Clinical and genetic phenotypes of an autosomal recessive spinocerebellar ataxia-10 patient due to ANO10 gene mutations / 中华神经科杂志

Objective:To investigate the clinical phenotypes, imaging features and pathogenic variants of ANO10 gene related autosomal recessive spinocerebellar ataxia-10 (SCAR10).Methods:A cohort of 30 probands of autosomal recessive cerebellar ataxia pedigrees from China-Japan Friendship Hospital from 2018 to 2020 were collected. Friedreich ataxia and other causes of acquired ataxia were excluded, then probands were detected by whole-exome sequencing (WES), and potential pathogenic variants were confirmed by Sanger sequencing and validated in all family members. Clinical phenotypes and auxiliary examinations of the patients were analyzed in detail.Results:A pedigree of SCAR10 caused by ANO10 gene mutations was identified through WES. The 40-year-old male proband of this pedigree carried compound heterozygous mutations: c.1219-2A>C and c.1163-2A>G of the ANO10 gene, both of which were novel mutations, and Sanger sequencing revealed these two mutations were respectively inherited from his healthy parents. Bioinformatic analysis predicted these two mutations were pathogenic. The proband exhibited progressive unsteady walk, dysarthria, mild cognitive impairment. His plasma total coenzyme Q 10 was decreased (0.76 μg/ml). Brain magnetic resonance imaging showed remarkable cerebellar atrophy. Conclusions:Through WES, a SCAR10 patient caused by novel compound heterozygous mutations of ANO10 gene was identified, which is rare in China. The main clinical manifestation was progressive cerebellar ataxia and cognitive decline, and brain image showed remarkable cerebellar atrophy.

Clinical and genetic phenotypes of a patient with POLR3B gene-related hypomyelinating leukodystrophy and hypogonadism / 中华神经科杂志

Objective:To investigate the clinical phenotypes, imaging features and pathogenic variants of POLR3B gene related autosomal recessive cerebellar ataxia with hypogonadism.Methods:A female proband from a Chinese non-consanguineous family was admitted to Department of Neurology, China-Japan Friendship Hospital in March 2016, performed detailed physical and auxiliary examinations and excluded acquired causes of cerebellar ataxia. Genomic DNA was extracted from peripheral blood of the proband and conducted whole exome sequencing (WES) and verified in her asymptomatic parents. Potential pathogenic variants were validated by Sanger sequencing.Results:The proband exhibited progressive unsteady walk, cognitive impairment, dysarthria and dysphagia, dystonia, congenital cataract, hypogonadism as well as delayed puberty, amenorrhea and short stature and was effectively treated by hormone therapy. Magnetic resonance imaging of her brain showed diffused hypomyelination of white matter, relatively sparing the thalamus, globus pallidus, and optic radiations, as well as cerebellar atrophy and thin corpus callosum. X ray of her chest revealed thoraco-lumbar scoliosis. WES identified compound heterozygous mutations c.479A>C (p. E160A) and c.2657G>C (p.R886T) of POLR3B gene in this patient, and they were novel mutations, which were respectively inherited from her father and mother validated by Sanger sequencing. Bioinformatic analysis predicted these two mutations were pathogenic.Conclusion:The clinical and imaging features of POLR3B-associated leukodystrophy with hypogonadism were considerably evident, diagnosis and treatment of which should be conducted as early as possible.

Correlation between Pretreatment Serum Apolipoprotein Level and Prognosis of Small Cell Lung Cancer Patients / 中国肺癌杂志

