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1.
Anal Chem ; 95(34): 12768-12775, 2023 08 29.
Artigo em Inglês | MEDLINE | ID: mdl-37587155

RESUMO

Herein, a surface-enhanced Raman scattering (SERS) biosensor was constructed by gold nanobipyramid (Au NBP) hotspot aggregation-induced SERS (HAI-SERS) for the ultrasensitive detection of microRNA-221 (miRNA-221). Impressively, compared with single Au NBP, the multiple Au NBPs assembled by tetrahedral DNA nanostructures (TDNs) could increase hotspot aggregation to significantly enhance the SERS signal of Raman molecule methylene blue (MB). Meanwhile, in the aid of Exo-III assisted target cycle amplification and TDNs-induced catalytic hairpin assembly (CHA) amplification, the biosensor could achieve the sensitive detection of miRNA-221 with a linear range of 1 fM-10 nM, and the limit of detection (LOD) was 0.59 fM, which could be used for practical application in MHCC-97L and MCF-7 cell lysates. This work provided a method for hotspot aggregation to enhance SERS for the detection of biomarkers and disease diagnosis.


Assuntos
MicroRNAs , Análise Espectral Raman , Catálise , Ouro , Limite de Detecção
2.
Radiology ; 307(3): e222061, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36853181

RESUMO

Background Quantitative T1, T2, and T2* measurements of carotid atherosclerotic plaque are important in evaluating plaque vulnerability and monitoring its progression. Purpose To develop a sequence to simultaneously quantify T1, T2, and T2* of carotid plaque. Materials and Methods The simultaneous T1, T2, and T2* mapping of carotid plaque (SIMPLE*) sequence is composed of three modules with different T2 preparation pulses, inversion-recovery pulses, and acquisition schemas. Single-echo data were used for T1 and T2 quantification, while the multiecho (ME) data were used for T2* quantification. The quantitative accuracy of SIMPLE* was tested in a phantom study by comparing its measurements with those of reference standard sequences. In vivo feasibility of the technique was prospectively evaluated between November 2020 and February 2022 in healthy volunteers and participants with carotid atherosclerotic plaque. The Pearson or Spearman correlation test, Student t test, and Wilcoxon rank-sum test were used. Results T1, T2, and T2* estimated with SIMPLE* strongly correlated with inversion-recovery spin-echo (SE) (correlation coefficient [r] = 0.99), ME-SE (r = 0.99), and ME gradient-echo (r = 0.99) sequences in the phantom study. In five healthy volunteers (mean age, 25 years ± 3 [SD]; three women), measurements were similar between SIMPLE* and modified Look-Locker inversion recovery, or MOLLI (1151 msec ± 71 vs 1098 msec ± 64; P = .14), ME turbo SE (31 msec ± 1 vs 31 msec ± 1; P = .32), and ME turbo field echo (24 msec ± 2 vs 25 msec ± 2; P = .19). In 18 participants with carotid plaque (mean age, 65 years ± 9; 16 men), quantitative T1, T2, and T2* of plaque components were consistent with their signal characteristics on multicontrast images. Conclusion A quantitative technique for simultaneous T1, T2, and T2* mapping of carotid plaque with 100-mm3 coverage and 0.8-mm3 resolution was developed using the proposed SIMPLE* sequence and demonstrated high accuracy and in vivo feasibility. © RSNA, 2023 Supplemental material is available for this article.


Assuntos
Placa Aterosclerótica , Masculino , Humanos , Feminino , Adulto , Idoso , Interpretação de Imagem Assistida por Computador/métodos , Artérias Carótidas , Imageamento por Ressonância Magnética/métodos , Imagens de Fantasmas , Reprodutibilidade dos Testes
3.
Am J Pathol ; 192(3): 395-405, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-34890556

RESUMO

Neural epidermal growth factor-like (EGFL)-like protein (NELL)-1 is a potent and key osteogenic factor in the development and regeneration of skeletal tissues. Intriguingly, accumulative data from genome-wide association studies (GWASs) have started unveiling potential broader roles of NELL-1 beyond its functions in bone and cartilage. With exploration of the genetic variants of the entire genome in large-scale disease cohorts, GWASs have been used for establishing the connection between specific single-nucleotide polymorphisms of NELL1, in addition to osteoporosis, metabolic diseases, inflammatory conditions, neuropsychiatric diseases, neurodegenerative disorders, and malignant tumors. This review summarizes the findings from GWASs on the manifestation, significance level, implications on function, and correlation of specific NELL1 single-nucleotide polymorphisms in various disorders in humans. By offering a unique and comprehensive correlation between genetic variants and plausible functions of NELL1 in GWASs, this review illustrates the wide range of potential effects of a single gene on the pathogenesis of multiple disorders in humans.


Assuntos
Proteínas de Ligação ao Cálcio , Estudo de Associação Genômica Ampla , Osteoporose , Humanos , Proteínas de Ligação ao Cálcio/genética , Proteínas de Ligação ao Cálcio/metabolismo , Cartilagem , Osteogênese , Polimorfismo de Nucleotídeo Único
4.
J Sci Food Agric ; 103(12): 5904-5915, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37185886

RESUMO

BACKGROUND: Soy protein isolate (SPI) can be used as an emulsifier to stabilize emulsions, though SPI is unstable under low acidic conditions. Stable composite particles of SPI and dextran sulfate (DS) can be formed by the electrostatic interaction at the pH 3.5. Furthermore, the SPI/DS composite particles can be used to prepare a high complex concentration emulsion. The stabilization properties of the high complex concentration emulsion were investigated. RESULTS: Compared to uncompounded SPI, the particle size of SPI/DS composite particles was smaller at 1.52 µm, and the absolute value of the potential increased to 19.9 mV when the mass ratio of SPI to DS was 1:1 and the pH was 3.5. With the DS ratio increased, the solubility of the composite particles increased to 14.44 times of the untreated protein at pH 3.5, while the surface hydrophobicity decreased. Electrostatic interactions and hydrogen bonds were the main forces between SPI and DS, and DS was electrostatically adsorbed on the surface of SPI. The emulsion stability significantly enhanced with the increase of complex concentration (38.88 times higher than at 1% concentration), the emulsion average droplet size was the lowest (9.64 µm), and the absolute value of potential was the highest (46.67 mV) when the mass ratio of SPI to DS was 1:1 and the complex concentration of 8%. The stability of the emulsion against freezing was improved. CONCLUSION: The SPI/DS complex has high solubility and stability under low acidic conditions, and the emulsion of the SPI/DS complex has good stability. © 2023 Society of Chemical Industry.


Assuntos
Emulsificantes , Proteínas de Soja , Proteínas de Soja/química , Emulsões/química , Sulfato de Dextrana , Emulsificantes/química , Tamanho da Partícula
5.
Dev Biol ; 471: 97-105, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33340512

RESUMO

During neurulation, cranial neural crest cells (CNCCs) migrate long distances from the neural tube to their terminal site of differentiation. The pathway traveled by the CNCCs defines the blueprint for craniofacial construction, abnormalities of which contribute to three-quarters of human birth defects. Biophysical cues like naturally occurring electric fields (EFs) have been proposed to be one of the guiding mechanisms for CNCC migration from the neural tube to identified position in the branchial arches. Such endogenous EFs can be mimicked by applied EFs of physiological strength that has been reported to guide the migration of amphibian and avian neural crest cells (NCCs), namely galvanotaxis or electrotaxis. However, the behavior of mammalian NCCs in external EFs has not been reported. We show here that mammalian CNCCs migrate towards the anode in direct current (dc) EFs. Reversal of the field polarity reverses the directedness. The response threshold was below 30 â€‹mV/mm and the migration directedness and displacement speed increased with increase in field strength. Both CNCC line (O9-1) and primary mouse CNCCs show similar galvanotaxis behavior. Our results demonstrate for the first time that the mammalian CNCCs respond to physiological EFs by robust directional migration towards the anode in a voltage-dependent manner.


