- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04439552
fMRI and IVCM Cornea Microscopy of CXL in Keratoconus
February 7, 2024 updated by: Eric Moulton, Boston Children's Hospital
Neuroplasticity of Pain Pathways and Corneal Afferent Regeneration Following Corneal Crosslinking (CXL) in Keratoconus
Evaluation of neuroplasticity of pain pathways and corneal afferent nerve regeneration following corneal crosslinking (CXL) in keratoconus patients using fMRI and corneal In Vivo Confocal Microscopy (IVCM).
Study Overview
Status
Recruiting
Detailed Description
Our long-term goal is to evaluate the transition from acute to chronic pain that sometimes occurs following CXL in keratoconus patients.
This study will determine whether these changes can be structurally and functionally quantified using functional neuroimaging and in vivo corneal microscopy (IVCM), and whether they can be predicted based on predisposing biological and psychological factors.
Our central hypothesis is that CXL produces acute pain through activation of trigeminal afferents, and that post-operative chronic pain outcomes are related to neuroplastic changes in trigeminal circuitry, corneal afferent regeneration, and psychological factors.
Study Type
Observational
Enrollment (Estimated)
60
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Contact
- Name: Eric A Moulton, OD PhD
- Phone Number: 617-919-6827
- Email: eric.moulton@childrens.harvard.edu
Study Contact Backup
- Name: Nicholas J Pondelis, BA
- Phone Number: 617-919-1895
- Email: nicholas.pondelis@childrens.harvard.edu
Study Locations
-
-
Massachusetts
-
Boston, Massachusetts, United States, 02115
- Recruiting
- Boston Children's Hospital
-
Contact:
- Nicholas J Pondelis, BA
- Phone Number: 617-919-1895
- Email: nicholas.pondelis@childrens.harvard.edu
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
8 years to 35 years (Child, Adult)
Accepts Healthy Volunteers
Yes
Sampling Method
Non-Probability Sample
Study Population
The population under study are patients with keratoconus who are undergoing a corneal cross-linking (CXL) procedure.
Keratoconus is an eye condition where the cornea progressively develops abnormally into a cone shape, which can lead to distorted vision and irreversible vision loss The CXL procedure is designed to restore and maintain the shape of the cornea to avoid these complications.
Description
Inclusion Criteria:
CXL Group
- Age 8-35 years
- Clinical diagnosis of keratoconus and seeking CXL treatment
- English speaking ability sufficient to comprehend consent with parental assistance
- MRI compatible
- Ability to lie still for an MRI session (60 minutes)
Control Group
- Age 8-35 years
- No diagnosis of keratoconus
- English speaking ability sufficient to comprehend consent with parental assistance
- MRI compatible
- Ability to lie still for an MRI session (60 minutes)
Exclusion Criteria (Both Groups):
- Claustrophobic
- Weight > 285 lbs (weight limit of the MRI table)
- Significant medical history, including:
Current DSM-IV-TR axis I psychiatric disorders. Chronic pain Significant head injury Seizures Brain tumor Cerebrovascular accident Neurological disease aside from migraine HIV-AIDs Prescription medication strongly implicated in causing dry eyes
- Magnetic implants or metal-containing tattoos on their chest or above
- Pregnancy
- History of contact lens wear
- Any allergic response to a numbing eyedrop in the past
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
---|
CXL group
Patients who are about to undergo a corneal cross-linking (CXL) surgery to treat keratoconus.
|
Control group
Healthy volunteers age and sex matched to the CXL group.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Neural activity related to pain.
Time Frame: 1 year
|
Pain-related brain activation measured with fMRI.
|
1 year
|
Corneal nerve morphology.
Time Frame: 1 year
|
Afferent nerve fiber morphology measured with IVCM.
|
1 year
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Eric A Moulton, OD PhD, Boston Children's Hospital
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
General Publications
- Kehlet H, Jensen TS, Woolf CJ. Persistent postsurgical pain: risk factors and prevention. Lancet. 2006 May 13;367(9522):1618-25. doi: 10.1016/S0140-6736(06)68700-X.
- Belmonte C, Acosta MC, Merayo-Lloves J, Gallar J. What Causes Eye Pain? Curr Ophthalmol Rep. 2015;3(2):111-121. doi: 10.1007/s40135-015-0073-9.
- Borsook D, Youssef AM, