1
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Wolfsberger W, Chhugani K, Shchubelka K, Frolova A, Salyha Y, Zlenko O, Arych M, Dziuba D, Parkhomenko A, Smolanka V, Gümüş ZH, Sezgin E, Diaz-Lameiro A, Toth VR, Maci M, Bortz E, Kondrashov F, Morton PM, Łabaj PP, Romero V, Hlávka J, Mangul S, Oleksyk TK. Scientists without borders: lessons from Ukraine. Gigascience 2022; 12:giad045. [PMID: 37496156 PMCID: PMC10372202 DOI: 10.1093/gigascience/giad045] [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: 05/05/2023] [Revised: 05/31/2023] [Accepted: 06/01/2023] [Indexed: 07/28/2023] Open
Abstract
Conflicts and natural disasters affect entire populations of the countries involved and, in addition to the thousands of lives destroyed, have a substantial negative impact on the scientific advances these countries provide. The unprovoked invasion of Ukraine by Russia, the devastating earthquake in Turkey and Syria, and the ongoing conflicts in the Middle East are just a few examples. Millions of people have been killed or displaced, their futures uncertain. These events have resulted in extensive infrastructure collapse, with loss of electricity, transportation, and access to services. Schools, universities, and research centers have been destroyed along with decades' worth of data, samples, and findings. Scholars in disaster areas face short- and long-term problems in terms of what they can accomplish now for obtaining grants and for employment in the long run. In our interconnected world, conflicts and disasters are no longer a local problem but have wide-ranging impacts on the entire world, both now and in the future. Here, we focus on the current and ongoing impact of war on the scientific community within Ukraine and from this draw lessons that can be applied to all affected countries where scientists at risk are facing hardship. We present and classify examples of effective and feasible mechanisms used to support researchers in countries facing hardship and discuss how these can be implemented with help from the international scientific community and what more is desperately needed. Reaching out, providing accessible training opportunities, and developing collaborations should increase inclusion and connectivity, support scientific advancements within affected communities, and expedite postwar and disaster recovery.
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Affiliation(s)
- Walter Wolfsberger
- Department of Biological Sciences, Oakland University,
Rochester, MI 48309-4479, USA
| | - Karishma Chhugani
- Department of Clinical Pharmacy, USC Alfred E. Mann School of Pharmacy and
Pharmaceutical Sciences, University of Southern California,
Los Angeles, CA 90033, USA
| | - Khrystyna Shchubelka
- Department of Biological Sciences, Oakland University,
Rochester, MI 48309-4479, USA
| | - Alina Frolova
- Institute of Molecular Biology and Genetics of National Academy of Sciences
of Ukraine, Kyiv Academic University, Kyiv 03143,
Ukraine
| | - Yuriy Salyha
- Institute of Animal Biology, National Academy of Agrarian Sciences (NAAS)
of Ukraine, Lviv 79034, Ukraine
| | - Oksana Zlenko
- National Scientific Center “Institute of Experimental and Clinical
Veterinary Medicine,” Kharkiv 61023, Ukraine
| | - Mykhailo Arych
- Institute of Economics and Management, National University of Food
Technologies (NUFT) of Ukraine, Kyiv 01601,
Ukraine
| | - Dmytro Dziuba
- Department of Anesthesiology and Intensive Care, P.L. Shpyk
NUHC Ukraine, Kyiv 04112, Ukraine
| | - Andrii Parkhomenko
- Department of Finance and Business Economics, Marshall School
of Business, University of Southern California, Los Angeles, CA 90089, USA
| | - Volodymyr Smolanka
- Department of Medicine, Uzhhorod National University,
Uzhhorod 88000, Ukraine
| | - Zeynep H Gümüş
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at
Mount Sinai, New York, NY 10029, USA
| | - Efe Sezgin
- Department of Food Engineering, Izmir Institute of
Technology, Urla, Izmir 35430, Turkey
| | - Alondra Diaz-Lameiro
- Department of Biology, University of Puerto Rico at Mayagüez,
Mayagüez 00681, Puerto
Rico
| | - Viktor R Toth
- Aquatic Botany and Microbial Ecology Research Group, Balaton Limnological
Research Institute, Tihany 8237, Hungary
| | - Megi Maci
- Stritch School of Medicine, Loyola University Chicago,
Maywood, IL 60153, USA
| | - Eric Bortz
- Department of Biological Sciences, University of Alaska,
Anchorage, AK 99508, USA
| | - Fyodor Kondrashov
- Institute of Science and Technology Austria,
Klosterneuburg 3400, Austria
| | - Patricia M Morton
- Department of Sociology, Department of Public Health, Wayne State
University, Detroit, MI 48202, USA
| | - Paweł P Łabaj
- Małopolska Centre of Biotechnology, Jagiellonian University,
Kraków 30-348, Poland
| | - Veronika Romero
- Department of Neurobiology, University of Utah, Salt Lake
City, UT 84112, USA
| | - Jakub Hlávka
- Price School of Public Policy, University of Southern
California, Los Angeles, CA 90089-3333, USA
- Masaryk University, Brno 6017, Czech Republic
| | - Serghei Mangul
- Department of Clinical Pharmacy, USC Alfred E. Mann School of Pharmacy and
Pharmaceutical Sciences, University of Southern California,
Los Angeles, CA 90033, USA
- Department of Computational Biology, University of Southern
California, Los Angeles, CA 90033, USA
| | - Taras K Oleksyk
- Department of Biological Sciences, Oakland University,
Rochester, MI 48309-4479, USA
- Department of Biology, Uzhhorod National University, Uzhhorod
88000, Ukraine
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Chhugani K, Frolova A, Salyha Y, Fiscutean A, Zlenko O, Reinsone S, Wolfsberger WW, Ivashchenko OV, Maci M, Dziuba D, Parkhomenko A, Bortz E, Kondrashov F, Łabaj PP, Romero V, Hlávka J, Oleksyk TK, Mangul S. Remote opportunities for scholars in Ukraine. Science 2022; 378:1285-1286. [PMID: 36548425 DOI: 10.1126/science.adg0797] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Karishma Chhugani
- Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA 90089, USA
| | - Alina Frolova
- Institute of Molecular Biology and Genetics of National Academy of Sciences of Ukraine, Kyiv, Ukraine.,Kyiv Academic University, Kyiv, Ukraine
| | - Yuriy Salyha
- Institute of Animal Biology NAAS, 79034 Lviv, Ukraine
| | - Andrada Fiscutean
- Faculty of Journalism and Communication Studies, University of Bucharest, Bucharest, Romania
| | - Oksana Zlenko
- National Scientific Center, "Institute of Experimental and Clinical Veterinary Medicine," Kharkiv, Ukraine
| | - Sanita Reinsone
- Institute of Literature, Folklore, and Art, University of Latvia, Riga LV-1004, Latvia
| | - Walter W Wolfsberger
- Department of Biological Sciences, Oakland University, Rochester, MI 48309-4479, USA
| | | | - Megi Maci
- Stritch School of Medicine, Loyola University Chicago, Maywood, IL 60153, USA
| | - Dmytro Dziuba
- Department of Anesthesiology and Intensive Care, P.L. Shupyk National Healthcare University, Kyiv, Ukraine
| | - Andrii Parkhomenko
- Department of Finance and Business Economics, Marshall School of Business, University of Southern California, Los Angeles, CA 90089, USA
| | - Eric Bortz
- Department of Biological Sciences, University of Alaska Anchorage, Anchorage, AK 99508, USA
| | - Fyodor Kondrashov
- Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria
| | - Paweł P Łabaj
- Małopolska Centre of Biotechnology, Jagiellonian University, Kraków, Poland
| | - Veronika Romero
- Department of Neurobiology, University of Utah, Salt Lake City, UT 84112, USA
| | - Jakub Hlávka
- Price School of Public Policy, University of Southern California, Los Angeles, CA 90089-3333, USA
| | - Taras K Oleksyk
- Department of Biological Sciences, Oakland University, Rochester, MI 48309-4479, USA.,Department of Biology, Uzhhorod National University, 88000 Uzhhorod, Ukraine
| | - Serghei Mangul
- Department of Clinical Pharmacy, University of Southern California Alfred E. Mann School of Pharmacy and Pharmaceutical Sciences, Los Angeles, CA 90089, USA.,Department of Quantitative and Computational Biology, University of Southern California Dornsife College of Letters, Arts, and Sciences, Los Angeles, CA 90089, USA
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3
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Oleksyk TK, Wolfsberger WW, Schubelka K, Mangul S, O'Brien SJ. The Pioneer Advantage: Filling the blank spots on the map of genome diversity in Europe. Gigascience 2022; 11:6695081. [PMID: 36085557 PMCID: PMC9463063 DOI: 10.1093/gigascience/giac081] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/26/2022] [Accepted: 07/26/2022] [Indexed: 11/13/2022] Open
Abstract
Documenting genome diversity is important for the local biomedical communities and instrumental in developing precision and personalized medicine. Currently, tens of thousands of whole-genome sequences from Europe are publicly available, but most of these represent populations of developed countries of Europe. The uneven distribution of the available data is further impaired by the lack of data sharing. Recent whole-genome studies in Eastern Europe, one in Ukraine and one in Russia, demonstrated that local genome diversity and population structure from Eastern Europe historically had not been fully represented. An unexpected wealth of genomic variation uncovered in these studies was not so much a consequence of high variation within their population, but rather due to the "pioneer advantage." We discovered more variants because we were the first to prospect in the Eastern European genome pool. This simple comparison underscores the importance of removing the remaining geographic genome deserts from the rest of the world map of the human genome diversity.
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Affiliation(s)
- Taras K Oleksyk
- Uzhhorod National University, Uzhhorod, 88000, Ukraine.,Oakland University, Department of Biological Sciences, Rochester, 48309 MI 48309-4479, USA
| | - Walter W Wolfsberger
- Oakland University, Department of Biological Sciences, Rochester, 48309 MI 48309-4479, USA
| | - Khrystyna Schubelka
- Oakland University, Department of Biological Sciences, Rochester, 48309 MI 48309-4479, USA
| | - Serghei Mangul
- University of Southern California, USC School of Pharmacy, Los Angeles, CA 90089, USA
| | - Stephen J O'Brien
- Nova Southeastern University, Halmos College of Natural Sciences and Oceanography, Fort Lauderdale, FL 33314, USA
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4
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Wolfsberger WW, Ayala NM, Castro-Marquez SO, Irizarry-Negron VM, Potapchuk A, Shchubelka K, Potish L, Majeske AJ, Oliver LF, Lameiro AD, Martínez-Cruzado JC, Lindgren G, Oleksyk TK. Genetic diversity and selection in Puerto Rican horses. Sci Rep 2022; 12:515. [PMID: 35017609 PMCID: PMC8752667 DOI: 10.1038/s41598-021-04537-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 12/23/2021] [Indexed: 11/21/2022] Open
Abstract
Since the first Spanish settlers brought horses to America centuries ago, several local varieties and breeds have been established in the New World. These were generally a consequence of the admixture of the different breeds arriving from Europe. In some instances, local horses have been selectively bred for specific traits, such as appearance, endurance, strength, and gait. We looked at the genetics of two breeds, the Puerto Rican Non-Purebred (PRNPB) (also known as the "Criollo") horses and the Puerto Rican Paso Fino (PRPF), from the Caribbean Island of Puerto Rico. While it is reasonable to assume that there was a historic connection between the two, the genetic link between them has never been established. In our study, we started by looking at the genetic ancestry and diversity of current Puerto Rican horse populations using a 668 bp fragment of the mitochondrial DNA D-loop (HVR1) in 200 horses from 27 locations on the island. We then genotyped all 200 horses in our sample for the "gait-keeper" DMRT3 mutant allele previously associated with the paso gait especially cherished in this island breed. We also genotyped a subset of 24 samples with the Illumina Neogen Equine Community genome-wide array (65,000 SNPs). This data was further combined with the publicly available PRPF genomes from other studies. Our analysis show an undeniable genetic connection between the two varieties in Puerto Rico, consistent with the hypothesis that PRNPB horses represent the descendants of the original genetic pool, a mix of horses imported from the Iberian Peninsula and elsewhere in Europe. Some of the original founders of PRNRB population must have carried the "gait-keeper" DMRT3 allele upon arrival to the island. From this admixture, the desired traits were selected by the local people over the span of centuries. We propose that the frequency of the mutant "gait-keeper" allele originally increased in the local horses due to the selection for the smooth ride and other characters, long before the PRPF breed was established. To support this hypothesis, we demonstrate that PRNPB horses, and not the purebred PRPF, carry a signature of selection in the genomic region containing the DMRT3 locus to this day. The lack of the detectable signature of selection associated with the DMRT3 in the PRPF would be expected if this native breed was originally derived from the genetic pool of PRNPB horses established earlier and most of the founders already had the mutant allele. Consequently, selection specific to PRPF later focused on allels in other genes (including CHRM5, CYP2E1, MYH7, SRSF1, PAM, PRN and others) that have not been previously associated with the prized paso gait phenotype in Puerto Rico or anywhere else.
