Dr. Mandair studies osteoarthritis, a common joint condition that causes pain and stiffness. His research utilizes a technology called Raman spectroscopy, which involves shining light on small samples of joint fluid to analyze their chemical properties. This technique allows for the early diagnosis of osteoarthritis by identifying specific markers of joint damage. His work is significant because it empowers doctors to provide quicker and more precise assessments, thereby enhancing treatment decisions for patients suffering from this debilitating condition.
Key findings
Raman spectroscopy can detect joint damage markers in 40 osteoarthritis patients with a simple yes or no answer regarding the presence of moderate-to-severe osteoarthritis.
The method provides faster results and requires only microscopic amounts of synovial fluid, making it less invasive than traditional diagnostic methods.
Analysis shows that the Raman technique offers more detailed information about the chemical changes in joint fluid compared to existing standards.
Frequently asked questions
Does Dr. Mandair study osteoarthritis?
Yes, Dr. Mandair specifically focuses on diagnosing osteoarthritis using innovative techniques.
What treatments has Dr. Mandair researched?
His research mainly revolves around improving diagnosis rather than direct treatments, using Raman spectroscopy to identify joint damage.
How does Dr. Mandair's work help patients?
His work helps patients by providing faster and more accurate diagnoses of osteoarthritis, which can lead to timely and effective treatment.
Publications in plain English
Region-specific associations among tissue-level mechanical properties, porosity, and composition in human male femora.
Plain English This study looked at how different areas of the thigh bone (femur) in men change as they age, particularly focusing on their strength and structure. Researchers tested 33 bones from men aged 18 to 89 and found that older bones were weaker and had more holes (porosity) in specific areas, with the anterior part showing the most significant decline in strength. Understanding these differences is important because it helps us improve strategies for preventing fractures in older adults.
Who this helps: Patients, especially older men at risk of bone fractures.
Matrix/mineral ratio and domain size variation with bone tissue age: A photothermal infrared study.
2022
Journal of structural biology
Ahn T, Jueckstock M, Mandair GS, Henderson J, Sinder BP +2 more
Plain English This study looked at how the chemical makeup of bone changes as it gets older, focusing on the ratio of organic material (matrix) to minerals. Researchers used advanced imaging techniques and found that as bone matures, the matrix/mineral ratio generally decreases, showing a lot of variation in younger bones compared to older ones. This is important because understanding how bone materials change with age can help in diagnosing and treating bone-related diseases.
Who this helps: This benefits doctors and patients dealing with bone health issues.
Collagen cross-link profiles and mineral are different between the mandible and femur with site specific response to perturbed collagen.
2022
Bone reports
Romanowicz GE, Terhune AH, Bielajew BJ, Sexton B, Lynch M +3 more
Plain English This study looked at how collagen and minerals in bones differ between the jaw (mandible) and thigh (femur) and how these differences affect bone quality when collagen formation is disrupted. Researchers found that the jaw had about 8.3 times more of a specific sugar product (CML) than the thigh, and that the jaw showed better collagen quality and resistance to stress. These findings are important because they highlight that bones in different parts of the body react differently to changes, which could impact how bone diseases develop and are treated.
Who this helps: This helps patients with bone diseases and doctors treating them.
Altered collagen chemical compositional structure in osteopenic women with past fractures: A case-control Raman spectroscopic study.
2021
Bone
Mandair GS, Akhter MP, Esmonde-White FWL, Lappe JM, Bare SP +6 more
Plain English This study investigated the differences in bone quality between osteopenic women who have suffered fractures and those who haven’t. Researchers analyzed bone tissue from 59 women with fractures and 59 without, finding two specific measurements (1244/1268 and 1044/959 ratios) that could indicate fracture risk, with odds ratios of 0.617 and 1.656, meaning these measurements show a significant association with previous fractures. This research is important because it highlights that changes in the structure of collagen in bones may be a key factor in understanding fractures in these women.
Who this helps: This helps osteopenic women at risk for fractures and their healthcare providers.
Therapeutic Interventions to Reduce Radiation Induced Dermal Injury in a Murine Model of Tissue Expander Based Breast Reconstruction.
