Preferred Name

Alpha-Tocopherol
Synonyms
Definitions

The orally bioavailable alpha form of the naturally-occurring fat-soluble vitamin E, with potent antioxidant and cytoprotective activities. Upon administration, alpha-tocopherol neutralizes free radicals, thereby protecting tissues and organs from oxidative damage. Alpha-tocopherol gets incorporated into biological membranes, prevents protein oxidation and inhibits lipid peroxidation, thereby maintaining cell membrane integrity and protecting the cell against damage. In addition, alpha-tocopherol inhibits the activity of protein kinase C (PKC) and PKC-mediated pathways. Alpha-tocopherol also modulates the expression of various genes, plays a key role in neurological function, inhibits platelet aggregation and enhances vasodilation. Compared with other forms of tocopherol, alpha-tocopherol is the most biologically active form and is the form that is preferentially absorbed and retained in the body.

ID

http://purl.obolibrary.org/obo/NCIT_C74960

ALT_DEFINITION

Tocopherol with three methyl groups on its chromanol ring.

CAS_Registry

59-02-9

CHEBI_ID

CHEBI:18145

Chemical_Formula

C29H50O2

code

C74960

Contributing_Source

CRCH

CTRP

FDA

definition

The orally bioavailable alpha form of the naturally-occurring fat-soluble vitamin E, with potent antioxidant and cytoprotective activities. Upon administration, alpha-tocopherol neutralizes free radicals, thereby protecting tissues and organs from oxidative damage. Alpha-tocopherol gets incorporated into biological membranes, prevents protein oxidation and inhibits lipid peroxidation, thereby maintaining cell membrane integrity and protecting the cell against damage. In addition, alpha-tocopherol inhibits the activity of protein kinase C (PKC) and PKC-mediated pathways. Alpha-tocopherol also modulates the expression of various genes, plays a key role in neurological function, inhibits platelet aggregation and enhances vasodilation. Compared with other forms of tocopherol, alpha-tocopherol is the most biologically active form and is the form that is preferentially absorbed and retained in the body.

Display_Name

Alpha-Tocopherol

FDA_UNII_Code

H4N855PNZ1

in_subset

http://purl.obolibrary.org/obo/NCIT_C63923

http://purl.obolibrary.org/obo/NCIT_C176424

http://purl.obolibrary.org/obo/NCIT_C116977

http://purl.obolibrary.org/obo/NCIT_C142799

INFOODS

TOCPHA

label

Alpha-Tocopherol

Legacy Concept Name

Alpha-Tocopherol

Macronutrient

Y

NCI_Drug_Dictionary_ID

775583

NCI_META_CUI

CL938214

NSC Number

20812

Nutrient

Y

PDQ_Closed_Trial_Search_ID

775583

PDQ_Open_Trial_Search_ID

775583

Preferred_Name

Alpha-Tocopherol

prefixIRI

NCIT:C74960

prefLabel

Alpha-Tocopherol

Semantic_Type

Pharmacologic Substance

Vitamin

Unit

mg

USDA_ID

323

subClassOf

http://purl.obolibrary.org/obo/NCIT_C68313

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