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1.
iScience ; 25(1): 103644, 2022 Jan 21.
Artigo em Inglês | MEDLINE | ID: mdl-35005566

RESUMO

Antibiotic-associated diarrhea (AAD) affects a significant proportion of patients receiving antibiotics. We sought to understand if differences in the gut microbiome would influence the development of AAD. We administered a 3-day course of amoxicillin-clavulanate to 30 healthy adult volunteers, and analyzed their stool microbiome, using 16S rRNA gene sequencing, at baseline and up to 4 weeks post antibiotic administration. Lower levels of gut Ruminococcaceae were significantly and consistently observed from baseline until day 7 in participants who developed AAD. Overall, participants who developed AAD experienced a greater decrease in microbial diversity. The probability of AAD could be predicted based on qPCR-derived levels of Faecalibacterium prausnitzii at baseline. Our findings suggest that a lack of gut Ruminococcaceae influences development of AAD. Quantification of F. prausnitzii in stool prior to antibiotic administration may help identify patients at risk of AAD, and aid clinicians in devising individualized treatment regimens to minimize such adverse effects.

2.
Pak J Med Sci ; 38(1): 261-266, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35035436

RESUMO

Objectives: This paper introduces the surgical procedure of "terminal ileum suspension" in the radical resection for low rectal cancer patients and evaluates the possibility of its clinical application. Methods: This paper retrospectively analyzed the data of patients with low rectal cancer who underwent "terminal ileum suspension" during radical resection of rectal cancer (Dixon) in our hospital, and introduces the specific surgical procedures and key points of "terminal ileum suspension". Observe the relevant conditions of patients during the operation, postoperative recovery and postoperative complications, and analyze the safety and feasibility of this operation ("terminal ileum suspension"). Results: The operation of all 8 patients went smoothly, and no anastomotic leakage, intestinal obstruction, and open diversion of suspended terminal ileum were found. The application of "terminal ileum suspension" in the operation of low rectal cancer has achieved ideal clinical effect, without increasing the rate of anastomotic leakage and rehospitalization, reducing the proportion of the secondary return operation, and reducing the pain of the patients. Conclusion: "Terminal ileum suspension" is a safe, effective and feasible surgical method for laparoscopic radical resection of low rectal cancer, which can be applied in clinical practice.

3.
Antiviral Res ; : 105248, 2022 Jan 14.
Artigo em Inglês | MEDLINE | ID: mdl-35038500

RESUMO

Cathelicidins have been shown to effectively inhibit flavivirus replication in vitro. However, the effects of mouse and human endogenous cathelicidins on flavivirus infection in vivo are rarely known. We herein found that mouse endogenous cathelicidin CRAMP was significantly up-regulated upon Zika virus (ZIKV) infection. CRAMP deficiency markedly exacerbated ZIKV replication in testis, and aggravated ZIKV-induced testicular damage and ZIKV-induced spermatic damage in mice, indicating that endogenous cathelicidin is required for protection against ZIKV-caused male infertility in mice. In vitro antiviral assay showed that both mouse cathelidin CRAMP and human cathelicidin LL-37 obviously reduced ZIKV-caused cytopathic effect and inhibited ZIKV replication in Vero cells. Antiviral mechanism revealed that they both directly inactivated ZIKV virons by binding to ZIKV virons and inducing the leakage of ZIKV genomic RNA, consequently inactivated ZIKV virons. In vivo antiviral assay indicated that both of them effectively inhibited ZIKV replication in C57BL/6J and IFNα/ß receptor-deficient (Ifnar1-/-) mice when CRAMP or LL-37 was intravenously injected in parallel with or at 1 h after intravenous injection of ZIKV, implying that mouse cathelidin CRAMP and human cathelicidin LL-37 effectively inactivated ZIKV particles and exhibited therapeutic potential against ZIKV infection in vivo. Our findings reveal that endogenous cahtelicidin CRAMP and LL-37 act as inactivators of ZIKV, and effectively protect against ZIKV replication and ZIKV-induced male infertility, highlighting their potential for therapy of ZIKV infection.

