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1.
Eur Rev Med Pharmacol Sci ; 24(9): 4738-4744, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32432737

RESUMO

OBJECTIVE: In recent years, the death number of renal cell carcinoma (RCC) has been enhanced annually. The crucial function of long non-coding RNA (lncRNA) in the occurrence and progression of cancer is of great significance. However, the specific role of lncRNAs in the pathogenesis and prognosis of RCC has not been fully elucidated. Therefore, the aim of this study was to uncover the role of lncRNA RP11-567G11.1 in regulating the progression of RCC. PATIENTS AND METHODS: Relative expression level of RP11-567G11.1 in RCC tissues and cells was determined by quantitative Real Time-Polymerase Chain Reaction (qRT-PCR). The influences of RP11-567G11.1 on proliferative and invasive abilities of RCC cells were assessed. Subsequently, regulatory effects of RP11-567G11.1 on the viability and apoptosis of DDP-induced RCC cells were examined. Furthermore, the mRNA and protein levels of Notch pathway-related genes Jagged1/HES5/HEY1 in RCC were detected by qRT-PCR and Western blot, respectively. RESULTS: RP11-567G11.1 expression was significantly up-regulated in RCC tissues and cells. Meanwhile, RP11-567G11.1 was highly expressed in RCC patients with advanced stage. Knockdown of RP11-567G11.1 significantly attenuated proliferative and invasive abilities of 786-O and 769-P cells. Silence of RP11-567G11.1 attenuated viability, while it induced apoptosis in DDP-induced RCC cells. In addition, knockdown of RP11-567G11.1 remarkably down-regulated both mRNA and protein levels of Jagged1, HES5, and HEY1 in RCC. CONCLUSIONS: RP11-567G11.1 accelerates the proliferative and invasive abilities of RCC through activating the Notch pathway. Our findings suggest that it may be a new therapeutic target for RCC.

2.
Zhonghua Er Ke Za Zhi ; 58(5): 374-380, 2020 May 02.
Artigo em Chinês | MEDLINE | ID: mdl-32392952

RESUMO

Objective: To explore the feasibility and safety of minimally invasive surfactant administration (MISA) in preterm neonates with respiratory distress syndrome (NRDS). Methods: In this multicenter prospective randomized controlled trial, 92 preterm infants with gestation age ≤30 weeks and diagnosed with NRDS were enrolled in 8 level Ⅲ neonatal intensive care units (NICU) in Beijing-Tianjin-Hebei Region from 1(st) July 2017 to 31(st) December 2018. They were randomly assigned to minimally invasive surfactant administration (MISA) group or endotracheal intubation surfactant administration (EISA) group according to random number generated by computer. Infants in both groups received calf pulmonary surfactant preparation at a dose of 70-100 mg/kg. The data of demography, perinatal situation, medication administration, complications, clinical outcomes in the two groups were compared with Chi-square test, Student's t-test, Mann-Whitney U test or Fisher's exact test. Results: Among the 92 preterm infants, 53 were males, 39 were females; 47 were in the MISA group (25 males), and 45 were in the EISA group (28 males). The gestational age and birth weight were (29.5±1.2) weeks and (1 271±242) g in all patients, (29.5±1.4) weeks and (1 285±256) g in the MISA group, and (29.6±0.9) weeks and (1 255±227) g in the EISA group. The duration of surfactant infusion and the length of whole procedure in the MISA group were significantly longer than that in the EISA group (60 (18, 270) s vs. 50 (30, 60) s, Z=3.009, P=0.003; 90 (60, 300) s vs. 60 (44, 270) s, Z=3.365, P=0.001). For the outcomes, the incidence of hemodynamically significant patent ductus arteriosus (hsPDA) and bronchopulmonary dysplasia (BPD) were lower in the MISA group than in the EISA group (36% (17/47) vs. 67% (30/45), χ(2)=8.556, P=0.003; 26% (12/47) vs. 47% (21/45), χ(2)=4.464, P=0.035). Conclusions: Minimally invasive surfactant administration is applicable in preterm infants ≤30 weeks gestational age with NRDS. Although the length of whole procedure is longer than route endotracheal administration, the benefit of decreasing the incidences of hsPDA and BPD outweighs this demerit.

