PMID- 35782343 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220716 IS - 2040-6223 (Print) IS - 2040-6231 (Electronic) IS - 2040-6223 (Linking) VI - 13 DP - 2022 TI - Elevated activating Fc gamma receptors levels correlated with susceptibility and severity of IgA nephropathy. PG - 20406223221106878 LID - 10.1177/20406223221106878 [doi] LID - 20406223221106878 AB - BACKGROUND: It is still uncertain if a dysregulated expression of activating Fc gamma receptors (FcgammaRs) is associated with the development of immunoglobulin A nephropathy (IgAN). METHODS: RNA sequencing was used to determine the mRNA levels of type I FcgammaRs, which were then verified by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). Commercial ELISA kits were used to detect plasma soluble FcgammaRIIIb (sFcgammaRIIIb). RESULTS: We first examined the expression of FcgammaRs genes in 17 patients with IgAN and six healthy controls. The expression of FcgammaRIa, FcgammaRIb, FcgammaRIIa, FcgammaRIIc, FcgammaRIIIa, and FcgammaRIIIb was shown to be higher in IgAN patients. Even without statistical significance, there was a downward trend in FcgammaRIIb mRNA levels in IgAN. We observed that the expression levels of activating FcgammaR mRNAs were consistently higher in an independent set of 20 IgAN patients and 20 healthy controls, confirming the RNA-seq results. FcgammaRIIIb was the IgG receptor with the greatest difference in expression between the two groups (log(2) fold-change = 1.82). We observed a much higher percent of FcgammaRIIIb positive cells in IgAN by flow cytometry. Next, we measured plasma sFcRIIIb levels in 50 patients with IgAN and 50 healthy controls. The findings revealed that the mean sFcgammaRIIIb level in plasma in participants with IgAN was much higher than that of healthy controls. Increased sFcgammaRIIIb levels were associated with a substantial increase in body mass index (BMI), lipid levels, serum creatinine level, and a larger percentage of sclerosis compared with lower sFcRIIIb levels. Patients in the group with higher sFcgammaRIIIb levels were more likely to get glucocorticoid treatment. CONCLUSION: The results demonstrated that the mRNA levels of the activating Fc receptor of IgG were significantly increased in IgAN. Patients with higher plasma sFcgammaRIIIb levels may have had more severe illness than those with lower levels. CI - (c) The Author(s), 2022. FAU - Li, Hongfen AU - Li H AD - Department of Nephrology, Tianjin Medical University General Hospital, Tianjin, P.R. China. FAU - Liu, Youxia AU - Liu Y AUID- ORCID: 0000-0002-9058-0218 AD - Department of Nephrology, Tianjin Medical University General Hospital, No. 154, Anshan Road, Heping District, Tianjin 300052, P.R. China. FAU - Yu, Huyan AU - Yu H AD - Department of Nephrology, Yunfu People's Hospital, Yunfu, Guangdong province, P.R. China. FAU - Wang, Fanghao AU - Wang F AD - Department of Nephrology, Tianjin Medical University General Hospital, Tianjin, P.R. China. FAU - Jia, Junya AU - Jia J AD - Department of Nephrology, Tianjin Medical University General Hospital, Tianjin, P.R. China. FAU - Yan, Tiekun AU - Yan T AD - Department of Nephrology, Tianjin Medical University General Hospital, Tianjin, P.R. China. FAU - Lin, Shan AU - Lin S AD - Department of Nephrology, Tianjin Medical University General Hospital, No. 154, Anshan Road, Heping District, Tianjin 300052, P.R. China. LA - eng PT - Journal Article DEP - 20220627 PL - United States TA - Ther Adv Chronic Dis JT - Therapeutic advances in chronic disease JID - 101532140 PMC - PMC9243373 OTO - NOTNLM OT - IgA nephropathy OT - activating Fc gamma receptors OT - disease severity OT - soluble FcgammaRIIIb COIS- Conflict of interest statement: The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. EDAT- 2022/07/06 06:00 MHDA- 2022/07/06 06:01 PMCR- 2022/06/27 CRDT- 2022/07/05 09:49 PHST- 2022/03/27 00:00 [received] PHST- 2022/05/19 00:00 [accepted] PHST- 2022/07/05 09:49 [entrez] PHST- 2022/07/06 06:00 [pubmed] PHST- 2022/07/06 06:01 [medline] PHST- 2022/06/27 00:00 [pmc-release] AID - 10.1177_20406223221106878 [pii] AID - 10.1177/20406223221106878 [doi] PST - epublish SO - Ther Adv Chronic Dis. 2022 Jun 27;13:20406223221106878. doi: 10.1177/20406223221106878. eCollection 2022.