Saeed Keshavarz

Baqiyatallah University of Medical Sciences, Teheran, Tehrān, Iran

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Publications (5)9.91 Total impact

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    ABSTRACT: Sulfur mustard (SM) is a blister-forming agent that has been used as a chemical weapon. Sulfur mustard can cause damage in various organs, especially the skin, respiratory system, and eyes. Generally, the multiple complications of mustard gas result from its alkalizing potency; it reacts with cellular components like DNA, RNA, proteins, and lipid membranes.TGF-β is a multi-functional cytokine with multiple biological effects ranging from cell differentiation and growth inhibition to extracellular matrix stimulation, immunosuppression, and immunomodulation. TGF-β has 3 isoforms (TGF-β 1, 2, 3) and its signaling is mediated by its receptors: R1, R2 and intracellular Smads molecules.TGF-β has been shown to have anti-inflammatory effects. TGF-βs and their receptors also have an important role in modulation of skin inflammation, proliferation of epidermal cells, and wound healing, and they have been implicated in different types of skin inflammatory disorders. Seventeen exposed SM individuals (48.47 ± 9.3 years), 17 chronic dermatitis patients (46.52 ± 14.6 years), and 5 normal controls (44.00 ± 14.6 years) were enrolled in this study.Evaluation of TGF-βs and their receptors expressions was performed by semiquantitative RT-PCR. Only TGF1 was analyzed immunohistochemically. Our results showed significant decreases in the expression percentages of TGF-β 1, 2 and R1, R2 in chemical victims in comparison with chronic dermatitis and normal subjects and significant decreases in the intensity of R1 and R2 expressions in chemical victims in comparison with chronic dermatitis and normal controls. (P value < 0.05) TGF-βs and their receptors appear to have a noticeable role in chronic inflammatory skin lesions caused by sulfur mustard.
    BMC Dermatology 01/2011; 11:2.
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    ABSTRACT: Sulfur mustard (SM) - a chemical agent - has both acute and chronic effects on skin. Xerosis, which is deemed to be due to the damage of hydrolipidic barrier of the skin, is the most common complaint of veterans exposed to the chemical. This study was designed to evaluate skin sebum and elasticity in veterans with a history of SM contact. Three hundred and ten subjects were enrolled in this study and were divided into four groups: SM-exposed patients with current skin lesions (n=87); SM-exposed patients without skin lesions (n=71); patients with dermatitis (n=78); and normal controls (n=74). The skin sebum and elasticity were measured in four areas (forehead, suprasternal, palm and back of the hands) using a Sebumeter and a Reviscometer. Skin sebum was higher in participants who presented with dermatitis and had history of contact with SM than others; the difference was only statistically significant on the forehead. There was no significant difference in the skin elasticity between the four groups. While SM may increase skin sebum in long term, there is no evidence that it has a substantial effect on skin elasticity.
    Skin Research and Technology 05/2010; 16(2):237-42. · 1.41 Impact Factor
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    ABSTRACT: Skin lesions are among the most common complications of contact with sulfur mustard. This study was aimed to measure skin water content and transepidermal water loss (TEWL) in patients with a history of sulfur mustard contact. Three hundred ten male participants were included in this study: 87 (28.1%) sulfur mustard-exposed patients with current skin lesions (group 1), 71 (22.9%) sulfur mustard-exposed patients without skin lesions (group 2), 78 (25.2%) patients with dermatitis (group 3) and 74 (23.8%) normal controls (group 4) The water content and TEWL of skin was measured at four different locations of the body: forehead, suprasternal, palm and dorsum of hand. Nonparametric statistical tests (Kruskal-Wallis) were used to compare the four groups, and P < 0.05 was considered statistically significant. The mean age of participants were 44.0 +/- 