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Li WX, Cai LT, Huang YP, Huang YQ, Pan SH, Liu ZL, Ndandala CB, Shi G, Deng SP, Shi HJ, Li GL, Jiang DN. Sequence identification and expression characterization of leptin in the spotted scat, Scatophagus argus. Comp Biochem Physiol B Biochem Mol Biol 2024; 269:110882. [PMID: 37562672 DOI: 10.1016/j.cbpb.2023.110882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 08/06/2023] [Accepted: 08/07/2023] [Indexed: 08/12/2023]
Abstract
Scatophagus argus is an important marine culture fish in South and South-East Asia, including Southeast coastal areas of China. Artificial propagation technology for S. argus is not optimum; thus further studies on its reproduction biology are required. Although previous studies have shown that leptin (Lep) can regulate fish reproduction, the role of lep genes in S. argus is unknown. Herein, in silico analysis showed that S. argus has two lep genes (lepa and lepb). Protein 3D-structure prediction showed that Lepa has four α-helices (similar to mammals), while Lepb only has three. Tissue distribution analysis showed that lepa is highly expressed in the liver, whereas lepb was not detected in any tissue. Notably, lepr was expressed in all tissues. Lepa mRNA expression levels in the liver and serum Lep, estradiol (E2) and vitellogenin (Vtg) levels of female fish were significantly higher in ovaries at stage IV than in ovaries at stage II. Serum E2 levels were significantly positively correlated with Vtg levels in female fish at different development stages, while serum E2 was not correlated with Lep levels. Consistently, in vitro incubation of the liver with E2 significantly up-regulated vtga, while it did not affect lepa expression. Recombinant Lep (10 nM) significantly up-regulated chicken gonadotropin-releasing hormone (cGnRH/GnRH-II) in the hypothalamus and GnRH receptor (GnRHR) and luteinizing hormone beta (Lhb) in the pituitary. These results suggest that lepa regulates female reproduction in S. argus.
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Affiliation(s)
- Wan-Xin Li
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Li-Ting Cai
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Yan-Ping Huang
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Yuan-Qing Huang
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Shu-Hui Pan
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Zhi-Long Liu
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Charles Brighton Ndandala
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Gang Shi
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Si-Ping Deng
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Hong-Juan Shi
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Guang-Li Li
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China
| | - Dong-Neng Jiang
- Fisheries College of Guangdong Ocean University, Guangdong Province Famous Fish Reproduction Regulation and Breeding Engineering Technology Research Center, Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture, 524088 Zhanjiang, China.
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Bakshi A, Rai U. Reproductive phase-dependent and sexually dimorphic expression of leptin and its receptor in different parts of brain of spotted snakehead Channa punctata. JOURNAL OF FISH BIOLOGY 2023; 102:904-912. [PMID: 36704849 DOI: 10.1111/jfb.15334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
The reproductive phase-wise leptin (lep) and its receptor (lepr) expression in different parts of the brain of adult male and female spotted snakehead Channa punctata reveals sexual dimorphism in the brain leptin system. In anterior, middle and posterior parts of the brain of males, a maximum lep was observed in resting, spawning and postspawning reproductive phases, respectively. In females, a high level of lep was seen during the preparatory phase in the anterior brain, preparatory and postspawning phases in the middle brain and resting and postspawning phases in the posterior brain. Nonetheless, the transcript level of lepr was recorded highest during the spawning phase, irrespective of sex and region of the brain. Regardless of the reproductive state of fishes, lep and lepr were seen considerably high in middle and posterior parts of male brain than that of female, implying the involvement of factors other than sex steroids for sex-related variation in the leptin system in these regions of the brain. Nonetheless, no sex difference was evidenced in the expression of either ligand or its receptor in the anterior brain. In summary, the presence of lep and lepr in different regions of the brain and variation in their expression depending on sex and reproductive phases raise the possibility of pivotal actions of leptin in influencing neuronal circuitry and thereby reproductive functions.
