1
|
Nasreldin N, EL-Shoukary RD, Abdel-Raheem GSE, Gharib HS, Zigo F, Farkašová Z, Rehan IF, Senosy W. Effect of mineral-vitamin premix supplementation on behavioral, performance, hormonal, oxidative stress, and serum biochemical profiles on rutting male Camelus dromedarius in Egypt. Front Vet Sci 2023; 10:1221830. [PMID: 37929284 PMCID: PMC10623354 DOI: 10.3389/fvets.2023.1221830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 09/21/2023] [Indexed: 11/07/2023] Open
Abstract
Introduction The rutting period imposes a stressful condition on male camels, which results in elevated serum cortisol levels and alterations in their sexual behavior. Therefore, the current work was carried out to investigate the effect of mineral-vitamin premix supplementation on behavior, reproductive performance, hormones, serum oxidative stress profile, and other serum biochemical parameters of Camelus dromedarius during the breeding season. Methods Fourteen mature, fertile male Camelus dromedarius were divided into two groups, a control group (n = 7) and a mineral-vitamin premix group (n = 7). The present study lasted for 95 days during the rutting period (1st February to 5th May). Each camel in the premix group received a daily diet of 50 g of mineral-vitamin premix throughout the whole rutting period, during which the frequencies and durations of the following behaviors: maintenance, posture, aggressiveness, and sexual activity were collected every 20 min. At the end of the study, blood samples were collected. Results Results revealed that the premix group showed higher (P < 0.05) maintenance (feeding and rumination), standing, and overall sexual desire-related behavior frequency, besides more times (P < 0.001) for rumination, standing, walking, and lying while showing lower (P < 0.001) frequencies of overall aggressive behaviors than the control group. The serum concentration of malondialdehyde, nitric oxide, cortisol, blood glucose, and urea evidenced a significant decrease in the premix group compared with the control one, while significantly elevated levels of reduced glutathione, testosterone, total antioxidant capacity, triiodothyronine, and thyroxin, total protein, albumin, globulin, calcium, phosphorus, potassium, and magnesium were recorded in the premix group in comparison with the control. Conclusion It could be concluded that daily dietary supplementation of 50 g of mineral-vitamin premix to male camels during the breeding season is necessary to overcome the oxidative stress and serum cortisol concentration with a subsequent decrease in aggressive behavior and improvement to testosterone level in blood, body condition score and body weight gain.
Collapse
Affiliation(s)
- Nani Nasreldin
- Department of Pathology and Clinical Pathology, Faculty of Veterinary Medicine, New Valley University, El-Kharga, Egypt
| | - Ramadan D. EL-Shoukary
- Department of Development of Animal Wealth, Faculty of Veterinary Medicine, New Valley University, El-Kharga, Egypt
| | - Ghada S. E. Abdel-Raheem
- Departments of Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Assiut University, Asyut, Egypt
| | - Heba S. Gharib
- Department of Behaviour and Management of Animal, Poultry and Aquatic, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - František Zigo
- Department of Nutrition and Animal Husbandry, University of Veterinary Medicine and Pharmacy, Košice, Komenského, Slovakia
| | - Zuzana Farkašová
- Department of Nutrition and Animal Husbandry, University of Veterinary Medicine and Pharmacy, Košice, Komenského, Slovakia
| | - Ibrahim F. Rehan
- Department of Husbandry and Development of Animal Wealth, Faculty of Veterinary Medicine, Menoufia University, Shebin Alkom, Menoufia, Egypt
- Department of Pathobiochemistry, Faculty of Pharmacy, Meijo University, Nagoya-shi, Japan
| | - Waleed Senosy
- Department of Theriogenology, Faculty of Veterinary Medicine, New Valley University, El-Kharga, Egypt
| |
Collapse
|
2
|
Bagyánszki M, Bódi N. Key elements determining the intestinal region-specific environment of enteric neurons in type 1 diabetes. World J Gastroenterol 2023; 29:2704-2716. [PMID: 37274063 PMCID: PMC10237112 DOI: 10.3748/wjg.v29.i18.2704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/28/2023] [Accepted: 04/17/2023] [Indexed: 05/11/2023] Open
Abstract
Diabetes, as a metabolic disorder, is accompanied with several gastrointestinal (GI) symptoms, like abdominal pain, gastroparesis, diarrhoea or constipation. Serious and complex enteric nervous system damage is confirmed in the background of these diabetic motility complaints. The anatomical length of the GI tract, as well as genetic, developmental, structural and functional differences between its segments contribute to the distinct, intestinal region-specific effects of hyperglycemia. These observations support and highlight the importance of a regional approach in diabetes-related enteric neuropathy. Intestinal large and microvessels are essential for the blood supply of enteric ganglia. Bidirectional morpho-functional linkage exists between enteric neurons and enteroglia, however, there is also a reciprocal communication between enteric neurons and immune cells on which intestinal microbial composition has crucial influence. From this point of view, it is more appropriate to say that enteric neurons partake in multidirectional communication and interact with these key players of the intestinal wall. These interplays may differ from segment to segment, thus, the microenvironment of enteric neurons could be considered strictly regional. The goal of this review is to summarize the main tissue components and molecular factors, such as enteric glia cells, interstitial cells of Cajal, gut vasculature, intestinal epithelium, gut microbiota, immune cells, enteroendocrine cells, pro-oxidants, antioxidant molecules and extracellular matrix, which create and determine a gut region-dependent neuronal environment in diabetes.
