scholarly journals RAB33B and PCNT variants in two Pakistani families with skeletal dysplasia and short stature

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Noor ul Ain ◽  
Zunaira Fatima ◽  
Sadaf Naz ◽  
Outi Makitie

Abstract Background Skeletal dysplasia is a heterogeneous group of disorders resulting from different genetic variants in humans. The current study was designed to identify the genetic causes of skeletal dysplasia and short stature in two consanguineous families from Pakistan, both comprised of multiple affected individuals. Patients in one family had proportionate short stature with reduced head circumference while affected individuals in the other family had disproportionate short stature. Methods Clinical data were obtained and radiological examinations of the index patients were completed. Whole genome sequencing for probands from both families were performed followed by Sanger sequencing to confirm segregation of identified variants in the respective families. In-silico pathogenicity score prediction for identified variant and amino acid conservation analysis was completed. Results Whole Genome Sequencing identified a known biallelic variant c.6176_6189delGTCAGCTGCCGAAG; p.(Gln2060ArgfsTer48) in PCNT gene and a novel biallelic variant c.174delC; p.(Asp60ThrfsTer7) in RAB33B gene respectively in affected members of the two families. Clinical imaging revealed platyspondyly and varus deformity in the legs of the affected members in the first family. Radiographs indicated severe platyspondyly, genu valgus deformity of legs and pectus carinatum for the patients in the second family. Conclusion In this study we report the phenotypes and genetic variants in two unrelated families with two distinct forms of skeletal dysplasia. This study strengthens the previous findings that patients harboring PCNT variants are phenotypically homogeneous and also extends the genotypic spectrum of RAB33B variants.

2013 ◽  
Vol 93 (2) ◽  
pp. 249-263 ◽  
Author(s):  
Yong-hui Jiang ◽  
Ryan K.C. Yuen ◽  
Xin Jin ◽  
Mingbang Wang ◽  
Nong Chen ◽  
...  

Author(s):  
Е.А. Булыгина ◽  
О.В. Борисов ◽  
Е.В. Валеева ◽  
Е.А. Семенова ◽  
А.К. Ларин ◽  
...  

