Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 124
Filtrar
1.
Respir Res ; 25(1): 254, 2024 Jun 21.
Artigo em Inglês | MEDLINE | ID: mdl-38907347

RESUMO

Tuberculosis (TB) remains the second leading cause of death from a single infectious agent and long-term medication could lead to antituberculosis drug-induced liver injury (ATB-DILI). We established a prospective longitudinal cohort of ATB-DILI with multiple timepoint blood sampling and used untargeted metabolomics to analyze the metabolic profiles of 107 plasma samples from healthy controls and newly diagnosed TB patients who either developed ATB-DILI within 2 months of anti-TB treatment (ATB-DILI subjects) or completed their treatment without any adverse drug reaction (ATB-Ctrl subjects). The untargeted metabolome revealed that 77 metabolites (of 895 total) were significantly changed with ATB-DILI progression. Among them, levels of multiple fatty acids and bile acids significantly increased over time in ATB-DILI subjects. Meanwhile, metabolites of the same class were highly correlated with each other and pathway analysis indicated both fatty acids metabolism and bile acids metabolism were up-regulated with ATB-DILI progression. The targeted metabolome further validated that 5 fatty acids had prediction capability at the early stage of the disease and 6 bile acids had a better diagnostic performance when ATB-DILI occurred. These findings provide evidence indicating that fatty acids metabolism and bile acids metabolism play a vital role during ATB-DILI progression. Our report adds a dynamic perspective better to understand the pathological process of ATB-DILI in clinical settings.


Assuntos
Antituberculosos , Biomarcadores , Doença Hepática Induzida por Substâncias e Drogas , Metabolômica , Humanos , Antituberculosos/efeitos adversos , Masculino , Metabolômica/métodos , Feminino , Doença Hepática Induzida por Substâncias e Drogas/sangue , Doença Hepática Induzida por Substâncias e Drogas/diagnóstico , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , Estudos Longitudinais , Adulto , Pessoa de Meia-Idade , Biomarcadores/sangue , Estudos Prospectivos , Valor Preditivo dos Testes , Tuberculose/tratamento farmacológico , Tuberculose/sangue , Tuberculose/metabolismo , Ácidos e Sais Biliares/sangue , Ácidos e Sais Biliares/metabolismo
2.
Mar Drugs ; 22(6)2024 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-38921570

RESUMO

A new dimeric C-glycoside polyketide chrysomycin F (1), along with four new monomeric compounds, chrysomycins G (2), H (3), I (4), J (5), as well as three known analogues, chrysomycins A (6), B (7), and C (8), were isolated and characterised from a strain of Streptomyces sp. obtained from a sediment sample collected from the South China Sea. Their structures were determined by detailed spectroscopic analysis. Chrysomycin F contains two diastereomers, whose structures were further elucidated by a biomimetic [2 + 2] photodimerisation of chrysomycin A. Chrysomycins B and C showed potent anti-tuberculosis activity against both wild-type Mycobacterium tuberculosis and a number of clinically isolated MDR M. tuberculosis strains.


Assuntos
Antituberculosos , Testes de Sensibilidade Microbiana , Mycobacterium tuberculosis , Policetídeos , Streptomyces , Streptomyces/química , Streptomyces/metabolismo , Mycobacterium tuberculosis/efeitos dos fármacos , Antituberculosos/farmacologia , Antituberculosos/química , Antituberculosos/isolamento & purificação , Policetídeos/farmacologia , Policetídeos/química , Policetídeos/isolamento & purificação , Glicosídeos/química , Glicosídeos/farmacologia , Glicosídeos/isolamento & purificação , China , Estrutura Molecular , Antraquinonas/farmacologia , Antraquinonas/química , Antraquinonas/isolamento & purificação
3.
Plant Dis ; 2024 Apr 19.
Artigo em Inglês | MEDLINE | ID: mdl-38640428

