Researchers create efficient semisynthesis of biopharmaceutic-Fc conjugates

Researchers report on biopharmaceutic-Fc conjugates
Biopharmaceutic-Fc conjugate synthesized by our method possessed a long half-life inside the body. Credit: University of Electro Communications

Biopharmaceutics consisting of middle molecules, for example, peptide or nucleic-acid aptamers, have been attracting attention as promising molecular modalities in current drug discovery.

A major problem of such pharmaceutics for therapeutic applications is that the half-lives of their circulating plasma inside the body are too short. Ideally, a precise conjugation of the Fc fragment of human antibodies with pharmaceutics would extend the half-lives. Practically, the conjugation between the complicated molecules is still immature.

Now, Masumi Taki and colleagues at the University of Electro-Communications (UEC), and Ajinomoto Co. Inc. have established a facile and efficient semisynthesis method to obtain biopharmaceutics-Fc conjugates.

A combination of chemoenzymatic novel reaction (i.e., the NEXT-A reaction) followed by well-known yielded almost 100% ; and the N-terminal specific precise conjugation of the Fc fragment with different kinds of biopharmaceutics was unambiguously identified by several methods including deconvoluted .

A Fc-conjugated (peptidic) pharmaceutic synthesized by this method led to a long-circulating plasma half-life inside mice while retaining its original biological activity.

The Fc-conjugation platform described can be applied many kinds of biopharmaceutics with different molecular modalities.


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More information: Shigeo Hirasawa et al. Facile and Efficient Chemoenzymatic Semisynthesis of Fc-Fusion Compounds for Half-Life Extension of Pharmaceutical Components, Bioconjugate Chemistry (2019). DOI: 10.1021/acs.bioconjchem.9b00235
Journal information: Bioconjugate Chemistry

Citation: Researchers create efficient semisynthesis of biopharmaceutic-Fc conjugates (2019, September 11) retrieved 15 September 2019 from https://phys.org/news/2019-09-efficient-semisynthesis-biopharmaceutic-fc-conjugates.html
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