1
|
Kizasu S, Sato T, Inoue Y, Tasaki H, Shirasuna K, Okiishi Y, Iwata H. Effect of low ethanol concentration in maturation medium on developmental ability, mitochondria, and gene expression profile in mouse oocytes. Reprod Biol 2024; 24:100854. [PMID: 38772287 DOI: 10.1016/j.repbio.2023.100854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/14/2023] [Accepted: 12/31/2023] [Indexed: 05/23/2024]
Abstract
Ethanol affects pre-conceptional oocyte quality in women. In this study, we examined the effect of low ethanol concentrations on mouse oocytes. Oocytes were collected from the ovaries of 9-10 week old mice and allowed to mature in vitro in the presence of low concentrations of ethanol (0.1% and 0.2% v/v) for 24 h. Treatment of oocytes with ethanol (0.2%) during maturation decreased the mitochondrial DNA content and membrane potential compared to that in untreated ones, whereas the ATP content did not differ between the groups. Both 0.1% and 0.2% ethanol reduced the lipid content in the oocytes. In addition, immunostaining revealed that oocytes cultured in maturation medium containing ethanol (0.2%) had reduced levels of global DNA methylation and DNMT3A compared with untreated oocytes, and decreased rate of blastocyst development with low mitochondrial protein levels (TOMM40) in embryo. RNA-sequencing of the ethanol-treated (0.2%) and untreated oocytes revealed that mitochondria were a major target of ethanol. In conclusion, treatment of oocytes with low concentration of ethanol reduces the developmental rate to the blastocyst stage, with a lower total cell number and global DNA methylation. In addition, ethanol affected mitochondrial function and mitochondria-related gene expression.
Collapse
Affiliation(s)
- Susaki Kizasu
- Animal Science, Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | - Takuya Sato
- Animal Science, Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | - Yuki Inoue
- Animal Science, Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | - Hidetaka Tasaki
- Assisted Reproductive Technology Center, Okayama University, Okayama, Japan
| | - Komei Shirasuna
- Animal Science, Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | - Yuichi Okiishi
- Animal Science, Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan
| | - Hisataka Iwata
- Animal Science, Tokyo University of Agriculture, Funako 1737, Atsugi 243-0034, Japan.
| |
Collapse
|
2
|
Sato T, Hamazaki M, Inoue Y, Aoki S, Koshiishi Y, Shirasuna K, Iwata H. Effect of a low ethanol concentration during in vitro maturation of bovine oocytes and subsequent embryo development. Theriogenology 2023; 208:158-164. [PMID: 37331264 DOI: 10.1016/j.theriogenology.2023.06.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/06/2023] [Accepted: 06/06/2023] [Indexed: 06/20/2023]
Abstract
The present study investigated the effects of low ethanol exposure on bovine oocytes. Cumulus-oocyte complexes (COCs) were aspirated for the antral follicles of slaughterhouse-derived ovaries. These COCs were incubated in maturation medium containing 0, 0.1, and 0.2% ethanol for 21 h and subjected to fertilization and in vitro development, and then the rates of nuclear maturation, mitochondrial DNA copy number (Mt-cn) and protein (TOMM40), ATP content and lipid content in oocyte, fertilization, and blastulation were examined. Furthermore, COCs were incubated with 0 or 0.1% ethanol and then mitochondrial membrane potential (MMP) and the glucose consumption of COCs was determined. In addition, gene expression in oocytes was examined by RNA sequencing. Ethanol (0.1 and 0.2%) increased Mt-cn and Mt-protein levels whereas 0.2% ethanol increased the blastulation rate and ATP content in oocytes and decreased lipid content in oocytes. Ethanol (0.1%) increased MMP in oocytes and decreased glucose consumption of COCs. Eight stage embryos derived from 0.1% ethanol treated oocytes had higher levels of trimethyl-H3K9 compared with that of nontreated counterpart. RNA sequencing revealed that differentially expressed genes were associated with glycolysis/gluconeogenesis, carbon metabolism, sphingolipid metabolism, amino acid metabolism, and fatty acid degradation pathways. In conclusion, even 0.1% concentrations of ethanol during in vitro maturation considerably affects oocyte metabolism and histone configuration of embryos.
Collapse
Affiliation(s)
- Takuya Sato
- Tokyo University of Agriculture, Funako 1737, Atsugi City, Japan
| | - Mao Hamazaki
- Tokyo University of Agriculture, Funako 1737, Atsugi City, Japan
| | - Yuki Inoue
- Tokyo University of Agriculture, Funako 1737, Atsugi City, Japan
| | - Sogo Aoki
- Tokyo University of Agriculture, Funako 1737, Atsugi City, Japan
| | | | - Koumei Shirasuna
- Tokyo University of Agriculture, Funako 1737, Atsugi City, Japan
| | - Hisataka Iwata
- Tokyo University of Agriculture, Funako 1737, Atsugi City, Japan.