RESUMO

Camellia japonica is an important garden landscape plant in southern China. In April 2022, leaf spot symptoms were observed at the camellia garden of Jiaying University (24°32'83″N, 17 116°12'31″E) in Meizhou city, Guangdong Province, China. The initial symptoms were grayish brown spots on the leaves, as the disease progressed, the lesions were enlarged and affected the whole leaf and eventually led to the loss of its ornamental value. The disease incidence was above 15%. Leaf pieces (5 × 5 mm) from 3 diseased Camellia leaves were sterilized in 75% ethanol for 1 min, then in 1% NaOCl for 1 min; and rinsed three times with sterile water. Leaf pieces were inoculated on potato dextrose agar (PDA) medium and incubated at 25 °C. Three days later, fungal colonies initially showed a white aerial mycelium, turning gray after 5 days, and dark gray after 7 days of incubation. Conidia were single-celled, hyaline, ellipsoidal and without septa. Dimensions of conidia (n≥50) were 14.27 to 20.65 × 4.28 to 6.56 µm. The morphological characteristics matched the genus Neofusicoccum (Pavlic et al. 2009). For molecular identification, the rDNA internal transcribed spacer (ITS1, 5.8S and ITS2) region, translation elongation factor 1-alpha (tef1-α), and beta-tubulin (tub2) of a representative isolate SC6-2 were amplified using the primer pairs ITS1/ITS4, EF1/EF2 and BT2a/-BT2b, respectively (Golzar and Burgess,2011). The sequences obtained were deposited in GenBank (accession nos. PP064173, PP479650 and PP082457 for ITS, tef1-α and tub2, respectively). Nucleotide BLAST analysis showed a 99.81% homology with N. parvum (519/520 bp, OQ509869; 519/520 bp, KF294003; 518/519 bp KF293989) for ITS, 100% homology with N. parvum (398/398 bp, MN318108; 398/398 bp, MK294085; 398/398 bp, MH936021) for tub2, and >99% homology with N. parvum (259/259 bp, 100%, MW390561; 263/265 bp, 99.25%,MN175952; 263/265 bp, 99.25%, MK781982) for tef1-α. The combined phylogenetic analyses (ITS, tef1-α, and tub2) showed that the sequence of the tested isolate and the corresponding sequence of N. parvum (CMW9081, SHSJ1-2) in GenBank grouped in the same branch of the phylogenetic tree. Based on morphological characters, DNA sequencing, and the phylogenetic tree, it can be determined that the pathogen was Neofusicoccum parvum. Inoculation on Camellia leaves was performed to confirm pathogenicity. Nine healthy camellia leaves were pin-pricked with a sterile needle and inoculated with mycelial plugs of isolate SC6-2. Nine other healthy leaves were pin-pricked and inoculated with noncolonized PDA plugs as control leaves. The inoculated leaves were maintained on water agar solid medium at 25°C. To keep a high-humidity environment the inoculation sites were covered by moistened cotton for 2 days. The experiment was repeated three times. Five days after inoculation, all the inoculated leaves showed similar symptoms to those observed in the field, whereas control leaves were asymptomatic for 6 days. The fungal isolates recovered from inoculated leaves were morphologically identical to the N. parvum isolates originally recovered from symptomatic leaves collected in the field, fulfilling Koch's postulates. Neofusicoccum parvum is an aggressive pathogen that causes severe disease on important tree and woody species (Liddle et al. 2019). It has been reported that N. parvum can infect the leaves and branches of grapes (Otoya-Martinez et al. 2023), dieback on Camellia japonica (Pintos, et al. 2012), Brazilian pepperwood (Bertetti et al. 2022), mango (Giancarlo et al. 2023) and other plants. To our knowledge, this is the first report of N. parvum causing leaf spot on Camellia japonica in China.

4.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi ; 41(4): 473-479, 2024 Apr 10.
Artigo em Zh | MEDLINE | ID: mdl-38565515

RESUMO

OBJECTIVE: To summarize the clinical and genetic characteristics, treatment and prognosis of four children with Steroid-resistant nephrotic syndrome (SRNS) due to variants of TRPC6 gene. METHODS: Clinical data of four children with SRNS admitted to Children's Hospital Affiliated to Zhengzhou University between May 2020 and August 2022 were collected. Peripheral blood samples were collected from the children and their parents, and whole exome sequencing was carried out. Sanger sequencing was used to verify the pathogenicity of the candidate variants among the children and their parents. RESULTS: All of the four children were found to harbor heterozygous variants of the TRPC6 gene, including c.523C>T (p.R175W), c.1327T>A (p.F443I), c.430G>C (p.E144Q) (unreported previously), and c.523C>T (p.R175W), which were all missense variants. Two of the children have shown a simple type, whilst two have shown a nephritis type, none had extrarenal phenotype. Comprehensive renal pathology of three children revealed focal segmental glomerulosclerosis (FSGS). Two children were treated with steroids combined with calcineurin inhibitors (CNIs), among whom one showed significant improvement in symptoms. CONCLUSION: Discoveries of the novel c.430G>C variant and the new SRNS phenotype of the c.1327T>A variant have expanded the mutational and phenotypic spectrum of the TRPC6 gene, which has provided a reference for clinical diagnosis and genetic counseling for the families.


Assuntos
Glomerulosclerose Segmentar e Focal , Síndrome Nefrótica , Criança , Humanos , Síndrome Nefrótica/tratamento farmacológico , Síndrome Nefrótica/genética , Síndrome Nefrótica/diagnóstico , Canal de Cátion TRPC6/genética , Canal de Cátion TRPC6/uso terapêutico , Fenótipo , Rim , Genótipo , Mutação , Glomerulosclerose Segmentar e Focal/genética
5.
Cancer Sci ; 114(12): 4548-4557, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37786999

