In 409 students were tested with Ishihasa chromatic plates for distinguishing subjects with color vision deficiencies (CVD) at Hai Phong Medical College from 2000 to 2002. 57.7% male and 42.3% female. Frequency of CVD: 8.05 ± 0.25% male, female 0%. All people with CVD, among them deuteranopia was 68.42%, frequency: 5.51 ± 0.19. All people with CVD, among them red - green were 21.05%, frequency: 1.70 ± 0.11%. All people with CVD, among them red and total color was 5.26%, frequency of red: 0.37 ± 0.05%, frequency of total color: 0.37 ± 0.05%
Vision ; Chromosomes, Human, X ; Students, Medical

OBJECTIVE: To carry out prenatal diagnosis and genetic analysis for a fetus with disorders of sex development (DSDs). METHODS: A fetus with DSDs who was identified at the Shenzhen People's Hospital in September 2021 was selected as the study subject. Combined molecular genetic techniques including quantitative fluorescence PCR (QF-PCR), multiplex ligation-dependent probe amplification (MLPA), chromosomal microarray analysis (CMA), quantitative real-time PCR (qPCR), as well as cytogenetic techniques such as karyotyping analysis and fluorescence in situ hybridization (FISH) were applied. Ultrasonography was used to observe the phenotype of sex development. RESULTS: Molecular genetic testing suggested that the fetus had mosaicism of Yq11.222qter deletion and X monosomy. Combined with the result of cytogenetic testing, its karyotype was determined as mos 45,X[34]/46,X,del(Y)(q11.222)[61]/47,X,del(Y)(q11.222),del(Y)(q11.222)[5]. Ultrasound examination suggested hypospadia, which was confirmed after elective abortion. Combined the results of genetic testing and phenotypic analysis, the fetus was ultimately diagnosed with DSDs. CONCLUSION This study has applied a variety of genetic techniques and ultrasonography to diagnose a fetus with DSDs with a complex karyotype.
Prenatal Diagnosis ; Mosaicism ; Chromosomes, Human, X ; Chromosomes, Human, Y ; Humans ; Male

OBJECTIVETo perform genetic analysis of a complex chromosome rearrangement (CCR) 46,XY, t(3;11)(q27; q13), ins(11;3)(q13;p26p13) in an azoospermic man.

METHODSPeripheral blood lymphocytes we re obtained for karyotyping, and metaphases were studied by multicolor fluorescence in situ hybridization procedure, Y chromosomal microdeletions in the azoospermia factor (AZF) region were analyzed with multiplex polymerase chain reaction.

RESULTSThe case was a complex chromosomal translocation between chromosomes 3 and 11 with four breakpoints, and accompanied with a band of chromosome 3 inserting into chromosome 11. No Y-chromosome microdeletions were identified at 6 STS sequences of the AZF loci.

CONCLUSIONCCR can have a significant impact on male fertility. Molecular cytogenetic techniques may contribute to improving and personalizing reproductive counseling.

Adult ; Azoospermia ; genetics ; Chromosome Breakage ; Chromosome Deletion ; Chromosomes, Human, Pair 1 ; Chromosomes, Human, Pair 14 ; Chromosomes, Human, Pair 3 ; Chromosomes, Human, X ; Chromosomes, Human, Y ; DNA ; analysis ; Humans ; Karyotyping ; Male ; Translocation, Genetic

OBJECTIVETo evaluate the feasibility of using fluorescence in situ hybridization(FISH) for the detection of a few common chromosome aneuploidies on interphase nuclei of uncultured amniotic fluid cells.

METHODSAmniotic fluid samples were taken from 55 women at 16-32 weeks of pregnancy; interphase FISH was performed for diagnosing Down syndrome and aneuploidies of other four chromosomes 13, 18, X and Y. Then the karyotypes from standard cytogenetic analysis after percutaneous umbilical blood sampling(PUBS) were compared to the FISH results.

RESULTSEach of the 55 uncultured amniotic fluid samples tested with FISH was enumerated 200 nuclei. Fifty-three samples were normal. Two samples were found to have trisomy 21(one is a case of standard trisomy 21 with three signals in all 200 nuclei, the other is a mosaic trisomy 21).

CONCLUSIONInterphase FISH analysis of uncultured amniotic fluid cells is a rapid, accurate and very sensitive method. It could be used in the prenatal cytogenetic laboratory.

