Background: Hepatotoxicity due to drugs is the most common cause of deaths. Nephrotoxicity of the drugs is usually associated with the drugs accumulation in renal tissue. Paromomycin sulfate (PMS) is an anti-leishmania drug. Although the topical approach for the treatment of leishmania is attractive, its use might cause nephrotoxicity and hepatotoxicity. Objectives: This study aimed to evaluate probable nephrotoxicity and hepatotoxicity of topically administered PMS liposomes. Materials and Methods: Nine groups of male rats were used in this study; each group consisted of 6 rats that were evaluated in 3 time periods of 10, 20, and 30 days. Three groups were placed in each time period; a control group did not receive any medicine; a negative control group received liposome without paromomycin sulfate; and a positive control group received nanoliposomal formulations containing paromomycin sulfate. Pharmaceutical formulation (topical form) was used 2 times a day in a 12-hour interval. At the end of the period, hepatic enzymes (ALT, AST, and ALK), BUN levels, and serum creatinine were measured. Results:The results showed that no significant change was occurred in the amount of the above factors compared with the control group with the negative control group in 3 time periods (P > 0.05). The histopathological results of the liver and kidney showed that there was no difference in the between the negative control and positive control groups and the control group in the 10-and 20-day periods, and they had a normal structure. However, after the 30-day time period a reversible cellular inflammation in the liver and mild kidney necrosis was seen in the positive control group versus the control and negative control groups. Conclusions: In general, it can be said that the application of nanoliposomal paromomycin sulfate formulations for topical treatment of the cutaneous leishmaniasis does not create serious side effects in the short term, but its long-term use leads to mild renal and liver side effects that requires more attention.

High Performance Fiber Reinforced Cementitious Composite (HPFRCC) materials exhibit strain hardening behavior under tensile loading. This strain hardening response occurs after first cracking of the material. In this paper, experimental and parametric studies are performed to assess the influence of the compressive strength, loading type and tension reinforcement ratio (ρ) on the ultimate deformation characteristics of reinforced HPFRCC beams. The analytical and numerical results for simply supported beams with different amounts of tension reinforcement ratio under three different loading conditions are presented and compared with each other and also with the experimental data, where available. The plastic hinge rotation capacity is increased as the loading condition is changed from the concentrated load at the middle to the uniform, and it is a maximum for the case of the two-point load. The effect of the loading type on the plastic rotation capacity of the reinforced beams with high amount of ρ is not as significant as that for the lightly reinforced beams. Based on the analytical results obtained using the nonlinear finite element method, new simple equations as function of the tension reinforcement ratio and the loading type are proposed. The analytical results indicate that the proposed equations can be used with sufficient accuracy for analysis of ultimate capacity and the associated deformations of RHPFRCC beams.

Background: Wound healing is a complicated and integrated process. Researches have indicated the wound healing effects of calcium channel blockers in animal models in recent years. Objectives: The aim of this study was to evaluate the wound-healing activity of amlodipine as a calcium channel blocker and combination of amlodipine with phenytoin on excisional cutaneous wound models in rabbit. Materials and Methods: Animals were divided into 5 groups (n = 5). The control group was treated topically with eucerin. The untreated control group received no healing agent. The reference standard group was treated with phenytoin1%. A treatment group was treated with amlodipine 1%. The last group was treated with combination of amlodipine1% and phenytoin 1%. Results: Results indicated significant difference between days needed for complete healing in both of the treatment groups. Wound closure was completed on 13th day and 9th day in amlodipine and combination groups respectively. Conclusions: In conclusion, calcium channel blockers can be used to enhance wound healing, especially if this treatment becomes with phenytoin. Further studies are needed to find out the mechanism of this healing effect.

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Introduction: Generally affecting women, melasma is the acquired disorder of hyperpigmentation, and researches are still ongoing to find an effective, fast, and low-side-effect drug treating this disease. The present study is aimed at comparing the efficacy of topical metformin and placebo in the treatment of melasma. Methods: Sixty patients with melasma were treated in placebo and topical metformin recipient groups in a double-blind clinical trial. In addition to the demographic and laboratory findings of patients before and after the intervention, the MASI Score of patients in weeks 0, 4, 8, and 12 of the study and then one month after the study were analyzed using SPSS version 20 software. Results: The mean age of the studied patients was 35.25 ± 7.11 years. No significant difference was observed between the phenotypes (P= .49) and the type of melasma (P= .63) in the two groups. The mean MASI score of patients at the time of being included in the study in the placebo group was 10.47 ± 3.08; and in the metformin group, it was 11.93 ± 4.64 (P = .16). Compared to the beginning of the study, the MASI scores were significantly decreased in both groups of placebo (P = .00) and metformin (P = .00) one month after the end of the study; nevertheless, no statistically significant difference was observed between the MASI Scores of two groups in any of the study periods (P > .05). Conclusion: The results of the present study showed that metformin cream significantly declines the patients’ MASI score and does not have any effect on patients’ laboratory markers. Of course, no significant difference was observed between the MASI scores of the patients receiving metformin and the placebo group; however, the MASI score decrease trend continued until the 12th week; while in the placebo group, no significant decrease was seen after eight weeks.