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Affiliation(s)
- Walter W Wolfsberger
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
- Biology Department, Uzhhorod National University, Uzhhorod, Ukraine
| | - Nikole M Ayala
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | - Stephanie O Castro-Marquez
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | | | - Antoliy Potapchuk
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | - Khrystyna Shchubelka
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
- Biology Department, Uzhhorod National University, Uzhhorod, Ukraine
| | - Ludvig Potish
- Department of Forestry, Uzhhorod National University, Uzhhorod, Ukraine
| | - Audrey J Majeske
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | - Luis Figueroa Oliver
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | - Alondra Diaz Lameiro
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | | | - Gabriella Lindgren
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Livestock Genetics, Department of Biosystems, KU Leuven, Leuven, Belgium
| | - Taras K Oleksyk
- Department of Biological Sciences, Oakland University, Rochester, MI, USA.
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico.
- Biology Department, Uzhhorod National University, Uzhhorod, Ukraine.
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5
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Kolchanova S, Komissarov A, Kliver S, Mazo-Vargas A, Afanador Y, Velez-Valentín J, de la Rosa RV, Castro-Marquez S, Rivera-Colon I, Majeske AJ, Wolfsberger WW, Hains T, Corvelo A, Martinez-Cruzado JC, Glenn TC, Robinson O, Koepfli KP, Oleksyk TK. Molecular Phylogeny and Evolution of Amazon Parrots in the Greater Antilles. Genes (Basel) 2021; 12:608. [PMID: 33924228 PMCID: PMC8074781 DOI: 10.3390/genes12040608] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 04/13/2021] [Accepted: 04/16/2021] [Indexed: 01/10/2023] Open
Abstract
Amazon parrots (Amazona spp.) colonized the islands of the Greater Antilles from the Central American mainland, but there has not been a consensus as to how and when this happened. Today, most of the five remaining island species are listed as endangered, threatened, or vulnerable as a consequence of human activity. We sequenced and annotated full mitochondrial genomes of all the extant Amazon parrot species from the Greater Antillean (A. leucocephala (Cuba), A. agilis, A. collaria (both from Jamaica), A. ventralis (Hispaniola), and A. vittata (Puerto Rico)), A. albifrons from mainland Central America, and A. rhodocorytha from the Atlantic Forest in Brazil. The assembled and annotated mitogenome maps provide information on sequence organization, variation, population diversity, and evolutionary history for the Caribbean species including the critically endangered A. vittata. Despite the larger number of available samples from the Puerto Rican Parrot Recovery Program, the sequence diversity of the A. vittata population in Puerto Rico was the lowest among all parrot species analyzed. Our data support the stepping-stone dispersal and speciation hypothesis that has started approximately 3.47 MYA when the ancestral population arrived from mainland Central America and led to diversification across the Greater Antilles, ultimately reaching the island of Puerto Rico 0.67 MYA. The results are presented and discussed in light of the geological history of the Caribbean and in the context of recent parrot evolution, island biogeography, and conservation. This analysis contributes to understating evolutionary history and empowers subsequent assessments of sequence variation and helps design future conservation efforts in the Caribbean.
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Affiliation(s)
- Sofiia Kolchanova
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, 199034 St. Petersburg, Russia;
| | - Alexey Komissarov
- Applied Genomics Laboratory, SCAMT Institute, ITMO University, 191002 St. Petersburg, Russia;
| | - Sergei Kliver
- Institute of Molecular and Cellular Biology, Siberian Branch of the Russian Academy of Sciences, 664033 Novosibirsk, Russia;
| | - Anyi Mazo-Vargas
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
| | - Yashira Afanador
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
| | - Jafet Velez-Valentín
- Conservation Program of the Puerto Rican Parrot, U.S. Fish and Wildlife Service, Rio Grande 00745, Puerto Rico;
| | - Ricardo Valentín de la Rosa
- The Recovery Program of the Puerto Rican Parrot at the Rio Abajo State Forest, Departamento de Recursos Naturales y Ambientales de Puerto Rico, Arecibo 00613, Puerto Rico;
| | - Stephanie Castro-Marquez
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
- Department of Biological Sciences, Oakland University, Rochester, MI 48307, USA
| | - Israel Rivera-Colon
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
| | - Audrey J. Majeske
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
- Department of Biological Sciences, Oakland University, Rochester, MI 48307, USA
| | - Walter W. Wolfsberger
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
- Department of Biological Sciences, Oakland University, Rochester, MI 48307, USA
- Department of Biology, Uzhhorod National University, 88000 Uzhhorod, Ukraine
| | - Taylor Hains
- Terra Wildlife Genomics, Washington, DC 20009, USA;
- Environmental Science and Policy, Johns Hopkins University, Washington, DC 20036, USA
| | | | - Juan-Carlos Martinez-Cruzado
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
| | - Travis C. Glenn
- Department of Environmental Health, The University of Georgia, Athens, GA 30602, USA;
| | | | - Klaus-Peter Koepfli
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, 199034 St. Petersburg, Russia;
- Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA 22630, USA
| | - Taras K. Oleksyk
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez 00682, Puerto Rico; (S.K.); (A.M.-V.); (Y.A.); (S.C.-M.); (I.R.-C.); (A.J.M.); (W.W.W.); (J.-C.M.-C.)
- Department of Biological Sciences, Oakland University, Rochester, MI 48307, USA
- Department of Biology, Uzhhorod National University, 88000 Uzhhorod, Ukraine
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Oleksyk TK, Wolfsberger WW, Weber AM, Shchubelka K, Oleksyk OT, Levchuk O, Patrus A, Lazar N, Castro-Marquez SO, Hasynets Y, Boldyzhar P, Neymet M, Urbanovych A, Stakhovska V, Malyar K, Chervyakova S, Podoroha O, Kovalchuk N, Rodriguez-Flores JL, Zhou W, Medley S, Battistuzzi F, Liu R, Hou Y, Chen S, Yang H, Yeager M, Dean M, Mills RE, Smolanka V. Genome diversity in Ukraine. Gigascience 2021; 10:6079618. [PMID: 33438729 PMCID: PMC7804371 DOI: 10.1093/gigascience/giaa159] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 08/04/2020] [Revised: 08/21/2020] [Accepted: 12/15/2020] [Indexed: 01/21/2023] Open
Abstract
Background The main goal of this collaborative effort is to provide genome-wide data for the previously underrepresented population in Eastern Europe, and to provide cross-validation of the data from genome sequences and genotypes of the same individuals acquired by different technologies. We collected 97 genome-grade DNA samples from consented individuals representing major regions of Ukraine that were consented for public data release. BGISEQ-500 sequence data and genotypes by an Illumina GWAS chip were cross-validated on multiple samples and additionally referenced to 1 sample that has been resequenced by Illumina NovaSeq6000 S4 at high coverage. Results The genome data have been searched for genomic variation represented in this population, and a number of variants have been reported: large structural variants, indels, copy number variations, single-nucletide polymorphisms, and microsatellites. To our knowledge, this study provides the largest to-date survey of genetic variation in Ukraine, creating a public reference resource aiming to provide data for medical research in a large understudied population. Conclusions Our results indicate that the genetic diversity of the Ukrainian population is uniquely shaped by evolutionary and demographic forces and cannot be ignored in future genetic and biomedical studies. These data will contribute a wealth of new information bringing forth a wealth of novel, endemic and medically related alleles.
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Affiliation(s)
- Taras K Oleksyk
- Department of Biological Sciences, Uzhhorod National University, 32 Voloshyna Str., Uzhhorod 88000, Ukraine.,Department of Biological Sciences,Oakland University, Dodge Hall, 118 Library Dr., Rochester, MI 48309, USA.,Departamento de Biología, Universidad de Puerto Rico, Mayagüez, PR 00682, USA
| | - Walter W Wolfsberger
- Department of Biological Sciences, Uzhhorod National University, 32 Voloshyna Str., Uzhhorod 88000, Ukraine.,Department of Biological Sciences,Oakland University, Dodge Hall, 118 Library Dr., Rochester, MI 48309, USA.,Departamento de Biología, Universidad de Puerto Rico, Mayagüez, PR 00682, USA
| | - Alexandra M Weber
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109, USA
| | - Khrystyna Shchubelka
- Department of Biological Sciences,Oakland University, Dodge Hall, 118 Library Dr., Rochester, MI 48309, USA.,Departamento de Biología, Universidad de Puerto Rico, Mayagüez, PR 00682, USA.,Department of Medicine, Uzhhorod National University, Uzhhorod 88000, Ukraine
| | - Olga T Oleksyk
- A. Novak Transcarpathian Regional Clinical Hospital, Uzhhorod 88000, Ukraine
| | | | | | | | - Stephanie O Castro-Marquez
- Department of Biological Sciences,Oakland University, Dodge Hall, 118 Library Dr., Rochester, MI 48309, USA.,Departamento de Biología, Universidad de Puerto Rico, Mayagüez, PR 00682, USA
| | - Yaroslava Hasynets
- Department of Biological Sciences, Uzhhorod National University, 32 Voloshyna Str., Uzhhorod 88000, Ukraine
| | - Patricia Boldyzhar
- Department of Medicine, Uzhhorod National University, Uzhhorod 88000, Ukraine
| | - Mikhailo Neymet
- Velyka Kopanya Family Hospital, Transcarpatia 90330, Ukraine
| | | | | | - Kateryna Malyar
- I.I.Mechnikov Dnipro Regional Clinical Hospital, Dnipro 49000, Ukraine
| | | | | | - Natalia Kovalchuk
- Rivne Regional Specialized Hospital of Radiation Protection, Rivne 33028, Ukraine
| | | | - Weichen Zhou
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109, USA
| | - Sarah Medley
- Department of Biological Sciences,Oakland University, Dodge Hall, 118 Library Dr., Rochester, MI 48309, USA
| | - Fabia Battistuzzi
- Department of Biological Sciences,Oakland University, Dodge Hall, 118 Library Dr., Rochester, MI 48309, USA
| | - Ryan Liu
- BGI Shenzhen, Shenzhen, 518083, China
| | - Yong Hou
- BGI Shenzhen, Shenzhen, 518083, China
| | - Siru Chen
- BGI Shenzhen, Shenzhen, 518083, China
| | | | - Meredith Yeager
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| | - Michael Dean
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| | - Ryan E Mills
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Human Genetics, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Volodymyr Smolanka
- Department of Medicine, Uzhhorod National University, Uzhhorod 88000, Ukraine
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7
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Zhernakova DV, Brukhin V, Malov S, Oleksyk TK, Koepfli KP, Zhuk A, Dobrynin P, Kliver S, Cherkasov N, Tamazian G, Rotkevich M, Krasheninnikova K, Evsyukov I, Sidorov S, Gorbunova A, Chernyaeva E, Shevchenko A, Kolchanova S, Komissarov A, Simonov S, Antonik A, Logachev A, Polev DE, Pavlova OA, Glotov AS, Ulantsev V, Noskova E, Davydova TK, Sivtseva TM, Limborska S, Balanovsky O, Osakovsky V, Novozhilov A, Puzyrev V, O'Brien SJ. Genome-wide sequence analyses of ethnic populations across Russia. Genomics 2019; 112:442-458. [PMID: 30902755 DOI: 10.1016/j.ygeno.2019.03.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 03/15/2019] [Indexed: 12/22/2022]
Abstract
The Russian Federation is the largest and one of the most ethnically diverse countries in the world, however no centralized reference database of genetic variation exists to date. Such data are crucial for medical genetics and essential for studying population history. The Genome Russia Project aims at filling this gap by performing whole genome sequencing and analysis of peoples of the Russian Federation. Here we report the characterization of genome-wide variation of 264 healthy adults, including 60 newly sequenced samples. People of Russia carry known and novel genetic variants of adaptive, clinical and functional consequence that in many cases show allele frequency divergence from neighboring populations. Population genetics analyses revealed six phylogeographic partitions among indigenous ethnicities corresponding to their geographic locales. This study presents a characterization of population-specific genomic variation in Russia with results important for medical genetics and for understanding the dynamic population history of the world's largest country.
