1
|
Li P, Dupont B, Hu Q, Crimi M, Shen Y, Lebedev I, Liehr T. The past, present, and future for constitutional ring chromosomes: A report of the international consortium for human ring chromosomes. HGG ADVANCES 2022; 3:100139. [PMID: 36187226 PMCID: PMC9519620 DOI: 10.1016/j.xhgg.2022.100139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Human ring chromosomes (RCs) are rare diseases with an estimated newborn incidence of 1/50,000 and an annual occurrence of 2,800 patients globally. Over the past 60 years, banding cytogenetics, fluorescence in situ hybridization (FISH), chromosome microarray analysis (CMA), and whole-genome sequencing (WGS) has been used to detect an RC and further characterize its genomic alterations. Ring syndrome featuring sever growth retardation and variable intellectual disability has been considered as general clinical presentations for all RCs due to the cellular losses from the dynamic mosaicism of RC instability through mitosis. Cytogenomic heterogeneity ranging from simple complete RCs to complex rearranged RCs and variable RC intolerance with different relative frequencies have been observed. Clinical heterogeneity, including chromosome-specific deletion and duplication syndromes, gene-related organ and tissue defects, cancer predisposition to different types of tumors, and reproductive failure, has been reported in the literature. However, the patients with RCs reported in the literature accounted for less than 1% of its occurrence. Current diagnostic practice lacks laboratory standards for analyzing cellular behavior and genomic imbalances of RCs to evaluate the compound effects on patients. Under-representation of clinical cases and lack of comprehensive diagnostic analysis make it a challenge for evidence-based interpretation of clinico-cytogenomic correlations and recommendation of follow-up clinical management. Given recent advancements in genomic technologies and organized efforts by international collaborations and patient advocacy organizations, the prospective of standardized cytogenomic diagnosis and evidence-based clinical management for all patients with RCs could be achieved at an unprecedented global scale.
Collapse
Affiliation(s)
- Peining Li
- Clinical Cytogenetics Laboratory, Department of Genetics, Yale School of Medicine, New Haven, CT, USA
- Corresponding author
| | - Barbara Dupont
- Cytogenetics Laboratory, Greenwood Genetic Center, Greenwood, SC, USA
- Corresponding author
| | - Qiping Hu
- Department of Cell Biology and Genetics, Institute of Basic Medicine, Guangxi Medical University, Nanning, Guangxi, China
| | - Marco Crimi
- Ring 14 International, Via Santa Maria Alla Porta 2, 20123 Milano, Italy
- Kaleidos SCS, Scientific Office, Via Moretti Andrea 20, 24121 Bergamo, Italy
| | - Yiping Shen
- Division of Genetics and Genomics, Boston Children’s Hospital, Department of Neurology, Harvard Medical School, Boston, MA, USA
| | - Igor Lebedev
- Laboratory of Ontogenetics, Research Institute of Medical Genetics, Tomsk National Research Medical Center of the Russian Academy of Sciences, Tomsk 634050, Russia
- Corresponding author
| | - Thomas Liehr
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, 07747 Jena, Germany
- Corresponding author
| |
Collapse
|
2
|
Nikitina TV, Kashevarova AA, Gridina MM, Lopatkina ME, Khabarova AA, Yakovleva YS, Menzorov AG, Minina YA, Pristyazhnyuk IE, Vasilyev SA, Fedotov DA, Serov OL, Lebedev IN. Complex biology of constitutional ring chromosomes structure and (in)stability revealed by somatic cell reprogramming. Sci Rep 2021; 11:4325. [PMID: 33619287 PMCID: PMC7900208 DOI: 10.1038/s41598-021-83399-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 02/01/2021] [Indexed: 01/07/2023] Open
Abstract
Human ring chromosomes are often unstable during mitosis, and daughter cells can be partially or completely aneuploid. We studied the mitotic stability of four ring chromosomes, 8, 13, 18, and 22, in long-term cultures of skin fibroblasts and induced pluripotent stem cells (iPSCs) by GTG karyotyping and aCGH. Ring chromosome loss and secondary aberrations were observed in all fibroblast cultures except for r(18). We found monosomy, fragmentation, and translocation of indexed chromosomes. In iPSCs, aCGH revealed striking differences in mitotic stability both between iPSC lines with different rings and, in some cases, between cell lines with the same ring chromosome. We registered the spontaneous rescue of karyotype 46,XY,r(8) to 46,XY in all six iPSC lines through ring chromosome loss and intact homologue duplication with isoUPD(8)pat occurrence, as proven by SNP genotype distribution analysis. In iPSCs with other ring chromosomes, karyotype correction was not observed. Our results suggest that spontaneous correction of the karyotype with ring chromosomes in iPSCs is not universal and that pluripotency is compatible with a wide range of derivative karyotypes. We conclude that marked variability in the frequency of secondary rearrangements exists in both fibroblast and iPSC cultures, expanding the clinical significance of the constitutional ring chromosome.
Collapse
Affiliation(s)
- T V Nikitina
- Research Institute of Medical Genetics, Tomsk National Research Medical Center, Ushaika Street 10, Tomsk, 634050, Russia.
| | - A A Kashevarova
- Research Institute of Medical Genetics, Tomsk National Research Medical Center, Ushaika Street 10, Tomsk, 634050, Russia
| | - M M Gridina
- Department of Molecular Mechanisms of Development, Institute of Cytology and Genetics SB RAS, Novosibirsk, 630090, Russia
| | - M E Lopatkina
- Research Institute of Medical Genetics, Tomsk National Research Medical Center, Ushaika Street 10, Tomsk, 634050, Russia
| | - A A Khabarova
- Department of Molecular Mechanisms of Development, Institute of Cytology and Genetics SB RAS, Novosibirsk, 630090, Russia
| | - Yu S Yakovleva
- Research Institute of Medical Genetics, Tomsk National Research Medical Center, Ushaika Street 10, Tomsk, 634050, Russia.,Department of Medical Genetics, Siberian State Medical University, Tomsk, 634050, Russia
| | - A G Menzorov
- Department of Molecular Mechanisms of Development, Institute of Cytology and Genetics SB RAS, Novosibirsk, 630090, Russia.,Department of Natural Sciences, Novosibirsk State University, Novosibirsk, 630090, Russia
| | - Yu A Minina
- Department of Molecular Mechanisms of Development, Institute of Cytology and Genetics SB RAS, Novosibirsk, 630090, Russia
| | - I E Pristyazhnyuk
- Department of Molecular Mechanisms of Development, Institute of Cytology and Genetics SB RAS, Novosibirsk, 630090, Russia
| | - S A Vasilyev
- Research Institute of Medical Genetics, Tomsk National Research Medical Center, Ushaika Street 10, Tomsk, 634050, Russia
| | - D A Fedotov
- Department of Medical Genetics, Siberian State Medical University, Tomsk, 634050, Russia
| | - O L Serov
- Department of Molecular Mechanisms of Development, Institute of Cytology and Genetics SB RAS, Novosibirsk, 630090, Russia.,Department of Natural Sciences, Novosibirsk State University, Novosibirsk, 630090, Russia
| | - I N Lebedev
- Research Institute of Medical Genetics, Tomsk National Research Medical Center, Ushaika Street 10, Tomsk, 634050, Russia.,Department of Medical Genetics, Siberian State Medical University, Tomsk, 634050, Russia
| |
Collapse
|