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1.
Ann Med Surg (Lond) ; 86(6): 3242-3248, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38846822

RESUMO

Background: Examining the raw and standardized mortality rates is the primary strategy for improving life expectancy and human health in society through identifying risk factors and dealing with the factors that cause them. Objectives: This study examined the trend of mortalities due to traffic and nontraffic accidents. Methods: This cross-sectional study examines the registered mortalities during the years 2016-2022 in the form of a census in the health department's death registration and classification system. Mortality was analyzed as raw and standardized mortality in each 100 000 population. Results: Out of 18 265 deaths during 2016-2022, 1305 (7.15%) were related to accidents and incidents. The age-standardized total mortality rate in the first year was 32.9, and in the final year of the study, it was 33.3 per 100 000 people; although there are fluctuations, this trend is upward (P.trend=0.021). Also, the age-standardized traffic death rate in the first year is 19, and in the final year is 12 per 100 000 people; this decreasing trend was not statistically significant (P.trend=0.061). The incidence of age-standardized intentional nontraffic deaths was 1.7 in the first year of the study interval and 9.8 in the last year in 100 000 people, which showed an upward trend (P.trend<0.001). Conclusion: In light of the generally increasing trend of accidents, especially nontraffic accidents, universal and well-rounded measures are necessary for safety matters and reducing mortality.

2.
Cancer Rep (Hoboken) ; 7(3): e2001, 2024 03.
Artigo em Inglês | MEDLINE | ID: mdl-38433617

RESUMO

BACKGROUND: Cancers, especially Upper Gastrointestinal Cancers (UGCs), pose a substantial burden on society, particularly in developing nations. Golestan province, Iran, is known for its high UGC rates globally. AIMS: This study delves into the disease burden of UGCs in the eastern part of Golestan province. METHODS AND RESULTS: This study was conducted using the results of the Golestan cohort study. 2711 patients participating in this cohort, who visited Atrak Clinic during 2001-2020, participated in this study. After excluding patients with incomplete records, 2481 patients were included in the study. To compute the metrics of years of life lost (YLL), years of life lived with disability (YLD), and disability-adjusted life years (DALY), we utilized the World Health Organization's standard life table, stratified by age and gender. The majority of UGC patients in our study were married (81.8%), had limited formal education (82.6%), and were predominantly male (61.1%). A substantial proportion resided in suburban areas (85.8%), and over half of the patients (52%) reported a history of drug addiction. The mean age at diagnosis for men was 65.76 years with a standard deviation of 11.34, while for women, it was 64.38 years with a standard deviation of 11.66. Regarding disease impact, YLL, YLD, and DALY for men were 21 240, 1956, and 23 196 (307.8 per 100 000), respectively. For women, these figures were 15 609 for YLL, 1367 for YLD, and 16 976 (223.1 per 100 000) for DALY. CONCLUSION: After the increasing trend of the burden of UGCs in Golestan province in the early years of the study, this rate has been decreasing in recent years. Effective strategies necessitate collaborative efforts across various sectors to alleviate this burden, focusing on preventive measures, timely diagnosis, and well-coordinated therapeutic interventions.


Assuntos
Neoplasias Gastrointestinais , Humanos , Feminino , Masculino , Estudos de Coortes , Neoplasias Gastrointestinais/epidemiologia , Efeitos Psicossociais da Doença , Irã (Geográfico)/epidemiologia
3.
Ann Med Surg (Lond) ; 85(11): 5577-5583, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37920653

RESUMO

Introduction: Vaginal cancer is one of the major causes of mortality in women, which mostly takes place in low- and middle-income countries. Assessing the survival rate of vaginal cancer is essential to investigate the success rate of current treatments and screening tools. This study aims to determine the survival rate of vaginal cancer in Asia. Methods: This systematic review was carried out using four international databases, including Medline/Pubmed, ProQuest, Scopus, Web of Knowledge, and also Google Scholar. Articles were investigated up to the end of August 2021. The authors utilized the Newcastle-Ottawa Scale to evaluate the quality of the articles. Evaluating the papers for heterogeneity was performed using the Cochrane test and I² statistic. Meta-regression analysis was also applied based on the year of the study. Results: Three articles (13 records) fulfilled the inclusion criteria. Based on the random model, the overall 5-year survival rate was 74.63%. Also, the rates of survival in relation to the type of treatment including chemotherapy, radiotherapy, or other modalities, were 78.53, 78.44, and 68.54%, respectively. According to meta-regression analysis, no correlation was found between the survival rate and the year of the study. Conclusion: The vaginal cancer survival rate is lower in Asian countries compared to that of developed countries. Increasing patient survival rates in such countries is crucial by implementing newer diagnostic tools, advanced surgical techniques, and goal-oriented treatments. Early diagnosis in lower stages and educating the populations about risk factors and preventative measures are also necessary for raising the rate of survival.

