1
|
Collares-Buzato CB, da Cruz-Höfling MA. Disarray of glomerular and tubular cell adhesion molecules in the course of experimental Bothrops moojeni envenomation. Toxicon 2013; 78:41-6. [PMID: 24291462 DOI: 10.1016/j.toxicon.2013.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/11/2013] [Accepted: 11/20/2013] [Indexed: 10/26/2022]
Abstract
In this study, we show that administration of Bothrops moojeni venom in rats induces a general disturbance in the distribution and content of the tight junctional protein ZO-1, the cell-matrix receptor beta 1 integrin, the cytoskeletal proteins, vinculin and F-actin, and of the extracellular matrix component laminin in renal corpuscles and cortical nephron tubules. These findings suggest that cell-cell and cell-matrix adhesion proteins may be molecular targets in the B. moojeni-induced kidney injury.
Collapse
Affiliation(s)
- Carla Beatriz Collares-Buzato
- Department of Histology and Embryology, Institute of Biology, P.O. Box 6109, State University of Campinas (UNICAMP), 13 087-130 Campinas, SP, Brazil
| | - Maria Alice da Cruz-Höfling
- Department of Histology and Embryology, Institute of Biology, P.O. Box 6109, State University of Campinas (UNICAMP), 13 087-130 Campinas, SP, Brazil.
| |
Collapse
|
2
|
Borza CM, Su Y, Chen X, Yu L, Mont S, Chetyrkin S, Voziyan P, Hudson BG, Billings PC, Jo H, Bennett JS, Degrado WF, Eckes B, Zent R, Pozzi A. Inhibition of integrin α2β1 ameliorates glomerular injury. J Am Soc Nephrol 2012; 23:1027-38. [PMID: 22440900 DOI: 10.1681/asn.2011040367] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Mesangial cells and podocytes express integrins α1β1 and α2β1, which are the two major collagen receptors that regulate multiple cellular functions, including extracellular matrix homeostasis. Integrin α1β1 protects from glomerular injury by negatively regulating collagen production, but the role of integrin α2β1 in renal injury is unclear. Here, we subjected wild-type and integrin α2-null mice to injury with adriamycin or partial renal ablation. In both of these models, integrin α2-null mice developed significantly less proteinuria and glomerulosclerosis. In addition, selective pharmacological inhibition of integrin α2β1 significantly reduced adriamycin-induced proteinuria, glomerular injury, and collagen deposition in wild-type mice. This inhibitor significantly reduced collagen synthesis in wild-type, but not integrin α2-null, mesangial cells in vitro, demonstrating that its effects are integrin α2β1-dependent. Taken together, these results indicate that integrin α2β1 contributes to glomerular injury by positively regulating collagen synthesis and suggest that its inhibition may be a promising strategy to reduce glomerular injury and proteinuria.
Collapse
Affiliation(s)
- Corina M Borza
- Departments of Medicine and Cancer Biology, Division of Nephrology and Hypertension, Vanderbilt University, Medical Center North, Nashville, TN 37232, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Bertinetto FE, Calafell F, Roggero S, Chidichimo R, Garino E, Marcuccio C, Coppo R, Scolari F, Frascá GM, Savoldi S, Schena FP, Amoroso A. Search for genetic association between IgA nephropathy and candidate genes selected by function or by gene mapping at loci IGAN2 and IGAN3. Nephrol Dial Transplant 2011; 27:2328-37. [PMID: 22131235 DOI: 10.1093/ndt/gfr633] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND IgA nephropathy (IgAN) is not generally considered a hereditary disease, even though extensive evidence suggests an undefined genetic influence. Linkage analysis identified a number of genome regions that could contain variations linked to IgAN. METHODS In this case-control association study, genes possibly involved in the development of IgAN were investigated. DNA samples from 460 North Italian patients with IgAN and 444 controls were collected. Candidate genes were selected based on their possible functional involvement (6 genes) or because of their location within linkage-identified genomic regions IGAN2 and IGAN3 (5 and 13 genes within chromosome 4q26-31 and 17q12-22, respectively). One hundred and ninety-two tag and functional single-nucleotide polymorphisms (SNPs) were typed with Veracode GoldenGate technology (Illumina). RESULTS C1GALT1 showed an association with IgAN (rs1008898: P = 0.0019 and rs7790522: P = 0.0049). Associations were found when the population was stratified by gender (C1GALT1, CD300LG, GRN, ITGA2B, ITGB3 in males and C1GALT1, TRPC3, B4GALNT2 in females) and by age (TLR4, ITGB3 in patients aged <27 years). Furthermore, rs7873784 in TLR4 showed an association with proteinuria (G allele: P = 0.0091; GG genotype: P = 0.0077). CONCLUSIONS Age and gender are likely to evidence distinct immunological and inflammatory reactions leading to individual susceptibility to IgAN. Overall, a genetic predisposition to sporadic IgAN was found. We might hypothesize that C1GALT1 and TLR4 polymorphisms influence the risk to develop IgAN and proteinuria, respectively.