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Affiliation(s)
- Daria V Zhernakova
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Vladimir Brukhin
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Sergey Malov
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; Department of Mathematics, St. Petersburg Electrotechnical University, St. Petersburg, Russian Federation
| | - Taras K Oleksyk
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico; Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA
| | - Klaus Peter Koepfli
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; National Zoological Park, Smithsonian Conservation Biology Institute, Washington, DC, USA
| | - Anna Zhuk
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; Vavilov Institute of General Genetics, Russian Academy of Sciences, St. Petersburg Branch, St. Petersburg, Russian Federation
| | - Pavel Dobrynin
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; National Zoological Park, Smithsonian Conservation Biology Institute, Washington, DC, USA
| | - Sergei Kliver
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Nikolay Cherkasov
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Gaik Tamazian
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Mikhail Rotkevich
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Ksenia Krasheninnikova
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Igor Evsyukov
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Sviatoslav Sidorov
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Anna Gorbunova
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russian Federation
| | - Ekaterina Chernyaeva
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Andrey Shevchenko
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Sofia Kolchanova
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; Biology Department, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | - Alexei Komissarov
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Serguei Simonov
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Alexey Antonik
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Anton Logachev
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Dmitrii E Polev
- Centre Biobank, Research Park, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Olga A Pavlova
- Centre Biobank, Research Park, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Andrey S Glotov
- Laboratory of biobanking and genomic medicine of Institute of translation biomedicine, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Vladimir Ulantsev
- Computer Technologies Laboratory, ITMO University, St. Petersburg, Russian Federation
| | - Ekaterina Noskova
- Computer Technologies Laboratory, ITMO University, St. Petersburg, Russian Federation; JetBrains Research, St. Petersburg, Russian Federation
| | - Tatyana K Davydova
- Federal State Budgetary Scietific Institution, "Yakut science center of complex medical problems", Yakutsk, Russian Federation
| | - Tatyana M Sivtseva
- Institute of Health, North-Eastern Federal University, Yakutsk, Russian Federation
| | - Svetlana Limborska
- Department of Molecular Bases of Human Genetics, Institute of Molecular Genetics, Russian Academy of Sciences, Moscow, Russian Federation
| | - Oleg Balanovsky
- Vavilov Institute of General Genetics, Russian Academy of Sciences, Moscow, Russian Federation; Research Centre for Medical Genetics, Moscow, Russian Federation; Biobank of North Eurasia, Moscow, Russian Federation
| | - Vladimir Osakovsky
- Institute of Health, North-Eastern Federal University, Yakutsk, Russian Federation
| | - Alexey Novozhilov
- Department of Ethnography and Anthropology, St. Petersburg State University, St. Petersburg, Russian Federation
| | - Valery Puzyrev
- Research Institute of Medical Genetics, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk, Russian Federation
| | - Stephen J O'Brien
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russian Federation; Guy Harvey Oceanographic Center, Halmos College of Natural Sciences and Oceanography, Nova Southeastern University, 8000 North Ocean Drive, Ft Lauderdale, Florida 33004, USA.
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8
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Kolchanova S, Kliver S, Komissarov A, Dobrinin P, Tamazian G, Grigorev K, Wolfsberger WW, Majeske AJ, Velez-Valentin J, Valentin de la Rosa R, Paul-Murphy JR, Guzman DSM, Court MH, Rodriguez-Flores JL, Martínez-Cruzado JC, Oleksyk TK. Genomes of Three Closely Related Caribbean Amazons Provide Insight for Species History and Conservation. Genes (Basel) 2019; 10:E54. [PMID: 30654561 PMCID: PMC6356210 DOI: 10.3390/genes10010054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/13/2018] [Accepted: 01/08/2019] [Indexed: 11/17/2022] Open
Abstract
Islands have been used as model systems for studies of speciation and extinction since Darwin published his observations about finches found on the Galapagos. Amazon parrots inhabiting the Greater Antillean Islands represent a fascinating model of species diversification. Unfortunately, many of these birds are threatened as a result of human activity and some, like the Puerto Rican parrot, are now critically endangered. In this study we used a combination of de novo and reference-assisted assembly methods, integrating it with information obtained from related genomes to perform genome reconstruction of three amazon species. First, we used whole genome sequencing data to generate a new de novo genome assembly for the Puerto Rican parrot (Amazona vittata). We then improved the obtained assembly using transcriptome data from Amazona ventralis and used the resulting sequences as a reference to assemble the genomes Hispaniolan (A. ventralis) and Cuban (Amazona leucocephala) parrots. Finally, we, annotated genes and repetitive elements, estimated genome sizes and current levels of heterozygosity, built models of demographic history and provided interpretation of our findings in the context of parrot evolution in the Caribbean.
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Affiliation(s)
- Sofiia Kolchanova
- Department of Biology, University of Puerto Rico at Mayaguez, Mayaguez, PR 00680, USA.
- Department of Biology, University of Konstanz, 78464 Konstanz, Germany.
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, 199034 St. Petersburg, Russia.
| | - Sergei Kliver
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, 199034 St. Petersburg, Russia.
| | - Aleksei Komissarov
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, 199034 St. Petersburg, Russia.
| | - Pavel Dobrinin
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, 199034 St. Petersburg, Russia.
| | - Gaik Tamazian
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, 199034 St. Petersburg, Russia.
| | - Kirill Grigorev
- Department of Biology, University of Puerto Rico at Mayaguez, Mayaguez, PR 00680, USA.
- Department of Genetic Medicine, Weill Cornell Medical College, New York, NY 10021, USA.
| | - Walter W Wolfsberger
- Department of Biology, University of Puerto Rico at Mayaguez, Mayaguez, PR 00680, USA.
- Department of Biological Sciences, Oakland University, 118 Library Drive, Rochester, MI 48309, USA.
- Department of Biological Sciences, Uzhhorod National University, 88000 Uzhhorod, Ukraine.
| | - Audrey J Majeske
- Department of Biology, University of Puerto Rico at Mayaguez, Mayaguez, PR 00680, USA.
- Beaumont BioBank, William Beaumont Hospital, Royal Oak, MI 48073, USA.
| | - Jafet Velez-Valentin
- Conservation Program of the Puerto Rican Parrot, U.S. Fish and Wildlife Service, Rio Grande, PR 00745, USA.
| | - Ricardo Valentin de la Rosa
- The Recovery Program of the Puerto Rican Parrot at the Rio Abajo State Forest, Departamento de Recursos Naturales y Ambientales de Puerto Rico, Arecibo, PR 00613, USA.
| | - Joanne R Paul-Murphy
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA.
| | - David Sanchez-Migallon Guzman
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA.
| | - Michael H Court
- Program in Individualized Medicine (PrIMe), Pharmacogenomics Laboratory, Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Washington State University, 100 Grimes Way, Pullman, WA 99164, USA.
| | | | | | - Taras K Oleksyk
- Department of Biology, University of Puerto Rico at Mayaguez, Mayaguez, PR 00680, USA.
- Department of Biological Sciences, Oakland University, 118 Library Drive, Rochester, MI 48309, USA.
- Department of Biological Sciences, Uzhhorod National University, 88000 Uzhhorod, Ukraine.
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9
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Diaz-Zabala HJ, Ortiz AP, Garland L, Jones K, Perez CM, Mora E, Arroyo N, Oleksyk TK, Echenique M, Matta JL, Dean M, Dutil J. A Recurrent BRCA2 Mutation Explains the Majority of Hereditary Breast and Ovarian Cancer Syndrome Cases in Puerto Rico. Cancers (Basel) 2018; 10:E419. [PMID: 30400234 PMCID: PMC6266560 DOI: 10.3390/cancers10110419] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/22/2018] [Accepted: 10/26/2018] [Indexed: 01/04/2023] Open
Abstract
Breast cancer is the most common cause of cancer diagnosis in women and is responsible for considerable mortality among the women of Puerto Rico. However, there are few studies in Puerto Rico on the genetic factors influencing risk. To determine the contribution of pathogenic mutations in BRCA1 and BRCA2, we sequenced these genes in 302 cases from two separate medical centers, who were not selected for age of onset or family history. We identified nine cases that are carriers of pathogenic germline mutation. This represents 2.9% of unselected cases and 5.6% of women meeting National Comprehensive Cancer Network (NCCN) criteria for BRCA testing. All of the identified pathogenic mutations were in the BRCA2 gene and the most common mutation is the p.Glu1308Ter (E1308X) mutation in BRCA2 found in eight out of nine cases, representing 89% of the pathogenic carriers. The E1308X mutation has been identified in breast and ovarian cancer families in Spain, and analysis of flanking DNA polymorphisms shows that all E1308X carriers occur on the same haplotype. This is consistent with BRCA2 E1308X being a founder mutation for the Puerto Rican population. These results will contribute to better inform genetic screening and counseling of breast and ovarian cancer cases in Puerto Rico and Puerto Rican populations in mainland United States.
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Affiliation(s)
- Hector J Diaz-Zabala
- Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Ponce, Ponce, PR 00716-2348, USA.
| | - Ana P Ortiz
- Cancer Control and Population Sciences Program, Comprehensive Cancer Center, University of Puerto Rico, San Juan, PR 00936-5067, USA.
| | - Lisa Garland
- Cancer Genomics Research Laboratory, Leidos Biomedical Research, Inc., Frederick, MD 21702, USA.
| | - Kristine Jones
- Cancer Genomics Research Laboratory, Leidos Biomedical Research, Inc., Frederick, MD 21702, USA.
| | - Cynthia M Perez
- Department of Biostatistics and Epidemiology, Graduate School of Public Health, University of Puerto Rico, San Juan, PR 00936-5067, USA.
| | - Edna Mora
- Department of Surgery, School of Medicine, University of Puerto Rico and University of Puerto Rico Comprehensive Cancer Center, San Juan, PR 00936-5067, USA.
| | - Nelly Arroyo
- Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Ponce, Ponce, PR 00716-2348, USA.
| | - Taras K Oleksyk
- Biology Department, Oakland University, Rochester, MI 48309-4454, USA.
- Department of Biology, University of Puerto Rico in Mayaguez, Mayaguez, PR 00681, USA.
| | - Miguel Echenique
- Cancer Center, Auxilio Mutuo Hospital, San Juan, PR 00936-5067, USA.
| | - Jaime L Matta
- Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Ponce, Ponce, PR 00716-2348, USA.
| | - Michael Dean
- Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Gaithersburg, MD 20877, USA.
| | - Julie Dutil
- Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Ponce, Ponce, PR 00716-2348, USA.
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10
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Grigorev K, Kliver S, Dobrynin P, Komissarov A, Wolfsberger W, Krasheninnikova K, Afanador-Hernández YM, Brandt AL, Paulino LA, Carreras R, Rodríguez LE, Núñez A, Brandt JR, Silva F, Hernández-Martich JD, Majeske AJ, Antunes A, Roca AL, O'Brien SJ, Martínez-Cruzado JC, Oleksyk TK. Innovative assembly strategy contributes to understanding the evolution and conservation genetics of the endangered Solenodon paradoxus from the island of Hispaniola. Gigascience 2018; 7:4931057. [PMID: 29718205 PMCID: PMC6009670 DOI: 10.1093/gigascience/giy025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 01/26/2018] [Accepted: 03/07/2018] [Indexed: 11/25/2022] Open
Abstract
Solenodons are insectivores that live in Hispaniola and Cuba. They form an isolated branch in the tree of placental mammals that are highly divergent from other eulipothyplan insectivores The history, unique biology, and adaptations of these enigmatic venomous species could be illuminated by the availability of genome data. However, a whole genome assembly for solenodons has not been previously performed, partially due to the difficulty in obtaining samples from the field. Island isolation and reduced numbers have likely resulted in high homozygosity within the Hispaniolan solenodon (Solenodon paradoxus). Thus, we tested the performance of several assembly strategies on the genome of this genetically impoverished species. The string graph-based assembly strategy seemed a better choice compared to the conventional de Bruijn graph approach due to the high levels of homozygosity, which is often a hallmark of endemic or endangered species. A consensus reference genome was assembled from sequences of 5 individuals from the southern subspecies (S. p. woodi). In addition, we obtained an additional sequence from 1 sample of the northern subspecies (S. p. paradoxus). The resulting genome assemblies were compared to each other and annotated for genes, with an emphasis on venom genes, repeats, variable microsatellite loci, and other genomic variants. Phylogenetic positioning and selection signatures were inferred based on 4,416 single-copy orthologs from 10 other mammals. We estimated that solenodons diverged from other extant mammals 73.6 million years ago. Patterns of single-nucleotide polymorphism variation allowed us to infer population demography, which supported a subspecies split within the Hispaniolan solenodon at least 300 thousand years ago.