Collapse
Affiliation(s)
- Mária Bagyánszki
- Department of Physiology, Anatomy and Neuroscience, Faculty of Science and Informatics, University of Szeged, Szeged H-6726, Hungary
| | - Nikolett Bódi
- Department of Physiology, Anatomy and Neuroscience, Faculty of Science and Informatics, University of Szeged, Szeged H-6726, Hungary
| |
Collapse
|
3
|
Simonyan RM, Simonyan KV, Simonyan GM, Khachatryan HS, Babayan MA, Danielyan MH, Darbinyan LV, Simonyan MA. Superoxide-producing thermostable associate from the small intestines of control and alloxan-induced diabetic rats: quantitative and qualitative changes. BMC Endocr Disord 2022; 22:250. [PMID: 36258207 PMCID: PMC9580182 DOI: 10.1186/s12902-022-01160-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 09/28/2022] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND NADPH oxidase 1 (Nox1), which is highly expressed in the colon, is thought to play a potential role in host defense as a physical and innate immune barrier against commensal or pathogenic microbes in the gastrointestinal epithelium. Diabetes can be caused by several biological factors, including insulin resistance is one of them. Alloxan is widely used to induce insulin-dependent diabetes in experimental animals. Alloxan increases the generation of reactive oxygen species as a result of metabolic reactions in the body, along with a massive increase in cytosolic calcium concentration. METHODS Using a universal method, a superoxide radical (О2-)-thermostable associate between NADPH-containing lipoprotein (NLP) and NADPH oxidase (Nox)- NLP-Nox was isolated and purified from the small intestine (SI) of control (C) and alloxan-induced diabetic (AD) albino rats. RESULTS In comparison to the C indices, in AD in the SI, an increase in the specific content of NLP-Nox associate and a decrease in the stationary concentration of produced О2- in liquid phase (in solution) and gas phase (during blowing by oxygen of the NLP-Nox solution) were observed. The NLP-Nox of SI associate in C and AD rats produced О2- by an immediate mechanism, using NLP as a substrate. The phenomenon of the hiding of the optical absorption maxima of the Nox in oxidized states at pH10,5 was observed in the composition of these SI associates of the C and AD rat groups. The characteristic absorption maxima of the «hidden» Nox were observed under these conditions after reduction by potassium dithionite. CONCLUSION Thus, at AD, the decrease in the stationary concentration of produced О2- in the solution and gas phase was compensated for by an increase in the specific amount of associate. In addition, the decrease in the stationary concentration of produced О2- by NLP-Nox associates at AD can be linked to a decrease in the level of NADPH in NLP-Nox composition. This could be used as a new mechanism of AD pathogenesis.
Collapse
Affiliation(s)
- R M Simonyan
- H. Buniatyan Institute of Biochemistry NAS RA, 0014, Yerevan, Armenia
| | - K V Simonyan
- Neuroendocrine Relationships Lab, Orbeli Institute of Physiology NAS RA, 0028, Yerevan, Armenia.
| | - G M Simonyan
- H. Buniatyan Institute of Biochemistry NAS RA, 0014, Yerevan, Armenia
| | - H S Khachatryan
- H. Buniatyan Institute of Biochemistry NAS RA, 0014, Yerevan, Armenia
| | - M A Babayan
- H. Buniatyan Institute of Biochemistry NAS RA, 0014, Yerevan, Armenia
| | - M H Danielyan
- Histochemistry and Electron microscopy Lab, Orbeli Institute of Physiology NAS RA, 0028, Yerevan, Armenia
| | - L V Darbinyan
- Sensorimotor Integration Lab, Orbeli Institute of Physiology NAS RA, 0028, Yerevan, Armenia
| | - M A Simonyan
- H. Buniatyan Institute of Biochemistry NAS RA, 0014, Yerevan, Armenia
| |
Collapse
|
4
|
Attenuation of diabetic retinopathy and neuropathy by resveratrol: Review on its molecular mechanisms of action. Life Sci 2020; 245:117350. [PMID: 31982401 DOI: 10.1016/j.lfs.2020.117350] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 01/13/2020] [Accepted: 01/21/2020] [Indexed: 12/16/2022]
Abstract
Resveratrol is an important phenolic phytochemical from the therapeutic perspective. It has therapeutic impacts over wide range of diseases, especially the ones related to oxidative stress. Resveratrol, being primarily a potent anti-oxidant phytochemical, has significant impact against major diseases as inflammatory disorders, diabetes, and cancer. In the current review article, we intend to highlight the molecular aspects of the mechanism of action of resveratrol against major diabetic implications, namely, retinopathy and neuropathy. Both these diabetic implications are among the first fallouts of chronic hyperglycaemia. Resveratrol, via multiple molecular pathways, tend to attenuate and reverse these deformity and other disease-causing implications.
