Evaluation of wound-healing efficiency of a functional Chitosan/Aloe vera hydrogel on the improvement of re-epithelialization in full thickness wound model of rat.

OBJECTIVE: Chitosan-based hydrogels as wound dressings are expected to improve the efficiency of the wound-healing process. Fabrication of the composite structure of Aloe vera and biopolymeric hydrogels has been demonstrated to promote the wound-healing process through protection against a wide spectrum of microbes, and enhanced cell adhesion and differentiation. Therefore, the present study investigates to development of improved CHO/Aloe hydrogel for improving the wound-healing process in an animal model. MATERIALS AND METHODS: CHO hydrogel with Aloe was prepared, and its properties were evaluated in terms of viscosity, antibacterial activity, and ints In-vivo wound-healing efficiency in full-thickness wounds of rat models. Physical examination of wound-healing efficiency of CHO/Aleo hydrogel was evaluated by analyzing total wound closure, recovery percentage, and the epiderm thickness of wounds. Histological evaluation was performed using hematoxylin and eosin staining to evaluate the re-epithelialization, inflammatory response, granulation tissue formation, and fibrotic tissue formation. RESULTS: The results showed a significantly higher wound-healing rate of the CHO/Aleo group compared to other groups at 3,7,14 days (p < 0.05). After 14 days of treatment, the best healing effect was observed in the CHO/Aleo gel with the highest tissue tension compared with other groups (p < 0.05). Histological findings indicated a significant difference in inflammatory response between control and treatment groups after three days of treatment (p < 0.05). Epidermal thickness was also significantly thicker in the CHO/Aleo gel group than others (p < 0.05). CONCLUSION: The present study an improved the effective topical drug-delivery system by CHO/Aloe hydrogel with the potential to reduce inflammation over time, allowing the body to recover more quickly and better re-epithelialization for improving the wound-healing procedures.

Correlation of laryngeal squamous cell carcinoma and infections with either HHV-8 or HPV-16/18.

Each year more than 159,000 new cases of laryngeal cancer are diagnosed globally, and more than 9000 patients die due to this malignancy. Viral infections are a known risk factor for this malignancy. Thus, this study aimed to evaluate the role of HPV-16/18 and HHV-8 infection in patients with laryngeal cancer. In this case-control study, 60 formalin-fixed, paraffin-embedded samples of laryngeal cancer and 22 normal larynx tissue samples from the Pathology Department of Qaem Hospital, Mashhad, Iran were studied. After validating the diagnosis, the samples were evaluated for the detection of HPV-16/18 and HHV-8 DNA using PCR technique. The data were registered and analyzed using SPSS 18.0. The average age for patients and controls was 61.29±11.89 and 55.77±10.10, respectively. Fifty-four patients (90%) and 16 (72.7%) controls were male. PCR results detected no HPV-16/18 DNA in both groups. Although there were 2 positive HHV-8 samples in both laryngeal cancer and normal larynx samples, no significant relation was present (p=0.291). We found no significant relationship between infection with HHV-8 or HPV-16/18 and the existence of laryngeal cancer. However, more complementary studies are required to re-evaluate our results using more samples and better viral detection techniques.