scholarly journals Bardet-Biedl syndrome due to a pathogenic mutation on CEP290 and an unreported TTC8 variant

2018 ◽  
Author(s):  
Samantha Karlin
Keyword(s):  
Autosomal Recessive ◽  
Pathogenic Mutation ◽  
Incomplete Penetrance ◽  
Male Hypogonadism ◽  
Current Management ◽  
Bardet Biedl Syndrome ◽  
Excessive Weight ◽  
Mutation Database ◽  
Heterozygous Variant ◽  
Its Gene

Bardet-Biedl syndrome (BBS) is a rare autosomal recessive or triallelic ciliopathy disorder characterized by obesity, male hypogonadism, renal impairment, polydactyly, and intellectual disability. We present a case report of an African-American male with excessive weight gain and prediabetes who was referred to Genetics at 2½ years of age. Physical exam findings included obesity, macrocephaly, bilateral macrotia, brachydactyly, and small genitalia. Gene sequencing identified two mutations highly suggestive of BBS: a heterozygous variant in the CEP290 gene (c.4393 C>T) and a heterozygous variant in the TTC8 gene (c.1021 C>T). Twenty-one genes have been associated with the 21 types of BBS to date, all demonstrating variable expressivity and incomplete penetrance. There is no cure for BBS, and current management focuses on preventing and treating symptoms. CEP290 mutations are associated with BBS type 14, and only 1% of affected individuals carry a mutation on this gene. TTC8 mutations are associated with BBS type 8, and its gene frequency is also 1% in individuals with BBS. The TTC8 variant found in our propositus (p.Arg341Trp) has not been previously reported in the Human Gene Mutation Database. In this variant, tryptophan replaces the normal arginine at position 341 of the TTC8 protein. To our knowledge, this is the first report linking this specific TTC8 variant with BBS. Keywords: Bardet-Biedl Syndrome, Ciliopathy disorder, Childhood obesity, Genetic obesity, CEP290, TTC8

Bardet-Biedl syndrome due to a pathogenic mutation on CEP290 and an unreported TTC8 variant

2018 ◽  
Author(s):  
Samantha Karlin
Keyword(s):  
Autosomal Recessive ◽  
Pathogenic Mutation ◽  
Incomplete Penetrance ◽  
Male Hypogonadism ◽  
Current Management ◽  
Bardet Biedl Syndrome ◽  
Excessive Weight ◽  
Mutation Database ◽  
Heterozygous Variant ◽  
Its Gene

Bardet-Biedl syndrome (BBS) is a rare autosomal recessive or triallelic ciliopathy disorder characterized by obesity, male hypogonadism, renal impairment, polydactyly, and intellectual disability. We present a case report of an African-American male with excessive weight gain and prediabetes who was referred to Genetics at 2½ years of age. Physical exam findings included obesity, macrocephaly, bilateral macrotia, brachydactyly, and small genitalia. Gene sequencing identified two mutations highly suggestive of BBS: a heterozygous variant in the CEP290 gene (c.4393 C>T) and a heterozygous variant in the TTC8 gene (c.1021 C>T). Twenty-one genes have been associated with the 21 types of BBS to date, all demonstrating variable expressivity and incomplete penetrance. There is no cure for BBS, and current management focuses on preventing and treating symptoms. CEP290 mutations are associated with BBS type 14, and only 1% of affected individuals carry a mutation on this gene. TTC8 mutations are associated with BBS type 8, and its gene frequency is also 1% in individuals with BBS. The TTC8 variant found in our propositus (p.Arg341Trp) has not been previously reported in the Human Gene Mutation Database. In this variant, tryptophan replaces the normal arginine at position 341 of the TTC8 protein. To our knowledge, this is the first report linking this specific TTC8 variant with BBS. Keywords: Bardet-Biedl Syndrome, Ciliopathy disorder, Childhood obesity, Genetic obesity, CEP290, TTC8

scholarly journals Bardet Biedl Syndrome: A Rare Case Report in a Tertiary Care Teaching Hospital, Dhaka, Bangladesh

2021 ◽  
Vol 3 (1) ◽  
pp. 11-14
Author(s):  
Sadia Saber ◽  
Mohammad Dabir Hossain ◽  
Mohammed Tarek Alam ◽  
Mohammad Monower Hossain ◽  
Suhail Gulzar
Keyword(s):  
Rare Case ◽  
Autosomal Recessive ◽  
Genetic Disorder ◽  
Tertiary Care ◽  
Consanguineous Marriage ◽  
Bardet Biedl Syndrome ◽  
Excessive Weight ◽  
Rare Case Report ◽  
Males And Females ◽  
Renal Abnormalities