Применение технологии полногеномного секвенирования предоставляет обширные возможности для обнаружения новых генетических маркеров, определяющих результативность спортсмена. Целью исследования является определение особенностей геномного профиля спортсменов высокого класса и выявление генетических вариантов, ассоциированных с некоторыми функциональными показателями, влияющими на спортивную успешность. Впервые проведено секвенирование геномов 20 профессиональных борцов татарской национальности. Найденные генетические варианты валидированы с использованием ДНК-микрочипов и/или импутации. Из всего спектра полиморфных вариантов отобраны мутации в гомозиготном состоянии, имеющие аннотацию «stop gain» (нонсенс-мутации) и показавшие ассоциацию со следующими фенотипами: мышечная масса, пиковая мощность нижних конечностей, время реакции и спринтерские способности. Частоты встречаемости мутантных аллелей таких вариантов сравнивались с частотами в других популяциях Волго-Уральского региона. В геномах борцов найдено около 11 млн полиморфных локусов, в среднем 3,62 млн однонуклеотидных замен и 617 тыс инделов на геном. Из них 347 вариантов потенциально вызывают преждевременную терминацию трансляции белка. Корреляция со спортивными фенотипами была выявлена для 6 нонсенс-мутаций (гены ANKDD1B, SLC6A18, CCHCR1, VOPP1, ADAMTS12 и ZACN), в гомозиготном состоянии приводящих к достоверному изменению функциональных показателей спортсменов. У носителей замены p.Tyr319* (rs7447815) в гене SLC6A18 обнаружено снижение относительной пиковой мощности нижних конечностей. В то же время у борцов-татар была зарегистрирована меньшая частота мутантного аллеля в этом локусе по сравнению с башкирами и русскими. Также, согласно исследованиям GWAS, замена rs7447815 ассоциирована с риском развития остеоартроза и пониженной физической активностью. Количество полиморфных вариантов, найденных в геномах спортсменов, и доля нонсенс-мутаций в них соотносятся с результатами, описанными для других популяций. Нонсенс-мутация p.Tyr319* (rs7447815) в гене SLC6A18 является потенциальным маркером, ухудшающим значение относительной пиковой мощности нижних конечностей. The use of whole-genome sequencing technology provides extensive opportunities for the detection of new genetic markers that determine athletic performance. The aim of the study was to characterize the genome profile of high-class athletes and to identify genetic variants associated with some functional variables which can affect sports success. Materials and methods. For the first time, whole-genome sequencing of 20 professional belt wrestlers of Tatar nationality was carried out. Genetic variants were validated using microarray technology and/or imputation procedure. From the entire spectrum of variants those that were annotated as nonsense mutations, were found at the homozygous state and showed association with muscle mass, lower-extremity peak power, reaction time, and sprinting abilities were selected. The mutant allele frequencies of these variants were compared with the frequencies in other populations of the Volga-Ural region. Results. About 11 million polymorphic loci were found in the genomes of wrestlers, an average of 3.62 million single nucleotide polymorphisms and 617 thousand indels per genome. Of these, 347 variants potentially cause premature termination of protein translation. Correlation with sports phenotypes was found for 6 nonsense mutations (ANKDD1B, SLC6A18, CCHCR1, VOPP1, ADAMTS12, and ZACN genes), which in a homozygous state lead to significant changes in functional indicators of athletes. Wrestlers with p.Tyr319* (rs7447815) substitution in the SLC6A18 gene had decreased relative lower-extremity peak power. At the same time, a lower mutant allele frequency at this locus was registered in Tatar wrestlers compared to the Bashkirs and Russians. Also, according to the GWAS, the rs7447815 substitution is associated with the risk of osteoarthritis and decreased physical activity. Conclusions. The number of polymorphic variants found in the genomes of athletes and the proportion of nonsense mutations in them correlate with the results described for other populations. The nonsense mutation p.Tyr319* (rs7447815) in the SLC6A18 gene is a potential marker that reduces the relative peak power of the lower extremities.


Author(s):  
Chuang-Wei Wang ◽  
Wichittra Tassaneeyakul ◽  
Chun-Bing Chen ◽  
Wei-Ti Chen ◽  
Yu-Chuan Teng ◽  
...  

Heart ◽  
2012 ◽  
Vol 98 (Suppl 1) ◽  
pp. A64.1-A64 ◽  
Author(s):  
J C Chambers ◽  
S T Tan ◽  
W H Zhang ◽  
J Sehmi ◽  
A Al-Hussaini ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jong-Ho Park ◽  
Shinn-Won Lim ◽  
Woojae Myung ◽  
Inho Park ◽  
Hyeok-Jae Jang ◽  
...  

AbstractAchieving remission following initial antidepressant therapy in patients with major depressive disorder (MDD) is an important clinical result. Making predictions based on genetic markers holds promise for improving the remission rate. However, genetic variants found in previous genetic studies do not provide robust evidence to aid pharmacogenetic decision-making in clinical settings. Thus, the objective of this study was to perform whole-genome sequencing (WGS) using genomic DNA to identify genetic variants associated with the treatment outcomes of selective serotonin reuptake inhibitors (SSRIs). We performed WGS on 100 patients with MDD who were treated with escitalopram (discovery set: 36 remitted and 64 non-remitted). The findings were applied to an additional 553 patients with MDD who were treated with SSRIs (replication set: 185 remitted and 368 non-remitted). A novel loss-of-function variant (rs3213755) in keratin-associated protein 1–1 (KRTAP1-1) was identified in this study. This rs3213755 variant was significantly associated with remission following antidepressant treatment (p = 0.0184, OR 3.09, 95% confidence interval [CI] 1.22–7.80 in the discovery set; p = 0.00269, OR 1.75, 95% CI 1.22–2.53 in the replication set). Moreover, the expression level of KRTAP1-1 in surgically resected human temporal lobe samples was significantly associated with the rs3213755 genotype. WGS studies on a larger sample size in various ethnic groups are needed to investigate genetic markers useful in the pharmacogenetic prediction of remission following antidepressant treatment.


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