Repositioning Candidate Details
| Candidate ID: | R1347 |
| Source ID: | DB11193 |
| Source Type: | approved |
| Compound Type: | small molecule |
| Compound Name: | Papain |
| Synonyms: | Papain |
| Molecular Formula: | -- |
| SMILES: | -- |
| DrugBank Description: | Papain, also known as papaya proteinase I, is a cysteine protease (EC 3.4.22.2) enzyme that is found in species of papaya, _Carica papaya_ and _Vasconcellea cundinamarcensis_. The enzyme is found to be localized in the skin of papaya, and is collected from slashed unripe papayas as a crude latex. Papain is used in food, pharmaceutical, textile, and cosmetic industries. While it has been used for the treatment of inflammation and pain via topical administration, papain has also shown to have anthelmintic and tooth-whitening properties. Present in over-the-counter mixture products consisting of different digestive enzymes, its active site contains a catalytic diad that plays a role in breaking peptide bonds. Papain is also used as an ingredient in various enzymatic debriding preparations. |
| CAS Number: | 9001-73-4 |
| Molecular Weight: | |
| DrugBank Indication: | No FDA-approved therapeutic indications. |
| DrugBank Pharmacology: | Papain is a digestive enzyme and often acts as a skin allergen. |
| DrugBank MoA: | When topically applied, papain induces an allergen-like inflammatory response via recruiting neutrophils, mast cells, and CD3-positive cells and by induction of a TH2-biased antibody response . _In vitro_, treatment of papain resulted in the breakdown of tight junctions of primary human keratinocytes that maintain the epithelial barrier integrity. These tight junction proteins include zonula occludens-1, claudin-4, and occludin . It is proposed that papain induces allergic responses via activation of TLR4, leading to an increase in neutrophils, CD3+ cells, mast cells, and CCL8-positive cells . |
| Targets: | Toll-like receptor 4 activator |
| Inclusion Criteria: | Therapeutic strategy associated |
| Strategy ID | Strategy | Synonyms | Related Targets | Related Drugs | |
|---|---|---|---|---|---|
| S05 | Anti-inflammatory | inflammatory | Bile acid; TNF-a inhibitor; Dual PPAR-α and -δ agonists; Toll-Like Receptor; (TLR)-4 antagonist; Caspase inhibitor; ASK-1 inhibitor | Ursodeoxycholic Acid; Pentoxifylline; Elafibranor; JKB-121; Emricasan; Selonsertib; | Details |
| Target ID | Target Name | GENE | Action | Class | UniProtKB ID | Entry Name | |
|---|---|---|---|---|---|---|---|
| T09 | Toll-like receptor 4 | TLR4 | antagonist | Membrane receptor | O00206 | TLR4_HUMAN | Details |
| T21 | Diacylglycerol O-acyltransferase 2 | DGAT2 | inhibitor | Enzyme | Q96PD7 | DGAT2_HUMAN | Details |
| T07 | Bile acid receptor | NR1H4 | agonist | Nuclear hormone receptor | Q96RI1 | NR1H4_HUMAN | Details |
| Diseases ID | DO ID | Disease Name | Definition | Class |
|---|