Collapse
|
5
|
|
6
|
Tang D, Wu J, Jiao H, Wang X, Zhao J, Lin H. The development of antioxidant system in the intestinal tract of broiler chickens. Poult Sci 2019; 98:664-678. [PMID: 30289502 DOI: 10.3382/ps/pey415] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 09/25/2018] [Indexed: 01/03/2023] Open
Abstract
The gastrointestinal tract is the site for the uptake of nutrients from the external environment. We hypothesized that the antioxidant system in the intestinal tract has a vital protective role from the oxidative damage induced by oxidants in foods. The aim of this study was to investigate the development of the antioxidant system in the intestine of chickens. The activity and gene expression of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) and the content of the non-enzymatic substance glutathione (GSH) were measured in the duodenum, jejunum, and ileum of chickens at 1, 3, 7, 11, 14, 21, 35, and 42 d of age. The results showed that the small intestinal tract had relatively higher SOD activity and GSH concentration and lower CAT and GSH-Px activities, compared with those of other visceral organs. CAT and GSH-Px activities and GSH concentration showed a decreasing trend with age, whereas SOD activity was not significantly influenced by age. The gene expression of SOD1, SOD2, and GSH-Px7 showed a dramatic decrease from 3 d of age. The results indicated that SOD and GSH were highly expressed in the first week of age after hatching. To conclude, the results suggest that SOD and GSH play a vital protective role in the small intestine after hatching, which contributes to rapid development of the intestine.
Collapse
Affiliation(s)
- Dazhi Tang
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Jianmin Wu
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Hongchao Jiao
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Xiaojuan Wang
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Jingpeng Zhao
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Hai Lin
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| |
Collapse
|
7
|
Resveratrol promotes neuroprotection and attenuates oxidative and nitrosative stress in the small intestine in diabetic rats. Biomed Pharmacother 2018; 105:724-733. [PMID: 29906751 DOI: 10.1016/j.biopha.2018.06.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 06/05/2018] [Accepted: 06/07/2018] [Indexed: 12/12/2022] Open
Abstract
Damages to the enteric nervous system caused by diabetes mellitus (DM) are frequently attributed to oxidative and nitrosative stress. We aimed to investigate the effect of Resveratrol (RSV) (10 mg/kg) on oxidative and nitrosative stress in the intestinal wall and morphoquantitative aspects of the myenteric plexus of the duodenum, jejunum and ileum in diabetic rats. Twenty-four rats were distributed into four groups (n = 6/group): control (C group), control treated with RSV (CR group), diabetic (D group), and diabetic treated with RSV (DR group) for 120 days. Immunohistochemical staining techniques for the general neuronal population, nitrergic and calretinin neuronal subpopulations, enteric glial cells and glial fibrillary acid protein were performed in the myenteric plexus. Furthermore, parameters of oxidative and nitrosative stress were analyzed in the intestinal wall. RSV attenuated oxidative and nitrosative stress and prevented neuronal loss and hypertrophy of the HuC/D-IR, nNOS-IR and CALR-IR neuronal subpopulations in the DR group compared with the D group (P < 0.05). In addition, RSV prevented the increase in glial fibrillary acid protein fluorescence in the DR group compared with the D (P < 0.05). These results suggest that RSV has antioxidant and neuroprotective effects in myenteric plexus in rats with experimental DM.
Collapse
|
8
|
Pongkan W, Takatori O, Ni Y, Xu L, Nagata N, Chattipakorn SC, Usui S, Kaneko S, Takamura M, Sugiura M, Chattipakorn N, Ota T. β-Cryptoxanthin exerts greater cardioprotective effects on cardiac ischemia-reperfusion injury than astaxanthin by attenuating mitochondrial dysfunction in mice. Mol Nutr Food Res 2017; 61. [PMID: 28544535 DOI: 10.1002/mnfr.201601077] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 05/04/2017] [Accepted: 05/15/2017] [Indexed: 11/07/2022]
Abstract
SCOPE β-Cryptoxanthin and astaxanthin are antioxidant carotenoid pigments that inhibit lipid peroxidation as potently as vitamin E. We hypothesized that acute treatment with β-cryptoxanthin and astaxanthin causes similar reductions in the sizes of cardiac infarcts caused by ischemia-reperfusion (I/R) injury by attenuating oxidative stress and cardiac mitochondrial dysfunction. METHODS AND RESULTS C57BL/6 mice (n = 36) were randomized to receive vehicle, β-cryptoxanthin, astaxanthin, or vitamin E at 50 mg/kg by gavage feeding prior to I/R injury. Cardiac I/R was induced by left anterior descending coronary artery ligation followed by reperfusion. All treatments significantly reduced infarct sizes by 36-57%, attenuated apoptosis and also attenuated cardiac mitochondrial dysfunction in the treated groups compared to the control group. Although astaxanthin and vitamin E exhibited similar efficacy with respect to cardioprotection, β-cryptoxanthin exhibited greater efficacy than its counterparts, as it reduced infarct sizes by 60%. β-Cryptoxanthin was more effective than astaxanthin and vitamin E because it reduced cardiac mitochondrial swelling, mitochondrial depolarization, the Bax/Bcl-2 ratio, and plasma and cardiac thiobarbituric acid reactive substances levels more significantly than its counterparts. CONCLUSION Acute β-cryptoxanthin treatment exhibits greater cardioprotective efficacy against I/R injury than astaxanthin and vitamin E by reducing infarct sizes and attenuating apoptosis, oxidative stress, and mitochondrial dysfunction.