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Affiliation(s)
- Amrita Bakshi
- Department of Zoology, Ramjas College, University of Delhi, Delhi, India
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Bakshi A, Rai U. Seasonality, sex-specificity and transcriptional regulation of hepatic leptin system in spotted snakehead Channa punctata. Gen Comp Endocrinol 2021; 310:113821. [PMID: 34015346 DOI: 10.1016/j.ygcen.2021.113821] [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: 01/04/2021] [Revised: 05/13/2021] [Accepted: 05/13/2021] [Indexed: 01/02/2023]
Abstract
The present study deals with sex-specific reproductive phase-dependent variation and sex steroids-induced transcriptional regulation of hepatic lep and lepr in nutritionally valuable spotted snakehead, Channa punctata. The data on seasonality reveals sex-specific variation in pattern of lep transcription where a high level was recorded during resting and postspawning quiescent phases in female while during resting and spawning phases in male. Unlike lep, lepr exhibited similar expression pattern along the reproductive phases in both the sexes. As compared to female, a three-fold higher expression of lep was detected in male during reproductively active phase only. However, no sexual dimorphism was evidenced in lepr either during active or quiescent phase. To explore the implication of sex steroids in regulation of leptin system, we correlated levels of plasma testosterone (T) and 17β-estradiol (E2) with leptin system in males as well as females. Further, criss-cross in vivo and in vitro experiments with dihydrotestosterone (DHT) and E2 were conducted in male and female spotted snakehead. The leptin system was downregulated after DHT administration in both the sexes. However, with E2, a marked decrease was evidenced in male only. The sex-wise variable response of leptin system to sex steroids was validated by in vitro experiments wherein liver fragments from male and female fish were incubated individually with both the sex steroids. In conclusion, sex steroids modulate hepatic leptin system differentially depending on sex and reproductive state of spotted snakehead.
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Affiliation(s)
- Amrita Bakshi
- Department of Zoology, University of Delhi, Delhi 110007, India
| | - Umesh Rai
- Department of Zoology, University of Delhi, Delhi 110007, India.
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Bakshi A, Singh R, Rai U. Trajectory of leptin and leptin receptor in vertebrates: Structure, function and their regulation. Comp Biochem Physiol B Biochem Mol Biol 2021; 257:110652. [PMID: 34343670 DOI: 10.1016/j.cbpb.2021.110652] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 06/23/2021] [Accepted: 07/29/2021] [Indexed: 12/11/2022]
Abstract
The present review provides a comparative insight into structure, function and control of leptin system in fishes, herptiles, birds and mammals. In general, leptin acts as an anorexigenic hormone since its administration results in decrease of food intake in vertebrates. Nonetheless, functional paradox arises in fishes from contradictory observations on level of leptin during fasting and re-feeding. In addition, leptin is shown to modulate metabolic functions in fishes, reptiles, birds and mammals. Leptin also regulates reproductive and immune functions though more studies are warranted in non-mammalian vertebrates. The expression of leptin and its receptor is influenced by numerous factors including sex steroids, stress and stress-induced catecholamines and glucocorticoids though their effect in non-mammalian vertebrates is hard to be generalized due to limited studies.
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Affiliation(s)
- Amrita Bakshi
- Department of Zoology, University of Delhi, Delhi 110007, India
| | - Rajeev Singh
- Satyawati College, University of Delhi, Delhi 110052, India
| | - Umesh Rai
- Department of Zoology, University of Delhi, Delhi 110007, India.
