Children with developmental coordination disorder (DCD) commonly experience difficulties with handwriting.However, there is currently no standardized tool for assessing dysgraphia in this population.Therefore, this paper provides a review of the commonly used handwriting assessment tools both domestically and internationally, as well as their application in individuals with DCD.The aim is to offer a reference to clinical professionals involved in the diagnosis and treatment of DCD in selecting appropriate tools for assessing handwriting difficulties in children.

Children with developmental coordination disorder (DCD) commonly experience difficulties with handwriting.However, there is currently no standardized tool for assessing dysgraphia in this population.Therefore, this paper provides a review of the commonly used handwriting assessment tools both domestically and internationally, as well as their application in individuals with DCD.The aim is to offer a reference to clinical professionals involved in the diagnosis and treatment of DCD in selecting appropriate tools for assessing handwriting difficulties in children.

β-Thalassemia is a single-gene disease caused by mutations in β-globin and has a distinct geographical characteristics. Current treatment for patients with moderate to severe thalassemia has mainly relied on long-term blood transfusion and/or hematopoietic stem cell transplantation. B cell lymphoma/leukemia 11A (BCL11A) as a transcriptional repressor plays a vital role in monitoring γ/β hemoglobin switching, maintaining the normal function of hematopoietic stem cells, and regulating erythrocyte differentiation and lymphocyte development. With the rapid progress in gene editing technology, the BCL11A as a therapeutic target for β-thalassemia has shown promising results. This article has systematically summarized the regulatory mechanism and therapeutic potential of the BCL11A, with an aim to provide new ideas for the treatment of β-thalassemia.

The perivascular space is formed by the pia mater around the blood vessels and participates in the fluid exchange and waste clearance in the brain. The enlarged perivascular space (EPVS) indicates the disorder of brain clearance mechanism, which is closely related to the occurrence and development of a variety of clinical diseases. In recent years, there are a lot of studies on the pathogenesis and influencing factors of EPVS. This article reviews its anatomy, neuroimaging, pathogenesis, and risk factors.

OBJECTIVE: To investigate the clinical features of fetuses with Wolf-Hirschhorn syndrome(WHS) and explore the diagnostic methods and prenatal ultrasound characteristics and provide evidence for prenatal genetic counseling. METHODS: We retrospectively analyzed 5 cases of WHS fetuses diagnosed from March 2016 to February 2020, and analyzed the results of chromosomal karyotype analysis and chromosomal microarray analysis (CMA) of the fetuses. RESULTS: Five cases of WHS were detected by CMA, four cases were detected by karyotype analysis. Prenatal ultrasound revealed 4 abnormalities, of which 3 had intrauterine growth restriction, and only 1 had abnormalities of the maxillofacial region. The sequence of the fragments was 4p16.3p16.1 with a loss of 6.5 Mb, 4p16.3p15.32 with a loss of 15.6 Mb combined with 2p25.3 increased by 906kb, 4p16.3p15.31 with a loss of 20.4 Mb, 4p16.p15.1 with a loss of 35 Mb and 4p16.3p14 with a loss of 37 Mb. CONCLUSION Fetal growth restriction may be one of the early manifestations of WHS. Absence of fetal facial abnormality by prenatal ultrasound screening cannot exclude WHS. Karyotype analysis may miss the diagnosis of WHS, while combined CMA techniques can improve the diagnostic accuracy.
Chromosomes, Human, Pair 4/genetics* ; Female ; Fetal Growth Retardation/genetics* ; Humans ; Karyotyping ; Pregnancy ; Prenatal Diagnosis ; Retrospective Studies ; Wolf-Hirschhorn Syndrome/genetics*

OBJECTIVE: To explore the hematological phenotype and genotype of hemoglobin Q-Thailand in Fujian area. METHODS: Genomic DNA was extracted from peripheral venous blood samples of patients. Suspected samples were screened by hematological parameters analysis and verified with DNA sequencing. RESULTS: In 35 patients suspected with Hb Q-Thailand, 20 were confirmed, which included one case compounded with heterozygous β mutation and one compounded with Hb New York. CONCLUSION Analysis of hematological phenotype and genotype of Hb Q-Thailand can faciliate genetic counseling for patients from Fujian area.
China ; Genotype ; Hemoglobins, Abnormal ; genetics ; Heterozygote ; Humans ; Mutation ; Phenotype

OBJECTIVE: To determine the frequency of Hong Kong αα (HK αα) gene in α3.7 positive samples among carriers from Fujian area. METHODS: Routine genetic testing for thalassemia was carried out for 10145 patients with positive screening results. Single PCR and two-round nested PCR were utilized to detect HK αα among 507 patients with α3.7/αα and 2 patients for whom electrophoresis showed α3.7, -αSEA and normal α2 alleles. Reverse dot blot test was used for detecting non-deletional α-thalassemia and β-thalassemia variants. RESULTS: Among the 507 patients with α3.7/αα, HK αα was identified in 35 cases, which included 25 HK αα/αα, 5 HK αα/α3.7, 4 HK αα/αα with heterozygous CD41/42 (HBB: c.126_129delCTTT) variant, 1 HK αα/αα with IVS-II-654 (HBB: c.316_197C>T) heterozygous variant. One patient was confirmed to have α3.7/anti4.2 genotype. The two cases with α3.7, -αSEA and normal α2 alleles were confirmed to be HK αα/--SEA. The frequency of HK αα genotype in Fujian area was therefore 7.27% among patients with α3.7 and 0.36% in the general population. CONCLUSION A certain proportion of HK αα has been detected in Fujian area, which will enable more accurate diagnosis and genetic counseling.
Genotype ; Heterozygote ; Hong Kong ; Humans ; alpha-Thalassemia ; beta-Thalassemia

