Search published articles


Showing 7 results for Color
The relationship between Microbial Floraand Colorectal Cancer
M Rahimkhani, Ma Mohagheghi,
Volume 1, Issue 2 (2-2008)
Abstract

Background and Aim: The human bowel contains a large and dynamic bacterial population (more than 500 species of bacteria). Some intestinal bacteria such as Streptococcus bovis , Enterococcus and Bacteroides fragilis have previously been suggested to be implicated in the promotion of colon carcinogenesis probably through the conversion of mutagen metabolites.

Materials and Methods: Thirty patients with colorectal cancer confirmed by colonoscopy examination and pathological survey were evaluated. Thirty healthy people who matched by sex and age with patient group were identified. Fecal samples were collected from patient and control groups were cultured in specific and non-specific culture media (aerobic and nonaerobic situations).Organisms isolated by microbial and biochemical pathways.

Results: S. bovis was predominant fecal microbial flora in nine (39.1%) patients and six (26.1%) of control group (P=0.657). Entrococcus was predominant fecal microbial flora in 6 (26.1%) patients and 2 (8.7%) of control group (P=0.657). B. fragillis was predominant fecal microbial flora in 8 (21.7%) patients and 2 (5.4%) of control group (P= 0.062).

Conclusion: Our results by fisher statistical analysis show that the incidences of fecal S. bovis, Enterococcus and B. fragilis in colorectal cancer were not significantly higher than health people.

 


Study of concentration of added colors to juice of black cherry and juice of barberry on display in shop in the city of Tehran
Mm Soltan Dallal, S Vahedi, A Najjarian, A Dastbaze, T Kaffashi, E Pirhadi, A Kamkar, T Faramarzi, V Mahdavi,
Volume 2, Issue 1 (9-2008)
Abstract

Background and Aim: Foodstuffs additives are a general term for materials that are added to the foodstuffs in order to increase durability and to improve the appearance, composition, taste and food nutritional value. Colors are classified in this group and are added to foodstuffs in order to increase their attraction. The aim of this survey was to analyze status of added colors to the juice of black cherry and juice of barberry which are produced in Tehran City, capital of Iran.

Materials and Methods: Three haundred thirty six samples of dried sweets were randomly collected and analyzed from different areas of Tehran. First, the samples were de-colored by Clorhidric Acid, and then were analyzed after refining by Thin Layer Chromatography (T.L.C) method.

Results: Eighty nine percent from the total samples contained colors. Among chromatic samples, 62 samples (18.5%) out the total samples, contained artificial, non-edible colors and 237 samples (70.5%) from the total samples contained artificial and edible colors (for Industrial Producers) and 37 samples (11%), contained natural colors. Carmoisine color was detected more than added colors in juice of black cherry and juice of barberry.

Conclusion: Low costs, stability, Ph and similarity of artificial dyes with natural dyes motivate the producers for high utilization of these dyes without considering their possible hazards and/or their edible quality aspects.


The Relationship Between Pityriasis Versicolor And Cholesterol And Triglyceride Levels In Isfahan Province 
Hossein Nowrozi, Ali Kazemi, Zakiye Azadi, Fatemeh Farhid, Parvin Moazemi,
Volume 6, Issue 2 (7-2012)
Abstract

Background and Aim: Pityriasis versicolor is a fungal disease with causative agent Malassezia species which is an opportunistic and lipophilic yeast .With regard to liphophilic nature of the yeast, this study was carried out for evaluation of relationship between pityriasis versicolor and triglyceride and cholesterol levels.

Materials and Methods: This cross - sectional study was performed on 1500 subjects ranging from 10 to 50 years old in Isfahan province. Of total subjects, 105 had pityriasis versicolor. Disease confirmation was based on direct examination, inoculation and culture on Dixon media. Measurement of total cholesterol and triglyceride of patients and control groups in fasting manner was done by Auto analyzer RA 1000. Data of patients including age, education level and job was gathered by questionnaire and analysis of results was done by t student, chi square and Pearson correlation tests.

Results: Prevalence of infection was 7% in the test group. Maximum frequent rates of infection was %3.13 in age group 20- 30 years and minimum in age group 30-40 years(% 0.87). The highest rate of total cholesterol levels was seen in age group 40-50 years (mean 215 mg/dL) and the lowest was in age group 10-20 years(mean 205 mg/dL).

Conclusion: Total cholesterol and triglyceride levels in patients were higher than the control group but the difference was not significant(P<0.05). No correlation was seen between pityriasis versicolor and increase in the total cholesterol and triglyceride levels in patients and control groups.


Decision Model Making for Colorectal Cancer Screening Based on Risk Determination
Raoof Nopour, Mohammad Shirkhoda, Sharareh Rostam Niakan Kalhori,
Volume 14, Issue 2 (5-2020)
Abstract
Background and Aim: Colorectal cancer is one of the most common gastrointestinal cancers among human beings and the most important cause of death in the world. Based on the risk of colorectal cancer for individuals, using an appropriate screening program can help to prevent the disease. Therefore, the purpose of this study was to design a model for screening colorectal cancer based on risk factors to increase the survival rate of the disease on the one hand and to reduce the mortality rate on the other.
Materials and Methods: By reviewing articles and patients' records, 38 risk factors were detected. To determine the most important risk factors clinically, CVR(content validity ratio) was used; and considering the collected data, Spearman correlation coefficient and logistic regression analysis were applied for statistical analyses. Then, four algorithms -- J-48, J-RIP, PART and REP-Tree -- were used for data mining and rule generation. Finally, the most common model was obtained based on comparing the performance of the algorithms.
Results: After comparing the performance of algorithms, the J-48 algorithm with an F-Measure of 0.889 was found to be better than the others.
Conclusion: The results of evaluating J-48 data mining algorithm performance showed that this algorithm could be considered as the most appropriate model for colorectal cancer risk prediction.