4.
Caspian J Intern Med ; 14(4): 720-727, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38024171

RESUMO

Background: Rapid economic progress and cultural-social changes have led to lifestyle changes and increased risk of breast cancer all around the world, including Iran. This study aims to investigate the 30-year incremental pattern of breast cancer in patients of Shahid Rajaei Radiation Therapy Center in Babolsar, North of Iran.||. Methods: In this cross-sectional study, the data were retrospectively extracted from the physical and electronic files of patients diagnosed with breast cancer from 1992 to 2021 every 5 year by census method, during the study, overall, 1326 patients' information out of 6199 patients was analyzed using SPSSV.22 software at the level of p-value ≤ 0.05. Results: The average age of patients was 49.84 ± 11.26 years, which has been increasing over the years of study. 6143(99.13%) patients were women, the mean and standard deviation of their BMI was 29.63 ± 6.00, the number of patients with stage 1 is increasing, and patients with stage 3 is decreasing. 871(65.70%) people went through Radical Mastectomy (MRM), 261(19.68%) people experienced metastasis. There was a statistically significant relation between the type of surgery, stage of cancer, metastasis, and local recurrence within the years of study (p<0.001). Conclusion: Breast cancer and the age of getting it have increased in recent years. However, advanced stages as well as metastasis and local recurrence have decreased during the investigated years. Therefore, it is recommended to continuously warn women about the risk factors and develop suitable disease screening programs and implement them effectively.

5.
PLoS One ; 18(9): e0291139, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37713374

RESUMO

BACKGROUND: The cancer registry system is an important part of the cancer control program. Improper coding of cancers leads to misclassification and incorrect statistical information about cancer. Therefore, in this study, the main objective of the qualitative analysis was the accuracy in assigning the codes to the pathological reports in the centers responsible for cancer registry. METHODS: This study was descriptive, retrospective and applied. The data source in this study included 15,659 pathology reports received during the years 2017-2019 in the population-based cancer registry centers of Mazandaran province. Out of 1800 reports, 1765 samples of reports were selected and analysis was done on them by stratified random sampling method. A researcher-made checklist was used to collect data, and the Kappa agreement coefficient and Cohen's agreement percentage were presented to check the accuracy of the reports. STATA13 was used for data analysis. RESULTS: 1150 of 1765 pathology reports (65.0%), did not have a topographic, morphological and behavioral codes and 410 (23.2%) had grade codes. The Kappa coefficient in reports with a topography code was 0.916 and with a morphology code it was 0.929, respectively. In behavior coding, the highest agreement is in the category of benign cancers at 65.2% and in grade coding in the category without grade is 100%. CONCLUSION: The most reports were on carcinoma morphology, and the Kappa coefficient in morphology codes has almost complete reliability. In terms of behavior coding, there was the most agreement in the category of benign cancers. The Kappa coefficient in given behavior codes has low reliability.


Assuntos
Lista de Checagem , Neoplasias Epiteliais e Glandulares , Humanos , Irã (Geográfico)/epidemiologia , Reprodutibilidade dos Testes , Estudos Retrospectivos , Sistema de Registros
6.
Caspian J Intern Med ; 13(3): 589-598, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35974944

RESUMO

Background: Prerequisite for achieving the goals of the registration program is the existence of valid and accurate data, and the usability of this data is possible if they are coded correctly. This study assets the quality of pathological data of the population-based cancer registration centers based on ICD-O-3. Methods: This applied study was performed descriptively and retrospectively. The study population included 20129 pathology reports sent to the population-based cancer registration center of Mazandaran Province during 2018-2020. A total of 2015 out of, 2050 samples of the received reports were examined according to stratified random sampling method. A researcher checklist was made to collect the data, and STATA 13 and Cohen's Kappa agreement coefficient were used to analyze the data. Results: Among the 2015 reports of pathology, 1114 (55.3%) pathology reports were related to government centers, (42.9%) 865 cases were registered with their topographic code, morphology and behavior. Based on the registration of the exact topographic code, the kappa coefficient and the total agreement were 0.266 and 27.70%, respectively. Kappa coefficient in all received reports and reports with topographic code was 0.346 and 0.906, respectively. In the reports with topographic code, the most reports of cancers were related to cancers of the gastrointestinal organs (97.6%) 246. Conclusion: The accuracy of the codes given in the pathology centers in terms of topographic, morphological, behavioral and grade codes based on the percentage of agreement with the coding was above average, which were higher in governmental centers and also in some cancers.

