MicroRNAs (miRNAs) function as negative regulators for the expression of genes involved in cancer metastasis. The aim of this study was to investigate the potential role of miR-98 in gliomas and ...validate its regulatory mechanism.
Cell viability assays are used to measure proliferation of cell. mRNA expression is measured by qRT-PCR. Western blot analysis is used to measure protein expression.
Functional studies showed that miR-98 overexpression inhibited glioma migration and invasion, but had no effect on the cell viability. An enhanced green fluorescent protein reporter assay, quantitative RT-PCR, and a western blot analysis confirmed that miR-98 suppressed the expression of IκB kinase (IKKε) by directly targeting its 3'-untranslated region, also, the NF-κB p65 nuclear translocation and matrix metalloproteinase (MMP)-9 expression were significantly arrested in glioma cells treated with miR-98 mimics. Accordingly, the overexpression of IKKε or NF-κB p65 can restore cell migration and invasion after being inhibited by miR-98, and can restore NF-κB p65 nuclear translocation as well as increase MMP-9 expression.
These findings demonstrated that miR-98 functions as a tumor suppressor in gliomas. Furthermore, miR-98 may act as a potential therapeutic biomarker for glioma patients.
To analyze associated factors and adverse pregnancy outcomes of postpartum hemorrhage in the caesarean section of puerperae with different types of placenta previa.
This retrospective research was a ...case-control study. Puerperae with cesarean section of placenta previa from January 2019 to December 2020 in Women's Hospital, School of Medicine, Zhejiang University were collected and divided into the<1 000 ml control group or ≥1 000 ml postpartum hemorrhage group according to the amount of blood loss during cesarean section. Differences in continuous variables were analyzed by
-test and categorical variables were analyzed by
test. The risk factors of postpartum hemorrhage were analyzed by logistic multivariate regression.
A total of 962 puerperae were enrolled with 773 cases in the control group and 189 cases in the postpartum hemorrhage group. The incidence of gestational weeks, gravidity, parity, induced abortion, placental accreta and preoperative hemoglobin<110 g/L was significantly different between two gr
Summary
The kinetics of serum hepatitis B surface antigen (HBsAg) during the natural history of hepatitis B virus (HBV) infection has been studied, but the factors affecting them remain unclear. We ...aimed to investigate the factors affecting HBsAg titres, using data from multicentre, large‐sized clinical trials in China. The baseline data of 1795 patients in 3 multicentre trials were studied, and the patients were classified into 3 groups: hepatitis B early antigen (HBeAg)‐positive chronic HBV infection (n = 588), HBeAg‐positive chronic hepatitis B (n = 596), and HBeAg‐negative chronic hepatitis B (n = 611). HBsAg titres in the different phases were compared, and multiple linear progression analyses were performed to investigate the implicated factors. HBsAg titres varied significantly in different phases (P = .000), with the highest (4.60 log10 IU/mL 10%‐90% confidence interval: 3.52 log10 IU/mL‐4.99 log10 IU/mL) in patients with HBeAg‐positive chronic HBV infection. In all phases, age and HBV DNA were correlated with serum HBsAg level. In HBeAg‐positive chronic hepatitis B patients, a negative correlation between HBsAg titres and fibrosis stage was observed. Alanine amonitransferase or necroinflammatory activity was also correlated with HBsAg titres in HBeAg‐negative chronic hepatitis B patients. In conclusion, decreased HBsAg titres may be associated with advancing fibrosis in HBeAg‐positive chronic hepatitis B patients or increased necroinflammation in those with HBeAg‐negative chronic hepatitis B. Our findings may help clinicians better understand the kinetics of HBsAg and provide useful insights into the management of this disease.
To investigate the application value of laparoscopic double stapler firings and double stapling technique combined with rectal eversion and total extra-abdominal resection (LDER) in the anal ...preservation treatment of low rectal cancer.