Apoptotic Induction in Human Colorectal Adenocarcinoma Cell Line and Growth Inhibition of Some Gastrointestinal Pathogenic Species by Lactobacillus Sakei Metabolites
Mohammad Saber Malaki, Leila Rouhi, Khalil Khashei Varnamkhasti,
Volume 14, Issue 6 (1-2021)
Abstract
Background and Aim: Lactobacillus is the most important genus of lactic acid bacteria and the use of some species of lactobacillus with the probiotic potential can be effective for inhibition of the growth of some pathogens and control of 
gastrointestinal diseases and cancers. In this study, the pro-apoptotic and antimicrobial effect of Lactobacillus sakei on human colorectal adenocarcinoma cell line and some gastrointestinal pathogenic species was examined. 
Materials and Methods: In this study, the antimicrobial activity of metabolites of Lactobacillus sakei was assessed by Well Diffusion Agar (WDA) method against some gastrointestinal pathogenic bacteria. HT-29 colorectal adenocarcinoma cancer cells were cultured in DMEM medium with 10% bovine serum. The cells were treated in 5, 10, 15 and 20 mg/ml concentrations of sakei metabolites and incubated at 24 and 48 hours. Apoptosis was analyzed by Annexin V-FITC/PI kit according to the manufacturers protocol in both incubation times. For error reduction, each test was performed in triplicate
Results: The results of this study indicate that sakei  was able to produce antimicrobial metabolites against gastrointestinal pathogenic bacteria. Also, the results of the Annexin test showed that with increasing concentration of sakei metabolites in dose dependent manner, induction of apoptosis in this cell line increases (P<0.05).
Conclusion: It seems that there is a good research field for the use of bioactive compounds produced by Lactobacillus sakei in the control of gastrointestinal pathogenic bacteria and treatment of human colorectal adenocarcinoma. 

Effect of citric acid on Bioavailability and apoptosis induction in human colorectal Adenocarcinoma cell line (HT29)
Khalil Khashei Varnamkhasti, Leila Rouhi, Mehdi Aalmomen,
Volume 15, Issue 3 (8-2021)
Abstract
Background and Aim: Colorectal adenocarcinoma is one of the common causes of death due to weak response to common therapies. In this study, the effect of citric acid on bioavailability and apoptosis of the human colorectal adenocarcinoma cell line (HT29) was examined. Citric acid is a naturally organic acid that commonly found in citrus and is considered as a physiological inhibitor of enzymes involved in glycolysis pathway to remove cancer cells.
Materials and Methods: In this study, HT-29 colorectal adenocarcinoma cancer cells were cultured in DMEM medium with 10% bovine serum. The cells were treated in 400, 800 and 1600 μg/ml concentrations of citric acid and incubated at 24, 48 and 72 hours respectively. Cell growth was analyzed by MTS kit and apoptosis was analyzed three times by flow- cytometry using an Annexin V-FITC/PI kit according to the manufacturers protocol.
Results: The results of bioavailability of treated HT-29 cells with different concentrations (400, 800 and 1600 μg/ml) of citric acid, after trinary incubation time (24, 48 and 72 hours) using the MTS assay showed that, bioavailability of HT-29 cell line decreased at all concentrations of citric acid in a time dependent manner. Also, the results of the apoptosis induction in treated HT-29 cell line with different concentrations (400, 800 and 1600 μg/ml) of citric acid, after trinary incubation time (24, 48 and 72 hours) using Annexin V-FITC/PI test showed that the percentage of the early and late apoptosis cells increased with increasing citric acid concentration and incubation time, which increased the percentage of apoptosis compared to the control group is significant in all three times of 24, 48 and 72 hours.
Conclusion: The results indicate that citric acid can reduce the bioavailability of colorectal adenocarcinoma cells by inducing apoptosis pathway. 

Economic Burden of Colorectal Cancer: A Scoping Review
Keyhan Fatehi, Farimah Rahimi, Reza Rezayatmand,
Volume 17, Issue 1 (3-2023)
Abstract
Background and Aim: Colorectal cancer is one of the most common cancers that its incidence and prevalence and so deaths due to this cancer have increased worldwide recently. This study examines the economic burden of colorectal cancer from different perspectives by conducting a scoping review.
Materials and Methods: In this scoping review, by searching Scopus, PubMed, Embase, Cochrane, and Web of Science, the articles reporting the costs of CRC were reviewed. The search was limited to those published in the past years leading up to 2020. In addition to categorizing different aspects of the reviewed paper, per capita costs were adjusted with the purchasing power parity in order to make some comparisons possible. In this study, the calculated costs of retrieved studies were categorized based on the perspective of each study.
Results: Out of 29 studies, only two have reported indirect costs of CRC, and 4 studies have reported both direct and indirect costs. In other studies, only direct costs of CRC have been reported. Nearly 40% of studies calculated CRC costs from the provider’s perspective. The highest reported annual per-patient cost was $175020(PPP-adjusted) which is related to the average annual costs of patients with CRC at the fourth stage in the United States from a provider perspective. The lowest reported amount was $ 954(PPP-adjusted) which was related to average annual inpatient costs in Brazil from a provider perspective.
Conclusion: Due to variations in study characteristics in terms of perspective, type of costs, type of patient included, etc. any comparison between the economic burden of CRC should be made with caution. However, reviewing various aspects of the economic burden of CRC reported in included studies, will provide researchers and policymakers with a better insight into the CRC burden while designing intervention programs will reduce the budget impact of the those programs.

Page 1 from 1     

© 2025 , Tehran University of Medical Sciences, CC BY-NC 4.0

Designed & Developed by: Yektaweb