Short Tandem Repeats (STRs) are repeated short stretches of DNA and are analyzed by measuring the length of the repeated region. They vary from individual to individual and are passed from parent to child. STR analysis is broadly used in medicine, research and law enforcement – for stem cell transplants, diseases like Huntington’s, verifying research cell lines and samples, determining family relationships, and in criminal cases. In this blog post, we explore how you use OSIRIS in the real world and how your feedback has helped us improve this product.
Using OSIRIS in a Clinical Setting
Did you know that you can use STR analysis to monitor transplant progress in bone marrow and stem cell transplants?
“We use [OSIRIS] to look for small quantities of donor material in hematopoietic cells and look for the presence of donor/recipient material in other cell populations.”
– OSIRIS clinical user
Currently, the NIH Clinical Center ensures proper transplant care and support by using OSIRIS to monitor stem cell transplants. In one case, the first transplant for an NIH patient failed within a week, and a second transplant threatened to fail as well. However, rapid OSIRIS testing by the lab allowed the patient’s doctor to administer timely treatments to support the second transplant’s engraftment of donor cells. After nine months, OSIRIS testing showed the patient’s transplant was fully engrafted, and allowed the patient to finally go home.
Forensic and CODIS Testing
The FBI approved OSIRIS as an expert system for analyzing CODIS National DNA Databank samples. Federal and State laboratories use OSIRIS for high-throughput testing of many tens of thousands of criminal cases and CODIS samples, allowing the police to solve those unsolvable cases.
“OSIRIS analysis resulted in a 95% reduction in editing of analyzed profiles.” – OSIRIS DNA database user
Making OSIRIS Work Better for You
We worked with OSIRIS users like you to identify key areas of improvement and have many exciting new features to offer, including:
- A new and improved website
- Sensitive allele identification
- Adaptive artifact identification
- Artifact labeling (Figure 1)
- Rapid calling – ~30 seconds per analysis
- Allele-specific stutter thresholds
- Simple editing
How does it work?
OSIRIS uses mathematical algorithms to identify and eliminate the effect of artifacts and noise in the process of DNA profile analysis, providing automated quality control with increased accuracy and sensitivity. Advanced algorithms make analysis faster, allowing rapid analysis turnaround. You can also use OSIRIS more broadly for quality control of the entire laboratory STR analysis process.
Give OSIRIS a try today!
OSIRIS is a free software package for short tandem repeat (STR) DNA profile analysis produced by the NCBI. Download the User Guide and software for free. Please contact us at firstname.lastname@example.org with any questions or suggestions about OSIRIS.
“Thanks to all of you for your hard work on this most excellent tool. I want to let you know that OSIRIS is my main workhorse, and I tout it whenever possible and appropriate.” – OSIRIS forensic user