Collapse
Affiliation(s)
- Wanpitak Pongkan
- Department of Cell Metabolism and Nutrition, Brain/Liver Interface Medicine Research Center, Kanazawa University, Kanazawa, Japan.,Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Osamu Takatori
- Department of System Biology, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| | - Yinhua Ni
- Department of Cell Metabolism and Nutrition, Brain/Liver Interface Medicine Research Center, Kanazawa University, Kanazawa, Japan
| | - Liang Xu
- Department of Cell Metabolism and Nutrition, Brain/Liver Interface Medicine Research Center, Kanazawa University, Kanazawa, Japan
| | - Naoto Nagata
- Department of Cell Metabolism and Nutrition, Brain/Liver Interface Medicine Research Center, Kanazawa University, Kanazawa, Japan
| | - Siriporn C Chattipakorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand.,Department of Oral Biology and Diagnostic Science, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Soichiro Usui
- Department of System Biology, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| | - Shuichi Kaneko
- Department of System Biology, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| | - Masayuki Takamura
- Department of System Biology, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| | - Minoru Sugiura
- Citrus Research Division, NARO Institute of Fruit Tree Science, National Agriculture and Food Research Organization, Shizuoka, Shizuoka, Japan
| | - Nipon Chattipakorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Cardiac Electrophysiology Unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Tsuguhito Ota
- Department of Cell Metabolism and Nutrition, Brain/Liver Interface Medicine Research Center, Kanazawa University, Kanazawa, Japan.,Department of System Biology, Kanazawa University Graduate School of Medical Science, Kanazawa, Ishikawa, Japan
| |
Collapse
|
9
|
Botchlett R, Woo SL, Liu M, Pei Y, Guo X, Li H, Wu C. Nutritional approaches for managing obesity-associated metabolic diseases. J Endocrinol 2017; 233:R145-R171. [PMID: 28400405 PMCID: PMC5511693 DOI: 10.1530/joe-16-0580] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 04/11/2017] [Indexed: 01/10/2023]
Abstract
Obesity is an ongoing pandemic and serves as a causal factor of a wide spectrum of metabolic diseases including diabetes, fatty liver disease, and cardiovascular disease. Much evidence has demonstrated that nutrient overload/overnutrition initiates or exacerbates inflammatory responses in tissues/organs involved in the regulation of systemic metabolic homeostasis. This obesity-associated inflammation is usually at a low-grade and viewed as metabolic inflammation. When it exists continuously, inflammation inappropriately alters metabolic pathways and impairs insulin signaling cascades in peripheral tissues/organs such as adipose tissue, the liver and skeletal muscles, resulting in local fat deposition and insulin resistance and systemic metabolic dysregulation. In addition, inflammatory mediators, e.g., proinflammatory cytokines, and excessive nutrients, e.g., glucose and fatty acids, act together to aggravate local insulin resistance and form a vicious cycle to further disturb the local metabolic pathways and exacerbate systemic metabolic dysregulation. Owing to the critical role of nutrient metabolism in controlling the initiation and progression of inflammation and insulin resistance, nutritional approaches have been implicated as effective tools for managing obesity and obesity-associated metabolic diseases. Based on the mounting evidence generated from both basic and clinical research, nutritional approaches are commonly used for suppressing inflammation, improving insulin sensitivity, and/or decreasing fat deposition. Consequently, the combined effects are responsible for improvement of systemic insulin sensitivity and metabolic homeostasis.
Collapse
Affiliation(s)
- Rachel Botchlett
- Department of Nutrition and Food ScienceTexas A&M University, College Station, USA
- Pinnacle Clinical ResearchLive Oak, USA
| | - Shih-Lung Woo
- Department of Nutrition and Food ScienceTexas A&M University, College Station, USA
| | - Mengyang Liu
- Department of Nutrition and Food ScienceTexas A&M University, College Station, USA
| | - Ya Pei
- Department of Nutrition and Food ScienceTexas A&M University, College Station, USA
| | - Xin Guo
- Department of Nutrition and Food ScienceTexas A&M University, College Station, USA
- Baylor College of MedicineHouston, USA
| | - Honggui Li
- Department of Nutrition and Food ScienceTexas A&M University, College Station, USA
| | - Chaodong Wu
- Department of Nutrition and Food ScienceTexas A&M University, College Station, USA
| |
Collapse
|
10
|
Yang B, Chen W, Jin J, Mei Y, Wang X, Chen H, Yan S, Ru M, Gu G, Deng X, Qian H, Huang W. Evaluation of Hypoglycemic and Antioxidative Effects of Synthesized Peptide MC62. Chem Biol Drug Des 2013; 82:99-105. [DOI: 10.1111/cbdd.12137] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 02/27/2013] [Accepted: 03/18/2013] [Indexed: 11/26/2022]
Affiliation(s)
- Baowei Yang
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | | | - Jing Jin
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Yicheng Mei
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Xuekun Wang
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Hong Chen
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Sijia Yan
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Meng Ru
- Traditional Medicine College; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Guolong Gu
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Xin Deng
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Hai Qian
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| | - Wenlong Huang
- Center of Drug Discovery; State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tongjiaxiang; Nanjing; 210009; China
| |
Collapse
|
11
|
Alireza S, Leila N, Siamak S, Mohammad-Hasan KA, Behrouz I. Effects of vitamin E on pathological changes induced by diabetes in rat lungs. Respir Physiol Neurobiol 2012; 185:593-9. [PMID: 23247385 DOI: 10.1016/j.resp.2012.11.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 11/05/2012] [Accepted: 11/29/2012] [Indexed: 01/15/2023]
Abstract
Twenty-fourmale rats were divided into three groups: Control (C), non-treated diabetic (NTD), and vitamin E-treated diabetic (VETD) groups. After 6 weeks, we evaluated the changes in the alveolar epithelium, alveolar septum thickness, Hcy, and cathepsin G levels in the lung tissue and plasma serine protease inhibitor levels.The results revealed a significant increase in alveolar septum thickness, a high number of type II pneumocytes, high number of glycogen granules, increased vascular elastic membrane thickness, and increased Hcy and cathepsin G levels in the diabetic rats. Plasma level of serine protease inhibitors showed a significant decrease in the NTD animals. The vitamin E-treated rats showed significant amelioration of lung tissue changes, as well as restoration of high cathepsin G, Hcy levels, and serine protease inhibitors when compared to the control rats. These results suggest that diabetes induces lung tissue changes that may be stimulated by Hcy and cathepsin G mediated oxidative stress by, and protective effect could be achieved by using vitamin E.
