1
|
Chao CF, Pesch YY, Yu H, Wang C, Aristizabal MJ, Huan T, Tanentzapf G, Rideout E. An important role for triglyceride in regulating spermatogenesis. eLife 2024; 12:RP87523. [PMID: 38805376 PMCID: PMC11132686 DOI: 10.7554/elife.87523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024] Open
Abstract
Drosophila is a powerful model to study how lipids affect spermatogenesis. Yet, the contribution of neutral lipids, a major lipid group which resides in organelles called lipid droplets (LD), to sperm development is largely unknown. Emerging evidence suggests LD are present in the testis and that loss of neutral lipid- and LD-associated genes causes subfertility; however, key regulators of testis neutral lipids and LD remain unclear. Here, we show LD are present in early-stage somatic and germline cells within the Drosophila testis. We identified a role for triglyceride lipase brummer (bmm) in regulating testis LD, and found that whole-body loss of bmm leads to defects in sperm development. Importantly, these represent cell-autonomous roles for bmm in regulating testis LD and spermatogenesis. Because lipidomic analysis of bmm mutants revealed excess triglyceride accumulation, and spermatogenic defects in bmm mutants were rescued by genetically blocking triglyceride synthesis, our data suggest that bmm-mediated regulation of triglyceride influences sperm development. This identifies triglyceride as an important neutral lipid that contributes to Drosophila sperm development, and reveals a key role for bmm in regulating testis triglyceride levels during spermatogenesis.
Collapse
Affiliation(s)
- Charlotte F Chao
- Department of Cellular and Physiological Sciences, Life Sciences Institute, The University of British ColumbiaVancouverCanada
| | - Yanina-Yasmin Pesch
- Department of Cellular and Physiological Sciences, Life Sciences Institute, The University of British ColumbiaVancouverCanada
| | - Huaxu Yu
- Department of Chemistry, The University of British ColumbiaVancouverCanada
| | - Chenjingyi Wang
- Department of Chemistry, The University of British ColumbiaVancouverCanada
| | | | - Tao Huan
- Department of Chemistry, The University of British ColumbiaVancouverCanada
| | - Guy Tanentzapf
- Department of Cellular and Physiological Sciences, Life Sciences Institute, The University of British ColumbiaVancouverCanada
| | - Elizabeth Rideout
- Department of Cellular and Physiological Sciences, Life Sciences Institute, The University of British ColumbiaVancouverCanada
| |
Collapse
|
2
|
Tao HP, Lu TF, Li S, Jia GX, Zhang XN, Yang QE, Hou YP. Pancreatic lipase-related protein 2 is selectively expressed by peritubular myoid cells in the murine testis and sustains long-term spermatogenesis. Cell Mol Life Sci 2023; 80:217. [PMID: 37468762 PMCID: PMC11072130 DOI: 10.1007/s00018-023-04872-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/21/2023] [Accepted: 07/11/2023] [Indexed: 07/21/2023]
Abstract
Spermatogenesis is a complicated process of germ cell differentiation that occurs within the seminiferous tubule in the testis. Peritubular myoid cells (PTMCs) produce major components of the basement membrane that separates and ensures the structural integrity of seminiferous tubules. These cells secrete niche factors to promote spermatogonial stem cell (SSC) maintenance and mediate androgen signals to direct spermatid development. However, the regulatory mechanisms underlying the identity and function of PTMCs have not been fully elucidated. In the present study, we showed that the expression of pancreatic lipase-related protein 2 (Pnliprp2) was restricted in PTMCs in the testis and that its genetic ablation caused age-dependent defects in spermatogenesis. The fertility of Pnliprp2 knockout animals (Pnliprp2-/-) was normal at a young age but declined sharply beginning at 9 months. Pnliprp2 deletion impaired the homeostasis of undifferentiated spermatogonia and severely disrupted the development and function of spermatids. Integrated analyses of single-cell RNA-seq and metabolomics data revealed that glyceride metabolism was changed in PTMCs from Pnliprp2-/- mice. Further analysis found that 60 metabolites were altered in the sperm of the Pnliprp2-/- animals; notably, lipid metabolism was significantly dysregulated. Collectively, these results revealed that Pnliprp2 was exclusively expressed in PTMCs in the testis and played a novel role in supporting continual spermatogenesis in mice. The outcomes of these findings highlight the function of lipid metabolism in reproduction and provide new insights into the regulation of PTMCs in mammals.
Collapse
Affiliation(s)
- Hai-Ping Tao
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Qinghai Key Laboratory of Animal Ecological Genomics, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, Qinghai, China
| | - Teng-Fei Lu
- State Key Laboratory of Farm Animal Biotechnology Breeding, College of Biological Sciences, China Agricultural University, Beijing, 100193, China
| | - Shuang Li
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Qinghai Key Laboratory of Animal Ecological Genomics, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, Qinghai, China
| | - Gong-Xue Jia
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Qinghai Key Laboratory of Animal Ecological Genomics, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, Qinghai, China
| | - Xiao-Na Zhang
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Qinghai Key Laboratory of Animal Ecological Genomics, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, Qinghai, China
| | - Qi-En Yang
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, Qinghai, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
- Qinghai Key Laboratory of Animal Ecological Genomics, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, Qinghai, China.
| | - Yun-Peng Hou
- State Key Laboratory of Farm Animal Biotechnology Breeding, College of Biological Sciences, China Agricultural University, Beijing, 100193, China.
| |
Collapse
|
3
|
Yuksel S, Aredo B, Zegeye Y, Zhao CX, Tang M, Li X, Hulleman JD, Gautron L, Ludwig S, Moresco EMY, Butovich IA, Beutler BA, Ufret-Vincenty RL. Forward genetic screening using fundus spot scale identifies an essential role for Lipe in murine retinal homeostasis. Commun Biol 2023; 6:533. [PMID: 37198396 DOI: 10.1038/s42003-023-04870-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 04/24/2023] [Indexed: 05/19/2023] Open
Abstract
Microglia play a role in the pathogenesis of many retinal diseases. Fundus spots in mice often correlate with the accumulation of activated subretinal microglia. Here we use a semiquantitative fundus spot scoring scale in combination with an unbiased, state-of-the-science forward genetics pipeline to identify causative associations between chemically induced mutations and fundus spot phenotypes. Among several associations, we focus on a missense mutation in Lipe linked to an increase in yellow fundus spots in C57BL/6J mice. Lipe-/- mice generated using CRISPR-Cas9 technology are found to develop accumulation of subretinal microglia, a retinal degeneration with decreased visual function, and an abnormal retinal lipid profile. We establish an indispensable role of Lipe in retinal/RPE lipid homeostasis and retinal health. Further studies using this new model will be aimed at determining how lipid dysregulation results in the activation of subretinal microglia and whether these microglia also play a role in the subsequent retinal degeneration.
