scholarly journals Presence of pepsin in laryngeal tissue and saliva in benign and malignant neoplasms

2020 ◽  
Vol 40 (11) ◽  
Author(s):  
Željko Zubčić ◽  
Tihana Mendeš ◽  
Andrijana Včeva ◽  
Hrvoje Mihalj ◽  
Vjeran Bogović ◽  
...  
Keyword(s):  
Case Control Study ◽  
Laryngopharyngeal Reflux ◽  
Laryngeal Neoplasms ◽  
Enzyme Linked Immunosorbent Assay ◽  
Malignant Neoplasms ◽  
Control Subjects ◽  
Malignant Lesions ◽  
Tumor Biopsies ◽  
Control Study

Abstract Objectives: The current study was performed to determine the presence of pepsin in saliva and laryngeal tissue among participants with benign and malignant laryngeal neoplasms. Study design: Case–control study included three groups of patients with: (1) benign laryngeal neoplasms, (2) malignant laryngeal neoplasms and (3) control subjects without symptoms or signs of laryngopharyngeal reflux (LPR). Methods: Eighty-one voluntary participants were included into study. They were recruited from a group of patients with histologically proven benign and malignant laryngeal neoplasms and in case of control subjects among patients with nasal septum deformation without symptoms of LPR. Morning saliva samples were collected preoperatively. Tumor biopsies were collected by directoscopy of larynx and the control samples from interarytenoid unit of larynx. All samples were analyzed by Enzyme-Linked Immunosorbent Assay (ELISA) and Immunohistochemistry. Results: Pepsin was found in all samples of saliva and tissue biopsies in groups with malignant and benign neoplasms. The highest concentration of pepsin was found in a group of patients with malignant laryngeal neoplasms. Patients with benign laryngeal neoplasms had lower concentrations and the control subjects presented with the lowest concentration of pepsin measured from their saliva. Differences were not statistically significant. Immunohistochemical (IHC) analysis showed the largest number of high positive samples in the group of malignant lesions. Conclusion: These results suggest that pepsin and LPR can contribute to the development of benign and malignant laryngeal neoplasms. Further prospective studies, with far more patients, are necessary to prove the role of pepsin in multifactorial etiology of laryngeal neoplasms.

scholarly journals Case-Control Study to Assess the Association between Epilepsy and Toxocara Infection/Exposure

2021 ◽  
Vol 9 (10) ◽  
pp. 2091
Author(s):  
Ali Alizadeh Khatir ◽  
Mahdi Sepidarkish ◽  
Mohammad Reza Rajabalizadeh ◽  
Solmaz Alizadeh Moghaddam ◽  
Saeed Aghapour ◽  
...  
Keyword(s):  
Risk Factor ◽  
Case Control Study ◽  
Serum Antibody ◽  
Multivariate Logistic Regression Analysis ◽  
Case Control ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Subjects ◽  
Epileptic Patients ◽  
Incident Cases ◽  
Control Study

Although causes and etiology of epilepsy are mostly obscure, some zoonotic parasites, such as Toxocara species, have been proposed as a risk factor for this disease. Here, we conducted an age-matched case-control study to evaluate whether there is an association between epilepsy and the presence of serum antibodies to Toxocara in incident cases. We included 94 idiopathic epileptic patients as cases, and—from the same geographical region—88 people with no own history of epilepsy or neurological disease as control subjects. Epilepsy was confirmed by a physician using the International League Against Epilepsy (ILAE) definition. All participants were screened for the anti-Toxocara IgG serum antibody by enzyme-linked immunosorbent assay (ELISA). Univariate and mutltivariate statistical analyses were applied to calculate the crude and adjusted odds ratios (OR) and 95% confidence intervals (CIs). Anti-Toxocara serum antibody was detected in 37 epileptic patients and in 23 control subjects, giving respective seroprevalences of 39.3% (95% CI, 29.4–49.9%) and 26.1% (95% CI, 17.3–36.5%), respectively. Adjusted multivariate logistic regression analysis estimated an OR of 2.38 (95% CI, 1.25–4.63), indicating a significant association between epilepsy and Toxocara seropositivity. There was also a significant association between seropositivity to Toxocara and partial (OR, 2.60; 95% CI, 1.14–6.04) or generalized (OR, 2.17; 95% CI, 1.09–4.40%) seizures. Findings from the present study of incident epileptic cases support previous studies proposing that Toxocara infection/exposure is a risk factor for epilepsy. However, further well-designed population-based surveys and mechanistic/experimental studies in animal models are required to better understand the reason(s) for this association.

