مجله دانشکده پزشکی اصفهان
پیاپی 133 (هفته اول خرداد 1390)

• Utilizing an intact RNA is essential while performing molecular genetics methods like microarray and quantitative Real-time polymerase chain reaction (RT-PCR). Using RNA with poor quality may affect the results of downstream manipulations. Our aim in the current study was to compare and optimize various procedures for RNA extraction by using different kits and DNase treatment to find a standard method for RNA extraction from human frozen tissues.• Using Cinnagen RNX plus solution, Qiagen RNeasy Mini Kit and Qiagen RNeasy Plus Mini Kit, total RNA was extracted from human frozen tissues comprising stomach (#40), glioma (#5) and breast (#15). For genomic DNA elimination, extracted RNA was treated with DNase enzyme. After RNA extraction, its quantity and quality was assessed by spectrophotometry and gel electrophoresis. After cDNA synthesis, RT-PCR technique by specific primers designed for TBP gene was performed and results were assessed by agarose gel electrophoresis.• Extracted RNA by Cinnagen RNX plus solution did not show good results in RT-PCR after DNase treatment. Extracted RNAs by Qiagen RNeasy Mini Kit and Qiagen RNeasy Plus Mini Kit were of high quality for RT-PCR reaction because of using DNase treatment during the extraction procedure and an additional genomic DNA elimination column respectively.• Combining Qiagen RNeasy Mini Kit, Qiazol solution and DNase treatment during the extraction procedure is the most suitable method for RNA extraction from human frozen tissues and the extracted RNA can be used with assurance in downstream molecular techniques.

Candidiasis is a widespread fungal disease caused by different candida spp. Traditional methods for these yeasts, are time-consuming and in some cases are not successful. New molecular techniques based on differences in DNA targets are faster and more useful. The aim of this study was identification of the most medically common Candida species by PCR-RFLP analysis and their prevalence in Isfahan, central Iran.

Yeast genomic DNA was extracted from living cultures using FTA-filters and ITS1-ITS2 region was amplified by PCR and was digested by the restriction enzyme MspI. RFLP products were loaded on agarose gel and yeast species were identified acorging to differences in their band patterns.

One hundered and eighty two isolates were evaluated from different body locations comprising nail, vagina, groin, blood, wound etc, from which 86 isolates (47.2%) were identified as C. albicans, 31 (17%) as C. parapsilosis, 19 (10.4%) as C. kefyr, 15 (8.2%) as C. tropicalis, 14 (7.7%) as C. glabrata, 14 isolates (7.7%) as C. krusei, 3 isolates (1.6%) as C. guilliermondii. Totally 47.2% isolates were C. albicans and 52.8% isolates were non-albicans spp.

Increasing of non-albicans species and their more resistance to antifungal drugs than C. albicans is an important topic of fungal infections that needed precise epidemiological surveys. This study can be a leader for more applicable studies.

Limited studies have shown that the administration of Bromocriptine leads to clinical improvement in a number of rheumatic patients. Low price of Bromocriptine and its trivial side effects lead the authors to investigating the effect of Bromocriptine on rheumatoid arthritis (RA) disease activity. In a randomized controlled double-blinded quasi-experimental study the effectiveness of Bromocriptine in treating rheumatoid arthritis was evaluated. 80 patients were divided in two groups (experiment and placebo. The inclusion criteria were the presence of active rheumatoid arthritis (DAS > 3.2) in spite of medical treatment. In addition to the standard medications, the case group received single oral doses of 5 mg bromocriptine and the control group received placebo tablet and were followed up for three months. Independent T-test was used to compare DAS28 in the two groups. P < 0.05 was considered significant. The mean ages of the experiment and placebo groups were 46.2 ± 13.0 and 45.9 ± 12.5 respectively. Before the starting pf the intervention in the experiment group, the mean values of PRL and DAS were 11.7 ± 6.9 and 4.2 ± 1.2, and the mean values of PRL and DAS in the placebo group were 11.3 ± 6.2 and 4.6 ± 1.4 respectively (P > 0.05). After the intervention the mean values of serum PRL level and DAS in the experiment group were 10.6 ± 7.1 and 3.7 ± 1.3 respectively, that were different with those of before the intervention (P < 0.05). Our findings suggest that Bromocriptine might be effective in decreasing the rheumatoid arthritis disease activity index, without any concerns about side effects.

Photorefractive keratectomy or PRK is a good way to correct mild, moderate and severe myopia and astigmatism. Because of several reports about the sight threatening of Hyperopic PRK, it’s effectiveness is less known. This study was done to characterize the refractive changes after excimer laser PRK for correction of hyperopia > 3 diopters and to assess refractive state and changes in astigmatism after 1year.

In an interventional study, thirty eyes of nineteen patients were participated. Their mean refractive error was +5.45 diopters and mean astigmatism was -1.42D. All of the patients were treated by Technolas 217-z excimer laser. Post operative SE (sphere equivalent), UNCVA (uncorrected visual acuity), BCVA (best corrected visual acuity) and all of the complications examined at 12 months later.

The mean post operative refraction was +1.00D (range-2.00 to +5.00), the mean SE was 0.55D and mean astigmatism was -0.95D (range -0.25 to-2.00D). Mean BCVA was unchanged or improved in 83.4% of cases (pre op log MAR = 0.10 and post op log MAR = 0.11) but five eyes (16.6%) lost 1 or 2 lines of snellen BCVA. In 46.6% refraction was within +/-1.00D and 80% was within +/-2.00 from target refraction. The grade corneal haze in eighteen eyes (66%) was 0 or 0.5 and in one eye was 3 and neither developed to grade 4.

Hyperopic PRK has a low predictability for high hyperopia but it is effective for low hyperopia. We do not recomended PRK in highly hyperopic-astigmatic eyes.

Primary malignant tumors of the chest wall are rare and include about 5 percent of all chest wall tumors. Primary osteosarcoma of the rib has very low prevalence and mostly exists in young age. Case Report: We present a 70-year-old man with a very large tumor of the chest wall, becoming gradually larger, for about 30 years. It underwent resection and reconstruction and was reported to be well differentiated osteosarcoma in pathological study.