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Wang B, Cui A, Wang P, Zhang Y, Liu X, Jiang Y, Xu Y. Temporal expression profiles of leptin and its receptor genes during early development and ovarian maturation of Cynoglossus semilaevis. FISH PHYSIOLOGY AND BIOCHEMISTRY 2020; 46:359-370. [PMID: 31745813 DOI: 10.1007/s10695-019-00722-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 10/18/2019] [Indexed: 06/10/2023]
Abstract
Leptin (Lep) plays a key role in the regulation of food intake and energy homeostasis in vertebrates. Our previous studies have provided evidence for the existence of two leptin genes (lepa and lepb) and one leptin receptor (lepr) gene in a flatfish, the half-smooth tongue sole (Cynoglossus semilaevis). However, the spatial-temporal expression patterns and possible roles of the leptin system during early development and ovarian maturation are still poorly understood in teleosts. In the current study, we evaluated dynamic expression profiles of lepa, lepb, and lepr mRNAs during various developmental stages in this species. Quantitative RT-PCR analysis indicated that both ligand (lepa and lepb) and receptor (lepr) genes were detected in unfertilized eggs and during embryogenesis but with different expression profiles. In addition, lepa, lepb, and lepr transcripts levels increased significantly during larval development, reaching the peak at 10, 25, and 30 days post-hatching (dph), respectively. On the other hand, changes in mRNA expression of these three genes at the brain-pituitary-gonad (BPG) axis were also investigated during ovarian maturation, and lepa, lepb, and lepr mRNAs varied greatly. Taken together, our results encompass the first study reporting the dynamic expression patterns of leptin and its receptor mRNAs in the order Pleuronectiformes, providing evidence that the leptin system could be functional and play important roles during early development and ovarian maturation in tongue sole.
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Affiliation(s)
- Bin Wang
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao, 266071, China
- Laboratory for Marine Fisheries and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266071, China
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Aijun Cui
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao, 266071, China
- Laboratory for Marine Fisheries and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266071, China
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Pengfei Wang
- South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, Guangzhou, 510300, China
| | - Yaxing Zhang
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao, 266071, China
- Laboratory for Marine Fisheries and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266071, China
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Xuezhou Liu
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao, 266071, China
- Laboratory for Marine Fisheries and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266071, China
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Yan Jiang
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao, 266071, China
- Laboratory for Marine Fisheries and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266071, China
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Yongjiang Xu
- Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Qingdao, 266071, China.
- Laboratory for Marine Fisheries and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266071, China.
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.
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Bakshi A, Rai U. Reproductive phase-dependent variation, sexually dimorphic expression and sex steroids-mediated transcriptional regulation of lep and lepr in lymphoid organs of Channa punctata. Sci Rep 2020; 10:999. [PMID: 31969648 PMCID: PMC6976713 DOI: 10.1038/s41598-020-57922-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 12/07/2019] [Indexed: 01/08/2023] Open
Abstract
The reproductive phase-dependent and sex-related differential expression of leptin (lep) and its receptor (lepr) in primary and secondary lymphoid organs of a highly nutritive economically important Channa punctata preempts the involvement of sex steroids in modulating intra-immuno-leptin system. This hypothesis was strengthened when plasma testosterone (T) and estradiol (E2) levels in male and female fish of reproductively active spawning and quiescent phases were correlated with lep and lepr expression in their immune organs. Splenic lep and lepr showed a negative correlation with T in both male and female, while with E2 there was a positive correlation in male and negative in female C. punctata. In head kidney, a contrasting correlation was observed as compared to spleen. To validate the implication of sex steroids in regulating leptin system in immune organs, in vivo and in vitro experiments were performed with DHT and E2. Upon administration, lep and lepr expression in tissues of either sex was downregulated. In addition, in vitro results with either of the sex steroids exemplified their direct involvement. Overall, this study, for the first time, reports correlation between sex steroids and transcript expression of leptin system in immune organs of a seasonally breeding vertebrate.
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Affiliation(s)
- Amrita Bakshi
- Department of Zoology, University of Delhi, Delhi, 110007, India
| | - Umesh Rai
- Department of Zoology, University of Delhi, Delhi, 110007, India.
