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Huang J, Zhu W, Peng M, Yang C, Chen X, Wu T, Zeng D, Zhao Y, Chen X. Cloning, Identification, and Functional Analysis of the Foxl2 Gene in Procambarus clarkii. Genes (Basel) 2023; 14:2190. [PMID: 38137012 PMCID: PMC10743188 DOI: 10.3390/genes14122190] [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: 11/05/2023] [Revised: 12/03/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
Procambarus clarkii is the most widely distributed freshwater shrimp in China, with important economic value and great potential for development. The forkheadboxL2 (Foxl2) gene has been found to be involved in the reproductive development of many crustaceans. To understand the role of the Foxl2 gene in the gonad development of P. clarkii, we designed CDS-specific primers for the P. clarkii Foxl2 (PcFoxl2) gene and cloned its CDS sequence using RT-PCR. The nucleotide and protein sequence information was then analyzed through bioinformatics analysis. The expression and subcellular localization of PcFoxl2 in various tissues were detected using qRT-PCR and in situ hybridization. The effects of PcFoxl2 knockdown on gonad development were investigated using RNA interference. The results showed that the CDS length of the PcFoxl2 gene was 1614 bp and encoded 537 amino acids. Protein sequence comparison and phylogenetic analysis showed that PcFoxl2 was the closest relative to Crayfish. qRT-PCR analysis indicated that the expression level of PcFoxl2 in the testis was significantly higher (>40 fold) than that in the ovary (p < 0.01). The in situ hybridization results showed that PcFoxl2 was expressed in both the cytoplasm and the nucleus of egg cells, and that the expression was strongest in egg cells at the early stage of yolk synthesis, while weak in the secondary oocytes. The positive signal was strongest in the spermatocyte nucleolus, while only a trace signal was observed in the cytoplasm. After interfering with the PcFoxl2 gene using dsRNA, the expression of PcFoxl2 in the RNA interference group was significantly lower than that in the control group, and this interference effect lasted for one week. Moreover, the gonad index of the experimental group was significantly lower than that of the control group (p < 0.05) after 10 days of P. clarkii cultivation following PcFoxl2 knockdown. The expression levels of the nanos and S3a genes, which are related to gonad development, decreased significantly after PcFoxl2 gene interference. The results suggest that the Foxl2 gene is involved in the growth and development of gonads, particularly in the development of testis, and is related to the early development of oocytes. This study provides a theoretical basis for the artificial breeding of P. clarkii.
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Affiliation(s)
- Jin Huang
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
- College of Animal Science and Technology, Guangxi University, Nanning 530005, China
| | - Weilin Zhu
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
| | - Min Peng
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
| | - Chunling Yang
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
| | - Xiaohan Chen
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
- College of Animal Science and Technology, Guangxi University, Nanning 530005, China
| | - Tiejun Wu
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
| | - Digang Zeng
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
| | - Yongzhen Zhao
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
| | - Xiuli Chen
- Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Science, Nanning 530021, China; (J.H.); (M.P.); (C.Y.); (X.C.); (T.W.); (D.Z.); (Y.Z.)
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Xue J, Zhang H, Zhao Q, Cui S, Yu K, Sun R, Yu Y. Construction of Yeast One-Hybrid Library of Alternaria oxytropis and Screening of Transcription Factors Regulating swnK Gene Expression. J Fungi (Basel) 2023; 9:822. [PMID: 37623593 PMCID: PMC10455089 DOI: 10.3390/jof9080822] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/30/2023] [Accepted: 07/31/2023] [Indexed: 08/26/2023] Open
Abstract
The indolizidine alkaloid-swainsonine (SW) is the main toxic component of locoweeds and the main cause of locoweed poisoning in grazing animals. The endophytic fungi, Alternaria Section Undifilum spp., are responsible for the biosynthesis of SW in locoweeds. The swnK gene is a multifunctional complex enzyme encoding gene in fungal SW biosynthesis, and its encoding product plays a key role in the multistep catalytic synthesis of SW by fungi using pipecolic acid as a precursor. However, the transcriptional regulation mechanism of the swnK gene is still unclear. To identify the transcriptional regulators involved in the swnK gene in endophytic fungi of locoweeds, we first analyzed the upstream non-coding region of the swnK gene in the A. oxytropis UA003 strain and predicted its high transcriptional activity region combined with dual-luciferase reporter assay. Then, a yeast one-hybrid library of A. oxytropis UA003 strain was constructed, and the transcriptional regulatory factors that may bind to the high-transcriptional activity region of the upstream non-coding region of the swnK gene were screened by this system. The results showed that the high transcriptional activity region was located at -656 bp and -392 bp of the upstream regulatory region of the swnK gene. A total of nine candidate transcriptional regulator molecules, including a C2H2 type transcription factor, seven annotated proteins, and an unannotated protein, were screened out through the Y1H system, which were bound to the upstream high transcriptional activity region of the swnK gene. This study provides new insight into the transcriptional regulation of the swnK gene and lays the foundation for further exploration of the regulatory mechanisms of SW biosynthesis in fungal endophytic locoweeds.
