PMID- 7958970 OWN - NLM STAT- MEDLINE DCOM- 19941201 LR - 20190707 IS - 0378-1119 (Print) IS - 0378-1119 (Linking) VI - 148 IP - 2 DP - 1994 Oct 21 TI - Cloning and expression of the gene encoding the porcine NADPH oxidase light-chain subunit (p22-phox). PG - 363-7 AB - In previous studies, we showed that interleukin-4 (IL-4) suppressed porcine (p) macrophage superoxide production and that the mechanism of suppression involved down-regulation of the superoxide-generating enzyme NADPH oxidase heavy-chain 91-kDa subunit mRNA (gp91-phox) expression. In order to examine the effect of IL-4 on expression of the gene encoding the porcine NADPH oxidase light-chain 22-kDa subunit (p22-phox), we cloned the p22-phox cDNA from a macrophage library. The p22-phox cDNA is 786 bp in length and contains a 576-bp open reading frame which predicts a primary translation product of 192 amino acids (aa). Comparison of the porcine and human 22-phox cDNAs showed a high degree of similarity between the two species in their nucleotide (85%) and deduced aa (83%) sequences. as well as in their hydropathy profiles. Notable features, including a high proline content and an iron-coordinating His94, are conserved in both the porcine and human 22-Phox. A single species of mRNA of about 1 kb was detected in macrophages. The mRNA levels remained unchanged in cells treated with lipopolysaccharide (LPS) or with IL-4 at various concentrations from 0-50 ng/ml. Prolonged treatment with LPS or IL-4 did not enhance the effect of these substances on p22-phox mRNA expression. The effect of IL-4 on p22-phox mRNA expression was also compared with another immunosuppressive cytokine, transforming growth factor-beta 1 (TGF beta 1). No change in mRNA expression was found in the cells with or without TGF beta 1 treatment. The results indicated that the heavy and light chains of NADPH oxidase are independently regulated by IL-4 in macrophages. FAU - Zhou, Y AU - Zhou Y AD - Department of Veterinary PathoBiology, College of Veterinary Medicine, University of Minnesota, St. Paul 55108. FAU - Murtaugh, M P AU - Murtaugh MP LA - eng SI - GENBANK/U02476 SI - GENBANK/U02477 PT - Journal Article PL - Netherlands TA - Gene JT - Gene JID - 7706761 RN - 0 (DNA, Complementary) RN - 0 (Membrane Transport Proteins) RN - 0 (Phosphoproteins) RN - 0 (RNA, Messenger) RN - 0 (Transforming Growth Factor beta) RN - 207137-56-2 (Interleukin-4) RN - EC 1.6.3.- (NADPH Oxidases) RN - EC 1.6.3.1 (CYBA protein, human) RN - EC 1.6.99.1 (NADPH Dehydrogenase) SB - IM MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - Cloning, Molecular MH - DNA, Complementary MH - Gene Expression Regulation, Enzymologic MH - Interleukin-4/pharmacology MH - Kinetics MH - Macrophages/metabolism MH - *Membrane Transport Proteins MH - Molecular Sequence Data MH - NADPH Dehydrogenase/*genetics MH - NADPH Oxidases MH - Phosphoproteins/*genetics MH - RNA, Messenger/genetics/metabolism MH - Swine MH - Transforming Growth Factor beta/pharmacology EDAT- 1994/10/21 00:00 MHDA- 1994/10/21 00:01 CRDT- 1994/10/21 00:00 PHST- 1994/10/21 00:00 [pubmed] PHST- 1994/10/21 00:01 [medline] PHST- 1994/10/21 00:00 [entrez] AID - 0378-1119(94)90714-5 [pii] AID - 10.1016/0378-1119(94)90714-5 [doi] PST - ppublish SO - Gene. 1994 Oct 21;148(2):363-7. doi: 10.1016/0378-1119(94)90714-5.