OBJECTIVE: To explore the genetic basis for a Chinese pedigree affected with amyloidosis cutis dyschromica. METHODS: High-throughput sequencing was carried out for the proband. Bioinformatic analysis was used to identify the pathogenic variants. The result was verified by Sanger sequencing. RESULTS: A homozygous nonsense variant c.565C>T (p.Arg189X) of the GPNMB gene was identified in the proband, his elder brother and younger sister, which resulted a truncated protein with loss of function. The father of the proband was a heterozygous carrier for the variant. The genotype of his mother was unknown since she had passed away. Based on the American College of Medical Genetics and Genomics standards and guidelines, the c.565C>T variant was predicted to be likely pathogenic (PS3+ PM2+ PP1+PP3). CONCLUSION The novel homozygous GPNMB variant probably underlay the amyloidosis cutis dyschromica in this pedigree. Above finding has expanded the spectrum of GPNMB gene variants.
Amyloidosis, Familial/genetics* ; China ; Female ; Homozygote ; Humans ; Male ; Membrane Glycoproteins/genetics* ; Mutation ; Pedigree

OBJECTIVE: To explore the genetic basis for a patient with primary ciliary dyskinesia (PCD). METHODS: High-throughput sequencing and bioinformatic analysis were carried out to identify pathogenic variant in the patient. Suspected variant was verified by Sanger sequencing among the family members, and intracytoplasmic sperm injection (ICSI) was used to achieve the pregnancy. RESULTS: The patient had obstructive azoospermia, measurement of nasal NO exhalation at 84 ppb, and typical symptoms of PCD in nasal sinuses and lungs. DNA sequencing showed that he had carried biallelic variants of the DNAH5 gene, namely c.1489C>T (p.Q497X) in exon 11 and c.6304C>T (p.R2102C) in exon 38. His wife achieved clinical pregnancy with the assistance of ICSI. CONCLUSION Above finding has enriched the spectrum of DNAH5 gene variants, though the latters did not affect the outcome of pregnancy by ICSI.
Axonemal Dyneins/genetics* ; Exons ; High-Throughput Nucleotide Sequencing ; Humans ; Kartagener Syndrome/genetics* ; Male ; Sequence Analysis, DNA ; Sperm Injections, Intracytoplasmic

OBJECTIVETo study the effect of Percoll selection technique on normal morphology and acrosin activity of human spermatoza.

METHODSThe sperm morphology and sperm acrosin activity were analyzed by automated sperm morphology analyzer(ASMA) and spectrocolorimetry.

RESULTSThe normal morphology sperm rate and acrosin activity were significantly increased after Percoll selection technique (P < 0.001).

CONCLUSIONPercoll selection technique could affect normal morphology sperm ratio and acrosin activity.

Acrosin ; metabolism ; Adult ; Centrifugation, Density Gradient ; Fertilization in Vitro ; Humans ; Male ; Spermatozoa ; cytology ; enzymology

OBJECTIVE: To determine the nature and origin of aberrant chromosomes in a child with multiple anomalies and psychomotor retardation. METHODS: Routine G-banding was carried out to analyze the karyotypes of the patient and his parents, and next generation sequencing for copy number variations (CNV-seq) was used for the fine mapping of the aberrant chromosomal regions. RESULTS: The proband and his uncle exhibited psychomotor retardation, craniofacial malformation, infantile external genitalia, and concealed penis. Cytogenetic analysis indicated that the child has a 46,XYqh+,+(9),t(9;13)(q13;q12),pat,-13 karyotype. His uncle was XYqh+,+(9),t(9;13)(q13;q12)mat,-13, his father was 46,XYqh+,t(9;13)(q13;q12)mat, his grandmother was 46,XX,t(9;13)(q13;q12), and his grandfather was 46,XYqh+. The result of CNV-seq assay for the child was 46,XY,+9p(pter-p13.2,-40 Mb×3). No deletion was detected. CONCLUSION The partial trisomy 9 and partial monosomy 13 probably underlie the phenotypic abnormalities in the child. Combined chromosomal karyotyping and DNA sequencing can facilitate delineation of the nature and origin of the aberrant chromosomes.
Abnormalities, Multiple ; Child ; Chromosome Deletion ; Chromosomes, Human, Pair 13 ; Chromosomes, Human, Pair 9 ; DNA Copy Number Variations ; Humans ; Karyotyping ; Male ; Monosomy ; Pedigree ; Translocation, Genetic ; Trisomy