Methods for purification of messenger RNA
First Claim
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1. A method of large scale purification of messenger RNA (mRNA), comprising:
- providing an impure preparation comprising in vitro synthesized mRNA greater than 1 gram and prematurely aborted RNA sequences;
treating the impure preparation with a denaturing agent under conditions that facilitate separation of the prematurely aborted RNA sequences from the mRNA;
precipitating the mRNA from the treated impure preparation;
subjecting a heterogeneous suspension comprising the precipitated mRNA to tangential flow filtration such that the precipitated mRNA is captured by a filtration membrane; and
eluting the captured precipitated mRNA from the membrane by re-solubilizing the mRNA, thereby resulting in a purified mRNA solution,wherein the mRNA has a coding region that encodes cystic fibrosis conductance regulator protein.
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Abstract
The present invention provides, among other things, methods of purifying messenger RNA (mRNA) including the steps of (a) precipitating mRNA from an impure preparation; (b) subjecting the impure preparation comprising precipitated mRNA to a purification process involving membrane filtration such that the precipitated mRNA is captured by a membrane; and (c) eluting the captured precipitated mRNA from the membrane by re-solubilizing the mRNA, thereby resulting in a purified mRNA solution. In some embodiments, a purification process involving membrane filtration suitable for the present invention is tangential flow filtration.
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Citations
16 Claims
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1. A method of large scale purification of messenger RNA (mRNA), comprising:
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providing an impure preparation comprising in vitro synthesized mRNA greater than 1 gram and prematurely aborted RNA sequences; treating the impure preparation with a denaturing agent under conditions that facilitate separation of the prematurely aborted RNA sequences from the mRNA; precipitating the mRNA from the treated impure preparation; subjecting a heterogeneous suspension comprising the precipitated mRNA to tangential flow filtration such that the precipitated mRNA is captured by a filtration membrane; and eluting the captured precipitated mRNA from the membrane by re-solubilizing the mRNA, thereby resulting in a purified mRNA solution, wherein the mRNA has a coding region that encodes cystic fibrosis conductance regulator protein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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