مجله پزشکی دانشگاه علوم پزشکی تبریز
سال چهل و سوم شماره 3 (پیاپی 153، امرداد و شهریور 1400)

Paroxetine is one of the well-known antidepressants. Recent studies have focused on paroxetine’s probable immuno-modulatory effects, since findings have indicated inflammation’s role in the pathophysiology of depression. Therefore, in the present study, TLR2 and TLR4 mRNA genes expression was assessed in paroxetinetreated peripheral blood mononuclear cells (PBMCs).

Venous blood samples were drawn from five healthy men (20-40 years old). Peripheral blood mononuclear cells (PBMCs) were isolated from samples and were cultured. After the first incubation for 24h, phytohemagglutinin plus lipopolysaccharide were added to the cells and then were incubated for 24h. Thereafter, cells were treated with different concentrations of paroxetine in the presence or absence of inhibitors of 5-HT2 and 5- HT7 receptors. After incubation for 48h, RNA was extracted and cDNA was synthesized. Using the real-Time PCR technique, TLR2 and TLR4 genes mRNA expression were evaluated. Statistical analysis of data were carried out using GraphPad Prism 7.

TLR2 and TLR4 mRNA expression were significantly increased in response to paroxetine at all concentrations. Furthermore, the co-culture of cells with the drug and the 5-HT2R and 5HT7R inhibitor simultaneously revealed that paroxetine’s immuno-modulatory effects via TLR2 are dependent on serotonin, while it is independent of serotonin in the case of TLR4.

Considering paroxetine’s effect in modulating immune responses via increasing TLR2 and TLR4 expression, paroxetine could have therapeutic potentials in diseases with a deficiency in these receptors.

Patent Ductus Arteriosus (PDA) is considered one of the most prevalent types of congenital heart disease. The closure of the ductus arteriosus physiologically occurs at the first 48-72 hours after the birth in healthy term infants. Different causes can result in the pathological opening of ductus arteriosus. This study aims to investigate the effect of oral acetaminophen on the closure of PDA in preterm neonates.

The present study is a trial without control. Forty-five preterm neonates with a gestational age of <32 weeks were studied. Acetaminophen was orally administered with a dose of 10mg/kg every 6 hours for three days. Closure of ductus arteriosus was considered as the success of treatment. Data were analyzed using SPSS 15. Data were reported as )frequency-percent) and mean ± SD. To evaluate the normal distribution of data, we used a Kolmogorov-Smirnov test. Statistical significance was defined as P<0.05.

The study population consisted of 20 male and 25 female infants with the mean gestational age of 28.95 ± 1.66 weeks. Cesarean-born infants and vaginal-born infants consisted 17.8% and 82.2% of the study population, respectively. The proportion of PDA closure after administration of oral acetaminophen was 82.3%.

The current study indicates that oral acetaminophen is highly effective in closing PDA. Considering its trivial side effects, it has the potency to be a convenient option for treating this condition.

Attention deficit hyperactivity disorder (ADHD) is the most common and highly heritable psychiatric disorder among children which affects 3-7% of them all around the world. ADHD characterized by some symptoms such as extreme and inappropriate levels of motor activity, impulsivity and inattentiveness. Several studies have reported the association between dopaminergic pathway and ADHD. Dopamine D4 receptor gene and its variants is one of the major candidates that have been studied for ADHD. Here we investigated the genetic association between DRD4 rs1800955 polymorphism and ADHD among children from Northwest of Iran.

This case-control study includes 200 ADHD children and 157 controls aged 6-12 years. ADHD children were diagnosed according to DSM-IV and Conners scale and were genotyped by PCR-Restriction fragment length polymorphism (RFLP) technique.

Frequencies of genotypes CC, TT and CT were 48 (24%), 15 (7.5%) and 137 (68.5%) in patient group and 50 (31.85% %), 7 (4.46%) and 100 (63.69 %) in control group respectively. According to results, there was no significant association between case and control groups (p>0.05).

The results of this study indicate that there is no significant association between DRD4 rs1800955 polymorphism and attention deficit hyperactivity disorder among children from Northwest of Iran.

The presence of toxicogenic fungi and the production of ochratoxin in flour are dangerous to human health. Therefore, identification of these fungi by molecular and precise methods is essential. The aim of this study was molecular identification of fungal species and investigation of ochratoxin A contamination in flours used in bakeries in Hamadan

In this descriptive-analytical study, 60 flour samples were collected from bakeries in Hamadan. At first, fungi were identified using phenotypic methods such as slide culture. Then, the genus and species of fungi were confirmed by PCR and sequencing of PCR products. ELISA method was used to detect ochratoxin A. Data were analyzed with GraphPad software version 6.

Of the 60 samples, 28 flour samples (46.66%) were free of fungal contamination and 32 flour samples (53.33%) were over fungal contamination (104 colonies/gr). Aspergillus and penicillium were the most abundant in samples. The prevalence of fungi in flour of Lavash bread, Sangak Bread, Barbari bread, Taftoon bread (Handmade), Taftoon bread (Machinal made), Stokbrood bread and Loaf bread were 50%, 46%, 35%, 31%, 26%, 18% and 11%, respectively. However, the highest levels of ochratoxin A were reported in flour of Lavash bread (3.98 ppb) and the lowest in Loaf bread (0.66 ppb). There was also a significant relationship between the fungal species and the amount of ochratoxin A production in flour of beards.

