Raman spectroscopic platform for transcutaneous monitoring of bone quality

NIH RePORTER · AR · R01 · $488,612 · view on reporter.nih.gov ↗

Abstract

Osteoporosis (OP) is a global health concern with enormous socioeconomic burdens. Alarmingly, rates of osteoporosis screening using standard dual-energy x-ray absorptiometry (DXA) are abysmal, which contributes to high rates of preventable fragility fractures. Our long-term objective is to develop an accessible screening method based on Raman spectroscopy (RS) for early, accurate identification of at-risk patients during visits to primary care providers or community clinics. We posit that this would increase referrals for a gold standard DXA diagnosis and earlier interventions to reduce the incidence of preventable fragility fractures. We previously demonstrated the reliability and sensitivity of RS to detect biochemical changes associated with bone diseases in various mouse models and reported robust correlations of Raman spectral features with whole bone strength and fracture toughness. We also developed instrumentation and sophisticated algorithms to subtract optical contributions from overlying soft tissue to enable reliable diagnostically sensitive transcutaneous RS (tRS) of murine bone on intact limbs. As we pivot to scale up our instrumentation to make diagnostic measurements in humans, we are addressing three significant challenges. First, the ability to make reliable transcutaneous bone measurements is hampered by the signal from the thick layers of soft tissues that overlay the bone. Therefore, we identified the phalanges and metacarpals in the hand as anatomical sites suitable for tRS measurements, which can be accomplished by adjusting illumination source-detector offsets and establishing spectral libraries of various tissues. Second, there are no currently demonstrable associations between RS of peripheral bones of the hand and BMD at the clinically relevant sites of fragility fractures such as the wrist, hip, and spine. Third, there is currently no evidence that RS of bone can be safely and reliably acquired in living subjects for bone health diagnosis

Key facts

NIH application ID
11323131
Project number
5R01AR070613-09
Recipient
UNIVERSITY OF ROCHESTER
Principal Investigator
Hani A Awad; ANDREW J BERGER
Activity code
R01
Funding institute
AR
Fiscal year
2026
Award amount
$488,612
Award type
5
Project period
2016-07-01T00:00:00 → 2028-04-30T00:00:00