5.
Artigo em Inglês | MEDLINE | ID: mdl-35024995

RESUMO

Racemic praziquantel (PZQ) is the standard treatment for schistosomiasis and liver fluke infections (opisthorchiasis and clonorchiasis). The development of an optimal pediatric formulation and dose selection would benefit from a population pharmacokinetic (popPK) model. A popPK model was developed for R-PZQ, the active enantiomer of PZQ, in 664 subjects, 493 African children (2-15 years) infected with Schistosoma mansoni and S. haematobium, and 171 Lao adults (15-78 years) infected with Opisthorchis viverrini. Racemate tablets were administered as single doses of 20, 40 and 60 mg/kg in children and 30, 40 and 50 mg/kg in 129 adults, and as 3 × 25 mg/kg apart in 42 adults. Samples collected by the dried-blood-spot technique were assayed by LC-MS/MS. A two-compartment disposition model, with allometric scaling and dual first-order and transit absorption, was developed using Phoenix™ software. Inversely parallel functions of age described the apparent oral bioavailability (BA) and clearance maturation in children and ageing in adults. BA decreased slightly in children with dose increase, and by 35% in adults with multiple dosing. Crushing tablets for preschool-aged children increased the first-order absorption rate by 64%. The mean transit absorption time was 70% higher in children. A popPK model for R-PZQ integrated African children over 2 years of age with schistosomiasis and Lao adults with opisthorchiasis, and should be useful to support dose optimization in children. In vitro hepatic and intestinal metabolism data would help refining and validating the model in younger children as well as in target ethnic pediatric and adult groups.

6.
Appetite ; 168: 105706, 2022 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-34560159

RESUMO

Negative emotional experiences are associated with dysregulated eating behaviors that impede weight management. While weight loss interventions promote physical activity and self-regulation of eating, no studies have examined how physical activity may directly influence eating by attenuating associations between negative emotions and eating. OBJECTIVE: The current study examined how momentary negative emotions (stress and anxiety), moderate-to-vigorous intensity physical activity (MVPA), and their interactions predict eating dysregulation (i.e., intensity of eating temptations, inability to resist eating tempting foods, overeating), as well as how these associations change during a weight loss intervention. METHODS: Women with overweight/obesity (N = 55) completed 14-day ecological momentary assessment (EMA) protocols with objective measurement of physical activity (i.e., bout-related MVPA time) before and after a three-month internet-based weight loss program. RESULTS: Three-way interactions emerged predicting overeating and eating tempting foods. When women experienced higher than usual levels of momentary anxiety or stress at end-of-treatment, they were less likely to subsequently overeat or eat tempting foods when they had recently engaged in more MVPA (relative to their usual level). No significant associations were found for ratings of temptation intensity. CONCLUSIONS: Findings suggest MVPA may exert direct effects on eating regulation. Specifically, MVPA appears to increasingly buffer the effect of negative emotional states on dysregulated eating behavior over the course of a weight loss intervention. Future work is needed to develop ways of communicating to patients how activity can have both indirect and direct effects on body weight, and examine whether such knowledge improves outcomes.


Assuntos
Exercício Físico , Sobrepeso , Ansiedade , Comportamento Alimentar , Feminino , Humanos , Hiperfagia , Sobrepeso/terapia , Perda de Peso
7.
Neural Regen Res ; 17(4): 812-818, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-34472480

RESUMO

Circular RNAs (circRNAs) are a new and large group of non-coding RNA molecules that are abundantly expressed in the central nervous system. However, very little is known about their roles in traumatic brain injury. In this study, we firstly screened differentially expressed circRNAs in normal and injured brain tissues of mice after traumatic brain injury. We found that the expression of circLphn3 was substantially decreased in mouse models of traumatic brain injury and in hemin-treated bEnd.3 (mouse brain cell line) cells. After overexpressing circLphn3 in bEnd.3 cells, the expression of the tight junction proteins, ZO-1, ZO-2, and occludin, was upregulated, and the expression of miR-185-5p was decreased. In bEnd.3 cells transfected with miR-185-5p mimics, the expression of ZO-1 was decreased. Dual-luciferase reporter assays showed that circLphn3 bound to miR-185-5p, and that miR-185-5p bound to ZO-1. Additionally, circLphn3 overexpression attenuated the hemin-induced high permeability of the in vitro bEnd.3 cell model of the blood-brain barrier, while miR-185-5p transfection increased the permeability. These findings suggest that circLphn3, as a molecular sponge of miR-185-5p, regulates tight junction proteins' expression after traumatic brain injury, and it thereby improves the permeability of the blood-brain barrier. This study was approved by the Animal Care and Use Committee of Chongqing Medical University of China (approval No. 2021-177) on March 22, 2021.

