فهرست مطالب دکترجمشیدانصاری

Lung cancer has the highest incidence and mortality rate of all cancers worldwide. In Iran, it is one of the commonly diagnosed malignancies, and its frequency is increasing rapidly. Genetic variants in DNA repair genes are linked to differences in efficiency of repairing DNA damage, which can influence lung cancer susceptibility. EXO1 is a key gene involved in the mismatch repair pathway. The K589E polymorphism in EXO1 may alter the DNA repair activity of the encoded protein and impact lung cancer risk. The aim of this study was to investigate associations between the K589E polymorphism in EXO1 and lung cancer risk in the Iranian population, and evaluate its potential as a prognostic biomarker.

This case-control study was conducted to investigate EXO1 K589E variant with susceptibility to lung malignancy in the Iranian population. One hundred patients with lung cancer as a patient group and 100 healthy individuals from Khansari Hospital located in Markazi province were studied, from January 2020 to May 2022. DNA extraction from blood samples of participants was done using a kit.  Genotype determination of both patient and control groups was done using PCR-RFLP technique. Finally, statistical results were analyzed using SPSS software and the logistic regression method.

Genotype and allele frequency  analysis showed the AA genotype (P=0.004, OR=5.391, 95% CI: 1.690-17.200) and A allele (P=0.010, OR=2.851, 95% CI: 1.291-6.300) were correlated with susceptibility to lung cancer. On the other hand, people carrying the G variant allele had a lower risk of lung cancer.

 In summary, this study found the AA genotype and A allele of K589E in EXO1 are correlated with risk of lung cancer in Iranians, while the G allele has protective effects. The K589E polymorphism may serve as a prognostic biomarker for lung cancer susceptibility, but more studies with high population size are required.

Breast cancer is the most prevalent type of cancer in women worldwide. Biological research indicates that damages caused by genetic and environmental factors to the DNA structure are linked to an increased risk of developing breast cancer. Single nucleotide polymorphisms in DNA repair genes can be associated with differences in the repair efficiency of DNA damage and may affect breast cancer. The XRCC3 protein participates in DNA double-strand breaks and recombination repair, in other words, the product of the XRCC3 gene, plays a key role in homologous recombination repair of DNA double-strand breaks. The polymorphism of AluI plays critical roles in breast cancer development. The aim of the present study was to evaluate associations between the risk of breast cancer and AluI polymorphism in the XRCC3 gene.

In the present case-control study, the polymorphism (rs1799796) of the XRCC3 gene and the risk of breast cancer were evaluated in a population consisting of 100 patients and 100 healthy women residing in the Central Province. The genotypes of the samples were determined using the PCR-RFLP technique. Ultimately, SPSS software version 20 was used for statistical analysis, and the final results were utilized. A significance level of less than P < 0.05 was considered statistically significant.

The average age (age range) in the patient group and the healthy individuals was respectively 52.27 ± 12 (27-90) and 48.08 ± 10 (28-75). Comparison of the age categories between the two groups did not show any significant difference (P = 0.429, χ2 = 0.625). The frequency of allele A was 63.5% in the control group and 70% in the patient group, and the frequency of allele G was 36.5% in the control group and 30% in the patient group. Statistical analyses did not show a significant association between allele frequencies and the risk of breast cancer (P = 0.168). The genotypes had the following frequencies in the two groups: genotype AA was observed in 38% of the control group and 48% of the patient group, genotype AG was 50% and 44% respectively, and genotype GG was 12% in the control group and 8% in the patient group. No significant differences were observed between the patient and control groups for the three genotypes at the rs1799796 locus (P > 0.05).

No significant association was found between polymorphism (rs1799796) in the XRCC3 gene and the risk of breast cancer. Consequently, it is suggested that the rs1799796 polymorphism of the XRCC3 gene cannot be used as a biological marker in predictive clinical studies related to breast cancer risk. Further studies in different populations with a larger statistical sample are required.

Lung cancer is the leading cause of cancer death globally. The epidermal growth factor receptor (EGFR) plays an important role in cell proliferation and signaling. In this study, we examined the association between EGFR (rs712829) gene polymorphism and lung cancer risk among the Iranian population.

Subjects and Methods:

 A total of 100 patients with primary lung cancer and 100 matched healthy controls were recruited into this study. EGFR rs712829 single nucleotide polymorphism (SNP) were genotyped by PCR-RFLP techniques for this association with lung cancer risk.

A significant association was observed between the GG genotype (P= 0.039, OR= 5.500, CI=95%; 1.710- 11.921) and also G (P= 0.001, OR= 2.967, CI=95%; 1.557- 5.691) allele of rs712829 SNP with lung cancer risk, this was while the TT genotype and T allele of this polymorphism showed a protective role against risk of lung cancer.

In conclusion, EGFR rs712829 was associated with a risk of lung cancer among Iranians. More studies in other Iranian populations are required to confirm the present findings.

Lung cancer is the most common cancer worldwide with high mortality rates in male and female. In Iran, lung cancer is the third most common type of cancer and its prevalence is increasing rapidly. This disease has a high mortality rate because patients with lung cancer are diagnosed at an advance stage of the disease. Therefore, the presence of tumor markers is essential for treatment and early diagnosis of lung cancer. Studies have shown that there are many genetic variants that are significantly related to the incidence of lung cancer. The present study aimed to investigate the role of key genes in the occurrence of lung cancer.

Methods and Materials: 

This review article has been performed by searching lung cancer, key genes, clinical biomarker, and early diagnosis keywords in various data bases such as NCBI, PubMed, Scopus, Science Direct, and Google Scholar.

EGFR, KRAS and TP53 genes have the highest importance and role in the occurrence of lung cancer; therefore, the identification of mutations in the mentioned genes can play an important role in the diagnosis and treatment of lung cancer as a clinical biomarker.

Identification of genetic variants involved in lung cancer can be used as clinical biomarkers for early diagnosis and appropriate treatment of this disease. Molecular biomarkers can have the potential to improve the current state of early lung cancer detection and treatment methods. Recognizing genetic variants as clinical biomarkers for early diagnosis and evaluation of response to treatment for lung cancer can play an important role in facilitating the treatment process, increasing response to treatment, reducing mortality, and reducing material and spiritual damages caused by this disease.

Breast cancer is the most frequent women cancer in worldwide. Biological and epidemiological data suggest that induced damage by endogenous and exogenous factors affects the integrity and stability of DNA; moreover, it is associated with susceptibility of breast cancer. The XRCC3 gene is one of the most important and repaired genes that, by producing the XRCC3 protein, play a significant role in repairing DNA double-strand breaks and repairing them by recombination method. In other words the product of XRCC3 gene plays a key role in homologous recombination repaired of DNA double-strand breaks and it presents breast cancer with its function. The aim of this study was to investigate the relationship between XRCC3 gene and breast cancer.                 

This review article has been performed by searching breast cancer, the XRCC3 gene, the double-stranded DNA repair, and the homologous recombination repair keywords in various data bases such as NCBI, PubMed, Scopus, Science Direct, and Google Scholar.

Changes including mutations, deletions, displacements, duplication, and singlenucleotide polymorphisms in DNA repair genes such as XRCC3 make a difference in the repair efficiency of DNA damage. Therefore, these damages can lead to breast cancer.                       
 Discussion and

Any change in the XRCC3 gene leads to disruption of the genome repair process; therefore, it plays an important role in the development, growth and progression of breast cancer. The XRCC3 gene can be used as a marker gene in personal medicine for the prevention and screening of breast cancer, as well as a therapeutic goal in the field of breast cancer.