Assuntos
Região Branquial/embriologia , Diferenciação Celular , Movimento Celular , Eletricidade , Transdução de Sinais , Animais , Região Branquial/citologia , Linhagem Celular , Camundongos , Crista Neural/citologia
6.
Int J Health Plann Manage ; 37(4): 1973-1989, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35212026

RESUMO

In this study, we explored the strategies and suggestions for the outpatient diversion system of large hospitals in Chinese underdeveloped areas of primary medical care, under the consideration of balancing patients' intention and compliance with the referral system. An empirical study was conducted on the relationship among medical need, visiting intention and health-seeking behaviour to verify the effect of intention-system mixed outpatient diversion mode in China's large hospitals. Examination of the demographic characteristics, insurance, and residence information revealed that outpatients could be divided into three categories before the application of the referral system. Then, due to the implementation of the referral system, the willingness of some patients to seek medical treatment has changed. Consequently, the service path for outpatients could be consolidated into two categories with differentiated behavioural characteristics, which were respectively driven by personal intention and service system. According to the utility value intervention of the referral system for outpatient seeking behaviour, some measures and strategies can be explored to build a new system that combines personal connotation and system utility to realise the effective distribution and management of outpatients in large hospitals in Chinese underdeveloped areas.


Assuntos
Intenção , Pacientes Ambulatoriais , China , Hospitais , Humanos , Encaminhamento e Consulta
7.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 39(7): 763-767, 2022 Jul 10.
Artigo em Chinês | MEDLINE | ID: mdl-35810438

RESUMO

OBJECTIVE: To explore the genetic basis for a child with mental retardation. METHODS: The child was subjected to chromosomal microarray analysis (CMA) and targeted capture next-generation sequencing for the exons of genes related to genetic and metabolic diseases. Candidate variants were verified by Sanger sequencing of the child and his parents. RESULTS: CMA suggested that the child has a 47,XYY karyotype. Next-generation sequencing revealed that the child has harbored compound heterozygous variants of the AUH gene, including c.677G>A (p.R226H) and c.373C>T (p.R125W), which were respectively inherited from his parents. Based on the American college of Medical Genetics and Genomics (ACMG) standards and guidelines, the c.677G>A (P.r226h) variant was predicted as variant of uncertain significance (PM2+PP4+PP3), whilst the c.373C>T (P.R125W) variant was predicted as likely pathogenic (PM1+PM2+PP3+PP4). CONCLUSION: The child had XYY syndrome in conjunct with 3-methylglutaenedioic aciduria type I due to biallelic pathogenic variants of the AUH gene.


Assuntos
Transtornos dos Cromossomos Sexuais , Cariótipo XYY , Criança , Testes Genéticos , Humanos , Masculino , Mutação
8.
Biochem Biophys Res Commun ; 574: 20-26, 2021 10 15.
Artigo em Inglês | MEDLINE | ID: mdl-34425282

RESUMO

Retinoblastoma is an intraocular malignant tumor and generally occurred in childhood. Here, we intended to appraise the functional influence of microRNA-142-5p (miR-142-5p) in retinoblastoma. MiR-142-5p was declined, and MYCN was upregulated in retinoblastoma tissues and cells. Moreover, miR-142-5p restricted cell proliferation, migration, invasion, and enhanced cell apoptosis in retinoblastoma cells. MYCN was adversely controlled by miR-142-5p. Besides, the inhibition of miR-142-5p-mediated effects on retinoblastoma progression were blocked by MYCN overexpression in retinoblastoma cells. This research illustrated that miR-142-5p restricted retinoblastoma progression via interacting with MYCN.


