Apoptosis inhibitor of macrophage as a biomarker for disease activity in Japanese children with IgA nephropathy and Henoch–Schönlein purpura nephritis

Background To evaluate the apoptosis inhibitor of macrophage (AIM) deposition patterns on the kidneys of children with IgA nephropathy (IgAN) and Henoch–Schönlein purpura nephritis (HSPN) and to investigate the clinical usefulness of serum and/or urinary AIM levels as biomarkers for the disease acti...

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Veröffentlicht in:Pediatric research 2021-02, Vol.89 (3), p.667-672
Hauptverfasser: Irabu, Hitoshi, Shimizu, Masaki, Kaneko, Shuya, Inoue, Natsumi, Mizuta, Mao, Tasaki, Yuko, Ohta, Kazuhide, Yachie, Akihiro, Wada, Taizo
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container_issue 3
container_start_page 667
container_title Pediatric research
container_volume 89
creator Irabu, Hitoshi
Shimizu, Masaki
Kaneko, Shuya
Inoue, Natsumi
Mizuta, Mao
Tasaki, Yuko
Ohta, Kazuhide
Yachie, Akihiro
Wada, Taizo
description Background To evaluate the apoptosis inhibitor of macrophage (AIM) deposition patterns on the kidneys of children with IgA nephropathy (IgAN) and Henoch–Schönlein purpura nephritis (HSPN) and to investigate the clinical usefulness of serum and/or urinary AIM levels as biomarkers for the disease activity. Methods Immunohistochemical study was performed in the kidneys of 37 patients with IgAN and 10 patients with HSPN. Serum and urinary AIM levels in the patients and 20 healthy controls (HCs) were quantified by enzyme-linked immunosorbent assay. The results were compared with clinical features. Results In patients with IgAN and HSPN, AIM expression was observed in various areas, including the glomerular mesangial and capillary areas, the proximal and distal tubular epithelial cells, and on infiltrating macrophages in the glomeruli and interstitial areas. Serum and urinary AIM levels were significantly elevated in these patients compared with the HCs. Urinary AIM levels were positively correlated with the histological severity and degree of proteinuria and hematuria as well as urinary β2 microglobulin and urinary N -acetyl-β-D-glucosaminidase levels. Conclusions AIM plays an important role in the pathogenesis of IgAN and HSPN. Urinary AIM levels can potentially reflect active renal inflammation in these diseases and may represent a useful biomarker for disease activity. Impact Urinary AIM levels may represent a useful biomarker for disease activity of IgAN and HSPN. AIM expression was observed in the glomeruli, tubular epithelial cells, and infiltrating macrophages in glomeruli and interstitial area. U-AIM/Cr were significantly correlated not only with proteinuria, hematuria, and u-β2MG and u-NAG levels but also with the activity index of histological findings in kidney biopsy specimens. Our results can emphasize the important role of AIM in the pathogenesis of IgAN and HSPN.
doi_str_mv 10.1038/s41390-020-0951-1
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Methods Immunohistochemical study was performed in the kidneys of 37 patients with IgAN and 10 patients with HSPN. Serum and urinary AIM levels in the patients and 20 healthy controls (HCs) were quantified by enzyme-linked immunosorbent assay. The results were compared with clinical features. Results In patients with IgAN and HSPN, AIM expression was observed in various areas, including the glomerular mesangial and capillary areas, the proximal and distal tubular epithelial cells, and on infiltrating macrophages in the glomeruli and interstitial areas. Serum and urinary AIM levels were significantly elevated in these patients compared with the HCs. Urinary AIM levels were positively correlated with the histological severity and degree of proteinuria and hematuria as well as urinary β2 microglobulin and urinary N -acetyl-β-D-glucosaminidase levels. Conclusions AIM plays an important role in the pathogenesis of IgAN and HSPN. Urinary AIM levels can potentially reflect active renal inflammation in these diseases and may represent a useful biomarker for disease activity. Impact Urinary AIM levels may represent a useful biomarker for disease activity of IgAN and HSPN. AIM expression was observed in the glomeruli, tubular epithelial cells, and infiltrating macrophages in glomeruli and interstitial area. U-AIM/Cr were significantly correlated not only with proteinuria, hematuria, and u-β2MG and u-NAG levels but also with the activity index of histological findings in kidney biopsy specimens. Our results can emphasize the important role of AIM in the pathogenesis of IgAN and HSPN.</description><identifier>ISSN: 0031-3998</identifier><identifier>EISSN: 1530-0447</identifier><identifier>DOI: 10.1038/s41390-020-0951-1</identifier><identifier>PMID: 32408340</identifier><language>eng</language><publisher>New York: Nature Publishing Group US</publisher><subject>Adolescent ; Apoptosis ; Apoptosis Regulatory Proteins - biosynthesis ; Biomarkers ; Biomarkers - metabolism ; Biopsy ; Case-Control Studies ; Child ; Child, Preschool ; Clinical Research Article ; Disease ; Female ; Glomerulonephritis, IGA - genetics ; Glomerulonephritis, IGA - metabolism ; Hematuria ; Humans ; IgA Vasculitis - genetics ; IgA Vasculitis - metabolism ; Immunohistochemistry ; Inflammation ; Japan ; Kidney - pathology ; Kidney Glomerulus - metabolism ; Kidneys ; Leukocyte Count ; Macrophages - metabolism ; Male ; Medicine ; Medicine &amp; Public Health ; Pathogenesis ; Pediatric Surgery ; Pediatrics ; Purpura ; Receptors, Scavenger - biosynthesis</subject><ispartof>Pediatric research, 2021-02, Vol.89 (3), p.667-672</ispartof><rights>International Pediatric Research Foundation, Inc 