PMID- 37966680 OWN - NLM STAT- MEDLINE DCOM- 20240101 LR - 20240106 IS - 1573-5168 (Electronic) IS - 0920-1742 (Linking) VI - 49 IP - 6 DP - 2023 Dec TI - Kisspeptin modulation of nonapeptide and cytochrome P450 aromatase mRNA expression in the brain and ovary of the catfish Heteropneustes fossilis: in vivo and in vitro studies. PG - 1489-1509 LID - 10.1007/s10695-023-01270-w [doi] AB - In Heteropneustes fossilis, kisspeptins (Kiss) and nonapeptides (NPs; vasotocin, Vt; isotocin, Itb; Val8-isotocin, Ita) stimulate the hypothalamus-pituitary-gonadal (HPG) axis, and estrogen feedback modulates the expression of these systems. In this study, functional interactions among these regulatory systems were demonstrated in the brain and ovary at the mRNA expression level. Human KISS1 (hKISS1) and H. fossilis Kiss2 (HfKiss2) produced biphasic effects on brain and ovarian vt, itb and ita expression at 24 h post injection: low and median doses produced inhibition, no change or mild stimulation, and the highest dose consistently stimulated the mRNA levels. The Kiss peptides produced an upregulation of NP mRNA expression at 24 h incubation of brain and ovarian slices by increasing the concentration of hKISS1 and HfKiss2. The kiss peptides stimulated brain cyp19a1b and ovary cyp19a1a expression, both in vivo and in vitro. Peptide234, a Kiss1 receptor antagonist, inhibited basal mRNA expression of the NPs, cyp19a1b and cyp19a1a, which was prevented by the Kiss peptides, both in vivo and in vitro. In all the experiments, HfKiss2 was more effective than hKISS1 in modulating mRNA expression. The results suggest that the NP and E(2) systems are functional targets of Kiss peptides and interact with each other. CI - (c) 2023. The Author(s), under exclusive licence to Springer Nature B.V. FAU - Chaube, Radha AU - Chaube R AD - Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India. FAU - Sharma, Sandhya AU - Sharma S AD - Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India. FAU - Joy, Keerikkattil AU - Joy K AD - , Ernakulam, India. LA - eng PT - Journal Article DEP - 20231115 PL - Netherlands TA - Fish Physiol Biochem JT - Fish physiology and biochemistry JID - 100955049 RN - 0 (Kisspeptins) RN - EC 1.14.14.1 (Aromatase) RN - 0 (RNA, Messenger) SB - IM MH - Female MH - Humans MH - Animals MH - *Ovary/metabolism MH - Kisspeptins/genetics/pharmacology/metabolism MH - *Catfishes/metabolism MH - Aromatase/genetics/metabolism MH - Brain/metabolism MH - RNA, Messenger/genetics/metabolism OTO - NOTNLM OT - Catfish brain and ovary OT - Nonapeptide gene expression OT - P450 aromatase expression OT - Synthetic Kiss peptides EDAT- 2023/11/15 12:43 MHDA- 2024/01/02 11:46 CRDT- 2023/11/15 11:12 PHST- 2022/09/19 00:00 [received] PHST- 2023/11/09 00:00 [accepted] PHST- 2024/01/02 11:46 [medline] PHST- 2023/11/15 12:43 [pubmed] PHST- 2023/11/15 11:12 [entrez] AID - 10.1007/s10695-023-01270-w [pii] AID - 10.1007/s10695-023-01270-w [doi] PST - ppublish SO - Fish Physiol Biochem. 2023 Dec;49(6):1489-1509. doi: 10.1007/s10695-023-01270-w. Epub 2023 Nov 15.