Retained integrity of protein encapsulated in spray-dried chitosan microparticles

Chitosan microparticles for delivery of proteins were prepared by spray-drying technique. The effects of formulation (molecular weight and concentration of chitosan) and process variables (inlet drying air temperature and spray rate) on size and morphology of microparticles were characterized. Size of microparticles was mainly controlled by formulation variables, while particle morphology was influenced by both formulation and process variables investigated in this study. Bovine serum albumin (BSA), as a model protein, was loaded into microparticles at different levels. BSA-loaded chitosan microparticles were characterized in terms of physicochemical properties and integrity of encapsulated protein, which was studied by sodium dodecyl sulphate-polyacrylamide gel electrophoresis and circular dichroism. Size of microparticles ranged between 3.760-8.681 microm, of which BSA-loaded microparticles were larger in size than their corresponding blank microparticles. All microparticles showed dented or distorted surface, especially when BSA was incorporated, with positive surface charge exposed. Burst release of protein was observed. The effect was more pronounced as BSA loading level was increased. Integrity of entrapped protein could be retained when BSA was incorporated at high loading level. In conclusion, chitosan microparticles for delivery of protein could be efficiently prepared by spray-drying technique. The encapsulated protein was capable of retaining its integrity after the preparation process.     

The 100% condom use programme in Asia

One of the main reasons for the rapid spread of HIV in Asian countries is the massive transmission among sex workers and clients. Therefore, effective interventions to prevent HIV transmission through sex work are necessary. Many efforts have been made to promote condom use in sex work. The most significant approach is the 100% Condom Use Programme. Since its conception in 1989, this programme has been implemented in Thailand, Cambodia, Philippines, Viet Nam, China, Myanmar, Mongolia and Laos PDR, with variations in programme components between countries. The main principle is to promote the practice of "No condom - No sex" in all types of sex work, through collaboration between local authorities, sex business owners and sex workers. Variations include formation of sex workers' self-help groups, peer education and issuance of membership cards by local authorities. Sex workers are empowered when they are able to refuse sex without a condom. In Thailand, the programme has increased the use of condoms in sex work from 14% in early 1989 to over 90% since 1992. The 100% Condom Use Programmes in Thailand and Cambodia, which are being implemented on a nationwide basis, are the main reason for the decline in the HIV epidemic. Scaling-up of activities is taking place in all other six countries.     

Reliability and validity of an adapted Thai version of the Scoliosis Research Society-22 questionnaire

Purpose  

The Scoliosis Research Society-22 (SRS-22) questionnaire is a widely accepted questionnaire used to assess the health-related quality of life for scoliosis patients in the United States. However, its adaptation in other languages is necessary for its multinational use. A cross-sectional study was performed to evaluate the validity and reliability of an adapted Thai version of the SRS-22 questionnaire.     

Buddhist group therapy for diabetes patients with depressive symptoms

The objective of this study was to assess the effect of Buddhist group therapy on patients with type 2 diabetes who had depressive symptoms. A quasi-experimental design study using a control group with matching technique was conducted. After informed consent was obtained, the "Nine questions for assessing depressive disorder symptom" (Isan language) was used to determine the patient's condition. A total of 62 patients with type 2 diabetes who had depressive symptoms were assigned to either the experimental group (n = 32) or the control group (n = 32). Patients in the experimental group were divided further into four groups (8 patients per group) and attended the Buddhist group therapy. The intervention consisted of a weekly Buddhist group gathering lasting 2 hours for 6 weeks plus home meditation practices. Patients in the control group received treatment as usual. Both groups received standard physician treatment, including medication. Physicians did not know who was in either the control or experimental groups. Results show that 6 months after the intervention, 65.6% and 100% of patients in the control group and experimental group, respectively, returned to normal level. The intention-to-treat analysis, which included two participants in the experimental group lost follow-up, yielded a small reduction in the number of patients who returned to normal level (93.8%). With intention-to-treat analysis, the relative risk on depressive symptoms between the experimental and control groups was 6.5 (95% confidence interval, 1.4-30.6). Qualitative data from the experimental group supported that there were therapeutic group factors involved. However, patients realized the truth of being oneself and also accepted their current living condition. In conclusion, this program is effective in reducing depressive symptoms.     

