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Sheth J, Nair A, Jee B. Lysosomal storage disorders: from biology to the clinic with reference to India. THE LANCET REGIONAL HEALTH. SOUTHEAST ASIA 2023; 9:100108. [PMID: 37383036 PMCID: PMC10305895 DOI: 10.1016/j.lansea.2022.100108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 09/20/2022] [Accepted: 10/27/2022] [Indexed: 06/30/2023]
Abstract
Lysosomal storage disorders (LSDs) are a group of seventy different metabolic storage diseases due to accumulation of substrate mainly in the form of carbohydrate, lipids, proteins, and cellular debris. They occur due to variant in different genes that regulate lysosomal enzymes synthesis, transport, and secretion. In recent years, due to an increased availability of various therapies to treat these disorders, and increased diagnostic tools, there has been an escalated awareness of LSDs. Due to heterogeneous population and various social reasons, India is likely to have a high frequency of LSDs. Therefore, to understand the burden of various LSDs, its molecular spectrum, and understanding the phenotype-genotype correlation, Indian Council of Medical Research (ICMR) and Department of Health Research (DHR), Government of India had set up a task force in the year 2015. It has resulted in identifying common LSDs, and founder variant for some of the storage disorders and molecular spectrum of various LSDs across the country. This review describes in detail the spectrum of LSDs, its molecular epidemiology and prevention in context to Indian population.
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Affiliation(s)
- Jayesh Sheth
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad 380015, India
| | - Aadhira Nair
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad 380015, India
| | - Babban Jee
- Department of Health Research, Ministry of Health and Family Welfare, Government of India, 2nd Floor, IRCS Building, Red Cross Road, New Delhi 110001, India
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Lysosomal storage disorders: Novel and frequent pathogenic variants in a large cohort of Indian patients of Pompe, Fabry, Gaucher and Hurler disease. Clin Biochem 2020; 89:14-37. [PMID: 33301762 DOI: 10.1016/j.clinbiochem.2020.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 12/04/2020] [Accepted: 12/04/2020] [Indexed: 12/31/2022]
Abstract
OBJECTIVES Diagnosis of lysosomal storage disorders (LSDs) remains challenging due to wide clinical, biochemical and molecular heterogeneity. The study applies a combined biochemical and genetic approach to diagnose symptomatic Indian patients of Pompe, Fabry, Gaucher and Hurler disease to generate a comprehensive dataset of pathogenic variants for these disorders. DESIGN & METHODS Symptomatic patients were biochemically diagnosed by fluorometric methods and molecular confirmation was carried out by gene sequencing. Genetic variants were analyzed according to the ACMG/AMP 2015 variant interpretation guidelines. RESULTS Amongst the 2181 suspected patients, 285 (13%) were biochemically diagnosed. Of these, 22.5% (64/285) diagnosed with Pompe disease harboured c.1933G>A, c.1A>G, c.1927G>A and c.2783G>C as common and 10 novel pathogenic variants while 7.4% (21/285) patients diagnosed with Fabry disease carried c.851T>C, c.902G>A, c.905A>C and c.1212_1234del as frequent disease-causing variants along with 7 novel pathogenic variants. As many as 48.4% (138/285) patients were diagnosed with Gaucher disease and had c.1448T>C as the most common pathogenic variant followed by c.1342G>C and c.754T>C with 7 previously unreported disease-causing variants and in the 21.7% (62/285) diagnosed cases of Hurler disease, c.1469T>C, c.754delC c.568_581del and c.1898C>T were identified as the most common causative variants along with 21 novel pathogenic variants. CONCLUSION This comprehensive data set of disease-causing frequent and novel pathogenic variants reported for the first time in such a large patient cohort for each of these four LSDs from the Indian sub-continent, along with their biochemical and clinical spectrum will contribute towards providing definitive diagnosis and treatment, identifying carrier status, as well as in counselling prenatal cases to reduce the morbidity and mortality associated with these disorders.