Neuromuscular disease (NMD) is a group of hereditary or acquired myopathy typically manifested as motor dysfunction. There is still no consensus in the standardized tools for evaluation of motor function. Among the tools widely used, Motor Function Measure can be used in all kinds of NMD, while North Star Ambulatory Assessment and Performance of the Upper Limb can be for Duchenne muscular dystrophy, and Hammersmith Functional Motor Scale, the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders and Upper Limb Module for spinal muscular atrophy.

Objective To analyze the molecular characterization and prevalence of beta-thalassemia in Fujian Province .Methods RDBwas applied to identify 17 point mutations of beta gene and 3 point mutations of alpha gene .Gap-PCRwas applied to identify 3 deletions of alpha gene , MLPA and DNA sequecing were applied to identify the rare mutational genotype of beta-thalassemia.Results 3515 cases (15.45％)ofβ-thalassemia were confirmed.15 genotypes were found in the studied subjects .βIVS-2-654(C→T)/βN, βCD41-42(-TCTT)/βN, βCD17(A→T)/βN, β-28(A→G)/βN, βCD27-28( +C)/βN, and βCD26(G→A)/βN were the mostcommon genotypes in Fujian Province , accounting for 41.76％, 30.50％, 12.46％, 5.46％, 2.93％and 1.82％respectively , It was found that the total frequency of them was 94.93％in our study.13 cases of deletional β-thalassemia were detected , including 6 cases of Southeast Asia subtype ( SEA-HPFH) , 6 cases of Chinese subtype Gγ(Aγδβ)0 and 1 case of 1.35kb deletion(NG-000007.3:g.69997-71353 del 1357) in one subject .13 cases of rareβ-thalassemia were detected , including Hb J-Bankok in 8 subjects and Hb New York in 5 subjects were diagnosed .Conclusions As a high-risk area forβ-thalassaemia, the detection of deletional β-thalassemia and rare β-thalassaemia subtypes should be screened in addition to the common β-thalassemia genes , so as to demonstrate the results of β-thalassemia gene detection in this region .Those screening results are useful for genetic counseling and can effectively reduce the birth of children with moderate to severe β-thalassaemia .

Objective To analyze genetic testing and prenatal diagnosis of two pedigrees with X-linked ichthyosis.Methods Karyotyping,bacterial artificial chromosomes-on-BeadsTM (BoBs),fluorescence in situ hybridization (FISH) and single nucleotide polymorphism array (SNP-array) were used to detect amniotic fluid and peripheral blood specimens of two pedigrees,one with and one without known family history of ichthyosis.Clinical data was collected and analyzed as well.Results (1) The pedigree without known family history:Prenatal BoBs showed that the XC1 probe of fetus Ⅳ-12 was from 0.36 to 0.50,suggesting the presence of microdeletion.SNP-array analysis of gravida Ⅲ-13 showed a 1.68 Mb copy number deletion at Xp22.31 and four missing Online Mendelian Inheritance in Man (OMIM) genes (HDHD1,STS,VCX and PNPLA4).Fetal SNP-array revealed a deletion of arr[hg19] Xp22.31 (6 455 151-8 135 644)× 0,indicating a maternally inherited one.FISH analysis verified the deletion in STS gene in fetus Ⅳ-12,whose karyotype was 46,XY.The gravida's female cousin (Ⅲ-21) and nephew (Ⅳ-14) also had STS gene deletion,which size was the same as that from the gravida and the fetus.Fetus (Ⅳ-12) was delivered at term by cesarean section with normal skin,but an extensive white scales appeared on the abdomen one week after birth and the symptom was aggravated when the weather was dry.The infant was followed up to eight months old and no other clinical symptoms were found.(2) The pedigree with known family history:SNP-array revealed that a 1.2 Mb copy number deletion at Xp22.31 and four missing OMIM genes (HDHD1,STS,VCX and PNPLA4) were detected in pregnant women (Ⅲ-21),proband (Ⅳ-16) and fetus (Ⅳ-17).FISH analysis of the fetus verified the deletion in STS gene.The karyotype of the fetus was 46,XY.Fetus Ⅳ-17 was delivered at term by cesarean section with normal skin,but white scales widely appeared on the abdomen ten days after birth.The infant was followed up to four months old and no other clinical symptoms were found.Conclusion Molecular genetic techniques such as BoBs,FISH and SNP array are used in combination in this study to provide genetic testing and prenatal diagnosis to two XLI pedigrees,which is helpful for clinical diagnosis and genetic counseling.