Collapse
|
4
|
Coppo R, Feehally J. Is progression of IgA nephropathy conditioned by genes regulating atherosclerotic damage? Nephrol Dial Transplant 2009; 24:3573-5. [DOI: 10.1093/ndt/gfp524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
5
|
Stangou M, Alexopoulos E, Pantzaki A, Leonstini M, Memmos D. C5b-9 glomerular deposition and tubular α3β1-integrin expression are implicated in the development of chronic lesions and predict renal function outcome in immunoglobulin A nephropathy. ACTA ACUST UNITED AC 2009; 42:373-80. [DOI: 10.1080/00365590801943241] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Maria Stangou
- Nephrology Department, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | | | - Maria Leonstini
- Pathology Department, Hippokration Hospital, Thessaloniki, Greece
| | - Dimitrios Memmos
- Nephrology Department, Aristotle University of Thessaloniki, Thessaloniki, Greece
| |
Collapse
|
6
|
Yamamoto R, Nagasawa Y, Shoji T, Inoue K, Uehata T, Kaneko T, Okada T, Yamauchi A, Tsubakihara Y, Imai E, Isaka Y, Rakugi H. A candidate gene approach to genetic prognostic factors of IgA nephropathy--a result of Polymorphism REsearch to DIstinguish genetic factors Contributing To progression of IgA Nephropathy (PREDICT-IgAN). Nephrol Dial Transplant 2009; 24:3686-94. [PMID: 19420105 DOI: 10.1093/ndt/gfp210] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Renal prognosis of IgA nephropathy (IgAN) is affected by environmental and genetic factors. Other studies demonstrated that some atherosclerotic disease-related genes were significantly associated with renal prognosis. METHODS The Polymorphism REsearch to DIstinguish genetic factors Contributing To progression of IgAN (PREDICT-IgAN) was a multicentre retrospective observational study to investigate associations between progression of IgAN (a 50% increase of serum creatinine level and slope of eGFR) and a hundred atherosclerotic disease-related gene polymorphisms, mainly single nucleotide polymorphisms (SNPs) in 320 IgAN patients who had more than a normal range of urinary protein (> or =0.25 g/day) at diagnosis. RESULTS During 8.3 +/- 4.2 years of a follow-up period, 83 patients (25.9%) developed progression. In log-rank tests, glycoprotein Ia GPIa C807T and G873A and intercellular adhesion molecule-1 ICAM-1 A1548G (K469E) were found to be significantly associated with progression even after adjustment for multiple comparisons by the method of Bonferroni (adjusted P = 0.0174, 0.0176 and 0.0430, respectively). In a multivariate Cox proportional-hazards model, GPIa 807TT (873CC) [versus 807TT, adjusted hazard ratio 2.05 (95% confidence interval 1.13-3.71)] and ICAM-1 1548GG [versus 1548AA, 2.55 (1.40-4.65)] were identified as independent genetic predictors of progression, along with conventional clinical prognostic factors such as eGFR, urinary protein and use of antihypertensives at diagnosis. CONCLUSIONS PREDICT-IgAN distinguished GPIa C807T/ G873A and ICAM-1 A1548G from multiple athero- sclerotic disease-related gene polymorphisms by their predictive indicator for progression of IgAN.
Collapse
Affiliation(s)
- Ryohei Yamamoto
- Department of Geriatric Medicine and Nephrology, Osaka University Graduate School of Medicine, Osaka, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
White LR, Blanchette JB, Ren L, Awn A, Trpkov K, Muruve DA. The characterization of alpha5-integrin expression on tubular epithelium during renal injury. Am J Physiol Renal Physiol 2006; 292:F567-76. [PMID: 17018844 DOI: 10.1152/ajprenal.00212.2006] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The hallmark of progressive chronic kidney disease is the deposition of extracellular matrix proteins and tubulointerstitial fibrosis. Integrins mediate cell-extracellular matrix interaction and may play a role tubular epithelial injury. Murine primary tubular epithelial cells (TECs) express alpha(5)-integrin, a fibroblast marker and the natural receptor for fibronectin. Microscopy localized alpha(5)-integrin on E-cadherin-positive cells, confirming epithelial expression. The expression of alpha(5)-integrin increased in TECs grown on fibronectin and occurred in parallel with an upregulation of alpha-smooth muscle actin (alphaSMA), a marker of epithelial-mesenchymal transition (EMT). Exposure of TECs to transforming growth factor (TGF)-beta also increased TEC alpha(5)-integrin expression in association with alphaSMA and EMT. Knock-down of alpha5-integrin expression with short interfering RNA attenuated the TGF-beta induction of alphaSMA but did not alter morphologic EMT. Rather, alpha5-integrin was necessary for epithelial cell migration on fibronectin but not type IV collagen during cell spreading and epithelial wound healing in vitro. Immunohistochemistry revealed basolateral tubular epithelial alpha(5)-integrin expression in mouse kidneys after unilateral ureteric obstruction but not in contralateral control kidneys. In patient biopsies of nondiabetic kidney disease, alpha(5)-integrin expression was increased significantly in the renal interstitium. Focal basolateral staining was also detected in injured, but not in normal, tubular epithelium. In summary, these data show that TECs are induced to express alpha(5)-integrin during EMT and tubular epithelial injury in vitro and in vivo. These results increase our understanding of the biology of integrins during EMT and tubular injury in chronic kidney disease.