Inclusion criteria: (1) age was 18-70; (2) the distance of the lower tumor edge from the anal verge was 4-5 cm; (3) primary tumor with a diameter ≤3 cm; (4) preoperative staging of T1~2N1~2M0; (5) "difficult pelvis", defined as ischial tuberosity diameter<10 cm or body mass index>25 kg/m
; (6) patients with strong intention for sphincter preservation; (7) no preoperative treatment (e.g., chemotherapy, radiotherapy, molecular targeted therapy, or immunotherapy); (8) no lateral lymph node enlargement; (9) no previous anorectal surgery; (10) patients with good basic condition who could tolerate surgery. Exclusion criteria: (1) previously suffered from malignant tumors of the digestive tract or currently suffering from malignant tumors out of the digestive tract; (2) patients with
2-(4-Methoxyphenyl)-1,3-thiazole4-carboxylic acid was synthesized by condensation, alkylation, and saponification reactions using 4-hydroxythiobenzamide and ethyl 3-bromopyruvate as raw materials. It ...was then reacted with α,ω-dibromoalkanes to obtain ω-bromoalkyl 2-(4-methoxyphenyl)-1,3-thiazole-4-carboxylates which were condensed with 7-hydroxycoumarins. The structure of the synthesized ω-(2-oxo-2
H
-chromen-7-yloxy)alkyl 2-(4-methoxyphenyl)-1,3-thiazole-4-carboxylates was confirmed by IR, NMR, and mass spectra and single crystal X-ray diffraction. Their antiproliferation activity against MCF-7 and cisplatin-resistant MCF-7/DDP human breast cancer cell lines was evaluated by using CCK-8 assay. All compounds showed some inhibitory effect at a concentration of 50 µM, and two compounds were found to be potent on both cancer cell lines.
Genetic Relationship of Populations in China Chu, J. Y.; Huang, W.; Kuang, S. Q. ...
Proceedings of the National Academy of Sciences - PNAS,
09/1998, Letnik:
95, Številka:
20
Journal Article
Recenzirano
Odprti dostop
Despite the fact that the continuity of morphology of fossil specimens of modern humans found in China has repeatedly challenged the Out-of-Africa hypothesis, Chinese populations are underrepresented ...in genetic studies. Genetic profiles of 28 populations sampled in China supported the distinction between southern and northern populations, while the latter are biphyletic. Linguistic boundaries are often transgressed across language families studied, reflecting substantial gene flow between populations. Nevertheless, genetic evidence does not support an independent origin of Homo sapiens in China. The phylogeny also suggested that it is more likely that ancestors of the populations currently residing in East Asia entered from Southeast Asia.
The formation and stability of carbon nanotube (CNT) network in natural rubber (NR), deproteinized NR (DPNR) and polyisoprene (IR) compound were investigated by means of the method of the online ...measured electrical conductance in a whole process from processing and rolling over pressing/cross-linking to post-stretching. The kinetics of CNT flocculation was described and explained by taking into consideration the depletion force considered as driving force and the thickness of the bound rubber layer considered as hindering factor. The presence of linked phospholipids in NR and DPNR improves the rubber-filler interaction of CNTs through the cation-π bonding that hinders the filler flocculation. The absence of the cation-π bonding in CNT/IR compound and the related thin layer of bound rubber are the reason for the strong tendency of flocculation of CNTs in IR even at room temperature. The effect of pressing time, temperature and cross-linking reaction as well as mechanical deformation on the formation and stability of CNT network in NR compounds was also investigated and discussed by taking into consideration the role of the linked phospholipids.
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•Description of the kinetics of CNT network formation in NR, deproteinized NR and isoprene (IR).•CNT network formation determined by the depletion forces and rubber layer bound to CNT surface.•Effect of linked phospholipids on CNT wetting and network formation in rubber compounds.•Effect of linked phospholipids on CNT network stability.
