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Bin-Jaliah I, Hewett PW, Al-Hashem F, Haidara MA, Abdel Kader DH, Morsy MD, Al-Ani B. Insulin protects against type 1 diabetes mellitus-induced aortopathy associated with the inhibition of biomarkers of vascular injury in rats. Arch Physiol Biochem 2021; 127:266-272. [PMID: 31250674 DOI: 10.1080/13813455.2019.1632900] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND We sought to investigate the protective effect of insulin against type 1 diabetes mellitus (T1DM)-induced aortic injury (aortopathy) associated with the inhibition of biomarkers of vascular injury. MATERIAL AND METHODS T1DM was induced in rats by streptozotocin (STZ) (65 mg/kg), and the protection group started insulin treatment 2 days post diabetic induction and continued until being sacrificed at week 8. RESULTS Aortopathy was developed in the diabetic rats as demonstrated by profound alterations to the aorta ultrastructure, which was substantially protected by insulin. In addition, insulin significantly inhibited diabetes-induced dyslipidaemia, soluble vascular cell adhesion molecule-1 (sVCAM-1) and soluble intercellular adhesion molecule-1 (sICAM-1), oxidative stress, and inflammation. However, blood levels of these biomarkers in the insulin-treated group were still significant (p < .05) compared with the control group, whereas insulin treatment returned blood glucose and triglyceride to control levels. CONCLUSIONS We demonstrate effective protection by insulin against T1DM-induced aortopathy in rats, which is associated with the inhibition of vascular injury biomarkers.
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Affiliation(s)
- Ismaeel Bin-Jaliah
- Department of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Peter W Hewett
- Institute of Cardiovascular Sciences, College of Medicine and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Fahaid Al-Hashem
- Department of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Mohamed A Haidara
- Department of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
- Department of Physiology, Kasr al-Aini Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Dina H Abdel Kader
- Department of Medical Histology, Kasr al-Aini Faculty of Medicine, Cairo University, Cairo, Egypt
| | - M D Morsy
- Department of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
- Department of Physiology, College of Medicine, Menoufia University, Shibin el Kom, Egypt
| | - Bahjat Al-Ani
- Department of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
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Alzamil NM, Dawood AF, Hewett PW, Bin-Jaliah I, Assiri AS, Abdel Kader DH, Eid RA, Haidara MA, Al-Ani B. Suppression of type 2 diabetes mellitus-induced aortic ultrastructural alterations in rats by insulin: an association of vascular injury biomarkers. Ultrastruct Pathol 2020; 44:316-323. [PMID: 32536288 DOI: 10.1080/01913123.2020.1780362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Diabetes represents a major public health problem and an estimated 70% of people with diabetes die of cardiovascular complications. The protective effect of insulin treatment against ultrastructural damage to the tunica intima and tunica media of the aorta induced by type 2 diabetes mellitus (T2DM) has not been investigated before using transmission electron microscopy (TEM). Therefore, we induced T2DM in rats using high fat diet and streptozotocin (50 mg/kg) and administered insulin daily by i.v injection for 8 weeks to the treatment group. Whereas, the T2DM control group were left untreated for the duration of the experiment. A comparison was also made between the effect of insulin on aortic tissue and the blood level of biomarkers of vascular injury, inflammation, and oxidative stress. T2DM induced profound ultrastructural damage to the aortic endothelium and vascular smooth muscle cells, which were substantially protected with insulin. Furthermore, insulin returned blood sugar to a control level and significantly (p < .05) inhibited diabetic up-regulation of endothelial and leukocyte intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion protein 1 (VCAM-1), endothelial cell adhesion molecules, P-selectin and E-selectin, tumor necrosis factor-alpha (TNF-α), C-reactive protein (CRP), and malondialdehyde (MDA). Furthermore, insulin augmented the blood level of the anti-oxidant enzyme superoxide dismutase (SOD). We conclude that in a rat model of T2DM, insulin treatment substantially reduces aortic injury secondary to T2DM for a period of 8 weeks, possibly due to the inhibition of hyperglycemia, vascular activation, inflammation, and oxidative stress.