2020
Annals of plastic surgery
Luby AO, Snider AE, Mandair GS, Urlaub KM, Lynn JV +6 more
Plain English This study looked at how radiation therapy harms skin tissue during breast reconstruction using tissue expanders in female rats. It found that radiation caused significant damage to collagen, which is crucial for skin strength and elasticity, with damaged collagen levels increasing from 22.4% to 83.8%. However, the drugs amifostine (AMF) and deferoxamine (DFO) showed promise in protecting collagen integrity, with AMF reducing damage to levels seen in untreated skin.
Who this helps: This research benefits patients undergoing breast reconstruction, especially those receiving radiation therapy.
Radiation-induced changes to bone composition extend beyond periosteal bone.
2020
Bone reports
Mandair GS, Oest ME, Mann KA, Morris MD, Damron TA +1 more
Plain English This study looked at how radiation therapy for soft tissue sarcomas affects different parts of the bone in mice. The researchers found that after radiation, the inner part of the bone changed more significantly compared to the outer parts, with some changes noticeable as soon as two weeks later. These changes in bone composition, which make bones weaker, can increase the risk of fractures in cancer patients treated with radiation, highlighting the importance of monitoring bone health in these individuals.
Who this helps: This helps patients undergoing radiation therapy for cancer.
External Bone Size Is a Key Determinant of Strength-Decline Trajectories of Aging Male Radii.
2019
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research
Bigelow EM, Patton DM, Ward FS, Ciarelli A, Casden M +8 more
Plain English This study looked at how the size of bones, specifically the radius in male forearms, affects their strength as men age. Researchers found that wide bones were significantly stronger than narrow ones in younger adults (54% stronger), but as men got older, wide bones showed a greater drop in strength compared to narrow bones. This is important because understanding how bone size and strength change with age can help doctors make better decisions to prevent fractures in older men.
Who this helps: This helps patients, especially older men at risk for bone fractures.
Bone quality assessment of osteogenic cell cultures by Raman microscopy.
2019
Journal of Raman spectroscopy : JRS
Mandair GS, Steenhuis P, Ignelzi MA, Morris MD
Plain English This study looked at how well bone created in a lab using stem cells from mouse skulls compares to natural bone from newborn mice. After 28 days of growing the cells, the lab-made bone showed similar mineral quality to that of the mice but had less organized collagen structure. This is important because it helps scientists understand the potential of using stem cells for repairing bone defects, even though the lab-created bone isn't quite as strong as natural bone.
Who this helps: This helps researchers and medical professionals working on bone repair treatments.
Bone morphogenetic protein signaling through ACVR1 and BMPR1A negatively regulates bone mass along with alterations in bone composition.
2018
Journal of structural biology
Shi C, Mandair GS, Zhang H, Vanrenterghem GG, Ridella R +6 more
Plain English Researchers studied how two specific proteins, Acvr1 and Bmpr1a, affect bone strength and quality by looking at mice with these proteins removed in bone-forming cells. They found that mice without these proteins had increased bone mass, especially in the trabecular (spongy) bone, with Bmpr1a deletion leading to even higher bone mass. This finding highlights the importance of these proteins in maintaining healthy bone structure and could lead to better treatments for bone-related diseases.
Who this helps: Patients with osteoporosis and other bone health issues.
Hox11 Function Is Required for Region-Specific Fracture Repair.
2017
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research
Rux DR, Song JY, Pineault KM, Mandair GS, Swinehart IT +5 more
Plain English Researchers studied the role of Hox11 genes in healing bone fractures, focusing on specific areas of the limb skeleton. They found that when Hox11 function is disrupted, the healing process is impaired—particularly in the early formation of cartilage and the later stages of bone remodeling, resulting in incomplete healing. These findings highlight the importance of Hox11 genes in effective fracture repair.
Who this helps: This research benefits doctors and patients with fractures by improving understanding of bone healing.
Raman microscopy of bladder cancer cells expressing green fluorescent protein.
2016
Journal of biomedical optics
Mandair GS, Han AL, Keller ET, Morris MD
Plain English This study looked at how turning off certain genes affects bladder cancer cells, specifically two cell lines called T24 and UMUC-13. Researchers found that when a gene was silenced in the UMUC-13 cells, these cells showed reduced levels of green fluorescent protein (which they used as a marker) and also experienced changes in their biochemical makeup, including a shift in protein structures. This is important because understanding these changes can help inform future treatments and approaches for bladder cancer.
