Mar 13, 2012 15:58
12 yrs ago
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English term

bridging study

English Medical Medical (general) cancer studies
BRCA Sequencing: bridging study
[what does it mean exatly and what has this to do with bridge or bridging?]

Discussion

Tina Vonhof (X) Mar 13, 2012:
A bridging study is often done before conducting clinical trials in a new country. First, the researchers are going to compare data on efficacy etc. between the two different populations - what can they expect and what do they need to take into account in the new country. So, you could think of it as a pre-study before the actual study is done.

Responses

2 hrs
Selected

comparative extrapolative study

"A bridging study is defined as a supplemental study performed in the new region to provide pharmacodynamic or clinical data on efficacy, safety, dosage, and dose regimen in the new region that will allow extrapolation of the foreign clinical data to the new region." (http://www.google.ro/url?sa=t&rct=j&q=&esrc=s&source=web&cd=... - a bit incoherent
"A study performed to provide nonclinical or clinical data that allows extrapolation of the existing data from the drug product produced by the current process to the drug product from the changed process." (http://www.ema.europa.eu/docs/en_GB/document_library/Scienti...
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4 KudoZ points awarded for this answer. Comment: "Thank you!"
32 mins

study of different changes (bridging sequences) in DNA modification

I am not an expert in the field, but I do have a background in biology and chemistry.

I believe they are discussing genetic modifications in BRCA gene.
The bridging sequences seem to be possible modifications in the gene.

The following reference is my sources for saying that:

"The mutant Δ1–170 was created by deleting the same 0.5-kb NotI/AatII fragment from BRCA1 and inserting a 29-bp bridging sequence made by annealing the complementary synthetic oligonucleotides BH9924 and BH9925. "
http://www.jbc.org/content/275/49/38589.full

There is much more on the internet about BRCA along the same lines. The full article noted above should be helpful to you.
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Reference comments

28 mins
Reference:

Comparability Bridging Study

A study performed to provide nonclinical or clinical data that allows extrapolation of the existing data from the drug product produced by the current process to the drug product from the changed process.

http://www.ema.europa.eu/docs/en_GB/document_library/Scienti...
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