فهرست مطالب arezoo saberi

Spinal cord injury (SCI) is a complex, multifaceted, progressive, and yet incurable complication that can cause irreversible damage to the individual, family, and society. In recent years strategies for the management and rehabilitation of SCI besides axonal regeneration, remyelination, and neuronal plasticity of the injured spinal cord have significantly improved. Although most of the current research and therapeutic advances have been made in animal models, so far, no specific and complete treatment has been reported for SCI in humans. The failure to treat this complication has been due to the inherent neurological complexity and the structural, cellular, molecular, and biochemical characteristics of spinal cord injury. In this review, in addition to elucidating the causes of spinal cord injury from a molecular and pathophysiological perspective, the complexity and drawbacks of neural regeneration that lead to the failure in SCI treatment are described. Also, recent advances and cutting -edge strategies in most areas of SCI treatment are presented.  Level of evidence: I

Although numerous pharmacological effects of Shilajit have been explored by extensive experiments, there is no study on the effects of this ayurvedic substance on the mRNA level of NF-κB family members (p50 and RelB) and IKK subunits (IKKα and β), in breast cancers. Accordingly, the objective of the current experiment was the mechanistic evaluation of the anti-tumoral potential of Shilajit against the breast cancer cell line (MCF-7). In this experimental study, the viability% of Shilajit (0, 100, 200, 400, 600, and 800 μg/mL)-treated cells was analyzed after 24, 48, and 72 h. In the following, the apoptotic rate and p50, RelB, and IKKα/β genes expression were assessed using flow cytometry and real-time PCR assays, respectively. Shilajit had a potent cytotoxic activity in a dose- and time-dependent manner with an IC50 of 280 μg/mL. Based on the Annexin-PI analysis, IC50 concentration of this compound induced significant apoptosis in the cells, possibly through suppression of NF-κB-regulated genes. The expression levels exhibited significant (P≤0.05) downregulation of these genes in the treatment group. The findings of the present experiment clearly indicate that Shilajit possesses promising anti- breast tumor activity through inhibition of IKK/NF-κB signaling pathway.

Hemodialysis catheter-related infections are associated with increased morbidity and mortality in end-stage renal disease patients. Here we present a case of an end-stage renal disease patient who presented with fever and weakness. During workup, we found a deeply inserted jugular vein double lumen catheter into the inferior vena cava that was complicated by infection.

There is an increasing concern over acute exposure of amphetamine and its derivative such as3,4-methylenedioxymethamphetamine (MDMA) on male reproductive toxicity. Supplementary vitamins canreduce the oxidative stresses and repair the damages on reproductive organs. This experimental study wasconducted to evaluate the effects of folic acid (FA) on reproductive indices, the antioxidant enzyme activities,and histological changes of testis on adult male rats treated by MDMA.

This experimental study was conducted on adult male Wistar rats. Animals were divided into 4groups: control, MDMA, FA, and MDMA + FA. Animals received a dose of 10 mg/kg of MDMA and 1 mg/kg ofFA for 7 or 14 days. Rats were anesthetized and sperm quality parameters (number, concentration, motility,and morphology), spermatogenesis indices [the mean seminiferous tubule diameter (MSTD), spermiogenesisindex (SI), repopulation index (RI), and tubular differentiation index (TDI)], changes on testicular structure,antioxidant enzyme activities of catalase (CAT), superoxide dismutase (SOD), and malondialdehyde (MDA)beside serum level of luteinizing hormone (LH), follicle-stimulating hormone (FSH), and testosterone weremeasured. Data were analyzed, using the one-way analysis of variance (ANOVA) and SPSS software.

MDMA (both 7 and 14 days) caused significant changes in sperm quality (P < 0.001),spermatogenesis indices (P < 0.001), testicular histopathology, and level of LH, FSH, testosterone beside theantioxidant enzyme activities (SOD, CAT, and MDA) (P < 0.001). Supplementation of FA in association withMDMA partially reversed these parameters and made them close to the control group.

The results suggested that FA could reduce the adverse effect of MDMA on reproductive ability inadult male rats.

Methamphetamine (METH) is a widely addictive and abused psychostimulant drug that affects organs of body. In this study, the effects of METH administration for 7, 14, and 28 days on the histological and functional changes of the liver and pancreas of adult male rats were investigated.

In this experimental study, 58 adult male Wistar rats were randomly divided into seven groups including control (received no treatment), vehicle (received saline for 7, 14, and 28 days), and METH (received METH with a dose of 5 ml/kg, IP for 7, 14 or 28 days). Sampling from the liver and pancreas tissues was done after the above-mentioned times for each group, then, tissue samples were stained by H&E technique and evaluated for structural changes, as well as the evaluation of biochemical factors including SGPT, SGOT, and amylase enzymes. Data were analyzed by one-way ANOVA, using SPSS software version 20. Statistical significant level was considered at p <0.05.

In this study, METH caused a significant structural change in the liver and pancreas in the METH-treated groups compared with the control group. Functional changes depended on the length of treatment, with the 7-day treatment group having less damage than the 14- and 28-day periods.

