PMID- 21393878 OWN - NLM STAT- MEDLINE DCOM- 20110620 LR - 20110311 IS - 0974-5130 (Electronic) IS - 0377-4929 (Linking) VI - 54 IP - 1 DP - 2011 Jan-Mar TI - Light chain immunofluorescence in various nephropathies. PG - 55-8 LID - 10.4103/0377-4929.77325 [doi] AB - CONTEXT: Light chain immunofluoresence (IF) in renal biopsy is routinely used in the diagnosis of light chain deposition disease (LCDD), amyloidosis and cast nephropathy. Light chain predominance has also been reported in certain glomerulopathies like IgA nephropathy. However, pathogenesis of this pattern of deposition in various glomerulopathies is uncertain. AIM: To discuss the pathogenesis and utility of light chain IF in nephropathies. SETTING AND DESIGN: Retrospective study. MATERIALS AND METHODS: The pattern of light chain IF and light microscopic diagnosis in 306 cases of various nephropathies was reviewed. Direct IF was done in all these cases with commercial fluorescence (Fluoresciene Isothiocynate ) conjugated polyclonal rabbit anti-human antisera against IgM, IgG, IgA, C3, C1q, kappa and lambda light chains. RESULTS: Light chain deposits were seen in 240 (78.43%) cases. In IgA nephropathy, lupus nephritis and post-infectious glomerulonephritis (PIGN), lambda positivity was more as compared to kappa. Light chain deposits in LCDD and membranous nephropathy were more kappa type. The IF pattern in amyloidosis was not consistent. CONCLUSION: The pathogenesis of light chain predominance in glomerulopathies is not clear and it depends on isoelectric point and size of the immune complex. Light chain IF should be performed routinely in all the renal biopsies. FAU - Uppin, Megha S AU - Uppin MS AD - Department of Pathology, Nizam's Institute of Medical Sciences, Hyderabad 500 082, Andhra Pradesh, India. megha_harke@yahoo.co.in FAU - Prayaga, Aruna K AU - Prayaga AK FAU - Srinivas, B H AU - Srinivas BH FAU - Rapur, Ram AU - Rapur R FAU - Desai, Madhav AU - Desai M FAU - Dakshina Murthy, K V AU - Dakshina Murthy KV LA - eng PT - Journal Article PL - India TA - Indian J Pathol Microbiol JT - Indian journal of pathology & microbiology JID - 7605904 RN - 0 (Complement C3) RN - 0 (Immunoglobulin Light Chains) RN - 80295-33-6 (Complement C1q) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Child MH - Child, Preschool MH - Complement C1q/analysis MH - Complement C3/analysis MH - Female MH - *Fluorescent Antibody Technique MH - Humans MH - Immunoglobulin Light Chains/*analysis MH - Infant MH - Kidney Diseases/*pathology MH - Male MH - Middle Aged MH - Retrospective Studies MH - Young Adult EDAT- 2011/03/12 06:00 MHDA- 2011/06/21 06:00 CRDT- 2011/03/12 06:00 PHST- 2011/03/12 06:00 [entrez] PHST- 2011/03/12 06:00 [pubmed] PHST- 2011/06/21 06:00 [medline] AID - IndianJPatholMicrobiol_2011_54_1_55_77325 [pii] AID - 10.4103/0377-4929.77325 [doi] PST - ppublish SO - Indian J Pathol Microbiol. 2011 Jan-Mar;54(1):55-8. doi: 10.4103/0377-4929.77325.