Clinical application of artificial oxygen carriers as a substitute for blood transfusion has long been expected to solve some of the problems associated with blood transfusion. Use for oxygen delivery treatment for ischemic disease by oxygen delivery has also been examined. These prospective applications of artificial oxygen carriers are, however, still in development. We have developed liposome-encapsulated hemoglobin (LEH), developmental code TRM-645, using technologies for encapsulation of concentrated hemoglobin (Hb) with high encapsulation efficiency as well as surface modification to achieve stability in circulating blood and a long shelf life. We have confirmed the basic efficacy and safety of TRM-645 as a red blood cell substitute in studies on the efficacy of oxygen delivery in vivo, and the safety of TRM-645 has been studied in some animal species. We are now examining various issues related to clinical studies, including further preclinical studies, management of manufacturing and the quality assurance for the Hb solution and liposome preparations manufactured by the GMP facility.
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http://dx.doi.org/10.1111/j.1525-1594.2008.00699.x | DOI Listing |
Nanoscale
January 2025
Analytical & Testing Center; West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu 610064, China.
Continuous microenvironment modulation is an ongoing challenge in wound dressing, which includes excessive exudate absorption, oxygen delivery, bacterial inhibition and angiogenesis. Herein, we developed an construction strategy to fabricate a self-retaining double-layered wound dressing, where the top layer precursor was composed of Ca-containing polyvinyl butyral (PVB) solution dispersed with hydroxypropyl methylcellulose (HPMC) particles, and the bottom one consisted of sodium alginate (Alg) solution blended with Ag-doped mesoporous bioactive glass powders (Ag-MBG). When in use, both precursors were simultaneously squeezed out from the twin nozzles connected to the individual chambers of a twin-chambered syringe, whereby Ca in the top layer rapidly migrated downwards to crosslink Alg in the bottom layer, leading to the formation of an Alg/Ag-MBG (AA) functional hydrogel for filling an irregular wound.
View Article and Find Full Text PDFCancer Med
February 2025
Department of General Surgery, The First People's Hospital of Baiyin (Third Affiliated Hospital of Gansu University of Traditional Chinese Medicine), Baiyin, China.
Background: Photodynamic therapy (PDT) is a noninvasive cancer treatment that works by using light to stimulate the production of excessive cytotoxic reactive oxygen species (ROS), which effectively eliminates tumor cells. However, the therapeutic effects of PDT are often limited by tumor hypoxia, which prevents effective tumor cell elimination. The oxygen (O) consumption during PDT can further exacerbate hypoxia, leading to post-treatment adverse events.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
School of Life Sciences, Henan University, Kaifeng, Henan 475001, China.
Melanoma, a highly aggressive skin cancer, poses significant challenges due to its rapid metastases and high mortality rates. While metformin (Met), a first-line medication for type 2 diabetes, has shown promise in inhibiting tumor growth and metastases, its clinical efficacy in cancer therapy is limited by low bioavailability, short half-life, and gastrointestinal adverse reactions associated with oral administration. In this study, we developed a hollow mesoporous polydopamine nanocomposite (HMPDA-PEG@Met@AB) coloaded with Met and ammonia borane (AB), designed to enable a combined gas-assisted, photothermal, and chemotherapeutic approach for melanoma treatment.
View Article and Find Full Text PDFJ Tissue Eng
January 2025
Department of Chemical Engineering, McGill University, Montreal, QC, Canada.
Islet transplantation and more recently stem cell-derived islets were shown to successfully re-establish glycemic control in people with type 1 diabetes under immunosuppression. These results were achieved through intraportal infusion which leads to early graft losses and limits the capacity to contain and retrieve implanted cells in case of adverse events. Extra-hepatic sites and encapsulation devices have been developed to address these challenges and potentially create an immunoprotective or immune-privileged environment.
View Article and Find Full Text PDFJ Biosci Bioeng
January 2025
Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China; Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, Shantou University, Shantou 515063, China; Shantou Key Laboratory of Marine Microbial Resources and Interactions with Environment, Shantou University, Shantou 515063, China. Electronic address:
Oxidative stress, caused by excessive production of reactive oxygen species (ROS), plays a crucial role in the occurrence and development of various diseases. Monascin can scavenge ROS and alleviate oxidative stress but with a low fermentation rate and bioavailability. Here, we optimized the fermentation process to increase the production of monascin (508.
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