Assuntos
MicroRNAs/metabolismo , Proteína Proto-Oncogênica N-Myc/metabolismo , Retinoblastoma/metabolismo , Células Cultivadas , Humanos , MicroRNAs/genética , Proteína Proto-Oncogênica N-Myc/genética , Retinoblastoma/patologia
9.
J Clin Lab Anal ; 35(4): e23732, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33591573

RESUMO

BACKGROUND: The aim of our study was to estimate the association of ficolin-1 (FCN1) gene (rs10120023, rs1071583) and ficolin-3 (FCN3) gene (rs3813800, rs10794501) polymorphisms and pulmonary tuberculosis (PTB) susceptibility, as well as their several clinical features, in a Chinese population. METHODS: This study included a cohort of 489 PTB patients and 489 healthy controls, and the four SNPs were genotyped by improved multiple ligase detection reaction (iMLDR). RESULTS: We found that there were no significant differences regarding the allele and genotype frequencies of FCN1 rs10120023, rs1071583 and FCN3 rs3813800, rs10794501 between PTB patients and healthy controls (all p > 0.05). The association of three main haplotypes (CC, CT, and TC) in FCN1 and three main haplotypes (CT, GA, and GT) in FCN3 with PTB susceptibility was also analyzed, and no significant association was detected (all p > 0.05). In FCN1, the rs1071583 TT genotype was significantly associated with the occurrence of drug resistance in PTB patients (p = 0.040). In addition, the GG genotype and G allele frequencies of rs3813800 in FCN3 gene were significantly higher in PTB patients with pulmonary infection (p = 0.027, p = 0.020, respectively). CONCLUSIONS: FCN1 and FCN3 genetic variation were not contributed to the pathogenesis of PTB in Chinese. While rs1071583 and rs3813800 variant might associate with several clinical characteristics of PTB.


Assuntos
Povo Asiático/genética , Predisposição Genética para Doença , Lectinas/genética , Polimorfismo de Nucleotídeo Único/genética , Tuberculose Pulmonar/genética , Adulto , Estudos de Casos e Controles , China , Feminino , Frequência do Gene/genética , Estudos de Associação Genética , Haplótipos/genética , Humanos , Masculino , Ficolinas
10.
Int J Health Plann Manage ; 36(5): 1714-1726, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34060654

RESUMO

PURPOSE: Provide new methods to predict the number of hospital blood collections. METHODS: The registered outpatients and blood collection patients in a large hospital in China in the period from March 2018 to April 2019 were enrolled in the study. Firstly, we analyzed the time series characteristics of the daily blood collection patients and their correlation with the number of daily outpatients. Then, we used the time series ARIMA and linear regression methods to build the periodic trend model of the blood collections number prediction and the regression prediction model with the number of registered outpatients as an independent variable. Finally, we built a combined prediction model considering mixed time series to predict the number of blood collections in the hospital. RESULTS: The combined prediction model has a higher accuracy and can better explore the characteristics of the number of blood collections compared with other models. It can also give some suggestions for a reasonable blood collection management. CONCLUSION: The combined prediction model of mixed time series can reflect the change in the blood collections number due to the influence of internal and external factors and can realize the blood collection prediction with a higher accuracy providing a new method for the prediction of the blood collections number.


Assuntos
Hospitais , Pacientes Ambulatoriais , China , Previsões , Humanos , Modelos Lineares , Modelos Estatísticos
11.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 38(6): 569-572, 2021 Jun 10.
Artigo em Chinês | MEDLINE | ID: mdl-34096028

RESUMO

OBJECTIVE: To assess the value of chromosomal microarray analysis (CMA) to verify a fetus with partial 18p deletion signaled by non-invasive prenatal testing. METHODS: G-banding chromosomal karyotyping analysis was carried out on amniotic fluid sample of the fetus and peripheral blood samples from the parents. Amniotic DNA was also subjected to CMA analysis. The fetus was also subjected to systematic ultrasound scan. RESULTS: The fetus was found to have a karyotype of 46,XX,18p+. CMA has revealed a 5 Mb deletion at 18p11.32-p11.31, a 2.9 Mb duplication at 18p11.31-p11.23, and a 2.5 Mb duplication at 18p11.23-p11.22. No chromosomal aberration or microdeletion/microduplication was detected in either parent. CONCLUSION: Non-invasive prenatal testing and CMA are both sensitive for the detection of chromosomal microdeletions and microduplications. CMA can help with clarification of genotype-phenotype correlation and facilitate prenatal diagnosis and genetic counseling for the family.


