RESUMEN
OBJECTIVES@#To investigate the clinical application of metagenomic next-generation sequencing (mNGS) of bronchoalveolar lavage fluid (BALF) in the etiological diagnosis and treatment of refractory pneumonia (RTP) in children.@*METHODS@#A retrospective analysis was performed on 160 children with RTP who were admitted to the Department of Pediatric Internal Medicine, Maternal and Child Health Hospital of Inner Mongolia Autonomous Region, from January 2020 to March 2023. According to whether mNGS was performed, they were divided into two groups: mNGS (n=80) and traditional testing (n=80). All children received the tests of inflammatory markers and pathogen tests after admission. Traditional pathogenicity tests included microbial culture (sputum specimen collected by suction tube), nucleic acid detection of respiratory pathogens, and serological test (mycoplasma, tuberculosis, and fungi). For the mNGS group, BALF specimens were collected after bronchoscopy and were sent to the laboratory for mNGS and microbial culture. The two groups were analyzed and compared in terms of the detection of pathogens and treatment.@*RESULTS@#Compared with the traditional testing group, the mNGS group had a significantly higher detection rate of pathogens (92% vs 58%, P<0.05), with more types of pathogens and a higher diagnostic rate of mixed infections. Compared with the traditional testing group, the mNGS group had a significantly higher treatment response rate and a significantly lower incidence rate of complications during hospitalization (P<0.05). Treatment was adjusted for 68 children in the mNGS group according to the results of mNGS, with a treatment response rate of 96% (65/68) after adjustment.@*CONCLUSIONS@#Compared with traditional pathogen tests, BALF mNGS can significantly improve the detection rate of pathogens and find some rare pathogens. In clinical practice, when encountering bottlenecks during the diagnosis and treatment of children with RTP, it is advisable to promptly perform the mNGS to identify the pathogens.
Asunto(s)
Humanos , Niño , Líquido del Lavado Bronquioalveolar , Estudios Retrospectivos , Neumonía/terapia , Secuenciación de Nucleótidos de Alto Rendimiento , Broncoscopía , Sensibilidad y EspecificidadRESUMEN
<p><b>Background</b>The worsening of semen quality, due to the application of Wi-Fi, can be ameliorated by Vitamin E. This study aimed to demonstrate whether a moderate dose of trolox, a new Vitamin E, inhibits oxidative damage on sperms in vitro after exposure to Wi-Fi radiation.</p><p><b>Methods</b>Each of the twenty qualified semen, gathered from June to October 2014 in eugenics clinic, was separated into four aliquots, including sham, Wi-Fi-exposed, Wi-Fi plus 5 mmol/L trolox, and Wi-Fi plus 10 mmol/L trolox groups. At 0 min, all baseline parameters of the 20 samples were measured in sequence. Reactive oxygen species, glutathione, and superoxide dismutase were evaluated in the four aliquots at 45 and 90 min, as were sperm DNA fragments, sperm mitochondrial potential, relative amplification of sperm mitochondrial DNA, sperm vitality, and progressive and immotility sperm. The parameters were analyzed by one-way analysis of variance and Tukey's posttest.</p><p><b>Results</b>Among Wi-Fi plus 5 mmol/L trolox, Wi-Fi-exposed and Wi-Fi plus 10 mmol/L trolox groups, reactive oxygen species levels (45 min: 3.80 ± 0.41 RLU·10·mlvs. 7.50 ± 0.35 RLU·10·mlvs. 6.70 ± 0.47 RLU·10·ml, P < 0.001; 90 min: 5.40 ± 0.21 RLU·10·mlvs. 10.10 ± 0.31 RLU·10·mlvs. 7.00 ± 0.42 RLU·10·ml, P < 0.001, respectively), percentages of tail DNA (45 min: 16.8 ± 2.0% vs. 31.9 ± 2.5% vs. 61.3 ± 1.6%, P < 0.001; 90 min: 19.7 ± 1.5% vs. 73.7 ± 1.3% vs. 73.1 ± 1.1%, P < 0.001, respectively), 8-hydroxy-2'-deoxyguanosine (45 min: 51.89 ± 1.46 pg/ml vs. 104.89 ± 2.19 pg/ml vs. 106.11 ± 1.81 pg/ml , P = 0.012; 90 min: 79.96 ± 1.73 pg/ml vs. 141.73 ± 2.90 pg/ml vs. 139.06 ± 2.79 pg/ml; P < 0.001), and percentages of immotility sperm (45 min: 27.7 ± 2.7% vs. 41.7 ± 2.2% vs. 41.7 ± 2.5%; 90 min: 29.9 ± 3.3% vs. 58.9 ± 4.0% vs. 63.1 ± 4.0%; all P < 0.001) were lowest, and glutathione peroxidase (45 min: 60.50 ± 1.54 U/ml vs. 37.09 ± 1.77 U/ml vs. 28.18 ± 1.06 U/ml; 90 min: 44.61 ± 1.23 U/ml vs. 16.86 ± 0.93 U/ml vs. 29.94 ± 1.56 U/ml; all P < 0.001), percentages of head DNA (45 min: 83.2 ± 2.0% vs. 68.2 ± 2.5% vs. 38.8 ± 1.6%; 90 min: 80.3 ± 1.5% vs. 26.3 ± 1.3% vs. 26.9 ± 1.1%; all P < 0.001), percentages of sperm vitality (45 min: 89.5 ± 1.6% vs. 70.7 ± 3.1% vs. 57.7 ± 2.4%; 90 min: 80.8 ± 2.2% vs. 40.4 ± 4.0% vs. 34.7 ± 3.9%; all P < 0.001), and progressive sperm (45 min: 69.3 ± 2.7% vs. 55.8 ± 2.2% vs. 55.4 ± 2.5%; 90 min: 67.2 ± 3.3% vs. 38.2 ± 4.0% vs. 33.9 ± 4.0%; all P < 0.001) were highest in Wi-Fi plus 5 mmol/L trolox group at 45 and 90 min, respectively. Other parameters were not affected, while the sham group maintained the baseline.