1
|
Associations of diagnostic findings with disease activity in primary Sjӧgren's syndrome: a cluster analysis. Rev Clin Esp 2023; 223:209-215. [PMID: 36841475 DOI: 10.1016/j.rceng.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
OBJECTIVE The diagnosis of primary Sjӧgren's syndrome still relies upon a constellation of clinical, laboratory, imaging, and pathological findings. We aimed to evaluate the relation of the disease activity with the results of diagnostic tests for primary Sjӧgren's syndrome. METHODS A principal component with cluster analysis was performed to classify 69 patients with primary Sjӧgren's syndrome based on the results of diagnostic evaluations. RESULTS Anti-SSA autoantibody was the most represented feature on the principal components. The anti-SSA and ultrasound score were positively correlated (p=0.001). We identified two distinct clusters of low or high disease activity (p<0.001). Except for disease duration and serum beta2-microglobulin, the clusters were significantly different in salivary flow (p= 0.004), ultrasound findings (p<0.001), IgG (p= 0.001), and salivary beta2-microglobulin (p= 0.048). Also, positive findings were significantly different between the clusters in rheumatoid factor, antinuclear antibody, anti-SSA, and anti-SSB (all p≤0.013). CONCLUSION Patients with higher syndrome activity were best recognized with serological and ultrasound assessments. However, patients with lower syndrome activity had a longer disease duration, higher stimulated salivary flow rate, and a positive biopsy of minor salivary glands (56%).
Collapse
|
2
|
Notch signaling-induced cyclin d1 in diabetes ameliorating effects of the isolated polysaccharide from Rosa canina: In vitro and in vivo studies. Cell Biochem Funct 2022; 40:935-945. [PMID: 36285737 DOI: 10.1002/cbf.3755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/19/2022] [Accepted: 09/22/2022] [Indexed: 12/15/2022]
Abstract
Notch signaling has a role in the expansion of the pancreas and the pathogenesis of diabetes. Modulation of Notch signaling by natural products seems to pave the way for treating diabetes. This research aimed to scrutinize the involvement of the Notch cascade in the diabetes-ameliorating effects of an isolated polysaccharide from Rosa canina. The isolated polysaccharide was characterized using Fourier transform infrared, nuclear magnetic resonance, high-performance gel-permeation chromatography, and liquid chromatography with tandem mass spectrometry techniques. Rat pancreatic β cells and STZ-induced diabetic rats were treated with the isolated polysaccharide. MTT assay, cell cycle analysis, quantative realtime-polymerase chain reaction, immunohistochemistry, and immunoblotting were used to reveal the growth and the expression levels of Notch1, DLL4, Jagged-1, hes1, Ins-1, Pdx-1, and cyclin d1 in treated and untreated pancreatic cells and tissues. The ameliorating effect of the polysaccharide in STZ-treated cells was accomplished by upregulation of cyclin d1 and hes1 as well as cell cycle progression. Notch inhibition by LY-411575 was associated with the downregulation of cyclin d1 which upregulates with polysaccharide treatment. The significant expression of cyclin d1 (90%) and nuclear expression of hes1 in the pancreas of the polysaccharide group were accompanied by improvement of hyperglycemia and associated biochemical factors as well as regeneration of islet cells as compared to untreated diabetic rats. Based on these findings, upregulation of Notch signaling-induced cyclin d1 could be proposed as the underlying diabetes-reducing effects of the isolated polysaccharide derivative implying that cyclin d1 actuation through activation of the Notch-DLL4 circuit may play the causal role in the treatment of diabetes.
Collapse
|
3
|
Kidney tissue engineering in preclinical models of renal failure: a systematic review and meta-analysis. Regen Med 2022; 17:941-955. [PMID: 36154467 DOI: 10.2217/rme-2022-0084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: This study aims to compare the efficacy of tissue engineering for kidney reconstruction. Materials & methods: We searched MEDLINE, EMBASE (May 2021), and reference lists of review articles. Results: 19 articles matched our inclusion criteria. A range of natural, synthetic and hybrid scaffolds with or without incorporating cells/growth factors was investigated in 937 animals. More favorable results were observed with a combination of two or more biomaterials, addition of bioactive moieties, and cell seeding. Creatinine concentration, PAX2, collagen type-1, α-SMA, vimentin, IL-1, IL-6 and TNF-α gene expressions were significantly increased compared with native control. Conclusion: Tissue engineering can improve renal function and regeneration; however, further research could benefit from using hybrid scaffolds, stem cells and large animal models.
