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BIO-INSPIRED MAGNETIC BEADS FOR ISOLATION OF SPERM FROM HETEROGENOUS SAMPLES IN FORENSIC APPLICATIONS
Fatih Inci1, Merve Goksin Karaaslan1, Rakhi Gupta1
1Canary Center at Stanford for Cancer Early Detection, Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Department of Radiology, Stanford School of Medicine, Stanford University, Palo Alto, CA 94304, USA.
Forensic Science International. Genetics
|February 8, 2021
Summary
A novel magnetic bead technique using Sialyl-LewisX rapidly isolates sperm from sexual assault evidence. This innovation accelerates forensic investigations and helps reduce evidence processing backlogs.
Area of Science:
- Forensic Science
- Biotechnology
- Biochemistry
Background:
- Current forensic laboratory protocols for sexual assault evidence processing face challenges due to increasing sample complexity and volume.
- Standardized methods require innovation to improve efficiency and reduce casework backlogs.
Purpose of the Study:
- To develop and present a new, rapid, and cost-effective method for selectively isolating sperm cells from forensic samples.
- To adapt existing differential extraction techniques with a bio-inspired magnetic bead strategy.
Main Methods:
- Integration of a bio-inspired oligosaccharide, Sialyl-LewisX, with magnetic beads for selective sperm capture.
- Utilizing small sample volumes (approximately 200 μL) for processing.
- Developing a protocol for rapid sperm isolation within 25 minutes.
Main Results:
- The Sialyl-LewisX-functionalized magnetic bead platform demonstrates selective sperm capture capabilities.
- The method is sensitive and meets forensic analysis cut-off requirements.
- The technique is cost-effective, automatable on existing laboratory platforms, and efficient for small sample volumes.
Conclusions:
- This magnetic bead-based strategy offers a rapid (25-minute processing time) and efficient solution for sperm isolation in forensic investigations.
- The technique has the potential to significantly accelerate forensic analysis and reduce casework backlogs.
- The platform's adaptability to current forensic laboratory practices makes it a promising advancement.