Breast cancer is one of the most common worldwide malignancies among women. Biological data suggest that damage induced by endogenous and exogenous factors affects the integrity of DNA and associated with susceptibility to breast cancer. Single nucleotide polymorphisms (SNPs) in DNA repair genes can associated with differences in the repair efficiency of DNA damage and may affect breast cancer. The XRCC3 protein participates in DNA double-strand breaks and recombinational repair, in other words the product of XRCC3 gene, plays a key role in homologous recombination repair of DNA double-strand breaks. The polymorphism of FokI plays critical roles in breast cancer development. The aim of the present study was to evaluate associations between the risk of breast cancer and FokI polymorphism in the XRCC3 gene. This case-control study was carried out on the women with breast cancer and healthy women located in Markazi province at Arak University Research, Iran, from October 2016 to March 2017. In the present study, the association of FokI polymorphisms and the risk of breast cancer was assessed by Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) techniques. In this method, genomic DNA was extracted from blood samples using the kit procedure. Then, PCR was performed and the SNP-containing DNA amplicons were subjected to digestion of enzymes. Following digestion, each sample was immediately analyzed by 3% agarose gel electrophoresis. Statistical analysis was done using SPSS and SNP Analyzer softwares and the final results were determined. No statistically significant difference was observed between the two groups of patients and controls for three genotypes the site rs1799794 (P=0.435). Genotype AG (P=0.384, OR=0.614, CI=95%, 0.205-1.840) and GG (P=0.867, OR=0.911, CI=95%; 0.308-2.699) had no significant associations with risk of breast cancer. There was no significant association between FokI polymorphisms of the XRCC3 and risk of susceptibility to breast cancer, which was in accordance to some researchers. FokI polymorphisms of XRCC3 gene cannot be used as a biomarker in clinical predictive studies in relation to risk of breast cancer.

Breast cancer is one the most common form of cancer in women all over the world. The incidence of women breast cancer is increasing in Iran. There are many risk factors involved in the risk of breast cancer so that these risk factors have been determined based on genetic, environmental, and geographical conditions in various studies. The current study aimed to evaluate the risk factors of breast cancer in women. Methods and Materials: This study has been performed in Ayatollah Khansari Hospital in Markazi province with the participation of 240 patients with breast cancer and 240 women without breast cancer. Data were collected through interviews based on a prepared questionnaire. Data were analyzed through Logistic regression method and calculation of the frequency of indicators, Chi-square test, and calculation of P values using SPSS software version 20. Statistical analysis indicated that several factors including the abortion, stillbirth, history of breast cancer, early menstruation and poor dietary pattern increase the risk of breast cancer incidence. Moreover, there were significant relationship between the age, number of children, education, and occupation with the risk of breast cancer. In contrast, there were not any significant relationship between the use of anti-pregnancy pill, late menopause, age at first birth and marriage with the risk of breast cancer. Discussion and Identifying and determining the risk factors of breast cancer and raising awareness of these risk factors can play an important role in decreasing the incidence of this disease. It is recommended to conduct further studies on this subject with consideration of other risk factors for breast cancer. In addition, it is suggested to educate the women about breast self-examination and importance of periodic clinical examinations.

Biological and epidemiological data suggest that damage induced by endogenous and exogenous factors affects the integrity and stability of DNA and associated with susceptibility to breast cancer. The XRCC3 protein participates in DNA double-strand breaks and recombination repair. The aim of the present study was to evaluate associations between the risk of breast cancer and Thr241Met polymorphism in the XRCC3 gene.
In this study, the effects of Thr241Met polymorphism of the XRCC3 gene and the risk of breast cancer in a population-based case-control study inclusive 80 patients and 80 healthy individuals of women in Markazi province were evaluated. Genomic DNA was extracted from blood samples using the kit procedure. The genotypes of samples were determined by PCR-RFLP technique. Statistical analysis was done using SPSS software (estimation of χ2 and p-value) and the final results were determined.
Statistically significant difference was observed between the two groups of patients and controls for three genotypes of the site rs861539 (p= 0.000). Genotype CT (p= 0.000, OR=2.352, CI= 95%; 2.431 - 39.948) and TT (p = 0.003, OR= 2.352, CI=95%; 0.611 - 9.049) significant associations were showed with risk of breast cancer. Instead, the genotype CC (p= 0.000) showed a protective role against susceptibility to breast cancer.
This study identified that there is significant association between Thr241Met polymorphisms of the XRCC3 and the risk of susceptibility to breast cancer, which is in accordance to some of researcher's studies.