Collapse
Affiliation(s)
- Seher Yuksel
- Department of Ophthalmology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Bogale Aredo
- Department of Ophthalmology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Yeshumenesh Zegeye
- Department of Ophthalmology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Cynthia X Zhao
- Department of Ophthalmology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Miao Tang
- Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Xiaohong Li
- Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - John D Hulleman
- Department of Ophthalmology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Laurent Gautron
- Center for Hypothalamic Research and Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Sara Ludwig
- Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Eva M Y Moresco
- Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Igor A Butovich
- Department of Ophthalmology, UT Southwestern Medical Center, Dallas, TX, USA.
| | - Bruce A Beutler
- Center for the Genetics of Host Defense, University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | | |
Collapse
|
4
|
Cloning and Molecular Characterization of HSL and Its Expression Pattern in HPG Axis and Testis during Different Stages in Bactrian Camel. Curr Issues Mol Biol 2022; 44:3779-3791. [PMID: 36005155 PMCID: PMC9406428 DOI: 10.3390/cimb44080259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/17/2022] [Accepted: 08/19/2022] [Indexed: 11/18/2022] Open
Abstract
Hormone-sensitive lipase (HSL) is a key enzyme in animal fat metabolism and is involved in the rate-limiting step of catalyzing the decomposition of fat and cholesterol. It also plays an important regulatory role in maintaining seminiferous epithelial structure, androgen synthesis and primordial germ cell differentiation. We previously reported that HSL is involved the synthesis of steroids in Bactrian camels, although it is unclear what role it plays in testicular development. The present study was conducted to characterize the biological function and expression pattern of the HSL gene in the hypothalamic pituitary gonadal (HPG) axis and the development of testis in Bactrian camels. We analyzed cloning of the cDNA sequence of the HSL gene of Bactrian camels by RT-PCR, as well as the structural features of HSL proteins, using bioinformatics software, such as ProtParam, TMHMM, Signal P 4.1, SOPMA and MEGA 7.0. We used qRT-PCR, Western blotting and immunofluorescence staining to clarify the expression pattern of HSL in the HPG axis and testis of two-week-old (2W), two-year-old (2Y), four-year-old (4Y) and six-year-old (6Y) Bactrian camels. According to sequence analysis, the coding sequence (CDS) region of the HSL gene is 648 bp in length and encodes 204 amino acids. According to bioinformatics analysis, the nucleotide and amino acid sequence of Bactrian camel HSL are most similar to those of Camelus pacos and Camelusdromedarius, with the lowest sequence similarity with Mus musculus. In adult Bactrian camel HPG axis tissues, both HSL mRNA and protein expression were significantly higher in the testis than in other tissues (hypothalamus, pituitary and pineal tissues) (p < 0.05). The expression of mRNA in the testis increased with age and was the highest in six-year-old testis (p < 0.01). The protein expression levels of HSL in 2Y and 6Y testis were clearly higher than in 2W and 4Y testis tissues (p < 0.01). Immunofluorescence results indicate that the HSL protein was mainly localized in the germ cells, Sertoli cells and Leydig cells from Bactrian camel testis, and strong positive signals were detected in epididymal epithelial cells, basal cells, spermatocytes and smooth muscle cells, with partially expression in hypothalamic glial cells, pituitary suspensory cells and pineal cells. According to the results of gene ontology (GO) analysis enrichment, HSL indirectly regulates the anabolism of steroid hormones through interactions with various targets. Therefore, we conclude that the HSL gene may be associated with the development and reproduction of Bactrian camels in different stages of maturity, and these results will contribute to further understanding of the regulatory mechanisms of HSL in Bactrian camel reproduction.
Collapse
|
5
|
A novel SNP within LIPE gene is highly associated with sheep intramuscular fat content. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
6
|
Grabner GF, Xie H, Schweiger M, Zechner R. Lipolysis: cellular mechanisms for lipid mobilization from fat stores. Nat Metab 2021; 3:1445-1465. [PMID: 34799702 DOI: 10.1038/s42255-021-00493-6] [Citation(s) in RCA: 215] [Impact Index Per Article: 71.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/15/2021] [Indexed: 12/13/2022]
Abstract
The perception that intracellular lipolysis is a straightforward process that releases fatty acids from fat stores in adipose tissue to generate energy has experienced major revisions over the last two decades. The discovery of new lipolytic enzymes and coregulators, the demonstration that lipophagy and lysosomal lipolysis contribute to the degradation of cellular lipid stores and the characterization of numerous factors and signalling pathways that regulate lipid hydrolysis on transcriptional and post-transcriptional levels have revolutionized our understanding of lipolysis. In this review, we focus on the mechanisms that facilitate intracellular fatty-acid mobilization, drawing on canonical and noncanonical enzymatic pathways. We summarize how intracellular lipolysis affects lipid-mediated signalling, metabolic regulation and energy homeostasis in multiple organs. Finally, we examine how these processes affect pathogenesis and how lipolysis may be targeted to potentially prevent or treat various diseases.
Collapse
Affiliation(s)
- Gernot F Grabner
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Hao Xie
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Martina Schweiger
- Institute of Molecular Biosciences, University of Graz, Graz, Austria.
- BioTechMed-Graz, Graz, Austria.
| | - Rudolf Zechner
- Institute of Molecular Biosciences, University of Graz, Graz, Austria.
- BioTechMed-Graz, Graz, Austria.
| |
Collapse
|
7
|
Ferreira CER, Campos GS, Schmidt PI, Sollero BP, Goularte KL, Corcini CD, Gasperin BG, Lucia T, Boligon AA, Cardoso FF. Genome-wide association and genomic prediction for scrotal circumference in Hereford and Braford bulls. Theriogenology 2021; 172:268-280. [PMID: 34303226 DOI: 10.1016/j.theriogenology.2021.07.007] [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: 08/14/2020] [Revised: 07/12/2021] [Accepted: 07/14/2021] [Indexed: 11/19/2022]
Abstract
Scrotal circumference (SC) is widely used as a selection criterion for bulls in breeding programs, since it is easily assessed and correlated with several desirable reproductive traits. The objectives of this study were: to perform a genome-wide association study (GWAS) to identify genomic regions associated with SC adjusted for age (SCa) and for both age and weight (SCaw); to select Tag SNPs from GWAS to construct low-density panel for genomic prediction; and to compare the prediction accuracy of the SC through different methods for Braford and Hereford bulls from the same genetic breeding program. Data of SC from 18,172 bulls (30.4 ± 3.7 cm) and of genotypes from 131 sires and 3,545 animals were used. From GWAS, the top 1% of 1-Mb windows were observed on chromosome (BTA) 2, 20, 7, 8, 15, 3, 16, 27, 6 and 8 for SCa and on BTA 8, 15, 16, 21, 19, 2, 6, 5 and 10 for SCaw, representing 17.4% and 18.8% of the additive genetic variance of SCa and SCaw, respectively. The MeSH analysis was able to translate genomic information providing biological meanings of more specific gene functions related to the SCa and SCaw. The genomic enhancement methods, especially single step GBLUP, that combined phenotype and pedigree data with direct genomic values generated gains in accuracy in relation to pedigree BLUP, suggesting that genomic predictions should be applied to improve genetic gain and to narrow the generation interval compared to traditional methods. The proposed Tag-SNP panels may be useful for lower-cost commercial genomic prediction applications in the future, when the number of bulls in the reference population increases for SC in Hereford and Braford breeds.
Collapse
Affiliation(s)
- Carlos E R Ferreira
- ReproPel, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
| | - Gabriel S Campos
- Departamento de Zootecnia, Faculdade de Agronomia Eliseu Maciel, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Patricia I Schmidt
- Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual de São Paulo, Jaboticabal, SP, Brazil
| | | | - Karina L Goularte
- ReproPel, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Carine D Corcini
- ReproPel, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Bernardo G Gasperin
- ReproPel, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Thomaz Lucia
- ReproPel, Faculdade de Veterinária, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Arione A Boligon
- Departamento de Zootecnia, Faculdade de Agronomia Eliseu Maciel, Universidade Federal de Pelotas, Pelotas, RS, Brazil
| | - Fernando F Cardoso
- Departamento de Zootecnia, Faculdade de Agronomia Eliseu Maciel, Universidade Federal de Pelotas, Pelotas, RS, Brazil; Embrapa Pecuária Sul, Bagé, RS, Brazil
| |
Collapse
|
8
|
Pini T, Haywood M, McCallie B, Lane SL, Schoolcraft WB, Katz-Jaffe M. Liquid chromatography-tandem mass spectrometry reveals an active response to DNA damage in human spermatozoa. F&S SCIENCE 2021; 2:153-163. [PMID: 35559750 DOI: 10.1016/j.xfss.2021.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/23/2021] [Accepted: 03/13/2021] [Indexed: 01/07/2023]
Abstract
OBJECTIVE To investigate how endogenously elevated DNA fragmentation alters the human sperm proteome, and whether this fragmentation contributes to genomic deletions. DESIGN Research study. SETTING Commercial fertility clinic. PATIENT(S) Men with low (0%-4%, n = 7) or high (≥16%, n = 6) sperm DNA fragmentation, as assessed by terminal deoxynucleotidyl transferase dUTP nick end labeling assay. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) Global sperm proteome, single-nucleotide polymorphism genotyping array. RESULT(S) A total of 78 significantly differentially abundant proteins (30 decreased, 48 increased) were observed in control vs. high DNA damage samples. DNA damage resulted in robust proteomic responses, including markers of oxidative stress and apoptosis, DNA damage repair proteins, and transcription/translation and protein turnover machinery. Several key sperm functional proteins were significantly decreased in ejaculates with high DNA damage. We were unable to substantiate a link between increased DNA fragmentation and genomic deletions in human spermatozoa. CONCLUSION(S) Developing human spermatozoa initiate an active transcriptional response to endogenous DNA damage, which manifests as alterations in the sperm proteome.
Collapse
Affiliation(s)
- Taylor Pini
- Colorado Center for Reproductive Medicine, Lone Tree, Colorado.
| | - Mary Haywood
- Colorado Center for Reproductive Medicine, Lone Tree, Colorado
| | - Blair McCallie
- Colorado Center for Reproductive Medicine, Lone Tree, Colorado
| | - Sydney L Lane
- Colorado Center for Reproductive Medicine, Lone Tree, Colorado
| | | | | |
Collapse
|
9
|
Willforss J, Morrell JM, Resjö S, Hallap T, Padrik P, Siino V, de Koning DJ, Andreasson E, Levander F, Humblot P. Stable bull fertility protein markers in seminal plasma. J Proteomics 2021; 236:104135. [PMID: 33540068 DOI: 10.1016/j.jprot.2021.104135] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 01/15/2021] [Accepted: 01/25/2021] [Indexed: 12/19/2022]
Abstract
Bull fertility is an important trait in breeding as the semen of one bull can, potentially, be used to perform thousands of inseminations. The high number of inseminations needed to obtain reliable measures from Non-Return Rates to oestrus creates difficulties in assessing fertility accurately. Improving molecular knowledge of seminal properties may provide ways to facilitate selection of bulls with good semen quality. In this study, liquid chromatography mass spectrometry (LC-MS/MS) was used to analyze the protein content from the seminal plasma of 20 bulls with Non-Return Rates between 35 and 60%, sampled across three seasons. Overall, 1343 proteins were identified and proteins with consistent correlation to fertility across multiple seasons found. From these, nine protein groups had a significant Pearson correlation (p < 0.1) with fertility in all three seasons and 34 protein groups had a similar correlation in at least two seasons. Among notable proteins showing a high and consistent correlation across seasons were Osteopontin, a lipase (LIPA) and N-acetylglucosamine-1phosphotransferase subunit gamma. Three proteins were combined in a multiple linear regression to predict fertility (r = 0.81). These sets of proteins represent potential markers, which could be used by the breeding industry to phenotype bull fertility. SIGNIFICANCE: The ability of bull spermatozoa to fertilize oocytes is crucial for breeding efficiency. However, the reliability of this trait from field measures is relatively low and the prediction of fertility given by conventional methods to evaluate sperm quality is currently not very accurate. In this work, we identify sets of proteins in bull seminal plasma from repeated samples collected at different times of the year that correlate to fertility in a consistent way. We combined these individual proteins to build a molecular signature predictive of fertility. This study provides an overview of proteins linked to fertility in seminal plasma, thereby increasing knowledge of the bull seminal plasma proteome. Protein signatures from the latter, potentially related to fertility, may be of use to predict fertility for individual bulls.
Collapse
Affiliation(s)
- J Willforss
- Department of Immunotechnology, Lund University, Lund, Sweden.
| | - J M Morrell
- Department of Clinical Sciences, Division of Reproduction, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - S Resjö
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - T Hallap
- Estonian University of Life Sciences, Tartu, Estonia
| | - P Padrik
- Animal Breeders' Association of Estonia, Raplamaa, Estonia
| | - V Siino
- Department of Immunotechnology, Lund University, Lund, Sweden
| | - D J de Koning
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - E Andreasson
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - F Levander
- Department of Immunotechnology, Lund University, Lund, Sweden.
| | - P Humblot
- Department of Clinical Sciences, Division of Reproduction, Swedish University of Agricultural Sciences, Uppsala, Sweden.
| |
Collapse
|
10
|
Recazens E, Mouisel E, Langin D. Hormone-sensitive lipase: sixty years later. Prog Lipid Res 2020; 82:101084. [PMID: 33387571 DOI: 10.1016/j.plipres.2020.101084] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/12/2020] [Accepted: 12/24/2020] [Indexed: 12/19/2022]
Abstract
Hormone-sensitive lipase (HSL) was initially characterized as the hormonally regulated neutral lipase activity responsible for the breakdown of triacylglycerols into fatty acids in adipose tissue. This review aims at providing up-to-date information on structural properties, regulation of expression, activity and function as well as therapeutic potential. The lipase is expressed as different isoforms produced from tissue-specific alternative promoters. All isoforms are composed of an N-terminal domain and a C-terminal catalytic domain within which a regulatory domain containing the phosphorylation sites is embedded. Some isoforms possess additional N-terminal regions. The catalytic domain shares similarities with bacteria, fungus and vascular plant proteins but not with other mammalian lipases. HSL singularity is provided by regulatory and N-terminal domains sharing no homology with other proteins. HSL has a broad substrate specificity compared to other neutral lipases. It hydrolyzes acylglycerols, cholesteryl and retinyl esters among other substrates. A novel role of HSL, independent of its enzymatic function, has recently been described in adipocytes. Clinical studies revealed dysregulations of HSL expression and activity in disorders, such as lipodystrophy, obesity, type 2 diabetes and cancer-associated cachexia. Development of specific inhibitors positions HSL as a pharmacological target for the treatment of metabolic complications.
Collapse
Affiliation(s)
- Emeline Recazens
- Institute of Metabolic and Cardiovascular Diseases, Institut National de la Santé et de la Recherche Médicale (Inserm), UMR1297, 31432 Toulouse, France; University of Toulouse, Paul Sabatier University, UMR1297, Toulouse, France
| | - Etienne Mouisel
- Institute of Metabolic and Cardiovascular Diseases, Institut National de la Santé et de la Recherche Médicale (Inserm), UMR1297, 31432 Toulouse, France; University of Toulouse, Paul Sabatier University, UMR1297, Toulouse, France
| | - Dominique Langin
- Institute of Metabolic and Cardiovascular Diseases, Institut National de la Santé et de la Recherche Médicale (Inserm), UMR1297, 31432 Toulouse, France; University of Toulouse, Paul Sabatier University, UMR1297, Toulouse, France; Franco-Czech Laboratory for Clinical Research on Obesity, Third Faculty of Medicine, Prague and Paul Sabatier University, Toulouse, France; Toulouse University Hospitals, Laboratory of Clinical Biochemistry, Toulouse, France.
| |
Collapse
|
11
|
Masaki H, Kim N, Nakamura H, Kumasawa K, Kamata E, Hirano KI, Kimura T. Long-chain fatty acid triglyceride (TG) metabolism disorder impairs male fertility: a study using adipose triglyceride lipase deficient mice. Mol Hum Reprod 2018; 23:452-460. [PMID: 28510703 DOI: 10.1093/molehr/gax031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/12/2017] [Indexed: 01/08/2023] Open
Abstract
STUDY QUESTION Does the deletion of adipose triglyceride lipase (Atgl) gene impair male fertility? SUMMARY ANSWER The deletion of Atgl gene impaired male fertility but the effect was partially reversed by a low long-chain triglyceride (TG) diet. WHAT IS KNOWN ALREADY ATGL specifically hydrolyses long-chain fatty acid TG to diacylglycerol and a high level of expression of ATGL in testes has been reported. However, the role of ATGL in male fertility is unknown. STUDY DESIGN, SIZE, DURATION To investigate the effect of deletion of Atgl gene on male fertility, cauda epididymides and testes were collected from wild-type, heterozygous and homozygous Atgl-deficient mice at 10 weeks of age and epididymal sperm analysis and histological analysis of the testes were performed. To investigate whether a medium-chain triglycerides (MCTs) replacement diet mitigated the impaired male fertility by deletion of Atgl gene, homozygous Atgl-deficient mice were fed a MCT replacement diet, or a standard diet including long-chain triglycerides (LCTs) in a control group, for 6 weeks from 5 weeks of age (n = 22). The systematic and local effects of the MCT replacement diet on spermatogenesis and sperm maturation in the epididymis were analyzed at 10 weeks of age. PARTICIPANTS/MATERIALS, SETTING, METHODS Hematoxylin and eosin staining in paraffin-embedded sections of testes and Oil Red O staining in frozen sections of testes were performed. The epididymal sperm concentrations were analyzed. Statistical analyses were performed using the Student's t-test or Mann-Whitney U test with Shapiro-Wilk Normality test. MAIN RESULTS AND THE ROLE OF CHANCE Although heterozygous mice were fertile and showed a similar number of epididymal total and motile sperm concentrations to wild-type mice, the deletion of Atgl gene in homozygous mice led to accumulation of TG deposits in testes and impaired spermatogenesis. The deletion of Atgl gene also impaired the sperm maturation process required for sperm to acquire the ability to move forward in the epididymis. The MCT replacement diet for 6 weeks increased the plasma level of non-esterified fatty acid (NEFA) (1.5-fold, P = 0.005), but not the plasma total cholesterol (T-Cho) and TG levels. In testes, the MCT replacement diet decreased the number of Oil Red O stain positive vacuoles (-40%, P < 0.001) and increased testis tissue weight (1.1-fold, P = 0.012), total sperm concentration (1.5-fold, P = 0.011) and motile sperm concentration (2.1-fold, P < 0.001) compared to the control group. However, there was no significant change in the sperm survival rate between the two groups. LARGE SCALE DATA None. LIMITATIONS REASONS FOR CAUTION One previous study reported that Atgl-deficient male mice were fertile. In most studies heterozygous Atgl(+/-) mice were used to generate homozygous Atgl-deficient Atgl(-/-) mice. Although the same gene targeting mice were used in this study and the formation of vaginal plugs were observed after mating with Atgl(-/-) male mice, there were no pregnant wild-type mice observed after mating with Atgl(-/-) male mice. WIDER IMPLICATIONS OF THE FINDINGS Local TG metabolism in the male reproductive system could affect spermatogenesis and sperm motility in men. The MCT replacement diet could be an effective therapy for idiopathic non-obstructive oligozoospermia or asthenozoospermia in men with low levels of serum NEFA. STUDY FUNDING AND COMPETING INTEREST(S) This study was supported in part by the Japan Society for the Promotion of Science JSPS KAKENHI Grant (Nos. JP24249080, JP25462557, JP16K11086). The authors declare no conflict of interest.
