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Qin Q, Liu R, Li Z, Liu M, Wu X, Wang H, Yang S, Sun X, Yi X. Resolving candidate genes of duck ovarian tissue transplantation via RNA-Seq and expression network analyses. Poult Sci 2024; 103:103788. [PMID: 38692177 PMCID: PMC11070914 DOI: 10.1016/j.psj.2024.103788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 05/03/2024] Open
Abstract
This study aims to identify candidate genes related to ovarian development after ovarian tissue transplantation through transcriptome sequencing (RNA-seq) and expression network analyses, as well as to provide a reference for determining the molecular mechanism of improving ovarian development following ovarian tissue transplantation. We collected ovarian tissues from 15 thirty-day-old ducks and split each ovary into 4 equal portions of comparable sizes before orthotopically transplanting them into 2-day-old ducks. Samples were collected on days 0 (untransplanted), 3, 6, and 9. The samples were paraffin sectioned and then subjected to Hematoxylin-Eosin (HE) staining and follicular counting. We extracted RNA from ovarian samples via the Trizol method to construct a transcriptome library, which was then sequenced by the Illumina Novaseq 6000 sequencing platform. The sequencing results were examined for differentially expressed genes (DEG) through gene ontology (GO) function and the Kyoto encyclopedia of genes and genomes (KEGG) pathway analyses, gene set enrichment analysis (GSEA), weighted correlation network analysis (WGCNA), and protein-protein interaction (PPI) networks. Some of the candidate genes were selected for verification using real-time fluorescence quantitative PCR (qRT-PCR). Histological analysis revealed a significant reduction in the number of morphologically normal follicles at 3, 6, and 9 d after ovarian transplantation, along with significantly higher abnormality rates (P < 0.05). The transcriptome analysis results revealed 2,114, 2,224, and 2,257 upregulated DEGs and 2,647, 2,883, and 2,665 downregulated DEGs at 3, 6, and 9 d after ovarian transplantation, respectively. Enrichment analysis revealed the involvement multiple pathways in inflammatory signaling, signal transduction, and cellular processes. Furthermore, WGCNA yielded 13 modules, with 10, 4, and 6 candidate genes mined at 3, 6 and 9 d after ovarian transplantation, respectively. Transcription factor (TF) prediction showed that STAT1 was the most important TF. Finally, the qRT-PCR verification results revealed that 12 candidate genes exhibited an expression trend consistent with sequencing data. In summary, significant differences were observed in the number of follicles in duck ovaries following ovarian transplantation. Candidate genes involved in ovarian vascular remodeling and proliferation were screened using RNA-Seq and WGCNA.
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Affiliation(s)
- Qingming Qin
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China
| | - Rongxu Liu
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China
| | - Zhili Li
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China
| | - Midi Liu
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China
| | - Xian Wu
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China
| | - Huimin Wang
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China
| | - Shuailiang Yang
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China
| | - Xuyang Sun
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China
| | - Xianguo Yi
- College of Animal Science and Technology, Xinyang Agriculture and Forestry University, Xinyang, Henan Province, 464000, P. R. China.
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Mohd KI, Saleem R, Choudhary OP, Singh I. Posthatch developmental changes in the ovary with emphasis on follicular development and atresia in the native chicken (Uttara fowl) of Uttarakhand, India. Anat Histol Embryol 2024; 53:e12977. [PMID: 37740677 DOI: 10.1111/ahe.12977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 09/25/2023]
Abstract
This experiment was designed to investigate the postnatal development of the ovary in the Uttara fowl chicken and was conducted on 54 apparently healthy female birds divided into different age groups, namely Day 1 and Weeks 1, 4, 8, 12, 16, 20, 24, 28 with six birds each. During postnatal development, the left ovary gradually increased in size and complexity. The segmentation of the ovary started by 4 weeks, follicular eruption by 8 weeks, small liquor follicles (1-5 mm) appeared by 16 weeks, pre-hierarchical follicles by 20 weeks and hierarchical follicles by 24 weeks of age. The cortex was distinctly differentiated from the medulla in the early stage of ovarian development. However, the division between cortex and medulla was gradually obscured with age (transitional stage) and distinction was completely lost in the mature ovary. The different stages of follicular development in the chicken ovary were classified as primordial, primary, growing at Stage I, II and III stromal follicles besides pre-hierarchical and hierarchical surface follicles. The primordial and primary follicles showed cytoplasmic sudanophilic substances, especially in the Balbiani's yolk body, indicating the presence of lipids (Sudan Black B) with no activity for neutral polysaccharides (periodic acid Schiff method). It was observed that apoptotic changes may affect any stage of developing follicle resulting in arrested growth and atrophy. An early form of follicular atresia was the fate of the growth-arrested primordial and primary follicles, whereas the glandular form of atresia was commonly observed in growing follicles arrested at Stages I and II. The scanning electron micrographs unveiled the follicles as hollow oval structures with a follicular lumen lined by the perivitelline membrane (glycoprotein membrane) having lacunae giving a honeycomb-like appearance.
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Affiliation(s)
- Khan Idrees Mohd
- Department of Veterinary Anatomy, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture Sciences and Technology, Pantnagar, Uttarakhand, India
| | - Rabab Saleem
- Department of Veterinary Anatomy, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture Sciences and Technology, Pantnagar, Uttarakhand, India
| | - Om Prakash Choudhary
- Department of Veterinary Anatomy, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture Sciences and Technology, Pantnagar, Uttarakhand, India
- Department of Veterinary Anatomy, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Punjab, Bathinda, India
| | - Ishwar Singh
- Department of Veterinary Anatomy, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture Sciences and Technology, Pantnagar, Uttarakhand, India
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Sun C, Wu H, Xiao H, Nguepi Tsopmejio IS, Jin Z, Song H. Effect of dietary Flammulina velutipes (Curt.: Fr.) stem waste on ovarian follicles development in laying hens. Italian Journal of Animal Science 2023. [DOI: 10.1080/1828051x.2023.2178341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Affiliation(s)
- Chang Sun
- School of Life Science, Jilin Agricultural University, Jilin, P. R. China
| | - Haoyuan Wu
- School of Life Science, Jilin Agricultural University, Jilin, P. R. China
| | - Huanwei Xiao
- School of Life Science, Jilin Agricultural University, Jilin, P. R. China
| | | | - Zhouyu Jin
- School of Life Science, Jilin Agricultural University, Jilin, P. R. China
| | - Hui Song
- School of Life Science, Jilin Agricultural University, Jilin, P. R. China
- Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Changchun, P. R. China
- Engineering Research Center of Chinese Ministry of Education for Edible and Medicinal Fungi, Changchun, P. R. China
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Kui H, Li P, Wang T, Luo Y, Ning C, Li M, Liu S, Zhu Q, Li J, Li D. Dynamic mRNA expression during chicken ovarian follicle development. G3 (Bethesda) 2023; 14:jkad237. [PMID: 37832513 PMCID: PMC10755205 DOI: 10.1093/g3journal/jkad237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 07/24/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023]
Abstract
Ovarian follicle development is a complex and well-orchestrated biological process of great economic significance for poultry production. Specifically, understanding the molecular mechanisms underlying follicular development is essential for high-efficiency follicular development can benefit the entire industry. In addition, domestic egg-laying hens often spontaneously develop ovarian cancer, providing an opportunity to study the genetic, biochemical, and environmental risk factors associated with the development of this cancer. Here, we provide high-quality RNA sequencing data for chicken follicular granulosa cells across 10 developmental stages, which resulted in a total of 204.57 Gb of clean sequencing data (6.82 Gb on average per sample). We also performed gene expression, time-series, and functional enrichment analyses across the 10 developmental stages. Our study revealed that SWF (small while follicle), F1 (F1 hierarchical follicles), and POFs (postovulatory follicles) best represent the transcriptional changes associated with the prehierarchical, preovulatory, and postovulatory stages, respectively. We found that the preovulatory stage F1 showed the greatest divergence in gene expression from the POF stage. Our research lays a foundation for further elucidation of egg-laying performance of chicken and human ovarian disease.
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Affiliation(s)
- Hua Kui
- School of Pharmacy, Chengdu University, Chengdu 610106, People’s Republic of China
- Jinxin Research Institute for Reproductive Medicine and Genetics, Chengdu Xi Nan Gynecological Hospital Co., Ltd., 66 Bisheng Road, Chengdu 610000, People’s Republic of China
| | - Penghao Li
- Jinxin Research Institute for Reproductive Medicine and Genetics, Chengdu Xi Nan Gynecological Hospital Co., Ltd., 66 Bisheng Road, Chengdu 610000, People’s Republic of China
| | - Tao Wang
- School of Pharmacy, Chengdu University, Chengdu 610106, People’s Republic of China
| | - Yingyu Luo
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, Sichuan, People’s Republic of China
| | - Chunyou Ning
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, Sichuan, People’s Republic of China
| | - Mengmeng Li
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, Sichuan, People’s Republic of China
| | - Siying Liu
- School of Pharmacy, Chengdu University, Chengdu 610106, People’s Republic of China
| | - Qing Zhu
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, Sichuan, People’s Republic of China
| | - Jing Li
- College of Agriculture, Kunming University, Kunming 650214, People’s Republic of China
| | - Diyan Li
- School of Pharmacy, Chengdu University, Chengdu 610106, People’s Republic of China
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Chen C, Jiang X, Ding C, Sun X, Wan L, Wang C. Downregulated lncRNA HOTAIR ameliorates polycystic ovaries syndrome via IGF-1 mediated PI3K/Akt pathway. Gynecol Endocrinol 2023; 39:2227280. [PMID: 37356454 DOI: 10.1080/09513590.2023.2227280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 05/29/2023] [Accepted: 06/13/2023] [Indexed: 06/27/2023] Open
Abstract
OBJECTIVE Polycystic ovarian syndrome (PCOS) is a common disorder that leads to infertility in reproductive-aged females. HOTAIR is highly expressed in various gynecological diseases and is associated with a poor prognosis. We aimed to explore the role of HOTAIR in PCOS. METHODS First, PCOS rats were induced using dehydroepiandrosterone and then treated with si-HOTAIR. Next, HOTAIR mRNA expression and serum hormone levels were detected. HE staining was applied to observe estrus cycle, ovarian morphology and count the number of follicles. Apoptosis in the ovary was detected by TUNEL. Thereafter, ovarian granulosa cells (GCs) were isolated from PCOS rats, transfected with si-HOTAIR and treated with LY294002 (Akt inhibitor) or IGF-1. CCK-8 and flow cytometry assays were used to evaluate cell viability and apoptosis. IGF-1, apoptosis- and PI3K/Akt pathway-associated protein expressions in ovary and GCs were also detected. RESULTS In in vivo experiments, si-HOTAIR decreased serum T, E2 and LH levels but increased FSH level, restored estrus cycle, ovarian morphology and inhibited apoptosis of ovary in PCOS rats. Meanwhile, in vitro assays showed that si-HOTAIR upregulated the viability but inhibited the apoptosis of PCOS GCs. Furthermore, both in vivo and in vitro assays revealed that si-HOTAIR increased Bcl-2 expression but suppressed Bax, Bad, IGF-1 expressions and PI3K, AKT phosphorylation. However, the aforementioned effects of si-HOTAIR in vitro were further enhanced by LY294002 and partially reversed by IGF-1. CONCLUSIONS HOTAIR knockdown improved PCOS, and the mechanism may relate to IGF-1-mediated PI3K/Akt pathway, indicating HOTAIR may be a novel therapeutic target for PCOS.
