Intracellular stimulating and recording method was used by two glass microelectrodes on crayfish small axon. Physiologic and physical parameters of small nerve fiber were measured. 4—aminopyridine (4-AP). a selective inhibitor of the potassium channel,made"b" (an irritability index,a constant in Weiss's formula) decreased(p

BACKGROUND:Tol-like receptor (TLR) and its signaling pathway play an important role in autoimmune diseases, hypersensitivity, inflammation, apoptosis and transplant rejection; however, its effects on immune pathogenesis of Henoeh-Schonlein purpura in children have not been fuly elucidated. OBJECTIVE:To investigate the TLR2 expression in peripheral blood mononuclear cels in children with Henoeh-Schonlein purpura and its correlation with immune response. METHODS: Sixty-four children with Henoeh-Schonlein purpura were divided into two groups: non-renal damage group (n=36) and renal damage group (n=28). Meanwhile, another 30 healthy children subjected to health examination acted as control group. Flow cytometry and florescent quantitative PCR were employed to detect TLR2 protein and mRNA expression in peripheral blood mononuclear cels, respectively. ELISA was used to detect plasma interferon-γ and interleukin-4 levels and transforming growth factor β and interleukin-10 levels secreted from Treg cels. RESULTS AND CONCLUSION:Levels of interferon-γ and interferon-γ/interleukin-4 in the children with Henoeh-Schonlein purpura were significantly lower than those in the control group (P < 0.05), while the level of interleukin-4 was higher than the control group (P < 0.05). The expression of TLR2 protein and mRNA was significantly higher in the Henoeh-Schonlein purpura children than the healthy children (P < 0.05) and significantly higher in the renal damage group than the non-renal damage group (P < 0.05). Compared with the control group, the levels of interleukin-10 and transforming growth factor β were significantly higher in the children with Henoeh- Schonlein purpura (P < 0.05). These findings indicate that Henoeh-Schonlein purpura children have increased levels of TLR2 protein and mRNA in the peripheral blood mononuclear cels, and exhibit immune imbalance. TLR2 is involved in the pathogenesis of Henoeh-Schonlein purpura, and transforming growth factor β can be used to evaluate Treg immune response and provide reference for diagnosis, treatment of prognosis of Henoeh-Schonlein purpura children.

Based on previous clinical and basic research on autohemotherapy,its effective mechanism was explored.Autohemotherapy was used as the keyword in the document retrieval of databases such as the Pubmed,CNKI,Wanfang,VIP,and etc.from 1990 to 2017.Previous clinical and basic research results of our team were also combined in the analysis of effective mechanism study on autohemotherapy in the treatment of acne.The results showed that autohemotherapy displayed the treatment effect of acne vulgaris through the regulation of Th1/Th2 immune deviation and micro ecological imbalance of local lesions,which may be one of the important ways in the treatment of acne vulgaris by autohemotherapy.It also reflected the regulation of Yin and Yang to reach the balance.It was concluded that in the future research,taking the effect of Th1/Th2 immune deviation and micro ecological imbalance of local lesions as the starting point,it will provide experimental basis for the effect of regulating Yin and Yang to reach the balance.It can provide certain scientific basis for its clinical application.

Objective:To report a rare case of early onset epileptic encephalopathy caused by YWHAG gene mutation, and discuss the clinical and genetic characteristics as well as the diagnosis, treatment and prognosis of the disease.Methods:Clinical data of the patient with YWHAG gene deficiency from Department of Neurology, Children′s Hospital Affiliated to Zhengzhou University were collected in January 2018. The whole exome sequencing was performed on the core members of the family, and the characteristics of gene mutations were analyzed.Results:The proband is a girl, three years and 10 months old, presented to the outpatient department of neurology with a history of six-month intermittent convulsions, manifested as epilepsy seizures, mental retardation, motor delay and gait instability, ataxia. The brain magnetic resonance imaging showed myelinated dysplasia, and long-term video electroencephalogram (EEG) showed extensive 1.5-3.0 Hz slow spikes, and multiple spikes during sleep. During the monitoring, the children had clinical seizures and abnormal EEG discharges, indicating that myoclonus was accompanied by atypical absence of consciousness. Whole exome sequencing on the proband detected a de novo mutation c.169C>T (p.Arg57Cys) in YWHAG gene. According to American College of Medical Genetics guidelines (2015), the mutation was considered potentially pathogenic.Conclusion:Early epileptic encephalopathy caused by YWHAG gene mutation is very rare, and the variation of YWHAG gene c.169C>T is the possible pathogenic variation of the genetic cause of early onset epileptic encephalopathy in the proband.