| |
Collapse
|
3
|
Báez F, Gómez B, de Brun V, Rodríguez-Osorio N, Viñoles C. Effect of Ethanol on Parthenogenetic Activation and α-Tocopherol Supplementation during In Vitro Maturation on Developmental Competence of Summer-Collected Bovine Oocytes. Curr Issues Mol Biol 2021; 43:2253-2265. [PMID: 34940132 PMCID: PMC8929142 DOI: 10.3390/cimb43030158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/13/2021] [Accepted: 12/13/2021] [Indexed: 12/27/2022] Open
Abstract
The use of α-tocopherol during in vitro maturation (IVM) is an alternative to minimize the adverse effects of heat stress on oocyte competence. However, α-tocopherol is diluted in ethanol, which can induce oocyte parthenogenetic activation (PA). This study aimed to evaluate the role of ethanol concentration on PA and the effect of α-tocopherol supplementation during IVM on the developmental competence and the expression of key genes in blastocysts derived from summer-collected oocytes. All in vitro embryo production was conducted at 5% O2, 5% CO2 at 38.5 °C. Experiment 1: oocytes were cultured with or without 0.05% ethanol. As positive PA control matured oocytes were subjected to 3% or 7% ethanol for 7 min. Oocytes from all groups were placed in fertilization medium (22 h) and culture medium (9 days). Ethanol at 0.05% during IVM did not induce oocyte PA, however, 3% and 7% ethanol were effective parthenogenetic inductors. Experiment 2: oocytes were cultured in maturation medium supplemented with 0, 50, 100 and 200 μM α-tocopherol, diluted in 0.05% ethanol. After in vitro fertilization and embryo culture, we assessed blastocyst apoptotic index and the transcription of a panel of genes. The results showed that supplementation with 100 μM α-tocopherol reduced apoptotic index and increased the expression of SOD2. In conclusion, 100 μM α-tocopherol, diluted in 0.05% ethanol, can be used during IVM to embryonic quality.
Collapse
Affiliation(s)
- Francisco Báez
- Instituto Superior de la Carne, Centro Universitario Regional Noreste, Universidad de la República, Ruta 5, km 386, Tacuarembó 45000, Uruguay;
- Correspondence:
| | - Belén Gómez
- Instituto Superior de la Carne, Centro Universitario Regional Noreste, Universidad de la República, Ruta 5, km 386, Tacuarembó 45000, Uruguay;
| | - Victoria de Brun
- Laboratorio de Endocrinología y Metabolismo Animal, Universidad de la República, Laspalces 1620, Montevideo 45000, Uruguay;
| | - Nélida Rodríguez-Osorio
- Unidad de Genómica y Bioinformática, Departamento de Ciencias Biológicas, Centro Universitario Regional Litoral Norte, Universidad de la República, Rivera 1350, Salto 50000, Uruguay;
| | - Carolina Viñoles
- Centro de Salud Reproductiva de Rumiantes en Sistemas Agroforestales, Centro Universitario Regional Noreste, Universidad de la República, Ruta 26, km 408, Cerro Largo 37000, Uruguay;
| |
Collapse
|
4
|
Fusani P, Aiello N, Shachter A, Dudai N. Volatile Composition Variability of Arnica montana Wild Populations of Trentino-Alto Adige, Italy, Determined by Headspace-Solid Phase Microextraction. Chem Biodivers 2021; 19:e202100593. [PMID: 34755931 DOI: 10.1002/cbdv.202100593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 11/09/2021] [Indexed: 11/10/2022]
Abstract
Arnica montana is a plant distributed in most of Europe, including the Alpine arc and Apennines in Italy, and traditionally used worldwide for medicinal properties. Twelve natural populations of the species from Trentino-Alto Adige, Italy, were characterized using Headspace-Solid Phase Microextraction analysis for their volatile profile. Fifty-one compounds were detected in flower heads, the most abundant being (E)-Caryophyllene (23.4 %), 2,2,4,6,6-Pentamethylheptane (8.3 %), α- trans-Bergamotene (7.2 %), Germacrene D (5.7 %), and Hexanal (5.3 %). A multivariate analysis performed on the ten most abundant compounds grouped these investigated accessions into five main clusters. Three clusters, comprising together five accessions, were linked to the geographical origin of two collection sites. This work is a complete characterization of volatiles of the species by SPME analysis reported to date. Furthermore, results suggest that the species' volatile profile can be linked to the geographical origin of the natural populations and, therefore, represent a tool for evaluating biodiversity within the species.
Collapse
Affiliation(s)
- Pietro Fusani
- Council for Agricultural Research and Economics, Research Centre for Forestry and Wood, piazza Nicolini 6, 38123, Trento, Italy
| | - Nicola Aiello
- Council for Agricultural Research and Economics, Research Centre for Forestry and Wood, piazza Nicolini 6, 38123, Trento, Italy
| | - Alona Shachter
- Unit of Aromatic and Medicinal Plants, Newe Ya'ar Research Center, Agricultural Research Organization, Ramat-Yishay, IL-30095, Israel
| | - Nativ Dudai
- Unit of Aromatic and Medicinal Plants, Newe Ya'ar Research Center, Agricultural Research Organization, Ramat-Yishay, IL-30095, Israel
| |
Collapse
|