- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06418295
Cytokine Alterations and Chronic Post-Surgical Pain
Cytokine Alterations Associated With Persistent Post-surgical Pain and Their Regulation Through Epigenetic Changes - A Pilot Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Chronic Post-Surgical Pain (CPSP), defined by the International Association for the Study of Pain, is a clinical discomfort that lasts more than 3 months post-surgery without other causes of pain such as chronic infection or pain from a chronic condition preceding the surgery1. This condition negatively impacts health related quality of life and is associated with significant financial burden both for the patient and health care system. Patients undergoing a multitude of procedures, from amputation to hernia repair, are prone to develop CPSP with variable incidences2.
CPSP may be a result of peripheral and central sensitization triggered by the release of cytokines and chemokines following surgery due to possible alterations in genetic expression. At the cellular level, after surgical incision, tissue cells from local areas have been implicated to drive synthesis of such cytokines/chemokines leading to alterations of their serum levels, including nerve growth factors (NGF) and interleukins (IL-1β)3. Specific regulatory mechanisms leading to augmented synthesis of these cytokines in the context of CPSP remain elusive. Several regulatory mechanisms may influence production of each cytokine. One method is via epigenetic mechanisms, which are defined as the alteration of gene expression without any structural genomic alterations4,5 that may regulate cytokine production at the transcriptional and post transcriptional levels6. Among these listed epigenetic mechanisms, DNA methylation has been well studied and plays a key role in translation4. In general, hypomethylation of the promoter region leads to increased gene expression and vice versa4. In this study we wish to investigate how these mechanisms could be implicated in the expression of cytokines and chemokines in CPSP.
Patients undergoing unilateral thoracotomy for non-malignant lung resection will be included in this study. Their surgery and follow up care will proceed according to standard of care guidelines. Thoracic epidural analgesia, or patient controlled analgesia (PCA) pumps will be offered to each study participant as per standard of care. Patients' pain will be assessed preoperatively and postoperatively on days 1,2,3 and 3 months. Blood samples will also be taken during these times points and analyzed to determined the concentrations of the following cytokines, chemokines and growth factors: epidermal growth factor, eotaxin, fibroblast growth factor basic, G-CSF, GM-CSF, human growth factor, IFN-α, IFN-γ, IL-1ra, IL-1β, IL-2, IL-2r, IL-4, IL-5, IL-6, IL-7, IL-8, IL-10, IL-12 (p40/p70), IL-13, IL-15, IL-17, IP-10, MCP-1, MIG, MIP-1α, MIP-1β, RANTES, TNF-α, and VEGF. The occurence of DNA methylation at the promotor region of these targets will be assessed via polymerase chain reaction (PCR) analysis. Results of these postoperative analyses will be compared to pre-operative molecular concentrations and pain scores to determine the association between epigenetic modifications (if any) and the development of CPSP and whether these modifications are driven by DNA promotor methylation.
Study Type
Enrollment (Estimated)
Contacts and Locations
Study Contact
- Name: Abhijit Biswas
- Phone Number: 55956 5196858500
- Email: Abhijit.Biswas@lhsc.on.ca
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- 18 years of age or older
- Undergoing unilateral thoracotomy for the first time on that side
- Willing to provide informed consent for study participation.
- Patient with lung cancer
Exclusion Criteria:
- Chronic pain prior to surgery
- Pre-existing fibromyalgia
- Long-term opioid use
- Diabetes mellitus
- Pre-existing neurological disease
- Pre-existing nerve injury
- Evidence of dementia, delirium or cognitive disorder that may interfere with study participation
- Malignancy other than lung cancer
- Autoimmune disorder
- Pregnancy
- Inability to communicate in the English language (required for completion of questionnaires and provision of pain scores
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Unilateral thoracotomy for non-malignant lung resection
Unilateral thoracotomy for non-malignant lung resection to proceed according to standard of care guidelines.
|
Unilateral thoracotomy for non-malignant lung resection to proceed as per standard of care guidelines.
