1
|
Murata R, Kubo U, Yoshida S, Mushirobira Y, Soyano K. Water temperature effects on embryonic development and GnRH-like expression in kisslip cuttlefish (Sepia lycidas) hinting the potential role of GnRH-like peptide. Comp Biochem Physiol A Mol Integr Physiol 2024; 296:111681. [PMID: 38878879 DOI: 10.1016/j.cbpa.2024.111681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/28/2024] [Accepted: 06/12/2024] [Indexed: 06/18/2024]
Abstract
Gonadotropin-releasing hormone (GnRH)-like peptides are multifunctional neuropeptides involved in cardiac control, early ontogenesis, and reproduction in cephalopods. However, the precise role of GnRH-like peptides in embryonic development and juvenile growth in cephalopods remains unknown. In this study, we showed that GnRH-like peptides are involved in the embryonic development of kisslip cuttlefish (Sepia lycidas). We confirmed that higher water temperatures induced early hatching. Simultaneously, we found that brain GnRH-like peptide gene expression gradually increased with increasing hatching speed. However, the rise in water temperature within a suitable range had no effect on the juvenile sex ratio or early gonadal development. Our results indicate that GnRH-like peptides may play an accelerating role in embryonic development; however, they are not involved in sex determination or early gonadal development in kisslip cuttlefish.
Collapse
Affiliation(s)
- Ryosuke Murata
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan.
| | - Umina Kubo
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan; Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki 852-8521, Nagasaki, Japan
| | - Shoma Yoshida
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki 852-8521, Nagasaki, Japan
| | - Yuji Mushirobira
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan; Faculty of Agriculture and Marine Science, Kochi University, 200 Monobe-Otsu, Nankoku, Kochi 783-8502, Japan
| | - Kiyoshi Soyano
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, 1551-7, Taira-machi, Nagasaki 851-2213, Nagasaki, Japan
| |
Collapse
|
2
|
Murata R, Mushirobira Y, Tanaka Y, Soyano K. Expression profile of GnRH-like peptide during gonadal sex differentiation in the cephalopod kisslip cuttlefish, Sepia lycidas. Gen Comp Endocrinol 2021; 304:113718. [PMID: 33476661 DOI: 10.1016/j.ygcen.2021.113718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 12/25/2020] [Accepted: 01/14/2021] [Indexed: 11/15/2022]
Abstract
Gonadotropin-releasing hormone (GnRH) is one of the most important neuroendocrine regulators for animal reproduction. GnRH-like peptide (GnRH-like) has recently been shown to play a critical reproductive role mainly in gametogenesis or steroidogenesis in the gonads of some molluscs, including cephalopods. However, its involvement in gonadal sex differentiation remains unknown. Here, we show the expression profile of GnRH-like in the brain of the cephalopod kisslip cuttlefish, Sepia lycidas, throughout gonadal sex differentiation, by quantitative real time RT-PCR and immunohistochemistry. We found that GnRH-like could be detected in the brain at a sexually undifferentiated stage, and its expression level significantly increased upon initiation of gonadal sex differentiation. However, no significant difference in GnRH-like expression levels was observed between sexes during gonadal sex differentiation. Additionally, we demonstrated immunoreactivity of GnRH-like in glial cells or immature neurons, which are mainly distributed in the non-reproductive related area of the cephalopod brain, suggesting the immature function of the reproductive endocrine axis during early ontogenesis. Our results demonstrate for the first time, the expression profile of GnRH-like during early ontogenesis in cephalopods.
Collapse
Affiliation(s)
- Ryosuke Murata
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, Taira-machi, Nagasaki 851-2213, Japan.
| | - Yuji Mushirobira
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, Taira-machi, Nagasaki 851-2213, Japan
| | | | - Kiyoshi Soyano
- Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, Taira-machi, Nagasaki 851-2213, Japan
| |
Collapse
|
3
|
A high-resolution melting analysis method for the effective discrimination of three Sepia species. J Verbrauch Lebensm 2020. [DOI: 10.1007/s00003-020-01289-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|