Details of Drug-Drug Interaction
| Drug General Information (ID: DDIQUDIAM2) | |||||||||
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| Drug Name | Metyrosine | Drug Info | Pentoxifylline | Drug Info | |||||
| Drug Type | Small molecule | Small molecule | |||||||
| Therapeutic Class | Antineoplastics | Vasodilator Agents | |||||||
| Structure | |||||||||
| Mechanism of Metyrosine-Pentoxifylline Interaction (Severity Level: Moderate) | |||||||||
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| Additive hypotensive effects Click to Show/Hide Mechanism Graph | |||||||||
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| Drug Name | Metyrosine | Pentoxifylline | |||||||
| Mechanism 1 |
Antihypertensive agent Tyrosine 3-monooxygenase Binder |
Antihypertensive agent | |||||||
| Key Mechanism Factor 1 | |||||||||
| Factor Name | Tyrosine 3-monooxygenase |
×
Structure
Sequence
MPTPDATTPQAKGFRRAVSELDAKQAEAIMVRGQGAPGPSLTGSPWPGTAAPAASYTPTPRSPRFIGRRQSLIEDARKEREAAVAAAAAAVPSEPGDPLEAVAFEEKEGKAVLNLLFSPRATKPSALSRAVKVFETFEAKIHHLETRPAQRPRAGGPHLEYFVRLEVRRGDLAALLSGVRQVSEDVRSPAGPKVPWFPRKVSELDKCHHLVTKFDPDLDLDHPGFSDQVYRQRRKLIAEIAFQYRHGDPIPRVEYTAEEIATWKEVYTTLKGLYATHACGEHLEAFALLERFSGYREDNIPQLEDVSRFLKERTGFQLRPVAGLLSARDFLASLAFRVFQCTQYIRHASSPMHSPEPDCCHELLGHVPMLADRTFAQFSQDIGLASLGASDEEIEKLSTLYWFTVEFGLCKQNGEVKAYGAGLLSSYGELLHCLSEEPEIRAFDPEAAAVQPYQDQTYQSVYFVSESFSDAKDKLRSYASRIQRPFSVKFDPYTLAIDVLDSPQAVRRSLEGVQDELDTLAHALSAIG
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| Gene Name | TH | ||||||||
| Uniprot ID | TY3H_HUMAN | ||||||||
| KEGG Pathway | hsa:7054 | ||||||||
| Protein Family | Biopterin-dependent aromatic amino acid hydroxylase family | ||||||||
| Protein Function |
Catalyzes the conversion of L-tyrosine to L-dihydroxyphenylalanine (L-Dopa), the rate-limiting step in the biosynthesis of cathecolamines, dopamine, noradrenaline, and adrenaline. Uses tetrahydrobiopterin and molecular oxygen to convert tyrosine to L-Dopa (PubMed:17391063, PubMed:1680128, PubMed:15287903, PubMed:8528210, Ref.18, PubMed:34922205, PubMed:24753243). In addition to tyrosine, is able to catalyze the hydroxylation of phenylalanine and tryptophan with lower specificity (By similarity). Positively regulates the regression of retinal hyaloid vessels during postnatal development (By similarity).
Click to Show/Hide
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| Mechanism Description |
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| Mechanism 2 |
Antihypertensive agent Tyrosine 3-monooxygenase Binder |
Hypotensive effects | |||||||
| Key Mechanism Factor 2 | |||||||||
| Factor Name | Tyrosine 3-monooxygenase |
×
Structure
Sequence
MPTPDATTPQAKGFRRAVSELDAKQAEAIMVRGQGAPGPSLTGSPWPGTAAPAASYTPTPRSPRFIGRRQSLIEDARKEREAAVAAAAAAVPSEPGDPLEAVAFEEKEGKAVLNLLFSPRATKPSALSRAVKVFETFEAKIHHLETRPAQRPRAGGPHLEYFVRLEVRRGDLAALLSGVRQVSEDVRSPAGPKVPWFPRKVSELDKCHHLVTKFDPDLDLDHPGFSDQVYRQRRKLIAEIAFQYRHGDPIPRVEYTAEEIATWKEVYTTLKGLYATHACGEHLEAFALLERFSGYREDNIPQLEDVSRFLKERTGFQLRPVAGLLSARDFLASLAFRVFQCTQYIRHASSPMHSPEPDCCHELLGHVPMLADRTFAQFSQDIGLASLGASDEEIEKLSTLYWFTVEFGLCKQNGEVKAYGAGLLSSYGELLHCLSEEPEIRAFDPEAAAVQPYQDQTYQSVYFVSESFSDAKDKLRSYASRIQRPFSVKFDPYTLAIDVLDSPQAVRRSLEGVQDELDTLAHALSAIG
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| Gene Name | TH | ||||||||
| Uniprot ID | TY3H_HUMAN | ||||||||
| KEGG Pathway | hsa:7054 | ||||||||
| Protein Family | Biopterin-dependent aromatic amino acid hydroxylase family | ||||||||
| Protein Function |
Catalyzes the conversion of L-tyrosine to L-dihydroxyphenylalanine (L-Dopa), the rate-limiting step in the biosynthesis of cathecolamines, dopamine, noradrenaline, and adrenaline. Uses tetrahydrobiopterin and molecular oxygen to convert tyrosine to L-Dopa (PubMed:17391063, PubMed:1680128, PubMed:15287903, PubMed:8528210, Ref.18, PubMed:34922205, PubMed:24753243). In addition to tyrosine, is able to catalyze the hydroxylation of phenylalanine and tryptophan with lower specificity (By similarity). Positively regulates the regression of retinal hyaloid vessels during postnatal development (By similarity).
Click to Show/Hide
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| Mechanism Description |
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| Recommended Action | |||||||||
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| Management | Caution is advised if pentoxifylline is used in combination with hypotensive agents. Periodic systemic blood pressure monitoring is recommended. | ||||||||
| References | |||||||||||||||||||
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| 1 | Product Information. Trental (pentoxifylline). Hoechst Marion-Roussel Inc, Kansas City, MO. | ||||||||||||||||||

