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Singh PP, Kumar S, Pasupuleti N, Weerasooriya P, van Driem G, Tennekoon KH, Rai N, Chaubey G, Ranasinghe R. Reconstructing the population history of the Sinhalese, the major ethnic group in Śrī Laṅkā. iScience 2023; 26:107797. [PMID: 37744037 PMCID: PMC10514440 DOI: 10.1016/j.isci.2023.107797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 07/29/2023] [Accepted: 08/29/2023] [Indexed: 09/26/2023] Open
Abstract
The Sinhalese are the major ethnic group in Śrī Laṅkā, inhabiting nearly the whole length and breadth of the island. They speak an Indo-European language of the Indo-Iranian branch, which is held to originate in northwestern India, going back to at least the fifth century BC. Previous genetic studies on low-resolution markers failed to infer the genomic history of the Sinhalese population. Therefore, we have performed a high-resolution fine-grained genetic study of the Sinhalese population and, in the broader context, we attempted to reconstruct the genetic history of Śrī Laṅkā. Our allele-frequency-based analysis showed a tight cluster of Sinhalese and Tamil populations, suggesting strong gene flow beyond the boundary of ethnicity and language. Interestingly, the haplotype-based analysis preserved a trace of the North Indian affiliation to the Sinhalese population. Overall, in the South Asian context, Śrī Laṅkān ethnic groups are genetically more homogeneous than others.
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Affiliation(s)
- Prajjval Pratap Singh
- Cytogenetics Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, India
| | - Sachin Kumar
- Ancient DNA Lab, Birbal Sahni Institute of Palaeosciences, Lucknow 226607, India
| | | | - P.R. Weerasooriya
- Institute of Biochemistry, Molecular Biology and Biotechnology, University of Colombo, No. 90, Cumaratunga Munidasa Mawatha, Colombo 03 00300, Śrī Laṅkā
| | - George van Driem
- Institut für Sprachwissenschaft, Universität Bern, Länggassstrasse 49, 3012 Bern, Switzerland
| | - Kamani H. Tennekoon
- Institute of Biochemistry, Molecular Biology and Biotechnology, University of Colombo, No. 90, Cumaratunga Munidasa Mawatha, Colombo 03 00300, Śrī Laṅkā
| | - Niraj Rai
- Ancient DNA Lab, Birbal Sahni Institute of Palaeosciences, Lucknow 226607, India
| | - Gyaneshwer Chaubey
- Cytogenetics Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221005, India
| | - R. Ranasinghe
- Institute of Biochemistry, Molecular Biology and Biotechnology, University of Colombo, No. 90, Cumaratunga Munidasa Mawatha, Colombo 03 00300, Śrī Laṅkā
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Stehle JR, Weeks ME, Lin K, Willingham MC, Hicks AM, Timms JF, Cui Z. Mass spectrometry identification of circulating alpha-1-B glycoprotein, increased in aged female C57BL/6 mice. Biochim Biophys Acta Gen Subj 2006; 1770:79-86. [PMID: 16945486 DOI: 10.1016/j.bbagen.2006.06.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2006] [Revised: 06/12/2006] [Accepted: 06/13/2006] [Indexed: 11/27/2022]
Abstract
In this study, we surveyed the profiles of mouse circulating proteins by 2-dimensional SDS-PAGE in different strains, sexes and ages. Among visible protein spots on 2-D gels with silver-staining, we identified a unique set of 7 seemingly-related proteins whose levels were consistently elevated in older C57BL/6 female mice. This set of 7 proteins was absent in C57BL/6 males or in BALB/c mice of either sex of any age. When C57BL/6 female mice were crossed with BALB/c males, the age-related increase of these proteins became sporadic and not linear in the F1 offspring. All 7 spots of this protein group were picked and subjected to identification by mass spectrometric analysis after tryptic digestion. The results showed that all 7 spots were different isoforms of alpha(1)B-glycoprotein with different degrees of post-translational modifications, such as phosphorylation. These results suggest that alpha(1)B-glycoprotein changes in mice in a sex and age dependent manner.
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Affiliation(s)
- John R Stehle
- Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA
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