</p><p><b>Conclusion</b>This study found that 5 mmol/L trolox protected the Wi-Fi-exposed semen in vitro from the damage of electromagnetic radiation-induced oxidative stress.</p>
RESUMEN
<p><b>OBJECTIVE</b>To evaluate the association between single nucleotide polymorphisms (SNPs) of cytotoxic T-lymphocyte-associated protein 4 (CTLA4) gene and susceptibility to cervical cancer.</p><p><b>METHODS</b>One hundred patients and 100 healthy controls from Hubei province were genotyped for 20 polymorphic loci using Sequenom.</p><p><b>RESULTS</b>The frequency of rs11571316 G allele and rs5742909 T allele, which are localized in the promoter region, and rs11571319 A allele, which is downstream of the gene, were significantly higher in patients than in controls. Luciferase assay showed that, as the previously reported rs5742909 T allele, rs11571316 G allele could significantly increase the expression of the reporter gene.</p><p><b>CONCLUSION</b>SNPs in the promoter region of (CTLA4) gene might increase the susceptibility to cervical cancer by increasing (CTLA4) gene expression.</p>
Asunto(s)
Adulto , Anciano , Femenino , Humanos , Persona de Mediana Edad , Adulto Joven , Alelos , Antígenos CD , Genética , Antígeno CTLA-4 , Estudios de Casos y Controles , Regulación Neoplásica de la Expresión Génica , Genética , Predisposición Genética a la Enfermedad , Genotipo , Polimorfismo de Nucleótido Simple , Neoplasias del Cuello Uterino , GenéticaRESUMEN
<p><b>OBJECTIVE</b>To investigate the application value of the multiplex ligation-dependent probe amplification (MLPA) technique in diagnosis and prenatal diagnosis of chromosomes 13, 18, 21, X and Y aneuploidy.</p><p><b>METHODS</b>Forty-four cases including 30 peripheral blood samples, 10 fetal cord blood samples, and 4 amniotic fluid samples were collected in this study. DNA was isolated from the samples and detected by MLPA, followed by analyzing in ABI310 Genetic Analyzer. Analysis of copy number changes for chromosomes 13, 18, 21, X and Y was carried out with RH-MLPA-analysis software. The routine karyotype analyses were also done for all the samples.</p><p><b>RESULTS</b>Of 44 samples, the results of 42 by MLPA method was consistent with that by chromosome karyotyping. Only one case with trisomy 21 chimerism was failed to reach conclusion. In addition, one case of mark chromosome segment was identified as Y-chromosome segment by MLPA, while karyotyping failed to make judgment. The accurate rate of MLPA was 97.7% (43/44).</p><p><b>CONCLUSION</b>The MLPA technique can simultaneously detect dozens of different target sequences and their copy number changes in a single reaction. It showed high specificity, good reproducibility, was fast and high-throughput. The MLPA technique can be applied to diagnosis and prenatal diagnosis of the common chromosomal aneuploidy.</p>
Asunto(s)
Femenino , Humanos , Embarazo , Líquido Amniótico , Química , Aneuploidia , Cromosomas Humanos Par 13 , ADN , Genética , Variaciones en el Número de Copia de ADN , Síndrome de Down , Diagnóstico , Genética , Sangre Fetal , Química , Técnicas de Amplificación de Ácido Nucleico , Métodos , Diagnóstico Prenatal , Métodos , Sensibilidad y EspecificidadRESUMEN