RESUMO

Following carbon ion beam irradiation in mammalian cells, such as used in carbon ion radiotherapy (CIRT), it has been suggested that the balance between whether nonhomologous end joining (NHEJ) or homologous recombination (HR) is utilized depends on the DNA double-strand break (DSB) complexity. Here, we quantified DSB distribution and identified the importance of each DSB repair pathway at increasing depths within the carbon ion spread-out Bragg peak (SOBP) beam range. Chinese hamster ovary (CHO) cell lines were irradiated in a single biological system capable of incorporating the full carbon ion SOBP beam range. Cytotoxicity and DSB distribution/repair kinetics were examined at increasing beam depths using cell survival as an endpoint and γ-H2AX as a surrogate marker for DSBs. We observed that proximal SOBP had the highest number of total foci/cell and lowest survival, while distal SOBP had the most dense tracks. Both NHEJ- and HR-deficient CHO cells portrayed an increase in radiosensitivity throughout the full carbon beam range, although NHEJ-deficient cells were the most radiosensitive cell line from beam entrance up to proximal SOBP and demonstrated a dose-dependent decrease in ability to repair DSBs. In contrast, HR-deficient cells had the greatest ratio of survival fraction at entrance depth to the lowest survival fraction within the SOBP and demonstrated a linear energy transfer (LET)-dependent decrease in ability to repair DSBs. Collectively, our results provide insight into treatment planning and potential targets to inhibit, as HR was a more beneficial pathway to inhibit than NHEJ to enhance the cell killing effect of CIRT in targeted tumor cells within the SOBP while maintaining limited unwanted damage to surrounding healthy cells.


Assuntos
Quebras de DNA de Cadeia Dupla , Reparo do DNA , Cricetinae , Animais , Humanos , Cricetulus , Células CHO , DNA , Carbono , Reparo do DNA por Junção de Extremidades
6.
Pediatr Res ; 94(1): 268-274, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-36539574

RESUMO

BACKGROUND: The effect of recombinant human GH (rhGH) in Chinese children with chronic kidney disease (CKD) is unclear. METHODS: This was a 52-week, multicenter, randomized, open-label, negative-controlled phase 3 study. Prepubertal subjects were randomized 1:1 to either daily subcutaneous injections of rhGH 0.05 mg/kg/day or no treatment for 52 weeks. RESULTS: A total of 68 subjects with a mean age of 7.8 ± 3.27 years were enrolled. At week 52, the height standard deviation score (HT-SDS) in the treated group increased by 0.75 ± 0.58, which was significantly higher compared with 0.17 ± 0.47 in the untreated group (least squares mean 0.58, 95% confidence interval, 0.32-0.84; P < 0.001). At week 52, significant improvements were observed in other growth parameters (height velocity [P < 0.001]), insulin-like growth factor 1 (IGF-1) SDS [P < 0.001], IFG-1/insulin-like growth factor binding protein-3 molar ratio [P < 0.001], and height [P < 0.001]) compared with the untreated control. Seven patients reported treatment-related adverse events (TRAEs) and most TRAEs were mild in severity. Most subjects recovered without further intervention. CONCLUSIONS: Daily rhGH for 52 weeks in children with CKD-induced growth retardation significantly improved HT-SDS and other growth parameters without compromising safety. IMPACT: The efficacy and safety of growth hormone (GH) therapy in Chinese children with chronic kidney disease (CKD) are unclear. This study found that giving short stature Chinese children with CKD daily recombinant human growth hormone (rhGH) for 52 weeks improved growth parameters without compromising safety. This study's information can give physicians the confidence to treat these patients in their clinical practice.


Assuntos
Hormônio do Crescimento Humano , Insuficiência Renal Crônica , Humanos , Criança , Pré-Escolar , População do Leste Asiático , Transtornos do Crescimento/tratamento farmacológico , Hormônio do Crescimento Humano/uso terapêutico , Hormônio do Crescimento Humano/farmacologia , Hormônio do Crescimento/farmacologia , Insuficiência Renal Crônica/tratamento farmacológico , Fator de Crescimento Insulin-Like I/metabolismo , Proteínas Recombinantes/uso terapêutico , Proteínas Recombinantes/farmacologia , Estatura
7.
J Med Genet ; 59(2): 147-154, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-33323469

RESUMO

BACKGROUND: Nephronophthisis-related ciliopathies (NPHP-RC) account for the majority of cases of monogenetically caused end-stage renal disease (ESRD) in children. Exploring the correlation between the phenotype and genotype of NPHP-RC is helpful for early diagnosis and management. We investigated the phenotype and genotype spectra of NPHP-RC in a Chinese multicentre cohort. METHODS: Crosss-ectional and longitudinal data of 60 patients from 57 families with pathogenic NPHP-RC gene mutations distributed in 22 regions of China were collected into a unified, anonymous database. The mean observation time of this cohort was 3.5±3.1 years. RESULTS: Mutations in NPHP1 and NPHP3 were the most common genetic defects. Overall, 45% of patients presented with isolated nephronophthisis (NPH), and 55% exhibited the extrarenal phenotype, which frequently involved the liver (41.7%, n=25), central nervous system (26.7%, n=16), eyes (26.7%, n=16) and skeletal system (11.7%, n=7). Accidental detection of elevated serum creatinine and non-specific symptoms caused by chronic kidney disease occurred in 65% of patients. Patients carrying NPHP1 mutations mainly presented with isolated NPH (90%, 18/20) and progressed to ESRD at a mean age of 12.9±0.5 years. The mean age of ESRD onset in the non-NPHP1 group was lower than that in the NPHP1 group (6.2±1.4 years, p<0.001), especially for patients carrying NPHP3 mutations (3.1±1.2 years), showing a heterogeneous phenotype characterised by Bardet-Biedl syndrome (12.5%, n=5), Joubert syndrome (7.5%, n=3), COACH syndrome (2.5%, n=1), Mainzer-Saldino syndrome (2.5%, n=1), short-rib thoracic dysplasia (2.5%, n=1) and unclassified symptoms (32.5%, n=13). CONCLUSIONS: The Chinese Children Genetic Kidney Disease Database registry characterised the spectrum of the phenotype and genotype of NPHP-RC in the Chinese population. NPHP1 and NPHP3 were the most common pathogenic genes. Rapid progression to ESRD and liver involvement were noted in patients with NPHP3 mutations.