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Affiliation(s)
- Chunyue Chen
- Department of Reproductive Medicine, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, China
| | - Xuejuan Jiang
- Department of Reproductive Medicine, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, China
| | - Caifei Ding
- Department of Reproductive Medicine, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, China
| | - Xin Sun
- Department of Reproductive Medicine, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, China
| | - Lingyi Wan
- Department of Reproductive Medicine, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, China
| | - Chenye Wang
- Department of Reproductive Medicine, Zhejiang Chinese Medicine and Western Medicine Integrated Hospital, Hangzhou, China
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Zhong C, Liu Z, Li D, Kang L, Jiang Y. Long-read sequencing reveals the effect of follicle-stimulating hormone on the mRNA profile of chicken granulosa cells from prehierarchical follicles. Poult Sci 2023; 102:102600. [PMID: 36913754 PMCID: PMC10023945 DOI: 10.1016/j.psj.2023.102600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 02/11/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023] Open
Abstract
Follicle selection is an important step in the laying process of chicken, which is closely related to the laying performance and fecundity of hens. Follicle selection mainly depends on the regulation of follicle-stimulating hormone (FSH) secreted by pituitary gland and the expression of follicle stimulation hormone receptor. To uncover the role of FSH in chicken follicle selection, in this study, we analyzed the changes in the mRNA transcriptome profiles of FSH-treated chicken granulosa cells from prehierarchical follicles by long-read sequencing Oxford Nanopore Technologies (ONT) approach. Among the 10,764 genes detected, 31 differentially expressed (DE) transcripts of 28 DE genes were significantly upregulated by FSH treatment. These DE transcripts (DETs) were mainly related to the steroid biosynthetic process by GO analysis and enriched in pathways of ovarian steroidogenesis and aldosterone synthesis and secretion by KEGG analysis. Among these genes, the mRNA and protein expression of TNF receptor associated factor 7 (TRAF7) was upregulated after FSH treatment. Further study revealed that TRAF7 stimulated the mRNA expression of steroidogenic enzymes steroidogenic acute regulatory protein (StAR) and cytochrome P450 family 11 subfamily A member 1 (CYP11A1) genes and the proliferation of granulosa cells. This is the first study to investigate differences in chicken prehierarchical follicular granulosa cells before and after FSH treatment by using ONT transcriptome sequencing, which provides a reference for a more comprehensive understanding of the molecular mechanism of follicle selection in chicken.
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Affiliation(s)
- Conghao Zhong
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China; College of Animal Science and Technology, China Agricultural University, Beijing 100194, China
| | - Zhansheng Liu
- Deparment of Animal Gerplasm Resources, Shandong General Station of Animal Husbandry, Jinan 250000, China
| | - Dandan Li
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Li Kang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China
| | - Yunliang Jiang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China.
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Rengaraj D, Han JY. Female Germ Cell Development in Chickens and Humans: The Chicken Oocyte Enriched Genes Convergent and Divergent with the Human Oocyte. Int J Mol Sci 2022; 23:11412. [PMID: 36232712 PMCID: PMC9570461 DOI: 10.3390/ijms231911412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/17/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
The development of germ cells and other physiological events in the differentiated ovary of humans are highly conserved with several mammalian species, except for the differences in timing. However, comparative knowledge on this topic is very scarce with respect to humans and lower vertebrates, such as chickens. In chickens, female germ cells enter into meiosis around embryonic day (E) 15.5 and are arrested in meiotic prophase I as primary oocytes. The oocytes arrested in meiosis I are accumulated in germ-cell cysts; shortly after hatching, they are enclosed by flattened granulosa cells in order to form primordial follicles. In humans, the process of meiotic recombination in female germ cells begins in the 10–11th week of gestation, and primordial follicles are formed at around week 20. In this review, we comprehensively elucidate both the conservation and the species-specific differences between chickens and humans with respect to germ cell, oocyte, and follicle development. Importantly, we provide functional insights into a set of chicken oocyte enriched genes (from E16 to 1 week post-hatch) that show convergent and divergent expression patterns with respect to the human oocyte (from week 11 to 26).
