Yong Xu1, Ye Tian, Hui-Jie Wei, Jing-Fei Dong, Jian-Ning Zhang. 1. Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin Neurological Institute, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin 300052 PR China.
Abstract
BACKGROUND AND PURPOSE: The pathophysiology of cerebral aneurysms (CA) is linked to chronic inflammation. Endothelial damage is one of the first changes in CA walls resulted from inflammation. It has been shown that increase in plasma homocysteine (Hcy) impairs vascular endothelium and correlates with the development of atherosclerosis. However, the effect of hyperhomocysteinemia (HHcy) on the formation of cerebral aneurysm remains unknown. METHODS: Male Sprague-Dawley rats examined for developing cerebral aneurysms after surgical induction in the presence and absence of hypercysteinemia induced by a high L-methionine diet (1 g/kg/d). Aneurysms developed at the anterior cerebral-olfactory artery bifurcation were classified as 4 stages from no abnormality to saccular aneurysm. Plasma homocysteine levels and expression of vascular endothelial growth factor (VEGF), endothelial nitric oxide synthase (eNOS), inducible nitric oxide synthase (iNOS), matrix metalloproteinase-2 (MMP-2), and MMP-9 in aneurysmal walls was examined and correlated with CA formation 3 months after surgery. RESULTS: Methionine diet significantly increased plasma homocysteine levels, accelerates CA formation after ligation of the left common carotid artery. Expression of VEGF, iNOS, MMP-2, and MMP-9 in aneurysmal walls was also increased by methionine treatment. CONCLUSION: Hyperhomocysteinemia accelerates cerebral aneurysm formation, potentially through differential effects on expression of molecules critical for vascular wall modeling in a rat model.
BACKGROUND AND PURPOSE: The pathophysiology of cerebral aneurysms (CA) is linked to chronic inflammation. Endothelial damage is one of the first changes in CA walls resulted from inflammation. It has been shown that increase in plasma homocysteine (Hcy) impairs vascular endothelium and correlates with the development of atherosclerosis. However, the effect of hyperhomocysteinemia (HHcy) on the formation of cerebral aneurysm remains unknown. METHODS: Male Sprague-Dawley rats examined for developing cerebral aneurysms after surgical induction in the presence and absence of hypercysteinemia induced by a high L-methionine diet (1 g/kg/d). Aneurysms developed at the anterior cerebral-olfactory artery bifurcation were classified as 4 stages from no abnormality to saccular aneurysm. Plasma homocysteine levels and expression of vascular endothelial growth factor (VEGF), endothelial nitric oxide synthase (eNOS), inducible nitric oxide synthase (iNOS), matrix metalloproteinase-2 (MMP-2), and MMP-9 in aneurysmal walls was examined and correlated with CA formation 3 months after surgery. RESULTS:Methionine diet significantly increased plasma homocysteine levels, accelerates CA formation after ligation of the left common carotid artery. Expression of VEGF, iNOS, MMP-2, and MMP-9 in aneurysmal walls was also increased by methionine treatment. CONCLUSION:Hyperhomocysteinemia accelerates cerebral aneurysm formation, potentially through differential effects on expression of molecules critical for vascular wall modeling in a rat model.
Authors: Vincent M Tutino; Hamidreza Rajabzadeh-Oghaz; Sricharan S Veeturi; Kerry E Poppenberg; Muhammad Waqas; Max Mandelbaum; Nicholas Liaw; Adnan H Siddiqui; Hui Meng; John Kolega Journal: Neurosurg Rev Date: 2021-01-26 Impact factor: 2.800
Authors: Maria Kovalska; Eva Baranovicova; Dagmar Kalenska; Anna Tomascova; Marian Adamkov; Libusa Kovalska; Jan Lehotsky Journal: Int J Mol Sci Date: 2021-05-07 Impact factor: 5.923
Authors: Maria Kovalska; Petra Hnilicova; Dagmar Kalenska; Barbara Tothova; Marian Adamkov; Jan Lehotsky Journal: Int J Mol Sci Date: 2019-12-10 Impact factor: 5.923