2020</rights><rights>International Pediatric Research Foundation, Inc 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c372t-559e249dcf95b6a578e91b2ba8d99811e32612952e2567ef608a9ed490e65d053</citedby><cites>FETCH-LOGICAL-c372t-559e249dcf95b6a578e91b2ba8d99811e32612952e2567ef608a9ed490e65d053</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/s41390-020-0951-1$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1038/s41390-020-0951-1$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32408340$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Irabu, Hitoshi</creatorcontrib><creatorcontrib>Shimizu, Masaki</creatorcontrib><creatorcontrib>Kaneko, Shuya</creatorcontrib><creatorcontrib>Inoue, Natsumi</creatorcontrib><creatorcontrib>Mizuta, Mao</creatorcontrib><creatorcontrib>Tasaki, Yuko</creatorcontrib><creatorcontrib>Ohta, Kazuhide</creatorcontrib><creatorcontrib>Yachie, Akihiro</creatorcontrib><creatorcontrib>Wada, Taizo</creatorcontrib><title>Apoptosis inhibitor of macrophage as a biomarker for disease activity in Japanese children with IgA nephropathy and Henoch–Schönlein purpura nephritis</title><title>Pediatric research</title><addtitle>Pediatr Res</addtitle><addtitle>Pediatr Res</addtitle><description>Background To evaluate the apoptosis inhibitor of macrophage (AIM) deposition patterns on the kidneys of children with IgA nephropathy (IgAN) and Henoch–Schönlein purpura nephritis (HSPN) and to investigate the clinical usefulness of serum and/or urinary AIM levels as biomarkers for the disease activity. Methods Immunohistochemical study was performed in the kidneys of 37 patients with IgAN and 10 patients with HSPN. Serum and urinary AIM levels in the patients and 20 healthy controls (HCs) were quantified by enzyme-linked immunosorbent assay. The results were compared with clinical features. Results In patients with IgAN and HSPN, AIM expression was observed in various areas, including the glomerular mesangial and capillary areas, the proximal and distal tubular epithelial cells, and on infiltrating macrophages in the glomeruli and interstitial areas. Serum and urinary AIM levels were significantly elevated in these patients compared with the HCs. Urinary AIM levels were positively correlated with the histological severity and degree of proteinuria and hematuria as well as urinary β2 microglobulin and urinary N -acetyl-β-D-glucosaminidase levels. Conclusions AIM plays an important role in the pathogenesis of IgAN and HSPN. Urinary AIM levels can potentially reflect active renal inflammation in these diseases and may represent a useful biomarker for disease activity. Impact Urinary AIM levels may represent a useful biomarker for disease activity of IgAN and HSPN. AIM expression was observed in the glomeruli, tubular epithelial cells, and infiltrating macrophages in glomeruli and interstitial area. U-AIM/Cr were significantly correlated not only with proteinuria, hematuria, and u-β2MG and u-NAG levels but also with the activity index of histological findings in kidney biopsy specimens. 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Methods Immunohistochemical study was performed in the kidneys of 37 patients with IgAN and 10 patients with HSPN. Serum and urinary AIM levels in the patients and 20 healthy controls (HCs) were quantified by enzyme-linked immunosorbent assay. The results were compared with clinical features. Results In patients with IgAN and HSPN, AIM expression was observed in various areas, including the glomerular mesangial and capillary areas, the proximal and distal tubular epithelial cells, and on infiltrating macrophages in the glomeruli and interstitial areas. Serum and urinary AIM levels were significantly elevated in these patients compared with the HCs. Urinary AIM levels were positively correlated with the histological severity and degree of proteinuria and hematuria as well as urinary β2 microglobulin and urinary N -acetyl-β-D-glucosaminidase levels. Conclusions AIM plays an important role in the pathogenesis of IgAN and HSPN. Urinary AIM levels can potentially reflect active renal inflammation in these diseases and may represent a useful biomarker for disease activity. Impact Urinary AIM levels may represent a useful biomarker for disease activity of IgAN and HSPN. AIM expression was observed in the glomeruli, tubular epithelial cells, and infiltrating macrophages in glomeruli and interstitial area. U-AIM/Cr were significantly correlated not only with proteinuria, hematuria, and u-β2MG and u-NAG levels but also with the activity index of histological findings in kidney biopsy specimens. Our results can emphasize the important role of AIM in the pathogenesis of IgAN and HSPN.</abstract><cop>New York</cop><pub>Nature Publishing Group US</pub><pmid>32408340</pmid><doi>10.1038/s41390-020-0951-1</doi><tpages>6</tpages></addata></record>
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subjects Adolescent
Apoptosis
Apoptosis Regulatory Proteins - biosynthesis
Biomarkers
Biomarkers - metabolism
Biopsy
Case-Control Studies
Child
Child, Preschool
Clinical Research Article
Disease
Female
Glomerulonephritis, IGA - genetics
Glomerulonephritis, IGA - metabolism
Hematuria
Humans
IgA Vasculitis - genetics
IgA Vasculitis - metabolism
Immunohistochemistry
Inflammation
Japan
Kidney - pathology
Kidney Glomerulus - metabolism
Kidneys
Leukocyte Count
Macrophages - metabolism
Male
Medicine
Medicine & Public Health
Pathogenesis
Pediatric Surgery
Pediatrics
Purpura
Receptors, Scavenger - biosynthesis
title Apoptosis inhibitor of macrophage as a biomarker for disease activity in Japanese children with IgA nephropathy and Henoch–Schönlein purpura nephritis
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