Collapse
|
4
|
Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones, -thione, and -selones, Catalyzed by TiO2 Nanoparticles. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022090184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
5
|
The Safety and Effectiveness of a Polysaccharide Extracted from Rosa Canina in Patients with NAFLD: A Randomized Trial. CLINICAL DIABETOLOGY 2022. [DOI: 10.5603/dk.a2022.0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
6
|
Preparation and Evaluation of Extended-Release Nanofibers Loaded with Pramipexole as a Novel Oral Drug Delivery System: Hybridization of Hydrophilic and Hydrophobic Polymers. J Pharm Innov 2022. [DOI: 10.1007/s12247-022-09625-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
7
|
Four-Component Heterocyclization Reaction for the One-Pot Synthesis of 2,4-Dichloro-Substituted Pyrano/Furo[2,3-d]pyrimidines in an Environmentally Benign Procedure Mediated by Ceric Ammonium Nitrate in Phosphorus Ionic Liquid. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2030769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
8
|
Modulation of Notch signaling and angiogenesis via an isolated polysaccharide from
Momordica charantia
in diabetic rats. J Food Biochem 2021; 46:e14033. [DOI: 10.1111/jfbc.14033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/20/2021] [Accepted: 11/24/2021] [Indexed: 11/29/2022]
|
9
|
Numerical Simulation of Solute Transport in Saturated Porous Media with Bounded Domains. GROUND WATER 2021; 59:892-904. [PMID: 34128237 DOI: 10.1111/gwat.13118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 06/04/2021] [Accepted: 06/13/2021] [Indexed: 06/12/2023]
Abstract
This work presents the first attempt to develop unconditionally stable, implicit finite difference solutions of one-sided spatial fractional advection-dispersion equation (s-FADE) by imposing the nonzero Dirichlet boundary condition (ND BC) or the nonzero fractional Robin boundary condition (NFR BC) at inlet boundary and the zero fractional Neumann boundary condition (ZFN BC) at outlet boundary. The results of the numerical studies performed using artificial solute transport parameters demonstrated that the numerical solution with the NFR BC as the inlet boundary produced much more realistic concentration values. The numerical solution with the NFR BC at the inlet boundary was capable of correctly describing the Fickian and non-Fickian behaviors of the solute transport at different α values, and it had the relatively same accuracy at different numbers of the spatial nodes. Also, the practical application of the numerical solution with the NFR BC as the inlet boundary was investigated by conducting tracer experiments in homogeneous and heterogeneous soil columns. According to the obtained results, this numerical solution described well solute transport in the homogenous and heterogeneous soils. The α values of the homogeneous and heterogeneous soils were obtained in the ranges of 1.849-1.999 and 1.248-1.570, respectively, which were in excellent agreement with the physical properties of the soils. In a nutshell, the numerical solution of the s-FADE with the NFR BC as the inlet boundary can be successfully applied to describe the solute transport in the homogeneous and heterogeneous soils with bounded spatial domains.
Collapse
|
10
|
Michael-Addition-Initiated Chemoselective Three-Component Reaction for the Synthesis of 2-(3-Oxo-1,3-diarylpropyl)malononitrile Derivatives Using Cerium(IV) Ammonium Nitrate in Phosphorus Ionic Liquid. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.1981407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
11
|
Effect of 1-week Calendula officinalis consumption before high-intensity interval exercise on some delayed onset muscle soreness (DOMS) elements in male rowers. COMPARATIVE EXERCISE PHYSIOLOGY 2021. [DOI: 10.3920/cep200087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Previous studies showed that some medicinal herbs can prevent delayed onset muscle soreness (DOMS). The present study investigates the effect of Calendula officinalis supplementation on DOMS elements on male rowers. Thirty healthy adult male rowers were randomly chosen and equally divided into experimental and control groups. Blood samples, Sargent jumps (SJ), and pain perception tests were measured at the starting point. The experimental group consumed (twice a day, 200 μl each time) C. officinalis extract for a week while the control group received a placebo. After consuming the supplementations for a week, the second samples and tests were taken. All the athletes participated in the high-intensity interval exercise (HIIE – a muscle soreness protocol). Third, fourth, and fifth samples/tests were executed immediately, 24 and 48 h after HIIE. Statistical analysis was conducted and P≤0.05 was considered as the significant level. The results showed that HIIE induced a significant increase in the serum tumour necrosis factor-alpha (TNF-α) and creatine kinase-MB (CK-MB) values as well as the pain perception in both groups. TNF-α and pain perception were significantly lower in the experimental group immediately, 24 and 48 h after HIIE. CK-MB activity was significantly decreased in the experimental group during next 24 and 48 h after HIIE. The muscle soreness protocol and its preceding supplementation had no significant effect on SJ. The present study suggests that the consumption of C. officinalis based on the present study dose and timespan may be effective to attenuate inflammation and pain induced by HIIE in male rowers and probably has no functional impact on muscle.
Collapse
|
12
|
The impact of early musical training on striatal functional connectivity. Neuroimage 2021; 238:118251. [PMID: 34116147 DOI: 10.1016/j.neuroimage.2021.118251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 05/05/2021] [Accepted: 06/07/2021] [Indexed: 12/26/2022] Open
Abstract
Evidence from language, visual and sensorimotor learning suggests that training early in life is more effective. The present work explores the hypothesis that learning during sensitive periods involves distinct brain networks in addition to those involved when learning later in life. Expert pianists were tested who started their musical training early (<7 years of age; n = 21) or late (n = 15), but were matched for total lifetime practice. Motor timing expertise was assessed using a musical scale playing task. Brain activity at rest was measured using fMRI and compared with a control group of nonmusicians (n = 17). Functional connectivity from seeds in the striatum revealed a striatal-cortical-sensorimotor network that was observed only in the early-onset group. In this network, higher connectivity correlated with greater motor timing expertise, which resulted from early/late group differences in motor timing expertise. By contrast, networks that differentiated musicians and nonmusicians, namely a striatal-occipital-frontal-cerebellar network in which connectivity was higher in musicians, tended to not show differences between early and late musicians and not be correlated with motor timing expertise. These results parcel musical sensorimotor neuroplasticity into a set of musicianship-related networks and a distinct set of predominantly early-onset networks. The findings lend support to the possibility that we can learn skills more easily early in development because during sensitive periods we recruit distinct brain networks that are no longer implicated in learning later in life.