8.
Sci Total Environ ; 805: 150121, 2022 Jan 20.
Artigo em Inglês | MEDLINE | ID: mdl-34534872

RESUMO

Current estimates of COVID-19 prevalence are largely based on symptomatic, clinically diagnosed cases. The existence of a large number of undiagnosed infections hampers population-wide investigation of viral circulation. Here, we quantify the SARS-CoV-2 concentration and track its dynamics in wastewater at a major urban wastewater treatment facility in Massachusetts, between early January and May 2020. SARS-CoV-2 was first detected in wastewater on March 3. SARS-CoV-2 RNA concentrations in wastewater correlated with clinically diagnosed new COVID-19 cases, with the trends appearing 4-10 days earlier in wastewater than in clinical data. We inferred viral shedding dynamics by modeling wastewater viral load as a convolution of back-dated new clinical cases with the average population-level viral shedding function. The inferred viral shedding function showed an early peak, likely before symptom onset and clinical diagnosis, consistent with emerging clinical and experimental evidence. This finding suggests that SARS-CoV-2 concentrations in wastewater may be primarily driven by viral shedding early in infection. This work shows that longitudinal wastewater analysis can be used to identify trends in disease transmission in advance of clinical case reporting, and infer early viral shedding dynamics for newly infected individuals, which are difficult to capture in clinical investigations.


Assuntos
COVID-19 , SARS-CoV-2 , Humanos , RNA Viral , Eliminação de Partículas Virais , Águas Residuárias
9.
Sci Rep ; 11(1): 23621, 2021 Dec 08.
Artigo em Inglês | MEDLINE | ID: mdl-34880283

RESUMO

The past few decades have seen an uptick in the scope and range of device applications of organic semiconductors, such as organic field-effect transistors, organic photovoltaics and light-emitting diodes. Several researchers have studied electrical transport in these materials and proposed physical models to describe charge transport with different material parameters, with most disordered semiconductors exhibiting hopping transport. However, there exists a lack of a consensus among the different models to describe hopping transport accurately and uniformly. In this work, we first evaluate the efficacy of using a purely data-driven approach, i.e., symbolic regression, in unravelling the relationship between the measured field-effect mobility and the controllable inputs of temperature and gate voltage. While the regressor is able to capture the scaled mobility well with mean absolute error (MAE) ~ O(10-2), better than the traditionally used hopping transport model, it is unable to derive physically interpretable input-output relationships. We then examine a physics-inspired renormalization approach to describe the scaled mobility with respect to a scale-invariant reference temperature. We observe that the renormalization approach offers more generality and interpretability with a MAE of the ~ O(10-1), still better than the traditionally used hopping model, but less accurate as compared to the symbolic regression approach. Our work shows that physics-based approaches are powerful compared to purely data-driven modelling, providing an intuitive understanding of data with extrapolative ability.