scholarly journals ASSOCIATION OF VITAMIN D LEVEL AND VITAMIN D RECEPTOR A-1012G POLYMORPHISM WITH PSORIASIS – CASE CONTROL STUDY

2020 ◽  
Vol 3 (1) ◽  
pp. 4-13
Author(s):  
Pocut Astari ◽  
Yahwardiah Siregar ◽  
Ariyati Yosi
Keyword(s):  
Vitamin D ◽  
Young Adult ◽  
Vitamin D Receptor ◽  
Adult Female ◽  
Case Control Study ◽  
Case Control ◽  
Enzyme Linked Immunosorbent Assay ◽  
Plasma Vitamin ◽  
Control Subjects ◽  
Control Study

Background: Psoriasis is a chronic inflammation of the skin caused by combination of genetic, immune and environmental factors. The Vitamin D receptors alongside with plasma vitamin D (25(OH)D) level have known to be related with psoriasis. Vitamin D receptor polymorphism is one of the multiple polymorphisms that predispose individuals to several diseases. It is possible that this polymorphism is different among psoriatic patients and healthy one particularly in Medan, Indonesia population.  Objective: We aimed to investigate associations between plasma level of 25(OH)D and one VDR gene polymorphism (A-1012G) with psoriasis.Methods: Fourty four psoriatic patients and 44 healthy control subjects’ DNA samples were obtained in this case control study and genotyped for A-1012G polymorphism by Polymerase Chain Reaction (PCR). The plasma vitamin D (25(OH)D) level of case and control subjects were examined using Enzyme Linked Immunosorbent Assay (ELISA).Results: Significant lower plasma 25(OH)D levels were found in control group (p<0.001) which consist of mostly young adult female. There is no significant relationship between AA, AG and GG genotype variances of A-1012G polymorphism with psoriasis (p=0.124).Conclusion: No significant association found between A-1012G polymorphism and psoriasis but there was a significant difference found between vitamin D level and psoriasis (p<0.001).  From this study, vitamin D deficiency were more common in young adult female

scholarly journals The Probable Association between Chronic Toxoplasma gondii Infection and Type 1 and Type 2 Diabetes Mellitus: A Case-Control Study

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Shahrzad Soltani ◽  
Sanaz Tavakoli ◽  
Mohamad Sabaghan ◽  
Mehdi Sagha Kahvaz ◽  
Marzieh Pashmforosh ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Toxoplasma Gondii ◽  
Case Control Study ◽  
Case Control ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Control Subjects ◽  
And Control ◽  
Control Study

Purpose. The probable association between Toxoplasma gondii (T. gondii) infection and diabetes mellitus (DM) is still controversial, and there are several studies with conflicting results. Thus, this study was performed to assess the possible association between chronic T. gondii infection and type 1 diabetes mellitus (T1DM) and T2DM. Methods. In this case-control study, a total of 105 diabetic subjects including 36 patients with T1DM and 69 patients with T2DM were recruited. In addition, 150 nondiabetic subjects were enrolled as controls. Each case group had its own control group. Each participant completed a structured questionnaire obtaining demographic information. Serum samples were examined for T. gondii-specific IgG antibody using enzyme-linked immunosorbent assay (ELISA) method. Results. Analysis revealed that 69.4% and 34.0% of patients with T1DM and control subjects were serologically positive for T. gondii, respectively (odds ratio (OR): 4.41; 95% confidence interval (CI): 1.75–11.06; P = 0.001 ). Moreover, 72.5% of T2DM patients and 29.0% of healthy individuals were seropositive for T. gondii (OR: 6.44; 95% CI: 3.25–12.74; P < 0.001 ). Among risk factors, only contact with cats was significantly associated with IgG seroprevalence in both T2DM patients ( P < 0.001 ) and control subjects ( P = 0.045 ). Conclusion. Although the results showed that chronic T. gondii infection is significantly associated with T1DM and T2DM, there remain many questions regarding the exact mechanisms of T. gondii in the pathogenesis of DM.

scholarly journals Diagnostic utility of a Ferritin-to-Procalcitonin Ratio to differentiate patients with COVID-19 from those with Bacterial Pneumonia: A multicenter study

2021 ◽  
Author(s):  
Amal A Gharamti ◽  
Fei Mei ◽  
Katherine C Jankousky ◽  
Jin Huang ◽  
Peter Hyson ◽  
...  
Keyword(s):  
Bacterial Pneumonia ◽  
Operating Characteristic ◽  
Case Control Study ◽  
Receiver Operating Characteristic Analysis ◽  
Similar Proportion ◽  
Characteristic Analysis ◽  
Multivariable Analyses ◽  
Prevalence Of Diabetes Mellitus ◽  
Control Study

Abstract Background There is an urgent need for accurate, rapid, inexpensive biomarkers that can differentiate COVID-19 from bacterial pneumonia. We assess the role of the ferritin-to-procalcitonin (F/P) ratio to classify pneumonia cases into those due to COVID-19 or due to bacterial pathogens. Methods This multicenter case-control study compared patients with either COVID-19 and bacterial pneumonia, admitted between March 1 and May 31, 2020. Patients with COVID-19 and bacterial pneumonia co-infection were excluded. The F/P in patients with COVID-19 or with bacterial pneumonia were compared. Receiver operating characteristic analysis determined the sensitivity and specificity of various cut-off F/P values for COVID-19 versus bacterial pneumonia. Results A total of 242 COVID-19 pneumonia cases and 34 bacterial pneumonia controls were included. Patients with COVID-19 pneumonia had a lower mean age (57.11 vs 64.4 years, p=0.02) and a higher BMI (30.74 vs 27.15 kg/m 2, p=0.02) compared to patients with bacterial pneumonia. Cases and controls had a similar proportion of women (47% vs 53%, p=0.5) and COVID-19 patients had a higher prevalence of diabetes mellitus (32.6% vs 12%, p=0.01). The median F/P was significantly higher in patients with COVID-19 (4037.5) compared to the F/P in bacterial pneumonia (802, p&lt;0.001). An F/P ≥ 877 used to diagnose COVID-19 resulted in a sensitivity of 85% and a specificity of 56%, with a positive predictive value of 93.2%, and a likelihood ratio of 1.92. In multivariable analyses, an F/P ≥ 877 was associated with greater odds of identifying a COVID-19 case (OR: 11.27, CI: 4-31.2, p&lt;0.001). Conclusion An F/P ≥ 877 increases the likelihood of COVID-19 pneumonia compared to bacterial pneumonia.

scholarly journals Gly972Arg Variant of Insulin Receptor Substrate 1 Gene and Colorectal Cancer Risk in Overweight/Obese Subjects

2016 ◽  
Vol 31 (1) ◽  
pp. 68-72 ◽  
Author(s):  
Touraj Mahmoudi ◽  
Keivan Majidzadeh-A ◽  
Khatoon Karimi ◽  
Hamid Farahani ◽  
Reza Dabiri ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Insulin Receptor ◽  
Case Control Study ◽  
Insulin Receptor Substrate ◽  
Protective Effects ◽  
Insulin Receptor Substrate 1 ◽  
Pcr Rflp ◽  
Obese Subjects ◽  
Control Study

Background Given the major role of obesity and insulin resistance (IR) in colorectal cancer (CRC), we investigated whether genetic variants in ghrelin ( GHRL), resistin ( RETN) and insulin receptor substrate 1 ( IRS1) were associated with CRC risk. Methods This study was conducted as a case-control study, and 750 subjects, including 438 controls and 312 patients with CRC, were enrolled and genotyped using the PCR-RFLP method. Results No significant differences were observed for GHRL (rs696217), RETN (rs3745367) and IRS1 (rs1801278, Gly972Arg or G972R) gene variants between the cases and controls. However, the IRS1 G972R R allele compared with the G allele and the G972R RR+GR genotype compared with the GG genotype appeared to be markers of decreased CRC susceptibility in the overweight/obese subjects (p = 0.024; odds ratio [OR] = 0.42, 95% confidence interval [95% CI], 0.20-0.91; and p = 0.048; OR = 0.42, 95% CI, 0.17-0.99, respectively). Furthermore, the R allele and RR+GR genotype were also associated with decreased risks for obesity in the patients with CRC (p = 0.007; OR = 0.35, 95% CI, 0.15-0.77; and p = 0.015; OR = 0.35, 95% CI, 0.15-0.72, respectively). Conclusions In accordance with previous studies, our findings suggest that the IRS1 G972R R allele and RR+GR genotype have protective effects for CRC in overweight/obese patients and for obesity in patients with CRC. Nevertheless, further studies are required to confirm these findings.

scholarly journals Anti-CCP Antibody Levels Are Not Associated with MS: Results from a Case-Control Study

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Mahmut Alpayci ◽  
Aysel Milanlioglu ◽  
Veysel Delen ◽  
Mehmet Nuri Aydin ◽  
Huseyin Guducuoglu ◽  
...  
Keyword(s):  
Case Control Study ◽  
Critical Role ◽  
Positive Association ◽  
Case Control ◽  
Enzyme Linked Immunosorbent Assay ◽  
Healthy Controls ◽  
Citrullinated Proteins ◽  
Antibody Levels ◽  
Citrullinated Peptide ◽  
Control Study

Citrullinated proteins have been suggested to play a critical role in the pathogenesis of multiple sclerosis (MS). Anticyclic citrullinated peptide (anti-CCP) antibody is used in the early diagnosis of rheumatoid arthritis (RA). The objective of this study was to investigate the presence of anti-CCP antibody in patients with MS compared to RA patients and healthy controls. Fifty patients with MS (38 females, 12 males; mean age 36.72 ± 8.82 years), 52 patients with RA (40 females, 12 males; mean age 40.87 ± 10.17 years), and 50 healthy controls (32 females, 18 males; mean age 38.22 ± 11.59 years) were included in this study. The levels of serum anti-CCP antibody were measured using an enzyme-linked immunosorbent assay (ELISA). The results of the study showed that anti-CCP antibody levels were significantly higher in RA patients versus MS or healthy controls(P<0.001). Moreover, anti-CCP antibody was positive in 43 (83%) patients with RA, while it was negative in all MS patients as well as in all healthy controls. Also, no significant correlation was found between the anti-CCP levels and EDSS scores(r=-0.250). In conclusion, the results of this study did not support a positive association between serum anti-CCP antibody and MS.

scholarly journals P2-233: The role of hippocampal atrophy for the differentiation between MCI subtypes: Results of a case-control study

2012 ◽  
Vol 8 (4S_Part_9) ◽  
pp. P341-P341
Author(s):  
Martha Dlugaj ◽  
Christoph Mönninghoff ◽  
Hans-Jürgen Huppertz ◽  
Isabel Wanke ◽  
Daniel Jokisch ◽  
...  
Keyword(s):  
Case Control Study ◽  
Case Control ◽  
Hippocampal Atrophy ◽  
Control Study

scholarly journals Results from an International Case-Control Study of Childhood Brain Tumors: The Role of Prenatal Vitamin Supplementation

1998 ◽  
Vol 106 ◽  
pp. 887 ◽  
Author(s):  
Susan Preston-Martin ◽  
Janice M. Pogoda ◽  
Beth A. Mueller ◽  
Flora Lubin ◽  
Baruch Modan ◽  
...  
Keyword(s):  
Brain Tumors ◽  
Case Control Study ◽  
Case Control ◽  
Vitamin Supplementation ◽  
Childhood Brain Tumors ◽  
Control Study
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