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Singh K, Bijarnia-Mahay S, Ramprasad VL, Puri RD, Nair S, Sharda S, Saxena R, Kohli S, Kulshreshtha S, Ganguli I, Gujral K, Verma IC. NGS-based expanded carrier screening for genetic disorders in North Indian population reveals unexpected results - a pilot study. BMC MEDICAL GENETICS 2020; 21:216. [PMID: 33138774 PMCID: PMC7607710 DOI: 10.1186/s12881-020-01153-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 10/20/2020] [Indexed: 12/25/2022]
Abstract
Background To determine the carrier frequency and pathogenic variants of common genetic disorders in the north Indian population by using next generation sequencing (NGS). Methods After pre-test counselling, 200 unrelated individuals (including 88 couples) were screened for pathogenic variants in 88 genes by NGS technology. The variants were classified as per American College of Medical Genetics criteria. Pathogenic and likely pathogenic variants were subjected to thorough literature-based curation in addition to the regular filters. Variants of unknown significance were not reported. Individuals were counselled explaining the implications of the results, and cascade screening was advised when necessary. Results Of the 200 participants, 52 (26%) were found to be carrier of one or more disorders. Twelve individuals were identified to be carriers for congenital deafness, giving a carrier frequency of one in 17 for one of the four genes tested (SLC26A4, GJB2, TMPRSS3 and TMC1 in decreasing order). Nine individuals were observed to be carriers for cystic fibrosis, with a frequency of one in 22. Three individuals were detected to be carriers for Pompe disease (frequency one in 67). None of the 88 couples screened were found to be carriers for the same disorder. The pathogenic variants observed in many disorders (such as deafness, cystic fibrosis, Pompe disease, Canavan disease, primary hyperoxaluria, junctional epidermolysis bullosa, galactosemia, medium chain acyl CoA deficiency etc.) were different from those commonly observed in the West. Conclusion A higher carrier frequency for genetic deafness, cystic fibrosis and Pompe disease was unexpected, and contrary to the generally held view about their prevalence in Asian Indians. In spite of the small sample size, this study would suggest that population-based carrier screening panels for India would differ from those in the West, and need to be selected with due care. Testing should comprise the study of all the coding exons with its boundaries in the genes through NGS, as all the variants are not well characterized. Only study of entire coding regions in the genes will detect carriers with adequate efficiency, in order to reduce the burden of genetic disorders in India and other resource poor countries. Supplementary Information The online version contains supplementary material available at 10.1186/s12881-020-01153-4.
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Affiliation(s)
- Kanika Singh
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Sunita Bijarnia-Mahay
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India.
| | | | - Ratna Dua Puri
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Sandhya Nair
- Medgenome Laboratories Pvt Ltd., Bangalore, India
| | | | - Renu Saxena
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Sudha Kohli
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Samarth Kulshreshtha
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Indrani Ganguli
- Institute of Obstetrics and Gynaecology, Sir Ganga Ram Hospital, New Delhi, India
| | - Kanwal Gujral
- Institute of Obstetrics and Gynaecology, Sir Ganga Ram Hospital, New Delhi, India
| | - Ishwar C Verma
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India.