10.
Int J Infect Dis ; 2021 Dec 02.
Artigo em Inglês | MEDLINE | ID: mdl-34864193

RESUMO

IMPORTANCE: Since January 2020, Singapore has implemented comprehensive measures to suppress SARS-CoV-2. Despite this, the country has experienced contrasting epidemics, with limited transmission in the community and explosive outbreaks in migrant worker dormitories. OBJECTIVE: To estimate SARS-CoV-2 infection incidence among migrant workers and the general population in Singapore. DESIGN: Prospective serological cohort studies. SETTING: Two cohort studies in a migrant worker dormitory and in the general population in Singapore. PARTICIPANTS: We followed up 478 residents of a SARS-CoV-2 affected migrant worker dormitory between May and July 2020, collecting blood samples at recruitment and after two and six weeks. We also recruited 937 community-dwelling adult Singapore residents for whom pre-pandemic sera were available. These individuals also provided a serum sample at recruitment in November/December 2020. EXPOSURE: Exposure to SARS-CoV-2 in a densely populated migrant worker dormitory and in the general population. MAIN OUTCOMES AND MEASURES: The main outcome measures were the incidence of SARS-CoV-2 infection in migrant workers and in the general population, as determined by the detection of neutralising antibodies against SARS-CoV-2 and adjusting for assay sensitivity and specificity using a Bayesian modelling framework. RESULTS: We found no evidence of community SARS-CoV-2 exposure in Singapore prior to September 2019. We estimated that <2 per 1000 adult residents in the community were infected with SARS-CoV-2 in 2020 (cumulative seroprevalence: 0.16% (95% CrI: 0.008% - 0.72%). Comparison with comprehensive national case notification data suggests that around 1 in 4 infections in the general population is associated with symptoms. In contrast, in the migrant worker cohort, nearly two-thirds had been infected by July 2020 (cumulative seroprevalence: 63.8% (95% CrI: 57.9% - 70.3%); no symptoms were reported in almost all of these infections. CONCLUSIONS AND RELEVANCE: Our findings demonstrate that SARS-CoV-2 suppression is possible with strict and rapid implementation of border restrictions, case isolation, contact tracing, quarantining and social distancing measures. However, the risk of large-scale epidemics in densely-populated environments requires specific consideration in preparedness planning. Prioritisation of these settings in vaccination strategies should minimise risk of future resurgences and potential spillover of transmission to the wider community.

11.
Zhen Ci Yan Jiu ; 46(11): 958-62, 2021 Nov 25.
Artigo em Chinês | MEDLINE | ID: mdl-34865334

RESUMO

OBJECTIVE: To investigate the effect of electroacupuncture combined with thunder-fire moxibustion on urodynamics in patients with neurogenic bladder (NB) after spinal cord injury(SCI). METHODS: A total of 60 patients with NB after SCI were divided into control group and observation group using a random number table, with 30 patients in each group. Bladder management protocol was performed for both groups. The patients in the control group were given electroacupuncture at Shangliao (BL31), Zhongliao (BL33), Xialiao (BL34), and Ciliao (BL32) at both sides, and those in the observation group were given thunder-fire moxibustion as mild-warm moxibustion at Yaoyangguan (GV3), Mingmen (CV4), Qihai (CV6), Guanyuan (CV4), and Zhongji (CV3) in addition to the treatment in the control group; electroacupuncture or moxibustion was performed for 20 min each time, once a day, with 10 times as one course of treatment, and both groups were treated for 3 courses. Number of times of voluntary urination, maximum single urine volume, and number of times of urethral catheterization were recorded at 3 d before and after treatment; maximum urinary flow rate during urination, maximum bladder capacity during urination, bladder pressure during the bladder filling period, and residual urine volume were recorded before and after treatment, and bladder compliance was calculated; clinical outcome was evaluated for both groups. RESULTS: After treatment, both groups had significant reductions in the numbers of times of urination and urethral catheterization (P<0.05) and a significant increase in maximum single urine volume (P<0.05), and the observation group had significantly better results than the control group (P<0.05). After treatment, both groups had significant reductions in residual urine volume and bladder pressure during the bladder filling period, and the observation group had significantly greater reductions than the control group (P<0.05); both groups had significant increases in bladder compliance, maximum bladder capacity during urination, and maximum urinary flow rate during urination, and the observation group had significantly higher values than the control group (P<0.05). The observation group had a significantly higher response rate than the control group ï¼»90.00% (27/30) vs 63.33% (19/30), P<0.05ï¼½. CONCLUSION: Thunder-fire moxibustion combined with electroacupuncture can effectively improve bladder urodynamics and has a marked clinical effect in patients with NB after SCI.

