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6 de may. de 2024 · RNA interference ( RNAi) is a biological process in which RNA molecules are involved in sequence-specific suppression of gene expression by double-stranded RNA, through translational or transcriptional repression. Historically, RNAi was known by other names, including co-suppression, post-transcriptional gene silencing (PTGS), and quelling.
Hace 2 días · DNA damage, due to environmental factors and normal metabolic processes inside the cell, occurs at a rate of 10,000 to 1,000,000 molecular lesions per cell per day. While this constitutes at most only 0.0003125% of the human genome's approximately 3.2 billion bases, unrepaired lesions in critical genes (such as tumor suppressor genes) can impede a cell's ability to carry out its function and ...
1 de may. de 2024 · microRNA. Pre-miRNA instead of Pri-miRNA in the first point of mechanism. Diagram of microRNA (miRNA) action with mRNA. Examples of miRNA stem-loops, with the mature miRNAs shown in red. MicroRNA ( miRNA) are small, single-stranded, non-coding RNA molecules containing 21 to 23 nucleotides. [1] Found in plants, animals and some viruses, miRNAs ...
Hace 5 días · Etymology. The name "coronavirus" is derived from Latin corona, meaning "crown" or "wreath", itself a borrowing from Greek κορώνη korṓnē, "garland, wreath". The name was coined by June Almeida and David Tyrrell who first observed and studied human coronaviruses. The word was first used in print in 1968 by an informal group of virologists in the journal Nature to designate the new ...
Hace 4 días · Visna-maedi virus. The human immunodeficiency viruses ( HIV) are two species of Lentivirus (a subgroup of retrovirus) that infect humans. Over time, they cause acquired immunodeficiency syndrome (AIDS), [1] [2] a condition in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. [3]
Hace 4 días · The English word "virus" comes from the Latin vīrus, which refers to poison and other noxious liquids. Vīrus comes from the same Indo-European root as Sanskrit viṣa, Avestan vīša, and Ancient Greek ἰός (iós), which all mean "poison".The first attested use of "virus" in English appeared in 1398 in John Trevisa's translation of Bartholomeus Anglicus's De Proprietatibus Rerum.
1 de may. de 2024 · mRNA in vitro transcription, innate and adaptive immunity activation. An mRNA vaccine is a type of vaccine that uses a copy of a molecule called messenger RNA (mRNA) to produce an immune response. The vaccine delivers molecules of antigen-encoding mRNA into immune cells, which use the designed mRNA as a blueprint to build foreign protein that would normally be produced by a pathogen (such as a ...