Rapid imaging of free radicals in vivo using hybrid FISP field-cycled PEDRI

A new pulse sequence for rapid imaging of free radicals is presented which combines snapshot imaging methods and conventional field-cycled proton electron double resonance imaging (FC-PEDRI). The new sequence allows the number of EPR irradiation periods to be optimized to obtain an acceptable SNR and spatial resolution of free radical distribution in the final image while reducing the RF power deposition and increasing the temporal resolution. Centric reordered phase encoding has been employed to counter the problem of rapid decay of the Overhauser-enhanced signal. A phase-correction scheme has also been used to correct problems arising from instability of the magnetic field following field-cycling. In vivo experiments were carried out using triaryl methyl free radical contrast agent, injected at a dose of 0.214 mmol kg(-1) body weight in anaesthetized adult male Sprague-Dawley rats. Transaxial images through the abdomen were collected using 1, 2, 4 and 8 EPR irradiation periods. Using 4 EPR irradiation periods it was possible to generate free radical distributions of acceptable SNR and resolution. The EPR power deposition is reduced by a factor of 16 and the acquisition time is reduced by a factor of 4 compared to an acquisition using the conventional FC-PEDRI pulse sequence.     

Henoch-Schonlein Purpura Presenting as Hemorrhagic Vesicles and Bullae: Case Report and Literature Review

Abstract: Henoch-Schonlein purpura is a syndrome characterized by nonthrombocytopenic purpura accompanied by arthralgia, gastrointestinal symptoms, or renal involvement. We report a 5.5-year-old boy with high fever and hemorrhagic vesicles and bullae varying in size from 2 to 50 mm in diameter, on both pinnas, the hard palate, gums, dorsa of the hands, buttocks, and both legs, and review the pertinent literature.     

Pitfall of Electron Beam Computed Tomography Angiography in Diagnosis of Subclavian Steal Syndrome

A patient presented with vertebrobasilar insufficiency during exertion. Vertebral duplex and transcranial Doppler ultrasonography showed reversal of flow in both intracranial and extracranial vertebral and basilar arteries, suggesting bilateral subclavian and vertebrobasilar steal. Electron beam computed tomography angiography (CTA) showed no evidence of subclavian artery stenosis including normal vertebral artery origin on both sides. However, digital subtraction angiography revealed complete occlusion of both subclavian arteries with retrograde flow from both vertebral and basilar arteries to reconstitute both subclavian arteries. This false-negative finding on CTA in detection of subclavian steal syndrome (SSS) is due to inappropriate contrast administration technique and postprocessing method, inability to differentiate flow direction, and lack of hemodynamic time sequences. This study demonstrates a pitfall of CTA in diagnosis of SSS compared to more reliable hemodynamic information obtained by duplex and transcranial Doppler ultrasonography, and digital subtraction angiography.     

A randomized-controlled trial to compare topical cyclosporin with triamcinolone acetonide for the treatment of oral lichen planus

BACKGROUND: Various treatments have been employed to treat symptomatic oral lichen planus (OLP), but a complete cure is very difficult to achieve because of its recalcitrant nature. Topical cyclosporin therapy of OLP has shown conflicting results in many reports. The purpose of this study was to compare the effectiveness of cyclosporin solution with triamcinolone acetonide 0.1% in orabase in the treatment of Thai patients with OLP. METHODS: Thirteen Thai patients with symptomatic OLP and proven by biopsy were randomly assigned treatment with cyclosporin (six) or triamcinolone acetonide 0.1% (seven). The patients were instructed to apply cyclosporin or triamcinolone acetonide 0.1% three times daily at the marker lesions and affected areas. The assessments were at weeks 0, 2, 4, 8 by clinical scoring and grid measurement of the target lesions. Cyclosporin levels were assessed at weeks 2 and 8 of treatment. Pain and burning sensation were evaluated by linear visual analogue scale (0-10). RESULTS: OLP patients in the triamcinolone acetonide group showed equal cases of clinical complete and partial remission (50%). Whereas, in the cyclosporin group, there was partial remission in only two cases (33.5%) and no response in four cases (66.7%). However, our study showed that there were no statistical differences in pain, burning sensation and clinical response in OLP patients between the two groups (P > 0.01). Moreover, five of six cases in the cyclosporin group developed side-effects such as transient burning sensation, itching, swelling lips, petechial haemorrhages and others. CONCLUSION: Our results indicated that topical cyclosporin did not provide any beneficial effect and was not more effective than triamcinolone acetonide 0.1% in the treatment of Thai patients with symptomatic OLP.