Collapse
|
13
|
Pd/Cu-Free Cobalt-Catalyzed Suzuki and Heck Using Green Bio-Magnetic Hybrid and DFT-Based Theoretical Study. Catal Letters 2021. [DOI: 10.1007/s10562-020-03487-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
14
|
Rapid and sensitive UHPLC-DAD method for simultaneous determination of sofosbuvir and ledipasvir in human serum. J Pharm Biomed Anal 2020; 195:113860. [PMID: 33387837 DOI: 10.1016/j.jpba.2020.113860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/25/2020] [Accepted: 12/16/2020] [Indexed: 12/29/2022]
Abstract
Today, the direct-acting antiviral agents (DAAs) such as sofosbuvir (SOF) and ledipasvir (LED) are widely used to treat the hepatitis virus infection. The aim of this study was to develop a rapid, simple and valid method for simultaneous determination of SOF and LED in human plasma for bioavailability and pharmacokinetic studies. Chromatographic analysis was performed on the C18 column (Blue Orchid, 1.8 μm, 50 × 2 mm) using 0.1 % formic acid in water (pH 2.6) and acetonitrile (60:40; v/v) as mobile phase at a flow rate of 0.5 mL/min. The UV detector was set at 328 nm and 260 nm for analysis of SOF and LED, respectively. To 400 μL of plasma, 100 μL of clonazepam as the internal standard (I.S, 7 μg/mL) was added and the mixture subjected to liquid-liquid extraction using 1000 μL diethyl ether. The calibration curves were linear with coefficients of variation less than 8% for all analyses. The limit of quantification (LOQ) was 20 and 5 ng/mL for SOF and LED, respectively. The results of inter-day and intra-day precision showed good reproducibility and the total analysis time was 1.2 min. This method successfully applied for determination SOF and LED in four healthy volunteers.
Collapse
|
15
|
Anti-diabetic effect of a novel oligosaccharide isolated from Rosa canina via modulation of DNA methylation in Streptozotocin-diabetic rats. Daru 2020; 28:581-590. [PMID: 32748125 PMCID: PMC7704860 DOI: 10.1007/s40199-020-00363-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 07/28/2020] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Diabetes mellitus (DM) is a well-known clinical entity with various late complications. There is a surge of research aiming to use the medical herb in the management of DM. OBJECTIVE This study aimed to investigate whether the alleviation of DM by an isolated compound from Rosa canina is mediated by DNA methylation in STZ-diabetic rats. METHODS Sixty adult Wistar male rats were classified into control, diabetic and treatment groups. Rats were treated with STZ (40 mg/kg), metformin (500 mg/kg), and oligosaccharide fraction (OF; 10, 20 and 30 mg/kg) isolated from Rosa canina. DNA was extracted from the blood and pancreas to determine DNA methylation using the Global DNA Methylation kit. The expressions of DNA methyltransferases (Dnmts), PDX1, Ins1, GCK and PTP1B2 were determined by using qRT-PCR. RESULTS The significant blood glucose-lowering potential of OF was associated with a reduced level of global DNA methylation (p < 0.05). The expression levels of Dnmts 1 and 3α increased in the pancreas and blood from diabetic rats compared to control group which declined by OF treatment (p < 0.05). Paradoxically, the expression of Dnmt 3β augmented in the pancreas and blood of OF group compared to diabetic ones (p < 0.05). Besides, the expressions of Pdx1, PTP1B2, Ins1 and GCK increased in OF-treated rats compared to diabetic groups. CONCLUSION Results revealed that DNA methylation plays a causal role in the effectiveness of the isolated OF. Furthermore, the possible regenerative potential of oligosaccharide in diabetic rats may have contributed to the modulation of DNA methylation.
Collapse
|
16
|
Molecular epidemiology of Mycobacterium tuberculosis isolates in Iran using spoligotyping. New Microbes New Infect 2020; 38:100767. [PMID: 33204430 PMCID: PMC7652771 DOI: 10.1016/j.nmni.2020.100767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 11/29/2022] Open
Abstract
Spoligotyping can help assess the transmission of Mycobacterium tuberculosis strains. We aimed to study the genotyping of M. tuberculosis isolated from patients with tuberculosis from the west of Iran by spoligotyping. Forty-seven M. tuberculosis isolates were collected from the west of Iran. All samples were cultured on Löwenstein-Jensen medium incubated at 37°C for 8 weeks. Bacterial isolates were identified as M. tuberculosis using standard biochemical tests. Drug resistance patterns of M. tuberculosis to rifampicin and isoniazid were determined, and multidrug-resistant (MDR) strains were isolated. After DNA extraction, spoligotyping was performed. We found new spoligotypes 4162 and 4163, which correlated with atypical lineage. Atypical and unknown lineages also had correlations with the MDR tuberculosis rate (4%). The most prevalent spoligointernational types were orphan (34%), 2669 (23.4%) and 127 (14.8%) types. The most prevalent clades were Ural-2 (NEW-1) (25.53%) and atypical (23.40%) lineages. The predominant clade was Ural-2 (NEW-1) and an atypical lineage restricted to Iran. The rate of MDR was low. Knowledge of the circulating isolates in the west of Iran will help implement control programmes, so knowledge of the dynamic transmission of local isolates is crucial.