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Affiliation(s)
- Kirill Grigorev
- Department of Biology, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | - Sergey Kliver
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia
| | - Pavel Dobrynin
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia
| | - Aleksey Komissarov
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia
| | - Walter Wolfsberger
- Department of Biology, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
- Biology Department, Uzhhorod National University, Uzhhorod, Ukraine
| | - Ksenia Krasheninnikova
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia
| | | | - Adam L Brandt
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Division of Natural Sciences, St. Norbert College, De Pere, Wisconsin, USA
| | - Liz A Paulino
- Instituto Tecnológico de Santo Domingo (INTEC), Santo Domingo, Dominican Republic
| | - Rosanna Carreras
- Instituto Tecnológico de Santo Domingo (INTEC), Santo Domingo, Dominican Republic
| | - Luis E Rodríguez
- Instituto Tecnológico de Santo Domingo (INTEC), Santo Domingo, Dominican Republic
| | - Adrell Núñez
- Department of Conservation and Science, Parque Zoologico Nacional (ZOODOM), Santo Domingo, Dominican Republic
| | - Jessica R Brandt
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Biology, Marian University, Fond du Lac, Wisconsin, USA
| | - Filipe Silva
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450–208 Porto, Portugal
- Department of Biology, Faculty of Sciences, University of Porto. Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - J David Hernández-Martich
- Instituto de Investigaciones Botánicas y Zoológicas, Universidad Autónoma de Santo Domingo, Santo Domingo, Dominican Republic
| | - Audrey J Majeske
- Department of Biology, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | - Agostinho Antunes
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450–208 Porto, Portugal
- Department of Biology, Faculty of Sciences, University of Porto. Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Alfred L Roca
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Stephen J O'Brien
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia
- Oceanographic Center, Nova Southeastern University, Fort Lauderdale, Florida, USA
| | | | - Taras K Oleksyk
- Department of Biology, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
- Biology Department, Uzhhorod National University, Uzhhorod, Ukraine
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11
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Brandt AL, Grigorev K, Afanador-Hernández YM, Paulino LA, Murphy WJ, Núñez A, Komissarov A, Brandt JR, Dobrynin P, Hernández-Martich JD, María R, O'Brien SJ, Rodríguez LE, Martínez-Cruzado JC, Oleksyk TK, Roca AL. Mitogenomic sequences support a north-south subspecies subdivision within Solenodon paradoxus. Mitochondrial DNA A DNA Mapp Seq Anal 2016; 28:662-670. [PMID: 27159724 DOI: 10.3109/24701394.2016.1167891] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Solenodons are insectivores found only in Hispaniola and Cuba, with a Mesozoic divergence date versus extant mainland mammals. Solenodons are the oldest lineage of living eutherian mammal for which a mitogenome sequence has not been reported. We determined complete mitogenome sequences for six Hispaniolan solenodons (Solenodon paradoxus) using next-generation sequencing. The solenodon mitogenomes were 16,454-16,457 bp long and carried the expected repertoire of genes. A mitogenomic phylogeny confirmed the basal position of solenodons relative to shrews and moles, with solenodon mitogenomes estimated to have diverged from those of other mammals ca. 78 Mya. Control region sequences of solenodons from the northern (n = 3) and southern (n = 5) Dominican Republic grouped separately in a network, with FST = 0.72 (p = 0.036) between north and south. This regional genetic divergence supports previous morphological and genetic reports recognizing northern (S. p. paradoxus) and southern (S. p. woodi) subspecies in need of separate conservation plans.
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Affiliation(s)
- Adam L Brandt
- a Department of Animal Sciences , University of Illinois at Urbana-Champaign , Urbana , IL , USA.,b Illinois Natural History Survey , University of Illinois at Urbana-Champaign , Urbana , IL , USA
| | - Kirill Grigorev
- c Department of Biology , University of Puerto Rico at Mayagüez , Mayagüez , Puerto Rico
| | | | - Liz A Paulino
- d Instituto Tecnológico de Santo Domingo (INTEC) , Santo Domingo , Dominican Republic
| | - William J Murphy
- e Department of Veterinary Integrative Biosciences , Texas A&M University , College Station , TX , USA
| | - Adrell Núñez
- f Department of Conservation and Science , Parque Zoológico Nacional (ZOODOM) , Santo Domingo , Dominican Republic
| | - Aleksey Komissarov
- g Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University , St. Petersburg , Russia
| | - Jessica R Brandt
- a Department of Animal Sciences , University of Illinois at Urbana-Champaign , Urbana , IL , USA
| | - Pavel Dobrynin
- g Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University , St. Petersburg , Russia
| | - J David Hernández-Martich
- h Instituto de Investigaciones Botanicas y Zoologicas, Universidad Autónoma de Santo Domingo , Santo Domingo , Dominican Republic
| | - Roberto María
- f Department of Conservation and Science , Parque Zoológico Nacional (ZOODOM) , Santo Domingo , Dominican Republic
| | - Stephen J O'Brien
- g Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University , St. Petersburg , Russia.,i Oceanographic Center, Nova Southeastern University , Fort Lauderdale , FL , USA
| | - Luis E Rodríguez
- d Instituto Tecnológico de Santo Domingo (INTEC) , Santo Domingo , Dominican Republic
| | | | - Taras K Oleksyk
- c Department of Biology , University of Puerto Rico at Mayagüez , Mayagüez , Puerto Rico
| | - Alfred L Roca
- a Department of Animal Sciences , University of Illinois at Urbana-Champaign , Urbana , IL , USA.,b Illinois Natural History Survey , University of Illinois at Urbana-Champaign , Urbana , IL , USA.,j Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign , Urbana , IL , USA
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12
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Dobrynin P, Liu S, Tamazian G, Xiong Z, Yurchenko AA, Krasheninnikova K, Kliver S, Schmidt-Küntzel A, Koepfli KP, Johnson W, Kuderna LFK, García-Pérez R, Manuel MD, Godinez R, Komissarov A, Makunin A, Brukhin V, Qiu W, Zhou L, Li F, Yi J, Driscoll C, Antunes A, Oleksyk TK, Eizirik E, Perelman P, Roelke M, Wildt D, Diekhans M, Marques-Bonet T, Marker L, Bhak J, Wang J, Zhang G, O'Brien SJ. Genomic legacy of the African cheetah, Acinonyx jubatus. Genome Biol 2015; 16:277. [PMID: 26653294 PMCID: PMC4676127 DOI: 10.1186/s13059-015-0837-4] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 11/17/2015] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Patterns of genetic and genomic variance are informative in inferring population history for human, model species and endangered populations. RESULTS Here the genome sequence of wild-born African cheetahs reveals extreme genomic depletion in SNV incidence, SNV density, SNVs of coding genes, MHC class I and II genes, and mitochondrial DNA SNVs. Cheetah genomes are on average 95 % homozygous compared to the genomes of the outbred domestic cat (24.08 % homozygous), Virunga Mountain Gorilla (78.12 %), inbred Abyssinian cat (62.63 %), Tasmanian devil, domestic dog and other mammalian species. Demographic estimators impute two ancestral population bottlenecks: one >100,000 years ago coincident with cheetah migrations out of the Americas and into Eurasia and Africa, and a second 11,084-12,589 years ago in Africa coincident with late Pleistocene large mammal extinctions. MHC class I gene loss and dramatic reduction in functional diversity of MHC genes would explain why cheetahs ablate skin graft rejection among unrelated individuals. Significant excess of non-synonymous mutations in AKAP4 (p<0.02), a gene mediating spermatozoon development, indicates cheetah fixation of five function-damaging amino acid variants distinct from AKAP4 homologues of other Felidae or mammals; AKAP4 dysfunction may cause the cheetah's extremely high (>80 %) pleiomorphic sperm. CONCLUSIONS The study provides an unprecedented genomic perspective for the rare cheetah, with potential relevance to the species' natural history, physiological adaptations and unique reproductive disposition.
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Affiliation(s)
- Pavel Dobrynin
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia.
| | - Shiping Liu
- National Genbank, BGI-Shenzhen, Shenzhen, 518083, China. .,State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, PR China.
| | - Gaik Tamazian
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia.
| | - Zijun Xiong
- National Genbank, BGI-Shenzhen, Shenzhen, 518083, China.
| | - Andrey A Yurchenko
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia.
| | - Ksenia Krasheninnikova
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia.
| | - Sergey Kliver
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia.
| | - Anne Schmidt-Küntzel
- Life Technologies Conservation Genetics Laboratory, Cheetah Conservation Fund, Otjiwarongo, Otjiwarongo, 9000, Namibia.
| | - Klaus-Peter Koepfli
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia. .,National Zoological Park, Smithsonian Conservation Biology Institute, Washington DC, 20007, USA.
| | - Warren Johnson
- National Zoological Park, Smithsonian Conservation Biology Institute, Washington DC, 20007, USA.
| | - Lukas F K Kuderna
- Institut de Biologia Evolutiva (CSIC/UPF), Dr. Aiguader, 88, Barcelona, 08003, Spain.
| | - Raquel García-Pérez
- Institut de Biologia Evolutiva (CSIC/UPF), Dr. Aiguader, 88, Barcelona, 08003, Spain.
| | - Marc de Manuel
- Institut de Biologia Evolutiva (CSIC/UPF), Dr. Aiguader, 88, Barcelona, 08003, Spain.
| | - Ricardo Godinez
- Department of Organismic and Evolutionary Biology and Museum of Comparative Zoology, Harvard University, Cambridge, 02138, Massachusetts, USA.
| | - Aleksey Komissarov
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia.
| | - Alexey Makunin
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia. .,Institute of Molecular and Cellular Biology of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.
| | - Vladimir Brukhin
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia.
| | - Weilin Qiu
- National Genbank, BGI-Shenzhen, Shenzhen, 518083, China.
| | - Long Zhou
- National Genbank, BGI-Shenzhen, Shenzhen, 518083, China.
| | - Fang Li
- National Genbank, BGI-Shenzhen, Shenzhen, 518083, China.
| | - Jian Yi
- National Genbank, BGI-Shenzhen, Shenzhen, 518083, China.
| | - Carlos Driscoll
- Laboratory of Neurogenetics, NIAAA, 5625 Fishers Lane, Rockville, 20852, Maryland, USA.
| | - Agostinho Antunes
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas, 177, Porto, 4050-123, Portugal. .,Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, Porto, 4169-007, Portugal.
| | - Taras K Oleksyk
- Biology Department, University of Puerto-Rico at Mayaguez, Mayaguez, Puerto Rico.
| | - Eduardo Eizirik
- PUCRS, Faculdade de Biociencias, Laboratorio de Biología Genómica e Molecular, Porto Alegre, 90619-900, Brazil.
| | - Polina Perelman
- Institute of Molecular and Cellular Biology of the Russian Academy of Sciences, Novosibirsk, 630090, Russia. .,Novosibirsk State University, Novosibirsk, 630090, Russia.
| | - Melody Roelke
- Laboratory of Animal Sciences Progras, Leídos Biomedical Research Inc., Frederick National Laboratory, Frederick, 21702, Maryland, USA.
| | - David Wildt
- National Zoological Park, Smithsonian Conservation Biology Institute, Washington DC, 20007, USA.
| | - Mark Diekhans
- Center for Biomolecular Science and Engineering, University of California, Santa-Cruz, USA.
| | - Tomas Marques-Bonet
- Institut de Biologia Evolutiva (CSIC/UPF), Dr. Aiguader, 88, Barcelona, 08003, Spain. .,Centro Nacional de Analisis Genomics (CNAG), Baldiri Reixach 4, Barcelona, 08013, Spain. .,State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, PR China.
| | - Laurie Marker
- Cheetah Conservation Fund, Otjiwarongo, Otjiwarongo, 9000, Namibia.
| | - Jong Bhak
- Biomedical Engineering Department, UNIST, Ulsan National Institute of Science and Technology, Ulsan, Korea.
| | - Jun Wang
- BGI-Shenzhen, Shenzhen, 518083, China. .,Department of Biology, University of Copenhagen, Ole Maaløes Vej 5, Copenhagen, 2200, Denmark. .,Princess Al Jawhara Center of Excellence in the Research of Hereditary Disorders, King Abdulaziz University, Jeddah, 21589, Saudi Arabia. .,Macau University of Science and Technology, Taipa, 999078, Macau, China.
| | - Guojie Zhang
- National Genbank, BGI-Shenzhen, Shenzhen, 518083, China. .,Centre for Social Evolution, Department of Biology, University of Copenhagen, Universitetsparken 15, Copenhagen, DK-2100, Denmark.
| | - Stephen J O'Brien
- Theodosius Dobzhansky Center for Genome Bioinformatics, Saint Petersburg State University, 41A Sredniy Avenue, St. Petersburg, 199004, Russia. .,Oceanographic Center, Nova Southeastern University Ft Lauderdale, 8000 N. Ocean Drive, Ft Lauderdale, 33004, Florida, USA.