Who this helps: Patients with bladder cancer and their doctors.
Contributions of Raman spectroscopy to the understanding of bone strength.
2015
BoneKEy reports
Mandair GS, Morris MD
Plain English This study looked at how a technique called Raman spectroscopy helps researchers understand what makes bones strong. It found that this technique can reveal important details about the mineral content and structure of bones, which are connected to their strength. For example, it identified how bone changes with age and conditions like osteoporosis and osteogenesis imperfecta. This understanding is important because it can lead to better treatments for bone-related diseases.
Who this helps: This helps patients with bone diseases and their doctors.
Novel assessment tools for osteoporosis diagnosis and treatment.
2014
Current osteoporosis reports
Gong B, Mandair GS, Wehrli FW, Morris MD
Plain English This research paper looks at new technologies that can help diagnose and treat osteoporosis in postmenopausal women and predict their risk of fractures. It discusses four promising methods: reference point indentation (RPI), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and magnetic resonance imaging (MRI), which all do not use harmful radiation. These advancements are important because they offer safer and potentially more accurate ways to assess bone health and fracture risk.
Who this helps: This helps postmenopausal women at risk for osteoporosis and their healthcare providers.
Plain English This study looked at how a technique called Raman spectroscopy can be used to measure the quality of bones. Researchers found that factors like the ratio of minerals to organic material in bone can indicate its strength and health, with specific measurements related to age and conditions like disease. This is important because better understanding bone quality could help predict fractures and improve treatment plans for individuals at risk.
Who this helps: This research benefits patients, especially older adults and those with bone-related diseases.
Raman spectroscopy of synovial fluid as a tool for diagnosing osteoarthritis.
2009
Journal of biomedical optics
Esmonde-White KA, Mandair GS, Raaii F, Jacobson JA, Miller BS +3 more
Plain English Researchers used a technique called Raman spectroscopy to analyze tiny samples of fluid from the knees of 40 osteoarthritis patients and found that it can detect the chemical fingerprints of joint damage. The method works by shining light on the fluid to reveal changes in its protein structure, allowing doctors to identify whether someone has moderate-to-severe osteoarthritis with a simple yes or no answer. This matters because it's faster, requires only microscopic amounts of fluid, and provides much more detailed information than the current standard methods doctors use.
Is photobleaching necessary for Raman imaging of bone tissue using a green laser?
2006
Biochimica et biophysica acta
Golcuk K, Mandair GS, Callender AF, Sahar N, Kohn DH +1 more
Plain English This study looked at whether a technique called photobleaching is needed when using a green laser to examine bone tissue with Raman imaging. The researchers found that photobleaching can reduce unwanted fluorescence background by over 80% in just two hours while being safe for the tissue after 40 minutes. Using advanced camera technology allows for quick capture of bone images in under 10 minutes, making this method efficient for studying bone.
Who this helps: This helps researchers studying bone health and conditions.
Getting more from IR-microscopy of resin-bound libraries.
2004
Molecular diversity
Mandair GS, Russell AE, Aston G, Bradley M
Plain English This study looked at using a special camera to take detailed infrared images of a large set of tiny plastic beads that hold different types of chemicals. Researchers were able to create high-quality images that can differentiate between similar chemicals with very close measurements, specifically a separation of 4 cm in their infrared signals. This is important because it helps scientists analyze complex mixtures more effectively, leading to better understanding and development of new materials.
Who this helps: This helps researchers and scientists working on new materials and chemical compounds.
Microscopic infrared mapping of chloromethylated polystyrene resin beads.
2004
Applied spectroscopy
Mandair GS, Yu Z, Galaffu N, Bradley M, Russell AE
Plain English This study looked at a specific type of plastic beads used in chemical research to see how well they can be analyzed using a technique called infrared microscopy. The researchers found that this method allowed them to see how different chemicals were attached to the beads at a very detailed level. This is important because it can help scientists improve how they use these beads in various chemical experiments, making their work more efficient and accurate.
Who this helps: This helps scientists and researchers working with chemical compounds.