Impaired spermatogenesis caused by busulfan is partially ameliorated by treatment with conditioned medium of adipose tissue derived mesenchymal stem cells.

Busulfan (BSU) is a chemotherapeutic drug that can cause subfertility or sterility in males. We investigated the effects of adipose tissue-derived mesenchymal stem cells (AT-MSC) conditioned medium (CM) (AT-MSC-CM) on histopathological and molecular characteristics of mouse testes exposed to BSU using stereology. We used adult male mice divided randomly into five groups: control, Dulbecco's modified Eagle's medium (DMEM), dimethyl sulfoxide (DMSO), BSU, and BSU + CM. Thirty-five days following BSU injection, sperm and testis tissues were harvested for stereological and molecular studies. The BSU group exhibited significantly reduced testis volume, interstitium and tubules compared to the other groups, although the volume of the testis remained unchanged for BSU and CM groups. The number of testis cells was reduced in the BSU group compared to the other groups. The CM group exhibited a significantly increased number of testis cells compared to the BSU group. Sperm count and motility, and length density of seminiferous tubules were increased in CM group compared to the BSU group. AT-MSC-CM exhibited ameliorative effects on histopathologic changes of mouse testes exposed to BSU.

Comparison of detection percentage and morphology of myocardial bridge between conventional coronary angiography and coronary CT angiography.

Introduction: Myocardial bridge (MB) is a congenital anomaly in which a segment of a coronary artery is surrounded by myocardium. In our study, we want to use conventional coronary angiography (CCA) to describe morphologic characteristics of MB (unidentified or identified) in the patients with documented evidence of MB in coronary computed tomography angiography (CCTA). Methods: The present study was designed as cross-sectional and was conducted on 47 patients with documented evidence of MB in CCTA, who were referred to Nemazee and Faghihi hospitals for performing coronary angiography during a one year period. We compared the morphologic characteristics of tunneled segments, which were missed at CCA (unidentified), and the tunneled segments which were identified with CCA. Results: In sum, MB was found in 16 (34%) patients at CCA (identified), and it was not found in 31 (66%) patients (unidentified) based on compression sign. No significant correlation was found between the percentage of systolic compression and the length and depth of the tunneled segment in identified group (r=0.73, P = 0.18; r=1.09, P = 0.15; respectively). Degree of atherosclerotic plaque formation (diameter stenosis, percentage) (mean, 0.25 (25%) ±0.29; range, 0-0.98) of the tunneled segments in unidentified group was significantly more than the same degree (mean, 0.07 (7%) ±0.13; range, 0-0.41) of the identified group (P = 0.03). The measurement of the trapezoid area under the tunneled segment with this formula [(MB length+ intramyocardial segment) ×depth/2] had significant relation with systolic compression (r=0.304, P = 0.03) and defined the cut-off value of 250 mm2 as the value of significant difference in detecting myocardial bridging with CCA. Conclusion: Our results showed that in most of identified MBs in CCA the tunneled segment area was equal and more than 250 mm2. In addition, the degree of atherosclerotic plaque of the tunneled segments at CCA was significantly more in unidentified group.

The Effects of Acupressure on Pain Severity in Female Nurses with Chronic Low Back Pain.

BACKGROUND: Low back pain causes physical and psychological impacts among nurses. This study aimed to investigate the effects of acupressure on the severity of pain in chronic low back pain in female nurses. MATERIALS AND METHODS: This study is a single-blinded randomized clinical trial conducted among 50 nurses suffering from chronic low back pain. After simple sampling, participants were randomly assigned into acupressure and sham groups using lottery method (25 patients in each group). In the experimental group, the intervention was performed by the researcher three times a week throughout a 3-week period. The sham group received placebo interventions. Data was collected through VAS questionnaire before, immediately after, 2 weeks, and 4 weeks after performing intervention. Data analysis was conducted using SPSS version 18 using descriptive and inferential statistical methods. RESULTS: There was no significant difference in the mean pain severity scores in the pre-interventions phase between the groups (P = 0.63), however, a significant difference was observed Immediately, 2 weeks, and 4 weeks after performing intervention. Further, the mean pain severity scores in intervention group significantly decreased compared to the sham group (P = 0.000). CONCLUSIONS: Acupressure on specific points was proved to reduce pain. Thus, acupressure can be used as nonmedicament, inexpensive, and without side effects treatment in reducing pain.

The effect of acupressure on fatigue among female nurses with chronic back pain.

AIM: To investigate the effect of acupressure on fatigue among female nurses with chronic back pain. BACKGROUND: Chronic back pain is one of the most common problems among nurses and has numerous physical and psychological effects. One of these effects is fatigue that impairs an individual's life. MATERIALS AND METHODS: This randomized single-blind clinical trial was conducted on 50 nurses with chronic back pain working at the selected hospitals in Isfahan, Iran. After convenient sampling, the subjects were randomly allocated, through lottery, to the two groups of experimental (n=25) and sham (n=25). In the experimental group, acupressure techniques were performed during 9 sessions, 3 times a week for 14min for each patient. In the sham group, points within 1cm of the main points were only touched. Data were collected using the Fatigue Severity Scale (FSS), before, and immediately, 2weeks, and 4weeks after the intervention. Data analysis was performed using SPSS software. RESULTS: The mean score of fatigue severity before the intervention was not significantly different between the two groups (P=0.990). However, it was significantly lower in the experimental group than the sham group immediately (P<0.001), 2weeks (P=0.005), and 1month after the intervention (P<0.001). CONCLUSIONS: Acupressure on specific points of the foot and back improves back pain so, reduces fatigue. Therefore, acupressure can be used as a drug-free and low-cost approach without side effects to improve fatigue in nurses with chronic back pain.

Rapid synthesis of flower-like ZnO nanostructures.

Flower-like ZnO nanostructures were prepared via microwave assisted heating in the presence and absence of ionic liquid (IL). X-ray diffraction analysis (XRD), Scanning electron microscopy SEM and room temperature photoluminescence (PL) spectra have been employed for characterization of the products. The SEM image illustrates the surface of flower-like ZnO prepared in the presence of IL is not smooth and consists of nanoparticles with grain size of about 48 nm. PL spectra of flower-like ZnO in absence and presence IL reveal similar photoluminescence features: a strong UV, weak blue and green-yellow emissions peak at a bout 393 nm, 448 nm and 583 nm respectively. The strong UV photoluminescence and the weak green emission indicate the good crystallization quality of the flower-like nanostructure. The results show that imidazolium-based IL can be used as template for achieving very high level control over the size and shape of nanostructures. The approach developed in this work can potentially be used as a viable method for making various other uniform nanostructures in the presence of IL. This method is simple, fast, low-cost and suitable for large-scale production of ZnO nanostructures.