Bardet Biedl Syndrome (BBS) is an infrequent ciliopathic autosomal recessive genetic disorder that produces many effects and affects various body systems. Consanguineous marriage is conventionally considered as the most frequent etiology. The primary characteristics of the disorder are gradual visual impairment caused by retinal abnormalities, excessive weight gain, learning disabilities, Postaxial Polydactyly, Hypogonadism in males, renal abnormalities (kidney malformations and/or malfunctions). It affects both males and females. There is currently no specific cure for BBS but children with BBS benefit greatly from therapies like physical, occupational, speech and vision services. We, here, have presented a young boy of 15 years with the features of Bardet Biedl Syndrome.

scholarly journals Bardet Biedl Syndrome- A Case Report

1970 ◽  
Vol 20 (1) ◽  
pp. 56-59
Author(s):  
M Azizul Haque ◽  
LS Sharmin ◽  
Q Tarikul Islam ◽  
ARM Saifuddin Ekram
Keyword(s):  
Mental Retardation ◽  
Case Report ◽  
Autosomal Recessive ◽  
Wide Spectrum ◽  
Retinal Dystrophy ◽  
Male Hypogonadism ◽  
Bardet Biedl Syndrome ◽  
Autosomal Recessive Condition ◽  
Characteristic Features ◽  
Criteria For Diagnosis

Bardet Biedl syndrome is a rare autosomal recessive condition with a wide spectrum of clinical features. The accepted major criteria for diagnosis include retinal dystrophy, obesity, polydactyly, male hypogonadism, mental retardation and renal dysfunction. We have presented a 16 year old male patient exhibiting characteristic features of Bardet Biedl syndrome (BBS) and then the literature is reviewed.   doi: 10.3329/taj.v20i1.3092 TAJ 2007; 20(1):56-59

The combined novel KCNQ1 frameshift I145Sfs*92 and nonsense W392X variants caused Jervell and Lange-Nielsen syndrome in a Chinese infant presenting with sustained foetal bradycardia

EP Europace ◽  
2020 ◽  
Vol 22 (12) ◽  
pp. 1880-1884
Author(s):  
Yanmin Zhang ◽  
Xiaomin Li ◽  
Ying Yang ◽  
Jie Wang ◽  
Xinru Gao ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Autosomal Dominant ◽  
Autosomal Recessive Inheritance ◽  
Autosomal Dominant Inheritance ◽  
Incomplete Penetrance ◽  
Recessive Inheritance ◽  
Dominant Inheritance ◽  
Heterozygous Variant ◽  
Bilateral Sensorineural Hearing Loss ◽  
Electrocardiogram Ecg

Abstract Aims We report clinical and molecular analysis of an infant presenting with foetal bradycardia and clinical outcome of Jervell and Lange-Nielsen syndrome (JLNS). Methods and results Clinical, electrocardiogram (ECG), and echocardiographic data were collected from members in a three-generation family. Whole exomes were amplified and sequenced for proband. The identified variants were verified in the remaining members. The pathogenicity of candidate variants was predicted using multiple software programmes. A 28-year-old non-consanguineous Chinese woman at 23 weeks’ gestation presenting with sustained foetal bradycardia of 100 b.p.m. Immunological disorders and infection were excluded. The infant was delivered at 37 weeks’ gestation with 2700-g birthweight. QTc was prolonged in both ECG and Holter recording. Hearing tests confirmed bilateral sensorineural hearing loss. Genetic testing demonstrated that the infant carried a novel frameshift c.431delC (p.I145Sfs*92) and a novel nonsense c.1175G>A (p.W392X) compound variants of KCNQ1 inherited from mother and father, respectively, in autosomal recessive inheritance. Only relative II-5 carrying heterozygous KCNQ1-I145Sfs*92 variant had prolonged QTc, while the other carriers did not have prolonged QT, suggesting an autosomal dominant inheritance of LQT1 phenotype with incomplete penetrance in the family. Conclusion We report the novel frameshift KCNQ1-I145Sfs*92 and nonsense KCNQ1-W392X compound variants in autosomal recessive inheritance that caused JLNS presenting as sustained foetal bradycardia for the first time. Meanwhile, KCNQ1-I145Sfs*92 heterozygous variant demonstrated LQT1 phenotype in autosomal dominant inheritance with incomplete penetrance.

scholarly journals A Novel Intronic Pathogenic Variant in STAR With a Dominant Negative Mechanism Causes Attenuated Lipoid Congenital Adrenal Hyperplasia