Adult ; Amniocentesis ; Amniotic Fluid ; cytology ; Aneuploidy ; Chromosomes, Human, Pair 13 ; Chromosomes, Human, Pair 18 ; Chromosomes, Human, Pair 21 ; Chromosomes, Human, X ; Chromosomes, Human, Y ; Down Syndrome ; diagnosis ; genetics ; Female ; Humans ; In Situ Hybridization, Fluorescence ; Pregnancy ; Prenatal Diagnosis ; methods ; Trisomy

Recently, thanks to the development of the molecular genetics which had made us understand the nature of some genetic disorders, the concept of the classification has changed. Charcoal-Marie-Tooth disease (CMT) is the most conspicuous disease. The disease is inherited as an autosomal dominant trait. CMT is classified into two major forms: demyelinating CMT type 1 and axonal CMT type 2. CMT type 1 loci are known to map to chromosome 17 (CMT IA), chromosome 1 (CMT IB), X chromosome (CMT IX), and unknown autosome (CMT IC). And CMT type 2 loci are divided into chromosome 1 (CMT 2A) and chromosome 3 (CMT 2B). The most prevalent form is CMT IA caused by a duplication in a region of chromosome 17p11.2-12. Peripheral myelin protein-22 (PMP-22) gene In that region is known to being responsible for the disease. In Korea, although several families of CMT were reported, there is no report on the subtype of CMT type 1 confirmed by genetic analysis. We report a family of CMT IA confirmed by molecular genetic analysis using D17s122 markers.
Axons ; Chromosomes, Human, Pair 1 ; Chromosomes, Human, Pair 17 ; Chromosomes, Human, Pair 3 ; Classification ; Humans ; Korea ; Molecular Biology* ; Myelin Sheath ; X Chromosome

Recently, thanks to the development of the molecular genetics which had made us understand the nature of some genetic disorders, the concept of the classification has changed. Charcoal-Marie-Tooth disease (CMT) is the most conspicuous disease. The disease is inherited as an autosomal dominant trait. CMT is classified into two major forms: demyelinating CMT type 1 and axonal CMT type 2. CMT type 1 loci are known to map to chromosome 17 (CMT IA), chromosome 1 (CMT IB), X chromosome (CMT IX), and unknown autosome (CMT IC). And CMT type 2 loci are divided into chromosome 1 (CMT 2A) and chromosome 3 (CMT 2B). The most prevalent form is CMT IA caused by a duplication in a region of chromosome 17p11.2-12. Peripheral myelin protein-22 (PMP-22) gene In that region is known to being responsible for the disease. In Korea, although several families of CMT were reported, there is no report on the subtype of CMT type 1 confirmed by genetic analysis. We report a family of CMT IA confirmed by molecular genetic analysis using D17s122 markers.
Axons ; Chromosomes, Human, Pair 1 ; Chromosomes, Human, Pair 17 ; Chromosomes, Human, Pair 3 ; Classification ; Humans ; Korea ; Molecular Biology* ; Myelin Sheath ; X Chromosome

BACKGROUNDChromosomal aberrations are the major cause of pre- and post-implantation embryo wastage and some studies suggest that half of all human conceptions have a chromosomal abnormality. A chromosomal aberration in human sperms is also one of the causes of failure of in vitro fertilization. This study was designed to ascertain whether chromosomal aneuploidy in spermatozoa is a risk factor for male infertility.

METHODSTwelve infertile men were divided into two groups: 10 with oligoasthenoteratozoospermia (OAT, Group A) and two with a normal semen analysis (Group B). Two normal healthy sperm donors acted as controls (Group C). We used fluorescence in situ hybridization (FISH) and probes for chromosomes X, Y and 18 to determine the frequency of aneuploidy.

RESULTSThe frequencies of spermatozoa disomy for chromosomes X, Y and 18 were 0.30% and 0.30%, respectively, in Group B. The percentages were not significantly different from those of Group C (0.15% and 0.16%). The frequencies of nullisomy for chromosomes X, Y and 18 were 0.15% and 0 for Group B, and 0 and 0.15% for Group C (P > 0.05). In Group A, the incidences of disomy were 1.13% and 0.96% and the frequencies of nullisomy were 1.13% and 1.60%. In these three groups, the incidences of diploidy were 0.60%, 1.00%, and 0.30%, respectively. Both the frequencies of disomic and nullisomic spermatozoa for chromosomes X, Y, and 18 and of diploid spermatozoa were significantly higher in Group A than in Groups B and C. The estimated total aneuploidy rates in the sperm from the three groups were 42.44%, 6.05%, and 2.59%, respectively.