Assuntos
Ciliopatias/genética , Doenças Renais Císticas/congênito , Povo Asiático , Criança , Estudos de Coortes , Análise Mutacional de DNA , Feminino , Estudos de Associação Genética , Genótipo , Humanos , Doenças Renais Císticas/genética , Falência Renal Crônica/genética , Masculino , Mutação , Fenótipo , Estudos Prospectivos
8.
BMC Pediatr ; 23(1): 407, 2023 08 18.
Artigo em Inglês | MEDLINE | ID: mdl-37596520

RESUMO

BACKGROUND: WDR35 variants are known to cause a rare autosomal recessive disorder-Cranioectodermal dysplasia (CED). The CED patients are commonly present with facial dysmorphisms (frontal bossing and low-set ears), sagittal craniosynostosis, growth retardation, dolichocephaly, skeletal deformities (brachydactyly, terminal hypoplasia of the fingers and narrow thorax), ectodermal abnormalities (sparse hair, and finger/toe nail dysplasia), nephronophthisis, retinal dystrophy and hepatic fibrosis. Diagnosis of CED can be difficult because it presents with high genetic heterogeneity. However, our understanding of the phenotype of CED caused by WDR35 variants could be more explicit, and the correlation between genotype and phenotype needs further improvement. CASE PRESENTATION: We report a case of the first Chinses patient of CED caused by WDR35 variants, a 3-year-and-3-month-old patient, who was admitted to our hospital with frontal bossing, growth retardation, low set ears, dolichocephaly, sparse hair, and small limbs, abnormal renal function, and moderate anemia. The child showed a novel phenotype of the ectopic testis except for presenting typical CED characteristics, and he was identified with novel compound heterozygous WDR35 variants (c.2590 C > T, p.Gln864* and c.2408_2416del, p.Asn803_Ala805del; NM_001006657). He was given iron succinate and erythropoietin to improve anemia and to inhibit repeated metabolic acidosis and hyperkalemia through acid correction, diuretic, and potassium-lowering treatments. The parents refused to accept renal replacement therapy for their child and were discharged voluntarily. CONCLUSIONS: This is the first reported case of the WDR35 variants that can lead to CED and ectopic testis, which is also the first Chinese patient associated with WDR35 variants. This study expands our understanding of genotype-phenotype association in patients with WDR35 variants and provides genetic counseling for prevention and intervention in this genetic disorder. Neonatal carriers should be followed up for kidney and CED-related diseases to detect warning signs.


Assuntos
Craniossinostoses , Criptorquidismo , Humanos , Masculino , Proteínas do Citoesqueleto , População do Leste Asiático , Transtornos do Crescimento , Peptídeos e Proteínas de Sinalização Intracelular , Pré-Escolar
9.
Zhongguo Dang Dai Er Ke Za Zhi ; 25(7): 732-738, 2023 Jul 15.
Artigo em Zh | MEDLINE | ID: mdl-37529956

RESUMO

OBJECTIVES: To investigate the genotypes of the pathogenic gene COL4A5 and the characteristics of clinical phenotypes in children with Alport syndrome (AS). METHODS: A retrospective analysis was performed for the genetic testing results and clinical data of 19 AS children with COL4A5 gene mutations. RESULTS: Among the 19 children with AS caused by COL4A5 gene mutations, 1 (5%) carried a new mutation of the COL4A5 gene, i.e., c.3372A>G(p.P1124=) and presented with AS coexisting with IgA vasculitis nephritis; 3 children (16%) had large fragment deletion of the COL4A5 gene, among whom 2 children (case 7 had a new mutation site of loss51-53) had gross hematuria and albuminuria at the onset, and 1 child (case 13 had a new mutation site of loss3-53) only had microscopic hematuria, while the other 15 children (79%) had common clinical phenotypes of AS, among whom 7 carried new mutations of the COL4A5 gene. Among all 19 children, 3 children (16%) who carried COL4A5 gene mutations also had COL4A4 gene mutations, and 1 child (5%) had COL4A3 gene mutations. Among these children with double gene mutations, 2 had gross hematuria and proteinuria at the onset. CONCLUSIONS: This study expands the genotype and phenotype spectrums of the pathogenic gene COL4A5 for AS. Children with large fragment deletion of the COL4A5 gene or double gene mutations of COL4A5 with COL4A3 or COL4A4 tend to have more serious clinical manifestations.