Collapse
Affiliation(s)
- Shirpoor Alireza
- Department of Physiology, Faculty of Medicine, Urmia Medical University, Urmia, Iran.
| | | | | | | | | |
Collapse
|
12
|
Shirpoor A, Khadem Ansari MH, Heshmatian B, Ilkhanizadeh B, Noruzi L, Abdollahzadeh N, Saboory E. Decreased blood pressure with a corresponding decrease in adhesive molecules in diabetic rats caused by vitamin E administration. J Diabetes 2012; 4:362-8. [PMID: 22236396 DOI: 10.1111/j.1753-0407.2012.00184.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Hypertension is one of the important clinical problems of diabetic cardiovascular disease. The aim of this study was to determine the effect of vitamin E on blood pressure parameters and adhesive molecule amounts in diabetic rats. METHODS Twenty-four male Wistar rats were divided into three groups (each of n = 8): the controls (C), non-treated diabetic (NTD), and vitamin E treated diabetic (VETD) groups. A single intraperitoneal injection of buffered streptozotocin (60 mg/kg) in cold sodium citrate (pH 4.5) was used to induce diabetes. The VETD group received 300 mg of vitamin E daily intragastrically for 6 weeks. Systolic and diastolic blood pressure, mean arterial pressure, as well as the dicrotic pressure, crest time, systolic and diastolic periods, and plasma levels of intercellular adhesion molecule-1 and E-selectin were measured after 6 weeks. RESULTS The results revealed that there was a significant increase in systolic and diastolic blood pressures, mean arterial pressure, crest time, systolic duration, and the amount of sICAM-1 and E-selectin in diabetic rats. There was no significant difference in the heart rate or cardiac cyclic duration among the different groups. Significant improvement of blood pressure parameters as well as attenuation of the elevated ICAM-1 and E-selectin amounts was found in the vitamin E treated group. CONCLUSIONS These findings indicate that vitamin E significantly improved blood pressure elevation in diabetic rats and that these effects could be associated with reducing adhesive molecule and antioxidant properties of vitamin E.
Collapse
Affiliation(s)
- Alireza Shirpoor
- Department of Physiology, Faculty of Medicine, Urmia Medical University, Urmia, Iran.
| | | | | | | | | | | | | |
Collapse
|
13
|
Neuroprotective effect of quercetin on the duodenum enteric nervous system of streptozotocin-induced diabetic rats. Dig Dis Sci 2012; 57:3106-15. [PMID: 22878915 DOI: 10.1007/s10620-012-2300-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 06/15/2012] [Indexed: 12/12/2022]
Abstract
BACKGROUND In diabetes mellitus (DM), hyperglycemia promotes changes in biochemical mechanisms that induce oxidative stress. Oxidative stress has been closely linked to adverse consequences that affect the function of the gastrointestinal tract caused by injuries to the enteric nervous system (ENS) that in turn cause neurodegeneration and enteric glial loss. Therapeutic approaches have shown that diet supplementation with antioxidants, such as quercetin, reduce oxidative stress. AIMS This work sought to evaluate neurons and enteric glial cells in the myenteric and submucosal plexuses of the duodenum in diabetic rats supplemented with quercetin. METHODS The duodenum of 24 rats, including a control group (C), control quercetin supplementation group (CQ), diabetic group (D), and diabetic quercetin supplementation group (DQ), were used to investigate whole mounts of muscular and submucosal layers subjected to immunohistochemistry to detect vasoactive intestinal peptide in the myenteric layer and double-staining for HuC-D/neuronal nitric oxide synthase (nNOS) and HuC-D/S100. RESULTS A reduction of the general neuronal population (HuC/D) was found in the myenteric and submucosal plexuses (p < 0.001) in the D and DQ groups. The nitrergic subpopulation (nNOS) decreased only in the myenteric plexus (p < 0.001), and glial cells decreased in both plexuses (p < 0.001) in the D and DQ groups. In diabetic rats, quercetin supplementation reduced neuronal and glial loss. Diabetes promoted an increase in the cell body area of both the general and nitrergic populations. Quercetin supplementation only prevented neuronal hypertrophy in the general population. CONCLUSION Supplementation with quercetin eased the damage caused by diabetes, promoting a neuroprotective effect and reducing enteric glial loss in the duodenum.