While phenotypic and genotypic methods did not show the same sensitivity, the presence of ochratoxin in the studied flours indicated the necessity of modification in wheat storage and bakery flours.

Self-curing acrylic resins, mainly composed of Polymethyl Methacrylate (PMMA), are widely used to manufacture removable orthodontic appliances. Self-curing acrylic resins have higher porosity than heatcuring acrylic resins leading to a susceptible place for microbial plaque colonization. Due to some of these microorganisms' activities, a very unpleasant odor is emitted from orthodontic base plates, which has adverse effects on patients' cooperation. This study aimed to investigate the antimicrobial properties of cold-curing PMMA acrylic resin containing ZnO nanoparticles supported in 4A zeolite and evaluating its mechanical properties.

The synthesized nanocomposite ZnO/4A zeolite was added to SR Triplex® Cold orthodontic selfcuring acrylic resin powder with 2wt% and 4wt% concentrations. X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), energy dispersive X-ray (EDX), MAP analysis, and Dynamic light scattering (DLS) were performed to investigate the sample's characteristics. Direct test method was used to assess the antibacterial properties of the fabricated acrylic samples against three bacterial strains Streptococcus mutans, Klebsiella Pnemoniae, and Esherichia coli. Flexural strength was evaluated by a three-point bending test, and Oneway ANOVA and Tukey's post hoc test were used for statistical evaluation of data. The p-value of less than 0.05 was considered significant.

The addition of ZnO/4A in 2wt% and 4 wt% concentrations lead to more than 99% destruction of colonies in all three types of microorganisms. The mean flexural strength of acrylic specimens containing 2wt% and 4wt% of ZnO/4A significantly lower than the control group. Despite the considerable reduction, all mean values are greater than 50 MPa.

The ZnO/4A zeolite nanocomposite due to its potent antibacterial properties and minimal toxicity can reduce the unfavorable odor of orthodontic base plates consequently increases patient cooperation and reaching the desired result.

Spine pain is one of the most common and costly health problems in developed countries. The purpose of this study was to analyze the structural equation modeling the effect of resilience and pain coping strategies on pain perception in patients with spinal pain: mediated by psychological symptoms.

This study was a correlation study using structural equation modeling. The statistical population of the study was all patients with spinal pain referred to Shams Hospital in Tabriz in 2018, estimated to be 750 patients. The statistical sample of the study was 254 people selected by available sampling based on Krejcie and Morgan’s table. The data gathering tool was the SCL-90 questionnaire, Pain Coping Strategies Questionnaire, Resiliency Scale, and new questionnaire (MPQ). The data were analyzed using structural equation test in Amos software and Bootstrap test.

The results of structural equation modeling analysis showed that direct paths from irradiation to pain perception (β=0.000, P<0.01) were significant. There is a direct correlation between coping strategies and pain perception (β=0.31, P<0.01). There is an indirect relationship between vibration, psychological symptoms, and pain perception (β=0.139, P<0.01) There is an indirect relation between coping strategies, psychological symptoms, and pain perception (β = 0/25, P<0.01)

It is recommended to develop a comprehensive care plan for patients with spinal pain by enhancing resilience and coping strategies to reduce the level of psychological symptoms in these patients.

Metastasis of aerodigestive tract cancers to cervical lymph nodes is one of the otolaryngologists’ concerns that relies on a variety of factors such as the size of the primary tumor and its spread. We aimed to study the prevalence of occult cervical metastases in patients with clinical N0 neck in oral cavity squamous cell carcinoma.

In this cross-sectional analytic study, the researchers referred to the archive of Emam Reza Hospital and studied medical files of patients with a definite diagnosis of oral cavity squamous cell carcinoma admitted from April 2011 to April 2016 while collecting relevant data such as age, gender, size of the primary mass, place of the lesion, clinical and pathological nodal involvement. The data was analyzed employing SPSS 19 whereas the statistical significance level in all exams was set at 0.05.

Average age of participants was 61.67 ± 14.02, and they were mostly male. Forty-five percent of participants had a clinical N0 neck and the majority of them didn’t have metastasis in the pathological study. The prevalence of metastatic lymph nodes in patients with clinical N0 was 30%. No significant relationship was observed between the number of lymph nodes containing occult metastasis and T of the tumor (P = .578).

In squamous cell carcinoma of oral cavity, the prevalence of metastatic lymph nodes in the neck is 30% and is significantly related to the location of the lesion while no significant relationship to T of the tumor is observed.

Due to the critical and important structures in the thorax, transsternal surgery on thoracic vertebrae is very complex and rarely performed. We report a case of successful transsternal surgery on thoracic vertebrae. In this study, a 27-year-old man presented to the hospital with progressive lower extremity complaints. Pathologic lesions and severe destruction of the T3 vertebra were diagnosed. Considering the location of the lesion, an anterior approach was performed. The results of this operation have been very successful and have some noteworthy points. In this study, transsternal surgery is supported in patients with anterior vertebral conditions.