Assuntos
Nefrite Hereditária , Humanos , Nefrite Hereditária/genética , Nefrite Hereditária/complicações , Nefrite Hereditária/patologia , Hematúria/genética , Hematúria/complicações , Estudos Retrospectivos , Colágeno Tipo IV/genética , Genótipo , Mutação
10.
Kidney Int ; 102(3): 604-612, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35643375

RESUMO

Primary Coenzyme Q10 (CoQ10) deficiency is an ultra-rare disorder caused by defects in genes involved in CoQ10 biosynthesis leading to multidrug-resistant nephrotic syndrome as the hallmark kidney manifestation. Promising early results have been reported anecdotally with oral CoQ10 supplementation. However, the long-term efficacy and optimal prescription remain to be established. In a global effort, we collected and analyzed information from 116 patients who received CoQ10 supplements for primary CoQ10 deficiency due to biallelic pathogenic variants in either the COQ2, COQ6 or COQ8B genes. Median duration of follow up on treatment was two years. The effect of treatment on proteinuria was assessed, and kidney survival was analyzed in 41 patients younger than 18 years with chronic kidney disease stage 1-4 at the start of treatment compared with that of an untreated cohort matched by genotype, age, kidney function, and proteinuria. CoQ10 supplementation was associated with a substantial and significant sustained reduction of proteinuria by 88% at 12 months. Complete remission of proteinuria was more frequently observed in COQ6 disease. CoQ10 supplementation led to significantly better preservation of kidney function (5-year kidney failure-free survival 62% vs. 19%) with an improvement in general condition and neurological manifestations. Side effects of treatment were uncommon and mild. Thus, our findings indicate that all patients diagnosed with primary CoQ10 deficiency should receive early and life-long CoQ10 supplementation to decelerate the progression of kidney disease and prevent further damage to other organs.


Assuntos
Doenças Mitocondriais , Síndrome Nefrótica , Ubiquinona , Ataxia/tratamento farmacológico , Suplementos Nutricionais , Humanos , Rim/patologia , Doenças Mitocondriais/tratamento farmacológico , Debilidade Muscular/tratamento farmacológico , Mutação , Síndrome Nefrótica/complicações , Síndrome Nefrótica/tratamento farmacológico , Síndrome Nefrótica/genética , Proteinúria/diagnóstico , Proteinúria/tratamento farmacológico , Esteroides/uso terapêutico , Ubiquinona/análogos & derivados , Ubiquinona/deficiência , Ubiquinona/uso terapêutico
11.
J Clin Immunol ; 42(8): 1672-1684, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-35849269

RESUMO

PURPOSE: CD81 deficiency is an extremely rare primary immunodeficiency disease characterized by severe and recurrent infections, IgA-related nephropathy, and profound hypogammaglobulinemia. Only one patient has been reported so far, and the pathogenesis remains unclear. Here, we identified a new case of CD81 deficiency and described its pathogenesis. METHODS: We analyzed the clinical, genetic, and immunological features of the patient with CD81 deficiency, and explored the pathogenesis of her antibody deficiencies. RESULTS: The major manifestation of this patient was unexpectedly not recurrent infections but IgA nephropathy with aberrant serum galactose-deficient IgA1. Whole-exome sequencing revealed novel biallelic mutations in CD81 gene that abolished the surface expression of CD81. B cells from the patient lack membrane CD19 and showed reduced switched memory B cells and transitional B cells. Decreased expression of key molecules pY and pBTK in BCR signaling were demonstrated by confocal microscopy. RNA sequencing revealed that genes associated with BCR signaling and immunoglobulins were downregulated in CD81-deficient B cells. In addition, the patient showed increased frequency of T follicular helper cells that biased to Th1-like subsets. CONCLUSION: We reported the second patient with CD81 deficiency in the world and illustrated aberrant BCR signaling in the patient, therefore helping to unravel the mechanism of antibody deficiency in CD81-deficient patients.


Assuntos
Glomerulonefrite por IGA , Tetraspanina 28 , Feminino , Humanos , Antígenos CD19/metabolismo , Linfócitos B , China , Glomerulonefrite por IGA/diagnóstico , Glomerulonefrite por IGA/genética , Glomerulonefrite por IGA/metabolismo , Imunoglobulina A/genética , Mutação , Tetraspanina 28/genética
12.
Artigo em Inglês | MEDLINE | ID: mdl-36549658

RESUMO

BACKGROUND: Congenital anomalies of the kidney and urinary tracts (CAKUT) are the leading cause of kidney failure in children with phenotypic and genotypic heterogeneity. Our objective was to describe the genetic spectrum and identify the risk factors for kidney failure in children with CAKUT. METHODS: Clinical and genetic data were derived from a multicenter network (Chinese Children Genetic Kidney Disease Database, CCGKDD) and the Chigene database. A total of 925 children with CAKUT who underwent genetic testing from 2014 to 2020 across China were studied. Data for a total of 584 children wereobtained from the CCGKDD, including longitudinal data regarding kidney function. The risk factors for kidney failure were determined by the Kaplan-Meier method and Cox proportional hazards models. RESULTS: A genetic diagnosis was established in 96 out of 925 (10.3%) children, including 72 (8%) with monogenic variants, 20 (2%) with copy number variants (CNVs), and 4 (0.4%)with major chromosomal anomalies. Patients with skeletal abnormalities were more likely to have large CNVs or abnormal karyotypes than monogenic variants. Eighty-two patients from the CCGKDD progressed to kidney failure at a median age of 13.0 (95% confidence interval, 12.4-13.6) years, and twenty-four were genetically diagnosed with variants of PAX2, TNXB, EYA1, HNF1B and GATA3 or the 48, XXYY karyotype. The multivariate analysis indicated that solitary kidney, posterior urethral valves, bilateral hypodysplasia, the presence of certain variants and premature birth were independent prognostic factors. CONCLUSIONS: The genetic spectrum of CAKUT varies among different subphenotypes. The identified factors indicate areas that require special attention.

13.
J Appl Toxicol ; 42(10): 1688-1700, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-35560222

RESUMO

The antiviral drug remdesivir has been used to treat the growing number of coronavirus disease 2019 (COVID-19) patients. However, the drug is mainly excreted through urine and feces and introduced into the environment to affect non-target organisms, including fish, which has raised concerns about potential ecotoxicological effects on aquatic organisms. Moreover, studies on the ecological impacts of remdesivir on aquatic environments have not been reported. Here, we aimed to explore the toxicological impacts of microinjection of remdesivir on zebrafish early embryonic development and larvae and the associated mechanism. We found that 100 µM remdesivir delayed epiboly and impaired convergent movement of embryos during gastrulation, and dose-dependent increases in mortality and malformation were observed in remdesivir-treated embryos. Moreover, 10-100 µM remdesivir decreased blood flow and swimming velocity and altered the behavior of larvae. In terms of molecular mechanisms, 80 differentially expressed genes (DEGs) were identified by transcriptome analysis in the remdesivir-treated group. Some of these DEGs, such as manf, kif3a, hnf1ba, rgn, prkcz, egr1, fosab, nr4a1, and ptgs2b, were mainly involved in early embryonic development, neuronal developmental disorders, vascular disease and the blood flow pathway. These data reveal that remdesivir can impair early embryonic development, blood flow and behavior of zebrafish embryos/larvae, probably due to alterations at the transcriptome level. This study suggests that it is important to avoid the discharge of remdesivir to aquatic ecosystems and provides a theoretical foundation to hinder remdesivir-induced ecotoxicity to aquatic environments.


Assuntos
Tratamento Farmacológico da COVID-19 , Poluentes Químicos da Água , Monofosfato de Adenosina/análogos & derivados , Alanina/análogos & derivados , Animais , Ecossistema , Embrião não Mamífero , Fator 1-beta Nuclear de Hepatócito/metabolismo , Fator 1-beta Nuclear de Hepatócito/farmacologia , Larva , Poluentes Químicos da Água/metabolismo , Poluentes Químicos da Água/toxicidade , Peixe-Zebra , Proteínas de Peixe-Zebra/metabolismo
14.
Int J Mol Sci ; 22(13)2021 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-34203224

RESUMO

Previous work pointed to a critical role of excessive production of reactive oxygen species (ROS) in increased radiation hematopoietic death in GFP mice. Meanwhile, enhanced antioxidant capability was not demonstrated in the mouse model of radio-induced adaptive response (RAR) using rescue of radiation hematopoietic death as the endpoint. ROS induction by ex vivo X-irradiation at a dose ranging from 0.1 to 7.5 Gy in the nucleated bone marrow cells was comparatively studied using GFP and wild type (WT) mice. ROS induction was also investigated in the cells collected from mice receiving a priming dose (0.5 Gy) efficient for RAR induction in WT mice. Significantly elevated background and increased induction of ROS in the cells from GFP mice were observed compared to those from WT mice. Markedly lower background and decreased induction of ROS were observed in the cells collected from WT mice but not GFP mice, both receiving the priming dose. GFP overexpression could alter background and induction of ROS by X-irradiation in hematopoietic cells. The results provide a reasonable explanation to the previous study on the fate of cells and mice after X-irradiation and confirm enhanced antioxidant capability in RAR. Investigations involving GFP overexpression should be carefully interpreted.


Assuntos
Células da Medula Óssea/metabolismo , Células da Medula Óssea/efeitos da radiação , Células-Tronco Hematopoéticas/metabolismo , Células-Tronco Hematopoéticas/efeitos da radiação , Espécies Reativas de Oxigênio/metabolismo , Raios X/efeitos adversos , Animais , Relação Dose-Resposta à Radiação , Feminino , Camundongos , Camundongos Endogâmicos C57BL
15.
Pediatr Nephrol ; 35(11): 2163-2171, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32529322

