PMID- 35448517 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220716 IS - 2218-1989 (Print) IS - 2218-1989 (Electronic) IS - 2218-1989 (Linking) VI - 12 IP - 4 DP - 2022 Apr 6 TI - Soy Phospholipids Exert a Renoprotective Effect by Inhibiting the Nuclear Factor Kappa B Pathway in Macrophages. LID - 10.3390/metabo12040330 [doi] LID - 330 AB - Complications associated with chronic kidney disease (CKD), which involves kidney inflammation, are a major health problem. Soy protein isolate (SPI) reportedly inhibits CKD exacerbation; however, its detailed action mechanism remains obscure. Therefore, the role of the polar lipid component of SPI in suppressing inflammation was investigated. Zucker fatty rats were divided into three groups and fed a diet containing casein, SPI, or casein + SPI ethanol extract (SPIEE) for 16 weeks. The isoflavones and phospholipids of SPIEE were evaluated for their anti-inflammatory effects. Rats in the SPI and casein + SPIEE groups showed reduced levels of the urinary N-acetyl-beta-d-glucosaminidase and renal IL-1beta mRNA (an inflammatory marker) compared with those in the casein group. In proximal tubular cells, genistein significantly inhibited monocyte chemoattractant protein-1 (MCP-1) expression induced by an IL-1beta stimulus. In macrophages, soybean phospholipids suppressed lipopolysaccharide-induced IL-1beta gene expression by inhibiting the phosphorylation of inhibitor kappaB and p65. Phosphatidylinositol (PI) was found to be essential for inhibition of IL-1beta expression. SPIEE inhibited the exacerbation of kidney disease. Genistein and soybean phospholipids, especially soybean-specific phospholipids containing PI, effectively inhibited the inflammatory spiral in vitro. Hence, daily soybean intake may be effective for inhibiting chronic inflammation and slowing kidney disease progression. FAU - Ohta, Satoshi AU - Ohta S AD - Research Institute for Creating the Future, Fuji Oil Holdings Inc., 4-3 Kinunodai, Tsukubamirai-shi 300-2497, Ibaraki, Japan. FAU - Asanoma, Masashi AU - Asanoma M AD - Soy Ingredients R&D Department, Fuji Oil Co., Ltd., 1 Sumiyoshicho, Izumisano-shi 598-8540, Osaka, Japan. FAU - Irie, Nao AU - Irie N AD - Research Institute for Creating the Future, Fuji Oil Holdings Inc., 4-3 Kinunodai, Tsukubamirai-shi 300-2497, Ibaraki, Japan. FAU - Tachibana, Nobuhiko AU - Tachibana N AD - Research Institute for Creating the Future, Fuji Oil Holdings Inc., 4-3 Kinunodai, Tsukubamirai-shi 300-2497, Ibaraki, Japan. FAU - Kohno, Mitsutaka AU - Kohno M AD - R&D Division Strategy Planning Department, Fuji Oil Co., Ltd., 1 Sumiyoshicho, Izumisano-shi 598-8540, Osaka, Japan. LA - eng PT - Journal Article DEP - 20220406 PL - Switzerland TA - Metabolites JT - Metabolites JID - 101578790 PMC - PMC9031346 OTO - NOTNLM OT - genistein OT - inflammation OT - kidney OT - macrophage OT - phospholipids OT - soy COIS- The authors are employees of Fuji Oil Holdings Inc. or Fuji Oil Co. Ltd. The authors declare no conflict of interest. EDAT- 2022/04/22 06:00 MHDA- 2022/04/22 06:01 PMCR- 2022/04/06 CRDT- 2022/04/21 20:19 PHST- 2022/03/11 00:00 [received] PHST- 2022/04/01 00:00 [revised] PHST- 2022/04/02 00:00 [accepted] PHST- 2022/04/21 20:19 [entrez] PHST- 2022/04/22 06:00 [pubmed] PHST- 2022/04/22 06:01 [medline] PHST- 2022/04/06 00:00 [pmc-release] AID - metabo12040330 [pii] AID - metabolites-12-00330 [pii] AID - 10.3390/metabo12040330 [doi] PST - epublish SO - Metabolites. 2022 Apr 6;12(4):330. doi: 10.3390/metabo12040330.