Collapse
|
14
|
Erejuwa OO, Sulaiman SA, Wahab MSA. Honey--a novel antidiabetic agent. Int J Biol Sci 2012; 8:913-34. [PMID: 22811614 PMCID: PMC3399220 DOI: 10.7150/ijbs.3697] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2011] [Accepted: 01/24/2012] [Indexed: 12/26/2022] Open
Abstract
Diabetes mellitus remains a burden worldwide in spite of the availability of numerous antidiabetic drugs. Honey is a natural substance produced by bees from nectar. Several evidence-based health benefits have been ascribed to honey in the recent years. In this review article, we highlight findings which demonstrate the beneficial or potential effects of honey in the gastrointestinal tract (GIT), on the gut microbiota, in the liver, in the pancreas and how these effects could improve glycemic control and metabolic derangements. In healthy subjects or patients with impaired glucose tolerance or diabetes mellitus, various studies revealed that honey reduced blood glucose or was more tolerable than most common sugars or sweeteners. Pre-clinical studies provided more convincing evidence in support of honey as a potential antidiabetic agent than clinical studies did. The not-too-impressive clinical data could mainly be attributed to poor study designs or due to the fact that the clinical studies were preliminary. Based on the key constituents of honey, the possible mechanisms of action of antidiabetic effect of honey are proposed. The paper also highlights the potential impacts and future perspectives on the use of honey as an antidiabetic agent. It makes recommendations for further clinical studies on the potential antidiabetic effect of honey. This review provides insight on the potential use of honey, especially as a complementary agent, in the management of diabetes mellitus. Hence, it is very important to have well-designed, randomized controlled clinical trials that investigate the reproducibility (or otherwise) of these experimental data in diabetic human subjects.
Collapse
Affiliation(s)
- Omotayo O Erejuwa
- Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia.
| | | | | |
Collapse
|
15
|
Erejuwa OO, Sulaiman SA, Ab Wahab MS. Honey: a novel antioxidant. Molecules 2012; 17:4400-23. [PMID: 22499188 PMCID: PMC6268297 DOI: 10.3390/molecules17044400] [Citation(s) in RCA: 150] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Revised: 03/30/2012] [Accepted: 04/01/2012] [Indexed: 01/11/2023] Open
Abstract
The global prevalence of chronic diseases such as diabetes mellitus, hypertension, atherosclerosis, cancer and Alzheimer's disease is on the rise. These diseases, which constitute the major causes of death globally, are associated with oxidative stress. Oxidative stress is defined as an "imbalance between oxidants and antioxidants in favor of the oxidants, potentially leading to damage". Individuals with chronic diseases are more susceptible to oxidative stress and damage because they have elevated levels of oxidants and/or reduced antioxidants. This, therefore, necessitates supplementation with antioxidants so as to delay, prevent or remove oxidative damage. Honey is a natural substance with many medicinal effects such as antibacterial, hepatoprotective, hypoglycemic, reproductive, antihypertensive and antioxidant effects. This review presents findings that indicate honey may ameliorate oxidative stress in the gastrointestinal tract (GIT), liver, pancreas, kidney, reproductive organs and plasma/serum. Besides, the review highlights data that demonstrate the synergistic antioxidant effect of honey and antidiabetic drugs in the pancreas, kidney and serum of diabetic rats. These data suggest that honey, administered alone or in combination with conventional therapy, might be a novel antioxidant in the management of chronic diseases commonly associated with oxidative stress. In view of the fact that the majority of these data emanate from animal studies, there is an urgent need to investigate this antioxidant effect of honey in human subjects with chronic or degenerative diseases.
Collapse
Affiliation(s)
- Omotayo O Erejuwa
- Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
| | | | | |
Collapse
|
16
|
Karatug A, Bolkent S. The potential role of combined antioxidant treatment on pancreas of STZ-diabetic mice. ACTA ACUST UNITED AC 2011; 65:255-62. [PMID: 21968281 DOI: 10.1016/j.etp.2011.08.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 08/08/2011] [Accepted: 08/30/2011] [Indexed: 12/25/2022]
Abstract
In diabetes, cells and tissues are damaged due to the imbalance between production of free radicals and removal of them. The effective biologic antioxidants for oxidative stress such as α-lipoic acid, vitamin E and selenium are effective in diminishing oxidative damage such as membrane lipid peroxidation. The experiment aimed to investigate the oxidative stress occurring in mitochondrial and cytoplasmic fraction of pancreatic tissues in streptozotocin-diabetic mice and the possible effects of α-lipoic acid + vitamin E + selenium combination on oxidative damage and antioxidative system by using microscopic and biochemical methods. The mice were divided into five groups. These groups were treated by citrate buffer, the solvents of the antioxidants, combined the antioxidants [α-lipoic acid (50 mg/kg), vitamin E (100 mg/kg), selenium (0.25 mg/kg)], streptozotocin (40 mg/kg × 5), combined the antioxidants and streptozotocin. The mice were sacrificed by cervical dislocation. In the experimental group given combined antioxidants following results were observed compared to diabetic group: increased percent insulin-positive cell area; decreased blood glucose levels; increased manganase superoxide dismutase activities and unsignificantly increased superoxide dismutase activities; unsignificantly decreased lipid peroxidase levels in both of fraction; unsignificantly decreased in mitochondrial fraction and unsignificantly increased in cytosolic fraction for catalase levels; not any alteration glutathione levels; not any activity in both of fraction for glutathione peroxidase. We can say that by taking the blood glucose levels and immunohistochemical results into account, the combination of triple antioxidants has a partly positive effect on diabetes. This positive effect could increase when trying different doses of combined antioxidant treatment.