Biological and epidemiological data indicate that the levels of vitamin D maybe affect the breast cancer risk. Vitamin D plays an important role in cell proliferation, apoptosis and tumor growth suppression. Vitamin D receptor is a critical mediator for the cellular reactions of vitamin D. Some of the epidemiological studies, reviewed the relationship between VDR gene polymorphism ApaI and breast cancer, but the controversial findings have been achieved.
In this study, a population-based case-control study including 140 patients and 160 healthy individuals of women in Markazi Province were evaluated using PCR-RFLP approach. Genomic DNA was extracted from blood samples using the salting-out procedure. Polymorphism of interest was determined by PCR-RFLP method using ApaI enzyme and statistical analysis was performed by SPSS software.
Based on the results of this study, distribution of AA genotype in cancer and control groups was, 38.6 and 26.87, for AC genotype 55.00 and 66.87, and finally for CC genotype 6.43 and 6.26 respectively. The results of this study showed no association between ApaI polymorphism of the VDR gene and breast cancer(OR=0.903,CI=95%, 0.29-2.95.)
In this study, we found no association between ApaI polymorphism and breast cancer, which are consistent with the findings of some other researchs. It is necessary to examine a larger population to achieve more definitive results.

Breast cancer is both the prevailing malignancy and the most common cause of cancer death among women. Many factors may play a role in the susceptibility to the breast cancer and Oxygen Free Radicals may be one of these. There are various known antioxidant systems against oxidative stress, including ParaoxonaseI. The aim of this study was to investigate the association between rs854560 polymorphism in the PON1 gene in patients with breast cancer.
We performed genotyping analysis using polymerase chain reactionrestriction fragment length polymorphism (PCR-RFLP) assay in a case–control study of 83 confirmed breast cancer patients and 100 cancer-free controls in Markazi Province.
In our study of the PON1 gene L55M polymorphism, the LL genotype was found in 2 (2.40%) patients, whereas the LM genotype was found in 69 (83.13%) patients. The MM genotype was present in 12 (14.45%) patients. In the control group, LL, LM and MM genotypes were found in 4 (4%), 81 (81%), and 15 (15%) subjects, respectively. There was no statistically significant difference between patient and control groups in terms of the PON1 gene L55M polymorphism (p= 0.825). Allele distributions were different but this difference did not reach statistical significance (p= 0.920).
We found no association between M55L polymorphism and breast cancer.

Typhlitis is a complication in GI tract specially in ileum and cecum due to sever prolonged neutropenia. The syndrome usually occurs in patients with leukaemia who take aggressive chemotherapy or in solid tumor treated with taxane base regimen. The syndrome is accompanied with neutropenia, fever, generalized abdominal pain specially in right lower quadrant and probably a mass in this area. Case: The patient is a 44 year old man which was presented with enlargement of right testes since two months ago. In sonographic evaluation of testes a mass was defined and surgery was done for him, which pathologic result was seminoma. Staging workup was done and in CT Scan a lymph node with size of 35 mm was detected in paracaval area. According to this result the patient received chemotherapy with Cisplatin and Etoposide. One day after completion of chemotherapy he developed abdominal pain, fever and bloody diarrhea and referred to hospital and admitted with diagnosis of typhlitis. Typhlitis is not restricted to a complication of leukaemia treatment or taxane base chemotherapy and other cytotoxic drugs can induce this problem. On the other hand, neutropenia and typhlitis can occur immediately after chemotherapy in sensitive patient and so the time of nadir value of white blood cell is too short.

Radiotherapy after breast cancer surgery will increase local control of the disease and also increase overall survival. Radiation have some side effects on lung function. In different radiotherapy techniques, these side effects are different. Pulmonary function tests and oxygen saturation are methods for evaluation of these complications. In this study we decide to campare pulmonary complications in two radiotherapy methods. In this clinical trial study fifty one patients with breast cancer in stage II and III according to TNM staging system, which were under modified radical mastectomy in Imam Hosein hospital and refered for adjuvant radiotherapy, randomly divided in two groups. In one group patients were treated with three field technique and in others with four field technique. All patients received total dose of 48-50 Gy. For patients, pulmonary function test and pulse oxymetery were done once before initiation of radiotherapy and then one and three months after radiotherapy. Measurement of FEV1, FVC and show that no significant statistical difference was present between the two groups one month and three months after radiotherapy, also in each of the two groups the amount of FEV1, FVC and one month after radiotherapy had no significant statistical difference in comparison to baseline tests but FEV1 and FVC after three months was decreased and had significant statistical difference respectively (p<0.001, p<0.006). SO2 had no significant defference between the two groups and also in each group after one and three month of radiotherapy. Locoregional radiotherapy of breast and lymph nodes areas causes a decrease in some parameter of pulmonary function tests but no difference was present between three field and four field techniques.