Molecular factors of angiogenesis in renal tissue of patients with chronic glomerulonephritis: association with nephrosclerosis and anemia
- Authors: Shvetsov M.Y.1, Ivanov A.A.1, Kuznetsova A.V.1, Popova O.P.1, Rameeva A.S.1, Shvetsov MY.1, Ivanov AA1, Kuznetsova AV1, Popova OP1, Rameeva AS1
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Affiliations:
- Московская медицинская академия им. И. М. Сеченова
- Issue: Vol 81, No 8 (2009)
- Pages: 14-19
- Section: Editorial
- URL: https://journals.rcsi.science/0040-3660/article/view/30465
- ID: 30465
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Full Text
Abstract
Material and methods. We examined 22 patients with marked proteinuria (2.7; 5.7, mean 4.2 g/day). Half of the patients had nephrotic syndrome. Glomerular filtration rate (GFR) by Cochroft-Golt formula was 68 (53;84) ml/min/1.73 m2. According to renal biopsy findings, CGN was detected in 19 patients, 2 patients had lupus nephritis (LN), 1 patient had renal amyloidosis. Nineteen CGN patients were divided into two groups by nephrosclerosis severity: group 1-7 patients with moderate nephrosclerosis, group 2-12 patients with severe nephrosclerosis. Cryostate sections of renal biopsy tissue samples were studied immunohistochemically using monoclonal antibodies to HIF-1α, VEGF, TSP-1, CD34. The reaction intensity was assessed by 6-point scale semuquantitative method.
Results. Response to HIF-1a was stronger in the tubular epithelium than in glomeruli. No correlation was observed between accumulation of HIF-1a in the glomeruli and tubular epithelium. Intensity of glomerular staining correlated with severity of proteinuria (Rs = 0.63, p < 0.05), intensity of HIF-1α accumulation in tubular epithelium correlated with duration of the kidney disease (Rs = 0.74, p < 0.001), duration of persistent arterial hypertension (Rs = 0.68, p < 0.05) and severity of nephrosclerosis. VEGF and TSP-1 were found in equal quantity both in the glomeruli and renal interstitium. CGN patients with marked nephrosclerosis had lower accumulation of VEGF and higher TSP-1 in the interstitium. No correlation was found between intensity of tubular epithelium response to HIF-1α and accumulation of VEGF in the interstitium. Patients with severe nephrosclerosis demonstrated weaker staining of tubulointerstitium to CD34, reflecting the degree of its vascularisation. Significant correlation between CD34 and expression of HIF-1α, VEGF, TSP-1 was not registered. In patients with low intensity of tubular epithelial staining to HIF-1α (less than 2 points) anemia was detected in 63% versus 18% in patients with more intensive accumulation.
Conclusion. CGN progression is associated with development of renal tubulointerstitial ischemia. High tubular production of HIF-1α was not accompanied with activation of VEGF accumulation in renal interstitium but was associated with reduced risk of anemia in CGN patients with manifest nephrosclerosis.
About the authors
Mikhail Yur'evich Shvetsov
Московская медицинская академия им. И. М. Сеченовак. м. н., в. н. с., отдел нефрологии; Московская медицинская академия им. И. М. Сеченова
Aleksey Alekseevich Ivanov
Московская медицинская академия им. И. М. Сеченова
Email: aaivanov@mmascience.ru
д. м. н., проф., НИИ молекулярной медицины; Московская медицинская академия им. И. М. Сеченова
Alla Viktorovna Kuznetsova
Московская медицинская академия им. И. М. Сеченова
Email: avkuzn@list.ru
к. м. н., н. с., отдел клеточной и молекулярной патологии НИИ молекулярной медицины; Московская медицинская академия им. И. М. Сеченова
Ol'ga Petrovna Popova
Московская медицинская академия им. И. М. Сеченова
Email: gladskih@mmascience.ru
к. б. н., директор, Центр клеточных технологий; Московская медицинская академия им. И. М. Сеченова
Anna Sergeevna Rameeva
Московская медицинская академия им. И. М. Сеченоваклинический ординатор, кафедра терапии и профессиональных болезней медико-профилактического факультета; Московская медицинская академия им. И. М. Сеченова
M Yu Shvetsov
A A Ivanov
A V Kuznetsova
O P Popova
A S Rameeva
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