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Shaikat AH, Namekawa S, Ahmadi S, Takeda M, Ohkubo T. Gene expression profiling in embryonic chicken ovary during asymmetric development. Anim Sci J 2017; 89:688-694. [PMID: 29282806 DOI: 10.1111/asj.12979] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 11/12/2017] [Indexed: 01/19/2023]
Abstract
The reproductive system in female birds arises as bilateral asymmetrical anlagen, excluding the birds of prey. Earlier, histological and messenger RNA (mRNA) expression profile studies of several genes related to gonadal sex differentiation in chicken embryos tried to elucidate the query of this asymmetry in a scattered manner. To understand the matter precisely, we have focused on mRNA expression of a cohort of genes (FSHR, CYP19A1, caspase 3, caspase 8) in second half of the embryonic days (E10-E18). The established role of leptin in development of the embryo and its expression in the embryonic ovary also drove us to check leptin receptor (LEPR) expression in the ovary. Increased expression of FSHR and CYP19A1 in the left ovary compared with that in the right ovary was identified (P < 0.05), promoting preferential left ovarian development and functionality. Significant high expression (P < 0.05) of the apoptotic genes in the right ovary were also involved here. Leptin probably has no direct influence on ovarian asymmetry as no significant variation in gonadal mRNA expression of LEPR was observed within the same experimental days. We propose that asymmetric expression of this cohort of genes (FSHR, CYP19A1, caspase 3, caspase 8) leads to the development of dimorphic gonads during embryogenesis.
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Affiliation(s)
- Amir Hossan Shaikat
- College of Agriculture, Ibaraki University, Ami, Ibaraki, Japan.,United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Shoko Namekawa
- College of Agriculture, Ibaraki University, Ami, Ibaraki, Japan
| | | | - Misa Takeda
- College of Agriculture, Ibaraki University, Ami, Ibaraki, Japan
| | - Takeshi Ohkubo
- College of Agriculture, Ibaraki University, Ami, Ibaraki, Japan.,United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
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Tian HF, Hu QM, Meng Y, Xiao HB. Molecular cloning, characterization and evolutionary analysis of leptin gene in Chinese giant salamander, Andrias davidianus. Open Life Sci 2017. [DOI: 10.1515/biol-2017-0048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractLeptin is an important hormone possessing diverse physiological roles in mammals and teleosts. However, it has been characterized only in a few amphibian species, and its evolutions are still under debate. Here, the full length of the leptin (Adlep) cDNA of Chinese giant salamander (Andrias davidianus), an early diverging amphibian species, is characterized and according to the results of the primary sequence analysis, tertiary structure reconstruction and phylogenetic analysis is confirmed to be an ortholog of mammalian leptin. An intron was identified between the coding exons of A. davidianus leptin, which indicated that the leptin is present in the salamander genome and contains a conserved gene structure in vertebrates. Adlep is widely distributed but expression levels vary among different tissues, with highest expression levels in the muscle. Additionally, the leptin receptor and other genes were mapped to three known leptin signaling pathways, suggesting that the leptin signaling pathways are present in A. davidianus. Phylogenetic topology of leptins are consistent with the generally accepted evolutionary relationships of vertebrates, and multiple leptin members found in teleosts seem to be obtained through a Cluopeocephala-specific gene duplication event. Our results will lay a foundation for further investigations into the physiological roles of leptin in A. davidianus.