According to the results of the present study, methamphetamine administration for 7, 14, and 28 days had adverse effects on the rats liver and pancreas structure and their enzymes (SGPT, SGOT, and amylase). Therefore, underlying mechanism need further investigation.

Opium, as the most widely known opioid in the world, has significant effects on reproductive organs, which can affect fertility and influence the next generation. This study was performed to investigate the effects of opium administration on histological changes and spermatogenesis indexes in the testis of adult male rats.
A total of 50 adult male Wistar rats were used. Animals were divided into 5 groups (n=10). Control (intact), Vehicle (received saline for 7 and 14 days) and Opium (received 2 mg/kg opium i.p. For 7 and 14 days) groups. Sample of testes were stained by H&E, then the number of spermatogonia, spermatocytes and Leydig cells were counted and spermatogenesis indexes which included tubular differentiation index (TDI), spermatogenesis index (SI), repopulation index (RI) and means of seminiferous tubules diameter (MSTD) were determined.
In opium groups, the number of seminiferous tubules cells and spermatogenesis decreased compared with the control group (P<0.001). Moreover, the results showed that TDI, SI, RI and STD parameters significantly decreased in 7th and 14th days, compared with the control group (P<0.001).
The data showed the adverse effects of opium administration (for 7 and 14 days) on spermatogenesis and its indexes in rat testis tissue. The underlying mechanisms need further investigation.

Activation of IKK/NF-kB signaling pathway plays a critical role in inflammation-driven tumor progression. Several natural compounds able to inhibit the IKK/NF-kB activation pathway have been shown to either prevent cancer or inhibit cell growth. Extensive studies have been carried out on the Nigella sativa (N. sativa) by many researchers, and its pharmacological activities including anticancer, analgesic, and anti-inflammatory functions have been explored. This study investigated the effect of N. sativa extract on the mRNA level of NFk (p50, RelB) and IKK (IKKA, IKKB) to determine one of the anti-inflammatory mechanisms of N. sativa in breast cancer cells.
In this experimental study, MCF7 cell line was treated with different concentrations of hydroalcoholic extracts of N. sativa (0, 200, 400,600,800 μg/mL) for 24, 48 and 72 h. Effects of the extract on cell viability and NFk (p50, RelB ) and IKK (IKKA, IKKB) gene expression were analyzed by MTT assay and real time PCR, respectively.
mRNA expression levels of NFk (p50, RelB) and IKK (IKKA, IKKB) in the treatment group were lower than the untreated (control) group. Fold difference (p50, RelB) of gene expressions in treatment groups were statistically significant (P =0.001 and P =0.003) and the fold difference of IKK (IKKA, IKKB) in the treatment groups was lower than that of the untreated groups (P=0.01 and P=0.001).
One possible anti-inflammatory mechanism of N. sativa is associated with the reduction in mRNA levels of NFk (p50, RelB) and IKK (IKKA, IKKB) in breast cancer.

Previous studies have reported the antifertility activities of sulfonamides. This study was designed to evaluate the effects of co-trimoxazole and its co-administration with folic acid on ovarian tissue in female rats.
A total of 54 rats were randomly divided into 9 groups (n=6). Group I served as the control and group II (vehicle) received saline. Other groups, III to IX, received co-trimoxazole (30, 60, and 120 mg/kg; i.p.), folic acid (1 mg/kg; i.p.) or their combination for 14 days, respectively. The oocytes were obtained from each group at the end of the 14th days and scored for maturational status as germinal vesicle (GV), metaphase I (MI), or metaphase II (MII). The number of primordial follicle (PrF), primary follicle (PF), and secondary follicle in formalin-fixed ovaries were counted under light microscopy. The data were analyzed by one-way ANOVA followed by post-hoc Dunnet test using SPSS statistical software (version 17.0). Results were considered statistically significant at P Co-trimoxazole (60 and 120 mg/kg) treatment for 14 days caused a significant decrease in the number of GV (P=0.02, P The data showed the adverse effects of co-trimoxazole on the ovarian maturational status and tissue structure which was reversed partially by folic acid co-administration in rats.

Male infertility has been reported following long-term sulfasalazine, however, the precise effects of co-trimoxazole on sperm quality is controversial.

In this study, we evaluated the effects of co-trimoxazole and its co-administration with folic acid on sperm quality and histological changes of testes in male rats.

In this experimental study, 136 male Wistar rats were divided into 9 groups: I (control), II (vehicle) received saline, III: received folic acid (1 mg/kg /daily i.p., and IV- IX received co-trimoxazole (30, 60, and 120 mg/kg/daily; i.p.)纉 acid (1 mg/kg/daily; i.p.) for 14 or 28 days. Sperm samples were obtained from each group at the end of 14th and 28th days. Sperm numbers, motility, and viability were evaluated on a hemocytometer. Hematoxylin and Eosin stained testes were done for evaluation ofthe number of Leydig cells, vascularity, spermatids, spermatocytes, and means of seminiferous tubules diameter under light microscopy.