12.
Mycopathologia ; 2021 Dec 02.
Artigo em Inglês | MEDLINE | ID: mdl-34855101

RESUMO

BACKGROUND: Mucormycosis is a lethal fungal infection with increasing incidence. The epidemiology of mucormycosis in current mainland China has not been fully elucidated. OBJECTIVES: To investigate the epidemiology, risk factors, manifestations, diagnosis, treatment and prognosis of mucormycosis in mainland China. METHODS: We searched for published mucormycosis case reports/series in mainland China in the PubMed, WanFang and China National Knowledge Infrastructure databases from January 2001 to July 2020. Cases of proven/probable mucormycosis were included. RESULTS: A total of 390 cases were included in this review. Most of the patients were male (61.3%), and diabetes was the most common predisposing factor (37.2%). Pulmonary mucormycosis (42.1%) was the most common form followed by cutaneous infection (21.0%). Of 390 patients, 24 died before therapy. Among the remaining 366 patients, 208 (56.8%) received antifungal drugs alone, 16 (4.4%) received surgery alone, and 142 (38.8%) received a combination of drugs and surgery, the mortality of the last group is much lower (34/142, 23.9%). The overall mortality was 37.2%. A multivariate analysis indicated that factors associated with increased mortality included corticosteroid use alone as immunosuppressive therapy, rhino-orbito-cerebral or disseminated mucormycosis (compared with pulmonary mucormycosis), and drug administration other than amphotericin B (AmB), posaconazole (POS) and itraconazole (ITR) (compared with the use of conventional AmB), while factors associated with decreased mortality included cutaneous mucormycosis and surgical therapy. Combination or sequential antifungal therapy of AmB and POS or ITR did not reduce mortality compared with conventional AmB monotherapy. CONCLUSION: In mainland China, mucormycosis is a serious fungal infection with high mortality. Corticosteroid use, rhino-orbito-cerebral and disseminated mucormycosis were adverse prognostic factors. Antifungal therapy combined with surgery could improve the prognosis.

13.
Front Oncol ; 11: 753393, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34888238

RESUMO

Background: Phosphorylated CTD-interacting factor 1 (PCIF1) is identified as the only known methyltransferase of N6,2'-O-dimethyladenosine (m6Am) in mRNA. However, its oncogenic and immunogenic role in cancer research is at an initial stage. Methods: Herein, we carried out a pan-cancer analysis of PCIF1, with a series of datasets (e.g., TIMER2.0, GEPIA2, cBioPortal). Results: PCIF1 expression was higher in most cancers than normal tissues and was discrepant across pathological stages. Highly expressed PCIF1 was positively correlated with overall survival (OS) or disease-free survival (DFS) of some tumors. PCIF1 expression had a positive correlation with CD4+ T-cell infiltration in kidney renal clear cell carcinoma (KIRC), CD8+ T cells, macrophages, and B cells in thyroid carcinoma (THCA), and immune checkpoint genes (ICGs) in LIHC but a negative correlation with CD4+ T cells, neutrophils, myeloid dendritic cells, and ICGs in THCA. It also affected tumor mutational burden (TMB) and microsatellite instability (MSI) of most tumors. Conclusion: PCIF1 expression was correlated with cancer prognosis and immune infiltration, suggesting it to be a potential target for cancer therapy.

14.
Preprint em Inglês | medRxiv | ID: ppmedrxiv-21268077

RESUMO

On November 26, 2021, the B.1.1.529 COVID-19 variant was named as the Omicron variant of concern. Reports of higher transmissibility and potential immune evasion triggered flight bans and heightened health control measures across the world to stem its distribution. Wastewater-based surveillance has demonstrated to be a useful complement for community-based tracking of SARS-CoV-2 variants. Using design principles of our previous assays that detect SARS-CoV-2 variants (Alpha and Delta), here we report two allele-specific RT-qPCR assays that can quantitatively detect the Omicron variant in wastewater and their validation against full length synthetic Omicron RNA. The first simultaneously targets mutations Q493R, G496S and Q498R, and the other targets the deletion at H69-V70 of the spike protein. This method is open-sourced and can be implemented using commercially available RT-qPCR protocols, and would be an important tool for tracking the spread and introduction of the Omicron variant in communities for informed public health responses.

15.
Peptides ; 150: 170712, 2021 Dec 17.
Artigo em Inglês | MEDLINE | ID: mdl-34929265

RESUMO

Cathelicidins are diverse effector molecules in the vertebrate immune system and are related to immune regulation, inflammatory response, wound healing, and blood vessel formation. However, little is known about their free radical scavenging ability, especially in vivo. In this study, a cathelicidin molecule (cathelicidin-NV, ARGKKECKDDRCRLLMKRGSFSYV) previously identified from the spot-bellied plateau frog (Nanorana ventripunctata) (Anura, Dicroglossidae, Dicroglossinae) by us was shown to alleviate ultraviolet B (UVB)-induced skin photoaging in mice. Cathelicidin-NV effectively suppressed cytotoxicity, DNA fragmentation, apoptosis and reduced the protein expression levels of JNK, c-Jun, and MMP-1, which are involved in the regulation of collagen degradation in HaCaT cells induced by UVB irradiation. Furthermore, cathelicidin-NV also scavenged UVB-induced intracellular reactive oxygen species (ROS). Taken together, cathelicidin-NV directly scavenged excessive intracellular ROS to protect HaCaT cells, and subsequently alleviated UVB-induced skin photoaging. This study extends reports on the antioxidant function of the cathelicidin family. In addition, the properties of cathelicidin-NV make it an excellent candidate for the prevention and treatment of UV-induced skin photoaging.

16.
Scand J Gastroenterol ; : 1-8, 2021 Dec 29.
Artigo em Inglês | MEDLINE | ID: mdl-34965186

RESUMO

BACKGROUND: Reflux esophagitis (RE) can cause esophageal varices bleeding and largely reduce life quality of liver cirrhosis (LC) patients. AIMS: To clarify the prevalence, severity and risk factors of RE among LC patients. METHODS: A case-control study that enrolled 420 endoscopy-confirmed LC patients with RE as a case cohort and 409 LC patients without RE as a control group was conducted. Logistic regression was used to determine the risk factors for RE among LC patients. RESULTS: The 10-year cumulative incidence rate of RE was 4.79% among the LC patients. The severity of RE among the LC patients was higher than that among the non-LC patients (p<.05). The LC patients with RE patients were older (56 years vs. 53 years) and had higher rates of male patients (77.14% vs. 65.77%), smoking (46.90% vs. 32.76%), alcohol intake (50.24% vs. 41.08%), past endoscopic variceal ligation (EVL) (9.05% vs. 4.65%), endoscopic injection sclerotherapy (EIS) (16.19% vs. 2.69%), hiatus hernia (7.14% vs. 0.13%) and portal vein thrombosis (PVT) (14.05% vs. 4.01%). Logistic regression demonstrated that hiatus hernia, past EIS, PVT, smoking, white blood cell count, age, spleen thickness and platelet (PLT) count were risk factors for RE among the LC patients. CONCLUSIONS: Patients with LC tended to have severer RE than non-LC patients. The special risk factors of RE among LC patients included past EIS and PVT, which deserved extra attention for hepatologists as well as gastroenterologists to prevent.

17.
Front Public Health ; 9: 777255, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34957028

RESUMO

In response to the COVID-19 pandemic, Taiwan has been one of the best performers in the world with extremely low infections and deaths. This success can be attributed to the long experiences dealing with natural disasters and communicable diseases. However, with different disastrous characteristics, the disaster management systems for communicable diseases and natural disasters are very different in terms of laws, plans, frameworks, and emergency operations. Taking the response to COVID-19 pandemic as a study subject, we found that disaster management for communicable diseases can be improved through a comparison with natural disasters, and vice versa. First, having wider and longer impacts than natural disasters, the plans and framework for communicable diseases in Taiwan focus more on national and regional scales. Local governments would need more capacity support including budgets and training to conduct investigations and quarantine during the COVID-19 pandemic. Second, for quick response, the emergency operation for communicable diseases was designed to be more flexible than that for natural disasters by giving the commander more authority to adjust to the circumstances. The commanding system requires a more objective consultation group to prevent arbitrary decisions against the COVID-19 pandemic. Finally, risk governance is important for communicable diseases as well as for natural disasters. Additional efforts should be made to enhance vulnerability assessment, disaster reduction, and risk communication for shaping responses and policies in an efficient and coordinating way.


