Université du Québec à Montréal, Canada.
Pompilia Ispas-Szabo is Adjunct Professor at Université du Québec à Montreal (UQAM, Canada) and a Research & Development scientist in pharmaceutical industry. She completed her M.Sc in Physical Chemistry at Bucharest University and the Ph.D. at UQAM. Co-inventor of new excipients proposed as matrices for controlled drug delivery or new products, she worked in various Canadian pharmaceutical companies (Smartrix Technologies, IntelGenx Corp., Aptalis Pharma, etc.), being involved in the development of innovative products or technological platforms. Co-author of 10 patents/applications, more than 30 papers in reputed journals, one book, two book-chapters, member of Controlled Release Society and AAPS, and reviewer for several international journals, she is recognized for her contribution to academic and industrial innovation.
Macromolecular self-assembly represents an interesting way to produce materials for various therapeutic applications (targeted drug delivery, bioactive encapsulation). Considerable interest relates to the design of polymer- or peptide-based self-assembled biomaterials due to the possibility to generate different specific properties by new arrangements at molecular level. Differently from existing approaches which explore mainly the drug-excipient association in order to improve solubility, we are proposing a new alternative – the drug-drug self-assembling, using two different active molecules. Mesalamine (5-aminosalicylic acid, MES) is an efficacious active ingredient used for the long-term therapy of inflammatory bowel disease. However, its oral administration is frequently associated with systemic side effects caused by drug absorption in the upper gastrointestinal tract. Sucralfate (SUC) is a non-systemic site protector prescribed in the treatment of inflammation and gastric ulceration. The anti-inflammatory action of MES in association with bioadhesiveness and mucosal healing properties of SUC were considered promising for the development of a new compound containing both molecules, aimed as an improved treatment of ulcerative colitis. The present case investigated the capacity of the two active agents to interact and generate a new and stable entity via self-assembling. Spray-drying was used to co-process the two active principles from an aqueous mixture. Preliminary in vitro studies with oral solid dosage forms based on the obtained MES-SUC complexes have shown a controlled MES release, opening the perspective of a new colon-targeted delivery system and a novel class of compounds with therapeutic application in inflammatory bowel diseases.