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Irritable bowel syndrome (IBS) is a common functional gastrointestinal disease in children and has the clinical manifestations of recurrent abdominal pain with the changes in defecation frequency or stool form. Many studies have shown that children with IBS have a significantly lower vitamin D level than the healthy population, and vitamin D supplementation can significantly improve the clinical symptoms and quality of life of the children, suggesting that vitamin D supplementation may play a role in the treatment of IBS. This article reviews the association between vitamin D and IBS in children and elaborates on the possible mechanism of action of vitamin D.This is a case report on a 1-day-old male neonate admitted due to a weak cry for 1 day and recurrent circumoral cyanosis for 2 hours. He had unusual facial features at birth, with a single transverse palmar crease on both hands, flat feet, weak cry, feeding difficulties, congenital heart disease, and abnormality on cerebral MRI. Whole exome sequencing showed a de novo mutation, c.778_781delAAAG(p.Lys260ValfsTer2), in exon 3 of the CTCF gene, which was considered a pathogenic mutation by protein function prediction and might damage the function of CTCF protein. He was diagnosed with autosomal dominant intellectual disability type 21 based on the clinical manifestations and genetic analysis results. This case suggests that genetic analysis should be performed as early as possible for neonates with feeding difficulties which cannot be explained by infection or hypoxia, so as to help with early diagnosis and genetic counselling.<br />To study the effect of different melatonin treatment regimens on long-term behavior and white matter damage in neonatal rats with hypoxic-ischemic brain damage (HIBD), and to seek an optimal melatonin treatment regimen.<br />Healthy Sprague-Dawley rats, aged 7 days, were randomly divided into four groups sham-operation, HIBD, single-dose immediate treatment (SDIT), and 7-day continuous treatment (7DCT), with 8 rats in each group. A neonatal rat model of HIBD was prepared according to the classical Rice-Vannucci method. On day 21 after HIBD, the Morris water maze test was used to evaluate spatial learning and memory abilities. On day 70 after HIBD, immunofluorescence assay was used to measure the expression of neuronal nuclear antigen (NeuN) in the cerebral cortex and the hippocampal CA1 region of neonatal rats, and double-label immunofluorescence was used to measure the expression of myelin basic protein (MBP) and neurofilament 200 (NF200) in the corpus striatum and the corpus callosum.<br />The results of the Moove long-term behavior and reduce white matter damage in neonatal rats with HIBD, and 7DCT is more effective than SDIT.<br />Both SDIT and 7DCT can improve long-term behavior and reduce white matter damage in neonatal rats with HIBD, and 7DCT is more effective than SDIT.<br />To study the role and mechanism of histone deacetylase 1 (HDAC1) and histone deacetylase 2 (HDAC2) in mouse neuronal development.<br />The mice with Synapsin1-Cre recombinase were bred with<br />mice to obtain the mice with neuron-specific<br />conditional knockout (knockout group), and their littermates without<br />knockout were used as the control group. The general status of the mice was observed and survival curves were plotted. Brain tissue samples were collected from the knockout group and the control group. Western blot and immunohistochemistry were used to measure the protein expression of related neuronal and axonal markers, neuronal nuclear antigen (NeuN), non-phosphorylated neurofilament heavy chain (np-NF200), and phosphorylated neurofilament heavy chain (p-NF200), as well as the downstream effector of the mTOR signaling pathway, phosphorylated S6 ribosomal protein (p-S6).<br />The mice with<br />conditional knockout usually died within one month after birth and were significantly smaller than those in the control group, with motor function abnormalities such as tremor and clasping of hindlimbs. [https://www.selleckchem.com/products/azd1390.html PI3K inhibitor] Compared with the control group, the knockout group had significant reductions in the protein expression levels of NeuN, np-NF200, p-NF200, and p-S6 (<br />&lt; 0.05;<br />=3).<br />Deletion of<br />and<br />in mouse neurons results in reduced neuronal maturation and axonal dysplasia, which may be associated with the mTOR signaling pathway.<br />Deletion of HDAC1 and HDAC2 in mouse neurons results in reduced neuronal maturation and axonal dysplasia, which may be associated with the mTOR signaling pathway.A girl, aged 15 years, was admitted due to sudden convulsion once and multiple pulmonary nodules on lung CT. Acrocyanosis or acropachy/toe deformity was not observed. Laboratory examinations showed an increase in hemoglobin (162 g/L) and a reduction in arterial partial pressure of oxygen (61.5 mm Hg). Lung CT showed irregular slightly high-density nodules in the middle lobe of the right lung, and contrast-enhanced CT scan showed obvious enhancement with thick vascular shadow locally. An investigation of medical history revealed that the girl's mother had a history of epistaxis and resection of pulmonary mass and the girl presented with tongue telangiectasia. The girl was diagnosed with hereditary hemorrhagic telangiectasia and pulmonary arteriovenous malformation. she was given interventional embolization therapy. Transcutaneous oxygen saturation reached 98% without oxygen inhalation on the day after surgery. Pulmonary angiography at 3 months after surgery showed the recurrence of pulmonary vascular malformation, and embolization of pulmonary arterial fistula was not performed since the guide wire could not enter the branch artery. There was still a need for long-term follow-up.A healthy full-term female neonate, aged 3 days and born by vaginal delivery (with a 1-minute Apgar score of 10 and a 5-minute Apgar score of 10), had unexpected cardiac and respiratory arrests in the early morning on day 3 after birth and recovered to spontaneous breathing and heartbeat after a 10-minute resuscitation. The child had poor response and convulsion after resuscitation. Blood gas analysis showed metabolic acidosis, and amplitude-integrated EEG showed a burst-suppression pattern. She was diagnosed with sudden unexpected postnatal collapse but improved after hypothermia and symptomatic/supportive treatment. This article reports the first case of sudden unexpected postnatal collapse in China and summarizes related risk factors, pathophysiological mechanisms, and preventive and treatment measures of this disorder.