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13
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Affiliation(s)
- Taras K Oleksyk
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia. University of Puerto Rico, Mayaguez, PR 00680, USA
| | - Vladimir Brukhin
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia
| | - Stephen J O'Brien
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia.
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14
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Limou S, Nelson GW, Lecordier L, An P, O'hUigin CS, David VA, Binns-Roemer EA, Guiblet WM, Oleksyk TK, Pays E, Kopp JB, Winkler CA. Sequencing rare and common APOL1 coding variants to determine kidney disease risk. Kidney Int 2015; 88:754-63. [PMID: 25993319 PMCID: PMC4591109 DOI: 10.1038/ki.2015.151] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 03/26/2015] [Accepted: 04/02/2015] [Indexed: 01/07/2023]
Abstract
A third of African Americans with sporadic focal segmental glomerulosclerosis (FSGS) or HIV-associated nephropathy (HIVAN) do not carry APOL1 renal risk genotypes. This raises the possibility that other APOL1 variants may contribute to kidney disease. To address this question, we sequenced all APOL1 exons in 1, 437 Americans of African and European decent, including 464 patients with biopsy-proven FSGS/HIVAN. Testing for association with 33 common and rare variants with FSGS/HIVAN revealed no association independent of strong recessive G1 and G2 effects. Seeking additional variants that might have been under selection by pathogens and could represent candidates for kidney disease risk, we also sequenced an additional 1, 112 individuals representing 53 global populations. Except for G1 and G2, none of the 7 common codon-altering variants showed evidence of selection or could restore lysis against trypanosomes causing human African trypanosomiasis. Thus, only APOL1 G1 and G2 confer renal risk and other common and rare APOL1 missense variants, including the archaic G3 haplotype, do not contribute to sporadic FSGS and HIVAN in the United States population. Hence, in most potential clinical or screening applications, our study suggests that sequencing APOL1 exons is unlikely to bring additional information compared to genotyping only APOL1 G1 and G2 risk alleles.
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Affiliation(s)
- Sophie Limou
- Molecular Genetic Epidemiology Section, Basic Research Laboratory, Basic Science Program, NCI, Leidos Biomedical Research, Frederick National Laboratory, Frederick, Maryland, USA
| | - George W Nelson
- Center for Cancer Research Informatics Core, Leidos Biomedical Research, Frederick National Laboratory, Frederick, Maryland, USA
| | - Laurence Lecordier
- Laboratory of Molecular Parasitology, IBMM, Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Ping An
- Molecular Genetic Epidemiology Section, Basic Research Laboratory, Basic Science Program, NCI, Leidos Biomedical Research, Frederick National Laboratory, Frederick, Maryland, USA
| | - Colm S O'hUigin
- Laboratory of Experimental Immunology, Cancer and Inflammation Program, NCI, Leidos Biomedical Research, Frederick National Laboratory, Frederick, Maryland, USA
| | - Victor A David
- Molecular Genetic Epidemiology Section, Basic Research Laboratory, Basic Science Program, NCI, Frederick National Laboratory, Frederick, Maryland, USA
| | - Elizabeth A Binns-Roemer
- Molecular Genetic Epidemiology Section, Basic Research Laboratory, Basic Science Program, NCI, Leidos Biomedical Research, Frederick National Laboratory, Frederick, Maryland, USA
| | - Wilfried M Guiblet
- Caribbean Genome Center, Department of Biology, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | - Taras K Oleksyk
- Caribbean Genome Center, Department of Biology, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | - Etienne Pays
- Laboratory of Molecular Parasitology, IBMM, Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Jeffrey B Kopp
- Kidney Disease Section, NIDDK, NIH, Bethesda, Maryland, USA
| | - Cheryl A Winkler
- Molecular Genetic Epidemiology Section, Basic Research Laboratory, Basic Science Program, NCI, Leidos Biomedical Research, Frederick National Laboratory, Frederick, Maryland, USA
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15
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Guiblet WM, Zhao K, O'Brien SJ, Massey SE, Roca AL, Oleksyk TK. SmileFinder: a resampling-based approach to evaluate signatures of selection from genome-wide sets of matching allele frequency data in two or more diploid populations. Gigascience 2015; 4:1. [PMID: 25838885 PMCID: PMC4382839 DOI: 10.1186/2047-217x-4-1] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [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: 01/01/2014] [Accepted: 10/23/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Adaptive alleles may rise in frequency as a consequence of positive selection, creating a pattern of decreased variation in the neighboring loci, known as a selective sweep. When the region containing this pattern is compared to another population with no history of selection, a rise in variance of allele frequencies between populations is observed. One challenge presented by large genome-wide datasets is the ability to differentiate between patterns that are remnants of natural selection from those expected to arise at random and/or as a consequence of selectively neutral demographic forces acting in the population. FINDINGS SmileFinder is a simple program that looks for diversity and divergence patterns consistent with selection sweeps by evaluating allele frequencies in windows, including neighboring loci from two or more populations of a diploid species against the genome-wide neutral expectation. The program calculates the mean of heterozygosity and FST in a set of sliding windows of incrementally increasing sizes, and then builds a resampled distribution (the baseline) of random multi-locus sets matched to the sizes of sliding windows, using an unrestricted sampling. Percentiles of the values in the sliding windows are derived from the superimposed resampled distribution. The resampling can easily be scaled from 1 K to 100 M; the higher the number, the more precise the percentiles ascribed to the extreme observed values. CONCLUSIONS The output from SmileFinder can be used to plot percentile values to look for population diversity and divergence patterns that may suggest past actions of positive selection along chromosome maps, and to compare lists of suspected candidate genes under random gene sets to test for the overrepresentation of these patterns among gene categories. Both applications of the algorithm have already been used in published studies. Here we present a publicly available, open source program that will serve as a useful tool for preliminary scans of selection using worldwide databases of human genetic variation, as well as population datasets for many non-human species, from which such data is rapidly emerging with the advent of new genotyping and sequencing technologies.
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Affiliation(s)
- Wilfried M Guiblet
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez, 00680 Puerto Rico
| | - Kai Zhao
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, 61801 Illinois USA
| | - Stephen J O'Brien
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg University, St. Petersburg, 199034 Russia ; Oceanographic Center, Nova Southeastern University, Ft. Lauderdale, 33004 Florida USA
| | - Steven E Massey
- Biology Department, University of Puerto Rico at Rio Piedras, Rio Piedras, 00931 Puerto Rico
| | - Alfred L Roca
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, 61801 Illinois USA
| | - Taras K Oleksyk
- Biology Department, University of Puerto Rico at Mayagüez, Mayagüez, 00680 Puerto Rico
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16
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Gravel S, Zakharia F, Moreno-Estrada A, Byrnes JK, Muzzio M, Rodriguez-Flores JL, Kenny EE, Gignoux CR, Maples BK, Guiblet W, Dutil J, Via M, Sandoval K, Bedoya G, Oleksyk TK, Ruiz-Linares A, Burchard EG, Martinez-Cruzado JC, Bustamante CD. Reconstructing Native American migrations from whole-genome and whole-exome data. PLoS Genet 2013; 9:e1004023. [PMID: 24385924 PMCID: PMC3873240 DOI: 10.1371/journal.pgen.1004023] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 10/29/2013] [Indexed: 12/12/2022] Open
Abstract
There is great scientific and popular interest in understanding the genetic history of populations in the Americas. We wish to understand when different regions of the continent were inhabited, where settlers came from, and how current inhabitants relate genetically to earlier populations. Recent studies unraveled parts of the genetic history of the continent using genotyping arrays and uniparental markers. The 1000 Genomes Project provides a unique opportunity for improving our understanding of population genetic history by providing over a hundred sequenced low coverage genomes and exomes from Colombian (CLM), Mexican-American (MXL), and Puerto Rican (PUR) populations. Here, we explore the genomic contributions of African, European, and especially Native American ancestry to these populations. Estimated Native American ancestry is in MXL, in CLM, and in PUR. Native American ancestry in PUR is most closely related to populations surrounding the Orinoco River basin, confirming the Southern America ancestry of the Taíno people of the Caribbean. We present new methods to estimate the allele frequencies in the Native American fraction of the populations, and model their distribution using a demographic model for three ancestral Native American populations. These ancestral populations likely split in close succession: the most likely scenario, based on a peopling of the Americas thousand years ago (kya), supports that the MXL Ancestors split kya, with a subsequent split of the ancestors to CLM and PUR kya. The model also features effective populations of in Mexico, in Colombia, and in Puerto Rico. Modeling Identity-by-descent (IBD) and ancestry tract length, we show that post-contact populations also differ markedly in their effective sizes and migration patterns, with Puerto Rico showing the smallest effective size and the earlier migration from Europe. Finally, we compare IBD and ancestry assignments to find evidence for relatedness among European founders to the three populations. Populations of the Americas have a rich and heterogeneous genetic and cultural heritage that draws from a diversity of pre-Columbian Native American, European, and African populations. Characterizing this diversity facilitates the development of medical genetics research in diverse populations and the transfer of medical knowledge across populations. It also represents an opportunity to better understand the peopling of the Americas, from the crossing of Beringia to the post-Columbian era. Here, we take advantage sequencing of individuals of Colombian (CLM), Mexican (MXL), and Puerto Rican (PUR) origin by the 1000 Genomes project to improve our demographic models for the peopling of the Americas. The divergence among African, European, and Native American ancestors to these populations enables us to infer the continent of origin at each locus in the sampled genomes. The resulting patterns of ancestry suggest complex post-Columbian migration histories, starting later in CLM than in MXL and PUR. Whereas European ancestral segments show evidence of relatedness, a demographic model of synonymous variation suggests that the Native American Ancestors to MXL, PUR, and CLM panels split within a few hundred years over 12 thousand years ago. Together with early archeological sites in South America, these results support rapid divergence during the initial peopling of the Americas.
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Affiliation(s)
- Simon Gravel
- Department of Human Genetics, McGill University, Montréal, Québec, Canada
- McGill University and Génome Québec Innovation Centre, Montréal, Québec, Canada
- * E-mail:
| | - Fouad Zakharia
- Department of Genetics, Stanford University, Stanford, California, United States of America
| | - Andres Moreno-Estrada
- Department of Genetics, Stanford University, Stanford, California, United States of America
| | - Jake K. Byrnes
- Department of Genetics, Stanford University, Stanford, California, United States of America
- Ancestry.com DNA LLC, San Francisco, California, United States of America
| | - Marina Muzzio
- Department of Genetics, Stanford University, Stanford, California, United States of America
- Laboratorio de Genética Molecular Poblacional, Instituto Multidisciplinario de Biología Celular (IMBICE). CCT- CONICET-La Plata, Argentina and Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Argentina
| | | | - Eimear E. Kenny
- Department of Genetics, Stanford University, Stanford, California, United States of America
- Department of Genetics and Genomic Sciences, The Charles Bronfman Institute for Personalized Medicine, Center for Statistical Genetics, and Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Christopher R. Gignoux
- Department of Bioengineering and Therapeutic Sciences and Medicine, Univeristy of California San Francisco, San Francisco, California, United States of America
| | - Brian K. Maples
- Department of Genetics, Stanford University, Stanford, California, United States of America
| | - Wilfried Guiblet
- Department of Biology, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | - Julie Dutil
- Department of Biochemistry, Ponce School of Medicine and Health Sciences, Ponce, Puerto Rico
| | - Marc Via
- Department of Bioengineering and Therapeutic Sciences and Medicine, Univeristy of California San Francisco, San Francisco, California, United States of America
- Department of Psychiatry and Clinical Psychobiology, University of Barcelona, Barcelona, Spain
| | - Karla Sandoval
- Department of Genetics, Stanford University, Stanford, California, United States of America
| | | | | | - Taras K. Oleksyk
- Department of Biology, University of Puerto Rico at Mayaguez, Mayaguez, Puerto Rico
| | - Andres Ruiz-Linares
- Department of Genetics, Evolution and Environment, University College London, London, United Kingdom
| | - Esteban G. Burchard
- Department of Bioengineering and Therapeutic Sciences and Medicine, Univeristy of California San Francisco, San Francisco, California, United States of America
| | | | - Carlos D. Bustamante
- Department of Genetics, Stanford University, Stanford, California, United States of America
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Díaz-Lameiro AM, Oleksyk TK, Bird-Picó FJ, Martínez-Cruzado JC. Colonization of islands in the Mona Passage by endemic dwarf geckoes (genus Sphaerodactylus) reconstructed with mitochondrial phylogeny. Ecol Evol 2013; 3:4488-500. [PMID: 24340189 PMCID: PMC3856748 DOI: 10.1002/ece3.770] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [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: 04/04/2013] [Revised: 07/14/2013] [Accepted: 08/12/2013] [Indexed: 11/08/2022] Open
Abstract
Little is known about the natural history of the Sphaerodactylus species endemic to the three islands located in the Mona Passage separating the Greater Antillean islands of Hispaniola and Puerto Rico. In this study, parts of two mitochondrial genes, 16S rRNA and 12S rRNA, were sequenced to determine the relationships between the sphaerodactylids that live in the Mona Passage and other Caribbean species from the same genus. While the main goal was to identify the biogeographical origin of these species, we also identified a genetically distinct type of dwarf gecko that warrants future evaluation as a possible new species. According to the reconstructed phylogenies, we propose a stepwise model of colonization wherein S. nicholsi from southwestern Puerto Rico or a very close ancestor gave rise through a founder event to Sphaerodactylus monensis on Mona Island. In a similar fashion, S. monensis or a very close ancestor on Mona Island gave rise to S. levinsi on Desecheo Island. This study also suggests that the most recent common ancestor between the species from the islands in the Mona Passage and Puerto Rico existed approximately 3 MYA.
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Affiliation(s)
- Alondra M Díaz-Lameiro
- Department of Biology, University of Puerto Rico at Mayagüez Call Box 9000, Mayagüez, Puerto Rico, 00681-9000
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Majeske AJ, Oleksyk TK, Smith LC. The Sp185/333 immune response genes and proteins are expressed in cells dispersed within all major organs of the adult purple sea urchin. Innate Immun 2013; 19:569-87. [PMID: 23405032 DOI: 10.1177/1753425912473850] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Purple sea urchins (Strongylocentrotus purpuratus) express a highly variable set of immune genes called Sp185/333 by two subtypes of coelomocytes: the polygonal and small phagocytes. We report that the Sp185/333 genes and their encoded proteins are also expressed in all of the major organs in the adult sea urchin, including the axial organ, pharynx, esophagus, intestine and gonads. After immune challenge, there is an increase in the level of Sp185/333 mRNA in cells associated with the intestine and axial organ. The Sp185/333 proteins increase in the axial organ, pharynx, esophagus and intestine after challenge. However, the proportion of Sp185/333-positive cells only increases in the axial organ, while there is no change in that proportion in the other organs after challenge. The size range of the major Sp185/333 proteins expressed by organs is broader (5 kDa to > 250 kDa) compared with those in coelomocytes (∼40 kDa to < 250 kDa). Images of the different organs do not clarify whether coelomocytes or parenchymal cells express the Sp185/333 proteins. The increase in levels of Sp185/333 transcripts, protein expression and Sp185/333-positive cells in the axial organ in response to challenge suggests that this organ may have an important role in immunity for this species.
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Affiliation(s)
- Audrey J Majeske
- 1Department of Biological Sciences, George Washington University, Washington, DC, USA
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19
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Zhao K, Ishida Y, Oleksyk TK, Winkler CA, Roca AL. Evidence for selection at HIV host susceptibility genes in a West Central African human population. BMC Evol Biol 2012; 12:237. [PMID: 23217182 PMCID: PMC3537702 DOI: 10.1186/1471-2148-12-237] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Accepted: 11/27/2012] [Indexed: 01/14/2023] Open
Abstract
Background HIV-1 derives from multiple independent transfers of simian immunodeficiency virus (SIV) strains from chimpanzees to human populations. We hypothesized that human populations in west central Africa may have been exposed to SIV prior to the pandemic, and that previous outbreaks may have selected for genetic resistance to immunodeficiency viruses. To test this hypothesis, we examined the genomes of Biaka Western Pygmies, who historically resided in communities within the geographic range of the central African chimpanzee subspecies (Pan troglodytes troglodytes) that carries strains of SIV ancestral to HIV-1. Results SNP genotypes of the Biaka were compared to those of African human populations who historically resided outside the range of P. t. troglodytes, including the Mbuti Eastern Pygmies. Genomic regions showing signatures of selection were compared to the genomic locations of genes reported to be associated with HIV infection or pathogenesis. In the Biaka, a strong signal of selection was detected at CUL5, which codes for a component of the vif-mediated APOBEC3 degradation pathway. A CUL5 allele protective against AIDS progression was fixed in the Biaka. A signal of selection was detected at TRIM5, which codes for an HIV post-entry restriction factor. A protective mis-sense mutation in TRIM5 had the highest frequency in Biaka compared to other African populations, as did a protective allele for APOBEC3G, which codes for an anti-HIV-1 restriction factor. Alleles protective against HIV-1 for APOBEC3H, CXCR6 and HLA-C were at higher frequencies in the Biaka than in the Mbuti. Biaka genomes showed a strong signal of selection at TSG101, an inhibitor of HIV-1 viral budding. Conclusions We found protective alleles or evidence for selection in the Biaka at a number of genes associated with HIV-1 infection or progression. Pygmies have also been reported to carry genotypes protective against HIV-1 for the genes CCR5 and CCL3L1. Our hypothesis that HIV-1 may have shaped the genomes of some human populations in West Central Africa appears to merit further investigation.
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Affiliation(s)
- Kai Zhao
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Il 61801, USA
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20
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Oleksyk TK, Pombert JF, Siu D, Mazo-Vargas A, Ramos B, Guiblet W, Afanador Y, Ruiz-Rodriguez CT, Nickerson ML, Logue DM, Dean M, Figueroa L, Valentin R, Martinez-Cruzado JC. A locally funded Puerto Rican parrot (Amazona vittata) genome sequencing project increases avian data and advances young researcher education. Gigascience 2012; 1:14. [PMID: 23587420 PMCID: PMC3626513 DOI: 10.1186/2047-217x-1-14] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [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: 11/14/2011] [Accepted: 09/14/2012] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Amazona vittata is a critically endangered Puerto Rican endemic bird, the only surviving native parrot species in the United States territory, and the first parrot in the large Neotropical genus Amazona, to be studied on a genomic scale. FINDINGS In a unique community-based funded project, DNA from an A. vittata female was sequenced using a HiSeq Illumina platform, resulting in a total of ~42.5 billion nucleotide bases. This provided approximately 26.89x average coverage depth at the completion of this funding phase. Filtering followed by assembly resulted in 259,423 contigs (N50 = 6,983 bp, longest = 75,003 bp), which was further scaffolded into 148,255 fragments (N50 = 19,470, longest = 206,462 bp). This provided ~76% coverage of the genome based on an estimated size of 1.58 Gb. The assembled scaffolds allowed basic genomic annotation and comparative analyses with other available avian whole-genome sequences. CONCLUSIONS The current data represents the first genomic information from and work carried out with a unique source of funding. This analysis further provides a means for directed training of young researchers in genetic and bioinformatics analyses and will facilitate progress towards a full assembly and annotation of the Puerto Rican parrot genome. It also adds extensive genomic data to a new branch of the avian tree, making it useful for comparative analyses with other avian species. Ultimately, the knowledge acquired from these data will contribute to an improved understanding of the overall population health of this species and aid in ongoing and future conservation efforts.
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Affiliation(s)
- Taras K Oleksyk
- University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | | | | | | | - Brian Ramos
- University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | | | | | - Christina T Ruiz-Rodriguez
- University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
- Cancer and Inflammation Program, National Cancer Institute, NIH, Frederick, MD, USA
| | - Michael L Nickerson
- Cancer and Inflammation Program, National Cancer Institute, NIH, Frederick, MD, USA
| | - David M Logue
- University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | - Michael Dean
- Cancer and Inflammation Program, National Cancer Institute, NIH, Frederick, MD, USA
| | - Luis Figueroa
- Compañía de Parques Nacionales de Puerto Rico, San Juan, Puerto Rico
| | - Ricardo Valentin
- Department of Natural and Environmental Resources, San Juan, Puerto Rico
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Ishida Y, Oleksyk TK, Georgiadis NJ, David VA, Zhao K, Stephens RM, Kolokotronis SO, Roca AL. Reconciling apparent conflicts between mitochondrial and nuclear phylogenies in African elephants. PLoS One 2011; 6:e20642. [PMID: 21701575 PMCID: PMC3110795 DOI: 10.1371/journal.pone.0020642] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Accepted: 05/06/2011] [Indexed: 11/18/2022] Open
Abstract
Conservation strategies for African elephants would be advanced by resolution of conflicting claims that they comprise one, two, three or four taxonomic groups, and by development of genetic markers that establish more incisively the provenance of confiscated ivory. We addressed these related issues by genotyping 555 elephants from across Africa with microsatellite markers, developing a method to identify those loci most effective at geographic assignment of elephants (or their ivory), and conducting novel analyses of continent-wide datasets of mitochondrial DNA. Results showed that nuclear genetic diversity was partitioned into two clusters, corresponding to African forest elephants (99.5% Cluster-1) and African savanna elephants (99.4% Cluster-2). Hybrid individuals were rare. In a comparison of basal forest "F" and savanna "S" mtDNA clade distributions to nuclear DNA partitions, forest elephant nuclear genotypes occurred only in populations in which S clade mtDNA was absent, suggesting that nuclear partitioning corresponds to the presence or absence of S clade mtDNA. We reanalyzed African elephant mtDNA sequences from 81 locales spanning the continent and discovered that S clade mtDNA was completely absent among elephants at all 30 sampled tropical forest locales. The distribution of savanna nuclear DNA and S clade mtDNA corresponded closely to range boundaries traditionally ascribed to the savanna elephant species based on habitat and morphology. Further, a reanalysis of nuclear genetic assignment results suggested that West African elephants do not comprise a distinct third species. Finally, we show that some DNA markers will be more useful than others for determining the geographic origins of illegal ivory. These findings resolve the apparent incongruence between mtDNA and nuclear genetic patterns that has confounded the taxonomy of African elephants, affirm the limitations of using mtDNA patterns to infer elephant systematics or population structure, and strongly support the existence of two elephant species in Africa.
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Affiliation(s)
- Yasuko Ishida
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Taras K. Oleksyk
- Department of Biology, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
| | | | - Victor A. David
- Laboratory of Genomic Diversity, National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Kai Zhao
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
| | - Robert M. Stephens
- Advanced Biomedical Computing Center, SAIC-Frederick, Inc., National Cancer Institute at Frederick, Frederick, Maryland, United States of America
| | - Sergios-Orestis Kolokotronis
- Sackler Institute for Comparative Genomics, American Museum of Natural History, New York, New York, United States of America
| | - Alfred L. Roca
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States of America
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Via M, Gignoux CR, Roth LA, Fejerman L, Galanter J, Choudhry S, Toro-Labrador G, Viera-Vera J, Oleksyk TK, Beckman K, Ziv E, Risch N, Burchard EG, Martínez-Cruzado JC. History shaped the geographic distribution of genomic admixture on the island of Puerto Rico. PLoS One 2011; 6:e16513. [PMID: 21304981 PMCID: PMC3031579 DOI: 10.1371/journal.pone.0016513] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Accepted: 01/04/2011] [Indexed: 12/16/2022] Open
Abstract
Contemporary genetic variation among Latin Americans human groups reflects population migrations shaped by complex historical, social and economic factors. Consequently, admixture patterns may vary by geographic regions ranging from countries to neighborhoods. We examined the geographic variation of admixture across the island of Puerto Rico and the degree to which it could be explained by historic and social events. We analyzed a census-based sample of 642 Puerto Rican individuals that were genotyped for 93 ancestry informative markers (AIMs) to estimate African, European and Native American ancestry. Socioeconomic status (SES) data and geographic location were obtained for each individual. There was significant geographic variation of ancestry across the island. In particular, African ancestry demonstrated a decreasing East to West gradient that was partially explained by historical factors linked to the colonial sugar plantation system. SES also demonstrated a parallel decreasing cline from East to West. However, at a local level, SES and African ancestry were negatively correlated. European ancestry was strongly negatively correlated with African ancestry and therefore showed patterns complementary to African ancestry. By contrast, Native American ancestry showed little variation across the island and across individuals and appears to have played little social role historically. The observed geographic distributions of SES and genetic variation relate to historical social events and mating patterns, and have substantial implications for the design of studies in the recently admixed Puerto Rican population. More generally, our results demonstrate the importance of incorporating social and geographic data with genetics when studying contemporary admixed populations.
