Disease activity in MS patients is associated with increases in CD25 expression, but it is not known if this reflects pathogenic T cell activation or the activation of regulatory T cells which could serve to down-regulate pathogenic immune responses (Khoury et al., 2000).
moisturenoun [ U ] uk â /ËmÉÉªs.tÊÉr/ us â /ËmÉÉªs.tÊÉ/. âº a liquid such as water in the form of very small drops, either in the air, in a substance, or on a surface: These plants need a rich soil that retains moisture. Thesaurus: synonyms and related words. Precipitation: clouds, dew, fog & steam. altocumulus.
Solvent: the substance that other substances are dissolved in. A solvent does not necessarily have to be a liquid. Solvents can be gases, liquids, or solids. Water is one of the most important solvents on Earth because it is so common in living systems.