7.
Cost Eff Resour Alloc ; 19(1): 71, 2021 Oct 18.
Artigo em Inglês | MEDLINE | ID: mdl-34663353

RESUMO

BACKGROUND: Inappropriate ways of health services purchasing for cancer patients can be challengeable and costly and seriously affect the access to health services and outcomes. This study aimed at Factors affecting health services strategic purchasing for breast cancer patients. METHODS: As a mixed study, this research was conducted in Iran in 2020. In the qualitative phase, 21 specialists and professionals in the field of health services purchasing were purposefully selected and interviewed. After data saturation, interviews were analyzed with the framework analysis and a structured questionnaire was made based on these analyses. 400 breast cancer patients were selected by randomized sampling and completed the questionnaire. Data were analyzed with SPSS23 in p < .05. RESULTS: The highest mean rate of the three main categories belonged to "insurance trusteeship" (4.71 ± .35), followed by "supply management" (4.48 ± .27) and "financial performance" (4.48 ± .37). There were significantly differences between the mean rates of the main categories and the cut-off point (p < .001). In addition, "insurance trusteeship" ranked first (2.58), followed by financial performance (1.77) and supply management (1.65). CONCLUSION: Of main components in health services strategic purchasing for breast cancer patients, insurance trusteeship, supply management, and financial performance ranked first to third, respectively. Therefore, healthcare policy-makers should consider the placement of insurance trusteeship and coordinate between purchasers and providers for making reform in the health system.

8.
Health Care Manag (Frederick) ; 39(1): 35-45, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31880674

RESUMO

The strategic purchasing creates dynamics and providers' competitiveness among the internal market of governmental sector with ensuring appropriate payments and promoting quantity-quality of service delivery that lead to improve the health system efficiency. This study aimed to determine the requirements for the strategic purchasing of health services for cancer patients in Iran. As a qualitative research with a framework analysis, this study was conducted in Iran from July 2018 to February 2019. The participants were included some administrating managers, experts, and specialists of insurance selected purposefully by snowball sampling method. The framework analysis of the study included 5 steps. Data were saturated after 21 semistructured interviews. The main findings included 3 main themes (supply management, insurance trusteeship, and financial performance) and 14 subthemes (strategic purchasing infrastructures, practical guidelines, trusteeship structure, service package, service quality, service quantity, role of other organizations and groups, training, establishment of an insurance thought, strategic management, communication, price, efficiency and effectiveness, and resource provision). The strategic purchasing model of health services increases the power of service purchasers and payment based on defined priorities, resulting in providers' coordinating for care provision, enhancement of financial performance and cancer patients' better access to health services, improvement of life quality, and financial protection.


Assuntos
Atenção à Saúde/organização & administração , Neoplasias/terapia , Aquisição Baseada em Valor , Atenção à Saúde/métodos , Teoria Fundamentada , Humanos , Seguro Saúde/organização & administração , Irã (Geográfico) , Pesquisa Qualitativa
9.
Artigo em Inglês | MEDLINE | ID: mdl-31797714

RESUMO

Breast cancer is the most common malignancy and the second leading cause of cancer deaths among women worldwide after lung cancer. Mitochondria play a central role in the regulation of cellular function, metabolism, and cell death in cancer cells. We aim to examine the mitochondrial polymorphisms of complex I in association with breast cancer in an Iranian cohort.This experimental study includes 53 patients with breast cancer and 35 healthy control patients. In addition, tumor-adjacent normal breast tissue was obtained from each patient. The DNA of the tissue cells was extracted and analyzed for complex I mutations using a PCR sequencing method. Our results show 94 mtDNA complex I variants in tumor tissues. A10398G was the most prevalent polymorphism and strongly correlated with Her2 receptor in tumor tissue samples. Mitochondrial DNA (mtDNA) mutations have been widely linked to the etiology of numerous disorders. The mtDNA mutations screening on A10398G along with other mutations might provide insight on the role of mitochondrial mutations in breast cancer.


