M Doosty, H Shirvany,
Volume 56, Issue 1 (30 1998)
Abstract
The function of Helicobacter pylori (H.pylori) is confirmed as one of the factors which motivates gastric and duodenal ulcer and gastritis. Various methods are used to diagnose the infection. Serological tests are the easiest and most harmless for the patients. Probably, H.pylori strains in Iran are different from the strains in other countries. Hence, it seems neccessary to design a specific serological test to recognize and identify different strains of bacterial antigenic proteins of Iranian patients.
Since the most manifest and specific to these bacterial antigens are the "Outer Membrane Protein" (OMP), therefore, the first necessary step is to separate and purify H.pylori OMP and then to identify antigenic proteins.
In this study, we received bacteria colony that belonged to 15 patients with gastric or duodenal ulcer, which had been growed in blood agar or brucella broth. After processing such as washing, freezing and defreezing, sonicating, centrifugation with high speed (10,000 g) and treatment with sarcosyl, the sarcosyl insoluble fraction was extracted. Sodium Dodecyl Sulfate - Poly Acrylamide Gel Electrophoresis (SDS-PAGE) was preformed. From all 15 OMP specimens, we isolated protein bands.
The first two bands with higher MW, were major bands and the two lighter bands were the minor bands. Approximate MW of these 4 proteins are equal to 67000, 61000, 30000 and 17000 dalton
Arezoo Kazemzadeh, Iraj Abedi, Alireza Amouheidari, Atefeh Shirvany,
Volume 78, Issue 9 (December 2020)
Abstract
Background: To date, different kinds of treatment methods have been proposed for radiotherapy of cancer patients. Choosing the kind of treatment method affects the quality of the patient's treatment. This study aims to investigate the effect of the number of radiation treatment sessions on the dose received by the patient and the distribution of tumor dose and dose received by organs at risk in breast cancer radiation therapy. These results help us to select the appropriate treatment schedules for the treatment of left breast patients.
Methods: This prospective cross-sectional study was performed on the treatment plans of 35 patients with left breast cancer who referred to Isfahan Milad Hospital between July 2019 and April 2020. They were candidates for left breast radiation therapy. Also, these patients had no history of surgery or chemotherapy, and no supraclavicular or axillary lymph nodes were involved. Patients were treated with a conventional fraction regimen (CF) or hypofractionated (HF) treatment schedule. Different dosimetry parameters for the target and organ at risks such as conformity index, homogeneity index and mean dose were obtained from the dose-volume histogram plot. Finally, the results of both plans were compared with each other.
Results: The data obtained from this study indicate a decrease in the average dose of all organs in the hypo fractionated regimens compared to conventional plans. The differences between two plans were statistically significant for tumor, lung, and skin (P=0.0). Moreover, the maximum dose for the skin was also reduced when hypofractionated regimens were used. However, the values of the homogeneity index and conformity index of tumor in the two methods did not show a significant difference (P were 0.99 and 0.86, respectively).
Conclusion: In general, the results of the current study indicate that the hypofractionated regimen leads to a reduction in dosimetric factors compared to conventional fraction plans. It seems that this method can be used as an alternative treatment plan for breast cancer radiation therapy due to the reduced duration of the treatment period. |
