simmen RCM, Simmen FA. Cytosolic malic enzyme 1 (ME1) mediates high fat diet-induced adiposity, endocrine profile, and gastrointestinal tract proliferation-associated biomarkers in male mice. PLoS One 2012; 7:e46716. [PMID: 23056418 PMCID: PMC3464285 DOI: 10.1371/journal.pone.0046716] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 09/01/2012] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Obesity and associated hormonal disturbances are risk factors for colon cancer. Cytosolic Malic Enzyme (ME1) generates NADPH used for lipogenesis in gastrointestinal (GI), liver and adipose tissues. We have reported that inclusion of soy protein isolate (SPI) in the diet lowered body fat content and colon tumor incidence of rats fed AIN-93G diet, while others have demonstrated SPI inhibition of rat hepatic ME1 expression. The present study examined the individual and combined effects of dietary SPI and absence of ME1 on: 1) serum concentrations of hormones implicated in colon cancer development, 2) expression of lipogenic and proliferation-associated genes in the mouse colon and small intestine, and 3) liver and adipose expression of lipogenic and adipocytokine genes that may contribute to colon cancer predisposition. METHODS Weanling wild type (WT) and ME1 null (MOD-1) male mice were fed high-fat (HF), iso-caloric diets containing either casein (CAS) or SPI as sole protein source for 5 wks. Somatic growth, serum hormone and glucose levels, liver and adipose tissue weights, GI tissue parameters, and gene expression were evaluated. RESULTS The MOD-1 genotype and SPI-HF diet resulted in decreases in: body and retroperitoneal fat weights, serum insulin, serum leptin, leptin/adiponectin ratio, adipocyte size, colon mTOR and cyclin D1 mRNA abundance, and jejunum FASN mRNA abundance, when compared to WT mice fed CAS-HF. Regardless of diet, MOD-1 mice had reductions in liver weight, liver steatosis, and colon crypt depth, and increases in adipose tissue expression of IRS1 and IRS2, compared to WT mice. SPI-HF diet reduced ME1 gene expression only in retroperitoneal fat. CONCLUSIONS Data suggest that the pharmacological targeting of ME1 or the inclusion of soy protein in the diet may provide avenues to reduce obesity and its associated pro-tumorigenic endocrine environment and improve insulin sensitivity, potentially disrupting the obesity-colon cancer connection.
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Affiliation(s)
- Ahmed Al-Dwairi
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - John Mark P. Pabona
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Arkansas Children’s Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Rosalia C. M. Simmen
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Arkansas Children’s Nutrition Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Frank A. Simmen
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
- * E-mail:
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Al-Dwairi A, Simmen F, Fuchs G, Korourian S, Hakkak R. Dietary modulation of liver lipogenic gene expression in obese female Zucker rats. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1023.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Reza Hakkak
- Dietetics and NutritionUAMSLittle RockAR
- Arkansas Children's Hospital Research InstituteLittle RockAR
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Rahal O, Pabona JMP, Hennings L, Prior RL, Kelly T, Al-Dwairi A, Simmen FA, Simmen RCM. Maternal blueberry diet suppresses Wnt1‐induced mammary tumor progression in offspring. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.128.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Omar Rahal
- University of Arkansas for Medical SciencesLittle RockAR
- Arkansas Children's Nutrition CenterLittle RockAR
| | - John Mark P Pabona
- University of Arkansas for Medical SciencesLittle RockAR
- Arkansas Children's Nutrition CenterLittle RockAR
| | - Leah Hennings
- University of Arkansas for Medical SciencesLittle RockAR
| | | | - Thomas Kelly
- University of Arkansas for Medical SciencesLittle RockAR
| | | | - Frank A Simmen
- University of Arkansas for Medical SciencesLittle RockAR
| | - Rosalia CM Simmen
- University of Arkansas for Medical SciencesLittle RockAR
- Arkansas Children's Nutrition CenterLittle RockAR
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Al-Dwairi A, Brown AR, Simmen RCM, Simmen FA. Abstract 4072: Insulin and NADPH-generating enzymes as molecular targets to repress colon cancer cell proliferation. Cancer Res 2011. [DOI: 10.1158/1538-7445.am2011-4072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
An increasing body of evidence implicates obesity and the attendant hyperinsulinemia as major risk factors for human colorectal cancers. The lipogenic pathway supports growth and survival of colon cancer cells. In particular, inhibition of Fatty Acid Synthase (FASN) or Acetyl-CoA Carboxylase α (ACCα) induces apoptosis of colon cancer cells. The relative involvement in colon cancer initiation, progression and pathogenesis of cytosolic NADPH that is used in lipogenesis remains less clear. In the present study, we have determined the effects of insulin and the involvement of the major NADPH-generating cytosolic enzymes on proliferation of human colon cancer cell lines. Insulin (1-10 nM; to mimic normo- to hyper-insulinemic states) induced a significant increase (7-15%, p < 0.05) in proliferation of HT-29 and HCT-116 colon cancer cell lines in vitro (assayed by MTT assay). Addition of insulin augmented (by 5-10%) proliferation of both cell lines upon concurrent treatment with cancer chemotherapeutic agents (5-fluorouracil, oxaliplatin, irinotecan; each added at a dose < EC50). The insulin-mediated increase in HT-29 cell growth was associated with a 2-3 fold elevation in FASN gene expression and a 50% decrease in expression of the FASN-targeting micro RNAs, miR-103 and miR-107. However, insulin did not induce mRNA abundance for the cytoplasmic NADPH-generating enzymes [Malic Enzyme 1 (ME1), Glucose 6-Phosphate Dehydrogenase (G6PD), 6-Phosphogluconate Dehydrogenase (6PGD), or Isocitrate Dehydrogenase-1 (IDH1]. siRNA-mediated knockdown of FASN or of the individual major cytosolic NADPH-generating enzymes caused decreases in proliferation of HT-29 and HCT-116 cells (15-30%, p < 0.05) compared to the control scrambled siRNA. Data highlight pro-proliferative roles for insulin, FASN and cytosolic NADPH-generating enzymes in colorectal cancer cell growth. Implementation of pharmacologic and/or nutritional means to reduce serum insulin levels, enhance FASN miR expression and inhibit tumor cell NADPH-generation may serve as useful adjuncts for future cancer treatment and prevention. Supported by NIH grant RO1 CA136493 and the Arkansas Biosciences Institute.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 102nd Annual Meeting of the American Association for Cancer Research; 2011 Apr 2-6; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2011;71(8 Suppl):Abstract nr 4072. doi:10.1158/1538-7445.AM2011-4072
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Affiliation(s)
| | - Adam R. Brown
- 1Univ. of Arkansas for Medical Sciences, Little Rock, AR
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