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Affiliation(s)
- Jiaqi Xue
- School of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Haodong Zhang
- School of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Qingmei Zhao
- College of Biological Science and Engineering, North Minzu University, Yinchuan 750021, China
| | - Shengwei Cui
- School of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Kun Yu
- School of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Ruohan Sun
- School of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
| | - Yongtao Yu
- School of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
- Ningxia Key Laboratory of Ruminant Molecular and Cellular Breeding, School of Animal Science and Technology, Ningxia University, Yinchuan 750021, China
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Su B, Wang X, Dunham RA. The Application of Genetic and Genomic Biotechnology in Aquaculture. BIOLOGY 2023; 12:biology12010127. [PMID: 36671819 PMCID: PMC9855404 DOI: 10.3390/biology12010127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 01/12/2023] [Indexed: 01/15/2023]
Abstract
This Special Issue, "The Application of Genetic and Genomic Biotechnology in Aquaculture," collates 14 published manuscripts covering different aspects of implementing advanced molecular genetics and genomic science in aquaculture [...].
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Affiliation(s)
- Baofeng Su
- Alabama Agricultural Experiment Station, Auburn, AL 36849, USA
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL 36849, USA
- Correspondence:
| | - Xu Wang
- Alabama Agricultural Experiment Station, Auburn, AL 36849, USA
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA
| | - Rex A. Dunham
- Alabama Agricultural Experiment Station, Auburn, AL 36849, USA
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL 36849, USA
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Liu B, Wen H, Yang J, Li X, Li G, Zhang J, Wu S, Butts IAE, He F. Hypoxia Affects HIF-1/LDH-A Signaling Pathway by Methylation Modification and Transcriptional Regulation in Japanese Flounder (Paralichthys olivaceus). BIOLOGY 2022; 11:biology11081233. [PMID: 36009861 PMCID: PMC9405012 DOI: 10.3390/biology11081233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/02/2022] [Accepted: 07/04/2022] [Indexed: 11/20/2022]
Abstract
Simple Summary With global climate change and increased aquaculture production, fishes in natural waters or aquaculture systems are easily subjected to hypoxic stress. However, our understanding about their responsive mechanisms to hypoxia is still limited. Japanese flounder (Paralichthys olivaceus) is a widely cultivated marine economical flatfish, whose hypoxic responsive mechanisms are not fully researched. In this study, responses to hypoxia were investigated at blood physiological, biochemical, hormonal, and molecular levels. Responsive mechanisms of the HIF-1/LDH-A signaling pathway in epigenetic modification and transcriptional regulation were also researched. These results are important for enriching the theory of environmental responsive mechanisms and guiding aquaculture. Abstract Japanese flounder (Paralichthys olivaceus) responsive mechanisms to hypoxia are still not fully understood. Therefore, we performed an acute hypoxic treatment (dissolved oxygen at 2.07 ± 0.08 mg/L) on Japanese flounder. It was confirmed that the hypoxic stress affected the physiological phenotype through changes in blood physiology (RBC, HGB, WBC), biochemistry (LDH, ALP, ALT, GLU, TC, TG, ALB), and hormone (cortisol) indicators. Hypoxia inducible factor-1 (HIF-1), an essential oxygen homeostasis mediator in organisms consisting of an inducible HIF-1α and a constitutive HIF-1β, and its target gene LDH-A were deeply studied. Results showed that HIF-1α and LDH-A genes were co-expressed and significantly affected by hypoxic stress. The dual-luciferase reporter assay confirmed that transcription factor HIF-1 transcriptionally regulated the LDH-A gene, and its transcription binding sequence was GGACGTGA located at −2343~−2336. The DNA methylation status of HIF-1α and LDH-A genes were detected to understand the mechanism of environmental stress on genes. It was found that hypoxia affected the HIF-1α gene and LDH-A gene methylation levels. The study uncovered HIF-1/LDH-A signaling pathway responsive mechanisms of Japanese flounder to hypoxia in epigenetic modification and transcriptional regulation. Our study is significant to further the understanding of environmental responsive mechanisms as well as providing a reference for aquaculture.
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Affiliation(s)
- Binghua Liu
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266000, China
| | - Haishen Wen
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266000, China
| | - Jun Yang
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266000, China
| | - Xiaohui Li
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266000, China
| | - Guangling Li
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266000, China
| | - Jingru Zhang
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266000, China
| | - Shuxian Wu
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266000, China
| | - Ian AE Butts
- School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, AL 36849, USA
| | - Feng He
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266000, China
- Correspondence:
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