Showing 6 results for Hesami
Noori-Daloii Mr, Hesami Ss,
Volume 67, Issue 9 (6 2009)
Abstract
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Telomere, by which is a terminal structure of
eukaryotic chromosomes was discovered at first in 1938 and has a vital role in
chromosome protection. Telomere in human and other vertebrates consists of
thousands of 5′-TTAGGG-3′
tandem repeats at the end of the chromosome, has a main role in the chromosome
stability. Telomere protects the end of the chromosome from degeneration,
rearrangement and end to end fusion. There is a telomere loss at every cell
division. Progressive loss in telomere length results in disassociation of
telomere binding proteins and change in gene expression profiles. Adjacent genes
are suppressed by the telomere effect so the telomere loss results in adjacent
gene expressions. Apoptosis and replicative senescence are caused by
progressive telomere loss. There are three mechanisms for increasing telomere
length in eukaryotes and telomerase is the predominant mechanism. Telomerase
can synthesize telomere, without the template. Telomerase is overexpressed In 90% of cancers. Therefore cancerous cells compensate
the telomere loss in every cell division because of telomerase. In conclusion,
telomerase is a proper target for cancer therapy and many methods including
direct inhibition of telomerase and immunotherapy have been introduced.
Bita Eslami, Ramesh Omranipour , Bahare Hesamifar, Zahra Behboodi Moghadam , Amirmohsen Jalaeefar,
Volume 78, Issue 11 (February 2021)
Abstract
Background: Breast cancer is the most common cancer in women and its treatment includes various surgeries. Breast-Q is a new patient-reported outcome instrument for breast surgery and it should be validated appropriately for clinical research. This study aimed to develop the Persian version of the Breast-Q and validate the reconstruction module to evaluate the quality of life and satisfaction of Iranian women with a previous history of breast reconstruction.
Methods: This study was descriptive and analytical cross-sectional. The study population consisted of women with a previous history of breast cancer and various breast surgeries referred to the outpatient clinic of Cancer Institute, Imam Khomeini Hospital from September 2017 to October 2019, using convenience sampling. After obtaining permission from the MAPI institute and translating all questionnaires into Persian, the validity, and reliability of the breast reconstruction module were evaluated. To confirm face validity, a questionnaire was given to patients to judge each item. To confirm the content validity of the questionnaire, two qualitative and quantitative methods were used. Content validity ratio (CVR) was calculated based on the expert opinion (Lawshe formula). Waltz & Bausell’s method was used to examine the content validity index (CVI). Finally, a new version of the questionnaire was assessed in 20 women who had undergone TRAM flap breast reconstruction at least 6 months ago.
Results: After translation of the questionnaire into Persian, and face and content validation process, the 116 items of the first questionnaire converted to 72 with an acceptable impact score greater than 1.5 and CVR and CVI. The internal validity of the breast reconstruction module was approved by Cronbach's alpha value of 0.94.
Conclusion: Considering the limitation of the specific questionnaires for various breast surgery procedures, the Breast-Q questionnaire can be an efficient tool for the evaluation of the quality of life and satisfaction in patients. Since the translation of the questionnaire has become valid and reliable, it can be used for future research by other researchers. |
Homayoun Tabesh, Azadeh Keivani Borojeni , Mohammad Bagher Sadeghi , Maedeh Rouigari, Mohammad Hesamian, Bahram Aminmansour, Hamidreza Khani ,
Volume 79, Issue 4 (July 2021)
Abstract
Background: lumbar disc degeneration is a multifactorial degenerative disease which is affected by genetic inheritance and environmental factors. Type XI collagen is important for organization of the extracellular matrix and cartilage collagen construction. Rs1676486 is a SNP that causes the conversion of C-T, resulting in a change in the expression of the collagen 11 alpha chain. The T allele reduces the alpha 1 chain transcription of collagen 11 and ultimately leads to an imbalance in gene expression.
Methods: This study aims to determine the genetic variant of alpha1 type11 collagen is associated with the progress of intervertebral disc degeneration. All patients were selected from the AL-Zahra Hospital of medical university of Isfahan, Iran, between April 2016 and September 2017. SNP rs1676486 of alpha1 type11 collagen was genotyped in 100 patients and 100 healthy controls. The inclusion criteria for patients were: individuals who had typical clinical and imaging symptoms and signs of intervertebral disc degeneration. Exclusion criteria were: patients with trauma, metabolic and neuromuscular diseases, and congenital disorder of the spine. The Genomic DNA was extracted from peripheral blood samples by a Whole Blood Genomic DNA Extraction Kit. The chi-square test and fisher’s exact test were evaluated to determine differences of genotype and allele distributions between intervertebral disc degeneration patients and healthy controls. To compare the relationship between genotypes and clinical features the Mann-Whitney U test was used.
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Results: The mean age was 39.54±9.52 years for the patients and 28.14±5.32 years for the controls, respectively. The mean BMI were 26.3±3.18 kg/m2 and 27.3±3.52 kg/m2 for the patients and the controls, respectively. In addition, the results showed that the prevalence of surgical disc in patients with L4-L5 levels was 52.1% and L5-S1, with 31.1%. This study showed, rs1676486 in alpha1 type11 collagen gene was associated with modified intervertebral disc degeneration at age ≤50 years and this gene increases intervertebral disc degeneration risk at age >50 years. SNP rs1676486 had the significant association with the intervertebral disc degeneration (P=0.019), and patients were found to have higher frequency of AA than the controls.
Conclusion: This observation shows that type XI collagen is related to age and genetic factor in intervertebral disc degeneration disease.