<p><b>OBJECTIVE</b>To establish a comprehensive and simple assay using denaturing high performance liquid chromatography (DHPLC) for the diagnosis of most common mutations and deletions of α-thalassemia gene in Southeast Asians and Southern Chinese.</p><p><b>METHODS</b>This assay has included a duplex polymerase chain reaction (PCR) followed by DHPLC analysis. An improved PCR was also performed followed by DHPLC analysis. With this assay, a blinded study of 160 samples was screened for three common mutations and three common deletions.</p><p><b>RESULTS</b>The duplex PCR-DHPLC combined with the improved PCR-DHPLC analysis has detected all mutations and the wild-type allele. The results were consistent with those by the original methods.</p><p><b>CONCLUSION</b>This molecular assay may be used for the diagnosis of α-thalassemia patients from this geographical region. The method is accurate, rapid, semi-automatic and cost-effective, which makes it suitable for large-scale screening.</p>
Asunto(s)
Humanos , Cromatografía Líquida de Alta Presión , Métodos , Análisis Mutacional de ADN , Métodos , Orden Génico , Genotipo , Globinas alfa , Genética , Talasemia alfa , Diagnóstico , GenéticaRESUMEN
<p><b>OBJECTIVE</b>The aim of the study was to evaluate the anti-HBs persistence and the long term preventive efficacy after vaccination 23 years with plasma-derived hepatitis B vaccine.</p><p><b>METHODS</b>The study consisted of 261 children who were 5 - 9 years aged, from two primary schools in two townships of Xi'an. 126 children were randomly selected as vaccine group, and 135 children in control group. These children were followed up again in 2009. Excluding self-inoculation, the vaccine and control groups were 81 and 75, who was used to ask to recall details of their experience for vaccination and liver-related illnesses during past twelve years. Individuals who had anti-HBs titers less 10 mIU/ml, HBsAg, anti-HBc and HBV-DNA all were negative, were given a booster dose vaccine and retest for anti-HBs titer after one month.</p><p><b>RESULTS</b>After eliminated the interference of an early booster dose and vaccination outside the study, the positive rate of anti-HBs was 48.1% (39/81) in the vaccine group at year 23, higher than 34.7% (26/75) in control group. At year 23 after primary vaccination, 84.0% (21/25) individuals in the vaccine group whose anti-HBs and anti-HBc both are negative showed a stronger anamnestic response after received a booster dose, while 7.5% (3/40) in the control group. At year 23 after primary vaccination, none clinical case of hepatitis B was found among 194 individuals. However, anti-HBc positive rate in the vaccine group was 16.0% (13/81), while the rate in the control group was 30.7% (23/75) (χ(2) = 4.687, P < 0.05).</p><p><b>CONCLUSION</b>At 23 years after implemented a full course of plasma-derived hepatitis B vaccine, the recipients of vaccine were maintained anti-HBs at a high level or strong immunological memory.</p>
Asunto(s)
Niño , Preescolar , Humanos , Estudios de Seguimiento , Hepatitis B , Alergia e Inmunología , Anticuerpos contra la Hepatitis B , Sangre , Vacunas contra Hepatitis B , Alergia e Inmunología , Inmunización Secundaria , Memoria Inmunológica , Alergia e Inmunología , Plasma , Alergia e InmunologíaRESUMEN
OBJECTIVE: To determining the growth status and medicine quality of test-tube plants of Bupleurum chinense. METHODS: Measuring the field characters of the labeled plants at fixed period after turning green,such as plant height, number of tiller, number of leaves. Using statistical methods to analyse the measured data RESULTS: Each genetic characters standard deviation and relative standard deviation are all smaller at vegetative growth phase, bud forming phase and seed ripening phase. The test-tube plants population of Bupleurum chinense grows consistently. Its uniformity is higher, variability is low. Bupleurum chinense length and weight of root relative standard deviation are all low. The average root length and weight are more predominant than ordinary seed plants. The roots have high content of effective components. Bupleurum chinense population pharmaceutical character is excellent. The medicinal quality is consistent. The number of branch stem and effective fruit bunch is bigger, The seed production is higher. The aerial part yield is large, The economic value of test-tube plants of Bupleurum chinense is higher. The correlation between each characters of test-tube plants of Bupleurum chinense is different from the ordinary seed plants in different growing periods. CONCLUSION: The botanical and pharmacognostic characters of test-tube plants of Bupleurum chinense are excellent.