Assuntos
Deleção Cromossômica , Diagnóstico Pré-Natal , Cromossomos , Feminino , Feto , Humanos , Cariotipagem , Gravidez
12.
Am J Pathol ; 189(3): 648-664, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30593824

RESUMO

The Food and Drug Administration-approved clinical dose (1.5 mg/mL) of bone morphogenetic protein-2 (BMP2) has been reported to induce significant adverse effects, including cyst-like adipose-infiltrated abnormal bone formation. These undesirable complications occur because of increased adipogenesis, at the expense of osteogenesis, through BMP2-mediated increases in the master regulatory gene for adipogenesis, peroxisome proliferator-activated receptor-γ (PPARγ). Inhibiting PPARγ during osteogenesis has been suggested to drive the differentiation of bone marrow stromal/stem cells toward an osteogenic, rather than an adipogenic, lineage. We demonstrate that knocking down PPARγ while concurrently administering BMP2 can reduce adipogenesis, but we found that it also impairs BMP2-induced osteogenesis and leads to bone nonunion in a mouse femoral segmental defect model. In addition, in vitro studies using the mouse bone marrow stromal cell line M2-10B4 and mouse primary bone marrow stromal cells confirmed that PPARγ knockdown inhibits BMP2-induced adipogenesis; attenuates BMP2-induced cell proliferation, migration, invasion, and osteogenesis; and escalates BMP2-induced cell apoptosis. More important, BMP receptor 2 and 1B expression was also significantly inhibited by the combined BMP2 and PPARγ knockdown treatment. These findings indicate that PPARγ is critical for BMP2-mediated osteogenesis during bone repair. Thus, uncoupling BMP2-mediated osteogenesis and adipogenesis using PPARγ inhibition to combat BMP2's adverse effects may not be feasible.


Assuntos
Proteína Morfogenética Óssea 2/metabolismo , Regeneração Óssea , Fêmur , Osteogênese , PPAR gama/metabolismo , Adipogenia/genética , Animais , Proteína Morfogenética Óssea 2/farmacologia , Linhagem Celular , Movimento Celular/efeitos dos fármacos , Movimento Celular/genética , Proliferação de Células/efeitos dos fármacos , Proliferação de Células/genética , Fêmur/lesões , Fêmur/metabolismo , Fêmur/patologia , Técnicas de Silenciamento de Genes , Humanos , Masculino , Camundongos , Camundongos Transgênicos , PPAR gama/genética
13.
Proc Natl Acad Sci U S A ; 114(35): E7218-E7225, 2017 08 29.
Artigo em Inglês | MEDLINE | ID: mdl-28808036

RESUMO

Patients with cleft lip and/or palate (CLP), who undergo numerous medical interventions from infancy, can suffer from lifelong debilitation caused by underdeveloped maxillae. Conventional treatment approaches use maxillary expansion techniques to develop normal speech, achieve functional occlusion for nutrition intake, and improve esthetics. However, as patients with CLP congenitally lack bone in the cleft site with diminished capacity for bone formation in the expanded palate, more than 80% of the patient population experiences significant postexpansion relapse. While such relapse has been a long-standing battle in craniofacial care of patients, currently there are no available strategies to address this pervasive problem. Estrogen, 17ß-estradiol (E2), is a powerful therapeutic agent that plays a critical role in bone homeostasis. However, E2's clinical application is less appreciated due to several limitations, including its pleiotropic effects and short half-life. Here, we developed a treatment strategy using an injectable system with photo-cross-linkable hydrogel (G) and nanodiamond (ND) technology to facilitate the targeted and sustained delivery of E2 to promote bone formation. In a preclinical expansion/relapse model, this functionalized E2/ND/G complex substantially reduced postexpansion relapse by nearly threefold through enhancements in sutural remodeling compared with unmodified E2 administration. The E2/ND/G group demonstrated greater bone volume by twofold and higher osteoblast number by threefold, compared with the control group. The E2/ND/G platform maximized the beneficial effects of E2 through its extended release with superior efficacy and safety at the local level. This broadly applicable E2 delivery platform shows promise as an adjuvant therapy in craniofacial care of patients.