Assuntos
Neoplasias da Mama/genética , DNA Mitocondrial/genética , Predisposição Genética para Doença , Mutação , Receptor ErbB-2/genética , Adulto , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único/genética , Fatores de Risco
10.
Caspian J Intern Med ; 10(4): 396-401, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31814937

RESUMO

BACKGROUND: Identifying the incidence of cancer helps in planning and prioritizing resources for its screening, prevention, treatment and diagnosis. This study aimed at investigating a 25-year trend in gastrointestinal cancer in northern Iran during 1991-2016. METHODS: This research was a trend analysis. The study population was one thousand five hundred and thirty-five cancer patients referring to Shahid Rajai Hospital in Babolsar, northern Iran, as the only center for radiotherapy in the North of Iran, during 1991-2016. SPSS version 22 was used for entering data and t-test, ᵡ2 and ANOVA were used for analyzing data in the significant level of ≤0.05. RESULTS: The highest incidence of stomach cancer was 111 (35%) in 2011 and the lowest incidence was 44 (16.3%) in 1996, The highest frequency of esophageal cancer was reported 137(56.1%) cases in 1991 and the lowest frequency was 78 (26.3%) cases in 2016, while the highest incidence of colorectal cancer was 109 (36.7%) cases in 2016 and its lowest frequency was 32 (16.3%) in 1996. There was also a significant difference in the frequency of gastrointestinal cancers in different studied years (p <0.001). CONCLUSION: The trends in the incidence of stomach and colorectal cancers in northern Iran were increasing while esophageal cancer was decreasing.

12.
Leuk Res ; 66: 85-88, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29407588

RESUMO

BACKGROUND: Acute promyelocytic leukemia (APL) is a curable form of acute myeloid leukemia; in recent years, the use of new treatment strategies, such as combination therapy, have led to improved APL outcomes. Here, outcomes of patients treated with a combination of arsenic trioxide (ATO) and all-trans-retinoic acid (ATRA) are compared against patients treated with single ATO therapy. PATIENTS AND METHODS: In total, 67 patients with non-high-risk APL were evaluated. A group of 30 patients received ATO, and another group of 37 patients received ATO plus ATRA. ATO infusion at a dose of 0.15 mg/kg/day was continued till complete remission was achieved or till 60 days of consumption, and after 28 days of rest, second ATO course was initiated for 28 days as consolidation. Four courses separated by 28-day rest were planned. In the second group, 45 mg/m2/day ATRA was added to ATO protocol. RESULTS: All patients except one in the ATO group and all patients in the ATO plus ATRA group were alive after a median follow-up of 18 and 17 months, respectively; 2.5-year overall survival in the ATO group was 86% (p-value = .32). Five patients in the ATO group experienced relapse, and 2.5-year leukemia-free survival in this group was 60%. No relapse occurred in the ATO plus ATRA group (p-value = .01). Differences in the mean of white blood cell (p-value = .67), platelet (p-value = .15), liver (p-value = .37), and renal (p-value = .95) dysfunctions were not significant. CONCLUSION: Although ATO has been considered a first-line therapy in patients with APL, several studies have reported improved outcomes with a combination of ATO plus ATRA. This study demonstrated a significant decrease in relapse with this combination compared with single ATO therapy and supported the importance of ATRA in APL treatment.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Quimioterapia de Indução , Leucemia Promielocítica Aguda/tratamento farmacológico , Leucemia Promielocítica Aguda/mortalidade , Adolescente , Adulto , Idoso , Trióxido de Arsênio/administração & dosagem , Intervalo Livre de Doença , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Taxa de Sobrevida , Tretinoína/administração & dosagem
13.
Ann Hematol ; 97(2): 327-334, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29150810

RESUMO

The aims of this study are to determine the replacement rate of damaged hepatocytes by donor-derived cells in sex-mismatched recipient patients with thalassemia major and to determine whether co-transplantation of mesenchymal stem cells and hematopoietic stem cells (HSCs) can alleviate liver fibrosis. Ten sex-mismatched donor-recipient pairs who received co-transplantation of HSCs with mesenchymal stem cells were included in our study. Liver biopsy was performed before transplantation. Two other liver biopsies were performed between 2 and 5 years after transplantation. The specimens were studied for the presence of donor-derived epithelial cells or hepatocytes using fluorescence in situ hybridization by X- and Y-centromeric probes and immunohistochemical staining for pancytokeratin, CD45, and a hepatocyte-specific antigen. All sex-mismatched tissue samples demonstrated donor-derived hepatocyte independent of donor gender. XY-positive epithelial cells or hepatocytes accounted for 11 to 25% of the cells in histologic sections of female recipients in the first follow-up. It rose to 47-95% in the second follow-up. Although not statistically significant, four out of ten patients showed signs of improvement in liver fibrosis. Our results showed that co-transplantation of HSC with mesenchymal stem cells increases the rate of replacement of recipient hepatocytes by donor-derived cells and may improve liver fibrosis.


Assuntos
Transplante de Células-Tronco Hematopoéticas , Hepatócitos/imunologia , Cirrose Hepática/terapia , Transplante de Células-Tronco Mesenquimais , Talassemia beta/terapia , Adolescente , Adulto , Antígenos de Neoplasias/genética , Antígenos de Neoplasias/imunologia , Biomarcadores/metabolismo , Biópsia , Criança , Células Epiteliais/imunologia , Células Epiteliais/patologia , Feminino , Células-Tronco Hematopoéticas/citologia , Células-Tronco Hematopoéticas/imunologia , Hepatócitos/patologia , Humanos , Hibridização in Situ Fluorescente , Queratinas/genética , Queratinas/imunologia , Antígenos Comuns de Leucócito/genética , Antígenos Comuns de Leucócito/imunologia , Cirrose Hepática/imunologia , Cirrose Hepática/patologia , Masculino , Células-Tronco Mesenquimais/citologia , Células-Tronco Mesenquimais/imunologia , Estudos Retrospectivos , Doadores de Tecidos , Quimeras de Transplante , Transplante Homólogo , Talassemia beta/imunologia , Talassemia beta/patologia
14.
Int J Hematol Oncol Stem Cell Res ; 11(1): 13-18, 2017 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-28286609

RESUMO

Background: Hemorrhagic cystitis (HC) is one of the most challenging complications in hematopoietic stem cell transplantation (HSCT). Estrogen is one of the suggested treatments for controlling this problem. Subjects and Methods: We performed a randomized case-control study to evaluate the efficacy of oral conjugated estrogen on HC management in 56 HSCT patients. Patients were randomly assigned to the drug group (received 6.25 mg conjugated estrogen oral tablets in a daily single dose during hematuria period) or control group. Results: The median time to complete response was 36 and 24 days in the drug and control group, respectively. The median time of down stage was 24 days in the drug group and 12 days in control group. Adjusted for HC grades, the relative risk of complete response for patients in control group was 1.613 times more than that of patients in drug group; nevertheless, not significant (p=0.122). Conclusion: Our study did not show any benefit in use of oral conjugated estrogen in the management of HC.

15.
Hematol Oncol ; 35(1): 101-105, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26386260

RESUMO

For finding better method of acute myeloid leukaemia (AML) induction, we designed a prospective clinical trial to find a more effective regimen with least toxicity for induction therapy of AML. Hence, we examined different accepted doses of daunorubicin and their outcomes. Total of 114 patients were included in the study. Fifty-five patients received 60 mg/m2 of daunorubicin (arm 1) 1 h IV infusion for 3 days, and the remaining 59 received 80 mg/m2 (arm 2) 1 h IV infusion for 3 days. Continuous infusion of 100 mg/m2 /day of cytosine arabinozide IV for 24 h for 7 days was given in both groups. Complete remission rate was 77.78% in group 1 and 76.92% in group 2 (p = 0.92). One-year overall survival was 55.85% [standard error (SE) = 8.05%] in arm 1 and 57.94% (SE = 7.32%) in arm 2. Median follow-up time was 11.1 (SE = 1.43) and 10.28 (SE = 1.29) months, respectively. One-year disease-free survival was 64.41% (SE = 7.39%) in arm 1 and 54.86% (SE = 7.53%) in arm 2. Complete remission, overall survival and disease-free survival were statistically the same in both groups (p = 0.92, 0.697, 0.31). Toxicity and safety profile were similar in two groups but need to transfusion was higher in arm 2. Febrile neutropenia, days of antibiotics consumption and invasive fungal infection prevalence did not show any difference. Mean transfused packed cells and platelets rate were higher in the group that received higher dose of daunorubicin. Considering these results, we found that 60 mg/m2 of daunorubicin would be more rational and as effective with lower toxicity to 80 mg/m2 in induction therapy of AML patients at least as scheduled in our trial. Copyright © 2015 John Wiley & Sons, Ltd.