Asunto(s)
Bupleurum/crecimiento & desarrollo , Bupleurum/genética , Plantas Medicinales/crecimiento & desarrollo , Plantas Medicinales/genética , Técnicas de Cultivo de Tejidos/métodos , Hojas de la Planta/crecimiento & desarrollo , Raíces de Plantas/crecimiento & desarrollo , Tallos de la Planta/crecimiento & desarrolloRESUMEN
<p><b>OBJECTIVE</b>To investigate the effects of experimental left varicocele (ELV) on the vascular endothelial growth factor (VEGF) and its receptor fms-like tyrosine kinase-1 (Flt-1) proteins in the testis and epididymis of adolescent rats, and to find out the correlation of the two proteins with varicocele-induced male infertility.</p><p><b>METHODS</b>We established the ELV model in adolescent male SD rats, and detected the expressions of VEGF and Flt-1 proteins in the testis and epididymis by immunohistochemistry at 2 and 4 weeks after surgery.</p><p><b>RESULTS</b>Cell- and region-specific expressions of VEGF and Flt-1 were observed in the testis and epididymis of the ELV and control groups. Statistical analysis showed that, in comparison with the corresponding control groups, the 2- and 4-week ELV groups exhibited a notable increase in the VEGF protein expression in the hibateral testis and epididymis (P < 0.01, P < 0.05); the Flt-1 expression was obviously upregulated in the hibateral testis and epididymis of the 2-week ELV group (P < 0.01, P < 0.01), but remarkably reduced in the hibateral testis and left epididymis of the 4-week ELV group (P < 0.01, P < 0.05), with no statistic difference in the right epididymis (P > 0.05).</p><p><b>CONCLUSION</b>ELV can cause changes in the expressions of VEGF and Flt-1 proteins in the testis and epididymis of adolescent rats, and consequently affect spermatogenesis and spermiotelcosis, which may be one of the causes of varicocele-induced male infertility or subfertility.</p>
Asunto(s)
Animales , Masculino , Ratas , Modelos Animales de Enfermedad , Epidídimo , Metabolismo , Expresión Génica , Ratas Sprague-Dawley , Testículo , Metabolismo , Varicocele , Metabolismo , Factor A de Crecimiento Endotelial Vascular , Metabolismo , Receptor 1 de Factores de Crecimiento Endotelial Vascular , MetabolismoRESUMEN
<p><b>OBJECTIVE</b>To investigate the difference in the responsiveness of intracellular free Ca2+ concentration ([Ca2+]i) to progesterone in the spermatozoa of normal fertile men and patients with unexplained infertility.</p><p><b>METHODS</b>Nine normal fertile men and 10 patients with unexplained infertility were selected in this study. After swim-up separation of the motile fraction and 2-hour in vitro capacitation, the spermatozoa were loaded with the fluorescent calcium indicator Fluo-3/AM (8.85 micromol/L) for 40 minutes away from the light, and then the sperm suspension was mixed with equal amount of 20% gelatin to immobilize the spermatozoa. The basal intracellular free [Ca2+]i and that induced by 10 micromol/L progesterone in the individual sperm were assessed by laser scanning confocal microscopy.</p><p><b>RESULTS</b>The infertile patients had a significantly lower basal level of [Ca2+]i in the capacitated sperm than the fertile men (P < 0.01). The sperm from the normal controls responded to progesterone by exhibiting a rapid but transient rise in [Ca2+]i, with the peak level significantly higher than the basal level (P < 0.05), while those from the infertile patients by showing a slight increase, with no significant difference between the peak and basal levels (P > 0.05). Both the peak of the progesterone-induced [Ca2+]i and its increase amplitude expressed as the difference between the peak and basal levels were significantly higher in the normal fertile group than in the infertile patients (P < 0.01).</p><p><b>CONCLUSION</b>The responsiveness of [Ca2+]i to progesterone is reduced in the spermatozoa of patients with unexplained infertility, which suggests a functional defect in the non-genomic sperm membrane progesterone receptor responsible for calcium influx.</p>
Asunto(s)
Adulto , Femenino , Humanos , Masculino , Adulto Joven , Reacción Acrosómica , Calcio , Estudios de Casos y Controles , Infertilidad Masculina , Progesterona , Farmacología , EspermatozoidesRESUMEN