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Affiliation(s)
- Marc Via
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
- Institute for Human Genetics, University of California, San Francisco, California, United States of America
- * E-mail: (MV); (EGB); (JCM-C)
| | - Christopher R. Gignoux
- Institute for Human Genetics, University of California, San Francisco, California, United States of America
| | - Lindsey A. Roth
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Laura Fejerman
- Institute for Human Genetics, University of California, San Francisco, California, United States of America
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California, United States of America
| | - Joshua Galanter
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Shweta Choudhry
- Institute for Human Genetics, University of California, San Francisco, California, United States of America
- Department of Urology, University of California San Francisco, San Francisco, California, United States of America
| | | | - Jorge Viera-Vera
- Department of Biology, University of Puerto Rico, Río Piedras, Puerto Rico
| | - Taras K. Oleksyk
- Department of Biology, University of Puerto Rico, Río Piedras, Puerto Rico
| | - Kenneth Beckman
- Department of Genetics, Cell Biology & Developmental Biology, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Elad Ziv
- Institute for Human Genetics, University of California, San Francisco, California, United States of America
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California, United States of America
| | - Neil Risch
- Institute for Human Genetics, University of California, San Francisco, California, United States of America
- Division of Research, Kaiser Permanente, Oakland, California, United States of America
| | - Esteban González Burchard
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
- Institute for Human Genetics, University of California, San Francisco, California, United States of America
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, San Francisco, California, United States of America
- * E-mail: (MV); (EGB); (JCM-C)
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23
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Genovese G, Friedman DJ, Ross MD, Lecordier L, Uzureau P, Freedman BI, Bowden DW, Langefeld CD, Oleksyk TK, Uscinski Knob AL, Bernhardy AJ, Hicks PJ, Nelson GW, Vanhollebeke B, Winkler CA, Kopp JB, Pays E, Pollak MR. Association of trypanolytic ApoL1 variants with kidney disease in African Americans. Science 2010; 329:841-5. [PMID: 20647424 DOI: 10.1126/science.1193032] [Citation(s) in RCA: 1422] [Impact Index Per Article: 101.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
African Americans have higher rates of kidney disease than European Americans. Here, we show that, in African Americans, focal segmental glomerulosclerosis (FSGS) and hypertension-attributed end-stage kidney disease (H-ESKD) are associated with two independent sequence variants in the APOL1 gene on chromosome 22 {FSGS odds ratio = 10.5 [95% confidence interval (CI) 6.0 to 18.4]; H-ESKD odds ratio = 7.3 (95% CI 5.6 to 9.5)}. The two APOL1 variants are common in African chromosomes but absent from European chromosomes, and both reside within haplotypes that harbor signatures of positive selection. ApoL1 (apolipoprotein L-1) is a serum factor that lyses trypanosomes. In vitro assays revealed that only the kidney disease-associated ApoL1 variants lysed Trypanosoma brucei rhodesiense. We speculate that evolution of a critical survival factor in Africa may have contributed to the high rates of renal disease in African Americans.
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Affiliation(s)
- Giulio Genovese
- Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA
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Oleksyk TK, Nelson GW, An P, Kopp JB, Winkler CA. Worldwide distribution of the MYH9 kidney disease susceptibility alleles and haplotypes: evidence of historical selection in Africa. PLoS One 2010; 5:e11474. [PMID: 20634883 PMCID: PMC2901326 DOI: 10.1371/journal.pone.0011474] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Accepted: 06/14/2010] [Indexed: 01/27/2023] Open
Abstract
MYH9 was recently identified as renal susceptibility gene (OR 3-8, p < 10(-8)) for major forms of kidney disease disproportionately affecting individuals of African descent. The risk haplotype (E-1) occurs at much higher frequencies in African Americans (> or = 60%) than in European Americans (< 4%), revealing a genetic basis for a major health disparity. The population distributions of MYH9 risk alleles and the E-1 risk haplotype and the demographic and selective forces acting on the MYH9 region are not well explored. We reconstructed MYH9 haplotypes from 4 tagging single nucleotide polymorphisms (SNPs) spanning introns 12-23 using available data from HapMap Phase II, and by genotyping 938 DNAs from the Human Genome Diversity Panel (HGDP). The E-1 risk haplotype followed a cline, being most frequent within sub-Saharan African populations (range 50-80%), less frequent in populations from the Middle East (9-27%) and Europe (0-9%), and rare or absent in Asia, the Americas, and Oceania. The fixation indexes (F(ST)) for pairwise comparisons between the risk haplotypes for continental populations were calculated for MYH9 haplotypes; F(ST) ranged from 0.27-0.40 for Africa compared to other continental populations, possibly due to selection. Uniquely in Africa, the Yoruba population showed high frequency extended haplotype length around the core risk allele (C) compared to the alternative allele (T) at the same locus (rs4821481, iHs = 2.67), as well as high population differentiation (F(ST(CEU vs. YRI)) = 0.51) in HapMap Phase II data, also observable only in the Yoruba population from HGDP (F(ST) = 0.49), pointing to an instance of recent selection in the genomic region. The population-specific divergence in MYH9 risk allele frequencies among the world's populations may prove important in risk assessment and public health policies to mitigate the burden of kidney disease in vulnerable populations.
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Affiliation(s)
- Taras K Oleksyk
- Department of Biology, University of Puerto Rico at Mayagüez, Mayagüez, Puerto Rico
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Abstract
Detecting recent selected ‘genomic footprints’ applies directly to the discovery of disease genes and in the imputation of the formative events that molded modern population genetic structure. The imprints of historic selection/adaptation episodes left in human and animal genomes allow one to interpret modern and ancestral gene origins and modifications. Current approaches to reveal selected regions applied in genome-wide selection scans (GWSSs) fall into eight principal categories: (I) phylogenetic footprinting, (II) detecting increased rates of functional mutations, (III) evaluating divergence versus polymorphism, (IV) detecting extended segments of linkage disequilibrium, (V) evaluating local reduction in genetic variation, (VI) detecting changes in the shape of the frequency distribution (spectrum) of genetic variation, (VII) assessing differentiating between populations (FST), and (VIII) detecting excess or decrease in admixture contribution from one population. Here, we review and compare these approaches using available human genome-wide datasets to provide independent verification (or not) of regions found by different methods and using different populations. The lessons learned from GWSSs will be applied to identify genome signatures of historic selective pressures on genes and gene regions in other species with emerging genome sequences. This would offer considerable potential for genome annotation in functional, developmental and evolutionary contexts.
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Affiliation(s)
- Taras K Oleksyk
- Biology Department, University of Puerto Rico at Mayaguez, Mayaguez 00681, Puerto Rico.
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Oleksyk TK, Shrestha S, Truelove AL, Goedert JJ, Donfield SM, Phair J, Mehta S, O'Brien SJ, Smith MW. Extended IL10 haplotypes and their association with HIV progression to AIDS. Genes Immun 2009; 10:309-22. [PMID: 19295541 DOI: 10.1038/gene.2009.9] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Interleukin-10 (IL-10) is a pleiotropic cytokine with both immunosuppressive and immunostimulatory functions. Its roles in infections and autoimmunity may have resulted in selective pressures on polymorphisms within the gene, leading to genomic coexistence of several semi-conserved haplotypes involved with diverse pathogen interactions during genomic evolution. Previous studies focused either exclusively on promoter haplotypes or on individual SNPs. We genotyped 21 single nucleotide polymorphisms in the human IL10 gene and examined this variation compared to other mammalian species sequences. Haplotype heterogeneity in human populations is centered around 'classic' 'proximal' promoter polymorphisms: -592, -819 and -1082. High-producing GCC haplotypes are by far the most numerous and diverse group, the intermediate IL-10 producing ACC-inclusive haplotypes seem to be related most closely to the ancestral haplotype, and the ATA-inclusive haplotypes cluster a separate branch with strong bootstrap support. We looked at associations of corresponding haplotypes with HIV progression. A haplotype trend regression confirmed that individuals carrying the low-producing ATA-inclusive haplotypes in European Americans progress to AIDS faster, and most likely explain the role of IL10. Our findings are consistent with the hypothesis that existing polymorphisms in this gene may reflect a balance of historic adaptive responses to autoimmune, infectious and other disease agents.
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Affiliation(s)
- T K Oleksyk
- Laboratory of Genomic Diversity, and Basic Research Program, Science Applications International Corporation-Frederick, National Cancer Institute at Frederick, Frederick, MD 21702, USA
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Volfovsky N, Oleksyk TK, Cruz KC, Truelove AL, Stephens RM, Smith MW. Genome and gene alterations by insertions and deletions in the evolution of human and chimpanzee chromosome 22. BMC Genomics 2009; 10:51. [PMID: 19171065 PMCID: PMC2654908 DOI: 10.1186/1471-2164-10-51] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 01/26/2009] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Understanding structure and function of human genome requires knowledge of genomes of our closest living relatives, the primates. Nucleotide insertions and deletions (indels) play a significant role in differentiation that underlies phenotypic differences between humans and chimpanzees. In this study, we evaluated distribution, evolutionary history, and function of indels found by comparing syntenic regions of the human and chimpanzee genomes. RESULTS Specifically, we identified 6,279 indels of 10 bp or greater in a ~33 Mb alignment between human and chimpanzee chromosome 22. After the exclusion of those in repetitive DNA, 1,429 or 23% of indels still remained. This group was characterized according to the local or genome-wide repetitive nature, size, location relative to genes, and other genomic features. We defined three major classes of these indels, using local structure analysis: (i) those indels found uniquely without additional copies of indel sequence in the surrounding (10 Kb) region, (ii) those with at least one exact copy found nearby, and (iii) those with similar but not identical copies found locally. Among these classes, we encountered a high number of exactly repeated indel sequences, most likely due to recent duplications. Many of these indels (683 of 1,429) were in proximity of known human genes. Coding sequences and splice sites contained significantly fewer of these indels than expected from random expectations, suggesting that selection is a factor in limiting their persistence. A subset of indels from coding regions was experimentally validated and their impacts were predicted based on direct sequencing in several human populations as well as chimpanzees, bonobos, gorillas, and two subspecies of orangutans. CONCLUSION Our analysis demonstrates that while indels are distributed essentially randomly in intergenic and intronic genomic regions, they are significantly under-represented in coding sequences. There are substantial differences in representation of indel classes among genomic elements, most likely caused by differences in their evolutionary histories. Using local sequence context, we predicted origins and phylogenetic relationships of gene-impacting indels in primate species. These results suggest that genome plasticity is a major force behind speciation events separating the great ape lineages.
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Affiliation(s)
- Natalia Volfovsky
- Advanced Biomedical Computing Center, Advanced Technology Program, SAIC-Frederick, National Cancer Institute at Frederick, Frederick, MD 21702, USA.
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Truelove AL, Oleksyk TK, Shrestha S, Thio CL, Goedert JJ, Donfield SM, Kirk GD, Thomas DL, O'Brien SJ, Smith MW. Evaluation of IL10, IL19 and IL20 gene polymorphisms and chronic hepatitis B infection outcome. Int J Immunogenet 2008; 35:255-64. [PMID: 18479293 DOI: 10.1111/j.1744-313x.2008.00770.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hepatitis B virus (HBV) infection remains a serious global health problem despite the availability of a highly effective vaccine. Approximately 5% of HBV-infected adults develop chronic hepatitis B, which may result in liver cirrhosis or hepatocellular carcinoma. Variants of interleukin-10 (IL10) have been previously associated with chronic hepatitis B infection and progression to hepatocellular carcinoma. Single nucleotide polymorphisms (SNP; n = 42) from the IL10, IL19 and IL20 gene regions were examined for an association with HBV infection outcome, either chronic or recovered, in a nested case-control study of African Americans and European Americans. Among African Americans, three nominally statistically significant SNP associations in IL10, two in IL20, and one haplotype association were observed with different HBV infection outcomes (P = 0.005-0.04). A SNP (rs1518108) in IL20 deviated significantly from Hardy-Weinberg equilibrium in African Americans, with a large excess of heterozygotes in chronic HBV-infected cases (P = 0.0006), which suggests a strong genetic effect. Among European Americans, a nominally statistically significant SNP association in IL20 and an IL20 haplotype were associated with HBV recovery (P = 0.01-0.04). These results suggest that IL10 and IL20 gene variants influence HBV infection outcome and encourage the pursuit of further studies of these cytokines in HBV pathogenesis.
