➤ Get the DrugPatentWatch Daily Briefing

Get Daily Updates on Generic Entry, Litigation, Biosimilars, and more …

Serving leading biopharmaceutical companies globally:


Last Updated: September 30, 2020

DrugPatentWatch Database Preview

Patent: 5,989,873

➤ Get the DrugPatentWatch Daily Briefing
» See Plans and Pricing

« Back to Dashboard

Summary for Patent: 5,989,873
Title: Method of detecting gene expression and/or of preventing such expression in cells
Abstract:A method of amplifying a nucleotide sequence complementary to an mRNA template derived from genomic DNA. The method involves the following steps. A sample mixture containing an mRNA template and corresponding genomic DNA is provided, the genomic DNA including at least two exons separated by at least one intron. A pair of intron-blockers are introduced into the mixture, the intron-blockers comprising a sequence of intron-specific oligonucleotides modified to prevent nucleotide extension in conditions promoting polymerase chain reaction. A primer pair promoting amplification of cDNA derived from the mRNA template is introduced into the mixture and then reverse transcription polymerase chain reaction is carried out to amplify cDNA. Detection of the cDNA is proof of the existence of mRNA in the sample, and thus proof of expression of the corresponding gene. The method avoids false positives caused by amplification of genomic DNA as well as cDNA based on an mRNA template. The invention includes a method of suppressing gene expression in vivo, which comprises exposing cells containing a gene to be suppressed, made up of exons and at least one intron, to intron-blockers having nucleotide sequences that bind to the intron to prevent gene expression.
Inventor(s): Vinayagamoorthy; Thuraiayah (Saskatoon, Saskatchewan, CA), Schloss; Eric (Edmonton, Alberta, CA)
Application Number:08/929,302
Patent Claims:see list of patent claims

Details for Patent 5,989,873

Applicant Tradename Biologic Ingredient Dosage Form BLA Number Approval Date Patent No. Assignee Estimated Patent Expiration Status Orphan Source
Schering INTRON A interferon alfa-2b VIAL 103132 001 1986-06-04   Start Trial 2016-09-24 RX search
Schering INTRON A interferon alfa-2b VIAL 103132 002 1986-06-04   Start Trial 2016-09-24 RX search
Schering INTRON A interferon alfa-2b VIAL 103132 003 1986-06-04   Start Trial 2016-09-24 RX search
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Number >Approval Date >Patent No. >Assignee >Estimated Patent Expiration >Status >Orphan >Source

Make Better Decisions: Try a trial or see plans & pricing

Serving leading biopharmaceutical companies globally:

Boehringer Ingelheim
Johnson and Johnson

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.