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L-folinic acid

The Christie NHS Foundation Trust · Phase 3 active Small molecule

L-folinic acid is a reduced form of folic acid that acts as a methyl donor and cofactor in one-carbon transfer reactions essential for DNA synthesis and cell division.

L-folinic acid is a reduced form of folic acid that acts as a methyl donor and cofactor in one-carbon transfer reactions essential for DNA synthesis and cell division. Used for Methotrexate toxicity rescue, Adjunct to fluorouracil-based chemotherapy in colorectal cancer and other malignancies.

At a glance

Generic nameL-folinic acid
Also known asFolinic acid, LFA, ELVORIN
SponsorThe Christie NHS Foundation Trust
Drug classReduced folate cofactor / Chemotherapy adjuvant
TargetThymidylate synthase (indirect), one-carbon metabolism
ModalitySmall molecule
Therapeutic areaOncology
PhasePhase 3

Mechanism of action

L-folinic acid (leucovorin) is the active form of folic acid that bypasses the need for dihydrofolate reductase conversion, making it immediately available for one-carbon metabolism. It is commonly used as a rescue agent to mitigate toxicity from methotrexate and other antifolate drugs, and as an adjunct to fluorouracil-based chemotherapy to enhance efficacy by stabilizing the ternary complex of thymidylate synthase.

Approved indications

Common side effects

Key clinical trials

Primary sources

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SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results