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Du X, Ding Q, Chen Q, Guo P, Wang Q. Three mutations of adult type 1 Gaucher disease found in a Chinese patient: A case report. Medicine (Baltimore) 2018; 97:e13161. [PMID: 30461613 PMCID: PMC6393014 DOI: 10.1097/md.0000000000013161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
RATIONALE Gaucher disease (GD), characterized by glucosylceramide accumulation in the macrophage-monocyte system, is caused by glucosidase b acid (GBA) gene mutations which lead to the deficiency of lysosomal enzyme glucocerebrosidase. The mutation spectrum of GBA in Chinese patients is quite different from those seen in Jewish and non-Jewish Caucasian patients. Thus, it is relatively hard to diagnose GD in Chinese. PATIENT CONCERNS A 24-year-old Chinese female with intermittent abdominal distension and progressive decrease in strength but without neurologic symptoms was initially referred for femoral head necrosis on the right feet. Laboratory examinations results indicated panhematopenia. Bone marrow aspiration smear and biopsy specimen found typical "wrinkled" Gaucher cells. Molecular-genetic testing of GBA gene revealed 3 mutations including R159W (c. 475 C > T), V1230G (c. 689T > G), and G241A (c. 721G > A). DIAGNOSES On the basis of these findings and clinical manifestations, the final diagnosis of type 1 GD was made. INTERVENTIONS Enzyme replacement therapy (ERT) with velaglucerase α was carried out after the diagnosis of type 1 GD. OUTCOMES The platelet and hemoglobin levels were restored by ERT. LESSONS To our knowledge, this is the first report of GD patient carrying 3 mutations in Chinese. These mutations in GBA in the present case imply a potential pool of patients with GD with this mutation in Chinese.
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Affiliation(s)
- Xiaoli Du
- Department of Hematology, Gui Zhou Provincial People's Hospital
| | - Qian Ding
- Department of Hematology, Gui Zhou Provincial People's Hospital
| | - Qi Chen
- Department of Hematology, The affiliated Hospital of Zunyi Medical College, Guizhou, China
| | - Pengxiang Guo
- Department of Hematology, Gui Zhou Provincial People's Hospital
| | - Qing Wang
- Department of Hematology, Gui Zhou Provincial People's Hospital
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Sheth J, Pancholi D, Mistri M, Nath P, Ankleshwaria C, Bhavsar R, Puri R, Phadke S, Sheth F. Biochemical and molecular characterization of adult patients with type I Gaucher disease and carrier frequency analysis of Leu444Pro - a common Gaucher disease mutation in India. BMC MEDICAL GENETICS 2018; 19:178. [PMID: 30285649 PMCID: PMC6167838 DOI: 10.1186/s12881-018-0687-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 09/12/2018] [Indexed: 01/10/2023]
Abstract
Background Gaucher disease is a rare pan-ethnic disorder which occurs due to an increased accumulation of undegraded glycolipid glucocerebroside inside the cells’ lysosomes. A beta-Glucosidase (GBA) gene defect results in glucocerebrosidase enzyme deficiency. Though the disease is mainly diagnosed in childhood, the adult manifestation is often missed or identified late due to the failure to recognize the heterogeneous clinical presentation. The present study includes seven unrelated Indian adult patients (age range: 20–40 years) having splenomegaly, with or without hepatomegaly, cytopenia and bone abnormality. Methods The biochemical investigation implicated measuring plasma chitotriosidase enzyme activity followed by confirmatory test of β-Glucosidase enzyme activity from the leukocytes. The molecular characterization involved patients’ initial screening for the common Gaucher mutation (Leu444Pro). Later, all patients were subjected to whole GBA gene coding region study using bidirectional Sanger sequencing. The population screening for common Gaucher disease mutation (Leu444Pro) was executed in 1200 unrelated and healthy Indian subjects by Restriction Fragment Length Polymorphism-Polymerase Chain Reaction technique. The allele frequency was calculated using Hardy-Weinberg formula. Results The biochemical analysis revealed a significant reduction in the β-Glucosidase activity in all the patients. Also, an elevated level of plasma Chitotriosidase activity in five patients supported their diagnosis of Gaucher disease. Sanger sequencing established four patients with homozygous variation and three patients with compound heterozygous variation in GBA gene. This study uncovers two missense variants (Ala448Thr and Val17Gly) not previously reported in Gaucher disease patients. Also the known mutations like Leu444Pro, Arg329Cys, Asp315Asn, Ser125Arg, and Arg395Cys were identified in these patients. The homology modeling suggested the destabilization of the protein structure due to novel variants. The Leu444Pro mutation screening in the Indian population spotted two people as a carrier. This emerged the carrier frequency of 1:600 along with wild-type allele frequency 0.97113 and mutant allele frequency 0.02887. Conclusions The study reports novel and known variants identified in the GBA gene in seven adult patients. The given study is the first report on the carrier frequency of the Leu444Pro mutant allele in an Indian population which will help understanding the burden and susceptibility of Gaucher disease to affect next generation in India. Electronic supplementary material The online version of this article (10.1186/s12881-018-0687-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jayesh Sheth
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad, Gujarat, 380015, India.