Collapse
|
8
|
Trevillian P, Paul H, Millar E, Hibberd A, Agrez MV. alpha(v)beta(6) Integrin expression in diseased and transplanted kidneys. Kidney Int 2005; 66:1423-33. [PMID: 15458435 DOI: 10.1111/j.1523-1755.2004.00904.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Integrins have been implicated in the pathogenesis of a diverse range of kidney diseases. Herein, we provide the first detailed description of an epithelial restricted integrin, alpha(v)beta(6), in kidney biopsies from patients suffering acute and chronic renal diseases and after transplantation. METHODS Immunoperoxidase staining for beta(6) was performed on 267 selected biopsy specimens from native (N= 126) and transplanted kidneys (N= 141) and scored semiquantitatively. The site of beta(6) expression in tubules was determined using haematoxylin counterstaining and by colocalization with Tamm-Horsfall protein. Comparisons were made between subcategories of diseases of native kidneys and between "service" and "protocol" biopsies of transplanted kidneys. RESULTS beta(6), when present, is largely confined to the distal tubules and collecting ducts, colocated with Tamm-Horsfall protein. When sparsely present, it was often restricted to the tubular segment associated with the juxtaglomerular apparatus. It was found in tubular cells shed into the urine. beta(6) was not expressed in thin membrane nephropathy, or in nonproliferative forms of glomerulonephritis, with the exception of focal and segmental glomerulosclerosis (FSGS). It was diffusely expressed where there was glomerular necrosis or thrombosis and in most forms of acute or chronic tubulointerstitial disease. beta(6) was diffusely up-regulated in allografts biopsied for delayed function, in almost all kidneys that have clinical or subclinical rejection episodes and was prominent in chronic allograft nephropathy. CONCLUSION beta(6) integrin is not normally expressed in adult native or transplanted kidneys but is commonly up-regulated in the distal tubule in disease. Our descriptive study suggests that it is a molecule worthy of further study.
Collapse
Affiliation(s)
- Paul Trevillian
- Newcastle Transplant Unit, John Hunter Hospital, Newcastle, New South Wales, Australia.
| | | | | | | | | |
Collapse
|
9
|
Yung S, Woods A, Chan TM, Davies M, Williams JD, Couchman JR. Syndecan-4 up-regulation in proliferative renal disease is related to microfilament organization. FASEB J 2001; 15:1631-3. [PMID: 11427509 DOI: 10.1096/fj.00-0794fje] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- S Yung
- Institute of Nephrology, University of Wales College of Medicine, Cardiff, Wales, UK
| | | | | | | | | | | |
Collapse
|
10
|
Peruzzi L, Amore A, Cirina P, Trusolino L, Basso G, Ricotti E, Emancipator SN, Marchisio PC, Coppo R. Integrin expression and IgA nephropathy: in vitro modulation by IgA with altered glycosylation and macromolecular IgA. Kidney Int 2000; 58:2331-40. [PMID: 11115067 DOI: 10.1046/j.1523-1755.2000.00417.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Signal transduction by mesangial cell (MC) integrins regulates cell growth and survival, extracellular matrix production, and organization. The aim of the study was to investigate human MC integrin modulation by differently glycosylated IgA and macromolecular IgA, which are thought to play a pathogenetic role in IgA nephropathy (IgAN). METHODS MCs were incubated with purified human polymeric IgA, heat-aggregated IgA, IgA glycoforms generated by enzymatic hydrolysis of saccharide residues and serum fractions from IgAN patients, and controls isolated by lectin affinity and containing IgA with peculiar glycan patterns. Integrins were quantitated by flow cytometry. RESULTS Cultured MCs highly expressed alphavbeta3 and some alpha3beta1; alphavbeta3 was up-regulated by matrix components (P < 0.02). In vitro desialylated and degalactosylated polymeric human IgA enhanced alphavbeta3 expression on cultured MCs (P < 0.001). Serum IgA glycoforms isolated from IgAN patients with high exposure of internal sugars, GalNAc, Neu5Ac2,6GalNAc, and Man enhanced alphav expression on cultured MCs more than healthy controls. CONCLUSIONS.: These data support the hypothesis that IgA glycation plays a role in modulating the cell-matrix interaction, and that this mechanism can be operating in IgAN.
Collapse
Affiliation(s)
- L Peruzzi
- Nephrology and Dialysis Department, Regina Margherita Children's Hospital, Torino, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|