2021 ◽  
Vol 9 ◽  
pp. 232470962110146
Author(s):  
Erin Finn ◽  
Kimberly Kripps ◽  
Christina Chambers ◽  
Michele Rapp ◽  
Naomi J. L. Meeks ◽  
...  
Keyword(s):  
Congenital Adrenal Hyperplasia ◽  
Autosomal Recessive ◽  
De Novo ◽  
Dominant Negative ◽  
Adrenal Hyperplasia ◽  
Primary Adrenal Insufficiency ◽  
Heterozygous Variant ◽  
Novel Variant ◽  
Autosomal Recessive Condition ◽  
Clinically Significant

Lipoid congenital adrenal hyperplasia (LCAH) is typically inherited as an autosomal recessive condition. There are 3 reports of individuals with a dominantly acting heterozygous variant leading to a clinically significant phenotype. We report a 46,XY child with a novel heterozygous intronic variant in STAR resulting in LCAH with an attenuated genital phenotype. The patient presented with neonatal hypoglycemia and had descended testes with a fused scrotum and small phallus. Evaluation revealed primary adrenal insufficiency with deficiencies of cortisol, aldosterone, and androgens. He was found to have a de novo heterozygous novel variant in STAR: c.65-2A>C. We report a case of a novel variant and review of other dominant mutations at the same position in the literature. Clinicians should be aware of the possibility of attenuated genital phenotypes of LCAH and the contribution of de novo variants in STAR at c.65-2 to the pathogenesis of that phenotype.

scholarly journals Siblings with Bardet Beidl Syndrome

2013 ◽  
Vol 33 (3) ◽  
pp. 236-238
Author(s):  
Ram Peter ◽  
Priya Jose ◽  
MNG Nair
Keyword(s):  
Clinical Features ◽  
Autosomal Recessive ◽  
Clinical Presentation ◽  
The Body ◽  
Bardet Biedl Syndrome ◽  
Recessive Condition ◽  
Autosomal Recessive Condition

Bardet Biedl syndrome is an autosomal recessive condition affecting many parts of the body. Incidence of BBS is 1 in 100000. Its clinical features varies in person to person though from same family too. We are reporting two siblings with Bardet Beidl syndrome with different clinical presentation. DOI: http://dx.doi.org/10.3126/jnps.v33i3.8081   J. Nepal Paediatr. Soc. 2013;33(3):236-238

Molecular genetic diagnostics of Bardet-Biedl syndrome with an MPS-panel

2021 ◽  
pp. 26-35
Author(s):  
М.Д. Орлова ◽  
П. Гундорова ◽  
А.В. Поляков
Keyword(s):  
Autosomal Recessive ◽  
Molecular Genetic ◽  
Autosomal Recessive Disorder ◽  
Genetic Diagnostics ◽  
Bardet Biedl Syndrome ◽  
Pathogenic Variants ◽  
Development Delay ◽  
Molecular Genetic Diagnostics ◽  
First Time

Синдром Барде-Бидля - аутосомно-рецессивное заболевание, характеризующееся ожирением, пигментной дегенерацией сетчатки, полидактилией, задержкой психоречевого развития и структурными повреждениями почек. В работе представлены результаты применения МПС-панели, включающей кодирующие последовательности и прилегающие интронные области 21 гена, ассоциированного с синдромом Барде-Бидля. Впервые была проведена молекулярно-генетическая диагностика в группе из сорока российских пациентов с синдромом Барде-Бидля из неродственных семей. В результате исследования удалось подтвердить диагноз молекулярно-генетическим методом у 40% пациентов (n=16). В генах BBS1, BBS7 и BBS10 встретились повторяющиеся варианты. Частота встречаемости патогенных и вероятно патогенных вариантов в генах BBS1 и BBS10 у российских пациентов соответствует зарубежным данным. Варианты в гене BBS7 встретились у пяти человек, у четырех из них был обнаружен патогенный вариант c.1967_1968delTAinsC, не встречающийся в других популяциях. Результаты, представленные в статье, показывают значительный вклад в заболеваемость синдромом Барде-Бидля в российской популяции патогенных вариантов в гене BBS7. Bardet-Biedl syndrome is an autosomal recessive disorder characterized by obesity, retinitis pigmentosa, polydactyly, development delay, and structural kidney defects. This study shows the results of using an MPS panel that includes coding sequences and intronic areas of 21 genes associated with Bardet-Biedl syndrome. For the first time molecular genetic testing has been provided for the group of 40 Russian patiens with Bardet-Biedl syndrome from unrelated families. As a result of the testing, diagnoses were confirmed for 40% of the patients (n=16). The genes BBS1, BBS7, BBS10 had recurrent variants. The frequency of pathogenic and likely pathogenic variants in the genes BBS1 and BBS10 among Russian patients matches the research data in other countries. Variants in the BBS7 gene were found for five people, four of them had a pathogenic variant c.1967_1968delTAinsC, which is not present among other populations. Results provided in this article show the significant role of pathogenic variants in the BBS7 gene in patients with Bardet-Biedl syndrome in Russian population.