Collapse
Affiliation(s)
- Ayse Karatug
- Istanbul University, Faculty of Science, Department of Biology, 34134 Vezneciler, Istanbul, Turkey.
| | | |
Collapse
|
17
|
Vaz JA, Barros L, Martins A, Santos-Buelga C, Vasconcelos MH, Ferreira IC. Chemical composition of wild edible mushrooms and antioxidant properties of their water soluble polysaccharidic and ethanolic fractions. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.11.063] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
18
|
Wu YL, Huang J, Liu J, Jin MF, Gu M, Hong Y, Wu ZR. Protective effect of recombinant human glucagon-like peptide-1 (rhGLP-1) pretreatment in STZ-induced diabetic mice. J Pept Sci 2011; 17:499-504. [PMID: 21495117 DOI: 10.1002/psc.1352] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Revised: 11/18/2010] [Accepted: 12/07/2010] [Indexed: 01/19/2023]
Abstract
Human glucagon-like peptide-1 (hGLP-1) and its mimetics have emerged as therapies for type 2 diabetes. However, clinical treatment of diabetes with hGLP-1 is ineffective because of rapid DPPIV-mediated hGLP-1 degradation in the circulation. In this study, we investigated the protective effect of recombinant human glucagon-like peptide-1 (rhGLP-1) treatment on STZ-induced diabetic mice. Mice were treated daily with rhGLP-1 (24 nmol/kg body weight) starting before or after STZ injection (40 mg/kg body weight) to induce diabetes. Mice pretreated with rhGLP-1 before but not after STZ showed significantly reduced blood glucose levels (P < 0.05), increased oral glucose tolerance (area under the curve, 1740 ± 71.18 vs 2416 ± 205.6, P < 0.05). Furthermore, the bioproduct of lipid peroxidation, MDA, was reduced and SOD and GSH-PX activities were enhanced globally and in pancreas of mice that received rhGLP-1 pretreatment before STZ, when comparing with STZ-treated mice. Finally, STZ-induced pancreatic islet damage was rescued by rhGLP-1 pretreatment. Taken together, the results of this study demonstrate that rhGLP-1 pretreatment has a protective effect against STZ-induced diabetes in mice. These findings suggest that the GLP-1 pretreatment may be a new therapeutic strategy in the preventive and protective treatment during diabetes initiation and progression.
Collapse
Affiliation(s)
- Ye-Lin Wu
- School of Life Science, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | | | | | | | | | | | | |
Collapse
|
19
|
Silva GGPD, Zanoni JN, Buttow NC. Neuroprotective action of Ginkgo biloba on the enteric nervous system of diabetic rats. World J Gastroenterol 2011; 17:898-905. [PMID: 21412498 PMCID: PMC3051139 DOI: 10.3748/wjg.v17.i7.898] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 03/24/2010] [Accepted: 03/31/2010] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of Ginkgo biloba extract on the enteric neurons in the small intestine of diabetic rats.
METHODS: Fifteen Wistar rats were divided into three groups: control group (C), diabetic group (D) and diabetic-treated (DT) daily with EGb 761 extract (50 mg/kg body weight) for 120 d. The enteric neurons were identified by the myosin-V immunohistochemical technique. The neuronal density and the cell body area were also analyzed.
RESULTS: There was a significant decrease in the neuronal population (myenteric plexus P = 0.0351; submucous plexus P = 0.0217) in both plexuses of the jejunum in group D when compared to group C. With regard to the ileum, there was a significant decrease (P = 0.0117) only in the myenteric plexus. The DT group showed preservation of the neuronal population in the jejunum submucous plexus and in the myenteric plexus in the ileum. The cell body area in group D increased significantly (P = 0.0001) in the myenteric plexus of both segments studied as well as in the ileum submucosal plexus, when compared to C. The treatment reduced (P = 0.0001) the cell body area of the submucosal neurons of both segments and the jejunum myenteric neurons.
CONCLUSION: The purified Ginkgo biloba extract has a neuroprotective effect on the jejunum submucous plexus and the myenteric plexus of the ileum of diabetic rats.
Collapse
|
20
|
Vigueras-Villaseñor RM, Ojeda I, Gutierrez-Pérez O, Chavez-Saldaña M, Cuevas O, Maria DS, Rojas-Castañeda JC. Protective effect of α-tocopherol on damage to rat testes by experimental cryptorchidism. Int J Exp Pathol 2011; 92:131-9. [PMID: 21314742 DOI: 10.1111/j.1365-2613.2010.00757.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
It is thought that the degeneration of germ cells associated with an increase in the temperature due to cryptorchidism involves oxidative stress. α-Tocopherol is a powerful antioxidant that prevents oxidation of polyunsaturated fats found in membranes and stabilizes peroxyl radicals. For this reason we were interested in determining the role of α-Tocopherol using experimental cryptorchidism, followed by orchidopexia in neonatal rats. Eighty-four, 10-day-postpartum (dpp) male rats (Wistar strain) were used and divided into 7 groups: healthy control, sham with α-Tocopherol treated with 30 or 100 mg/kg doses, sham vehicle, cryptorchidism treated with α-Tocopherol at 30 or 100 mg/kg doses and cryptorchidism vehicle. Cryptorchidism was surgically induced at 10 dpp. At 25 dpp the animals were treated with α-Tocopherol and the vitamin vehicle. Lipoperoxidation and testicular morphology was determined in half of the animals at 40 dpp (short term). The remaining animals underwent orchidopexia and fertility was determined at 90 dpp. Testicular morphology was determined at 120 dpp (long term) in these animals. A significant reduction of lipoperoxidation was observed in the cryptorchid group treated with α-Tocopherol compared to the untreated cryptorchid group, in addition to short-term histological alterations. At long term, we observed an increase in the area and maturation of the seminiferous epithelium, a decrease in apoptosis and histological alterations and an increase in fertility from α-Tocopherol treatment. α-Tocopherol treatment decreased lipoperoxidation, possibly stabilizing free radicals produced during cryptorchidism, reducing morphological testicular alterations and favoring fertility.