Assuntos
Antibióticos Antineoplásicos/administração & dosagem , Daunorrubicina/administração & dosagem , Leucemia Mieloide Aguda/tratamento farmacológico , Adolescente , Adulto , Aberrações Cromossômicas , Citarabina/administração & dosagem , Intervalo Livre de Doença , Relação Dose-Resposta a Droga , Esquema de Medicação , Neutropenia Febril/complicações , Feminino , Seguimentos , Humanos , Estimativa de Kaplan-Meier , Leucemia Mieloide Aguda/mortalidade , Masculino , Pessoa de Meia-Idade , Micoses/complicações , Micoses/prevenção & controle , Neutropenia/prevenção & controle , Prevalência , Estudos Prospectivos , Indução de Remissão , Resultado do Tratamento , Adulto Jovem
16.
J Med Biochem ; 34(4): 402-408, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28356848

RESUMO

BACKGROUND: Oxidative stress induced by superoxide anion plays critical roles in the pathogenesis of coronary artery disease (CAD) and hence acute myocardial infarction (AMI). The major source of superoxide production in vascular smooth muscle and endothelial cells is the NADPH oxidase complex. An essential component of this complex is p22phox, that is encoded by the cytochrome b-245, alpha polypeptide (CYBA) gene. The aim of this study was to investigate the association of CYBA variants (rs1049255 and rs4673) and premature acute myocardial infarction risk in an Iranian population. METHODS: The study population consisted of 158 patients under the age of 50 years, with a diagnosis of premature AMI, and 168 age-matched controls with normal coronary angiograms. Genotyping of the polymorphisms was performed by the polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP). RESULTS: There was no association between the genotypes and allele frequencies of rs4673 polymorphism and premature acute myocardial infarction (P>0.05). A significant statistical association was observed between the genotypes distribution of rs1049255 polymorphism and AMI risk (P=0.037). Furthermore, the distribution of AA+AG/GG genotypes was found to be statistically significant between the two groups (P=0.011). CONCLUSIONS: Our findings indicated that rs1049255 but not rs4673 polymorphism is associated with premature AMI.

17.
Bioinformation ; 10(4): 187-90, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24966518

RESUMO

Polycomb Repressive Complex2 maintains a predetermined state of transcription which constitutes a cellular memory stable over many cell divisions. Since this complex acts through the regulation of chromatin structure, it is important to understand how it is recruited to chromatin. The specific target sequences of this complex such as PRE (polycomb repressive element) have not been completely recognized in human genome. In this study, we have compared the target sequences of this complex with non-target genes in tumor cell lines. Through in silico and statistical analyses, we have identified some motifs which are over-represented in target genes against non-target genes. Analyzing these motifs shows some transcription factors which are potential recruiters of Polycomb repressive complex2.

18.
Artigo em Inglês | MEDLINE | ID: mdl-24800032

RESUMO

Allogeneic Hematopoietic stem cell transplantation (HSCT) is the most effective therapy to prevent relapse in acute lymphocytic leukemia (ALL). This benefit is affected by non-relapse mortality (NRM) due to complications such as graft versus host disease (GVHD). A new approach in analyzing time-dependent covariates in competing risks is landmark analysis. So, the aim of this study is to evaluate the effect of acute and chronic GVHD on long-term outcomes, relapse and NRM, after allogeneic HSCT in adult ALL using landmark analysis. This study was conducted on 252 ALL patients who were allogeneic transplanted from an HLA-identical sibling with peripheral blood (PB) as the source of stem cell from 2004 to 2012 and were followed-up until 2013. In the first 100 days after transplant, a landmark analysis on days +10, +11, +12, +17, +24, and +31 was applied to assess the effect of acute GVHD on early relapse and NRM. Similarly, for patients alive and event-free at day +100 after transplant, a landmark analysis at time points day +101, months +4, +5, +6, +9, and +12 was applied to evaluate the effect of chronic GVHD on late relapse and NRM. Five-year LFS and OS were 35.0% (95% CI: 29.1, 42.2%) and 37.5% (95% CI: 31.3, 45.0%), respectively. Five-year cumulative incidence of relapse was 44.5% (95% CI: 37.9, 51.0%) while this was 20.4% (95% CI: 15.4, 26.0%) for NRM. The landmark analysis in the first 100 days after transplant showed that the grade III/IV of aGVHD has a lower risk of relapse but higher risk of NRM after adjustment for the EBMT risk score. For patients alive at day +100, cGVHD had no significant effect on relapse. Limited cGVHD had lower risk of NRM and after 6 month post-transplant the risk of NRM decreased and there were not important difference between the groups of cGVHD. Using advanced models enables us to estimate the effects more precisely and ultimately make inference more accurately.