<p><b>OBJECTIVE</b>To investigate the effects of experimental left varicocele (ELV) on the expression of sperm associated antigen 11 (SPAG11) mRNA and its protein isomer SPAG11E in the testis and epididymis of adolescent rats, and to explore the mechanism of infertility caused by varicocele.</p><p><b>METHODS</b>The experimental left varicocele model was established in the adolescent male Sprague-Dawley rats. Two and 4 weeks after the operation, the changes of SPAG11 mRNA and SPAG11E expression in the testis and epididymis were detected using immunohistochemistry and reverse transcription-polymerase chain reaction (RT-PCR).</p><p><b>RESULTS</b>The expected product of SPAG11 367 bp amplified by RT-PCR was detected only in the epididymis. SPAG11E protein was observed mainly in the acrosomal vesicles and acrosome of round and elongating spermatids of the seminiferous epithelium, in the cytoplasm of Leydig cells, and in the supranuclear region of principle cells and stereocilia of the epididymal epithelium. Imaging and statistical analysis showed that SPAG11 mRNA and SPAG11E protein expressions in the left epididymis of the 2- and 4-week ELV groups presented a remarkable decrease (P < 0.05 or P < 0.01) compared with the right side and the corresponding control group, and the same decreased change in the left epididymis (P < 0.05 or P < 0.01) and an obvious reduction of SPAG11E immunopositive reaction in the right epididymis (P < 0.01) were noted in the 4-week group as compared with the 2-week group. No statistical difference of SPAG11E expression in the bilateral testes was found (P > 0.05) between the ELV group and the control, as well as between the 2- and 4-week ELV groups.</p><p><b>CONCLUSION</b>SPAG11 is a specific gene expressed in the epididymis. The localization and expression of SPAG11E exhibited a region- and cell-specific pattern in both the testis and epididymis of adolescent rats. The expression levels of both SPAG11 mRNA and SPAG11E protein altered obviously in ELV rats. The results suggest that SPAG11 may not only play an important role in spermatogenesis and sperm maturation, but also be associated with varicocele-induced male infertility or subfertility.</p>
Asunto(s)
Animales , Masculino , Ratas , Antígenos de Superficie , Genética , Metabolismo , Modelos Animales de Enfermedad , Epidídimo , Metabolismo , Glicopéptidos , Genética , Metabolismo , Inmunohistoquímica , ARN Mensajero , Genética , Metabolismo , Ratas Sprague-Dawley , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Testículo , Metabolismo , Factores de Tiempo , VaricoceleRESUMEN
<p><b>OBJECTIVE</b>To study the expressions of the vascular endothelial growth factor (VEGF) and its receptor fms-like tyrosine kinase-1 (Flt-1) in the testis, epididymis and epididymal sperm of adolescent rats and explore the functions of both the proteins in the male reproductive system.</p><p><b>METHODS</b>The expressions of VEGF and Flt-1 were detected in 20 adolescent SD rats, immunohistochemical staining used for both the testis and the epididymis and immunofluorescent staining for sperm.</p><p><b>RESULTS</b>VEGF and Flt-1 proteins were specifically present in the testis, epididymis and sperm. In the testis, VEGF immunoreactive particles were localized in the cytoplasm of spermatogenic cells, the developing acrosome of spermatids, Sertoli cells and Leydig cells, while Flt-1 expressed mainly in the developing acrosome of spermatids and Leydig cells. In the epididymis, the cell-specific and region-specific expressions of VEGF and Flt-1 proteins were observed in the principal cells of epididymal epithelia, VEGF in the whole epididymis, while Flt-1 only in the caput and cauda segments. Both VEGF and Flt-1 were localized in the acrosome of the sperm head as well as in the neck, middle and principal segments of the sperm tail.</p><p><b>CONCLUSION</b>The specific expression patterns of VEGF and Flt-1 in the rat testis, epididymis and sperm indicate that they may independently or collectively affect spermatogenesis and spermiotelcosis in either an autocrinological or a</p>
Asunto(s)
Animales , Masculino , Ratas , Epidídimo , Metabolismo , Ratas Sprague-Dawley , Maduración Sexual , Espermatozoides , Metabolismo , Testículo , Metabolismo , Factor A de Crecimiento Endotelial Vascular , Receptor 1 de Factores de Crecimiento Endotelial VascularRESUMEN