| | - Dhairya Pancholi
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad, Gujarat, 380015, India
| | - Mehul Mistri
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad, Gujarat, 380015, India
| | - Payal Nath
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad, Gujarat, 380015, India
| | - Chitra Ankleshwaria
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad, Gujarat, 380015, India
| | - Riddhi Bhavsar
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad, Gujarat, 380015, India
| | - Ratna Puri
- Center of Medical Genetics, Sir Ganga Ram Hospital, Rajinder Nagar, New Delhi, 110060, India
| | - Shubha Phadke
- Sanjay Gandhi Post Graduate Institute of Medical Science, Lucknow, Uttar Pradesh, 226014, India
| | - Frenny Sheth
- FRIGE's Institute of Human Genetics, FRIGE House, Jodhpur Gam Road, Satellite, Ahmedabad, Gujarat, 380015, India
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Diagnosis and Management of Gaucher Disease in India – Consensus Guidelines of the Gaucher Disease Task Force of the Society for Indian Academy of Medical Genetics and the Indian Academy of Pediatrics. Indian Pediatr 2018. [DOI: 10.1007/s13312-018-1249-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Abstract
Justification
Gaucher disease (GD) is amongst the most frequently occurring lysosomal storage disorder in all ethnicities. The clinical manifestations and natural history of GD is highly heterogeneous with extreme geographic and ethnic variations. The literature on GD has paucity of information and optimal management guidelines for Indian patients.
Process
Gaucher Disease Task Force was formed under the auspices of the Society for Indian Academy of Medical Genetics. Invited experts from various specialties formulated guidelines for the management of patients with GD. A writing committee was formed and the draft guidelines were circulated by email to all members for comments and inputs. The guidelines were finalized in December 2016 at the annual meeting of the Indian Academy of Medical Genetics.
Objectives
These guidelines are intended to serve as a standard framework for treating physicians and the health care systems for optimal management of Gaucher disease in India and to define unique needs of this patient population.
Recommendations
Manifestations of GD are protean and a high index of suspicion is essential for timely diagnosis. Patients frequently experience diagnostic delays during which severe irreversible complications occur. Leucocyte acid β-glucosidase activity is mandatory for establishing the diagnosis of Gaucher disease; molecular testing can help identify patients at risk of neuronopathic disease. Enzyme replacement therapy for type 1 and type 3 Gaucher disease is the standard of care. Best outcomes are achieved by early initiation of therapy before onset of irreversible complications. However, in setting of progressive neurological symptoms such as seizures and or/neuroregression, ERT is not recommended, as it cannot cross the blood brain barrier. The recommendations herein are for diagnosis, for initiation of therapy, therapeutic goals, monitoring and follow up of patients. We highlight that prevention of recurrence of the disease through genetic counseling and prenatal diagnosis is essential in India, due to uniformly severe phenotypes encountered in our population.
