Chitinases are necessary for fungal cell wall remodeling and cell replication. Methylxanthines have been shown to competitively inhibit family 18 chitinases in vitro. We sought to determine the effects of methylxanthines on fungal chitinases. Fungi demonstrated variable chitinase activity and incubation with methylxanthines (0.5–10 mM) resulted in a dose-dependent decrease in this activity. All fungi tested, except for Candida spp., demonstrated growth inhibition in the presence of methylxanthines at a concentration of 10 mM. India ink staining demonstrated impaired budding and decreased cell size for methylxanthine-treated Cryptococcus neoformans. C. neoformans and Aspergillus fumigatus treated with pentoxifylline also exhibited abnormal cell morphology. In addition, pentoxifylline-treated C. neoformans exhibited increased susceptibility to calcofluor and a leaky melanin phenotype consistent with defective cell wall function. Our data suggest that a variety of fungi express chitinases and that methylxanthines have antifungal properties related to their inhibition of fungal chitinases. Our results highlight the potential utility of targeting chitinases in the development of novel antifungal therapies.
Aims: This study aimed to capture patient satisfaction with a Telehealth model of care in a tertiary hospital gastroenterology outpatient setting. An in-depth patient questionnaire addressed patients' experience with telephone based consultations, as well as capturing demographic data to predict patients who may benefit from a Telehealth model of care. Methods: Patients aged ≥ 18 years who had a telephone appointment from 1st March 2020 to 1st September 2020 at the St George Hospital and Sutherland Hospital Gastroenterology Clinics in Sydney, Australia, were invited to complete an anonymous online survey detailing their experience. Clinics included general gastroenterology, inflammatory bowel disease, hepatology and swallow disorders. Chi squared analysis was used to investigate if demographic data (age, gender, educational status, English-spoken at home, and presence of IBD or cirrhosis) impacted on a patients rating of care they received. Results: 1894 patients were invited to complete with survey, with 302 responses. 294 respondents (88.4%) rated the care they received as "very good" or "good". 254 (84.1%) stated the main reason for attending the clinic was dealt with to their satisfaction. There was no statistical relationship between age, gender, educational status and the rating of care received. 49.7% preferred their telephone appointment, and 63.6% would like the option of a telephone appointment in the future. Conclusion: Gastroenterology outpatients reported a very high satisfaction with Telehealth, demonstrating a potential for Telehealth to be incorporated into usual care.
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