Abstract:
:BACKGROUND The habit of khat (Catha Edulis Forskal) chewing is widely practiced in the southern regions of Saudi Arabia, Yemen, and East Africa. This social habit has tremendous effects on oral and general health of khat chewers. Khat may affect bacterial species in plaque biofilms on oral rehabilitation materials. This preliminary case-controlled study aimed to assess and compare the effect of khat chewing on bacterial biodiversity between non-khat chewers (NKC) and khat chewers (KC) in oral biofilms on oral rehabilitation materials using polymerase chain reaction (PCR). MATERIAL AND METHODS Fifty participants were organized into 2 equal groups of NKC and KC, each containing 5 subgroups related to filling material type. Some participants had amalgam (A) or composite (C) restorations, while others had feldspathic porcelain (FP), nickel chromium (NC), and zirconia ceramic (ZC) crowns or bridges. Oral biofilm samples were collected from all participants, DNA was extracted, and samples were subjected to PCR. Bacterial species were then identified and counted. PCR products were sequenced to detect similarity. Partial 16S rRNA gene sequences of the current study samples were compared with 16S rRNA gene sequences from GenBank using BLAST on the National Center for Biotechnology Information website. RESULTS The Streptococcus sp. was the most common bacterial species among our participants (40; 80%), followed by Lactobacillus and Veillonella spp., accounting for 12% (6) and 8% (4), respectively. Streptococcus sp. was observed equally among NKC and KC, but Lactobacillus and Veillonella spp. were higher in KC and NKC, respectively. Lactobacillus was associated mainly with prosthetic materials, and Streptococcus was found among all examined dental restorative materials. CONCLUSIONS This research concluded that khat chewing significantly affects bacterial biodiversity in oral biofilms in the presence of different restorative and prosthetic dental materials.
journal_name
Med Sci Monitjournal_title
Medical science monitor : international medical journal of experimental and clinical researchauthors
Al Moaleem MM,Porwal A,Al Ahmari NM,Shariff M,Homeida H,Khalid Adoi
10.12659/MSM.918219subject
Has Abstractpub_date
2020-01-20 00:00:00pages
e918219eissn
1234-1010issn
1643-3750pii
918219journal_volume
26pub_type
杂志文章abstract::BACKGROUND Epithelial ovarian cancer (EOC) has a high mortality rate and is a common malignant tumor of women, seriously impairing health. Chemoresistance is one of the major causes of poor prognosis. Therefore, analyzing the molecular mechanism of paclitaxel resistance has great significance. MATERIAL AND METHODS We ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.910932
更新日期:2018-12-06 00:00:00
abstract::BACKGROUND Repetition disorder can be used as an important criterion for aphasia classification, and damaged arcuate fasciculus in the dominate hemisphere has been reported to be closely related to repetition disorder, but the underlying neurological mechanism remains unclear. MATERIAL AND METHODS Fifteen stroke patie...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.928702
更新日期:2020-12-05 00:00:00
abstract::BACKGROUND Hypertonic saline (HS) has been successfully used for treatment of various forms of brain edema. Decreased expression of aquaporin (AQP)4 and pro-inflammatory cytokines such as tumor necrosis factor (TNF)-a and interleukin (IL)-1b have been linked to edema pathogenesis. This study examined the effect of 3% ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.907212
更新日期:2018-03-30 00:00:00
abstract:BACKGROUND:The aim of this study was to investigate the protective effects of L-glutamine (GLN) against liver and kidney injury caused by acute toxicity of deltamethrin (DLM). MATERIAL AND METHODS:Thirty-two rats were indiscriminately separated into 4 groups with 8 rats each: control group (distilled water; 10 ml/kg, ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.893180
更新日期:2015-04-19 00:00:00
abstract:BACKGROUND:Freezing of Gait (FOG) can be a serious problem in Parkinson's disease (PD) and is usually refractory to medical treatment. Botulinum toxin (BTX) type A has been reported to relieve FOG in small open label studies. MATERIAL/METHODS:We performed a double-blind, placebo-controlled, parallel-group study using ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:2004-07-01 00:00:00
abstract:BACKGROUND:Factor XIII deficiency is a rare inherited bleeding disorder that is often difficult to diagnose. As there are no standard screening tests established patients with Factor XIII deficiency are not correctly identified. Especially postoperative bleeding and haemorrhage after difficult plastic reconstructive op...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,评审
doi:
更新日期:2009-01-01 00:00:00
abstract:BACKGROUND:This study aimed to determine the efficacy and safety of recombinant Mycobacterium tuberculosis ESAT-6 protein for diagnosis of pulmonary tuberculosis (TB). MATERIAL AND METHODS:A phase II trial was performed in 158 patients with pulmonary TB (145 initially-treated and 13 re-treated) and 133 healthy subject...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.889425
更新日期:2013-11-12 00:00:00
abstract:BACKGROUND:High-frequency oscillations (ripples) are proposed to be involved in memory consolidation. Ripple oscillations persist in the absence of chemical synaptic transmission and inhibitors of gapjunctions were shown to block high-frequency oscillations in hippocampal slices. In this study we investigated the effec...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2005-03-01 00:00:00
abstract::So far the treatment of chronic hepatitis B has been based on the use of numerous agents, particularly interferon alpha which proved the most effective. Attempts are made to introduce new therapeutic methods (antiviral agents--nucleoside analogues, immunotherapy--anti HBV vaccine, gene therapy) in order to obtain high...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,评审
doi:
更新日期:2000-01-01 00:00:00
abstract::BACKGROUND Nasopharyngeal carcinoma (NPC) is a common malignancy in South-East Asia. NPC is characterized by distant metastasis and poor prognosis. The pathophysiological mechanism of nasopharyngeal carcinoma is unknown. This study aimed to identify the crucial miRNAs in nasopharyngeal carcinoma and their target genes...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.896047
更新日期:2016-06-28 00:00:00
abstract::BACKGROUND The aim of this study was to analyze the relative expression level of miR-30d-5p, miR-23a-3p, and miR-146a-5p, and to comprehensively assess the diagnostic and predictive possibilities of these miRNAs. Their expression changes have not yet been sufficiently investigated during acute myocardial infarction. T...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.913743
更新日期:2019-05-27 00:00:00
abstract::BACKGROUND Postextubation distress is detrimental to the prognosis of critically ill patients with successful spontaneous breathing trial. The known risk factors of failed weaning are associated with the heart, lungs, and diaphragm. The aim of this study was to explore the role of a combined model including indicators...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.924885
更新日期:2020-08-08 00:00:00
abstract::BACKGROUND Several studies have indicated that interleukin (IL)-1β-511 C/T polymorphism may contribute to individual susceptibility to gastric cancer, but the results vary among regions and races. No relevant meta-analysis has been conducted in a Chinese population. Therefore, we performed the current meta-analysis to...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章,meta分析
doi:10.12659/msm.895771
更新日期:2016-05-24 00:00:00
abstract:BACKGROUND:The aim of this study was to investigate susceptibility-weighted imaging (SWI) signal changes in different brain regions in a rabbit model of acute hemorrhagic anemia. MATERIAL/METHODS:Ten New Zealand white rabbits were used for construction of the model of acute hemorrhagic anemia. Signal intensities of SW...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.890641
更新日期:2014-07-25 00:00:00
abstract::Writing and reading 'Discussion' sections in medical articles require a procedure as exact and structured as that involved in raising questions, choosing materials and methods and producing results for a health research study. The medical article as a whole can be considered an exercise in modern argumentation and its...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2006-06-01 00:00:00
abstract::BACKGROUND We studied the effect of APOBEC3G on persistent human papillomavirus (HPV) infection and the correlation between APOBEC3G polymorphism and HPV persistent infection and cervical disease progression in Uygur women in China. MATERIAL AND METHODS From January 2015 to December 2017, we enrolled 529 Uygur ethnic ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.916142
更新日期:2019-09-17 00:00:00
abstract::BACKGROUND lncRNA BANCR participates in the pathogenesis of various types of human diseases; however, its involvement in diabetic retinopathy is unknown. MATERIAL AND METHODS In this study, the expression of lncRNA BANCR in plasma of patients with diabetic retinopathy, diabetic patients without complications, and heal...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.913359
更新日期:2019-04-18 00:00:00
abstract:BACKGROUND:The aim of this study was to explore the effects of different tidal volume (VT) ventilation on paraquat-induced acute lung injury or acute respiratory distress syndrome (ALI/ARDS) in piglets. MATERIAL AND METHODS:We developed ALI/ARDS models in piglets by intraperitoneal injection of paraquat (PQ). The pigl...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.893179
更新日期:2015-02-11 00:00:00
abstract:BACKGROUND:Recombinant human activated protein C (drotrecogin alfa [activated]--DAA) demonstrated in Phase III controlled clinical studies significant reduction of mortality in patients with severe sepsis and high risk of death. The aim of the study was to assess the therapeutic efficacy of DAA in patients included in ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2006-03-01 00:00:00
abstract::BACKGROUND Predicting the occurrence of severe postreperfusion syndrome (PRS) is clinically challenging. We investigated whether the flushed fluid potassium concentration (FFK) was associated with severe PRS in deceased donor liver transplantation (DDLT). MATERIAL AND METHODS Forty adult DDLT recipients were enrolled ...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.907132
更新日期:2017-10-29 00:00:00
abstract:BACKGROUND:Children with hydrocephalus and increased intracranial pressure are treated with ventricular shunts. Multiple head CT is used to assess shunt malfunction and changes in ventricular size (volume). Because of the naturally high contrast of the head structures in CT imaging, a low-dose protocol for hydrocephali...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2007-05-01 00:00:00
abstract::BACKGROUND Levetiracetam (LEV) is an antiepileptic drug that promotes recovery of neurological function by alleviating inflammatory reactions. However, it is not known whether it can improve secondary brain injury after intracerebral hemorrhage (ICH). The aim of this study was to determine whether LEV can reduce early...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.922741
更新日期:2020-04-14 00:00:00
abstract::BACKGROUND Our objective was to explore a synthetic alginate hydrogel delivery system for the delivery of demineralized bone matrix (DBM) particles for bone graft substitutes. MATERIAL AND METHODS The physiochemical properties of surface morphology, porosity measurements, in vitro degradation, equilibrium swelling, an...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.928617
更新日期:2021-01-22 00:00:00
abstract::BACKGROUND Long non-coding RNAs (lncRNAs) have been implicated in various human cancer types. However, the underlying mechanisms involved in hepatocellular carcinoma (HCC) progression remain poorly understood. MATERIAL AND METHODS In this study, lncRNA array was used to identify HCC related lncRNAs. RNA immunoprecipit...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/MSM.911179
更新日期:2018-11-25 00:00:00
abstract:BACKGROUND:Cigarette smoke (CS) is associated with oxidative stress in several organs because it contains high concentrations of free radicals and reactive oxygen species. Experimental models, using different strains, provide important insights into the genetic basis of diseases. This study sought to identify, in diffe...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2010-07-01 00:00:00
abstract::BACKGROUND In this study we investigated changes in the status of antibiotic use in Tianjin since the implementation of the Antibiotic Stewardship Program (ASP) (2011-2013), as well as existing problems, strategies, and outcomes to promote rational clinical antibiotic use. MATERIAL AND METHODS A quasi-experimental stu...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.899848
更新日期:2017-02-09 00:00:00
abstract:BACKGROUND:There is evidence that myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is characterized by activation of immune, inflammatory, oxidative and nitrosative stress (IO&NS) pathways. The present study was carried out in order to examine whether ME/CFS is accompanied by increased levels of plasma perox...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.881699
更新日期:2011-04-01 00:00:00
abstract::BACKGROUND This study aimed to uncover the molecular mechanisms underlying mild and severe pneumonia by use of mRNA sequencing (RNA-seq). MATERIAL AND METHODS RNA was extracted from the peripheral blood of patients with mild pneumonia, severe pneumonia, and healthy controls. Sequencing was performed on the HiSeq4000 p...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:10.12659/msm.900782
更新日期:2017-04-06 00:00:00
abstract:BACKGROUND:An emerging body of literature has recently defined a reduced risk of cancer following the use of nonsteroidal anti-inflammatory drugs (NSAIDs), which are generally able to exert an apoptotic property and inhibitory effects on the activity and/or expression of matrix metalloproteinases (MMPs). This study was...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2004-10-01 00:00:00
abstract:BACKGROUND:Active immunization techniques against exogenous source antigens (ags - such as bacteria, virus) proved to be successful in preventing many acute infectious diseases from occurring in a susceptible population. However, an active immunization technique that could be employed both prophylactically and therapeu...
journal_title:Medical science monitor : international medical journal of experimental and clinical research
pub_type: 杂志文章
doi:
更新日期:2007-05-01 00:00:00