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Drugan C, Drugan T, Caillaud C, Grigorescu-Sido P, Nistor T, Crăciun AM. Laboratory diagnosis and follow-up of Romanian Gaucher disease patients. REV ROMANA MED LAB 2017. [DOI: 10.1515/rrlm-2017-0018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Background: Gaucher disease (GD) is caused by a recessively inherited deficiency of glucocerebrosidase which is encoded by the GBA gene in which nearly 450 mutations have been described. However, only a few genotype- phenotype correlations have been clearly established. The aim of this study was to investigate molecular features of GD in Romanian patients and to evaluate their impact on treatment response. Material and methods: 69 patients, diagnosed between 1997 and 2014 at our national referral laboratory, were included in this study. Frequent point mutations (N370S, L444P, 84GG, R463C) were detected by amplification and restriction enzyme digestion. Recombinant alleles (recTL, recNciI, recA456P) were screened by DNA sequencing. Plasma chitotriosidase served as a biomarker of disease severity throughout the follow-up period. Results: 66 patients had the non-neuronopathic (type 1) form of GD and 3 had the chronic neuronopathic (type 3) phenotype. We identified 79% of the mutant alleles, among which the most frequent mutations were N370S (54%) and L444P (18%). We found a statistically significant (p<0.001) and moderate to good correlation between the total therapeutic dose and the residual chitotriosidase activity (R = 0.621). After two years of treatment, we noticed statistically significant variations in chitotriosidase activity corresponding to the most frequent genotypes (N370S/ unknown allele, N370S/L444P, N370S/N370S and N370S/R463Q). Conclusions: Allele distribution displayed specific features in Romanian GD patients, such as the high prevalence of the N370S allele. Chitotriosidase activity measurement allowed the investigation of genotype influence on treatment outcome.
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Affiliation(s)
- Cristina Drugan
- Department of Medical Biochemistry, „Iuliu Haţieganu“ University of Medicine and Pharmacy, Cluj-Napoca , Romania
| | - Tudor Drugan
- Department of Medical Informatics and Biostatistics, „Iuliu Haţieganu“ University of Medicine and Pharmacy, Cluj-Napoca , Romania
| | - Catherine Caillaud
- Laboratoire de Biochimie, Métabolomique et Protéomique, Hôpital Necker‐Enfants Malades, University Paris Descartes , France
| | - Paula Grigorescu-Sido
- Department of Paediatrics I, „Iuliu Haţieganu“ University of Medicine and Pharmacy, Cluj-Napoca , Romania
| | - Tiberiu Nistor
- Department of Medical Biochemistry, „Iuliu Haţieganu“ University of Medicine and Pharmacy, Cluj-Napoca , Romania
| | - Alexandra M. Crăciun
- Department of Medical Biochemistry, „Iuliu Haţieganu” University of Medicine and Pharmacy, Cluj-Napoca , Romania
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Hoitsema K, Amato D, Khan A, Sirrs S, Choy FYM. Identification of novel splice site mutation IVS9 + 1(G > A) and novel complex allele G355R/R359X in Type 1 Gaucher patients heterozygous for mutation N370S. Meta Gene 2016; 9:47-51. [PMID: 27222815 PMCID: PMC4856859 DOI: 10.1016/j.mgene.2016.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/27/2016] [Accepted: 03/17/2016] [Indexed: 11/30/2022] Open
Abstract
Gaucher disease is an autosomal recessive lysosomal storage disorder resulting from deficient glucocerebrosidase activity. More than 350 mutations that cause Gaucher disease have been described to date. Novel mutations can potentially provide insight into the glucocerebrosidase structure–function relationship and biochemical basis of the disease. Here, we report the identification of two novel mutations in two unrelated patients with type I (non-neuronopathic) Gaucher disease: 1) a splice site mutation IVS9 + 1G > A; and (2) a complex allele (cis) G355R/R359X. Both patients have a common N370S mutation in the other allele. The splice site mutation results from an intronic base substitution (G to A, c.1328 + 1, g.5005) at the donor splice site of exon and intron 9. The complex allele results from two point mutations in exon 8 of glucocerebrosidase (G to C at c.1180, g.4396, and T to C at c. 1192, g.4408) substituting glycine by arginine (G355R) and arginine by a premature termination (R359X), respectively. In order to demonstrate that G355R/R359X are in cis arrangement, PCR-amplified glucocerebrosidase exon 8 genomic DNA from the patient was cloned into the vector pJET1.2 in Escherichia coli TOP10® strain. Out of the 15 clones that were sequence analyzed, 10 contained the normal allele sequence and 5 contained the complex allele G355R/R359X sequence showing both mutations in cis arrangement. Restriction fragment length polymorphism analysis using Hph1 restriction endonuclease digest was established for the IVS9 + 1G > A mutation for confirmation and efficient identification of this mutation in future patients. Past literature suggests that mutations affecting splicing patterns of the glucocerebrosidase transcript as well as mutations in Gaucher complex alleles are detrimental to enzyme activity. However, compound heterozygosity with N370S, a mild mutation, will lead to a mild phenotype. The cases reported here support these past findings.
