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My research interests are in developing novel, multinuclear (23Na, 17O, 13C and 1H) magnetic resonance imaging and spectroscopic techniques for the early diagnosis and quantification of physiological and functional aberrations in pathologies such as arthritis, stroke, cancer and Alzheimer’s disease. Our pulse sequence developmental approaches exploit quadrupolar spin-dynamics, polarization transfer, multiple quantum coherences, indirect detection via chemical exchange and spin-locking T1ρ MRI for studying molecular dynamics in biological tissues in vivo.Specifically, T1ρ and Sodium MRI techniques are designed to map proteoglycan molecules (e.g. aggrecan) in cartilage as a biomarker for early arthritis in vivo. T1ρ MRI is also targeted to impart novel contrast in various tissue types (brain, connective tissues and tumors), and to detect metabolically produced H217O for studying cerebral blood flow and cerebral oxidative metabolism.Recent developmental work on chemical exchange saturation transfer (CEST) based MRI methods is focused on measuring endogenous but low concentration metabolites in the brain, such as glutamate, myoinositol and creatine to address central nervous system disorders. In addition, a creatine CEST method is currently being explored to measure high-energy phosphate metabolism in the myocardium in heart disease.
Kumar D, Benyard B, Soni ND, Swain A, Wilson N, Reddy R.: Feasibility of transient nuclear Overhauser effect imaging ain brain at 7T. Magn Reson Med. 89 ((4)): 1357,2023.
Benyard B, Nanga RPR, Wilson NE, Thakuri D, Jacobs PS, Swain A, Kumar D, Reddy R.: In vivo reproducibility of 3D relayed NOE in the healthy human brain at 7T. Magn Reson Med. : 2023.
Lucas A, Nanga RPR, Hadar P, Chen S, Gibson A, Oechsel K, Elliott MA, Stein JM, Das S, Reddy R, Detre JA, Davis KA.: Mapping hippocampal glutamate in mesial temporal lobe epilepsy with glutamate weighted CEST (GluCEST) imaging Hum Brain Mapp 44 ((2)): 549,2023.
Jacobs PS, Benyard B, Cember A, Nanga RPR, Cao Q, Tisdall MD, Wilson N, Das S, Davis KA, Detre J, Roalf D, Reddy R.: Repeatability of B1+ inhomogenity correction of volumetric (3D) glutamate CEST via High-permittivity dielectric padding at 7T. Magn Reson Med. 88 ((6)): 2475,2022.
Cember ATJ, Deck BL, Kelkar A, Faseyitan O, Zimmerman JP, Erickson B, Elliott MA, Coslett HB, Hamilton RH, Reddy R, Madaglia JD.: Glutmate weighted Magnetic Resonance Imaging (GluCEST) Deetects Effects of Transcranial Magentic Stimulation to the Motor Cortex. Neuroimage : 2022.
Nanga RPR, Elliott MA, Swain A, Wilson N, Swago S, Soni ND, Witschey WR, Reddy R.: Identification of L-Tryptophan by down field 1HMRS: A precursor for brain NAD+ and serotonin synthesis. Magn. Reson. Med. : 2022.
Jinyuan Zhou, Moritz Zaiss, Linda Knutsson, Phillip Zhe Sun, Sung Soo Ahn, Silvio Aime, Peter Bachert, Jaishri O. Blakeley, Kejia Cai, Michael A. Chappell, Min Chen, Daniel F. Gochberg, Steffen Goerke, Hye‐Young Heo, Shanshan Jiang, Tao Jin, Seong‐Gi Kim, John Laterra, Daniel Paech, Mark D. Pagel, Ji Eun Park, Ravinder Reddy, Akihiko Sakata, Sabine Sartoretti‐Schefer, A. Dean Sherry, Seth A. Smith, Greg J. Stanisz, Pia C. Sundgren, Osamu Togao, Moriel Vandsburger, Zhibo Wen, Yin Wu, Yi Zhang, Wenzhen Zhu, Zhongliang Zu, Peter C. M. van Zijl: Review and consensus recommendations on clinical APT‐weighted imaging approaches at 3T: Application to brain tumors. Magn Reson Med. 88 ((2)): 546,2022.
Abigail T.J. Cember, Neil E. Wilson, Laurie J. Rich, Puneet Bagga, Ravi Prakash Reddy Nanga, Sophia Swago, Anshuman Swain, Deepa Thakuri, Mark Elliot, Mitchell D. Schnall, John A. Detre, Ravinder Reddy: Integrating 1H MRS and deuterium labeled glucose for mapping the dynamics of neural metabolism in humans
Neuroimage 251 : 118977,2022.
Abigail T J. Cember, Ravi Prakash Reddy Nanga, Ravinder Reddy.: Glutamate-weighted CEST (GluCEST) imaging for mapping neurometabolism: An update on the state of the art and emerging findings from in vivo applications. NMR Biomed. : 2022.
Lone SN, Bhat AA, Wani NA, Karedath T, Hashem S, Nisar S, Singh M, Bagga P, Das BC, Bedognetti D, Reddy R, Frenneaux MP, El-Rifai W, Siddiqi MA, Haris M, Macha MA: miRNAs as novel immunoregulators in cancer. Semin Cell Dev Biol. 124 : 3,2022.
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