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Affiliation(s)
- Hai-feng Tian
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan430223, P. R. China
| | - Qiao-mu Hu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan430223, P. R. China
| | - Yan Meng
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan430223, P. R. China
| | - Han-bing Xiao
- No. 8, 1st Wudayuan Road, Donghu Hi-Tech Development Zone, Wuhan430223, China
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Wan SM, Liu H, Zhao BW, Nie CH, Wang WM, Gao ZX. Construction of a high-density linkage map and fine mapping of QTLs for growth and gonad related traits in blunt snout bream. Sci Rep 2017; 7:46509. [PMID: 28422147 PMCID: PMC5395971 DOI: 10.1038/srep46509] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 03/17/2017] [Indexed: 01/16/2023] Open
Abstract
High-density genetic maps based on SNPs are essential for fine mapping loci controlling specific traits for fish species. Using restriction-site associated DNA tag sequencing (RAD-Seq) technology, we identified 42,784 SNPs evenly distributed across the Megalobrama amblycephala genome. Based on 2 parents and 187 intra-specific hybridization progenies, a total of 14,648 high-confidence SNPs were assigned to 24 consensus linkage groups (LGs) of maternal and paternal map. The total length of the integrated map was 3,258.38 cM with an average distance of 0.57 cM among 5676 effective loci, thereby representing the first high-density genetic map reported for M. amblycephala. A total of eight positive quantitative trait loci (QTLs) were detected in QTL analysis. Of that, five QTL explained ≥35% of phenotypic variation for growth traits and three QTL explained ≥16% phenotypic variation for gonad related traits. A total of 176 mapped markers had significant hits in the zebrafish genome and almost all of the 24 putative-chromosomes of M. amblycephala were in relatively conserved synteny with chromosomes of zebrafish. Almost all M. amblycephala and zebrafish chromosomes had a 1:1 correspondence except for putative-chromosome 4, which mapped to two chromosomes of zebrafish caused by the difference in chromosome numbers between two species.
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Affiliation(s)
- Shi-Ming Wan
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Hong Liu
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Bo-Wen Zhao
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Chun-Hong Nie
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China
| | - Wei-Min Wang
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Ze-Xia Gao
- College of Fisheries, Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education/Key Lab of Freshwater Animal Breeding, Ministry of Agriculture, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.,Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan 430070, China
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Volkoff H, Estevan Sabioni R, Coutinho LL, Cyrino JEP. Appetite regulating factors in pacu (Piaractus mesopotamicus): Tissue distribution and effects of food quantity and quality on gene expression. Comp Biochem Physiol A Mol Integr Physiol 2016; 203:241-254. [PMID: 27717774 DOI: 10.1016/j.cbpa.2016.09.022] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 09/22/2016] [Accepted: 09/27/2016] [Indexed: 12/22/2022]
Abstract
The pacu Piaractus mesopotamicus is an omnivorous fish considered a promising species for aquaculture. Little is known about the endocrine regulation of feeding in this species. In this study, transcripts for orexin, cocaine and amphetamine regulated transcript (CART), cholecystokinin (CCK) and leptin were isolated in pacu. Orexin, CCK and leptin have widespread mRNA distributions in brain and periphery, CART is limited to the brain. To examine the role of these peptides in the regulation of feeding and energy status, mRNA expression levels were compared between fed and fasted fish and around feeding time. Both orexin and CART brain expressions were affected by fasting and displayed periprandial changes, suggesting a role in both short- and long-term regulation of feeding. CCK intestinal expression decreased in fasted fish and displayed periprandial changes, suggesting CCK acts as a peripheral satiety factor. Leptin was not affected by fasting but displayed periprandial changes, suggesting a role as a short-term regulator. To examine if these peptides are affected by diet, brain and gut expressions were assessed in fish fed with different diets containing soy protein concentrate. Food intake, weight gain and expressions of orexin, CART, CCK and leptin were little affected by replacement of fish protein with soy protein, suggesting that pacu is able to tolerate and grow well with a diet rich in plant material. Overall, our results suggest that orexin, CART, CCK and leptin are involved in the physiology of feeding of pacu and that their expressions are little affected by plant-based diets.
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Affiliation(s)
- Hélène Volkoff
- Department of Biology, Memorial University of Newfoundland, St. John's, NL A1B3X9, Canada; Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B3X9, Canada.
| | - Rafael Estevan Sabioni
- Departamento de Zootecnia, Setor de Piscicultura, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, 13418-900 Piracicaba, SP, Brazil
| | - Luiz Lehmann Coutinho
- Departamento de Zootecnia, Laboratório de Biotecnologia Animal, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, 13418-900 Piracicaba, SP, Brazil
| | - José Eurico Possebon Cyrino
- Departamento de Zootecnia, Setor de Piscicultura, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo, 13418-900 Piracicaba, SP, Brazil
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