BACKGROUND@#Lung cancer is the leading cause of cancer-related death, and small cell lung cancer (SCLC) has a poor prognosis in all types of lung cancer. This study evaluated the relationship between pretreatment serum apolipoprotein levels and prognosis in patients with SCLC, seeks a new index can guide diagnosis and treatment of SCLC.@*METHODS@#This study retrospectively analyzed the clinical data of 122 patients with SCLC. The clinical results of patients with serum apolipoprotein levels within 2 weeks before treatment were collected, including apolipoprotein AI (ApoA-I), apolipoprotein B (ApoB), and the ratio of apolipoprotein B to apolipoprotein AI (ApoB/ApoA-I). Patients' progression-free survival (PFS) and overall survival (OS) are the main outcome indicators. The best critical to determine the index's value by X-tile tool. For survival analysis, Kaplan-Meier method was used for analysis, and Cox regression analysis method was used for single factor analysis and multifactor analysis.@*RESULTS@#Compared with patients with low ApoA-I levels, patients with high ApoA-I levels (ApoA-I>1.12 g/L) had better OS (21.5 mon vs 12.3 mon, P=0.007) and PFS (7.3 mon vs 5.5 mon, P=0.017). In contrast, patients with higher ApoB/ApoA-I levels had worse median OS than patients with lower ApoB/ApoA-I levels (13.4 mon vs 20.7 mon, P=0.012). Multivariate Cox regression analysis showed that ApoA-I was an independent prognostic factor affecting PFS in SCLC patients (HR=0.67, 95%CI: 0.45-0.99, P=0.043). ApoB/ApoA-I is an independent risk factor for OS in patients with SCLC (HR=1.98, 95%CI: 1.21-3.23, P=0.007).@*CONCLUSIONS@#Serum ApoA-I level and ApoB/ApoA-I level before treatment can be important prognostic factors for SCLC, which is helpful to judge the prognosis of patients.

Clinical and genetic analysis of a patient with Krabbe disease presented as peripheral neuropathy / 中华医学遗传学杂志

OBJECTIVE@#To explore the clinical, electrophysiological and imaging features of a patient with Krabbe disease caused by GALC mutation.@*METHODS@#A comprehensive analysis including clinical investigation and genetic testing was carried out.@*RESULTS@#The patient presented with peripheral neuropathy with electrophysiological anomaly suggestive of asymmetric demyelinating neuropathy. Brain imaging revealed leukoencephalopathy. Genetic analysis has identified compound heterozygous mutations in exons 5 and 11 of the GALC gene, namely c.461C>A and c.1244G>A.@*CONCLUSION@#Krabbe disease is a group of disorders featuring substantial phenotypic heterogeneity. Genetic and enzyme testing has become indispensable for accurate diagnosis for this disease.

Clinical, myopathological and genetic mutations features of limb girdle muscular dystrophy 2I / 中华神经科杂志

Objective To summary the pathological and genetic features in nine Chinese limb girdle muscular dystrophy 2I (LGMD2I) patients.Methods Nine LGMD2I patients were recruited from Peking University First Hospital between 2011 and 2016, who came from nine unrelated and non-consanguineous families.The mean age of onset was (8.2±5.2) years (2 to 19 years), and the mean disease duration was (10.4±6.1) years (1 to 24 years).There were six males and three females, present with weakness in limb girdle muscles, four of whom accompanied with calf hypertrophy and three with scapular winging.Serum creatine kinase was 964-23 131 U/L (normal 25-190 U/L).Five of them who conducted electromyogram showed myogenic pattern.Muscle biopsy and next generation sequencing were performed in these patients, then sanger sequencing was performed to determine whether the variants co-segregated with the phenotype in these families.Results Muscle biopsy revealed myopathy features in six patients, dystrophic change in one, and only mild changes in two.Major histocompatibility complex-Ⅰ was positive in six cases, and rimmed vacuoles were found in two.There were seven mutations in fukutin-related protein (FKRP) gene.A reported mutation of c.545A>G (p.Y182C) appeared in eight cases, including three homozygotes and five compound heterozygotes.The mutation of c.1067T>C (p.Ile356Thr) was reported too.And c.1263C>A (p.Tyr421X), c.534G>T(p.Thr178Cys), c.1027G>C (p.Glu343Gln), c.1027G>T(p.Glu343X), c.1448A>G (p.Tyr483Cys) were found to be novel mutations.Conclusions LGMD2I showed large variation in myopathology.The missense mutation A545G(Y182C) is a hot spot of FKRP gene in our series.