Collapse
|
17
|
Protective effect of the isolated oligosaccharide from Rosa canina in STZ-treated cells through modulation of the autophagy pathway. J Food Biochem 2020; 44:e13404. [PMID: 32761921 DOI: 10.1111/jfbc.13404] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 07/01/2020] [Accepted: 07/03/2020] [Indexed: 12/26/2022]
Abstract
Isolation of active components of therapeutic plants and discovering molecular mechanisms play a pivotal role in therapy of diabetes. This study aimed to determine the antidiabetic mechanism of an oligosaccharide isolated from Rosa canina (RCO) by measuring the expression of some miRNAs and their targets involved in autophagy. RCO was extracted and characterized by using HPLC and spectroscopic methods. Rin-5F cells were treated with STZ and RCO alone and in combination. The viability of the cells and the expression of miR-21, miR-22, Akt, ATG5, Beclin1, LC3A, and LC3B were analyzed using MTT assay, and qRT-PCR, respectively. Oligosaccharide fraction could improve the viability of RCO-treated cells as compared to STZ-treated cells. Further, the expression of autophagy markers was increased in RCO-treated diabetic cells compared to STZ-treated cells. The results indicated that the antidiabetic effects of the oligosaccharide components of R. canina seem to be mediated by modulation of autophagy pathway. PRACTICAL APPLICATIONS: Given effectiveness of an oligosaccharide fraction isolated from Rosa canina in management of diabetes in STZ-induced diabetic rats, we have intention to scrutinize its molecular mechanism as modulation of autophagy pathway in STZ-treated Rin-5F cells. It is expected that the results paved the way to speculate novel antidiabetic strategies.
Collapse
|
18
|
Protective and Therapeutic Effects of Aloe Vera Gel on Ulcerative Colitis Induced by Acetic Acid in Rats. Clin Nutr Res 2020; 9:223-234. [PMID: 32789152 PMCID: PMC7402976 DOI: 10.7762/cnr.2020.9.3.223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/11/2020] [Accepted: 07/13/2020] [Indexed: 01/23/2023] Open
Abstract
Ulcerative colitis (UC) is a chronic intestinal inflammation. Common clinical symptoms are weight loss, diarrhea, ulcers, and inflammation. Aloe vera (AV) has several medicinal properties including antioxidant, anti-inflammatory analgesic, and improvement of gastric and skin ulcers. This study aimed to investigate the protective and therapeutic effects of AV gel on acetic acid-induced UC in rats. UC was induced in 48 rats by injection of 4% acetic acid into the rectum. Protective and treatment groups received treatments 7 days before and after the induction of colitis, respectively. The negative control group, the positive control group, and AV groups received distilled water, sulfasalazine, and 50 and 300 mg/kg of gel extract, respectively. Water and food intake and body weight changes were recorded. The extent of the mucosal ulcers, colon tissue thickening, and mucosal bleeding were scored by the Gerald classification system score (microscopy observations). Slides of tissues were prepared for pathologic assay using the modified Wallace method (macroscopic observations). The results of the macroscopic and microscopic examination showed protective and therapeutic effects of 50 mg/kg dose of AV on acetic acid-induced colitis in rats which reduces the inflammation, ulcers and tissue damage compared with negative control (p < 0.05). There were no significant changes in the amount of water and food intake, body weight changes, and colon weight in protective and treatment groups. Based on the results, AV gel could be used to improve the symptoms of UC, as well as prevent people who are susceptible to the UC.
Collapse
|
19
|
Characterization and anti-diabetic effects of the oligosaccharide fraction isolated from Rosa canina in STZ-Induced diabetic rats. Carbohydr Res 2020; 489:107927. [PMID: 32062396 DOI: 10.1016/j.carres.2020.107927] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 12/19/2022]
Abstract
Diabetes mellitus is the most common metabolic disorder characterized by chronic hyperglycemia. There has been a surge of research studies aiming to use natural products in the management of diabetes. The objective of this study was to isolate and characterize the structure and anti-diabetic mechanisms of the main ingredient from Rosa canina. The oligosaccharide was isolated from Rosa canina fruits and characterized by a combination of FTIR, NMR and Mass spectrometry. Wistar rats were divided into negative control, diabetic (type 2), isolated oligosaccharide (IO)-treated diabetic and positive diabetic controls. Oral glucose tolerance, gluconeogenesis and α-glucosidase inhibitory tests as well as immunohistochemistry and quantitative real time-PCR were performed to elucidate the molecular anti-diabetic mechanisms of IO. Structural analyses confirmed the oligosaccharide structure of isolated fraction. Gluconeogenesis and α-glucosidase activity were inhibited by IO in diabetic rats. The oral glucose tolerance test was improved significantly in the group treated with the IO (P < 0.05). Pancreatic β-cells and tissue pathological examination showed a significant improvement after the treatment period. In addition, the expression of Ngn3, Nkx6.1 and insulin increased in oligosaccharide-treated compared to untreated diabetic rats. Owing to the verified anti-diabetic effects and regenerative potential, isolated oligosaccharide could be considered as the promising drug in the management of diabetes.
Collapse
|
20
|
Endodontic Rotary Systems: Comparison between Gentlefile and Pro Taper Universal for removal of Enterococcus faecalis. J Clin Exp Dent 2020; 15:e277-e280. [PMID: 37152499 PMCID: PMC10155944 DOI: 10.4317/jced.60147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 12/07/2022] [Indexed: 03/08/2023] Open
Abstract
Background As a resistant bacterium species in infected root canals, Enterococcus faecalis needs to be removed in any endodontic treatment. So, we aimed to compare the effectiveness of two rotary systems, Gentlefile and Pro Taper Universal, in removing Enterococcus faecalis (E. faecalis) from the infected root canal system. Material and Methods Forty single-root premolar teeth were collected and randomly divided into two groups: Gentlefile (n=18) and Pro Taper Universal (n=18). In addition, four teeth were used as a negative control. The root canals were prepared and infected with E. faecalis and incubated for 4 weeks. Samples were obtained from the root canal immediately before and after instrumentation. A reduction in bacteria was determined by the colony count method. Results Colony numbers of E. faecalis were significantly different before and after instrumentation in all groups (p<0.001). Furthermore, Gentlefile group illustrated a higher percentage of bacterial reduction (96.1%) compared to Pro Taper Universal group (90%). Accordingly, Gentlefile group was found to be significantly (p<0.001) more effective in decreasing bacterial populations than Pro Taper Universal group. Conclusions Although both rotary systems were highly effective in bacterial reduction from root canals, Gentlefile demonstrated better bacterial reduction percentage from root canals than Pro Taper Universal. Key words:Enterococcus faecalis, Gentlefile, Pro Taper Universal, Rotary systems.
Collapse
|
21
|
Momordica charantia reverses type II diabetes in rat. J Food Biochem 2019; 43:e13021. [PMID: 31441956 DOI: 10.1111/jfbc.13021] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 07/20/2019] [Accepted: 07/23/2019] [Indexed: 11/28/2022]
Abstract
Diabetes, a disease with abnormal production or use of insulin, is a growing concern that affects many individuals globally. Although many attempts have been made, there is no satisfactory treatment for diabetes. Recently, scientists have been exploring a promising treatment of diabetes involving herbal medicine. In this line, we show that Momordica charantia, a tendril-bearing vine belonging to the Cucurbitaceae family, permanently normalizes blood glucose levels comparable to healthy rats. Most importantly, M. charantia increases the expression of Insulin and Pdx1 genes while lowers the expression Glut2. Moreover, the number and size of the pancreatic islets have remarkably increased in treated animals. Liver ALT, AST, and ALP enzyme activities fell into normal range in treated animals suggesting the protective effect of M. charantia. These data indicate that M. Charantia improves the pancreas function by activating pancreatic beta cells and protecting liver tissue. PRACTICAL APPLICATIONS: Owing to the effectiveness of Momordica Charantia extracts in management of diabetes in STZ-induced diabetic rats, we have intention to evaluate the powder of Charantia to discover novel drug for treating diabetes. It is expected that the results could be translated in clinical trials.
Collapse
|
22
|
Cobalt‐Catalyzed Three‐Component Synthesis of Propargylamine Derivatives and Sonogashira Reaction: A Comparative Study between Co‐NPs and Co‐NHC@MWCNTs. ChemistrySelect 2019. [DOI: 10.1002/slct.201803586] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
23
|
039 Y-chromosome abnormalities in men with sub-fertility. An analysis of the frequency of abnormalities and determination of a threshold sperm concentration for genetic analysis. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
24
|
040 A UK multicentre study analysing the surgical sperm retrieval rates in men with non-mosaic Klinefelter's syndrome undergoing mTESE. J Sex Med 2018. [DOI: 10.1016/j.jsxm.2018.04.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
25
|
Abstract
A postoperative complications rate of nearly 50% has compelled oesophago-gastric practice to adopt minimally invasive techniques such as robotic surgery
Collapse
|
26
|
The comparison of the purpose and meaning of life before and after children's cardiac catheterization in parents. ELECTRONIC JOURNAL OF GENERAL MEDICINE 2018. [DOI: 10.29333/ejgm/84945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
Effect of Stevia rebaudiana Bertoni extract on sexual dysfunction in Streptozotocin-induced diabetic male rats. ACTA ACUST UNITED AC 2018; 64:6-10. [PMID: 29433621 DOI: 10.14715/cmb/2018.64.2.2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 11/04/2017] [Accepted: 11/05/2017] [Indexed: 12/31/2022]
Abstract
Stevia rebaudiana Bertoni has been used locally as a non-calorie sweetener in medicine and diabetic diet which claimed to have aphrodisiac properties, although no scientific data of this function have been reported. The aim of this study was to investigate the effect of S. rebaudiana extract on sexual dysfunction, testosterone levels and number of Leydig cells in Streptozotocin (STZ)-induced diabetic male rats. A total of 28 diabetic male rats were randomly divided into 4 groups: diabetic group without any extract and 3 extract groups (5, 50 and 100 mg/kg). Seven normal control rats were treated with vehicle mount latency and frequency of (ML, MF), intromission latency and frequency (IL, IF), ejaculation latency and frequency of (EL, EF), the mount latency post ejaculation (MPE), the intromission latency post ejaculation (ILE), the intromission frequency post ejaculation (IFE) were recorded during 30 min on days 0, 14, 28. The serum testosterone levels, blood glucose, sex organs weight, number of leydig cells and histology of testicular tissue were measured. The stevia group (5 mg/kg) had a significant (p<0.05) increase in EF and IF. The number of Leydig cells in the diabetic group were significantly (p<0.05) reduced compared to the normal group and diabetic groups with extract (5 and 50 mg/kg). The serum testosterone levels and other sexual behaviors did not show any significant differences. The low- dose stevia extract with attention to antioxidant, vasodilator and anti-diabetic properties can be aphrodisiac in STZ- induced diabetic male rats.
Collapse
|
28
|
Combined Phacoemulsification and Ahmed Valve Glaucoma Drainage Implant: A Retrospective Case Series. Eur J Ophthalmol 2018; 18:191-8. [DOI: 10.1177/112067210801800205] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Purpose To report on the efficacy and safety of combined phacoemulsification and an Ahmed valve glaucoma drainage implant with respect to visual acuity improvement, intraocular pressure (IOP) control, and requirement for antiglaucoma medication. Methods A retrospective chart review was conducted of 41 eyes (31 patients) with coexisting visually significant cataracts and uncontrolled glaucoma who had combined phacoemulsification and Ahmed valve implantation. The outcome measures were: visual acuity, IOP, antiglaucoma medication requirements, and intra- and post-operative complications. Success was categorized as absolute (IOPp<21 mmHg without the need for antiglaucoma medication) and relative (IOPp<21 mmHg with one or more antiglaucoma medications). Failure was considered to be an IOPp<6 mmHg or IOP>21 mmHg on maximally tolerated medications or any devastating complication. Results The mean patient age was 67.3±5.9 years old. The mean visual acuity improved from 0.73±0.5 to 0.16±0.16 (p=0.000). The mean IOP decreased from 28.2±3.1 to 16.8±2.1 (p=0.000, 40.4%), while the number of antiglaucoma medication decreased from 2.6±0.66 to 1.2±1.4 (p=0.000). The absolute and relative success rates were 56.1% and 31.7%, respectively; 5 eyes (12.2%) were considered failures. There were no intraoperative complications; postoperative complications occurred in 8 eyes (19.5%). A hypertensive phase was detected in 12 (29.3%) eyes. Conclusions Combined phacoemulsification and Ahmed valve glaucoma drainage implantation is a safe and effective alternative to phacotrabeculectomy in patients with coexisting cataract and refractory glaucoma.
Collapse
|
29
|
Non Invasive Blood Flow Features Estimation in Cerebral Arteries from Uncertain Medical Data. Ann Biomed Eng 2017; 45:2574-2591. [DOI: 10.1007/s10439-017-1904-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 08/12/2017] [Indexed: 11/30/2022]
|
30
|
Determination of fatty acids by high-performance liquid chromatography and fluorescence detection using precolumn derivatization with 9-fluorenylmethyl chloroformate. J LIQ CHROMATOGR R T 2016. [DOI: 10.1080/10826076.2016.1275000] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
31
|
Quantification of sofosbuvir in human serum by liquid chromatography with negative ionization mass spectrometry using the parent peak and its source-induced fragment: Application to a bioequivalence study. J Sep Sci 2016; 39:2702-9. [PMID: 27257162 DOI: 10.1002/jssc.201501375] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 05/08/2016] [Accepted: 05/10/2016] [Indexed: 12/29/2022]
Abstract
In the mass spectrometry of sofosbuvir, a new orally administered antihepatitis C drug, a weak peak is detected at the m/z value of the parent ion (m/z 530) as a result of in-source dissociation and current methods to its quantification, is based on monitoring of the parent peak using ultra high-performance liquid chromatography with tandem mass spectrometry. With these methods serum concentration of the drug is quantifiable only up to 4-5 h postdose. However, the fragmentation of the molecule generates a more stable ion at m/z 287 (base peak) with a signal intensity of about tenfold compared to the parent ion. Our study was aimed to improve sensitivity of analysis by acquisition of the m/z value of the daughter ion from which it originated instead of the parent molecule. This novelty allows us to measure serum concentrations of the drug for a longer time postdose and provides more opportunity for pharmacokinetic studies of sofosbuvir. Our method was linear over the concentration range of 2-2560 ng/mL of sofosbuvir in human serum with a limit of quantification of 2 ng/mL compared to 10 ng/mL reported previously. The coefficient variation values of both inter and intraday analysis were less than 13.8%, and the percentage error was less than 6.3.
Collapse
|
32
|
Antihyperlipidemic Effect of Syrian Mesquite (Prosopis farcta) Root in High Cholesterol Diet-Fed Rabbits. J Evid Based Complementary Altern Med 2016; 21:NP62-6. [PMID: 26800714 DOI: 10.1177/2156587215627552] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 12/08/2015] [Indexed: 11/16/2022] Open
Abstract
Prosopis farcta root has been proposed as an efficacious natural drug for cardiovascular disorders in traditional medicine. The present study evaluates the efficacy of aqueous extract of Prosopis farcta root on experimental atherosclerosis development in rabbits with high cholesterol diet-induced hypercholesterolemia. Serum lipid parameters were significantly increased in the high cholesterol diet groups in comparison with the normal control group (P < .050). Histopathological findings revealed that atheromatous plaques were formed in both thoracic and abdominal aorta of hypercholestrolemic rabbits. Treatment with Prosopis farcta root significantly reduced total cholesterol, triglyceride, high-density lipoprotein, low-density lipoprotein, and very low density lipoprotein levels compared to high cholesterol diet rabbits (P < .050). This finding may reflect a reduction of chest pain or the beneficial effects of this plant root extract on cardiovascular health. The present study can serve as a basis for future investigations on the other effects of this plant on cardiovascular health.
Collapse
|
33
|
Abhängigkeitsphänomene, Aggressivität und Empathie bei exzessiven Nutzern von Computerspielen vom First-Person-Shooter-Typ. SUCHTTHERAPIE 2015. [DOI: 10.1055/s-0035-1564214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
34
|
Is group and save required before laparoscopic appendicectomy? Int J Surg 2015. [DOI: 10.1016/j.ijsu.2015.07.533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
35
|
Predictive Value of the Neutrophil Lymphocyte Ratio in Peritoneal and/or Metastatic Disease at Staging Laparoscopy for Gastric and Oesophageal Adenocarcinoma. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu334.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
36
|
Polymorphism of the IL-18 and CD40 genes and Liver Transplant Outcome in Iranian Patients. Int J Organ Transplant Med 2014; 5:149-54. [PMID: 25426283 PMCID: PMC4243046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
BACKGROUND Cytokines and co-stimulatory molecules are important factors determining the outcome of transplantation. OBJECTIVE To investigate the effect of IL-18 and CD40 gene polymorphisms on the outcome of liver transplantation. METHODS 150 liver transplant recipients were included in this study. Alleles and genotypes frequencies for IL-18 (rs1946519) and CD40 (rs1883832) were determined in 28 acutely rejected (AR group) and 122 non-acutely rejected (non-AR group) liver transplant recipients. IL-18 and CD40 gene polymorphisms were evaluated by PCR-RFLP methods. RESULTS There were no significant associations between IL-18 and CD40 polymorphism with acute rejection in liver transplant patients. IL-18TT and TG genotypes had a significant association with rejection in women compared to men. After grouping the liver recipients according to living vs cadaver donors, a significant association was found between CC genotype of CD40 and rejection in male living donor recipients. IL-18 TG genotype had a significant association with rejection in female cadaver donor recipients. CONCLUSION There is no correlation between all genotype and alleles of IL-80 and CD40 polymorphism and the outcome of liver transplantation. However, gender and type of donor affect the correlation between all genotype and alleles of IL-18 and CD40, and the outcome of liver transplantation.
Collapse
|
37
|
Maladaptive connectivity of Broca’s area in schizophrenia during audiovisual speech perception: An fMRI study. Neuroscience 2013; 253:274-82. [DOI: 10.1016/j.neuroscience.2013.08.041] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 08/18/2013] [Accepted: 08/22/2013] [Indexed: 11/16/2022]
|
38
|
Tracking post-error adaptation in the motor system by transcranial magnetic stimulation. Neuroscience 2013; 250:342-51. [PMID: 23876325 DOI: 10.1016/j.neuroscience.2013.07.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 07/09/2013] [Accepted: 07/11/2013] [Indexed: 11/15/2022]
Abstract
The commission of an error triggers cognitive control processes dedicated to error correction and prevention. Post-error adjustments leading to response slowing following an error ("post-error slowing"; PES) might be driven by changes in excitability of the motor regions and the corticospinal tract (CST). The time-course of such excitability modulations of the CST leading to PES is largely unknown. To track these presumed excitability changes after an error, single pulse transcranial magnetic stimulation (TMS) was applied to the motor cortex ipsilateral to the responding hand, while participants were performing an Eriksen flanker task. A robotic arm with a movement compensation system was used to maintain the TMS coil in the correct position during the experiment. Magnetic pulses were delivered over the primary motor cortex ipsilateral to the active hand at different intervals (150, 300, 450 ms) after correct and erroneous responses, and the motor-evoked potentials (MEP) of the first dorsal interosseous muscle (FDI) contralateral to the stimulated hemisphere were recorded. MEP amplitude was increased 450 ms after the error. Two additional experiments showed that this increase was neither associated to the correction of the erroneous responses nor to the characteristics of the motor command. To the extent to which the excitability of the motor cortex ipsi- and contralateral to the response hand are inversely related, these results suggest a decrease in the excitability of the active motor cortex after an erroneous response. This modulation of the activity of the CST serves to prevent further premature and erroneous responses. At a more general level, the study shows the power of the TMS technique for the exploration of the temporal evolution of post-error adjustments within the motor system.
Collapse
|
39
|
Applicability of LC–MS/MS to optimize derivatization of topiramate with FMOC-Cl using reacted/intact drug ratio. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 928:32-6. [DOI: 10.1016/j.jchromb.2013.02.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 02/25/2013] [Accepted: 02/28/2013] [Indexed: 10/27/2022]
|
40
|
Rapid and sensitive high performance liquid chromatographic determination of zonisamide in human serum application to a pharmacokinetic study. Indian J Pharm Sci 2013; 74:360-4. [PMID: 23626393 PMCID: PMC3630733 DOI: 10.4103/0250-474x.107073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 08/10/2012] [Accepted: 08/16/2012] [Indexed: 11/04/2022] Open
Abstract
An accurate and very rapid method for determination of zonisamide an antiepileptic drug, in human serum is described. The analytical procedure involves liquid-liquid extraction of the analyte and an internal standard (vanillin) from human serum by ethyl acetate as extracting solvent. Chromatographic separation was achieved using a monolithic C18 analytical column and a mixture of 0.05 M phosphate buffer containing triethylamine (1 ml/l; pH 2.7) and methanol (83:17 v/v) was used as the mobile phase. The detection wavelength was set at 240 nm. The calibration curve was linear over a concentration range of 0.015-6.4 μg/ml of zonisamide in human serum. The total run time of analysis was 3.5 min and the lower limits of detection and quantification were 0.005 and 0.015 μg/ml, respectively. The method validation was carried out in terms of specificity, sensitivity, linearity, precision, accuracy and stability. The validated method was applied in a randomised crossover bioequivalence study of two different zonisamide preparations in 24 healthy volunteers, and the assay was sensitive enough to measure drug levels up to 8 days following a single dose administration of zonisamide.