Collapse
Affiliation(s)
- Hidetake Masaki
- Department of Obstetrics and Gynaecology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Namhyo Kim
- Department of Obstetrics and Gynaecology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Hitomi Nakamura
- Department of Obstetrics and Gynaecology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Keiichi Kumasawa
- Department of Obstetrics and Gynaecology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Eriko Kamata
- Department of Obstetrics and Gynaecology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Ken-Ichi Hirano
- Laboratory for Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics (CNT), Osaka University Graduate School of Medicine, 6-2-3 Furuedai, Suita, Osaka 5650874, Japan.,Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
| | - Tadashi Kimura
- Department of Obstetrics and Gynaecology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
| |
Collapse
|
12
|
Stocchi L, Giardina E, Varriale L, Sechi A, Vagnini A, Parri G, Valentini M, Capalbo M. Can Tangier disease cause male infertility? A case report and an overview on genetic causes of male infertility and hormonal axis involved. Mol Genet Metab 2018; 123:43-49. [PMID: 29198592 DOI: 10.1016/j.ymgme.2017.11.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/24/2017] [Accepted: 11/24/2017] [Indexed: 11/18/2022]
Abstract
Tangier disease is an autosomal recessive disorder caused by mutations in the ABCA1 gene and characterized by the accumulation of cholesteryl ester in various tissues and a near absence of high-density lipoprotein. The subject in this investigation was a 36-year-old Italian man with Tangier disease. He and his wife had come to the In Vitro Fertilization Unit, Pesaro Hospital (Azienda Ospedaliera Ospedali Riuniti Marche Nord) seeking help regarding fertility issues. The man was diagnosed with severe oligoasthenoteratozoospermia. Testosterone is the sex hormone necessary for spermatogenesis and cholesterol is its precursor; hence, we hypothesized that the characteristic cholesterol deficiency in Tangier disease patients could compromise their fertility. The aim of the study was to therefore to determine if there is an association between Tangier disease and male infertility. After excluding viral, infectious, genetic and anatomical causes of the subject's oligoasthenoteratozoospermia, we performed a hormonal analysis to verify our hypothesis. The patient was found to be negative for frequent bacteria and viruses. The subject showed a normal male karyotype and tested negative for Yq microdeletions and Cystic Fibrosis Transmembrane Conductance Regulator gene mutations. A complete urological examination was performed, and primary hypogonadism was also excluded. Conversely, hormonal analyses showed that the subject had a high level of follicle stimulating hormone and luteinizing hormone, low total testosterone and a significant decline in inhibin B. We believe that the abnormally low cholesterol levels typically found in subjects with Tangier disease may result in a reduced testosterone production which in turn could affect the hormonal axis responsible for spermatogenesis leading to a defective maturation of spermatozoa.
Collapse
Affiliation(s)
- Laura Stocchi
- Pathophysiology of Reproduction, U.O.C., IVF Unit, Azienda Ospedaliera Ospedali Riuniti Marche Nord, Pesaro, Italy.
| | - Emiliano Giardina
- Laboratory of Genomic Medicine-UILDM, Fondazione Santa Lucia IRCCS, Univ. Tor Vergata; Rome, Italy.
| | - Luigia Varriale
- Department of Clinical Pathology, U.O.S.D. D.A.L.T., Azienda Ospedaliera Ospedali Riuniti Marche Nord, Pesaro, Italy.
| | - Annalisa Sechi
- Regional Center for Rare Diseases, Academic Hospital of Udine, Italy.
| | - Andrea Vagnini
- Department of Clinical Pathology, U.O.S.D. D.A.L.T., Azienda Ospedaliera Ospedali Riuniti Marche Nord, Pesaro, Italy.
| | - Gianni Parri
- Department of Urology, Azienda Ospedaliera Ospedali Riuniti Marche Nord, Pesaro, Italy.
| | - Massimo Valentini
- Department of Clinical Pathology, U.O.S.D. D.A.L.T., Azienda Ospedaliera Ospedali Riuniti Marche Nord, Pesaro, Italy.
| | - Maria Capalbo
- General Director of Azienda Ospedaliera Ospedali Riuniti Marche Nord, Pesaro, Italy.
| |
Collapse
|
13
|
Anel-López L, Ortega-Ferrusola C, Martínez-Rodríguez C, Álvarez M, Borragán S, Chamorro C, Peña FJ, Anel L, de Paz P. Analysis of seminal plasma from brown bear (Ursus arctos) during the breeding season: Its relationship with testosterone levels. PLoS One 2017; 12:e0181776. [PMID: 28771486 PMCID: PMC5542667 DOI: 10.1371/journal.pone.0181776] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 07/06/2017] [Indexed: 02/06/2023] Open
Abstract
Seminal plasma (SP) plays an important role in the motility, viability and maintenance of the fertilizing capacity of mammalian spermatozoa. This study is the first on brown bear (Ursus arctos) SP components, and has two main objectives: 1) to define the SP composition in bear ejaculate and 2) to identify variations in SP composition in relation to high and low levels of testosterone in serum during the breeding season. Forty-eight sperm samples from 30 sexually mature male brown bears (Ursus arctos) were obtained by electroejaculation, and their serum testosterone levels were assessed to sort the animals into 2 groups (high and low testosterone levels, threshold 5 ng/dl). The biochemical and protein compositions of the SP samples were assessed, and sperm motility was analyzed. We found that lactate dehydrogenase was significantly higher in the low-serum-testosterone samples, while concentrations of lipase and Mg+ values were significantly higher in the high-serum-testosterone samples. In contrast, sperm motility did not significantly differ (P>0.05) between the testosterone level groups (total motility: 74.42.8% in the high-level group vs. 77.1±4.7% in the low-level group). A reference digital model was constructed since there is no information for this wild species. To do this, all gel images were added in a binary multidimensional image and thirty-three spots were identified as the most-repeated spots. An analysis of these proteins was done by qualitative equivalency (isoelectric point and molecular weight) with published data for a bull. SP protein composition was compared between bears with high and low serum testosterone, and three proteins (binder of sperm and two enzymes not identified in the reference bull) showed significant (P<0.05) quantitative differences. We conclude that male bears with high or low serum testosterone levels differs only in some properties of their SP, differences in enzyme LDIP2, energy source LACT2, one protein (similar to BSP1) and Mg ion were identified between these two groups. These data may inform the application of SP to improve bear semen extenders.
