Internalization of Methotrexate Conjugates by Folate Receptor-α
Eugénia Nogueira1, Marisa P Sárria1,2, Nuno G Azoia1
1Centre of Biological Engineering , University of Minho , Campus of Gualtar , 4710-057 Braga , Portugal.
Biochemistry
|November 20, 2018
Summary
Methotrexate enters cells via folate transporters. This study reveals methotrexate
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Methotrexate (MTX) is a vital antifolate chemotherapy agent.
- MTX cellular uptake occurs via the reduced folate carrier (RFC) and folate receptors (FRs).
- The precise mechanism of FR-mediated MTX uptake remains largely unelucidated.
Purpose of the Study:
- To elucidate the mechanism of MTX uptake mediated by folate receptor-alpha (FRα).
- To investigate the role of MTX's chemical structure in FRα interaction.
Main Methods:
- Utilized two fluorescently labeled methotrexate conjugates with distinct terminal group linkages.
- Analyzed the uptake mechanism of these conjugates via folate receptor-alpha.
Main Results:
- Demonstrated that specific amino groups of methotrexate are crucial for FRα interaction.
- Provided mechanistic insights into how FRα recognizes and transports methotrexate.
Conclusions:
- Methotrexate's amino groups play a critical role in its interaction with folate receptor-alpha.
- Findings facilitate the development of targeted antifolate therapies by clarifying FRα-mediated transport.
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