RESUMO

BACKGROUND: In mainland China, dialysis for children with end-stage renal disease (ESRD) was not introduced until the 1980s. To describe the development of pediatric dialysis in different regions of China, a national pediatric dialysis network, namely, International Pediatric Dialysis Network-China (IPDN-China) ( www.pedpd.org.cn ), was launched in 2012. METHODS: Original and updated information from the renal centers registered with the IPDN-China was collected between 2012 and 2016 from two sources, namely, the registry and the survey, and demographic features were analyzed. RESULTS: Due to promotion by the IPDN-China, the number of registered renal centers increased from 12 to 39 between 2012 and 2016, with a significant increase in the coverage of the Chinese administrative divisions (from 26.5 to 67.6%) (p < 0.01); and the coverage of the pediatric (0~14 years old) population increased to nearly 90% in 2016. The distribution of renal centers indicated that East China had the highest average number of registered centers per million population (pmp) 0~14-year-old age group. Seventeen relatively large dialysis centers were distributed across 14 divisions. Various modalities of renal replacement therapy (RRT) were available in most centers. The IPDN-China has promoted collaborations between dieticians, psychologists, and social workers on dialysis teams to provide better service to children with ESRD and their families. The proportion of centers with all three types of paramedic support (i.e., dieticians, psychologists, and social workers) as well as the proportion of centers with a partial paramedic team significantly increased between 2012 (25.0%) and 2016 (69.2%) (p < 0.05). In terms of the point prevalent cases of patients (aged < 18 years), data from the survey of 39 registered centers revealed that the number of children with ESRD who were on RRT was 578 (49% received a kidney transplant) at the end of 2016, which was more than that reported in previous surveys. Data from the registry showed that 349 dialysis patients had been enrolled as of the end of 2016. The median age at RRT start was 9.5 years, and the leading cause of ESRD was congenital abnormalities of the kidney and urinary tract (CAKUT). CONCLUSIONS: The IPDN-China has helped to promote the development of pediatric dialysis for ESRD in China by improving the organization of care for dialysis patients and increasing the availability and the quality of RRT for patients who need it. To improve knowledge about the epidemiology and outcomes of pediatric RRT around the country, a sustained effort needs to be made by the IPDN-China to increase the enrollment of dialysis patients and increase the number of registered centers in the future.


Assuntos
Instituições de Assistência Ambulatorial/estatística & dados numéricos , Diálise Renal/estatística & dados numéricos , Adolescente , Criança , Pré-Escolar , China , Feminino , Acessibilidade aos Serviços de Saúde/organização & administração , Humanos , Lactente , Recém-Nascido , Masculino , Sistema de Registros
16.
J Phycol ; 56(3): 687-698, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-31975508

RESUMO

Dunaliella salina is well known for its ability to accumulate large amounts of ß-carotene. Myo-inositol (MI) enhances the biomass production of D. salina, but the underlying mechanisms were unclear. The present study showed that the concentration of exogenous MI decreased gradually and reached a constant level at the 4th day of cultivation. MI enhanced the contents of total colored carotenoids and the activity of photosystem II. Metabolic profiles were significantly changed after the addition of exogenous MI, as revealed by multivariate statistical analysis. The metabolites could be categorized into four groups based on the relative levels in different samples. Exogenous MI increased the levels of most detected sugars, amino acids, and total saturated and unsaturated fatty acids. Based on the physiological and metabolic analyses, a hypothetical growth-promoting model that MI promotes the growth of D. salina TG by increasing the levels of key metabolites and possibly enhancing photosynthesis, was proposed. This study provides valuable information for understanding the growth-promoting mechanisms of MI in D. salina from the metabolic perspective.


Assuntos
Clorofíceas , Clorófitas , Carotenoides , Inositol , beta Caroteno
17.
Clin Genet ; 96(5): 402-410, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31328266

RESUMO

To explore the approaches and diagnostic yield of genetic testing for renal disease in children, we describe the genotype and phenotype of the national cohort of children with renal disease from 13 different regions of China recruited from 2014 to 2018 by building up the multicenter registration system (Chinese Children Genetic Kidney Disease Database, CCGKDD). Genetic diagnosis was confirmed in 42.1% of our cohort of 1001 pediatric patients with clinical suspicion of a genetic renal disease. Of the 106 distinct monogenetic disorders detected, 15 accounted for 60.7% of genetic diagnoses. The diagnostic yield was 29.1% in steroid resistant nephritic syndrome (SRNS), 61.4% in cystic renal disease, 17.0% in congenital anomalies of the kidney and urinary tract (CAKUT), 62.3% in renal tubular disease/renal calcinosis, and 23.9% for chronic kidney disease (CKD) 3 to 5 stage with unknown origin. Genetic approaches of target gene sequence (TGS), singleton whole-exome sequencing (WES) and trio-WES were performed with diagnostic rates of 44.8%, 36.2%, and 42.6%, respectively. The early use of trio-WES could improve the diagnostic rate especially in renal tubular disease and calcinosis. We report the genetic spectrum of Chinese children with renal disease. Establishment of the CCGKDD will improve the genetic work on renal disease.


