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1.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi ; 34(6): 626-629, 2023 Jan 05.
Artículo en Chino | MEDLINE | ID: mdl-36642904

RESUMEN

OBJECTIVE: To evaluate the effectiveness of a whole-process health education model among inpatients with ascites type of advanced schistosomiasis. METHODS: A "admission-hospitalization-discharge" whole-process health education model was created, 101 inpatients with ascites type of advanced schistosomiasis were given the whole-process health education. The scores of schistosomiasis control knowledge, attitudes towards schistosomiasis control and healthy behaviors, and awareness of schistosomiasis control knowledge, correct rate of attitudes towards schistosomiasis control and correct rate of healthy behaviors were compared among inpatients with ascites type of advanced schistosomiasis before and after implementation of the whole-process health education. RESULTS: The scores of schistosomiasis control knowledge, schistosomiasis control attitudes and healthy behaviors were all significantly higher among inpatients with ascites type of advanced schistosomiasis after implementation of the whole-process health education than before implementation (Z = -7.688, -3.576 and -4.328, all P values < 0.01). In addition, the awareness of schistosomiasis control knowledge increased from 54.3% to 82.7% (χ2 = 188.886, P < 0.01), and the correct rate of attitudes towards schistosomiasis control increased from 88.4% to 98.0% (χ2 = 22.001, P < 0.01), while the correct rate of healthy behaviors increased from 48.2% to 59.7% (χ2 = 11.767, P < 0.01). CONCLUSIONS: The whole-process health education model may remarkably improve the awareness of schistosomiasis control knowledge and promote the formation of positive attitudes towards schistosomiasis control and correct behaviors among inpatients with ascites type of advanced schistosomiasis, which is of great significance to facilitate patients' cure.


Asunto(s)
Ascitis , Esquistosomiasis , Humanos , Pacientes Internos , Educación en Salud , Hospitalización , Conocimientos, Actitudes y Práctica en Salud
2.
J Hosp Infect ; 115: 59-63, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34098050

RESUMEN

The increasing number of coronavirus disease 2019 (COVID-19) cases in the community has posed a significant epidemic pressure on healthcare settings. When healthcare workers (HCWs) acquire COVID-19, contact tracing and epidemiological investigation might not be adequate for determining the source of transmission. Here, we report a phylogenetic investigation involving two infected HCWs and nine patients to determine whether patient-to-HCW transmission had occurred in a hospital without a previous COVID-19 outbreak. This is the first study to apply phylogenomics to investigate suspected nosocomial transmission in a region with low prevalence of COVID-19. Our results do not support the occurrence of direct patient-to-HCW transmission.


Asunto(s)
COVID-19 , Brotes de Enfermedades , Personal de Salud , Humanos , Filogenia , SARS-CoV-2
3.
Sci Adv ; 7(4)2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33523921

RESUMEN

Pursuing high-level doping without deteriorating crystallinity is prohibitively difficult but scientifically crucial to unleashing the hidden power of materials. This study demonstrates an effective route for maintaining lattice integrity during the combustion chemical vapor deposition of highly conductive boron-doped diamonds (BDDs) through laser vibrational excitation of a growth-critical radical, boron dihydride (BH2). The improved diamond crystallinity is attributed to a laser-enabled, thermal nonequilibrium suppression of the relative abundance of boron hydrides (BH), whose excessive presence induces boron segregation and disturbs the crystallization. The BDDs show a boron concentration of 4.3 × 1021 cm-3, a film resistivity of 28.1 milliohm·cm, and hole mobility of 55.6 cm2 V-1 s-1, outperforming a commercial BDD. The highly conductive and crystalline BDDs exhibit enhanced efficiency in sensing glucose, confirming the advantages of laser excitation in producing high-performance BDD sensors. Regaining crystallinity with laser excitation in doping process could remove the long-standing bottlenecks in semiconductor industry.