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Key Words
- Complex alleles
- EC, enzyme commission number
- GBA novel mutations
- GBA, glucocerebrosidase enzyme protein
- GBA, glucocerebrosidase gene
- GD, Gaucher disease
- Gaucher disease
- Glucocerebrosidase
- Hb, hemoglobin
- MRI, magnetic resonance imaging
- OMIM, Online Mendelian Inheritance in Man entry number
- PCR, polymerase chain reaction
- RFLP analysis
- RFLP, restriction fragment length polymorphism
- RT-PCR, reverse transcription-PCR
- Sequence analysis
- bp, base pairs
- pJET cloning
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Affiliation(s)
- Kourtnee Hoitsema
- Department of Biology, Centre for Biomedical Research, University of Victoria, British Columbia, Canada
| | - Dominick Amato
- Mark Freedman and Judy Jacobs Program for Gaucher Disease, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Aneal Khan
- Department of Medical Genetics, University of Calgary, Alberta Children's Hospital, Calgary, Alberta, Canada; Department of Pediatrics, University of Calgary, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Sandra Sirrs
- Department of Medicine, Division of Endocrinology, University of British Columbia, Canada
| | - Francis Y M Choy
- Department of Biology, Centre for Biomedical Research, University of Victoria, British Columbia, Canada
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Agarwal S, Lahiri K, Muranjan M, Solanki N. The face of lysosomal storage disorders in India: a need for early diagnosis. Indian J Pediatr 2015; 82:525-9. [PMID: 25482214 DOI: 10.1007/s12098-014-1628-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 10/29/2014] [Indexed: 12/20/2022]
Abstract
OBJECTIVES To study the temporal pattern of lysosomal storage disorders (LSD) from onset of symptoms to the final diagnosis and to study the type and the frequency of the disease. METHODS Retrospective analysis of the case record forms of the patients attending the Genetic Clinic over a period of 12 y (January 2002- December 2013) was undertaken. Only the data of the patients who had confirmatory enzyme analysis or mutation study for LSD was further analysed. The age at onset, suspicion of the illness, first clinical presentation to a tertiary Genetic centre, and the age at the final diagnosis of these confirmed cases was noted. RESULTS A total of 5,858 patients were referred to the Genetic clinic in this period. The diagnosis of LSD was suspected in 532 patients (9.08 % of all referrals) and it could be confirmed in 119 cases (2.03 % of all referrals). Maximum patients were diagnosed with Gaucher disease (31.93 %) followed by Mucopolysaccharidoses (20.16 %). Mutation analysis was available in 21 patients (17.64 % of the diagnosed cases). The median time interval between onset and suspicion was 6 mo. The median interval between onset and presentation to the authors' Genetic clinic was 12 mo. The median interval between the onset of the disease and its confirmation was 14 mo. The median interval between presentation to the Genetic centre and diagnosis was barely 1 mo. CONCLUSIONS The incidence of LSD at authors' centre was 2.03 %, though it was suspected in 9.08 % of patients. The delay in diagnosis was hugely due to the late suspicion and thereby the late referral to a tertiary centre.