<p><b>OBJECTIVE</b>To investigate the progesterone-binding site on the normal fertile human sperm membrane after 2 hours of in vitro capacitation.</p><p><b>METHODS</b>Viable spermatozoa were selected by a swim-up method. After 2 hours of in vitro capacitation, multipoint saturation binding experiments were performed. Sperm suspension and increasing concentrations of progesterone-11alpha-glucuronide-[125I] iodotyramine (125I-P) were added to 7 total binding tubes respectively, and equal amounts of sperm suspension and 125I-P were added to another 7 corresponding non-specific binding tubes in the presence of 10 micromol/L progesterone. After incubation for 1 hour at 4 degrees C, the radioactivity of both the tubes and the pellets after centrifugation was measured respectively. The equilibrium dissociation constant (Kd) and maximum binding capacity (Bmax) were calculated using the mathematical model of single site multi-point saturation method of Scatchard function and least-squares regression.</p><p><b>RESULTS</b>Kd was (0.61 +/- 0.04) nmol/L and Bmax was (830 +/- 344) sites/cell. The significance test of the regression equation indicated that r = -0.980, P < 0.01.</p><p><b>CONCLUSION</b>There is a high affinity and low capacity binding site for the progesterone (progesterone receptor) on the normal fertile human sperm membrane.</p>
Asunto(s)
Adulto , Humanos , Masculino , Membrana Celular , Química , Progesterona , Ensayo de Unión Radioligante , Receptores de Progesterona , Capacitación Espermática , Espermatozoides , QuímicaRESUMEN
<p><b>OBJECTIVE</b>To establish an automatic, high throughput, quick detection method of alpha thalassemia.</p><p><b>METHODS</b>The genotypes of -alpha(4.2) and -alpha(3.7) were detected by two real-time fluorescence PCRs using SYBR-Green1 (SYBR-PCR) with the analysis of dissociation curve (DC) and melting temperature (Tm). The PCR products were recombined into T-vector and the correct cloning was selected as positive control. Sensitivities were gained from a serious dilution of the recombinant as SYBR-PCR template, from which detection deadlines for two kinds of alleles could be determined. Totally 110 samples were detected by this technique.</p><p><b>RESULTS</b>The length of product of -alpha(4.2) and -alpha(3.7) were 1.65 kb and 1.9 kb respectively, and the Tm were (81.5+/-0.5) degrees C and (82.5+/-0.5) degrees C respectively. The detection deadline were 9 x 10(2 ) copies and 4.3 x 10(2) copies respectively. The sensitivity of the technique was much higher than that of regular PCR plus gel electrophoresis method, and the detection results of the technique were the same as that of multiplex PCR.</p><p><b>CONCLUSION</b>The genotypes of -alpha(4.2), -alpha(3.7), non-deletion alpha alpha/and --(SEA) can be sensitively, exactly diagnosed by the real-time PCR with SYBR-Green1 combined with the dissociation curve analysis. The assay is automatic, low-cost, high throughput, and easy for quality control without fluorescence probe.</p>
Asunto(s)
Humanos , Genotipo , Reacción en Cadena de la Polimerasa , Métodos , Reproducibilidad de los Resultados , Sensibilidad y Especificidad , Talasemia alfa , Diagnóstico , GenéticaRESUMEN
<p><b>OBJECTIVE</b>To investigate the expression of human epididymal secretary protein 2 isoform human epididymal protein 2beta1(HE2beta1) in the testis and epididymis of adolescent male rats along with its significance.</p><p><b>METHODS</b>Immunohistochemical staining was used to detect the expression and localization of HE2beta1 in the testis and epididymis of 15 adolescent SD rats.</p><p><b>RESULTS</b>HE2beta1 immunoreactive staining was detected in the testis and epididymis. In the epithelia of the epididymal duct, HE2beta1 expressed mainly in the supranuclear region of the principle cells and the basement membrane of some epithelial cells; there were no immunostaining in the n clear cells, halo cells and basal cells. The immunopositive reaction was detected, weak in the distal caput, strong in the proximal, middle corpus and the cauda, but negative in the initial segment. Immunopositive results of HE2beta1 were also observed in some of the nuclei of spermatogonia and Sertoli cells with negatively-stained cytoplasm.</p><p><b>CONCLUSION</b>Immunohistochemical staining is a fairly sensitive method for detecting HE2beta1 expression. The localization and expression level of HE2beta1 in the genital duct of adolescent male rats exhibited a region- and cell-specific expression pattern, which suggests that HE2beta1 may play an important role in spermatogenesis, maturation and epididymal epithelial innate defense mechanisms.</p>
Asunto(s)
Animales , Humanos , Masculino , Ratas , Antígenos de Superficie , Epidídimo , Metabolismo , Glicopéptidos , Inmunohistoquímica , Células Intersticiales del Testículo , Metabolismo , Ratas Sprague-Dawley , Testículo , MetabolismoRESUMEN