Assuntos
Estrogênios/farmacologia , Nanodiamantes/uso terapêutico , Técnica de Expansão Palatina/instrumentação , Animais , Fenda Labial/cirurgia , Fissura Palatina/terapia , Modelos Animais de Doenças , Feminino , Hidrogel de Polietilenoglicol-Dimetacrilato/farmacologia , Nanoestruturas/uso terapêutico , Ratos , Ratos Sprague-Dawley , Recidiva , Prevenção Secundária/métodos , Resultado do Tratamento
14.
Clin Exp Ophthalmol ; 48(6): 821-829, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32356563

RESUMO

BACKGROUND: TGF-ß2-induced epithelial-mesenchymal transition (EMT) is an important mechanism for posterior capsule opacity (PCO) in lens epithelial cells (LECs). This study aimed to investigate if MicroRNA-184 (miR-184) plays a role in the TGF-ß2-induced EMT in LECs. METHODS: Human LECs (HLE-B3 cells) were used in this study. Quantitative real-time polymerase chain reaction (PCR) (qRT-PCR) was performed to analyse miR-184 expressions in HLE-B3 treated with TGF-ß2 at different concentrations (0-15 ng/mL) and different time (10 ng/mL, 0-48 hours). After transfection of miR-184 mimics or miR-184 inhibitor, cells were treated with 10 ng/mL TGF-ß2 for 24 hours, and the expression levels of miR-184, E-cadherin, vimentin, zinc finger E-box binding homeobox 2 (ZEB2), α-Smooth muscle actin (α-SMA), Collagen 1 and bin3 were determined by qRT-PCR and Western blot, respectively. RESULTS: TGF-ß2 treatment significantly downregulated E-cadherin and upregulated vimentin generally in a dose-dependent and time-dependent manner. TGF-ß2 treatment significantly elevated the level of miR-184 in both dose- and time-dependent manners. In addition, transfection of miR-184 inhibitor RNA significantly attenuated TGF-ß2-induced downregulation of E-cadherin as well as upregulation of vimentin, ZEB2, α-SMA and Collagen 1, whereas transfection of miR-184 mimic further enhanced the effects of TGF-ß2 on the expressions of these markers. Furthermore, TGF-ß2 treatment significantly downregulated bin3, and transfection of miR-184 mimic and miR-184 inhibitor significantly enhanced and attenuated the inhibition effect of TGF-ß2 on bin3, respectively. CONCLUSIONS: miR-184 plays a key role in the TGF-ß2-induced EMT in LECs, and bin3 may be a downstream protein.


Assuntos
Cristalino , MicroRNAs , Células Cultivadas , Células Epiteliais , Transição Epitelial-Mesenquimal , Humanos , MicroRNAs/genética , Transdução de Sinais , Fator de Crescimento Transformador beta2/farmacologia , Fatores de Crescimento Transformadores
15.
Hum Hered ; 84(1): 1-8, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31461710

RESUMO

Quantum-inspired genetic algorithms (QGAs) were recently introduced for the prediction of RNA secondary structures, and they showed some superiority over the existing popular strategies. In this paper, for RNA secondary structure prediction, we introduce a new QGA named multi-population assisted quantum genetic algorithm (MAQGA). In contrast to the existing QGAs, our strategy involves multi-populations which evolve together in a cooperative way in each iteration, and the genetic exchange between various populations is performed by an operator transfer operation. The numerical results show that the performances of existing genetic algorithms (evolutionary algorithms [EAs]), including traditional EAs and QGAs, can be significantly improved by using our approach. Moreover, for RNA sequences with middle-short length, the MAQGA improves even this state-of-the-art software in terms of both prediction accuracy and sensitivity.