Collapse
Affiliation(s)
- L. Anel-López
- Animal Reproduction and Obstetrics, University of León, Spain
- ITRA-ULE, INDEGSAL, University of León, León, Spain
- * E-mail:
| | - C. Ortega-Ferrusola
- Animal Reproduction and Obstetrics, University of León, Spain
- ITRA-ULE, INDEGSAL, University of León, León, Spain
| | - C. Martínez-Rodríguez
- ITRA-ULE, INDEGSAL, University of León, León, Spain
- Molecular Biology (Cell Biology), University of León, León, Spain
| | - M. Álvarez
- Animal Reproduction and Obstetrics, University of León, Spain
- ITRA-ULE, INDEGSAL, University of León, León, Spain
| | | | - C. Chamorro
- ITRA-ULE, INDEGSAL, University of León, León, Spain
- Veterinary Anatomy, University of León, León, Spain
| | - F. J. Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - L. Anel
- Animal Reproduction and Obstetrics, University of León, Spain
- ITRA-ULE, INDEGSAL, University of León, León, Spain
| | - P. de Paz
- ITRA-ULE, INDEGSAL, University of León, León, Spain
- Molecular Biology (Cell Biology), University of León, León, Spain
| |
Collapse
|
14
|
Wang F, Chen Z, Ren X, Tian Y, Wang F, Liu C, Jin P, Li Z, Zhang F, Zhu B. Hormone-sensitive lipase deficiency alters gene expression and cholesterol content of mouse testis. Reproduction 2016; 153:175-185. [PMID: 27920259 PMCID: PMC5148802 DOI: 10.1530/rep-16-0484] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 10/04/2016] [Accepted: 11/10/2016] [Indexed: 12/15/2022]
Abstract
Hormone-sensitive lipase-knockout (HSL−/−) mice exhibit azoospermia for unclear reasons. To explore the basis of sterility, we performed the following three experiments. First, HSL protein distribution in the testis was determined. Next, transcriptome analyses were performed on the testes of three experimental groups. Finally, the fatty acid and cholesterol levels in the testes with three different genotypes studied were determined. We found that the HSL protein was present from spermatocyte cells to mature sperm acrosomes in wild-type (HSL+/+) testes. Spermiogenesis ceased at the elongation phase of HSL−/− testes. Transcriptome analysis indicated that genes involved in lipid metabolism, cell membrane, reproduction and inflammation-related processes were disordered in HSL−/− testes. The cholesterol content was significantly higher in HSL−/− than that in HSL+/+ testis. Therefore, gene expression and cholesterol ester content differed in HSL−/− testes compared to other testes, which may explain the sterility of male HSL−/− mice.
Collapse
Affiliation(s)
- Feng Wang
- College of Life SciencesCapital Normal University, Beijing, China
| | - Zheng Chen
- College of Life SciencesCapital Normal University, Beijing, China
| | - Xiaofang Ren
- College of Life SciencesCapital Normal University, Beijing, China
| | - Ye Tian
- College of Life SciencesCapital Normal University, Beijing, China
| | - Fucheng Wang
- College of Life SciencesCapital Normal University, Beijing, China
| | - Chao Liu
- College of Life SciencesCapital Normal University, Beijing, China
| | - Pengcheng Jin
- College of Life SciencesCapital Normal University, Beijing, China
| | - Zongyue Li
- College of Life SciencesCapital Normal University, Beijing, China
| | - Feixiong Zhang
- College of Life SciencesCapital Normal University, Beijing, China
| | - Baochang Zhu
- College of Life SciencesCapital Normal University, Beijing, China
| |
Collapse
|
15
|
Whitmore LS, Ye P. Dissecting Germ Cell Metabolism through Network Modeling. PLoS One 2015; 10:e0137607. [PMID: 26367011 PMCID: PMC4721539 DOI: 10.1371/journal.pone.0137607] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 08/20/2015] [Indexed: 11/18/2022] Open
Abstract
Metabolic pathways are increasingly postulated to be vital in programming cell fate, including stemness, differentiation, proliferation, and apoptosis. The commitment to meiosis is a critical fate decision for mammalian germ cells, and requires a metabolic derivative of vitamin A, retinoic acid (RA). Recent evidence showed that a pulse of RA is generated in the testis of male mice thereby triggering meiotic commitment. However, enzymes and reactions that regulate this RA pulse have yet to be identified. We developed a mouse germ cell-specific metabolic network with a curated vitamin A pathway. Using this network, we implemented flux balance analysis throughout the initial wave of spermatogenesis to elucidate important reactions and enzymes for the generation and degradation of RA. Our results indicate that primary RA sources in the germ cell include RA import from the extracellular region, release of RA from binding proteins, and metabolism of retinal to RA. Further, in silico knockouts of genes and reactions in the vitamin A pathway predict that deletion of Lipe, hormone-sensitive lipase, disrupts the RA pulse thereby causing spermatogenic defects. Examination of other metabolic pathways reveals that the citric acid cycle is the most active pathway. In addition, we discover that fatty acid synthesis/oxidation are the primary energy sources in the germ cell. In summary, this study predicts enzymes, reactions, and pathways important for germ cell commitment to meiosis. These findings enhance our understanding of the metabolic control of germ cell differentiation and will help guide future experiments to improve reproductive health.
Collapse
Affiliation(s)
- Leanne S. Whitmore
- School of Molecular Biosciences, Washington State University, PO Box 647520, Pullman, Washington, 99164, United States of America
| | - Ping Ye
- School of Molecular Biosciences, Washington State University, PO Box 647520, Pullman, Washington, 99164, United States of America
- Department of Molecular and Experimental Medicine, Avera Cancer Institute, 1000 E 23rd Street, Sioux Falls, South Dakota, 57105, United States of America
- * E-mail:
| |
Collapse
|
16
|
Ma B, Qi H, Li J, Xu H, Chi B, Zhu J, Yu L, An G, Zhang Q. Triptolide disrupts fatty acids and peroxisome proliferator-activated receptor (PPAR) levels in male mice testes followed by testicular injury: A GC-MS based metabolomics study. Toxicology 2015. [PMID: 26219505 DOI: 10.1016/j.tox.2015.07.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Triptolide is the major active ingredient of Tripterygium Glycosides (TG), a traditional Chinese medicine with very potent anti-inflammatory effects and has been used in China for the treatment of rheumatoid arthritis and many other inflammatory diseases. However, clinical application of triptolide is restricted due to its multiple side effects, especially male infertility. The mechanism of triptolide on reproduction toxicity remains unclear. In the present study, a GC-MS based metabolomic approach was employed to evaluate the mechanism of triptolide-induced reproductive toxicity as well as identify potential novel biomarkers for the early detection of spermatogenesis dysfunction. In brief, male mice were divided into two groups with or without triptolide intraperitoneal injection at 60 μg/kg/day for 2 weeks and toxic effect of triptolide on testicular tissues were examined by biochemical indicator analysis, testis histopathologic analysis, and sperm quantity analysis. Metabolomics technology was then performed to evaluate systematically the endogenous metabolites profiling. Our results demonstrated that triptolide suppressed the marker-enzymes of spermatogenesis and testosterone levels, decreased sperm counts, reduced the gonad index and destroyed the microstructure of testis. Multivariate data analysis revealed that mice with triptolide induced testicular toxicity could be distinctively differentiated from normal animals and 35 and 39 small molecule metabolites were changed significantly in testis and serum, respectively (Fold-changes >1.5, P<0.05), in triptolide-treated mice. Abnormal level of fatty acids, an important energy source of sertoli cells with critical role in maintaining normal function of the testis tissue, was observed in triptolide-treated mice. Additionally, the protein expressions of PPAR, a transcription factor known to play a pivotal role in lipid and energy metabolism was significantly decreased in the testis tissue of triptolide-treated mice. In summary, our study represents the first comprehensive GC-MS based metabolomics analysis of triptolide-induced testicular toxicity. We reported for the first time that exposure to triptolide led to marked changes of a panel of endogenous metabolites in both testis and serum. The impairment of spermatogenesis may be caused by abnormal lipid and energy metabolism in testis via the down-regulation of PPARs mediated by triptolide. The presence of research suggested that PPARs and its related fatty acids metabolism may serve as potential targets for intervention or treatment of male infertility induced by triptolide.
Collapse
Affiliation(s)
- Bo Ma
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Huanhuan Qi
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Jing Li
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Hong Xu
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Bo Chi
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Jianwei Zhu
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Lisha Yu
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China
| | - Guohua An
- Division of Pharmaceutics and Translational Therapeutics, College of Pharmacy, University of Iowa, Iowa City, IA, USA
| | - Qi Zhang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, People's Republic of China.
| |
Collapse
|
17
|
Goszczynski DE, Mazzucco JP, Ripoli MV, Villarreal EL, Rogberg-Muñoz A, Mezzadra CA, Melucci LM, Giovambattista G. Characterization of the bovine gene LIPE and possible influence on fatty acid composition of meat. Meta Gene 2014; 2:746-60. [PMID: 25606458 PMCID: PMC4287880 DOI: 10.1016/j.mgene.2014.09.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 08/26/2014] [Accepted: 09/03/2014] [Indexed: 12/31/2022] Open
Abstract
LIPE is an intracellular neutral lipase, which is capable of hydrolyzing a variety of esters and plays a key role in the mobilization of fatty acids from diacylglycerols. The objectives of this study were to characterize the genetic polymorphism of bovine LIPE gene and to evaluate the possible association between three SNPs in the coding regions of this gene with the fatty acid composition of meat in a cattle population. Forty-three unrelated animals from different cattle breeds were re-sequenced and 21 SNPs were detected over approximately 2600 bp, five of these SNPs were novel. Three SNPs were selected, on the basis of evolutionary conservation, to perform validation and association studies in a crossbred cattle population. Our results may suggest a possible association of SNP1 with contents of oleic acid and total monounsaturated fatty acids (p < 0.01), and SNP2 and SNP3 with Heneicosylic acid content (p < 0.01), may be helpful to improve the quality of meat and improve health.
Collapse
Key Words
- ALBP, adipocyte lipid binding protein
- Bovine
- C18:1c9, oleic acid
- C21:0, heneicosylic acid
- Ct, C-terminal
- F1, first filial
- F2, second filial
- GNRHR, gonadotropin-releasing hormone receptor
- HWE, Hardy–Weinberg equilibrium
- INTA, National Institute of Agricultural Technology
- LIPE
- LIPE, hormone-sensitive lipase
- Lipid content
- MUFA, total monounsaturated fatty acids
- Nt, N-terminal
- PCR, polymerase chain reaction
- Polymorphism
- R, regulatory module
- SNP, single nucleotide polymorphism
- he, unbiased expected heterozygosity
- ho, observed heterozygosity
- n, number of samples
- p, p-value
- pb, base pairs
Collapse
Affiliation(s)
- Daniel Estanislao Goszczynski
- IGEVET, CCT LA PLATA CONICET, FCV, UNLP, La Plata B1900AVW, CC 296, Argentina
- Fellow of the Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Argentina
| | | | | | | | | | | | | | | |
Collapse
|
18
|
DeAngelis AM, Roy-O'Reilly M, Rodriguez A. Genetic alterations affecting cholesterol metabolism and human fertility. Biol Reprod 2014; 91:117. [PMID: 25122065 DOI: 10.1095/biolreprod.114.119883] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Single nucleotide polymorphisms (SNPs) represent genetic variations among individuals in a population. In medicine, these small variations in the DNA sequence may significantly impact an individual's response to certain drugs or influence the risk of developing certain diseases. In the field of reproductive medicine, a significant amount of research has been devoted to identifying polymorphisms which may impact steroidogenesis and fertility. This review discusses current understanding of the effects of genetic variations in cholesterol metabolic pathways on human fertility that bridge novel linkages between cholesterol metabolism and reproductive health. For example, the role of the low-density lipoprotein receptor (LDLR) in cellular metabolism and human reproduction has been well studied, whereas there is now an emerging body of research on the role of the high-density lipoprotein (HDL) receptor scavenger receptor class B type I (SR-BI) in human lipid metabolism and female reproduction. Identifying and understanding how polymorphisms in the SCARB1 gene or other genes related to lipid metabolism impact human physiology is essential and will play a major role in the development of personalized medicine for improved diagnosis and treatment of infertility.
