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Wasserzug Pash P, Karavani G, Reich E, Zecharyahu L, Kay Z, Bauman D, Mordechai-Daniel T, Imbar T, Klutstein M. Pre-pubertal oocytes harbor altered histone modifications and chromatin configuration. Front Cell Dev Biol 2023; 10:1060440. [PMID: 36704200 PMCID: PMC9871384 DOI: 10.3389/fcell.2022.1060440] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 12/22/2022] [Indexed: 01/12/2023] Open
Abstract
Pre-pubertal oocytes are still dormant. They are arrested in a GV state and do not undergo meiotic divisions naturally. A multitude of molecular pathways are changed and triggered upon initiation of puberty. It is not yet clear which epigenetic events occur in oocytes upon pubertal transition, and how significant these epigenetic events may be. We evaluated epigenetic marker levels in mouse pre-pubertal and post-pubertal female oocytes. In addition, we evaluated H3K9me2 levels in human oocytes collected from fertility preservation patients, comparing the levels between pre-pubertal patients and post-pubertal patients. The chromatin structure shows a lower number of chromocenters in mouse post-pubertal oocytes in comparison to pre-pubertal oocytes. All heterochromatin marker levels checked (H3K9me2, H3K27me3, H4K20me1) significantly rise across the pubertal transition. Euchromatin markers vary in their behavior. While H3K4me3 levels rise with the pubertal transition, H3K27Ac levels decrease with the pubertal transition. Treatment with SRT1720 [histone deacetylase (HDAC) activator] or overexpression of heterochromatin factors does not lead to increased heterochromatin in pre-pubertal oocytes. However, treatment of pre-pubertal oocytes with follicle-stimulating hormone (FSH) for 24 h - changes their chromatin structure to a post-pubertal configuration, lowers the number of chromocenters and elevates their histone methylation levels, showing that hormones play a key role in chromatin regulation of pubertal transition. Our work shows that pubertal transition leads to reorganization of oocyte chromatin and elevation of histone methylation levels, thus advancing oocyte developmental phenotype. These results provide the basis for finding conditions for in-vitro maturation of pre-pubertal oocytes, mainly needed to artificially mature oocytes of young cancer survivors for fertility preservation purposes.
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Affiliation(s)
- Pe’era Wasserzug Pash
- Institute of Biomedical and Oral research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Gilad Karavani
- Fertility Preservation Service, Department of Obstetrics and Gynecology, Hadassah Ein Kerem Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Eli Reich
- Institute of Biomedical and Oral research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Lital Zecharyahu
- Institute of Biomedical and Oral research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Zehava Kay
- Institute of Biomedical and Oral research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Dvora Bauman
- Fertility Preservation Service, Department of Obstetrics and Gynecology, Hadassah Ein Kerem Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Talya Mordechai-Daniel
- Fertility Preservation Service, Department of Obstetrics and Gynecology, Hadassah Ein Kerem Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Tal Imbar
- Fertility Preservation Service, Department of Obstetrics and Gynecology, Hadassah Ein Kerem Medical Center and Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel,*Correspondence: Tal Imbar, ; Michael Klutstein,
| | - Michael Klutstein
- Institute of Biomedical and Oral research, Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel,*Correspondence: Tal Imbar, ; Michael Klutstein,
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Haviv Y, Merimsky B, Kay Z, Sharav Y, Czerninski R, Brotman Y, Klutstein M, Aframian DJ. Topical tretinoin treatment for burning mouth syndrome: a pilot study. Quintessence Int 2022; 53:860-867. [PMID: 35976748 DOI: 10.3290/j.qi.b3315031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
OBJECTIVES Burning mouth syndrome is an intraoral chronic pain condition characterized by a moderate to severe sensation of burning from the oral mucosa. No clinical signs are found and there is no efficient treatment. METHOD AND MATERIALS This pilot study included 10 women that were resistant to other previous treatments or noncompliant to systemic medications. Patients were asked to apply tretinoin gel 0.05% on their tongues twice daily for 14 days. Treatment effectiveness was assessed by completing a pre-study psychologic questionnaire and recording a daily wellbeing and pain log. RESULTS Significant pain-score decrease in 50% of the patients (delta numerical rating score -3.15 ± 3.02, P value = .005) was recorded. This finding was in concordance with the verbal statements including major quality-of-life improvement (P value = .05), without any treatment positive or negative predictive factors. CONCLUSIONS Topical tretinoin exhibits potential efficacy in patients with treatment resistant burning mouth syndrome and may also be used as a primary treatment modality.
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