<p><b>OBJECTIVE</b>Conducting a meta-analysis to evaluate the efficacy of artificial liver support system (ALSS) in the treatment of hepatic failure in China.</p><p><b>METHODS</b>Clinical trials comparing ALSS vs. routine medical treatment of hepatic failure in China were identified from computer-based literature. The pooled odds ratio and 95% confidence interval (CI) of prognostic indicators, such as survival rate and clinical improvement rate at discharge, were used to measure the magnitude of the efficacy.</p><p><b>RESULTS</b>Ten trials including 1030 patients were identified. The odds ratio (95% CI) of survivorship or improvement of ALSS over routine medical treatment in early, intermediate and advanced stages of hepatic failure were 3.72 (2.03-6.83), 2.79 (2.88-4.14) and 1.85 (0.96-3.56) respectively.</p><p><b>CONCLUSION</b>ALSS treatment is more effective in early and intermediate stages of hepatic failure than routine medical treatment, but not in its advanced stage.</p>
Asunto(s)
Humanos , Fallo Hepático , Terapéutica , Hígado Artificial , Pronóstico , Resultado del TratamientoRESUMEN
<p><b>OBJECTIVES</b>To evaluate the long-term efficacy of revaccination in non-responder children to primary hepatitis B (HB) vaccination and to compare the efficacy of low-dose intradermal inoculation to that of routine-dose intramuscular inoculation.</p><p><b>METHODS</b>40 healthy non-responder children to primary HB vaccination identified by screening were given a three-dose revaccination randomly by intramuscular (n = 17, 10 microg per dose) or intradermal route (n = 23, 2 microg per dose) since September, 1999, and their blood specimens were collected regularly for testing for HB virus markers up to five years. Another 80 responder children to primary HB vaccination were also followed-up as controls without revaccination. By the end of five-year follow-up, HBsAg-specific lymphocyte response was investigated in vitro, and a booster dose (5 microg) was given to those with negative conversion of anti-HBs and their anamnestic responses were evaluated 12-14 days later.</p><p><b>RESULTS</b>Serum anti-HBs did not reach 10 IU/L only in one of 40 non-responder children, who received intradermal revaccination. In the fifth year after revaccination, 50% of the non-responder children who received intramuscular revaccination still maintained anti-HBs of > or = 10 IU/L, though the rate was significantly lower than 85% in controls. Following the booster dose, a robust anamnestic response was developed in all of 8 intramuscular revaccinees and 11 controls but 16 of 18 intradermal revaccinees, who lost anti-HBs of > or = 10 IU/L over time, and geometric mean titers of anti-HBs climbed to 208, 105, and 549 IU/L, respectively. Secretions of HBsAg-specific interleukin-2 and -5 could be detected in peripheral blood mononuclear cell samples of more than 70% of non-responder children. Person-year infection rates of HB virus were 8.9% (8/89.9 person-years) for intradermal revaccinees, significantly higher than 3.6% (12/337.2 person-years) in controls, and 4.3% (3/70.2 person-years) for intramuscular revaccinees, approximating to that of controls, based on positive conversion of anti-HBc.</p><p><b>CONCLUSIONS</b>Three-dose intramuscular revaccination did play an important immune protection for non-responder children to primary HB vaccination, but its efficacy could not reach the level of primary vaccination in responders. Low-dose intradermal inoculation was not as effective as route-dose intramuscular inoculation with the same doses in revaccination for non-responder children to primary HB vaccination.</p>
Asunto(s)
Adolescente , Niño , Femenino , Humanos , Masculino , Estudios de Seguimiento , Hepatitis B , Sangre , Alergia e Inmunología , Anticuerpos contra la Hepatitis B , Sangre , Vacunas contra Hepatitis B , Alergia e Inmunología , Esquemas de Inmunización , Inmunización Secundaria , Estudiantes , Factores de Tiempo , Resultado del TratamientoRESUMEN
0);while the gene frequency of HLA-DQA1 * 0401 allele in children FC was 0.9 %,which was lower than that of the control group(8.5 %,P = 0.0350).Conclusion HLA-DQA1 0101 allele maybe a susceptible gene and HLA-DQA1 * 0401 allele maybe a protective gene of FC in children FC in Han nationality in Baotou.There was no correlation between HLA-DQB1 and FC.