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Mfoundou JDL, Guo Y, Yan Z, Wang X. Morpho-Histology and Morphometry of Chicken Testes and Seminiferous Tubules among Yellow-Feathered Broilers of Different Ages. Vet Sci 2022; 9:vetsci9090485. [PMID: 36136701 PMCID: PMC9504805 DOI: 10.3390/vetsci9090485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/31/2022] [Accepted: 09/03/2022] [Indexed: 12/03/2022] Open
Abstract
Simple Summary Testes are important male reproductive organs that in chickens have been greatly investigated, from pre-hatch to after sexual maturity. The present study investigated the changes in components that occur during growth, and evaluated morphometry of the seminiferous tubules (ST), as well as gonadosomatic index (GSI) in Gallus domesticus at different age stages. The left and right testes were harvested from 70 chickens, then fixed in alcoholic acetate formalin (AAF) fixative solution, and hematoxylin- and eosin-stained tissues were used for microscopic observations. The results revealed that the left testis (LT) and the right testis (RT) exhibited fuzzy ST features, with apoptotic resorption of many tubules observed in both testes of 1-wk-old chicks only. ST formation was completed at 1 month, with an increase of all morphometric parameters in both testes until sexual maturity (3-mo-old): the age at which we recorded the greatest GSI. This study provides details on ST apoptotic resorption, which is a process not yet reported in existing publications, as well as ST morphometry and GSI, from a juvenile stage of growth towards sexual maturity. This can serve as reference material and also as a data update to better understand the morpho-histological changes that occur in chicken testes during growth. Abstract Unlike in many mammals, poultry testes are found in the abdominal cavity where they develop and perform spermatogenesis at high body temperature. Scarce reports among current publications detail the growth of testes and ST morphometry among juvenile chicks. Therefore, this study aims to investigate changes in components occurring in Gallus domesticus testes, by assessing the GSI and morphologically and histologically evaluating the testes and ST morphometry from 1-wk- to 4-mo-old. Right and left testes were collected from 70 healthy chickens divided into seven age-related groups (n = 10) and then immersed into the alcoholic acetate formalin (AAF) fixative solution. Hematoxylin- and eosin-stained tissues were used for microscopic observations. The findings revealed that both testes exhibited smooth features from 1-wk-old to 1-mo-old, and thereafter showed a consistent increase in vascularization until 4-mo-old. Histologically, both testes exhibited unclear ST, with ST apoptotic resorption observed in the 1-wk-old chicks. Until 1-mo-old, ST formed and few spermatogonia differentiated into primary spermatocytes, with all spermatogenic cells observed at 3-mo-old, i.e., sexual maturity. These findings suggest that both testes develop in analogy, and their sizes including increases in length and diameter are related to the spermatogenic activity in the ST. Subsequently, ST resorption by apoptosis is assumed to participate in the physiological mechanism regulating germ cells (GC). Finally, the GSI tended to increase with growth.
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Affiliation(s)
| | - Yajun Guo
- College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Zunqiang Yan
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Xinrong Wang
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- Correspondence: ; Tel.: +86-182-9310-5688
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Ahmadi S, Ohkubo T. Leptin Promotes Primordial Follicle Activation by Regulating Ovarian Insulin-like Growth Factor System in Chicken. Endocrinology 2022; 163:6650339. [PMID: 35882602 DOI: 10.1210/endocr/bqac112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Indexed: 11/19/2022]
Abstract
Leptin and insulin-like growth factor 1 (IGF-1) regulate follicle development and reproduction in vertebrates. This study investigated the role played by leptin and IGF-1 in primordial follicle activation in the ovary of 7-day-old chicks. Different doses of leptin were intraperitoneally administrated to female layer chicks, and further analyses were performed. While leptin administration did not affect hepatic leptin receptor (LEPR), growth hormone receptor (GHR), or IGF-1, the lower dose of leptin significantly increased the messenger RNA (mRNA) expression of IGF-1, IGF-1 receptor, and IGF-binding protein (IGFBP)-2 and attenuated anti-Müllerian hormone (AMH) gene expression in the ovary. Furthermore, the ovaries of the same age chicks were challenged with leptin and/or IGF-1 in vitro. Leptin at a lower dose increased the mRNA expression of IGF-1, LEPR, and leptin; 100 ng/mL leptin and 10 ng/mL IGF-1 alone or combined with leptin reduced IGFBP-2 mRNA expression. AMH gene expression was also reduced by all doses except 10 ng/mL leptin. Histological studies showed that a lower dose of leptin injection induced the primordial follicle growth in the ovary in vivo, and the number of primordial follicles was higher in all leptin treatments over control in vitro. Moreover, the luciferase assay revealed that leptin enhanced IGF-1 promoter activity in LEPR-expressing CHO-K1 cells. Collectively, these results indicate that leptin directly affects the IGF-1/IGFBP system and promotes primordial follicular growth in the ovary of early posthatch chicks. In addition, the follicular development by leptin-induced IGF-1 is, at least in part, caused by the suppression of AMH in the ovary.
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Affiliation(s)
- Sadequllah Ahmadi
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
- College of Agriculture, Ibaraki University, Ibaraki, Japan
| | - Takeshi Ohkubo
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Japan
- College of Agriculture, Ibaraki University, Ibaraki, Japan
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Hlokoe VR, Tyasi TL, Gunya B. Chicken ovarian follicles morphology and growth differentiation factor 9 gene expression in chicken ovarian follicles: review. Heliyon 2022; 8:e08742. [PMID: 35059524 PMCID: PMC8760543 DOI: 10.1016/j.heliyon.2022.e08742] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 11/05/2021] [Accepted: 01/07/2022] [Indexed: 12/23/2022] Open
Abstract
Ovary follicular development is a progressive system from the beginning of small cortical follicles to the ovulation of hierarchical follicles. The review was conducted to provide information on the indigenous chickens commonly used for egg production, chicken ovarian follicles morphology and expression of growth differentiation factor 9 (GDF9) gene in ovarian follicles and its relationship with egg production. The research databases used in the study include google scholar, Science Direct, PubMed, JSTOR and Cambridge Core. Google, Yahoo and Baidu search engines were used to search the information. In this study, the papers selected for use were original research articles and reviews to ensure that the information used was from research results. Besides, only recent English papers, 2010-2021, were used. The keywords used to search for articles were chicken ovarian follicles, ovarian morphology and GDF9 gene expression. The documents showed that pre-hierarchical follicles include many small and large white follicles, which are about 2-5mm in diameter and 5 to 6 small yellow follicles (SYF) that are about 5-10mm in diameter. Preovulatory follicles are about five to six in number and above 10mm in diameter, with the sizes from F6 to F1, with F1 as the largest follicle. Further, the studies revealed that GDF9 gene mRNA is expressed in the highest concentration in small yellow follicles and other studies reported that the expression of GDF9 gene has been found in follicles of the primary to preovulatory stages in chickens. This review concludes that the GDF9 gene expression is mainly throughout follicular growth and it stimulates the proliferation of pre-hierarchical granulosa cells. The increased egg production in chickens depends on progressive developmental stages and the growth of ovarian follicles.
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Affiliation(s)
- V R Hlokoe
- Department of Agricultural Economics and Animal Production, University of Limpopo, Private Bag X1106, Sovenga, 0727, Limpopo, South Africa
| | - T L Tyasi
- Department of Agricultural Economics and Animal Production, University of Limpopo, Private Bag X1106, Sovenga, 0727, Limpopo, South Africa
| | - B Gunya
- Department of Agricultural Economics and Animal Production, University of Limpopo, Private Bag X1106, Sovenga, 0727, Limpopo, South Africa
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