CONCLUSIONThese results indicate that chromosomal aneuploidy in spermatozoa may be a risk factor for infertility.

Adult ; Aneuploidy ; Chromosomes, Human, Pair 18 ; Chromosomes, Human, X ; Chromosomes, Human, Y ; Humans ; In Situ Hybridization, Fluorescence ; Infertility, Male ; etiology ; genetics ; Male ; Risk Factors

OBJECTIVETo analyze the numerical aberration of chromosome X, Y and 18 in the spermatozoa of asthenospermia patients by triple-color fluorescence in situ hybridization.

METHODSThe experiment included 10 asthenospermia patients and 5 healthy men with normal semen quality as controls. Fluorescence in situ hybridization (FISH) and probes for chromosomes including X, Y and 18 were used to determine the frequency of the aneuploid of the chromosomes in spermatozoa.

RESULTSOf the 45,547 spermatozoa counted from the semen samples, the hybridization rate was 99.18%. The frequencies of the chromosome disomies including XX18, XY18, YY18, X1818 and Y1818 were (0.124 +/- -0.086)%, (0.360 +/- 0.380)%, (0.109 +/- 0.195)%, (0.342 +/- 0.746)% and (0.299 +/- 0.564)% in the case group and (0.014 +/- 0.019)%, (0.090 +/- 0.080)%, (0.030 +/- 0.031)%, (0.068 +/- 0.103)% and (0.075 +/- 0.083)% in the control. The sperm aneuploid rate was 9.25% in the former and 2.70% in the latter, with significant difference in between (P< 0.01).

CONCLUSIONAsthenospermia patients have a higher aneuploid rate of sperm chromosome than normal fertile men. However, larger samples are yet to be studied to obtain more scientific evidence.

Aneuploidy ; Asthenozoospermia ; genetics ; Chromosome Painting ; methods ; Chromosomes, Human, Pair 18 ; Chromosomes, Human, X ; Chromosomes, Human, Y ; Humans ; Male ; Sex Chromosome Aberrations ; Spermatozoa ; metabolism

A chromosomal abnormality was found in about 3.6-7.6% of males presenting with azoospermia or oligospermia. Translocations between X chromosome and autosomes are rarely seen genetic disorders that cause male infertility. We described here a 26-year-old infertile male with t(X;14)(p11.4; p12). He showed a normal phenotype without any familial history of congenital abnormalities. The cytogenetic analysis of the proband revealed an X-autosomal translocation, 46,Y,t(X;14)(p11.4;p12), which was inherited from his mother. The testis biopsies indicated the arrest of spermatogenesis. There were no microdeletions of the azoospermia factor a (AZFa), AZFb and AZFc regions in the Y chromosome shown by PCR with 11 sequence-tagged site (STS) markers. According to the literature, male carriers of an X-autosome translocation are invariably sterile, regardless of the position of the break-point in the X chromosome. To our knowledge, this is the first case report of azoospermia with t(X;14)(p11.4;p12) in Korea.
Adult ; *Chromosomes, Human, Pair 14 ; *Chromosomes, Human, X ; Humans ; Infertility, Male/diagnosis/*genetics ; Karyotyping ; Male ; Spermatogenesis ; *Translocation, Genetic

OBJECTIVE: To explore the etiology of a patient with Kallmann syndrome (congenital hypogonadism and anosmia) and a 45,X/46,XY karyotype. METHODS: Peripheral venous blood samples were collected from the proband and his parents and subjected to whole exome sequencing. Candidate variants were verified by Sanger sequencing. RESULTS: The proband was found to harbor compound heterozygous variants of the PROKR2 gene, namely c.533G>C (p.W178S) and c.308C>T (p.A103V), which were inherited from his father and mother, respectively. The two variants were respectively predicted to be likely pathogenic and variant of unknown significance, respectively. CONCLUSION The reduced chromosomal mosaicism might have caused no particular clinical manifestations in this patient. For patients with features of Kallmann syndrome, genetic testing is conducive to early diagnosis and can provide a basis for genetic counseling and clinical treatment.
Humans ; Genetic Testing ; Hypogonadism/genetics* ; Kallmann Syndrome/genetics* ; Karyotype ; Mutation ; Exome Sequencing ; Chromosomes, Human, X/genetics* ; Chromosomes, Human, Y/genetics*