Deficiency

The term 'Deficiency' refers to a medical condition or physiological state characterized by an inadequate supply or lack of a specific nutrient, hormone, enzyme, or other essential biological component [1]. Common examples include nutritional deficiencies, such as iron or Vitamin D deficiency, and genetic deficiencies, such as Adenosine deaminase deficiency or Alpha-1 antitrypsin deficiency [2]. In the context of drug discovery and pharmacology, a 'deficiency' is not a therapeutic target (like a G protein-coupled receptor or an ion channel) but is instead the clinical state that therapeutic interventions seek to rectify, often through replacement therapy or supplementation [3]. Because it describes a broad clinical status or the absence of a biological entity rather than a specific protein, nucleic acid, or signaling molecule that can be pharmacologically modulated, it does not meet the criteria for a canonical therapeutic target [4]. Citations: [1] MedlinePlus (2023) 'Nutritional Deficiencies', National Institutes of Health; [2] StatPearls (2023) 'Inborn Errors of Metabolism', NIH National Library of Medicine; [3] Nature Reviews Drug Discovery (2017) 'The druggable genome and the nature of therapeutic targets'; [4] IUPHAR/BPS Guide to PHARMACOLOGY 'Target classification'.

Other names

InsufficiencyLackDepletionDeficitShortage

Not applicable as 'Deficiency' refers to a physiological state or medical condition rather than a specific molecular target (e.g., protein, receptor, or enzyme).