6.7, 41.9 +/- 5.9, 43.8 +/- 9.3 and 44.8 +/- 8.9 years in groups 1 to 4, respectively (P = 0.146). Xerosis, post-lesional hyperpigmentation and lichenification were significantly more common in either sulfur mustard-exposed participants or non-exposed participants with dermatitis (P < 0.05). Skin hydration was higher in subjects with sulfur mustard contact than in non-injured participants (P < 0.05) in the dorsum and palm of hands and forehead. TEWL was significantly higher in participants only in suprasternal area and dorsum of hand. Contact with sulfur mustard agent can alter biophysical properties of the skin--especially the function of stratum corneum as a barrier to water loss-several years after exposure.
    Journal of the European Academy of Dermatology and Venereology 05/2009; 23(8):940-4. · 2.69 Impact Factor
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    ABSTRACT: To compare the long-term effectiveness and safety of long-pulsed Nd:YAG and alexandrite lasers, individually and in combination, in long-term leg hair reduction. Randomized, single-center, within-participant, investigator-blinded, active-controlled clinical trial. Private skin laser center. Twenty individuals aged 16 to 50 years with skin phototypes III and IV. The medial and lateral sides of each participant's legs were randomly assigned to receive 1 of the following laser treatments: (1) long-pulsed 1064-nm Nd:YAG laser (12-mm spot size); (2) long-pulsed 755-nm alexandrite laser (12-mm spot size); (3) long-pulsed 755-nm alexandrite laser (18-mm spot size); and (4) a combination of long-pulsed 1064-nm Nd:YAG laser and long-pulsed 755-nm alexandrite laser (treatments 1 and 2). Identified areas were treated for a total of 4 sessions at 8-week intervals. Hair reduction from baseline based on hair counting with digital photography by 2 blinded assessors, 8 and 18 months after the last treatment session. Fifteen participants completed the trial. The mean (SD) hair reduction 18 months after the last treatment, as measured by the assessors from digital photographs, were 75.9% (19.0%) for the 12-mm spot size alexandrite laser, 84.3% (12.4%) for the 18-mm spot size alexandrite laser, 73.6% (11.4%) for the Nd:YAG laser, and 77.8% (15.9%) for the combination therapy (analysis of variance, P > .05). The incidence of adverse effects (hyperpigmentation) and pain severity were significantly greater in areas that received combination therapy (P = .001). After 18 months of follow-up, alexandrite and Nd:YAG lasers were efficacious for leg hair removal. Combination therapy did not have any additional benefit and caused more adverse effects.
    Archives of dermatology 10/2008; 144(10):1323-7. · 4.76 Impact Factor
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    ABSTRACT: A 4-week randomized, double-blind safety and efficacy study was conducted to compare the safety and efficacy of cetirizine, doxepine, and hydroxyzine 5 in the treatment of chronic pruritus due to sulfur mustard. Patients were treated in the Dermatology Clinic of Baqiyatallah Hospital. The study population consisted of 75 patients with chronic pruritus due to sulfur mustard exposure. Patients were given either cetirizine 10 mg, doxepine 10 mg, or hydroxyzine 25 mg/day, for 4 weeks. A calculated pruritic score for each patient was taken before and 1 month after treatment. Mean before-treatment pruritic scores were 38.2 +/- 4.8, 37.2 +/- 4.9, and 37.3 +/- 5.1 in the cetirizine, doxepine, and hydroxyzine groups, respectively. After treatment, the mean pruritic scores were 24.8 +/- 3.1, 17.8 +/- 2.5, and 16.7 +/- 2.3 in the cetirizine, doxepine, and hydroxyzine groups, respectively. In addition, 65%, 75%, and 80% of patients in the cetirizine, doxepine, and hydroxyzine groups were downgraded in the severity of pruritus (P 1/4 0.465). Sedation effects were reported in 6, 14, and 18 patients in the cetirizine, doxepine, and hydroxyzine groups, respectively. Hydroxyzine 25 mg/day has equal results compared to doxepine 10 mg once daily; but greater than cetirizine 10 mg once a day in controlling the symptoms of patients with chronic pruritus.
    Cutaneous and Ocular Toxicology 02/2007; 26(3):249-55. · 1.04 Impact Factor