3.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi ; 32(2): 191-194, 2020 Apr 07.
Artigo em Chinês | MEDLINE | ID: mdl-32458610

RESUMO

OBJECTIVE: To investigate the morphological characteristics of Echinostoma miyagawai in domestic ducks in Wuhu area, and to explore the feasibility of the cytochrome oxidase subunit-1 (Cox1) gene as a molecular marker for the identification of E. miyagawai. METHODS: E. miyagawai was isolated from free-ranged domestic ducks in Wuhu area, and the parasites were stained and identified. In addition, the mitochondrial Cox1 gene of E. miyagawai was amplified using a PCR assay, and the amplification product was sequenced and aligned with the GenBank database to yield the homology for the identification of parasite species in combination with morphological findings. Intra-species comparison was done based on the Cox1 gene sequence. RESULTS: The prevalence of E. miyagawai infection was 16.67% in domestic ducks in Wuhu area, and the adult E. miyagawai was 6.6 to 13.2 mm in length. The size of the E. miyagawai Cox1 gene was approximately 660 bp, which had a 99.68% homology to the E. miyagawai accessed in GenBank. The morphological findings were in agreement with molecular identification. CONCLUSIONS: E. miyagawai infection is common in domestic ducks in Wuhu area, and the mitochondrial Cox1 gene is a feasible marker of intra- and inter-species molecular identification of Echinostoma.

4.
Eur Rev Med Pharmacol Sci ; 24(7): 3839-3848, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32329860

RESUMO

OBJECTIVE: The RIB43A domain with coiled-coils 2 (RIBC2) encodes an uncharacterized vertebrate protein exhibiting similarity with Chlamydomonas protofilament ribbon proteins, required for ciliary motility. To date, no functional variants capable of triggering a change in the expression of RIBC2 have been reported. PATIENTS AND METHODS: The genotypes of rs2272804 in 30 individuals were identified with Sanger sequencing to estimate allele frequencies. Dual-Luciferase and mutagenesis assays were carried out to investigate the impact of rs2272804 on transcriptional and translational levels. The microarray data of 7 types of cancer were obtained from the Gene Expression Omnibus (GEO) to explore the role of rs2272804 in those diseases. RESULTS: In this study, we identified a common variant in the 5'UTR of RIBC2, rs2272804, which can create an upstream open reading frame (uORF) in the 5'UTR significantly inhibiting the expression of its host gene. Using Dual-Luciferase constructs, we found that this variant leads to an 85% reduction in translational efficiency, but only a 20% decrease was observed at the transcriptional level. In terms of population studies, mRNA levels of RIBC2 varied according to their rs2272804 genotypes. The "A" allele homozygotes, which created a uORF, showed the lowest transcriptional levels while the transcriptional activity of the "C" allele homozygotes without an uORF was the highest, consistent with the in-vitro studies. Furthermore, we explored its role in 7 types of cancer and identified RIBC2 as a significantly differentially expressed gene (DEG) in breast cancer (BRCA), ovarian serous cystadenocarcinoma (OV), and kidney renal clear cell carcinoma (KIRC). Finally, we showed that the overexpression of RIBC2 enhanced the expression of TRIM37 and down-regulated TRAF2. TRIM37 is a member of the tripartite motif (TRIM) family involved in developmental patterning and oncogenesis while TRAF2 is associated with the signal transduction from members of the TNF receptor superfamily. CONCLUSIONS: Our reports identified a common variant that exerts a dramatic impact on expression efficiency and provides further functional insight into RIBC2.

5.
Zhonghua Liu Xing Bing Xue Za Zhi ; 41(5): 662-666, 2020 May 10.
Artigo em Chinês | MEDLINE | ID: mdl-32223840

RESUMO

Objective: To collect the current status and healthcare needs of people living with HIV (PLHIV) in China during the COVID-19 outbreak to inform quick response from government and communities. Methods: During February 5(th) to 10(th), 2020, a national anonymous survey was conducted using an online questionnaire among PLHIV at least 18 years of age and had started antiretroviral treatment (ART) to collect the information on COVID-19 prevention, HIV-related health services and the needs on psychosocial support. Current status and needs of people living with HIV were analyzed in Hubei and other regions. Results: A total of 1 014 valid questionnaires were collected, with PLHIV respondents cross the country. The survey revealed that 93.79% of the respondents could obtain information regarding the prevention of COVID-19 from their communities or villages. Respondents were concerned with HIV-specific protective measures and personal protective equipment shortage. 32.64% of all respondents were not carrying sufficient antiretroviral medicines (ARVs) to meet the needs under traffic and travel restrictions, and some could face stock-outs in the coming month. In Hubei province where 53 respondents needed ARV refill, 64.15% reported difficulty accessing ARV due to the "blockage" . 28.93% respondents were in need of sociopsychological support, and 85.31% anticipated further improvement of the out-of-town ARV refill process from the government. Conclusion: PLHIV wants to know HIV-specific protective measures against COVID-19 outbreak. PLHIV who returned to their home-towns and affected by the lock-downs reported challenges with refills. We should undertake a more systematic study on impacts of the COVID-19 on PLHIV to develop preparedness capacity for future public health emergency.

6.
J Urol ; : 101097JU0000000000001080, 2020 Apr 14.
Artigo em Inglês | MEDLINE | ID: mdl-32294397

RESUMO

PURPOSE: To evaluate and identify baseline factors associated with change in health-related quality of life (HRQOL) among patients with interstitial cystitis/bladder pain syndrome (IC/BPS) and chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS). METHODS: A total of 191 men and 233 women with IC/BPS or CP/CPPS (collectively referred to as urologic chronic pelvic pain syndrome, or UCPPS) were followed for 12 months with bimonthly completion of the Short Form 12 (SF-12) to assess general mental and physical HRQOL, and with biweekly assessment of condition-specific HRQOL using the Genitourinary Pain Index. A functional clustering algorithm was used to classify participants as improved, stable, or worsened for each HRQOL measure. Ordinal logistic regression was used to determine baseline factors associated with change. RESULTS: Physical HRQOL improved in 22% of the participants, mental HRQOL improved in 25%, and condition-specific HRQOL improved in 47%. Better baseline physical HRQOL, older age, and the presence of non-urologic symptoms were associated with lower likelihood of improvement in physical HRQOL. Better baseline mental HRQOL, female sex, and greater baseline depression and stress were associated with lower likelihood of improvement in mental HRQOL. Better baseline condition-specific HRQOL and more severe baseline UCPPS pain symptoms were associated with lower likelihood of improvement in condition-specific HRQOL. CONCLUSION: While several non-UCPPS factors influenced the trajectory of general HRQOL over time, only condition-specific baseline HRQOL and UCPPS symptoms were associated with UCPPS-specific HRQOL change. Significant differences in how UCPPS impacts various aspects of HRQOL suggest a multidisciplinary approach to assessment and treatment of these patients.

7.
Anim Genet ; 51(3): 457-460, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32239777

RESUMO

Three statistical models (an admixture model, linear regression, and ridge-regression BLUP) and two strategies for selecting SNP panels (uniformly spaced vs. maximum Euclidean distance of SNP allele frequencies between ancestral breeds) were compared for estimating genomic-estimated breed composition (GBC) in Brangus and Santa Gertrudis cattle, respectively. Animals were genotyped with a GeneSeek Genomic Profiler bovine low-density version 4 SNP chip. The estimated GBC was consistent among the uniformly spaced SNP panels, and values were similar between the three models. However, estimated GBC varied considerably between the three methods when using fewer than 10 000 SNPs that maximized the Euclidean distance of allele frequencies between the ancestral breeds. The admixture model performed most consistently across various SNP panel sizes. For the other two models, stabilized estimates were obtained with an SNP panel size of 20 000 SNPs or more. Based on the uniformly spaced 20K SNP panel, the estimated GBC was 69.8-70.5% Angus and 29.5-30.2% Brahman for Brangus, and 63.9-65.3% Shorthorn and 34.7-36.1% Brahman in Santa Gertrudis. The estimated GBC of ancestries for Santa Gertrudis roughly agreed with the pedigree-expected values. However, the estimated GBC in Brangus showed a considerably larger Angus composition than the pedigree-expected value (62.5%). The elevated Angus composition in the Brangus could be due to the mixture of some 1/2 Ultrablack animals (Brangus × Angus). Another reason could be the consequences of selection in Brangus cattle for phenotypes where the Angus breed has advantages.

8.
Phys Rev Lett ; 124(13): 134502, 2020 Apr 03.
Artigo em Inglês | MEDLINE | ID: mdl-32302187

RESUMO

We show unequivocal evidence for formation of He_{2}^{*} excimers in liquid He II created by ionizing radiation produced through neutron capture. Laser beams induce fluorescence of the excimers. The fluorescence is recorded at a rate of 55.6 Hz by a camera. The location of the fluorescence is determined with an uncertainty of 5 µm. The technique provides an opportunity to record the flow of He_{2}^{*} excimers in a medium with very small viscosity and enables measurement of turbulence around macroscopic liter size objects or vortex matter in three dimensions.

9.
Zhonghua Wei Chang Wai Ke Za Zhi ; 23(4): 321-326, 2020 Apr 25.
Artigo em Chinês | MEDLINE | ID: mdl-32306596

RESUMO

Acute abdomen, abdominal trauma, gastrointestinal bleeding and gastrointestinal tumors are the main conditions that are routinely treated in gastrointestinal surgery department with high incidence and critical condition. These conditions need emergency or selective operations. During the outbreak of the coronavirus disease 2019 (COVID-19), it's a great challenge for us to meet the patients' requirement under the situation. As the COVID-19 was brought under control in China, the Department of General Surgery in Nanfang Hospital resumed regular medical services gradually. Based on our clinical practice, the four major measures of strengthening pre-hospital screening, perioperative prevention and control, medical staff protection, and ward management were adopted. These main measures include the strict implementation of the appointment system and triage system before admission; the conduction of epidemiological and preliminary screening of viral nucleic acids; the chest CT examination during the perioperative period to re-screen COVID-19; the reduction of the risk of droplets and aerosol transmission; the minimally invasive surgery combined with enhanced recovery program in order to reduce patient's susceptibility and shorten the length of postoperative hospital stay; the reinforcement of specific infection control training for medical staff; the strict implementation of hierarchical protection; the establishment of gastrointestinal surgery prevention and control system; the rehearsal of emergency exercise; the installation of quarantine wards; the screening and management of family care-givers; the strict disinfection of environment and materials. Our preliminary practice shows that following the work guidelines issued by the Guangdong Province COVID-19 Prevention and Control Office and adopting precise management strategies in combination with the specific clinical features of gastrointestinal surgery, it is possible to safely resume regular care for the patients and comply to epidemic control at the same time.


Assuntos
Infecções por Coronavirus/prevenção & controle , Infecção Hospitalar/prevenção & controle , Procedimentos Cirúrgicos do Sistema Digestório , Gastroenteropatias/cirurgia , Cirurgia Geral/organização & administração , Pandemias/prevenção & controle , Pneumonia Viral/prevenção & controle , Betacoronavirus , China , Controle de Doenças Transmissíveis/métodos , Surtos de Doenças , Fidelidade a Diretrizes , Humanos , Tempo de Internação
10.
Zhonghua Gan Zang Bing Za Zhi ; 28(3): 222-228, 2020 Mar 20.
Artigo em Chinês | MEDLINE | ID: mdl-32306656

RESUMO

Coronavirus disease 2019 (COVID-19) outbreak in Wuhan city, Hubei province in December 2019 and the epidemic so rapidly happened within the whole country and abroad, raising serious problems and urgent concerns, such as: how to control most effectively human-to-human transmission? When does infection rate rise to its peak? What will eventually be the number of infected patients? How to make early diagnosis? What effective antiviral drugs are available? How to use the existing drugs to achieve the best effect? Can available drugs effectively improve the survival rate of critical patients? In view of the above questions, this article now puts forwards the corresponding suggestions and considerations from the perspective of clinical infectious diseases physician.


Assuntos
Infecções por Coronavirus/diagnóstico , Infecções por Coronavirus/tratamento farmacológico , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/prevenção & controle , Pandemias/prevenção & controle , Pneumonia Viral/diagnóstico , Pneumonia Viral/tratamento farmacológico , Pneumonia Viral/epidemiologia , Pneumonia Viral/prevenção & controle , Antivirais/uso terapêutico , Betacoronavirus , Técnicas de Laboratório Clínico , Humanos
11.
Zhonghua Wai Ke Za Zhi ; 58(4): 273-277, 2020 Apr 01.
Artigo em Chinês | MEDLINE | ID: mdl-32241056

RESUMO

In this paper, the mechanism of destroying human alveolar epithelial cells and pulmonary tissue by 2019 novel coronavirus (2019-nCoV) was discussed firstly. There may be multiple mechanisms including killing directly the target cells and hyperinflammatory responses. Secondly, the clinical features, CT imaging, short-term and long-term pulmonary function damage of the 2019 coronavirus disease (COVID-19) was analyzed. Finally, some suggestions for thoracic surgery clinical practice in non-epidemic area during and after the epidemic of COVID-19 were provided, to help all the thoracic surgery patients receive active and effective treatment.


Assuntos
Células Epiteliais Alveolares/virologia , Betacoronavirus/patogenicidade , Infecções por Coronavirus/patologia , Pneumonia Viral/patologia , Cirurgia Torácica , Células Epiteliais Alveolares/patologia , Humanos , Pulmão/patologia , Pulmão/virologia , Pandemias
12.
Eur Rev Med Pharmacol Sci ; 24(6): 2811-2819, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32271398

RESUMO

OBJECTIVE: Intervertebral disc degeneration (IVDD) is mainly associated with a chronic process of the nucleus pulposus (NP) cells disabled. Also, it is accepted to be the basic result of low back pain. The role of phosphatase and tensin homolog (PTEN) in negatively regulating the Akt/PKB signaling, which is the major cell survival pathway, has been documented in previous studies. The present work aimed to investigate the role of PTEN inhibitor VO-OHpic (VO) in the protection of IVDD and to explore its potential mechanisms. PATIENTS AND METHODS: NP cells isolated from patients' lumbar discs were subjected to different concentrations of IL-1ß or H2O2 to establish NP cells degenerated model. Cell proliferation was analyzed by the Cell Counting Kit-8 (CCK-8) assay. The expression levels of collagen II, aggrecan, PTEN, PI3K, Akt, SOD1, SOD2, p16, and ß-galactosidase (ß-gal) were detected by Western blotting, immunofluorescence staining or RT-PCR. Flow cytometry was used to measure the ROS level and cell cycle distribution. RESULTS: Our research showed that collagen II, aggrecan, PI3K, and Akt markedly decreased in IL-1ß- or H2O2-induced degenerated NP cells. VO could reverse the effects of IL-1ß and H2O2 by the PTEN inhibition. Also, we found that VO increased the antioxidant enzymes SOD1, SOD2, CAT, GSH, POD production, and suppressed the ROS in the disc. Besides, data showed VO promoted NP cells proliferation by cell cycle mediation. CONCLUSIONS: These results suggest that VO treatment prevents NP degradation via restraining oxidative stress and increasing cell proliferation through the PTEN/Akt pathway in vitro. VO may become a novel cytokine for the therapy of IVDD in the future.

13.
J Environ Manage ; 264: 110440, 2020 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-32217320

RESUMO

For decades, there has been a strong interest in mitigating greenhouse gas (GHG) emissions from wastewater treatment plants (WWTPs). Numerous models were developed to measure the emissions and propose the quantification. Existing studies looked at the relationship between GHG emissions and operational cost (OCI), which is one of the most important indicators for decision-makers. Other parameters that can influence the control strategies include the effluent quality (EQI) and total environmental impacts. Plant-wide models are reliable methods to examine the OCI, EQI and GHG emissions while Life cycle assessment (LCA) works to assess the potential environmental impacts. A combined LCA and plant-wide model proved to be a valuable tool evaluating and comparing strategies for the best performance of WWTPs. For this study involving a WWTP, the benchmark model is used while LCA is the decision tool to find the most suitable treatment strategy. LCA adds extra criteria that complement the existing criteria provided by such models. Complementing the cost/performance criteria is proposed for plant-wide models, including environmental evaluation, based on LCA, which provides an overall better assessment of WWTPs. It can capture both the dynamic effects and potential environmental impacts. This study provides an overview of the integration between plant-wide models and LCA.


Assuntos
Gases de Efeito Estufa , Águas Residuárias , Meio Ambiente , Efeito Estufa
14.
Zhonghua Gan Zang Bing Za Zhi ; 28(0): E002, 2020 Mar 03.
Artigo em Chinês | MEDLINE | ID: mdl-32125126

RESUMO

In December 2019, the 2019 novel coronavirus pneumonia (NCP, officially named Coronavirus Disease 2019(COVID-19) by the World Health Organization) broke out in Wuhan, Hubei, and it quickly spread to the whole country and abroad. The situation was at stake. The sudden and serious COVID-19 epidemic has brought us a lot of urgent problems. How to effectively control the spread of COVID-19? When does the population infection rate rise to its peak? What will eventually be the number of infected patients? How to make early diagnosis? What effective antiviral drugs are available? How to effectively treat with existing drugs? Can it successfully improve the survival rate of critically patients? In response to the above questions, we put forward corresponding suggestions and reflections from the perspective of the infectious clinician.

16.
Zhonghua Yi Xue Za Zhi ; 100(2): 110-115, 2020 Jan 14.
Artigo em Chinês | MEDLINE | ID: mdl-31937049

RESUMO

Objective: To explore the clinical effect of nutritional and psychological intervention combined with pulmonary rehabilitation exercise on patients with chronic obstructive pulmonary disease (COPD). Methods: A total of 260 patients with COPD admitted to the Sixth Affiliated Hospital of Kunming Medical University from October 2014 to October 2017 were included. They were divided into mild, moderate, severe and extremely severe groups according to forced expiratory volume in one second predicted (FEV(1)%prep) of pulmonary function. The patients were divided into control group and comprehensive management group according to the random number table method. The control group was given routine treatment including smoking quitting persuasion, vaccination, oxygen therapy and standardized medication. The comprehensive management group was given additional nutritional support, psychological intervention and pulmonary rehabilitation exercise. The data of the lung function indexes (FEV(1)%prep, FEV(1)/FVC, PaO(2), PaCO(2)), nutritional indexes [body mass index (BMI), albumin (ALB), nutrition risk screening (NRS)2002], anxiety and depression scores, 6-minute walking distance (6MWD), modified medical research council (mMRC) dyspnea scale, COPD assessment test (CAT), St. George's score, and frequency of acute exacerbations were compared between two groups after 12 months of treatment. Results: After 12 months' treatment, PaO(2) in the comprehensive management group was significantly higher than that in the control group [(51.1±7.2) vs (47.0±9.1) mmHg] (1 mmHg=0.133 kPa); Nutritional risk (NRS2002) decreased obviously [(1.1±1.1) vs (2.2±1.0)]; anxiety score [(4.1±2.2) vs (5.6±2.7)]; depression score [(4.1±2.0) vs (5.5±2.6)] and St. George's score [(36.8±20.8) vs (48.6±19.5)] decreased significantly (P<0.05). And the 6MWD was significantly farther [(368.4±72.0) vs (343.4±75.0) m] in management group. The frequency of acute exacerbations was significantly reduced in the mild, moderate and severe groups (P<0.05). But there was no significant difference in FEV(1)%prep, FEV(1)/FVC, PaCO(2), BMI, ALB, mMRC score and CAT score. Conclusion: Nutritional and psychological intervention combined with pulmonary rehabilitation exercise can reduce the nutritional risk and the frequency of acute exacerbations in patients with COPD, relieve anxiety and depression state and improve the quality of life.


Assuntos
Doença Pulmonar Obstrutiva Crônica , Qualidade de Vida , Terapia por Exercício , Volume Expiratório Forçado , Humanos , Pulmão , Doença Pulmonar Obstrutiva Crônica/terapia
17.
Andrology ; 8(1): 82-90, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31001931

RESUMO

BACKGROUND: We have shown that testosterone administration suppresses hepcidin, stimulates iron-dependent erythropoiesis, and increases hemoglobin and hematocrit. OBJECTIVE: We investigated whether testosterone-mediated suppression of hepcidin plays an essential role in mediating testosterone's stimulatory effects on erythropoiesis. METHODS: We utilized two mouse models to elucidate the role of hepcidin as a mediator of testosterone's effects on erythropoiesis: First, we used a whole-body hepcidin knockout (HepKO) mouse. Because testosterone's effects on hepcidin expression are mediated through androgen receptor, we also utilized a liver-specific androgen receptor knockout mouse (L-ArKO). Effects of 6 weeks of testosterone (50 mg/kg weekly) administration relative to vehicle on hemoglobin and hematocrit, red blood cell indices, and markers of iron stores and availability were compared between wild-type (WT) and the two genetically modified mouse models. RESULTS: HepKO mice had significantly higher baseline levels of hemoglobin, hematocrit, serum and liver iron, and ferritin than WT mice. Compared to vehicle group, testosterone administration was associated with significant increases in hematocrit, hemoglobin, red cell counts, reticulocyte count, reticulocyte hemoglobin, and serum iron levels in both HepKO and WT mice. Baseline hematocrit levels did not differ between WT and L-ArKO mice. Compared to vehicle, testosterone treatment was associated with significantly greater increase in hematocrit, hemoglobin, red cell count, reticulocyte count, reticulocyte hemoglobin, and serum iron in WT and L-ArKO mice. CONCLUSION: Although hepcidin suppression by testosterone increases iron availability and erythropoiesis, hepcidin suppression is not essential for mediating testosterone's effects on erythropoiesis in healthy mice.

18.
J Dairy Sci ; 103(1): 191-200, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31677830

RESUMO

The volatile flavor substances in traditional fermented yak milk samples collected from 5 ecoregions (A: coniferous forests and grasslands of the Qilian Qingdong Mountains; B: alpine grasslands surrounding the lakes in the Qiangtang Plateau; C: alpine shrubs and meadows of the Guoluo-Nagqu Highlands; D: coniferous forests along the alpine valley in East Tibet; E: shrubs and grasslands along the alpine valley in South Tibet) of the Qinghai-Tibetan plateau were comparatively analyzed. The relative percentage composition of volatile flavor substances varied among the different ecoregions. In samples collected from region E, more than 50% of the volatile flavor compounds were esters comprising mainly n-butyl acetate, butyl butyrate, and ethyl octanoate, and a considerable proportion of acetoin was found in samples from regions B and E. Greater proportions of 2-heptanone and 2-nonanone were observed in samples collected from regions A, C, and D compared with regions B and E.


Assuntos
Bovinos/metabolismo , Aromatizantes/química , Cetonas/química , Leite/química , Animais , Meio Ambiente , Fermentação , Alimentos e Bebidas Fermentados , Tibet , Volatilização
19.
Zhonghua Yi Xue Za Zhi ; 99(37): 2932-2934, 2019 Oct 08.
Artigo em Chinês | MEDLINE | ID: mdl-31607024

RESUMO

Objective: To explore the value of CT quantitative features of peritumoral nodules in predicting invasiveness of thymoma. Methods: A retrospective study of 110 patients (65 males and 45 females, with a median age of 45 years) of thymoma with complete clinical, imaging and pathological data in Peking University Third Hospital from March 2013 to October 2018. Patients were divided into high risk (23 males and 15 females, with a median age of 52 years) and low risk groups (42 males and 30 females, with a median age of 42 years) according to the 2004 WHO criteria of thymoma. The major diameter, dual phase contrast CT values, ΔCT values and distance to main tumor of peritumoral nodule were analyzed. The predictive value of CT quantitative parameters were examined with Mann-Whitney U test and ROC curves. Results: Among 110 cases of thymoma, 28 cases had peritumoral nodules.The pathological classification of thymoma were type B1 (12 cases), type B2 (7 cases), type B3 (6 cases) and type C(3 cases). No peritumoral nodules were found in type A and AB.Sixteen patients were categorized into the high risk group whereas the other 12 patients were considered low risk. For high risk group, the major diameter, dual phase contrast CT values, ΔCT values and distance to main tumor of peritumoral nodule were (9.8±3.7) mm, (48±27)HU, (51±21)HU, (17±10)HU and (6.3±6.5)mm, respectively; and for low risk group, the major diameter, dual phase contrast CT values, ΔCT values and the distance to main tumor of peritumoral nodules were (5.5±1.6)mm, (55±18)HU,(52±19)HU, (14±10)HU and (3.9±2.2)mm, respectively. Compared with the low risk group, the major diameter was significantly higher in high risk group (P<0.05). In contrast, dual phase contrast CT values, ΔCT values and the distance to main tumor only changed slightly (all P>0.05). The ROC curve analysis indicated that, the cutoff of the major diameter of peritumoral nodule predicting tumor's high risk was 6.9 mm, and the corresponding AUC, sensitivity, and specificity was 0.862, 75.0% and 75.0%, respectively. Conclusion: The major diameter of peritumoral nodule can potentially predict the invasiveness to thymoma.


Assuntos
Timoma , Neoplasias do Timo , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Curva ROC , Estudos Retrospectivos , Tomografia Computadorizada por Raios X
20.
Clin Transl Oncol ; 2019 Sep 30.
Artigo em Inglês | MEDLINE | ID: mdl-31571151

RESUMO

PURPOSE: Cetuximab (CTX) has been used to treat metastatic colorectal cancer (mCRC) with wild-type (wt) RAS and BRAF genes. Meanwhile HER2 amplification reportedly denoted CTX-resistant mCRC tumors. We investigated whether monitoring of HER2 amplification in circulating DNA allowed early detection of mCRC progression and CTX resistance. METHODS: We analyzed HER2 amplification in circulating DNA at 8-week intervals using ddPCR from 36 patients with RASwt/BRAFwt mCRC, who progressed after CTX treatments between July 2015 and January 2018. RESULTS: Of the 36 patients, 5 (13.9%) exhibited dynamic fluctuations of HER2 amplification in plasma in the course of CTX treatment, of whom 2 were positive for HER2 amplification in matched tumor specimens at baseline (per FISH). All 5 primary sites were left side: 3 rectums and 2 descending colon. HER2 ratio fluctuations in circulating DNA not only reflected changes in tumor volume, but their obvious increases presaged CT-documented progress by an average lead time of 2 months. Interestingly, progression-free survival did not significantly differ between these 5 patients and those without HER2 amplification (HR 1.06, 95% CI 0.40-2.77, P = 0.909). CONCLUSION: Plasma HER2 amplification detected by ddPCR changed over time and predicted resistance to CTX, by an average lead time of 2 months. Further study is needed to validate our findings.

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