Collapse
|
21
|
Alves EPB, Alves AMP, Pereira RVF, de Miranda Neto MH, Zanoni JN. Immunohistochemical study of vasoactive intestinal peptide (VIP) enteric neurons in diabetic rats supplemented with L-glutamine. Nutr Neurosci 2010; 13:43-51. [PMID: 20132654 DOI: 10.1179/147683010x12611460763841] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The purpose of this work was to study the area of the varicosities of nerve fibers of myenteric neurons immunoreactive to vasoactive intestinal peptide (VIP-IR) and of the cell bodies of VIP-IR submucosal neurons of the jejunum of diabetic rats supplemented with 2% L-glutamine. Twenty male rats were divided into the following groups: normoglycemic (N), normoglycemic supplemented with L-glutamine (NG), diabetic (D) and diabetic supplemented with L-glutamine (DG). Whole-mounts of the muscle tunica and the submucosal layer were subjected to the immunohistochemical technique for neurotransmitter VIP identification. Morphometric analyses were carried out in 500 VIP-IR cell bodies of submucosal neurons and 2000 VIP-IR varicosities from each group. L-Glutamine supplementation to the normoglycemic animals caused an increase in the areas of the cell bodies (8.49%) and varicosities (21.3%) relative to the controls (P < 0.05). On the other hand, there was a decrease in the areas of the cell bodies (4.55%) and varicosities (28.9%) of group DG compared to those of group D (P < 0.05). It is concluded that L-glutamine supplementation was positive both to normoglycemic and diabetic animals.
Collapse
Affiliation(s)
- Eder Paulo Belato Alves
- Department of Morphophysiological Sciences, Laboratory of Enteric Neurons, State University of Maringa, Avenida Colombo, 5790 Bloco H-79, CEP 87020-900 Maringá, PR, Brazil.
| | | | | | | | | |
Collapse
|
22
|
Roldi LP, Pereira RVF, Tronchini EA, Rizo GV, Scoaris CR, Zanoni JN, Natali MRM. Vitamin E (alpha-tocopherol) supplementation in diabetic rats: effects on the proximal colon. BMC Gastroenterol 2009; 9:88. [PMID: 19930636 PMCID: PMC2788574 DOI: 10.1186/1471-230x-9-88] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Accepted: 11/23/2009] [Indexed: 12/17/2022] Open
Abstract
Background Neuropathy is one of the complications caused by diabetes mellitus which is directly related to the gastrointestinal manifestations of the disease. Antioxidant substances, such as vitamin E, may play an important role in the reduction of the neurological damage caused by diabetes mellitus. The aim of the present study was to determine whether vitamin E (α-tocopherol) at different concentrations induces any effects on the morphology of the intestinal wall and intrinsic innervation in the proximal colon of diabetic rats. Methods Thirty rats (90-day-old) were assigned to the following groups: N (normoglycemic), NE1 (normoglycemic supplemented with vitamin E 0.1%), NE2 (normoglycemic supplemented with vitamin E 2%), D (diabetic), DE1 (diabetic supplemented with vitamin E 0.1%), and DE2 (diabetic supplemented with vitamin E 2%). Animals received vitamin E supplementation for 120 days and were sacrificed when they were 210 days old. The proximal colon of each animal was subjected to histology to study the intestinal wall and goblet cells and processed for whole-mount preparations to morphoquantitatively determine the total myenteric population. Results Supplementation with vitamin E significantly reduced glycemia and glycated hemoglobin values and preserved the number of myenteric neurons in group DE2, without affecting intestinal area or thickness of the intestinal wall or muscular tunic. Conclusion Vitamin E (2%) influenced the glycemic parameters and had a neuroprotective effect on the total myenteric population, but the morphometric characteristics of the intestinal wall were unaffected.
Collapse
Affiliation(s)
- Luciana P Roldi
- Department of Morphophysiological Sciences, Laboratory of Enteric Neurons, State University of Maringá, Brazil.
| | | | | | | | | | | | | |
Collapse
|
23
|
Shirpoor A, Minassian S, Salami S, Khadem-Ansari MH, Ghaderi-Pakdel F, Yeghiazaryan M. Vitamin E protects developing rat hippocampus and cerebellum against ethanol-induced oxidative stress and apoptosis. Food Chem 2009. [DOI: 10.1016/j.foodchem.2008.07.034] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
24
|
Shireen K, Pace R, Mahboob M, Khan A. Effects of dietary vitamin E, C and soybean oil supplementation on antioxidant enzyme activities in liver and muscles of rats. Food Chem Toxicol 2008; 46:3290-4. [DOI: 10.1016/j.fct.2008.07.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2007] [Revised: 04/23/2008] [Accepted: 07/21/2008] [Indexed: 01/19/2023]
|
25
|
Protective effects of GH and IGF-I against iron-induced lipid peroxidation in vivo. ACTA ACUST UNITED AC 2008; 60:453-8. [DOI: 10.1016/j.etp.2008.04.012] [Citation(s) in RCA: 206] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Revised: 04/23/2008] [Accepted: 04/29/2008] [Indexed: 11/18/2022]
|