4.
J Hosp Infect ; 108: 81-89, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33181278

RESUMEN

BACKGROUND: Restricting urine culture to patients with genuine urinary tract infection (UTI) reduces excessive antimicrobial prescription for asymptomatic bacteriuria. AIM: To evaluate the impact of urine culture diagnostic stewardship on antimicrobial consumption. METHODS: This quasi-study involved two general hospitals and 10 community clinics. In the pre-intervention (control) phase (25th November 2018-2nd February 2019), microscopy and culture results of all urine specimens were reported. In the post-intervention (study) phase (25th November 2019-2nd February 2020), urine cultures were processed and reported only if at least one of the following criteria were met: presence of white blood cells or bacteria on microscopy; patient from obstetrics, urology, paediatrics, oncology or renal transplant ward; specimen labelled as 'pregnancy', 'urological procedure', 'renal transplant' or 'neutropenic'; and ureteric, nephrostomy or suprapubic urine. For urine samples that did not fulfil these criteria, the microscopy results and a rejection comment were reported. FINDINGS: In total, 12,282 urine specimens were included in the intervention phase. Of these, 4757 (38.7%) specimens did not fulfil the screening criteria, and the microscopy result and a rejection comment were reported. One hundred and sixty-three (3.4%) of these non-reported urine cultures yielded significant bacterial growth, and the majority were Escherichia coli (N=58, 35.6%). Diagnostic stewardship was independently associated with lower antimicrobial consumption [adjusted odds ratio 0.76, 95% confidence interval (CI) 0.70-0.83, P<0.001] on multi-variable logistic regression across all healthcare settings. Diagnostic stewardship had no effect on patient mortality (adjusted hazard ratio=0.95, 95% CI 0.89-1.01, P=0.08). No patients with unreported urine culture developed bacteraemia from untreated UTI. CONCLUSION: Diagnostic stewardship of urine culture safely reduced excessive antimicrobial prescription for asymptomatic bacteriuria.


Asunto(s)
Antiinfecciosos/administración & dosificación , Programas de Optimización del Uso de los Antimicrobianos , Bacteriuria/tratamiento farmacológico , Prescripciones/estadística & datos numéricos , Infecciones Urinarias/tratamiento farmacológico , Humanos , Urinálisis
5.
Clin Exp Dermatol ; 46(1): 21-27, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-32786033

RESUMEN

Associations between skin microbes or biomarkers and pathological conditions have been reported in the literature. However, there is a lack of clarity on the interaction between the coexistence of common skin microbes with skin physiology and subsequent development of clinical symptoms, and the role of biomarkers in mediating these changes before the development of skin disease. In this review, we aim to identify areas in which extensive research for the studied factors has already been conducted, and which research areas are under-represented. The SciFinder database was searched for articles containing key words including specific skin microbes, biomarkers, skin physiology and diseases from the beginning of the SciFinder data record to 26 April 2016, and we included an additional relevant recent publication from our group. Among the 8000 + articles selected, the frequency of keyword pairs between two roles [microscopic markers (microflora or biomarkers) and reactions (skin physiology or clinical symptoms, or skin disease)] was investigated. Associated research between the individual factors such as skin microflora or biomarkers (chosen based on our earlier publication) and specific biophysical parameters, symptoms or skin disease was identified. The present research heatmap emphasizes the significance of a structured review of research on concerned factor associations to identify early/subclinical clues that can be used to prevent progression to overt skin disease with the help of precise skin care or early intervention, as indicated by skin microflora, biomarkers and an interactive skin biophysics profile. The findings provide a novel approach to explore such associations and may guide future research directed towards predicting disease from early/subclinical symptoms.


