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Pandya RK, Jijo A, Cheredath A, Uppangala S, Salian SR, Lakshmi VR, Kumar P, Kalthur G, Gupta S, Adiga SK. Differential sperm histone retention in normozoospermic ejaculates of infertile men negatively affects sperm functional competence and embryo quality. Andrology 2024; 12:881-890. [PMID: 37801310 DOI: 10.1111/andr.13541] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 09/16/2023] [Accepted: 09/26/2023] [Indexed: 10/07/2023]
Abstract
BACKGROUND The unique epigenetic architecture that sperm cells acquire during spermiogenesis by retaining <15% of either canonical or variant histone proteins in their genome is essential for normal embryogenesis. Whilst heterogeneous levels of retained histones are found in morphologically normal spermatozoa, their effect on reproductive outcomes is not fully understood. METHODS Processed spermatozoa (n = 62) were tested for DNA integrity by sperm chromatin dispersion assay, and retained histones were extracted and subjected to dot-blot analysis. The impact of retained histone modifications in normozoospermic patients on sperm functional characteristics, embryo quality, metabolic signature in embryo spent culture medium and pregnancy outcome was studied. RESULTS Dot-blot analysis showed heterogeneous levels of retained histones in the genome of normozoospermic ejaculates. Post-wash sperm yield was affected by an increase in H3K27Me3 and H4K20Me3 levels in the sperm chromatin (p < 0.05). Also, spermatozoa with higher histone H3 retention had increased DNA damage (p < 0.05). Spermatozoa from these cohorts, when injected into donor oocytes, correlated to a significant decrease in the fertilisation rate with an increase in sperm histone H3 (p < 0.05) and H3K27Me3 (p < 0.01). An increase in histone H3 negatively affected embryo quality (p < 0.01) and clinical pregnancy outcome post-embryo transfer (p < 0.05). On the other hand, spent culture medium metabolites assessed by high-resolution (800 MHz) nuclear magnetic resonance showed an increased intensity of the amino acid methionine in the non-pregnant group than in the pregnant group (p < 0.05) and a negative correlation with sperm histone H3 in the pregnant group (p < 0.05). DISCUSSION AND CONCLUSION Histone retention in spermatozoa can be one of the factors behind the development of idiopathic male infertility. Such spermatozoa may influence embryonic behaviour and thereby affect the success rate of assisted reproductive technology procedures. These results, although descriptive in nature, warrant further research to address the underlying mechanisms behind these clinically important observations.
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Affiliation(s)
- Riddhi Kirit Pandya
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Ameya Jijo
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Aswathi Cheredath
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Shubhashree Uppangala
- Division of Reproductive Genetics, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Sujith Raj Salian
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Vani R Lakshmi
- Department of Data Science, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | - Pratap Kumar
- Department of Reproductive Medicine and Surgery, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Guruprasad Kalthur
- Division of Reproductive Biology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Sanjay Gupta
- KS313, Epigenetics and Chromatin Biology Group, Gupta Lab, Cancer Research Institute, Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Centre, Navi Mumbai, India
| | - Satish Kumar Adiga
- Centre of Excellence in Clinical Embryology, Department of Reproductive Science, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
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Uppangala S, Daddangadi A, Joseph JS, Salian SR, Pandya RK, Kalthur G, Adiga SK. Stage-specific response in early mouse embryos exposed to prednisolone in vitro. J Endocrinol 2021; 248:237-247. [PMID: 33289686 DOI: 10.1530/joe-20-0382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/14/2020] [Accepted: 12/02/2020] [Indexed: 11/08/2022]
Abstract
Corticosteroids are increasingly being used during the peri-implantation period to treat women with repeated IVF failure and recurrent miscarriage. However, the direct effects of prednisolone (PRDL), one of the commonly used corticosteroids on early embryo development is not understood. To mimic the possible clinical scenario and to understand the embryonic response to direct PRDL exposure, this pilot study was conducted in a mouse model. Cleavage stage embryos exposed to 3 and 30 µM PRDL in vitro were assessed for peri-implantation developmental potential, genetic integrity, inner cell mass (ICM) proliferation and pluripotency markers in the proliferated ICM cells. Exposure to 30 µM PRDL delayed the embryonic progression beyond compaction (P < 0.05) in comparison to vehicle control and, had reduced total cell number (P < 0.001) than all other groups. In addition, 30 µM PRDL exposure resulted in poor hatching potential (P < 0.05) and increased apoptosis in blastocysts (P < 0.05) compared to 3 µM PRDL. On the other hand, completely formed ICM outgrowths were significantly higher (P < 0.05) in 3 µM PRDL compared to control. However, no significant differences were observed in the expression of pluripotency genes. In conclusion, the trend observed in embryos exposed to PRDL in vitro provides important information concerning the use of this drug when treating patients at the peri-implantation phase of IVF cycles. However, the clinical value of this observation on human embryo development needs further research.
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Affiliation(s)
- Shubhashree Uppangala
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Akshatha Daddangadi
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Jeena Susan Joseph
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Sujit Raj Salian
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Riddhi Kirit Pandya
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Guruprasad Kalthur
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Satish Kumar Adiga
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
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Salian SR, Pandya RK, Laxminarayana SLK, Krishnamurthy H, Cheredath A, Tholeti P, Uppangala S, Kalthur G, Majumdar S, Schlatt S, Adiga SK. Impact of Temperature and Time Interval Prior to Immature Testicular-Tissue Organotypic Culture on Cellular Niche. Reprod Sci 2020; 28:2161-2173. [PMID: 33319342 PMCID: PMC8289760 DOI: 10.1007/s43032-020-00396-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 09/28/2020] [Accepted: 11/12/2020] [Indexed: 02/06/2023]
Abstract
Cryopreservation of immature-testicular-tissue (ITT) prior to gonadotoxic treatment, while experimental, is the only recommended option for fertility preservation in prepubertal boys. The handling and manipulation of ITT before cryopreservation could influence the functionality of cells during fertility restoration, which this study explored by evaluating cellular niche and quality of mouse ITT subjected to various temperatures and time durations in vitro. ITT from 6-day-old mice were handled at ultraprofound-hypothermic, profound-hypothermic, and mild-warm-ischemic temperatures for varying time periods prior to 14-day organotypic culture. Viability, functionality, synaptonemal complex and chromatin remodeling markers were assessed. Results have shown that cell viability, testosterone level, and in vitro proliferation ability did not change when ITT were held at ultraprofound-hypothermic-temperature up to 24 h, whereas cell viability was significantly reduced (P < 0.01), when held at profound-hypothermic-temperature for 24 h before culture. Further, cell viability and testosterone levels in cultured cells from profound-hypothermic group were comparable to corresponding ultraprofound-hypothermic group but with moderate reduction in postmeiotic cells (P < 0.01). In conclusion, holding ITT at ultraprofound-hypothermic-temperature is most suitable for organotypic culture, whereas short-term exposure at profound-hypothermic-temperature may compromise postmeiotic germ cell yield post in vitro culture. This data, albeit in mouse model, will have immense value in human prepubertal fertility restoration research.
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Affiliation(s)
- Sujith Raj Salian
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Riddhi Kirit Pandya
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | | | | | - Aswathi Cheredath
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Prathima Tholeti
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Shubhashree Uppangala
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Guruprasad Kalthur
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Subeer Majumdar
- National Institute of Animal Biotechnology, Hyderabad, India
| | - Stefan Schlatt
- Centre of Reproductive Medicine and Andrology, Albert-Schweitzer Campus 11, 48149, Münster, Germany
| | - Satish Kumar Adiga
- Department of Clinical Embryology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India.
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