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Affiliation(s)
- Ann L Truelove
- Laboratory of Genomic Diversity, National Cancer Institute, Frederick, MD, USA
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Oleksyk TK, Zhao K, De La Vega FM, Gilbert DA, O'Brien SJ, Smith MW. Identifying selected regions from heterozygosity and divergence using a light-coverage genomic dataset from two human populations. PLoS One 2008; 3:e1712. [PMID: 18320033 PMCID: PMC2248624 DOI: 10.1371/journal.pone.0001712] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2007] [Accepted: 01/30/2008] [Indexed: 11/18/2022] Open
Abstract
When a selective sweep occurs in the chromosomal region around a target gene in two populations that have recently separated, it produces three dramatic genomic consequences: 1) decreased multi-locus heterozygosity in the region; 2) elevated or diminished genetic divergence (FST) of multiple polymorphic variants adjacent to the selected locus between the divergent populations, due to the alternative fixation of alleles; and 3) a consequent regional increase in the variance of FST (S2FST) for the same clustered variants, due to the increased alternative fixation of alleles in the loci surrounding the selection target. In the first part of our study, to search for potential targets of directional selection, we developed and validated a resampling-based computational approach; we then scanned an array of 31 different-sized moving windows of SNP variants (5–65 SNPs) across the human genome in a set of European and African American population samples with 183,997 SNP loci after correcting for the recombination rate variation. The analysis revealed 180 regions of recent selection with very strong evidence in either population or both. In the second part of our study, we compared the newly discovered putative regions to those sites previously postulated in the literature, using methods based on inspecting patterns of linkage disequilibrium, population divergence and other methodologies. The newly found regions were cross-validated with those found in nine other studies that have searched for selection signals. Our study was replicated especially well in those regions confirmed by three or more studies. These validated regions were independently verified, using a combination of different methods and different databases in other studies, and should include fewer false positives. The main strength of our analysis method compared to others is that it does not require dense genotyping and therefore can be used with data from population-based genome SNP scans from smaller studies of humans or other species.
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Affiliation(s)
- Taras K Oleksyk
- Laboratory of Genomic Diversity, National Cancer Institute at Frederick, Frederick, Maryland, USA.
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Abstract
Research on populations from radioactively contaminated areas around Chornobyl has produced ambiguous results for the presence of radiation effects. More studies are needed to provide information on whether radiation exposure at Chornobyl significantly affected genetic diversity in natural populations of various taxa. Eleven and nine variable microsatellite loci were used to test for differences in genetic diversity between reference and Chornobyl populations of two cattail species (Typha angustifolia and Typha latifolia, respectively) from Ukraine. Our purpose was to determine whether radiation had a significant impact on genetic diversities of the Chornobyl Typha populations, or if their genetic composition might be better explained by species demography and/or changes in population dynamics, mainly in sexual and asexual reproduction. Populations closest to the reactor had increased genetic diversities and high number of genets, which likely were due to factors other than radiation including increased gene flow among Chornobyl populations, enhanced sexual reproduction within populations, and/or origin of the genets from seed bank. Both Typha species also demonstrated small but significant effects associated with latitude, geographical regions, and watersheds. Typha's demography in Ukraine possibly varies with these three factors, and the small difference between Chornobyl and reference populations of T. latifolia detected after partitioning the total genetic variance between them is probably due primarily to these factors. However, the positive correlations of several genetic characteristics with radionuclide concentrations suggest that radiation may have also affected genetics of Chornobyl Typha populations but much less than was expected considering massive contamination of the Chornobyl area.
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Affiliation(s)
- Olga V Tsyusko
- The University of Georgia, Savannah River Ecology Laboratory, PO E, Aiken, SC 29802, USA.
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Purdue JR, Oleksyk TK, Smith MH. Independent occurrences of multiple repeats in the control region of mitochondrial DNA of white-tailed deer. ACTA ACUST UNITED AC 2006; 97:235-43. [PMID: 16614132 DOI: 10.1093/jhered/esj032] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Deer in the genera Mazama and Odocoileus generally have two copies of a 75-base-pair (bp) repeat in the left domain of the control region of the mitochondrial DNA (mtDNA). Phylogenetic analyses further suggest an ancient origin for the duplication supporting a previously stated contention that this event occurred before the separation of Mazama and Odocoileus. However, white-tailed deer (Odocoileus virginianus) had three or four copies of a 75-bp repeat in the control region of their mtDNA in 7.8% of the individuals analyzed, and all of these animals were from the coastal plain of the southeastern United States. When copy 3 is present, it is very similar in sequence to copy 2, but variation suggests that copy 3 probably evolved multiple times from copy 2. The pattern of phylogenetic clustering of the haplotypes from across the coastal plain also suggests that phenotypes with three or four copies of the repeat have originated multiple times. The 44 observed haplotypes showed strong spatial subdivision across the area with subpopulations frequently showing complete shifts in haplotype frequencies from others taken from nearby areas. Many of the subpopulations right along the coast or on adjacent barrier islands have a limited number of haplotypes as would occur in populations undergoing drift because of small numbers of breeding females and limited female dispersal.
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Affiliation(s)
- James R Purdue
- Illinois State Museum, 1101East Ash Street, Springfield, IL 62704, USA
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Oleksyk TK, Thio CL, Truelove AL, Goedert JJ, Donfield SM, Kirk GD, Thomas DL, O'Brien SJ, Smith MW. Single nucleotide polymorphisms and haplotypes in the IL10 region associated with HCV clearance. Genes Immun 2005; 6:347-57. [PMID: 15815689 DOI: 10.1038/sj.gene.6364188] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Hepatitis C virus (HCV) is an infectious blood-borne pathogen that usually persists as a chronic infection. However, approximately 15% of the time, patients can clear the virus, indicating that host differences could be critical in determining the course of HCV infection. The inflammatory response is crucial to resolving or failing to resolve an acute HCV infection. Some previous reports have implicated interleukin 10 (IL10) polymorphisms with successful anti-HCV therapy and natural viral clearance. We tested 54 single nucleotide polymorphisms (SNPs) in the IL10 region (+/-300 kb and 24 within the IL10 gene itself), which contains 13 genes including the IL10 immunomodulatory paralogs IL19, IL20, and IL24, for association with HCV clearance vs persistence. SNPs from two haplotype block regions, one at IL10 and the other from IL19/IL20, were associated with HCV clearance in African Americans (91 clearance cases and 183 chronically infected matched controls; P=0.05-0.002) while with expectation-maximization algorithm-reconstructed haplotypes, these associations remained (P=0.05-0.002). However, no significant associations were detected in European Americans (108 clearance and 245 chronic). Our results indicate that variants of the immunomodulatory IL10 and IL19/IL20 genes may be involved in natural clearance of HCV in the African-American population.
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Affiliation(s)
- T K Oleksyk
- Laboratory of Genomic Diversity, National Cancer Institute at Frederick, Frederick, MD 21702, USA
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Oleksyk TK, Goldfarb LG, Sivtseva T, Danilova AP, Osakovsky VL, Shrestha S, O'Brien SJ, Smith MW. Evaluating association and transmission of eight inflammatory genes with Viliuisk encephalomyelitis susceptibility. ACTA ACUST UNITED AC 2004; 31:121-8. [PMID: 15182325 DOI: 10.1111/j.1365-2370.2004.00459.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Since the discovery of Viliuisk encephalomyelitis (VE) in 1887, scientists have tried to understand the natural history and aetiology of this endemic neurological disorder among the native Sakha population of Central Siberia. Familial aggregation and segregation analysis suggested a genetic influence on VE incidence. However, recent studies have implicated an unknown virus, possibly from the alpha herpesvirus family, as a possible cause for this disease. As VE is a neurological disease characterized by the inflammatory reactions systematically observed in the spinocerebellar fluid and in the brain tissue of deceased patients, we examined 17 single nucleotide polymorphisms (SNPs) across seven inflammation-related candidate gene regions, including chemokine receptors type 2 and 5 (CCR2/CCR5), interferon-gamma (IFN-gamma), interleukin-4 (IL-4), IL-6, IL-10, stromal cell-derived factor (SDF) and chemokine regulated upon activation, normal T-cell expressed and presumably secreted (RANTES). Our main objective was to analyse the degree of genetic association between VE and candidate genes that have been previously implicated in other inflammatory diseases. Samples were collected from 83 affected families comprising 88 verified VE cases, 156 family members, and an additional 69 unrelated, unaffected inhabitants of the same geographical area. This collection included substantially all of the cases that are currently on the VE Registry. The experimental design included both case-control and transmission/disequilibrium test (TDT)-based familial association analyses. None of 17 SNPs analysed was significantly associated with VE occurrence. Exclusion of these eight genes based on the lack of association has important implications for identifying the disease agent, as well as prescribing therapy and understanding Viliuisk encephalomyelitis.
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Affiliation(s)
- T K Oleksyk
- Laboratory of Genomic Diversity, National Cancer Institute at Frederick, NIH, MD 21702-1201, USA
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Oleksyk TK, Novak JM, Purdue JR, Gashchak SP, Smith MH. High levels of fluctuating asymmetry in populations of Apodemus flavicollis from the most contaminated areas in Chornobyl. J Environ Radioact 2004; 73:1-20. [PMID: 15001292 DOI: 10.1016/j.jenvrad.2003.07.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2003] [Revised: 07/30/2003] [Accepted: 07/30/2003] [Indexed: 05/24/2023]
Abstract
Random deviations from the perfect symmetry of normally bilaterally symmetrical characters for an individual with a given genotype occur during individual development due to the influence of multiple environmental factors. Fluctuating asymmetry (FA) is often used as a measure of developmental instability, and can be estimated as the variance of the distribution of differences between the left and right sides. We addressed the question of whether levels of FA were elevated in radioactively contaminated populations living around Chornobyl compared to those in reference populations of the yellow-necked mouse (Apodemus flavicollis). In addition, we studied amounts of directional asymmetry (DA) when one side is larger than the other on average. There was a significant difference among populations, including reference populations, in the amount of both FA and DA. A higher level of FA was documented for the contaminated populations in close proximity to the failed Chornobyl reactor for both the asymmetry of size and shape. The FAs of size and shape were highest in populations from the most contaminated locations in the Chornobyl exclusion zone. Although the directional asymmetry of shape was also highest in the contaminated populations, it was not significantly different from those in most of the reference populations. Populations from less contaminated areas inside the Chornobyl exclusion zone did not express FA values different from those of the reference populations outside the affected area. FA of skulls of A. flavicollis may indicate the degree to which the level of radioactive contamination affects the development of animals at Chornobyl. However, the mechanisms leading to these effects are not clear and probably vary from population to population. There were significant correlations between the overall right to left differences for the Procrustes aligned shape configurations, centroid sizes, and intramuscular (137)Cs. Detectable effects of radiation on developmental stability probably start to occur between 0.132 and 0.297 microGy/h.
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Affiliation(s)
- Taras K Oleksyk
- Savannah River Ecology Laboratory of the University of Georgia, Drawer E, Aiken, SC 29802, USA.
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Oleksyk TK, Gashchak SP, Glenn TC, Jagoe CH, Peles JD, Purdue JR, Tsyusk OV, Zalissky OO, Smith MH. Frequency distributions of 137Cs in fish and mammal populations. J Environ Radioact 2002; 61:55-74. [PMID: 12113506 DOI: 10.1016/s0265-931x(01)00114-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We collected fish and mammals in several radioactively contaminated locations in the Chornobyl Exclusion Zone and analyzed them for 137Cs content. Frequency distributions were built for populations of channel catfish, yellow-necked mice and bank voles. We combined our data with similar data from several other studies to demonstrate the relationship between the standard deviations and means of 137Cs of fish and mammal populations. The frequency distributions of 137Cs in populations of fish and mammals are not normal, as indicated by the strong relationship between standard deviation and mean. Distributions for mammals are more skewed than those for fish. Fish and mammals probably use their environments in fundamentally different ways. The highest concentrations and thus greatest risks are therefore confined to relatively few individuals in each population.
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Affiliation(s)
- Taras K Oleksyk
- Savannah River Ecology Laboratory, The University of Georgia's, Drawer E, Aiken, SC 29802, USA.
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