Co-trimoxazole treatment for either 14 or 28 days caused a significant decrease in the percentage of sperm number, motility, and viability (p

The data showed the adverse effects of co-trimoxazole on sperm quality and testes morphology which was protected partially by folic acid co-administration in rats. The underlying mechanism (s) needs further investigations.

Methamphetamine (mAMP) as a recreational drug has devastating effects on the central nervous system (CNS). Several studies have shown that mAMP has inhibitory effects on oogenesis and spermatogenesis, and causes impaired fertility. This study designed to investigate the effect of mAM Padministration on histological changes and spermatogenesis indices in the testis of adult male rats.
In this experimental study, 50 male Wistar rats were randomly divided into control (received no treatment, n = 10), vehicle (received saline for 7 and 14 days, n = 20), and experimental group [received mAMP, 5 ml/kg, intraperitoneal (IP) for 7 and 14 days, n = 20]. Testicular tissue samples were stained by hematoxylin and eosin (H&E) technique. For histological study, we counted the number of spermatogonia, spermatocytes and Leydig cells. Spermatogenesis indices which include: tubular differentiation index (TDI), spermiogenesis index (SI), repopulation index (RI) and the mean seminiferous tubules diameter (MSTD) were studied. Data were analyzed by one-way ANOVA, using SPSS software. P Findings: This study showed that mAMP caused a significant decrease in number of seminiferous tubules cells and spermatogenesis in treated group compared with the control group. Moreover, results showed a significant decrease in spermatogenesis indices including TDI, SI, RI, and MSTD in 14th day, compared to control group (P The data showed the adverse effects of mAMP administration (for 7 and 14 days) on testes structure and spermatogenesis indices in rat testis tissue. The underlying mechanism(s) needs further investigation.

Melissa officinalis (MO) has potent antioxidant activity. Recent research has demonstrated the anti-ulcer properties of some medicinal plants through their antioxidant properties.
The aim of this study was to evaluate the effects of methanolic extracts of MO on experimental gastric ulcers in rats.
Male Wistar rats (200 - 250 g) were starved for 24 hours prior to the induction of gastric ulceration by either indomethacin (48 mg/kg/oral) or water immersion restraint (WIR) stress. Experimental rats received either ranitidine (25 mg/kg) or MO extract (150, 300 and 450mg/kg) orally 2 hours prior to WIR stress or indomethacin treatment, for the evaluation of their gastroprotective effects. The control group received the same volume of saline. Gastric lesions were scored according to the surface of lesions on the ulcer index. Superoxide dismutase (SOD) and glutathione peroxidase (GPX) were determined as measures of antioxidant defense, and malondialdehyde (MDA) was determined to measure tissue oxidation.
MO extract (150 and 300 mg/kg) significantly decreased the ulcer index in both the indomethacin (1.3 ± 0.09 and 1.5 ± 0.19, respectively) and WIR stress groups (1.5 ± 0.17 and 1.5 ± 0.22, respectively), as compared to the control rats (2.5 ± 0.28) (P 0.05). Also, MO extract (150 and 300 mg/kg) significantly reduced MDA serum levels (0.69 ± 0.6 µmol/L and 0.85 ± 0.24 µmol/L, respectively, vs. 4.5 ± 1.9 µmol/L in the saline group) and significantly increased antioxidants’ SOD activities (296.3 ± 146.4 U/mL and 561.4 ± 120 U/mL, respectively, vs. 190.2 ± 63.8U/mL in the control group) and GPX levels (8273 ± 3049 U/mL and 14574 ± 5012 U/mL, respectively), compared to the control (3236 ± 1699 U/mL).
Our results showed that MO extract may have a gastroprotective effect against experimental gastric ulcers in rats. The exact mechanism has not yet been determined, but it may be due to enhancing enzymatic antioxidant defenses and inhibiting lipid peroxidation.

Different techniques have been proposed for the treatment of gingival recession. The majority of current procedures use autogenous soft‑tissue grafts, which are associated with morbidity at the donor sites. Acellular dermal matrix (ADM) Alloderm is an alternative donor material presented to reduce related morbidity and provide more volume of the donor tissue. This study aimed to evaluate the effectiveness of an ADM allograft for root coverage and to compare it with a connective tissue graft (CTG), when used with a double papillary flap. Sixteen patients with bilateral class I or II gingival recessions were selected. A total of 32 recessions were treated and randomly assigned into the test and contralateral recessions into the control group. In the control group, the exposed root surfaces were treated by the placement of a CTG in combination with a double papillary flap; and in the test group, an ADM allograft was used as a substitute for palatal donor tissue. Probing depth, clinical attachment level, width of keratinized tissue (KT), recession height and width were measured before, and after 2 weeks and 6 months of surgery. There were no statistically significant differences between the test and control groups in terms of recession reduction, clinical attachment gain, and reduction in probing depth. The control group had a statistically significant increased area of KT after 6 months compared to the test group. ADM allograft can be considered as a substitute for palatal donor tissue in root coverage procedure.