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Carone M, Spalinger MR, Gaultney RA, Mezzenga R, Hlavačková K, Mookhoek A, Krebs P, Rogler G, Luciani P, Aleandri S. Temperature-triggered in situ forming lipid mesophase gel for local treatment of ulcerative colitis. Nat Commun 2023; 14:3489. [PMID: 37311749 DOI: 10.1038/s41467-023-39013-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 05/25/2023] [Indexed: 06/15/2023] Open
Abstract
Ulcerative colitis is a chronic inflammatory bowel disease that strongly affects patient quality of life. Side effects of current therapies necessitate new treatment strategies that maximise the drug concentration at the site of inflammation, while minimizing systemic exposure. Capitalizing on the biocompatible and biodegradable structure of lipid mesophases, we present a temperature-triggered in situ forming lipid gel for topical treatment of colitis. We show that the gel is versatile and can host and release drugs of different polarities, including tofacitinib and tacrolimus, in a sustained manner. Further, we demonstrate its adherence to the colonic wall for at least 6 h, thus preventing leakage and improving drug bioavailability. Importantly, we find that loading known colitis treatment drugs into the temperature-triggered gel improves animal health in two mouse models of acute colitis. Overall, our temperature-triggered gel may prove beneficial in ameliorating colitis and decreasing adverse effects associated with systemic application of immunosuppressive treatments.
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Affiliation(s)
- Marianna Carone
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
| | - Marianne R Spalinger
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Robert A Gaultney
- Institute of Tissue Medicine and Pathology, University of Bern, Bern, Switzerland
| | - Raffaele Mezzenga
- Laboratory of Food & Soft Materials, Institute of Food, Nutrition and Health, IFNH; Department for Health Sciences and Technology, D-HEST, ETH Zurich, Zurich, Switzerland
| | - Kristýna Hlavačková
- Institute of Tissue Medicine and Pathology, University of Bern, Bern, Switzerland
| | - Aart Mookhoek
- Institute of Tissue Medicine and Pathology, University of Bern, Bern, Switzerland
| | - Philippe Krebs
- Institute of Tissue Medicine and Pathology, University of Bern, Bern, Switzerland.
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
| | - Paola Luciani
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland.
| | - Simone Aleandri
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland.
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Pirbhai M, Albrecht C, Tirrell C. A multispectral-sensor-based colorimetric reader for biological assays. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:064103. [PMID: 34243509 DOI: 10.1063/5.0040602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 05/27/2021] [Indexed: 06/13/2023]
Abstract
Tests that depend on changes in color are commonly used in biosensing. Here, we report on a colorimetric reader for such applications. The device is simple to construct and operate, making it ideal for research laboratories with limited resources or skilled personnel. It consists of a commercial multispectral sensor interfaced with a Raspberry Pi and a touchscreen. Unlike camera-based readers, this instrument requires no calibration of wavelengths by the user or extensive image processing to obtain results. We demonstrate its potential for colorimetric biosensing by applying it to the birefringent enzyme-linked immunosorbent assay. It was able to prevent certain false positives that the assay is susceptible to and lowered its limit of detection for glucose by an order of magnitude.
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Affiliation(s)
- M Pirbhai
- Department of Physics, St. Lawrence University, 23 Romoda Dr., Canton, New York 13617, USA
| | - C Albrecht
- Department of Physics, University of Oregon, 1585 E 13th Ave., Eugene, Oregon 97403, USA
| | - C Tirrell
- Department of Physics, St. Lawrence University, 23 Romoda Dr., Canton, New York 13617, USA
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