Tumour necrosis factor‐α (TNF‐α) plays a pivotal role in viral clearance and host immune response to hepatitis B virus (HBV) infection, of which the production capacity in individuals is demonstrated ...to be influenced by a single nucleotide polymorphism within the promoter region of TNF‐α genes. However, there have been conflicting results reported in previous studies on TNF‐α‐238 and TNF‐α‐863 gene promoter polymorphisms in chronic HBV infection. To derive a more precise estimation of their relationship, we searched Pubmed (January, 1966–August, 2010) and China Biological Medicine Database (January, 1978–August, 2010) and carried out a meta‐analysis involving nineteen studies that included 5245 chronic HBV infection cases and 3181 controls describing G238A genotypes, and eleven studies totalling 3576 cases and 2044 controls describing C863A genotypes. The overall meta‐analysis did not suggest significant associations of TNF‐α‐238 and TNF‐α‐863 gene promoter polymorphisms with chronic HBV infection. However, in subgroup analysis by ethnicity, it indicated that TNF‐α‐238A allele carriers (GA + AA) in European populations had an increased risk of developing chronic HBV infection (OR = 2.22, 95% CI: 1.07–4.58, P = 0.032; OR = 4.46, 95% CI: 1.75–11.38, P = 0.002, respectively), when compared with spontaneous recovered and healthy populations, respectively. However, no significant associations were found in Asian populations in all genetic models. So, we draw the conclusion that the TNF‐α‐238A allele may increase the risk of chronic HBV infection in European populations.
Tumour necrosis factor‐α (TNF‐α) plays a pivotal role in hepatitis B virus (HBV) clearance and host immune response determining the chronicity of HBV infection. However, studies of the association ...between TNF‐α‐857 polymorphism and chronic HBV infection have reported conflicting results. So a meta‐analysis was carried out to draw a more precise conclusion. Pubmed (January, 1966–March, 2011) and the China Biological Medicine Database (January, 1978–March, 2011) were searched using the keywords TNF‐α gene polymorphism in combination with HBV infection without language restriction. Fourteen studies including 4929 chronic HBV infection cases and 2702 controls describing the C857T genotype were included in the meta‐analysis. All fourteen studies focussed on an Asian population. The overall meta‐analysis suggested that TNF‐α‐857T allele reduced the risk of chronic HBV infection in the Asian population (OR = 0.82, 95% CI: 0.71–0.95, P = 0.008) when compared with a spontaneously recovered population. In the sensitivity analyses of the groups obeying Hardy–Weinberg equilibrium (HWE), without the largest study population and without the smallest study population, a similar association was revealed (OR = 0.81, 95% CI: 0.68–0.98, P = 0.043; OR = 0.77, 95% CI: 0.68–0.87, P = 0.0001; OR = 0.81, 95% CI: 0.70–0.95, P = 0.009, respectively). However, when compared with a healthy population, no significant association was found in the Asian population in all groups. So, we draw the conclusion that the TNF‐α‐857T allele reduces the risk of chronic HBV infection in this Asian population.
The Sine oculis homeobox 1 (Six1) gene is important for skeletal muscle growth and fiber specification; therefore, it is considered as a promising candidate gene that may influence porcine growth and ...meat quality traits. Nevertheless, the association of Six1 with these processes and the mechanisms regulating its expression remain unclear. The objectives of this study were to identify variant sites of Six1 in different pig breeds, conduct association analysis to evaluate the relationship between polymorphisms of these variants and porcine production traits in Pietrain × Duroc × Landrace × Yorkshire commercial pigs, and explore the potential regulatory mechanisms of Six1 affecting production traits. A total of 12 variants were identified, including 10 single- nucleotide variations (SNVs), 1 insertion- deletion (Indel), and 1 (AC)n microsatellite. Association analysis demonstrated that the SNV, g.1595A>G, was significantly associated with meat color (redness, a*); individuals with the G allele had greater a* values (P < 0.05). Moreover, our results demonstrated that the (AC)n polymorphism in the Six1 promoter was significantly associated with weaning weight (P < 0.05), carcass weight (P < 0.05), and thoracic and lumbar back fat (P < 0.01).In addition, we found that the (AC)n variant was closely related with Six1 expression levels and demonstrated this polymorphism on promoter activity by in vitro experiments. Overall, this study provides novel evidence for elucidating the effects of Six1 on porcine production traits as promising candidate and describes two variants with these traits, which are potential reference markers for pig molecular breeding. In addition, our data on the relationship between porcine Six1 expression and the polymorphic (AC)n microsatellite in its promoter may facilitate similar studies in other species.
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