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Arif Z, Tarannum A, Arfat MY, Arif B, Shahab S, Arif M, Nelofar K, Badar A, Islam SN, Zaman A, Ahmad S, Iqubal MA, Gupta A, Aggarwal A, Alam K. Impact of endogenous stress on albumin structure in systemic lupus erythematosus (SLE) patients. Int J Biol Macromol 2020; 151:891-900. [PMID: 32014478 DOI: 10.1016/j.ijbiomac.2020.01.295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 01/25/2020] [Accepted: 01/30/2020] [Indexed: 10/25/2022]
Abstract
Systemic lupus erythematosus (SLE) is an inflammatory, autoimmune disorder of unknown etiology. The inflammatory stress in SLE patients may modify macromolecules and produce structural/functional abnormalities. The present study is aimed at examining the consequences of stresses on the structure of albumin in SLE patients. Albumin was isolated from the sera of SLE/healthy subjects. Multiple physicochemical techniques were used to elucidate, structure of albumin. Advanced glycation end products in SLE patients' albumin were identified by the AGE specific fluorescence. Quenching of tryptophan, tyrosine fluorescence and surface protein hydrophobicity was observed in SLE patients' albumin. Protein-bound carbonyls were elevated while free thiol, lysine, arginine, and alpha helicity was found to be decreased in SLE albumin. Furthermore, changes in the secondary structure of SLE albumin were observed as shift in the position of amide I/II bands. Functionality of SLE albumin was also compromised as its cobalt-binding ability was substantially declined. Adduction of moieties was detected by dynamic light scattering (DLS) and confirmed by matrix assisted laser desorption/ionization. DLS, thioflavin T and transmission electron microscopy results confirmed aggregates in SLE patients' albumin. This study may be helpful in understanding the role of modified albumin in the cofounding pathologies associated with SLE.
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Affiliation(s)
- Zarina Arif
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India.
| | - Akhlas Tarannum
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Mir Yasir Arfat
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Binish Arif
- Department of Clinical Biochemistry, Sher-I-Kashmir Institute of Medical Sciences, Srinagar, Jammu & Kashmir, India
| | - Sana Shahab
- Department of Business and Administration, College of Business and Administration, Princess Norah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Maryam Arif
- Department of Biochemistry, Faculty of Life Science, Aligarh Muslim University, Aligarh 202002, India
| | - Km Nelofar
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Asim Badar
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Shireen Naaz Islam
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Asif Zaman
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Shafeeque Ahmad
- Department of Biochemistry, Al-Falah School of Medical Science and Research Centre, Al-Falah University, Dhauj, Faridabad 121004, Haryana, India
| | - Mohammad Arif Iqubal
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Akankcha Gupta
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Amita Aggarwal
- Department of Clinical Immunology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow 226014, India
| | - Khursheed Alam
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh 202002, India
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Abdulahad DA, Westra J, Bijzet J, Limburg PC, Kallenberg CGM, Bijl M. High mobility group box 1 (HMGB1) and anti-HMGB1 antibodies and their relation to disease characteristics in systemic lupus erythematosus. Arthritis Res Ther 2011; 13:R71. [PMID: 21548924 PMCID: PMC3218880 DOI: 10.1186/ar3332] [Citation(s) in RCA: 121] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 03/28/2011] [Accepted: 05/06/2011] [Indexed: 01/01/2023] Open
Abstract
Introduction High Mobility Group Box 1 (HMGB1) is a nuclear non-histone protein. HMGB1, which is secreted by inflammatory cells and passively released from apoptotic and necrotic cells, may act as a pro-inflammatory mediator. As apoptotic cells accumulate in systemic lupus erythematosus (SLE), HMGB1 levels might be increased in SLE. HMGB1 may also serve as an autoantigen, leading to the production of anti-HMGB1 antibodies. In this study we determined levels of HMGB1 and anti-HMGB1 in SLE patients in comparison to healthy controls (HC) and analysed their relation with disease activity. Methods The study population consisted of 70 SLE patients and 35 age- and sex-matched HC. Thirty-three SLE patients had quiescent disease, the other 37 patients were selected for having active disease. Nineteen of these had lupus nephritis. HMGB1 levels were measured with both Western blot and ELISA. Anti-HMGB1 levels were measured by ELISA. Clinical and serological parameters were assessed according to routine procedures. Results HMGB1 levels in SLE patients could be measured reliably by Western blotting only, and were significantly increased compared to HC. During active disease HMGB1 levels increased, in particular in patients with renal involvement. Serum HMGB1 levels correlated with SLEDAI, proteinuria, and anti-dsDNA levels, and showed a negative correlation with complement C3. Anti-HMGB1 levels were significantly increased in SLE patients compared to HC, and positively correlated with HMGB1 levels. Conclusions Levels of HMGB1 in the sera of SLE patients, in particular in those with active renal disease, are increased. Serum HMGB1 levels are related to SLEDAI scores and proteinuria, as well as to levels of anti-HMGB1 antibodies. These findings suggest that besides HMGB1, HMGB1-anti-HMGB1 immune complexes play a role in the pathogenesis of SLE, in particular in patients with renal involvement.
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Affiliation(s)
- Deena A Abdulahad
- Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, University of Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands.
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Gupta A, Jothy S, Somerville P, Zaltzman JS. Hypocomplementaemic immune complex tubulointerstitial nephritis. NDT Plus 2009; 3:78-80. [PMID: 25949412 PMCID: PMC4421536 DOI: 10.1093/ndtplus/sfp141] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Accepted: 09/07/2009] [Indexed: 11/15/2022] Open
Abstract
We report a rare cause of rapidly progressive renal failure associated with low complement, positive ANA but negative anti DS-DNA. A renal biopsy demonstrated tubulointerstitial nephritis with positive immunoglobulin staining involving the interstitium and tubular basement membrane but glomerular sparing. A review of the literature and differential diagnosis are discussed.
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Affiliation(s)
| | - Serge Jothy
- Department of Laboratory Medicine and Pathobiology, St. Michael's Hospital, Toronto , Canada
| | - Peter Somerville
- Department of Nephrology, Grand River Hospital, Kitchner-Waterloo , Canada
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Vaseemuddin M, Schwartz MM, Dunea G, Kraus MA. Idiopathic hypocomplementemic immune-complex-mediated tubulointerstitial nephritis. ACTA ACUST UNITED AC 2007; 3:50-8. [PMID: 17183262 DOI: 10.1038/ncpneph0347] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Accepted: 09/15/2006] [Indexed: 11/09/2022]
Abstract
BACKGROUND A 42-year-old man presenting with flank pain was found to have renal failure with severe hypocomplementemia and eosinophilia. INVESTIGATIONS Physical examination, laboratory testing, renal ultrasonography, and renal biopsies. DIAGNOSIS Acute immune-complex-mediated tubulointerstitial nephritis. MANAGEMENT Immunosuppressive therapy with 1 mg/kg/day prednisone.
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Yukawa N, Tsuboi N, Yukawa S, Hayashi H, Arai T, Abe H, Tahara K, Takanashi H, Hayashi T. Marked hypocomplementemia and tubulointerstitial nephritis in a male patient with Sjögren’s syndrome. Mod Rheumatol 2004. [DOI: 10.3109/s10165-004-0285-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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