RESUMEN
<p><b>OBJECTIVE</b>To develop a single-tube multiplex polymerase chain reaction (mPCR) technique to detect three common deletional alpha-thalassemias (alpha-Thal) in Chinese, and to perform genetic diagnosis and prenatal diagnosis for an alpha-Thal family from Hebei province, China.</p><p><b>METHODS</b>Fourty-two blood samples including samples from one alpha-Thal family from Hebei province were assayed. The mPCR containing 7 primers, gel electrophoresis and DNA sequencing were used for the genetic diagnosis and prenatal diagnosis.</p><p><b>RESULTS</b>The gene types of the fourty-two DNA samples analyzed by the mPCR-gel electrophoresis technique were in accordance with the results by Southern blot and three separate PCR techniques. A HbH child and a fetus of the alpha-Thal family were diagnosed as--(SEA)/alpha(cs)alpha and alpha alpha/alpha alpha respectively by using the mPCR and DNA sequencing. The result of postnatal analysis of the cord blood was consistent with the prenatal result (alpha alpha/alpha alpha).</p><p><b>CONCLUSION</b>The developed mPCR technique can be used for genetic diagnosis and prenatal diagnosis of the 3 deletional alpha-Thal in Chinese.</p>
Asunto(s)
Adulto , Preescolar , Femenino , Humanos , Masculino , Embarazo , Salud de la Familia , Enfermedades Fetales , Diagnóstico , Genética , Eliminación de Gen , Pruebas Genéticas , Técnicas de Diagnóstico Molecular , Métodos , Mutación Puntual , Reacción en Cadena de la Polimerasa , Métodos , Diagnóstico Prenatal , Análisis de Secuencia de ADN , Talasemia alfa , Diagnóstico , GenéticaRESUMEN
Objective To study effective treatment for deep burn on the face caused by coal-dust burning and blasting to prevent severe disfigurement.Methods Early conservative eschar-scraping, delayed skin graft,early strain-diminution for the eyelids in both sides,and wound expansion with skin graft were used to treat 12 patients with deep burn on their faces caused by coal-dust burning and blasting. Results Facial wound of all the 12 patients healed within three weeks after burn.No significant cicatricial hyperplasia and deformity were found on their faces during three-month follow-up,with natural facial expression and abundant emotion.Conclusions Early eschar-scraping and delayed skin graft for deep facial burn can promote fast repair of burn-wound,diminish cicatricial hyperplasia and prevent deformity on the face.
RESUMEN
<p><b>OBJECTIVE</b>To identify gene differential expression in embryo and adult testes by cDNA microarray techniques.</p><p><b>METHODS</b>cDNA probes of embryo and adult testes were used to hybridize the cDNA microarray of human testis, and the clones of differential hybridization were sequenced and analyzed.</p><p><b>RESULTS</b>The calmegin (CLGN) gene which had been confirmed to be involved in spermatogenesis was found, and it exhibited more than 20-fold difference at expression level between adult and embryo human testes.</p><p><b>CONCLUSION</b>Genes differential expression in adult and embryo human testes can be identified by cDNA microarray hybridization.</p>