Assuntos
COVID-19 , Desastres Naturais , Humanos , Pandemias/prevenção & controle , SARS-CoV-2 , Taiwan/epidemiologia
18.
Front Pharmacol ; 12: 628671, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34721005

RESUMO

Peritoneal dialysis (PD) can improve the quality of life of patients with kidney disease and prolong survival. However, peritoneal fibrosis can often occur and lead to PD withdrawal. Therefore, it is imperative to better understand how to inhibit and slow down progression of peritoneal fibrosis. This study aimed to investigate the regulatory effect of Saikosaponin d (SSD), a monomer extracted from the plant Bupleurum, on peritoneal fibrosis and the contribution of TGFß1/BMP7/Gremlin1 pathway cross-talk in this process. To this aim, we used a model 5/6 nephrectomy and peritoneal fibrosis in rats. Rats were divided into four groups, namely a control group (saline administration); a model group (dialysate administration; group M); a SSD group (dialysate and SSD administration); and a positive drug group (dialysate and Benazepril Hydrochloride administration; group M + A). Histological analysis indicated that peritoneal fibrosis occurred in all groups. WB, ELISA, and PCR essays suggested that TGFß1 and Gremlin1 levels in group M were significantly higher than those in group C, whereas BMP7 expression was significantly lower. TGFß1, Gremlin1 and BMP7 levels were significantly lower in the group where SSD was administered than in the other groups. The expression of BMP7 in SSD group was significantly increased. In addition, levels of Smad1/5/8 as assessed by PCR, and levels of p-Smad1/5/8 expression as assessed by WB were also significantly higher in the SSD group than in the M group. Expression of vimentin and α-SMA, two important markers of fibrosis, was also significantly decreased. Our study suggests a role for the TGFß1/BMP7/Gremlin1/Smad pathway in peritoneal fibrosis with potential therapeutic implications. Finally, our results also suggest that the monomer SSD may be able to reverse peritoneal fibrosis via regulation of the TGFß1/BMP7/Gremlin1/Smad pathway.

19.
Artigo em Inglês | MEDLINE | ID: mdl-34748117

RESUMO

This study ascertained to explore the potential contribution of ARRDC3 polymorphisms in the risk and prognosis of glioma. One thousand sixty-one patients and healthy controls were conducted to assess whether ARDC3 polymorphism was associated with glioma risk and prognosis. Four sites in ARRDC3 were selected and genotyped in MassARRAY platform. The calculated odd ratios and 95% confidence intervals from logistic regression were applied for risk assessment. The relationship between ARRDC3 variants and glioma prognosis was evaluated using log-rank test, Kaplan-Meier analysis, and so on. Also, false-positive report probability (FPRP) and statistical power were also assessed. Our findings suggested the negative role of ARRDC3 polymorphisms in the glioma risk. We also found the effect of candidate SNPs in ARRDC3 on the susceptibility to glioma was dependent on the age, gender, and histology of glioma patients. The results suggested that the genetic polymorphisms of ARRDC3 were related to an increased risk of glioma.

20.
Zhongguo Zhong Yao Za Zhi ; 46(19): 5020-5026, 2021 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-34738397

RESUMO

The chemical constituents in the ethyl acetate extract of Corydalis tomentella was isolated and purified with normal and reversed phase silica gel column chromatography, Sephadex LH-20, MCI, and semi-preparative HPLC. The compound structures were identified based on spectroscopic experiments and reported papers. Finally, eighteen compounds(1-18) were obtained from C. tomentella, including 17 alkaloids and 1 terpenoid. Among them, compound 1(tomentellaine A) was a novel alkaloid. Compounds 2-5, 7-14, and 16-18 were isolated from this plant for the first time.


Assuntos
Alcaloides , Corydalis , Cromatografia Líquida de Alta Pressão , Cromatografia de Fase Reversa , Extratos Vegetais
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