19.
Artigo em Inglês | MEDLINE | ID: mdl-24800033

RESUMO

INTRODUCTION: Esophageal and gastric cancers are among the most common cancers in Iran. Usually survival of these cases is poor despite of treatment. Here we studied outcome of these cases in our center to have an estimation of general prognosis of patients. METHODS: In this retrospective study, we reviewed the data of patient's files before treatment, including cancer stage at diagnosis, types of treatments and outcomes. We studied 368 patients treated between 1995 and 2011. RESULTS: The study included 368 patients (248 [67.4%] males and 120 [32.6%] females) with a median age of 58 (range: 23 - 94). Sixty nine patients (18.8%) had esophageal cancer with a median age of 58.5 years (range: 33 - 84), and 47.8% (33/69) of whom were male. Sixty five (17.7%) were reported to have gastro-esophageal junction (GEJ) with a median age of 62.0 (range: 32 - 94), among them 72.3% (47/65) of whom were male and finally Two hundred thirty four (63.6%) had gastric cancer with a median age of 57.0 (range: 23 - 82), which 71.8% (168/234) of whom were male. The Median follow-up was 10 months. The majority of patients were diagnosed at an advanced stage of disease. Stage III or IV was observed in 65.0% (39/60) of patients with esophageal cancer, 75.0% (33/44) with GEJ cancer and 65.4% (121/185) with gastric cancer. In this study, 58% of patients with esophageal cancer, 50.8% with GEJ and gastric cancers had unresectable disease or metastases at presentation. One-year EFS was 51.8% (95% CI: 39.8 - 67.3%), 32.8% (95% CI: 22.1 - 48.7%), and 56.7% (95% CI: 50.1 - 64.3%) in patients with esophageal, GEJ and gastric cancers, respectively (p = 0.002). The 1-year OS was 54.5% (95% CI: 42.6 - 69.8%), 39.5% (95 CI: 28.1 - 55.5%), and 68.2% (95% CI: 61.8 - 75.3%), respectively (p < 0.001). CONCLUSION: Cancers of the upper gastrointestinal (GI) tract contribute to the high mortality and morbidity rates because they are more likely to be diagnosed at late or advanced stages of disease. Cancer of the GEJ has a poor prognosis compared to esophageal and gastric cancers. Moreover, treatment protocols may need improvement to achieve better results.

20.
Int J Hematol Oncol Stem Cell Res ; 8(3): 1-11, 2014 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-25642302

RESUMO

The aim of this study was to assess the predictive effect of the EBMT risk score on the outcomes of allogeneic stem cell transplantation in a relatively homogenous group of acute myelogenous leukemia (AML) patients regarding the occurrence of acute and chronic graft versus host disease (GVHD). This historical cohort study included adult patients (≥ 15 years old) with AML (n=363) who received allogeneic peripheral blood stem cell transplantation from HLA-identical sibling donors in the first or higher complete remission following myeloablative conditioning regimens between 2004 and 2011.The patients recruited in this study were followed-up until January 2013. Patients with acute promyelocytic leukemia (APL) were excluded from the study. Early outcomes until day +100 and events after day +100 were regarded for acute and chronic GVHD, respectively. A multi state model for competing risks was applied. We found that the EBMT risk score was a good predictor for overall survival (OS) and relapse incidence; however, it was not associated with transplant-related mortality (TRM). The EBMT risk score was not associated with acute and chronic GVHD. For early outcomes, the predictive effect of the EBMT risk score was not statistically significant in the presence of acute GVHD; however, in the presence of chronic GVHD, it was a significant predictor of relapse but not for TRM. It seems that the effect of EBMT risk score on OS and relapse incidence cannot be affected by GVHD. Although the results were insignificant, there was evidence that the EBMT risk score can predict early outcomes, while for late outcomes, it works well for relapse and OS but not for TRM.

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