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Affiliation(s)
- Shruti Agarwal
- Department of Pediatrics, Seth GS Medical College and KEM Hospital, Acharya Donde Marg, Mumbai, 400012, Maharashtra, India,
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Metabolic liver disease in developing world with special reference to Indian children – A review. APOLLO MEDICINE 2015. [DOI: 10.1016/j.apme.2015.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Barnes S, Xu YH, Zhang W, Liou B, Setchell KDR, Bao L, Grabowski GA, Sun Y. Ubiquitous transgene expression of the glucosylceramide-synthesizing enzyme accelerates glucosylceramide accumulation and storage cells in a Gaucher disease mouse model. PLoS One 2014; 9:e116023. [PMID: 25551612 PMCID: PMC4281226 DOI: 10.1371/journal.pone.0116023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 12/02/2014] [Indexed: 11/18/2022] Open
Abstract
Gaucher disease is a lysosomal storage disease caused by defective activity of acid β-glucosidase (GCase), which leads to the accumulation of its major substrates, glucosylceramide (GlcCer) and glucosylsphingosine (GlcSph) in many cells. To modulate cellular substrate concentration in viable mouse models of Gaucher disease (Gba1 mutants), a novel mouse model was created with enhanced glycosphingolipid biosynthesis. This was accomplished by cross-breeding Gba1 mutant mice with mice expressing a transgene (GCStg) containing the mouse glucosylceramide synthase (GCS, Ugcg) cDNA driven by the ROSA promoter, yielding GCStg/Gba1 mice. The GCStg rescued Ugcg null mice from embryonic lethality. GCStg/Gba1 mice showed 2-3 fold increases in tissue GCS activity as well as accelerated GlcCer accumulation and the appearance of lipid-laden CD68 positive macrophages in visceral organs. Although GlcCer/GlcSph concentrations were elevated in the brain, there was no neurodegenerative phenotype up to 1 yr of age conceivably due to the greater residual GCase hydrolytic activity in the brains than in the visceral tissues of 9V/null mice. These studies provide 'proof of principle' for threshold substrate flux that modifies phenotypic development in Gaucher disease and other lysosomal storage diseases.
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Affiliation(s)
- Sonya Barnes
- The Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - You-Hai Xu
- The Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- The Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Wujuan Zhang
- The Division of Pathology and Laboratory Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Benjamin Liou
- The Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Kenneth D. R. Setchell
- The Division of Pathology and Laboratory Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- The Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Liming Bao
- Dartmouth-Hitchcock Medical Center, Geisel School of Medicine, Dartmouth College, Lebanon, New Hampshire, United States of America
| | - Gregory A. Grabowski
- The Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- Synageva BioPharma Corp., Lexington, Massachusetts, United States of America
| | - Ying Sun
- The Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
- The Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
- * E-mail:
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Ankala A, Tamhankar PM, Valencia CA, Rayam KK, Kumar MM, Hegde MR. Clinical Applications and Implications of Common and Founder Mutations in Indian Subpopulations. Hum Mutat 2014; 36:1-10. [DOI: 10.1002/humu.22704] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Accepted: 09/16/2014] [Indexed: 12/19/2022]
Affiliation(s)
- Arunkanth Ankala
- Department of Human Genetics; Emory University School of Medicine; Atlanta Georgia
| | - Parag M. Tamhankar
- ICMR Genetic Research Center; National Institute for Research in Reproductive Health; Mumbai Maharashtra India
| | - C. Alexander Valencia
- Division of Human Genetics; Cincinnati Children's Hospital Medical Center; Cincinnati Ohio
- Department of Pediatrics; University of Cincinnati Medical School; Cincinnati Ohio
| | - Krishna K. Rayam
- Department of Biosciences; CMR Institute of Management Studies; Bangalore Karnataka India
| | - Manisha M. Kumar
- Department of Biosciences; CMR Institute of Management Studies; Bangalore Karnataka India
| | - Madhuri R. Hegde
- Department of Human Genetics; Emory University School of Medicine; Atlanta Georgia
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Prenatal Diagnosis of Lysosomal Storage Disorders by Enzymes Study Using Chorionic Villus and Amniotic Fluid. JOURNAL OF FETAL MEDICINE 2014. [DOI: 10.1007/s40556-014-0001-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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