Assuntos
Algoritmos , RNA/química , Sequência de Bases
16.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 37(8): 851-854, 2020 Aug 10.
Artigo em Chinês | MEDLINE | ID: mdl-32761593

RESUMO

OBJECTIVE: To explore the genetic basis for a child with global developmental delay and neurofibromatosis type 1 (NF1). METHODS: The patient underwent clinical examination. Whole exome sequencing (WES) was carried out to detect pathogenic genetic variants. RESULTS: The child had cafe au lait spots all over her body, pigmentation in the back, and global developmental delay as assessed by Gese II. Cranial MRI revealed globular abnormal density in the lower hemisphere of left posterior cranial fossa. WES detected a novel variant of the NF1 gene, c.6513-6515del (p.Tyr2171), which was strongly correlated with her clinical phenotype. The same variant was not found in either parent and was unreported previously. CONCLUSION: The c.3842T>G variant of the NF1 gene probably underlay the NF1 and global developmental delay in this child, for whom prompt symptomatic treatment and regular follow-up were recommended.


Assuntos
Deficiências do Desenvolvimento , Genes da Neurofibromatose 1 , Testes Genéticos , Neurofibromatose 1 , Manchas Café com Leite/diagnóstico , Manchas Café com Leite/genética , Criança , Deficiências do Desenvolvimento/diagnóstico , Deficiências do Desenvolvimento/genética , Feminino , Humanos , Neurofibromatose 1/diagnóstico , Neurofibromatose 1/genética , Fenótipo
17.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 37(1): 57-59, 2020 Jan 10.
Artigo em Chinês | MEDLINE | ID: mdl-31922598

RESUMO

OBJECTIVE: To explore the genetic basis of a child with idiopathic mental retardation. METHODS: Clinical data and peripheral blood sample of the child were collected. Genomic DNA was extracted and subjected to copy number analysis using single nucleotide polymrophism array comparative genome hybridization (SNP-aCGH) and targeted capture and next generation sequencing (NGS). RESULTS: No microdeletion/microduplication were detected by SNP-aCGH. NGS has detected homozygous c.722delA (p.Asp241fs) variant of the LISN1 gene, which is known to underlie autosomal recessive mental retardation-27 (MRT 27). Both parents are carriers of the variant, conforming to the autosomal recessive inheritance. CONCLUSION: A novel pathogenic variant of the LINS1 gene has been identified, which probably underlies the MRT 27 in the patient.


Assuntos
Deficiência Intelectual , Proteínas , Criança , Hibridização Genômica Comparativa , Sequenciamento de Nucleotídeos em Larga Escala , Homozigoto , Humanos , Deficiência Intelectual/genética , Proteínas/genética
18.
Am J Pathol ; 188(2): 392-403, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29137952

RESUMO

The pro-chondrogenic function of runt-related transcription factor 2 (Runx2) was previously considered to be dependent on direct binding with the promoter of Indian hedgehog (Ihh)-the major regulator of chondrocyte differentiation, proliferation, and maturation. The authors' previous studies identified neural EGFL like 1 (Nell-1) as a Runx2-responsive growth factor for chondrogenic differentiation and maturation. In this study, it was further revealed that the pro-chondrogenic activities of Nell-1 also rely on Ihh signaling, by showing: i) Nell-1 significantly elevated Ihh signal transduction; ii) Nell-1 deficiency markedly reduced Ihh activation in chondrocytes; and iii) Nell-1-stimulated chondrogenesis was significantly reduced by the specific hedgehog inhibitor cyclopamine. Importantly, the authors demonstrated that Nell-1-responsive Ihh signaling and chondrogenic differentiation extended to Runx2-/- models in vitro and in vivo. In Runx2-/- chondrocytes, Nell-1 stimulated the expression and signal transduction of Runx3, another transcription factor required for complete chondrogenic differentiation and maturation. Furthermore, knocking down Runx3 in Runx2-/- chondrocytes abolished Nell-1's stimulation of Ihh-associated molecule expression, which validates Runx3 as a major mediator of Nell-1-stimulated Ihh activation. For the first time, the Runx2→Nell-1→Runx3→Ihh signaling cascade during chondrogenic differentiation and maturation has been identified as an alternative, but critical, pathway for Runx2 to function as a pro-chondrogenic molecule via Nell-1.