Collapse
Affiliation(s)
| | | | - Annabelle Rodriguez
- Center for Vascular Biology, University of Connecticut Health Center, Farmington, Connecticut
| |
Collapse
|
19
|
Amaral A, Castillo J, Ramalho-Santos J, Oliva R. The combined human sperm proteome: cellular pathways and implications for basic and clinical science. Hum Reprod Update 2013; 20:40-62. [DOI: 10.1093/humupd/dmt046] [Citation(s) in RCA: 184] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
|
20
|
Vatannejad A, Khodadadi I, Amiri I, Vaisi-Raygani A, Ghorbani M, Tavilani H. Genetic variation of hormone sensitive lipase and male infertility. Syst Biol Reprod Med 2011; 57:288-91. [PMID: 21919688 DOI: 10.3109/19396368.2011.608179] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Hormone sensitive lipase (HSL) is a triacylglycerol hydrolase and cholesterol esterase that is essential for male fertility. The aim of the study was to investigate the distribution of C-60G polymorphism of HSL gene and alleles in fertile and infertile males living in Hamadan, Iran. In addition, lipase activity was determined in these two groups. The HSL genotype was determined by PCR-RFLP and the lipase activity was detected by turbidometery in 164 fertile and 169 infertile males. A significant difference in HSL genotype distribution was observed between groups (χ2 = 8.1, df = 2, p = 0.017). Infertile males showed a higher percentage of CC as well as a lower percentage of CG and GG genotype compared with fertile individuals. The presence of CC to CG + GG genotype conferred a 2.4-fold risk for male infertility (odds ratio = 2.4 (1.3 - 4.5), p = 0.006). In addition, lipase activity was remarkably higher (p < 0.001) in fertile males (94 ± 66 U/L) compared to the infertile subjects (50.6 ± 49 U/L). This suggests that genetic variation of HSL may be a risk factor for male infertility.
Collapse
Affiliation(s)
- Akram Vatannejad
- Department of Biochemistry, Medical School, Hamadan University of Medical Sciences, Hamadan, Iran
| | | | | | | | | | | |
Collapse
|
21
|
Wai T, Ao A, Zhang X, Cyr D, Dufort D, Shoubridge EA. The role of mitochondrial DNA copy number in mammalian fertility. Biol Reprod 2010; 83:52-62. [PMID: 20130269 PMCID: PMC2888963 DOI: 10.1095/biolreprod.109.080887] [Citation(s) in RCA: 293] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2009] [Revised: 09/15/2009] [Accepted: 01/13/2010] [Indexed: 12/31/2022] Open
Abstract
Mammalian mitochondrial DNA (mtDNA) is a small, maternally inherited genome that codes for 13 essential proteins in the respiratory chain. Mature oocytes contain more than 150 000 copies of mtDNA, at least an order of magnitude greater than the number in most somatic cells, but sperm contain only approximately 100 copies. Mitochondrial oxidative phosphorylation has been suggested to be an important determinant of oocyte quality and sperm motility; however, the functional significance of the high mtDNA copy number in oocytes, and of the low copy number in sperm, remains unclear. To investigate the effects of mtDNA copy number on fertility, we genetically manipulated mtDNA copy number in the mouse by deleting one copy of Tfam, an essential component of the mitochondrial nucleoid, at different stages of germline development. We show that males can tolerate at least a threefold reduction in mtDNA copy number in their sperm without impaired fertility, and in fact, they preferentially transmit a deleted Tfam allele. Surprisingly, oocytes with as few as 4000 copies of mtDNA can be fertilized and progress normally through preimplantation development to the blastocyst stage. The mature oocyte, however, has a critical postimplantation developmental threshold of 40 000-50 000 copies of mtDNA in the mature oocyte. These observations suggest that the high mtDNA copy number in the mature oocyte is a genetic device designed to distribute mitochondria and mtDNAs to the cells of the early postimplantation embryo before mitochondrial biogenesis and mtDNA replication resumes, whereas down-regulation of mtDNA copy number is important for normal sperm function.
Collapse
Affiliation(s)
- Timothy Wai
- Montreal Neurological Institute and Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Asangla Ao
- Departments of Obstetrics and Gynecology and Human Genetics and Division of Experimental Medicine, McGill University Health Center, Royal Victoria Hospital, Montreal, Quebec, Canada
| | - Xiaoyun Zhang
- Departments of Obstetrics and Gynecology and Human Genetics and Division of Experimental Medicine, McGill University Health Center, Royal Victoria Hospital, Montreal, Quebec, Canada
| | - Daniel Cyr
- INRS-Instiut Armand Frappier, Université du Québec, Laval, Québec, Canada
| | - Daniel Dufort
- Departments of Obstetrics and Gynecology and Human Genetics and Division of Experimental Medicine, McGill University Health Center, Royal Victoria Hospital, Montreal, Quebec, Canada
| | - Eric A. Shoubridge
- Montreal Neurological Institute and Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| |
Collapse
|
22
|
Hermo L, Pelletier RM, Cyr DG, Smith CE. Surfing the wave, cycle, life history, and genes/proteins expressed by testicular germ cells. Part 5: intercellular junctions and contacts between germs cells and Sertoli cells and their regulatory interactions, testicular cholesterol, and genes/proteins associated with more than one germ cell generation. Microsc Res Tech 2010; 73:409-94. [PMID: 19941291 DOI: 10.1002/jemt.20786] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In the testis, cell adhesion and junctional molecules permit specific interactions and intracellular communication between germ and Sertoli cells and apposed Sertoli cells. Among the many adhesion family of proteins, NCAM, nectin and nectin-like, catenins, and cadherens will be discussed, along with gap junctions between germ and Sertoli cells and the many members of the connexin family. The blood-testis barrier separates the haploid spermatids from blood borne elements. In the barrier, the intercellular junctions consist of many proteins such as occludin, tricellulin, and claudins. Changes in the expression of cell adhesion molecules are also an essential part of the mechanism that allows germ cells to move from the basal compartment of the seminiferous tubule to the adluminal compartment thus crossing the blood-testis barrier and well-defined proteins have been shown to assist in this process. Several structural components show interactions between germ cells to Sertoli cells such as the ectoplasmic specialization which are more closely related to Sertoli cells and tubulobulbar complexes that are processes of elongating spermatids embedded into Sertoli cells. Germ cells also modify several Sertoli functions and this also appears to be the case for residual bodies. Cholesterol plays a significant role during spermatogenesis and is essential for germ cell development. Lastly, we list genes/proteins that are expressed not only in any one specific generation of germ cells but across more than one generation.
Collapse
Affiliation(s)
- Louis Hermo
- Faculty of Medicine, Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 2B2.
| | | | | | | |
Collapse
|
23
|
Abstract
The ability to store energy in the form of energy-dense TAG (triacylglycerol) and to mobilize these stores rapidly during times of low carbohydrate availability (fasting or famine) or during heightened metabolic demand (exercise or cold-stress) is a highly conserved process essential for survival. Today, in the presence of nutrient excess and sedentary lifestyles, the regulation of this pathway is viewed as an important therapeutic target for disease prevention, as elevated circulating fatty acids in obesity contribute to many aspects of the metabolic syndrome including hepatic steatosis, atherosclerosis and insulin resistance. In the present review, we discuss the metabolic regulation and function of TAG lipases with a focus on HSL (hormone-sensitive lipase), ATGL (adipose triacylglycerol lipase) and newly identified members of the lipolytic proteome.
Collapse
|