Contact information
Research groups
Collaborators
Vishvarani Wanigasekera
MRCP, FRCA, D.Phil
Clinical Research Fellow
- Cardiothoracic Anaesthetic Fellow
My research focus is on understanding how analgesics modulate neural activity that underlies nociception and pain perception to ultimately optimize pain relief in chronic pain patients.
Chronic pain is poorly managed, lack of effective analgesics being a key reason. Even opioids, one of the most powerful analgesics that are available for treating moderate to severe pain, has a mixed success rates in treating chronic pain. The amount of analgesia patients experience is variable and inconsistent with some patients developing tolerance, heightened pain sensitivity and even dependence and misuse.
Inherent variability in subjective pain reports and the expectation driven effects on pain reports make assessment of analgesics efficacy challenging especially during analgesic drug development.
Using functional neuroimaging I study the analgesic modulation of neural mechanisms that underpin nociception, central sensitisation and pain processing. I work with a range of analgesics including the intravenous opioid remifentanil. My work is targeted at improving early analgesic drug development processes by using mechanism based disease models to demonstrate analgesic modulation of the pain and nociception related neural activity. My work also aims to understand the neurological basis of expectation related effects in a double-blind randomised randomised clinical trial setting. My interests also extend to understanding the how prior experience of aversive perceptions in patients impact therapeutic interventions.
I am also a practicing clinician at the Oxford University Hospitals Trust with clinical commitments as an intensivist in the Cardio Thoracic Critical Care Unit at the John Radcliffe Hospital. As a practicing anaesthetist, I am interested in identifying predictors of opioid analgesic efficacy and susceptibility to the development of tolerance and hyperalgesia in chronic pain patients aiming to help personalize analgesic therapy in this population of patients.
Key publications
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The Effect of Treatment Expectation on Drug Efficacy: Imaging the Analgesic Benefit of the Opioid Remifentanil
Journal article
Bingel U. et al, (2011), Science Translational Medicine, 3, 70ra14 - 70ra14
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Baseline reward circuitry activity and trait reward responsiveness predict expression of opioid analgesia in healthy subjects
Journal article
Wanigasekera V. et al, (2012), Proceedings of the National Academy of Sciences, 109, 17705 - 17710
Recent publications
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What Should Clinicians Tell Patients about Placebo and Nocebo Effects? Practical Considerations Based on Expert Consensus.
Journal article
Evers AWM. et al, (2020), Psychother Psychosom, 1 - 8
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Response to "Treating patients rather than their functional neuroimages" (Br J Anaesth 2018; 121: 969-71).
Journal article
Wanigasekera V. et al, (2019), Br J Anaesth, 123, e166 - e171
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Opioids for breathlessness: Psychological and neural factors influencing response variability
Journal article
Abdallah S. et al, (2019), European Respiratory Journal
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Central Sensitization in Knee Osteoarthritis: Relating Presurgical Brainstem Neuroimaging and Pain
DETECT
‐Based Patient Stratification to Arthroplasty Outcome
Journal article
Soni A. et al, (2019), Arthritis & Rheumatology, 71, 550 - 560
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Sertraline or placebo in chronic breathlessness? Lessons from placebo research.
Journal article
Pattinson K. and Wanigasekera V., (2019), Eur Respir J, 53
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Validation of an FMRI Based Classification Pipeline for Detecting Analgesic Efficacy from Neuroimaging Data
Poster
WANIGASEKERA V. et al, (2018)
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Disambiguating pharmacological mechanisms from placebo in neuropathic pain using functional neuroimaging
Journal article
Wanigasekera V. et al, (2018), British Journal of Anaesthesia, 120, 299 - 307
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Opioids decrease the unpleasantness of dyspnoea via actions in the medial prefrontal cortex
Conference paper
Hayen A. et al, (2017), Biological Psychology, 129, 375 - 376
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Opioid suppression of conditioned anticipatory brain responses to breathlessness
Journal article
Hayen A. et al, (2017), NeuroImage, 150, 383 - 394
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OUP accepted manuscript
Journal article
(2017), British Journal Of Anaesthesia