Asunto(s)
Biomarcadores , Enfermedades de la Piel/microbiología , Fenómenos Fisiológicos de la Piel , Piel/microbiología , Humanos , Piel/patología , Piel/fisiopatología , Enfermedades de la Piel/fisiopatología
6.
Eur Rev Med Pharmacol Sci ; 24(18): 9591-9600, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-33015802

RESUMEN

OBJECTIVE: This study is aimed at analysing the endogenous metabolites profiling of patients with diabetic osteoporosis, so as to provide the reference for pathogenesis research of diabetic osteoporosis. PATIENTS AND METHODS: The 1H-NMR metabolomics technology, combined with pattern recognition analysis and SIMCA-P 12.0 statistical analysis, were employed to identify the metabolites differences between diabetic patients with disordered bone metabolism (research group) and healthy volunteers (normal group) in this study. RESULTS: Compared with normal group, the results show that in research group, the levels of O-acetyl glycoprotein, proline, 1-methyl histidine, tricarboxylic acid cycle (TCA cycle) product (citric acid and α-ketoglutaric acid) decline, while the levels of branched chain amino acids (leucine, isoleucine, valine), glucose, choline, creatine, inositol, glutamine, aspartic acid, alanine, glycine, and citrulline increase. CONCLUSIONS: There are disordered metabolic pathways and imbalanced bone synthetic materials and regulatory substances in diabetic patients with bone metabolic abnormality. These metabolic abnormalities could be the specific indicators in early diagnosis of diabetic osteoporosis.


Asunto(s)
Enfermedades Óseas Metabólicas/metabolismo , Diabetes Mellitus/metabolismo , Metabolómica , Enfermedades Óseas Metabólicas/sangre , Diabetes Mellitus/sangre , Femenino , Humanos , Masculino , Persona de Mediana Edad , Espectroscopía de Protones por Resonancia Magnética
7.
Beijing Da Xue Xue Bao Yi Xue Ban ; 52(3): 578-581, 2020 Jun 18.
Artículo en Chino | MEDLINE | ID: mdl-32541995

RESUMEN

OBJECTIVE: To study the effects of ulnar styloid and sigmoid notch fractures on postoperative wrist function in patients with distal radius fracture. METHODS: In total, 139 patients treated for distal radius fracture in the Department of Orthopedic Trauma at Peking University People's Hospital from Jan. 2006 to June 2016 were selected for outpatient follow-ups. Evaluation was based on Sartiento's modification of the Gartland and Werley scores. Efficacy was assessed with wrist pain as the focus. RESULTS: The excellent and good efficacy rate was 97.1% (excellent: n=107, 77.0%; good: n=28, 19.4%; and fair: n=4, 2.9%). Gender, age, and whether the ulnar styloid fracture achieved union did not significantly impact the scores (P>0.05). The scores of the basal fracture group were significantly different (P=0.001). Internal fixation of ulnar styloid fracture was associated with a significant difference in scores (P=0.005). The effect of sigmoid notch fracture was also associated with a significant difference in scores (P=0.024). This study included 22 cases of ulnar wrist pain, and the overall incidence of ulnar wrist pain was 15.8%. Gender, age, whether the ulnar styloid fracture achieved union, and whether internal fixation was conducted for ulnar styloid fracture and sigmoid notch fracture had no significant effect on the occurrence of ulnar wrist pain (P>0.05). The incidence of ulnar wrist pain was higher in basal fractures than that in tip fractures. Among ulnar styloid fractures, the union rate of basal fracture was higher than that of tip fractures. The union rates of basal fracture and tip fracture were significantly different (P<0.001). Basal fractures were significant risk factors for ulnar wrist pain (P=0.028). Basal fracture of the ulnar styloid group and sigmoid notch fracture group had poor wrist function scores. Wrist function score improved significantly after internal fixation of ulnar styloid fracture. The incidence of ulnar wrist pain was higher in basal fracture group. The union rate in basal fracture group was higher than in tip fracture group. CONCLUSION: The overall effect of surgical treatment of distal radius fracture is satisfactory. Ulnar styloid basal fracture and sigmoid notch fracture are risk factors for postoperative wrist dysfunction in patients with distal radius fracture, and the basal fracture is one of the risk factors of ulnar wrist pain. The union rate of ulnar styloid basal fractures is better than that of tip fractures. Internal fixation of ulnar styloid fracture can improve wrist function.


Asunto(s)
Fracturas del Radio , Fijación Interna de Fracturas , Humanos , Rango del Movimiento Articular , Resultado del Tratamiento , Fracturas del Cúbito , Muñeca , Articulación de la Muñeca
8.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi ; 32(3): 308-310, 2020 Apr 26.
Artículo en Chino | MEDLINE | ID: mdl-32468797

RESUMEN

OBJECTIVE: To examine the effect of rational emotive therapy on negative emotions among advanced schistosomiasis patients with repeated hospitalizations. METHODS: A total of 97 advanced schistosomiasis patients with anxiety and depressive emotions that were hospitalized in Xiangyue Hospital of Hunan Institute of Schistosomiasis Control for three times or more were enrolled, and given rational emotive therapy for 4 weeks in addition to routine nursing care. The scores for anxiety, depression and quality of life were estimated in patients before and after the rational emotive therapy using the Self-Rating Anxiety Scale (SRS), the Self-Rating Depression Scale (SDS) and WHOQOL-BREF Form. RESULTS: The SAS and SDS scores were significantly lower 4 weeks following rational emotive therapy than before the intervention (SAS score, 45.40 ± 7.77 vs. 59.25 ± 9.29, t = 14.021, P < 0.01; 51.48 ± 8.01 vs. 63.93 ± 9.59, t = 12.991, P < 0.01). The percentages of patients with moderate and severe anxiety and depression were significantly lower 4 weeks following rational emotive therapy than before the intervention (P < 0.01), and the scores for each item in the quality of life were all significantly greater 4 weeks following rational emotive therapy than before the intervention (P < 0.01). CONCLUSIONS: Rational emotive therapy may improve the negative emotions and the quality of life of advanced schistosomiasis patients with repeated hospitalizations.


Asunto(s)
Emociones , Hospitalización , Calidad de Vida , Esquistosomiasis , Ansiedad/diagnóstico , Ansiedad/terapia , Depresión/diagnóstico , Depresión/terapia , Humanos , Calidad de Vida/psicología , Esquistosomiasis/psicología , Esquistosomiasis/terapia
10.
Artículo en Chino | MEDLINE | ID: mdl-30808142

RESUMEN

Objective: This study aimed to investigate the P19ink4d expression in cochlea of mice model with noise induced hearing loss and the role of P19ink4d in the degeneration of inner ear cells. It also searched for P19ink4d gene alterations in patients with profound sensorineural deafness.Method: CBA/J mice were exposed to broad band noise at 101 dB SPL for 2 hours, auditory brainstem response (ABR) were examined to confirm noise lead to the permanent threshold shift. Immunohistochemical staining, Western blotting, and real-time polymerase chain reaction (PCR) were performed on cochlear tissues, to elucidate changes in P19ink4d expression in mice after noise exposure. For clinical evaluation, 400 children from unrelated families with severe or profound sensorineural hearing loss (SNHL) were recruited, genomic DNA was obtained from the patients and was subjected to DNA microarray to screen mutations in 4 most common genes. The sample that carried none of the common mutant alleles were subjected to PCR and sequenced to detect mutations in P19ink4d gene.Result: The ABR threshold shift of mice in the experimental group significantly increased after noise exposure and was higher than that in the null-noise group. The ABR of 1 day post noise was least among experimental groups and there is no statistical different between ABR of 7 days and 14 days post noise. The missing of outer hair cells occurred after noise exposure, while the inner hair cells hardly miss. It was found that the P19ink4d expression increased significantly in the inner ear cells 3 hours after noise exposure, then recovered in 24 hours. Western blot indicated that the amount of P19ink4d increased transitorily 3-6 h after the noise. However, no mutation existed within the coding exons of P19ink4d in the patients with profound sensorineural deafness.Conclusion: The results support the concept that P19ink4d may play an important role in the pathogenesis and development of noise induced hearing loss.


Asunto(s)
Inhibidor p19 de las Quinasas Dependientes de la Ciclina , Potenciales Evocados Auditivos del Tronco Encefálico , Pérdida Auditiva Provocada por Ruido , Animales , Umbral Auditivo , Tronco Encefálico , Niño , Cóclea , Inhibidor p19 de las Quinasas Dependientes de la Ciclina/metabolismo , Pérdida Auditiva Provocada por Ruido/metabolismo , Humanos , Ratones , Ratones Endogámicos CBA
11.
Zhonghua Gan Zang Bing Za Zhi ; 27(11): 910-912, 2019 Nov 20.
Artículo en Chino | MEDLINE | ID: mdl-31941250

RESUMEN

The 2019 European Association for the Study of the Liver (EASL) Clinical Practice Guidelines (hereinafter referred to as the EASL Guidelines) extracted the required evidence from detailed research materials, and rigorously graded and condensed the varying strengths of evidence into 32 recommendations and 14 statements (recommendations and reminders) for drug-induced Liver Injury (DILI). This guideline has important reference values for helping clinicians to further improve their understanding of DILI and the level of clinical diagnosis, treatment and prevention; however, there are still several issues worthy of further discussion.


Asunto(s)
Enfermedad Hepática Inducida por Sustancias y Drogas , Guías de Práctica Clínica como Asunto , Enfermedad Hepática Inducida por Sustancias y Drogas/diagnóstico , Enfermedad Hepática Inducida por Sustancias y Drogas/terapia , China , Humanos , Sociedades Médicas
12.
Artículo en Chino | MEDLINE | ID: mdl-31914306

RESUMEN

SummaryEwing's sarcoma is a malignant, round cell tumor arising from the bones and primarily affecting children and adolescent. Involvement of the skull bones is rarely reported, constituting 1%-6% of the total Ewing's sarcoma cases. We describe a 33 years old male patient having Ewing sarcoma of the mastoid and petrous parts of temporal bone, whose clinical presentation mimicked mastoiditis with facial nerve palsy. We discuss the clinical and therapeutic course of an extensive primary Ewing sarcoma of the temporal bone and review this entity's literature in detail. The etiopathology of an acute peripheral facial palsy is often hard to identify. If the facial weakness starts together with symptoms suggesting an inflammatory process, the differential diagnosis may be focused first on diseases like herpes zoster oticus and a severe course of acute purulent otitis media. As an uncommon tumor of the temporal bone, physicians should consider Ewing's sarcoma in the differential diagnosis of children and adolescents who present with facial nerve paralysis. And in the case of ambiguous clinical findings, a surgical exposure of the middle ear is recommended.


Asunto(s)
Sarcoma de Ewing , Neoplasias de los Tejidos Blandos , Hueso Temporal , Adolescente , Adulto , Niño , Humanos , Masculino , Mastoiditis , Sarcoma
13.
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi ; 32(19): 1491-1494, 2018 Oct 05.
Artículo en Chino | MEDLINE | ID: mdl-30550195

RESUMEN

Objective: To observe the characteristics of positional nystagmus and clinical profile of patients with positive positional test, and to explore its possible pathogenesis.Method: One hundred and twenty-one patients with positive positional test in the vestibular function examination were enrolled in the Peking University International Hospital from January to June in 2017. According to the 2017 BPPV guidelines, patients with test positive positional nystagmus were divided into two groups: definite BPPV and the controversial syndrome. Analyses of gender, age and characteristics of nystagmus, with or without recurrent dizziness, headache, and motion sickness were undertaken between the two groups, as well as response to the repositioning maneuver. Result: Of the total 121 cases, 49 cases were diagnosed as definite BPPV, accounting for 40.5%, 72 cases as controversial syndrome, accounting for 59.5%. The proportion of women in the two group was 76.2% and 78.9%, respectively. The average age of definite BPPV and the controversial syndrome was 51.2±16.8 and 51.3±15.7, respectively.There were significant differences in nystagmus duration, spontaneous nystagmus and nystagmus after headshaking between the two groups by chi square test(P<0.01). The mean intensity of horizontal and vertical nystagmus in posterior semicircular canal BPPV was(10.2±7.4) °/s and(36.6±17.5) °/respectively. And the mean intensity of nystagmus in the strong and weak side in horizontal semicircular canal BPPV was(40.8±25.1) °/s and(20.7±11.1) °/respectively. The intensity of horizontal and vertical nystagmus of the controversial syndrome group was(7.2±7.7) °/s and(7.2±4.3) °/s respectively. The incidence of headache in the controversial syndrome group was significantly higher than that in the BPPV group, P=0.013. According to the guidelines, patients were evaluated one day after the initial treatment. The cure rate and effective rate of the definite BPPV group was 75%(36/48) and 87.5%(42/48),and was 0 and 30.4% in the controversial syndrome group respectively. Conclusion: The patients in controversial syndrome group have a preponderance of exhibiting positive nystagmus during positional test. Nystagmus were usually of low velocity and sustained. Most of these cases presented spontaneous nystagmus and headshaking induced nystagmus, as well as headache and lacunar infarctions in history, and the response to the repositioning maneuver were often poor. It may be related to vestibular migraine and central nervous system. The diagnosis of BPPV must be prudent.Both characteristics of nystagmus and medical history should be carefully analyzed to avoid overdiagnosis.

14.
Artículo en Chino | MEDLINE | ID: mdl-29798139

RESUMEN

Objective:To investigate the incidence of tinnitus and its influencing factors in patients with chronic suppurative otitis media, and to provide clinical data for the study of the pathogenesis of tinnitus.Method:The clinical data of 77 patients with chronic suppurative otitis media who underwent modified radical mastoidectomy and tympanoplasty were investigated. When tinnitus and otitis media happened in the same side,then the tinnitus is judged to be otitis media related. Patients were further divided into otitis media related tinnitus and the no tinnitus groups. The differences of tinnitus severity, sleep disturbance, migraine (migraine features), snoring and gastroesophageal reflux were compared between the two groups in tinnitus occurrence and classification.Result:The incidence of otitis media related tinnitus was 55.8%(43/77). Most of the tinnitus happened(33/43) later than the occurrence of otitis media for several years or even decades. There were 43 cases of tinnitus associated with otitis media, and 31 cases without tinnitus. Between the groups, significant differences were observed in migraine features, and the P value is 0.011, while no significant differences were noticed in the severity of hearing loss and sleep disorders, snoring, gastroesophageal reflux. Ranking of otitis media related tinnitus was positively related to the degree of hearing loss, especially the bone conduction threshold. With Spearman rank correlation test,P values of mean value(250Hz,500Hz,1kHz,2kHz,4kHz), middle frequency (1kHz, 2kHz)and high frequency (4kHz) of bone conduction threshold were 0.010,0.019 and 0.003, and the correlation coefficients were 0.391,0.356 and 0.443, respectively.Conclusion:The occurrence of tinnitus in patients with otitis media may not be consistent with the time of otitis media, and theoretically later than the occurrence of otitis media is more reasonable. Whether tinnitus occurs in patients with otitis media is not related to sleep disorders, the degree of air conduction and bone conduction hearing loss, but is related to migraine features. The severity of tinnitus associated with otitis media is associated with bone conduction hearing loss.


Asunto(s)
Conducción Ósea , Otitis Media Supurativa/complicaciones , Acúfeno/complicaciones , Enfermedad Crónica , Pérdida Auditiva , Humanos , Otitis Media
15.
Artículo en Chino | MEDLINE | ID: mdl-29798141

RESUMEN

Objective:To evaluate and characterize tinnitus in elderly volunteers,try to find out the relevant factors that can affect the incidence of tinnitus.Method:The study included 150 elderly volunteers. All volunteers had taken the otology examination and pure tone audiometry. They were interviewed by the investigators who were trained together, using the same questionnaire. The characteristics of tinnitus and the relationship between all relevant factors and tinnitus were analyzed.Result:Average age was 71.4 years. There are now 77 patients with tinnitus(51.3%), of which 31 cases have sustained tinnitus for more than 3 months, accounting for 40.3% of existing tinnitus volunteers. There was negative correlation between tinnitus and age. There was positive correlation between tinnitus and hearing loss. Tinnitus and headache had no correlation(P>0.05).Conclusion:After reach a certain age(70 years old), the incidence of tinnitus decreased. Hearing loss might be the most dangerous factor.If the hearing loss was more serious, the incidence of the tinnitus became higher. Tinnitus in the elderly may be the result of a combination of factors.


Asunto(s)
Pérdida Auditiva/complicaciones , Acúfeno/complicaciones , Anciano , Audiometría de Tonos Puros , Sordera , Humanos , Voluntarios
16.
Oncogene ; 37(1): 128-138, 2018 01 04.
Artículo en Inglés | MEDLINE | ID: mdl-28892048

RESUMEN

Pancreatic cancer is among the deadliest malignancies; however, the genetic events that lead to pancreatic carcinogenesis in adults remain unclear. In vivo models in which these genetic alterations occur in adult animals may more accurately reflect the features of human cancer. In this study, we demonstrate that inactivation of Cdkn2b (p15ink4b) is necessary for induction of pancreatic cancer by oncogenic KRASG12D expression and inactivation of Tp53 and Cdkn2a in adult mouse pancreatic ductal cells (P60 or older). KRASG12D overexpression in these cells activated transforming growth factor-ß signaling and expression of CDKN2B, which, along with CDKN2A, led to cellular senescence and protected cells from KRAS-mediated transformation via inhibition of retinoblastoma phosphorylation. These results show a critical role of CDKN2B inactivation in pancreatic carcinogenesis, and provide a useful adult animal model by genetic engineering via lentiviral delivery.


Asunto(s)
Inhibidor p15 de las Quinasas Dependientes de la Ciclina/genética , Inhibidor p16 de la Quinasa Dependiente de Ciclina/genética , Regulación Neoplásica de la Expresión Génica , Neoplasias Pancreáticas/genética , Animales , Carcinogénesis/genética , Línea Celular Tumoral , Proliferación Celular/genética , Senescencia Celular/genética , Inhibidor p15 de las Quinasas Dependientes de la Ciclina/metabolismo , Inhibidor p16 de la Quinasa Dependiente de Ciclina/metabolismo , Inhibidor p18 de las Quinasas Dependientes de la Ciclina/genética , Inhibidor p18 de las Quinasas Dependientes de la Ciclina/metabolismo , Ingeniería Genética/métodos , Humanos , Masculino , Ratones , Ratones Endogámicos C57BL , Ratones Transgénicos , Neoplasias Experimentales/genética , Neoplasias Experimentales/patología , Neoplasias Pancreáticas/patología , Proteínas Proto-Oncogénicas p21(ras)/genética , Proteínas Proto-Oncogénicas p21(ras)/metabolismo , ARN Interferente Pequeño/administración & dosificación , Proteína de Retinoblastoma/metabolismo , Eliminación de Secuencia , Proteína p53 Supresora de Tumor/genética
17.
Chem Sci ; 8(2): 1141-1145, 2017 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-28451254

RESUMEN

We developed a new fluorogenic bioorthogonal reaction that is based on the inverse electron-demand Diels-Alder reaction between styrene (an unstrained alkene) and a simple tetrazine. The reaction forms a new fluorophore with no literature precedent. We have identified an aminoacyl-tRNA synthetase/tRNA pair for the efficient and site-specific incorporation of a styrene-containing amino acid into proteins in response to amber nonsense codon. Fluorogenic labeling of purified proteins and intact proteins in live cells were demonstrated. The fluorogenicity of the styrene-tetrazine reaction can be potentially applied to the study of protein folding and function under physiological conditions with low background fluorescence interference.

18.
Zhonghua Yu Fang Yi Xue Za Zhi ; 51(4): 313-318, 2017 Apr 06.
Artículo en Chino | MEDLINE | ID: mdl-28395464

RESUMEN

Objective: To develop the Chinese primipara social capital scale (C-PSCS), and to evaluate its validity and reliability. Methods: The items of C-PSCS were developed based on Social Capital Scale by the World Bank and Social Network Scale. This scale was modified according to the characteristics of primiparas. We selected 10 experts who specialized in related field, and two rounds of seminars about content, cultural compatibility, primiparas' characteristics, and practicability. The finally C-PSCS included four dimensions: social trust, social reciprocity, social network, and social participation. Using purposive sampling to select 1 100 primiparas in their third trimesters (gestational weeks from 30 to 36 weeks). The validity analyses included content validity, construct validity and discriminant validity. The reliability analyses included Cronbach' α coefficient, and split-half reliability. Results: 1 035 questionnaires (94.09%) were qualified and the completion time was (13.23 ± 2.53) minutes. The total score of scale was 195.38 ± 45.98, and scores for social trust, social reciprocity, social network, and social participation were 30.26 ± 4.25, 22.84 ± 4.21, 34.23 ± 7.47, and 108.05 ± 41.96, respectively. The common factor cumulative variance contribution rates of each dimension were from 52.92% to 69.37%, which achieved more than 50% of the approved standard, and all the items held factor loading >0.5 in its relevant common factor, it had good construct validity. The scale had a good content validity, the r values between each dimensions and total scale were range from 0.57 to 0.81, P<0.01. For the high-score group, scores for social trust, social reciprocity, social network, and social participation dimensions were 32.89±3.19, 25.65±3.48, 38.27±6.59, 119.94±36.61, respectively, which were higher than low-score group (27.77±3.58, 20.18±2.91, 30.40±6.13, 96.76 ± 43.60), t-values were -24.23, -27.46, -19.90, and -9.24, respectively, P<0.001. It had good discriminant validity. The Cronbach'α coefficient for the total scale and four dimensions were from 0.76 to 0.86, and whose split-half reliability were from 0.68 to 0.84. Conclusion: The validity and reliability of C-PSCS were excellent, and could be used to evaluate the social capital situation on the Chinese primiparas.


Asunto(s)
Capital Social , Encuestas y Cuestionarios , Femenino , Humanos , Masculino , Psicometría , Reproducibilidad de los Resultados
19.
Artículo en Chino | MEDLINE | ID: mdl-29871295
20.
J Fish Biol ; 90(3): 803-818, 2017 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-27943292

RESUMEN

The toll-like receptors (TLR) tlr22 was identified and characterized for the first time in one of the economically most important freshwater fish species in China, Megalobrama amblycephala. The full-length cDNA (4039 bp) of M. amblycephala tlr22 contains an open reading frame of 2706 bp, encoding a 901 amino-acid long polypeptide. The putative polypeptide contains 16 leucine-rich repeat (LRR) motifs, an LRR C-terminal, a transmembrane region and a cytoplasmic toll-interleukin-1 receptor (TIR) domain. Phylogenetic analyses revealed that M. amblycephala Tlr22 shared the closest relationship with a grass carp ortholog. tlr22 was constitutively expressed in nine tissues and during 10 developmental stages studied, albeit with varying expression levels. Along with many pathological changes observed after Aeromonas hydrophila bacterium infection, tlr22 and myd88 mRNA were significantly upregulated in blood, head kidney, spleen and intestine, indicating that tlr22 is involved in the immune response. These results provide an insight into tlr22 regulation mechanisms in the innate immune response to bacterial infection.


Asunto(s)
Aeromonas hydrophila/fisiología , Cyprinidae/metabolismo , Proteínas de Peces/metabolismo , Interacciones Huésped-Patógeno , Receptores Toll-Like/metabolismo , Secuencia de Aminoácidos , Animales , Carpas/genética , China , Clonación Molecular , Cyprinidae/genética , ADN Complementario/genética , Femenino , Enfermedades de los Peces/inmunología , Proteínas de Peces/genética , Regulación de la Expresión Génica , Riñón Cefálico/metabolismo , Inmunidad Innata , Masculino , Datos de Secuencia Molecular , Factor 88 de Diferenciación Mieloide/metabolismo , Filogenia , ARN Mensajero/metabolismo , Receptores Toll-Like/genética
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