scholarly journals A Novel GDAP1 Mutation 439delA is Associated with Autosomal Recessive CMT Disease

2006 ◽  
Vol 33 (3) ◽  
pp. 311-316 ◽  
Author(s):  
Domna-Maria Georgiou ◽  
Paschalis Nicolaou ◽  
David Chitayat ◽  
Pantelitsa Koutsou ◽  
Riyana Babul-Hirji ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Autosomal Dominant ◽  
Molecular Genetic ◽  
Sensory Neuropathy ◽  
Pathogenic Mutation ◽  
Chromosome 8 ◽  
Consanguineous Family ◽  
Single Nucleotide ◽  
The Family ◽  
Neuropathological Criteria

Background:Charcot-Marie-Tooth (CMT) disease is the most common form of inherited motor and sensory neuropathy. Based on neurophysiological and neuropathological criteria CMT has been sub-classified into two main types: demyelinating and axonal. Furthermore, it is genetically heterogeneous with autosomal dominant, autosomal recessive (AR) and X-linked modes of inheritance. Thus far, seven genes have been identified in association with the demyelinating AR-CMT disease. We hereby report our clinical and molecular genetic findings in a consanguineous family with AR-CMT.Methods:Two young sisters with AR-CMT and other non-affected family members were clinically and electrophysiologically evaluated and then molecular genetic investigation was carried out in order to identify the pathogenic mutation.Results:Following an initial indication for linkage of the family to the CMT4A locus on chromosome 8, we sequenced the Ganglioside-induced differentiation-associated protein 1 (GDAP1) gene and identified a single nucleotide deletion in exon 3 that is associated with AR-CMT in the family.Conclusion:We identified a novel GDAP1 439delA mutation that is associated with AR-CMT in a consanguineous family of Iranian descent with two affected young girls and a history in other members of the family.

P3.51 A new form of autosomal recessive myopathy associated with male hypogonadism links to chromosome 11q

2011 ◽  
Vol 21 (9-10) ◽  
pp. 697-698
Author(s):  
N.F. Clarke ◽  
C.J. Bromhead ◽  
M. Bahlo ◽  
K.N. North
Keyword(s):  
Autosomal Recessive ◽  
Male Hypogonadism ◽  
New Form

scholarly journals Allgrove syndrome: how to suspect the problem? Endocrinologists experience

2020 ◽  
Vol 66 (1) ◽  
pp. 64-69
Author(s):  
Natalya I. Volkova ◽  
Ilya Y. Davidenko ◽  
Igor B. Reshetnikov ◽  
Snezhana S. Brovkina
Keyword(s):  
Adrenal Insufficiency ◽  
Neurological Disorders ◽  
Autosomal Recessive ◽  
Clinical Observation ◽  
Pathogenic Mutation ◽  
Multisystem Disease ◽  
Allgrove Syndrome ◽  
Interdisciplinary Interaction ◽  
Over Time

Allgrove syndrome (Alacrimia, Achalasia, Adrenal insufficiency, AAAS) is a rare autosomal recessive multisystem disease characterized by chronic adrenal insufficiency, alacrimia and achalasia of the cardia. This disease is often associated with various neurological disorders, amyotrophy, in such cases, it is named 4A and 5A syndrome, but sometimes there is also 2A syndrom. The occurrence of the disease is due to a mutation in the gene AAAS (12q13), which encodes the protein ALADIN. Here is a clinical observation of a patient with Allgrove syndrome. The patient had a typical clinic: alacrimia, achalasia, adrenal insufficiency, convulsive syndrome. However, a neurological disorder, manifested by convulsive syndrome, passed with time. Despite the full clinical picture, the diagnosis was made only after 14 years. Allgrove syndrome was verified through genetic analysis revealed a pathogenic mutation c.43CT gene AAAS. Progression of the severity of alacrimia and need of glucocorticoids over time was noted. We shown the difficulty of diagnosis is due to the lack of awareness of clinicians about the disease, the importance of interdisciplinary interaction, as well as the need for follow-up of such patients.

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