Assuntos
Proteínas de Ligação ao Cálcio/fisiologia , Condrócitos/fisiologia , Subunidade alfa 1 de Fator de Ligação ao Core/fisiologia , Glicoproteínas/fisiologia , Proteínas Hedgehog/fisiologia , Animais , Cartilagem/citologia , Cartilagem/fisiologia , Diferenciação Celular/fisiologia , Células Cultivadas , Condrócitos/citologia , Condrogênese/fisiologia , Subunidade alfa 1 de Fator de Ligação ao Core/deficiência , Subunidade alfa 3 de Fator de Ligação ao Core/fisiologia , Camundongos Knockout , Transdução de Sinais/fisiologia
19.
Am J Pathol ; 188(3): 715-727, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29294300

RESUMO

Fractures are common, with an incidence of 13.7 per 1000 adults annually. Systemic agents have been widely used for enhancing bone regeneration; however, the efficacy of these therapeutics for the management and prevention of fracture remains unclear. NEL-like protein 1 (NELL-1) is a potent pro-osteogenic cytokine that has been modified with polyethylene glycol (PEG)ylation [PEGylated NELL-1 (NELL-PEG)] to enhance its pharmacokinetics for systemic therapy. Our aim was to investigate the effects of systemic administration of NELL-PEG on fracture healing in mice and on overall bone properties in uninjured bones. Ten-week-old CD-1 mice were subjected to an open osteotomy of bilateral radii and treated with weekly injections of NELL-PEG or PEG phosphate-buffered saline as control. Systemic injection of NELL-PEG resulted in improved bone mineral density of the fracture site and accelerated callus union. After 4 weeks of treatment, mice treated with NELL-PEG exhibited substantially enhanced callus volume, callus mineralization, and biomechanical properties. NELL-PEG injection significantly augmented bone regeneration, as confirmed by high expression of bone turnover rate, bone formation rate, and mineral apposition rate. Consistently, the immunohistochemistry results also confirmed a high bone remodeling activity in the NELL-PEG-treated group. Our findings suggest that weekly injection of NELL-PEG may have the clinical potential to accelerate fracture union and enhance overall bone properties, which may help prevent subsequent fractures.


Assuntos
Densidade Óssea/efeitos dos fármacos , Proteínas de Ligação ao Cálcio/uso terapêutico , Consolidação da Fratura/efeitos dos fármacos , Fraturas Ósseas/tratamento farmacológico , Glicoproteínas/uso terapêutico , Rádio (Anatomia)/lesões , Animais , Proteínas de Ligação ao Cálcio/farmacologia , Feminino , Glicoproteínas/farmacologia , Camundongos , Modelos Animais , Osteotomia , Rádio (Anatomia)/efeitos dos fármacos , Resultado do Tratamento
20.
Int J Health Plann Manage ; 34(2): 672-692, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30615222

RESUMO

To address, among other issues, the regional and international challenges of the heavy health care burden caused by an aging population, integrated care organizations (ICOs) were proposed at the end of the 20th century for health care delivery. However, the implementation of ICOs has not progressed smoothly, and the current results have not eliminated the imbalance of medical service capabilities among hospitals of different levels. To make up for the deficiency in the current evaluation system at ICOs and offer suggestions for improved sustainable health planning and management, this study establishes a balanced scorecard based on a comprehensive measurement system valid for a Chinese ICO by surveying the staff at the West China Hospital ICO. This study collected valid responses from 216 professional staff members at the ICO via questionnaires. K-means clustering and the coefficient of variation method were used to evaluate the weights of the first- and second-level indicators. The results show the importance ranking of the core perspectives of the ICO balanced scorecard in the following order: patient, internal process, learning and growth, and financial. The weight-based analysis identified the importance ranking of all indicators and pointed to the areas that require close attention in future ICO planning and management.


Assuntos
Prestação Integrada de Cuidados de Saúde/normas , Garantia da Qualidade dos Cuidados de Saúde/métodos , China , Prestação Integrada de Cuidados de Saúde/organização & administração , Técnica Delphi , Humanos , Modelos Organizacionais , Indicadores de Qualidade em Assistência à Saúde/normas , Inquéritos e Questionários
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