In the 21st century, the rapid advance of space programs raises ethical concerns about the consequences of exploring and exploiting space resources. The concept note of the World Commission on the Ethics of Scientific Knowledge and Technology (COMEST) on the ethical considerations on space exploration and exploitation adopted in August 2024 states that “the international community is now in need of developing ethical principles for space exploration and exploitation that complement currently existing outer space treaties”. Key areas for future ethical regulation of space projects include prospects for commercial developments, space tourism programs, mining, and deep space exploration to study exoplanet atmospheres and search for terrestrial planets. Space exploration provides important knowledge that improves the quality of life and has a technological and innovative impact on society. The “inspiring factor” of space research is crucial for motivating future generations of scientists to develop science. However, it must be borne in mind that human activities pose significant risks to both near-Earth space and Earth’s ecosystems. The scale of space ethics proposed by COMEST will help systematize information about ethical uncertainty factors, risks and consequences of risks associated with initiatives in space exploration and exploitation.
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4-(5-methyl-1,3,4-oxadiazole-2-yl)-benzenesulfonamide (ODASA), which is a novel selective type II carbonic anhydrase inhibitor for treating open-angle glaucoma, is undergoing preclinical testing. Pharmacokinetics of the substance have only been studied in rats. Prior to clinical studies, it is necessary to assess the systemic exposure of ODASA in non-rodents. ODASA was administered to Soviet Chinchilla rabbits at a dose of 0.28 mg/kg. About 40 µl of ocular suspension of ODASA was instilled into each eye of animals from the first group, whereas the second group received intraperitoneal injections of the investigational drug. Each group consisted of 6 male rabbits. Samples were obtained prior to administration of ODASA and during 288 hours following the administration at 16 time points. A 10% ascorbic acid solution was added to plasma before freezing. The samples were analyzed using HPLC-MS/MS. Following eyedrop instillation, relative bioavailability for ODASA was 31% as compared to IP administration. Thus, as ODASA was well absorbed into the systemic circulation of rabbits following topical eyedrop instillation, testing its pharmacokinetics in healthy volunteers will be obligatory if the preparation proceeds to phase 1 of clinical studies.
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