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Maral Banihashemi Torshizi , Seyed Mehdi Tabaie, Mina Sadat Naderi, Saeed Hesami Tackallou ,
Volume 79, Issue 10 (January 2022)
Abstract
Background: Skin cancer is the most prevalent type of cancer and melanoma is the deadliest kind of skin cancer in the world. Due to enhanced induction of apoptosis and ROS levels, low-level lasers can be utilized to destroy skin cancer cells. Lasers are used to treat some skin lesions. Vitamin A is beneficial in the prevention and treatment of skin cancer. Vitamin A inhibits the pathway of cancer signals in the skin and suppresses tumor growth. In this study, the combined effect of low-level laser radiation (LLL) and vitamin A on cellular factors of skin melanoma cancer cells was investigated.
Methods: An in-vitro interventional laboratory study was performed in the cell culture laboratory of Medical Laser Research Center, Yara Institute in 2020-2021 (July 2020 to July 2021). First, A375 skin cancer cells were cultured in DMEM with 10% FBS. After preparation and culture of A375 cell lines, different concentrations of vitamin A (1, 5, 50, 100 μM) and LLL energy doses (1, 2, 5, 10 J/cm2) as treatments were done. Combination research of these treatments was performed to eliminate skin melanoma cancer cells. The rate of viability was determined using the MTT test, and the rate of apoptosis was determined using flow cytometry.
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Results: The results indicated that a low-level laser with energy dosages of two and 5 J/cm2 and vitamin A treatment with a concentration of 50 μM in the A375 skin cancer cell line had the lowest viability and the highest induction of apoptosis. Furthermore, the results of the combination of Vitamin A and LLL treatments showed a synergistic effect with a greater reduction in the viability of skin melanoma cells and a greater amount of apoptosis.
Conclusion: In general, vitamin A and Low-level laser diminish the viability of cancer cells. Combination therapy of Low-level laser in the effective dose with vitamin A in optimal concentration provides anti-cancer effects. Further reductions in cancer cell viability caused by vitamin A and low-level laser radiation could pave the way for a novel approach in cancer treatment.
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Kouros Divsalar, Sara Hesami, Majid Mahmoodi, Navidreza Giahi, Fatemeh Divsalar , Mohammad Pour-Ranjbar , Amin Honarmand,
Volume 80, Issue 7 (October 2022)
Abstract
Background: Based on the studies, variation in the mitochondrial DNA (mtDNA) copy number in peripheral blood leukocytes is associated with increased susceptibility to diseases including cancer. Opiate abusers are at high risk for diseases. In this study, we measured the mtDNA copy number in peripheral blood leukocytes in a group of opiate abusers compared with those in healthy individuals.
Methods: In a case/control study, three groups were selected consisting of 32 opium abusers, 24 heroin addicts and 25 healthy individuals. The amount of 5 ml of whole blood was collected from each individual who participated in the study and stored at -20 centigrade. The sample collection was performed from November 2018 to February 2020. Case groups were recruited from the Methadone maintenance therapy center. Contro group had no history of drug use and cigarette smoking. DNA was extracted from the whole blood samples using the salting out method. The DNA from a mitochondrial gene, dehydrogenase subunit1 (-ND1 gene) and a nuclear gene, human globulin (HGB gene), were quantified by a real-time PCR-based method to measure the relative mtDNA copy number of each group number.
Results: There was no significant difference in demographic characterization between the three study groups, opium abusers, heroin addicts and healthy individuals. We found that opium users had a higher mean of mtDNA copy number than those in the healthy control group (P=0.11). Heroin addicts had also higher mean of mtDNA copy number than those in healthy group (P=0.21). The mean mtDNA copy number in opium abusers was higher than that in heroin addicts (P=0.22), although the difference was not statistically significant.
Conclusion: The results of this study indicated that mtDNA copy number increased in a group of opiate abusers. Considering that alteration of mtDNA copy number is associated with increased susceptibility to several diseases including cancer, further research on mtDNA copy number with a high number of volunteers of opiate addicts may clear the effect of opiate abuse on the human genome.
Najibeh Mohseni Moalem Kolae , Abdolreza Jafarirad, Mohammadhossein Hesamirostami , Khadije Moeiltabaghdehi , Mojtaba Ghorbani , Abolfazl Hosseinnattaj,
Volume 82, Issue 4 (July 2024)
Abstract
Background: Death is one of the serious consequences of burns, which usually occurs as a result of hospital infections. This study was conducted with the aim of investigating the existing disagreement regarding the admission of more than 90% patients in the burn intensive care unit with the isolation room of the burn unit.
Methods: This retrospective descriptive-analytical study was conducted based on case review. The statistical population included the files of patients hospitalized in the burn wards and burn intensive care unit of Zare'e Sari Burn and Psychiatric Center from 2011 to 2023 who died. All these patients were included in the study as a census. The data was extracted through a checklist prepared by the researcher. Descriptive and inferential analysis of the data was performed using SPSS version 21 software. The variables studied included gender, age, burn percentage, burn factor, and duration of hospitalization, and determining the relationship between burn percentage and survival time in the two burn intensive care units and the isolation room of the burn unit was the main variable. The mean and standard deviation were used to describe quantitative data, and the frequency and percentage were used to describe qualitative data.
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Results: Among 882 cases, 226 patients had burns above 90%. 143 cases were related to men (63.3%). Most patients were in the age group of 19 to 40 years (61.9%). The cause of the burn (54.9%) was flame. Among the patients (83.2%) were hospitalized in the isolation room of the burn ward. Although the average days of hospitalization of patients above 90% in the burn intensive care unit was 13.71±11.82 days and the burn isolation room was 8.66±9.11 days, the Mann-Whitney test showed that the average survival time of these patients in the burn isolation room of the burn ward was significantly different from the intensive care unit. (sig.=0.001).
Conclusion: Although the average survival time in the two groups showed a significant difference, ultimately all patients in the two groups died within a few days of each other.
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