Thoracic epidural analgesia, or patient controlled analgesia (PCA) pumps will be offered to each study participant as per standard of care.
Pre- and post-operative (post-operative days 1, 2, 3 and 3 months) pain scores and blood samples will be collected.
Blood samples will be analyzed to determine the concentration of cytokines, chemokines, and growth factors that are potentially associated with CPSP (epidermal growth factor, eotaxin, fibroblast growth factor basic, G-CSF, GM-CSF, human growth factor, IFN-α, IFN-γ, IL-1ra, IL-1β, IL-2, IL-2r, IL-4, IL-5, IL-6, IL-7, IL-8, IL-10, IL-12 (p40/p70), IL-13, IL-15, IL-17, IP-10, MCP-1, MIG, MIP-1α, MIP-1β, RANTES, TNF-α, and VEGF).
DNA promotor methylation for these targets will also be investigated.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Identification of temporal alterations of cytokines in patients with CPSP.
Time Frame: 3 months
|
Cellular assays will be performed on blood samples obtained pre-and postoperatively to determined the level of expression of certain chemokines, cytokines, and growth factors that have been shown to be potentially related to CPSP.
Pre and postoperative results will be compared to determine the association that each may have on the development of CPSP.
|
3 months
|
Identification of specific DNA promoter methylation regulating production of specific cytokines
Time Frame: 3 months
|
Cellular assays will be performed on blood samples obtained pre-and postoperatively to determine if DNA promotor methylation is associated with changes in expression of the cytokines being investigated.
Pre and postoperative results will be compared to determine the impact that this potential epigenetic change (DNA promotor methylation) may have on the development of CPSP.
|
3 months
|
Generate initial data to determine the sample size needed to adequately power a larger trial
Time Frame: 3 months
|
As this is a pilot study, data will be analyzed to determine the sample size needed to power a larger, randomized controlled trial.
|
3 months
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Abhijit Biswas, Western University
Publications and helpful links
General Publications
- Macrae WA. Chronic post-surgical pain: 10 years on. Br J Anaesth. 2008 Jul;101(1):77-86. doi: 10.1093/bja/aen099. Epub 2008 Apr 22.
- Zhang JM, An J. Cytokines, inflammation, and pain. Int Anesthesiol Clin. 2007 Spring;45(2):27-37. doi: 10.1097/AIA.0b013e318034194e.
- Richebe P, Capdevila X, Rivat C. Persistent Postsurgical Pain: Pathophysiology and Preventative Pharmacologic Considerations. Anesthesiology. 2018 Sep;129(3):590-607. doi: 10.1097/ALN.0000000000002238.
- Macrae WA, Davies HTO, Crombie IK, Linton S, Croft P, Von Korff M, LeResche L. Chronic postsurgical pain, Epidemiology of Pain, 1999, Seattle International Association for the Study of Pain (pg. 125-42)
- Aroke EN, Joseph PV, Roy A, Overstreet DS, Tollefsbol TO, Vance DE, Goodin BR. Could epigenetics help explain racial disparities in chronic pain? J Pain Res. 2019 Feb 18;12:701-710. doi: 10.2147/JPR.S191848. eCollection 2019.
- Odell DW. Epigenetics of pain mediators. Curr Opin Anaesthesiol. 2018 Aug;31(4):402-406. doi: 10.1097/ACO.0000000000000613.
- Descalzi G, Ikegami D, Ushijima T, Nestler EJ, Zachariou V, Narita M. Epigenetic mechanisms of chronic pain. Trends Neurosci. 2015 Apr;38(4):237-46. doi: 10.1016/j.tins.2015.02.001. Epub 2015 Mar 9. Erratum In: Trends Neurosci. 2015 Sep;38(9):579.
Study record dates
Study Major Dates
Study Start (Estimated)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- CPSP Epigenetics
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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