Assuntos
Exoma/genética , Predisposição Genética para Doença , Doenças Renais Císticas/genética , Insuficiência Renal Crônica/genética , Criança , Pré-Escolar , China/epidemiologia , Estudos de Coortes , Feminino , Testes Genéticos , Humanos , Rim/metabolismo , Rim/patologia , Doenças Renais Císticas/diagnóstico , Doenças Renais Císticas/patologia , Masculino , Fenótipo , Insuficiência Renal Crônica/diagnóstico , Insuficiência Renal Crônica/patologia , Sistema Urinário/metabolismo , Sistema Urinário/patologia , Sequenciamento do Exoma
18.
Mar Drugs ; 17(5)2019 May 02.
Artigo em Inglês | MEDLINE | ID: mdl-31052556

RESUMO

Six new diketopiperazines, (±)-7,8-epoxy-brevianamide Q ((±)-1), (±)-8-hydroxy-brevianamide R ((±)-2), and (±)-8-epihydroxy-brevianamide R ((±)-3), together with four known compounds, (±)-brevianamide R ((±)-4), versicolorin B (5) and averufin (6), were isolated from a marine-derived fungus strain Aspergillus versicolor MF180151, which was recovered from a sediment sample collected from the Bohai Sea, China. The chemical structures were established by 1D- and 2D-NMR spectra and HR-ESI-MS. 1 is the first sample of brevianamides with an epoxy moiety. Their bioactivities were evaluated against Candida albicans, Bacillus subtilis, Staphylococcus aureus, methicillin-resistant S. aureus, Pseudomonas aeruginosa, and Bacillus Calmette-Guérin. Compounds 1-4 showed no activities against the pathogens, and compounds 5 and 6 showed moderate activities against S. aureus and methicillin-resistant S. aureus.


Assuntos
Anti-Infecciosos/química , Anti-Infecciosos/farmacologia , Aspergillus/química , Dicetopiperazinas/química , Dicetopiperazinas/farmacologia , Anti-Infecciosos/isolamento & purificação , Bacillus subtilis/efeitos dos fármacos , Candida albicans/efeitos dos fármacos , China , Dicetopiperazinas/isolamento & purificação , Testes de Sensibilidade Microbiana , Estrutura Molecular , Pseudomonas aeruginosa/efeitos dos fármacos , Staphylococcus aureus/efeitos dos fármacos
19.
Proc Natl Acad Sci U S A ; 113(48): 13869-13874, 2016 11 29.
Artigo em Inglês | MEDLINE | ID: mdl-27834729

RESUMO

The anchorless fibronectin-binding proteins (FnBPs) are a group of important virulence factors for which the structures are not available and the functions are not well defined. In this study we performed comprehensive studies on a prototypic member of this group: the fibronectin-/fibrinogen-binding protein from Streptococcus suis (FBPS). The structures of the N- and C-terminal halves (FBPS-N and FBPS-C), which together cover the full-length protein in sequence, were solved at a resolution of 2.1 and 2.6 Å, respectively, and each was found to be composed of two domains with unique folds. Furthermore, we have elucidated the organization of these domains by small-angle X-ray scattering. We further showed that the fibronectin-binding site is located in FBPS-C and that FBPS promotes the adherence of S suis to host cells by attaching the bacteria via FBPS-N. Finally, we demonstrated that FBPS functions both as an adhesin, promoting S suis attachment to host cells, and as a bacterial factor, activating signaling pathways via ß1 integrin receptors to induce chemokine production.


Assuntos
Adesinas Bacterianas/química , Infecções Estreptocócicas/genética , Streptococcus suis/química , Fatores de Virulência/química , Adesinas Bacterianas/genética , Sequência de Aminoácidos , Sítios de Ligação , Cristalografia por Raios X , Fibronectinas/genética , Fibronectinas/metabolismo , Humanos , Infecções Estreptocócicas/microbiologia , Streptococcus suis/genética , Streptococcus suis/patogenicidade , Fatores de Virulência/genética
20.
Molecules ; 24(19)2019 Sep 23.
Artigo em Inglês | MEDLINE | ID: mdl-31547628

RESUMO

In citrus color mutants, the levels of carotenoid constituents and other secondary metabolites are different in their corresponding wild types. Terpenoids are closely related to coloration, bitterness, and flavor. In this study, terpenoid profiles and hormones in citrus fruits of two red-flesh mutants-Red Anliu orange and Red-flesh Guanxi pummelo-and their corresponding wild types were investigated using GC/MS, HPLC, and LC-MS/MS. Results showed that Red Anliu orange (high in carotenoids) and Anliu orange (low in carotenoids) accumulated low levels of limonoid aglycones but high levels of monoterpenoids; conversely, Red-flesh Guanxi pummelo (high in carotenoids) and Guanxi pummelo (deficient in carotenoids) accumulated high levels of limonoid aglycones but low levels of monoterpenoids. However, isopentenyl diphosphate was present at similar levels. A correlation analysis indicated that jasmonic and salicylic acids might play important roles in regulating terpenoid biosynthesis. Additionally, the similarities of carotenoid and volatile profiles between each mutant and its corresponding wild type were greater than those between the two mutants or the two wild types. The flux balance of terpenoid metabolism in citrus fruit tends toward stability among various citrus genera that have different terpenoid profiles. Bud mutations could influence metabolite profiles of citrus fruit to a limited extent.


Assuntos
Citrus/química , Frutas/química , Odorantes/análise , Terpenos/química , Cromatografia Líquida de Alta Pressão , Cromatografia Líquida , Cromatografia Gasosa-Espectrometria de Massas , Hemiterpenos/química , Monoterpenos/química , Compostos Organofosforados/química , Extratos Vegetais/química , Espectrometria de Massas em Tandem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA