Masoud Youssefi; Golsa Teimouri; Farnaz Zahedi Avval; kiarash ghazvini; Masoud Keikha
Abstract
The aim of this study was to determine the serum levels of ST2 protein and interleukin-33 in patients affected to tuberculosis and compare them with the control group. In the present study, at first 30 patients affected to TB were randomly selected and 52 healthy individuals, who were matched with respect ...
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The aim of this study was to determine the serum levels of ST2 protein and interleukin-33 in patients affected to tuberculosis and compare them with the control group. In the present study, at first 30 patients affected to TB were randomly selected and 52 healthy individuals, who were matched with respect to their age and gender, included in the study as the control group. After that, the serum levels of sST2 and IL33 were measured by ELISA sandwich method using commercial Quantikine Human ELISA kit (R&D Systems). The data were finally analyzed by SPSS software. IL-33 levels in the TB group were higher than the healthy controls and a statistically significant difference was observed in the IL-33 levels between the two groups (P = 0.021). Moreover, IL-33R (ST2) was slightly increased in the TB patients compared to the healthy controls, although statistical analysis showed no significant difference between the two groups (P = 0.083). Regarding the high normal variation of sST2 and the limitations of the present study, it is recommended that future studies of sST2 be performed in with higher number of TB patients.
kiarash ghazvini; Masoud Youssefi; Masoud Keikha
Abstract
Introduction: Tuberculosis is remained as global challenge which is considered as the top cause of human death in worldwide. The presence of lower respiratory tracts microflora can modulate immune response and play important role in susceptibility to TB. The aim of study was comparison ...
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Introduction: Tuberculosis is remained as global challenge which is considered as the top cause of human death in worldwide. The presence of lower respiratory tracts microflora can modulate immune response and play important role in susceptibility to TB. The aim of study was comparison of microbial diversity in lower respiratory tracts microflora of pulmonary tuberculosis patinas and healthy individuals. Methods: In this study, the raw sequences of SRR493275 and SRR493275 were retrieved from European Bioinformatics Institute online database. Then, the raw sequences were filtered by their quality (adapter contamination, low quality as well as low complexity reads) and taxonomic analyzed by online websites including Galaxy/CRS4 and KAIJU online servers. The statistical analysis was conducted to evaluate the presence of significant microbial diversity between two groups. Results: We found that microbial taxa were similar between TB and normal except Tenericutes which supplemented in microflora of pulmonary tuberculosis cases. Moreover, the abundance of bacterial genera is significantly divers between TB and healthy groups. Conclusion: There is significant diversities in the lower respiratory tracts microflora of TB and controls. Increasing the abundance of anaerobic genera in TB patients may be suppressed immune response and essential for susceptibility to active pulmonary tuberculosis.
kiarash ghazvini; Masoud Youssefi; Masoud Keikha
Abstract
Abstract Helicobacter pylori is one of the most common bacteria in the stomach, colonizing about one-half of the population in the world, while most of them remain asymptomatic throughout their lives and gastric cancer (GC) occurs in only 1-2% of people. It seems that the final outcomes of Helicobacter ...
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Abstract Helicobacter pylori is one of the most common bacteria in the stomach, colonizing about one-half of the population in the world, while most of them remain asymptomatic throughout their lives and gastric cancer (GC) occurs in only 1-2% of people. It seems that the final outcomes of Helicobacter pylori infection are dependent on bacterial virulence factors, host genetic characteristics, and the environmental conditions. In this study, we compared the expression of 20 known virulence factors associated with the development of GC in the isolated Helicobacter pylori strains from the Colombian patients belonging to the regions with low and high GC risks. Based on the results of the present study, it was found that the 20 studied virulence factors are closely related with each other and regulate their expressions through the required intermediates. We also showed that the Helicobacter pylori strains belonging to the region with high GC risk were more virulent and have developed into GC by destroying the intercellular bindings, cell skeletal dysregulation, and cell survival and proliferation stimulation, while the H. pylori strains in the region with low GC risk expressed virulence factors related to the chronic inflammation and apoptosis; adhesion factors were also different in both groups.
Masoud Youssefi; Majid Eslami; Mohsen Karbalaei; Masoud Keikha; Kiarash Ghazvini
Abstract
Cancer is defined as uncontrolled cell division, which could spread or invade various tissues. There are more than 200 types of cancer, including breast, skin, lung, colon, and prostate cancer, and lymphoma, the symptoms and indications of which vary depending on the type of tissues. Cancer has several ...
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Cancer is defined as uncontrolled cell division, which could spread or invade various tissues. There are more than 200 types of cancer, including breast, skin, lung, colon, and prostate cancer, and lymphoma, the symptoms and indications of which vary depending on the type of tissues. Cancer has several treatments with different applications. For instance, chemotherapy, radiation therapy, surgery or their combination are common treatment modalities for cancer. However, a complete cure for cancer has not been achieved yet. On the other hand, novel drugs for cancer treatment are not efficient due to the ability of cancer cells to develop resistance against chemotherapeutic agents. Recently, natural compounds have been reported to improve the efficiency of cancer treatment. Polyunsaturated fatty acids (PUFAs) are natural compounds that could be used as dietary supplements in cancer patients. PUFAs are classified into two main categories, including n-3 and n-6 PUFAs. According to the literature, n-3 PUFAs exert protective effects against cancer through the induction of apoptotic pathways and suppressing cell proliferation, while n-6 PUFAs cause tumor formation by inducing cell growth and proliferation. Using PUFAs in combination with chemotherapeutic agents is considered to be an effective approach to the treatment of cancer patients through increasing cancer cell death. This review aimed to discuss the interactive effects of the structure and function of PUFAs on cancer and cell processes through various signaling pathways.
Kiarash Ghazvini; Shamsoddin Mansouri; Mohammad-Taghi Shakeri; Masoud Youssefi; Mohammad Derakhshan; Masoud Keikha
Abstract
Introduction: Tuberculosis (TB) is a chronic bacterial disease and a leading cause of mortality among single-agent infectious diseases following the human immunodeficiency virus infection across the world. Logistic regression is a method of statistical analysis with predictive capability. This multivariate ...
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Introduction: Tuberculosis (TB) is a chronic bacterial disease and a leading cause of mortality among single-agent infectious diseases following the human immunodeficiency virus infection across the world. Logistic regression is a method of statistical analysis with predictive capability. This multivariate statistical method could be used to evaluate the correlations between independent variables (albeit confounding) and a dependent variable. The present study aimed to assess the influential factors in the incidence of TB based on the estimations of a logistic regression predictive model.Methods: This cross-sectional study was conducted on two groups consisting of 189 TB patients and 189 controls. The influential factors in TB were compared between the groups, including age, gender, marital status, risk of acquired immunodeficiency syndrome (AIDS), smoking habits, history of asthma, organ transplantation, body mass index (BMI), vitamin D3 level, diabetes, and rate of hemoglobin and malignant diseases. In addition, the predictive potential of the logistic regression model was determined based on various indices, such as sensitivity, specificity, and receiver operating characteristic (ROC) curve. Results: The sensitivity and specificity of the regression model were estimated at 78% and 68%, respectively, and the area under the ROC curve was calculated to be 0.821. Among the available influential factors in the dependent variable (i.e., TB), the variables of vitamin D3 and hemoglobin levels and BMI were considered significant. Conclusion: According to the results, the logistic regression model is appropriate for the prediction of TB considering the accuracy and predictive power of its criteria, as well as the area under the ROC curve (0.821), which could provide the test accuracy for the diagnosis TB.
Kobra Salimiyan Rizi; Hadi Farsiani; Kiarash Ghazvini; Masoud Youssefi
Abstract
Rothia dentocariosa (R. dentocariosa) is a gram-positive bacterium, which is a microorganism that normally resides in the mouth and respiratory tract. R. dentocariosa is known to involve in dental plaques and periodontal diseases. However, it is considered an organism with low pathogenicity and is associated ...
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Rothia dentocariosa (R. dentocariosa) is a gram-positive bacterium, which is a microorganism that normally resides in the mouth and respiratory tract. R. dentocariosa is known to involve in dental plaques and periodontal diseases. However, it is considered an organism with low pathogenicity and is associated with opportunistic infections. Originally thought not to be pathogenic in humans, R. dentocariosa was first described to cause infections in a 19-year-old female with periappendiceal abscess in 1975. The most prevalent human infections caused by R. dentocariosa include infective endocarditis, bacteremia, endophthalmitis, corneal ulcer, septic arthritis, pneumonia, and peritonitis associated with continuous ambulatory peritoneal dialysis. Three main factors have been reported to increase the risk of the cardiac and extra-cardiac infections caused by R. dentocariosa, including immunocompromised conditions, pre-existing cardiac disorders, and poor oral hygiene. Peritoneal dialysis (PD) may induce peritonitis presumably due to hematogenous spread from gingival or periodontal sources. This case study aimed to describe a former PD patient presenting with peritonitis. Oral hygiene is a basic principle in PD patients for the prevention of peritonitis. It is speculated that our patient might have had an occult oral source of R. dentocariosa.