Objective:To analyze the clinical and imaging characteristics of acute necrotic encephalopathy (ANE) in a child with human herpesvirus-6 (HHV-6) infection.Methods:Retrospective analysis was performed on the clinical data and imaging features of a case of HHV-6 related ANE from Children′s Hospital Affiliated to Zhengzhou University in March 2019.Results:The one year and seven month-old child had acute encephalopathy, recurrent convulsions, consciousness disorders, elevated serum transaminase. The number of cerebrospinal fluid (CSF) cells was normal and the protein increased. High throughput gene testing of CSF showed HHV-6. Cranial magnetic resonance imaging showed multiple symmetry damage in the bilateral thalamus, brainstem, and cerebellum. The symptoms improved after the treatment of glucocorticoids, intravenous immunoglobulin, and plasmapheresis.Conclusions:ANE is a rare severe encephalopathy, the characteristic imaging change of which is symmetry multifocal cerebral damage, especially in the bilateral thalamus. ANE should be considered for patients with frequent convulsions and disturbance of consciousness after virus infection.

Objective:To investigate the clinical phenotypes, therapy and genetic features of aldehyde dehydrogenase 7 family member A1 (ALDH7A1) gene mutations in five cases of pyridoxine dependent epilepsy (PDE) with diagnosis confirmed by next generation sequencing.Methods:Retrospective analysis was carried out on clinical data of five cases of PDE children with early epilepsy onset who were treated in the Department of Neurology of Children′s Hospital Affiliated to Zhengzhou University from February 2018 to November 2019. Next generation sequencing approach was used for genetic sequencing of proband ALDH7A1 gene and the first generation Sanger was used for validation of family members. And the characteristics of gene mutations were analyzed.Results:Among the five children diagnosed with PDE, the male to female ratio was 4 ∶ 1 and ages at clinic visit ranged from two months to 10 months old. In clinical phenotypes, all five cases experienced onset in neonatal period, with repeated seizures, manifested as myoclonus, spasms or focal paroxysm. The administration of antiepileptic drugs performed poorly in seizure control while long term oral intake of large dose pyridoxine showed better efficacy. All the five cases of children came from compound heterozygous mutations of father and mother, i.e. slicing homozygous mutation c.247-2(IVS2)A>T, missense mutation c.584A>G (p.N195S) and nonsense mutation c.1003C>T(p.R335 *), missense mutation c.1553G>C(p.R518T) and c.1547A>G(p.Y516C), missense mutation c.1547A>G(p.Y516C) and frameshift mutation c.1566_1568delTAC, missense mutation c.1061A>G(p.Y354C) and nonsense mutation c.841C>T(p.Q281X, 259), among which c.247-2(IVS2)A>T was novel splicing site mutation not reported before. Conclusions:PDE is induced by ALDH7A gene mutation. Early clinical manifestations are mostly onset of refractory epilepsy in neonatal period. Antiepileptic drugs perform poorly in terms of efficacy while pyridoxine can control seizure effectively. Gene analysis should be conducted on such patients for confirmed diagnosis.

Objective:To investigate the clinical characteristics and gene mutation of seven cases of CDKL5 gene related early-onset epileptic encephalopathy diagnosed by next-generation sequencing.Methods:The clinical data of children with early-onset epileptic encephalopathy from February 2018 to December 2019 in the Department of Neurology, Children′s Hospital Affiliated to Zhengzhou University were retrospectively analyzed. The whole exome sequencing method was used to analyze the entire exome of the proband, and seven cases of CDKL5 gene mutation positive were screened out, and Sanger sequencing verification on family members was performed to identify the source and the characteristics of gene mutations were analyzed.Results:Among the seven children diagnosed with CDKL5 gene related early-onset epileptic encephalopathy, the ratio of male to female was 2∶5, and the age of onset was 15 days to five months of birth. The clinical phenotypes all included different degrees of developmental delay and repeated seizures, which were manifested as general seizures, myoclonic seizures, convulsive seizures or focal seizures; the outcome of use of antiepileptic drugs to control seizures was poor, and some applications of ketogenic diet had better effects. CDKL5 gene mutation sites were all denovo mutations, including NM_003159: c.772_776del (p.K258Efs *10) frameshift mutation, NM_003159.2 (exon: 9-15) heterozygous deletion, CDKL5 hemizygous deletion, NM_003159: c.268 (exon5) G>T (p.E90 *, 941) and NM_003159: c.2578C>T (p.Q860 *, 171) nonsense mutation, NM_003159: c.211A>G (p.Asn71Asp) and NM_001323289: c.545T>C (p.L182P) missense mutation. Among them, c.772_776del (p.K258Efs *10), c.268 (exon5)G>T and c.2578C>T (p.Q860 *, 171) have not been reported. Conclusions:CDKL5 gene related early-onset epileptic encephalopathy is an early onset epilepsy, which is more common in women, and has different forms of seizures. The early electroencephalogram is characterized as severe abnormal brain discharge, and the disease progresses in various forms. There are no specific changes in head magnetic resonance imaging. Different gene mutation sites may lead to different phenotypes and prognostic differences. Many anti-epileptic treatments are ineffective, and ketogenic diets are effective for some patients.

OBJECTIVE: To investigate the clinical phenotype and genetic characteristics of a patient with hypohidrotic ectodermal dysplasia (HED) due to partial deletion of EDA gene. METHODS: The child has presented with HED complicated with epilepsy. Family trio whole exome sequencing (Trio-WES), copy number variation sequencing (CNV-seq), and karyotype analysis were carried out to explore the underlying genetic etiology. RESULTS: The proband, a 7-year-and-8-month-old boy, presented with thin curly hair, thin and sparse eyebrow, xerosis cutis, susceptibility to hyperthermia from childhood, hypohidrosis, sharp/sparse/absent teeth, saddle nose, prominent forehead, auricle adulation and seizure. He was found to have a normal chromosomal karyotype, and no abnormality was found by Trio-WES. Genome-wide CNV-seq revealed a 341.90 kb deletion at Xq13.1q13.1 (chrX: 68 796 566-69 138 468). As verified by PCR-electrophoresis, the deletion has removed part of the EDA gene. The deletion was derived from his mother with normal hair, mild xerosis cutis, and sparse, decidulated and nail-like teeth. The mother was detected with a heterozygous 242.10 kb deletion at Xq13.1q13.1 (chrX: 68 836 154-69 078 250). CONCLUSION Both the proband and his mother have carried a Xq13.1 microdeletion involving part of the EDA gene. The clinical phenotypes of the mother and the proband were consistent with the clinical characteristics of X-linked recessive HED, for which partial deletion of the EDA gene is probably accountable.
Child ; DNA Copy Number Variations ; Ectodermal Dysplasia ; Ectodermal Dysplasia 1, Anhidrotic/genetics* ; Ectodysplasins/genetics* ; Humans ; Male ; Phenotype

OBJECTIVE: To analyze the clinical phenotype and genetic variant of a child with Snijders Blok-Campeau syndrome (SBCS). METHODS: A child who was diagnosed with SBCS in June 2017 at Henan Children's Hospital was selected as the study subject. Clinical data of the child was collected. Peripheral blood samples of the child and his parents were collected and the extraction of genomic DNA, which was subjected to trio-whole exome sequencing (trio-WES) and genome copy number variation (CNV) analysis. Candidate variant was verified by Sanger sequencing of his pedigree members. RESULTS: The main clinical manifestations of the child have included language delay, intellectual impairment and motor development delay, which were accompanied with facial dysmorphisms (broad forehead, inverted triangular face, sparse eyebrows, widely spaced eyes, narrow palpebral fissures, broad nose bridge, midface hypoplasia, thin upper lip, pointed jaw, low-set ears and posteriorly rotated ears). Trio-WES and Sanger sequencing revealed that the child has harbored a heterozygous splicing variant of the CHD3 gene, namely c.4073-2A>G, for which both of his parents were of wild-type. No pathogenic variant was identified by CNV testing. CONCLUSION The c.4073-2A>G splicing variant of the CHD3 gene probably underlay the SBCS in this patient.
DNA Copy Number Variations ; Heterozygote ; Pedigree ; Phenotype ; RNA Splicing ; Mutation

Clinical data and genetic mutation characteristics of a patient with Coffin-Siris syndrome by 6q25.3 deletion were summarized. The child was a 7-year and 6-month old girl who had feeding difficulties, repeated infection, language and motor retardation, low intelligence, laryngeal cartilage dysplasia, thick eyebrows, sparse teeth, hairy back, hyperactivity and aggressive behavior, seizures and ataxia. There was no abnormality in chromosomal karyotype analysis by proband; genomic copy number variant sequencing (CNV-seq) indicated approximately 4.27 Mb heterozygous deletion in chromosome 6q25.3 region, with 17 genes including ARID1B gene, father maternal CNV-seq showing no abnormalities. Trio-whole-exome sequencing showed the proband missed all exons 1-20 of the ARID1B gene, with wild-type parents. The proband had severe clinical symptoms and haplodose insufficiency which was the genetic etiology.