Collapse
|
41
|
Ganglioside Antibodies in Amyotrophic Lateral Sclerosis. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
42
|
Telemedicine: Intercontinental DTI-based management of brain tumor patients. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
43
|
The molecular prevalence of viral infections in transplant candidates with bone marrow suppression, shiraz, southern iran, 2010. Int J Organ Transplant Med 2013; 4:87-94. [PMID: 25013658 PMCID: PMC4089309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Transient bone marrow suppression, characterized by acute inability of the bone marrow to produce circulating blood cells, may strongly relate to the pathogenesis of some viral infections. OBJECTIVE To study the prevalence of some DNA and RNA viruses in patients with transient bone marrow suppression. METHODS EDTA-treated blood samples were collected from 27 patients with clinically- and laboratory-confirmed transient bone marrow suppression. The genomic DNA of hepatitis B virus, adenovirus, polyomavirus BK, and parvovirus B19, and genomic RNA of hepatitis C and G viruses were extracted and amplified by sensitive and specific in-house simple and nested PCR and RT-PCR protocols, respectively. The risk factors that might be related to the studied viral infections were analyzed. RESULTS Hepatitis B virus infection was diagnosed in 9 (33%) of 27 patients; adenovirus infection in 2 (7%); and parvovirus B19 infection in 7 (26%) of 27 patients. The genomic DNA of polyomovirus BK was not detected in any patients. Both hepatitis C and G viruses were found in 3 (11%) of 27 patients. CONCLUSION Diagnosis of the high prevalence of hepatitis B virus, and parvovirus B19 in patients with transient bone marrow suppression, reflects the importance of these viral infections in introducing bone marrow suppression. This hypothesis should be confirmed in further studies.
Collapse
|
44
|
9-Fluorenylmethyl chloroformate as a fluorescence-labeling reagent for derivatization of carboxylic acid moiety of sodium valproate using liquid chromatography/tandem mass spectrometry for binding characterization: A human pharmacokinetic study. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 880:12-8. [DOI: 10.1016/j.jchromb.2011.11.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 10/30/2011] [Accepted: 11/06/2011] [Indexed: 11/27/2022]
|
45
|
Cost-effectiveness of sural nerve biopsies - a single center experience. KLIN NEUROPHYSIOL 2011. [DOI: 10.1055/s-0031-1272706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
46
|
Maladaptive connectivity of broca’s area in schizophrenia during audiovisual speech perception: an FMRI study. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)73216-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
IntroductionNatural speech perception relies on both, auditory and visual information. Both sensory channels provide redundant and complementary information, such that speech perception is enhanced in healthy subjects, when both information channels are present.ObjectivesPatients with schizophrenia have been reported to have problems regarding this audiovisual integration process, but little is known about which neural processes are altered.AimsIn this study we investigated functional connectivity of Broca’s area in patients with schizophrenia.MethodsFunctional magnetic resonance imaging (fMRI) was performed in 15 schizophrenia patients and 15 healthy controls to study functional connectivity of Broca’s area during perception of videos of bisyllabic German nouns, in which audio and video either matched (congruent condition) or die not match (incongruent; e.g. video = hotel, audio = island).ResultsThere were differences in connectivity between experimental groups and between conditions. Broca’s area of the patient group showed connections to more brain areas than the control group. This difference was more prominent in the incongruent condition, for which only one connection between Broca's area and the supplementary motor area was found in control participants, whereas patients showed connections to 8 widely distributed brain areas.ConclusionsThe findings imply that audiovisual integration problems in schizophrenia result from maladaptive connectivity of Broca's area in particular when confronted with incongruent stimuli and are discussed in light of recent audio visual speech models.
Collapse
|
47
|
Application of one-step liquid chromatography–electrospray tandem MS/MS and collision-induced dissociation to quantification of ezetimibe and identification of its glucuronated metabolite in human serum: A pharmacokinetic study. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:2789-95. [DOI: 10.1016/j.jchromb.2010.08.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 07/01/2010] [Accepted: 08/14/2010] [Indexed: 11/24/2022]
|
48
|
S35-3 Detection of upper motor neuron involvement in amyotrophic lateral sclerosis (ALS). Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60217-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
49
|
Functional neuroimaging at different disease stages reveals distinct phases of neuroplastic changes in amyotrophic lateral sclerosis. KLIN NEUROPHYSIOL 2010. [DOI: 10.1055/s-0030-1250904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
50
|
Critical illness neuropathy and myopathy – The effect of endotoxin on sodium channel. KLIN NEUROPHYSIOL 2010. [DOI: 10.1055/s-0030-1250909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|