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Affiliation(s)
- Norah M Alzamil
- Department of Clinical Science, Family Medicine, College of Medicine, Princess Nourah Bint Abdulrahman University , Riyadh, Saudi Arabia
| | - Amal F Dawood
- Department of Basic Medical Sciences, College of Medicine, Princess Nourah Bint Abdulrahman University , Riyadh, Saudi Arabia.,Department of Physiology, Kasr al-Aini Faculty of Medicine, Cairo University , Cairo, Egypt
| | - Peter W Hewett
- Institute of Cardiovascular Sciences, College of Medicine and Dental Sciences, University of Birmingham , Birmingham, UK
| | - Ismaeel Bin-Jaliah
- Department of Physiology, College of Medicine, King Khalid University , Abha, Saudi Arabia
| | - Abdullah S Assiri
- Department of Medicine, College of Medicine, King Khalid University , Abha, Saudi Arabia
| | - Dina H Abdel Kader
- Department of Medical Histology, Kasr al-Aini Faculty of Medicine, Cairo University , Cairo, Egypt
| | - Refaat A Eid
- Department of Pathology, College of Medicine, King Khalid University , Abha, Saudi Arabia
| | - Mohamed A Haidara
- Department of Physiology, Kasr al-Aini Faculty of Medicine, Cairo University , Cairo, Egypt.,Department of Physiology, College of Medicine, King Khalid University , Abha, Saudi Arabia
| | - Bahjat Al-Ani
- Department of Physiology, College of Medicine, King Khalid University , Abha, Saudi Arabia
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Dallak M, Haidara MA, Bin-Jaliah I, Eid RA, Amin SN, Abdel Latif NS, Al-Ani B. Metformin suppresses aortic ultrastrucural damage and hypertension induced by diabetes: a potential role of advanced glycation end products. Ultrastruct Pathol 2019; 43:190-198. [PMID: 31522593 DOI: 10.1080/01913123.2019.1666952] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cardiovascular disease secondary to diabetes represents a significant challenge to the health community. The advanced glycation end products (AGEs) play an important role in diabetes-mediated vascular injury. We tested whether metformin can suppress aortic AGEs production and protect against aortic injuries (aortopathy) and hypertension in streptozotocin-induced type 2 diabetes mellitus (T2DM) animal model. T2DM was induced in rats two weeks after being fed on a high carbohydrate and fat diet (HCFD), and continued on a HCFD until being sacrificed at week 12 (model group). The protective group was put on metformin two weeks before diabetic induction and continued on metformin and HCFD until the end of the experiment, at week 12. Using electron microscopy examinations, we observed in the model group substantial damage to the ultrastructure of aortic endothelial and vascular smooth muscle layers as demonstrated by markedly distorted vacuolated endothelial and vascular smooth muscle cells with pyknotic nuclei detached from the underlying basement membrane, which were protected by metformin. Also, metformin significantly (p < .05) decreased both systolic and diastolic blood pressure, aortic levels of AGEs, and blood levels of oxidative stress and inflammatory biomarkers. We conclude that metformin protects against T2DM-induced aortopathy and hypertension, possibly via the inhibition of AGEs, inflammation, and oxidative stress.
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Affiliation(s)
- Mohammad Dallak
- Departments of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Mohamed A Haidara
- Departments of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia.,Physiology, Kasr Al-Aini Faculty of Medicine, Cairo University, Giza, Egypt
| | - Ismaeel Bin-Jaliah
- Departments of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Refaat A Eid
- Pathology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Shaimaa N Amin
- Physiology, Kasr Al-Aini Faculty of Medicine, Cairo University, Giza, Egypt
| | - Noha S Abdel Latif
- Medical Pharmacology, Kasr Al-Aini Faculty of Medicine, Cairo University, Giza, Egypt
| | - Bahjat Al-Ani
- Departments of Physiology, College of Medicine, King Khalid University, Abha, Saudi Arabia
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