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Recent Patents on Biotechnology

Author(s): Masoud Hashemzaei, Mohammad Bagher Ghoshoon*, Mehrnaz Jamshidi, Fatemeh Moradbeygi and Ahmad Hashemzehi

DOI: 10.2174/1872208317666230503094451

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A Review on Romiplostim Mechanism of Action and the Expressive Approach in E. coli

Page: [95 - 109] Pages: 15

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Abstract

Immune thrombocytopenic purpura (ITP) is an autoimmune disorder determined by immune-mediated platelet demolition and reduction of platelet production. Romiplostim is a new thrombopoiesis motivating peptibody that binds and stimulates the human thrombopoietin receptor the patent of which was registered in 2008. It is used to treat thrombocytopenia in patients with chronic immune thrombocytopenic purpura. Romiplostim is a 60 kDa peptibody designed to inhibit cross-reacting immune responses. It consists of four high-affinity TPO-receptor binding domains for the Mpl receptor and one human IgG1 Fc domain. Escherichia coli is a good host for the fabrication of recombinant proteins such as romiplostim. The expression of a gene intended in E. coli is dependent on many factors such as a protein’s inherent ability to fold, mRNA’s secondary structure, its solubility, its toxicity preferential codon use, and its need for post-translational modification (PTM). This review focuses on the structure, function, mechanism of action, and expressive approach to romiplostim in E. coli.

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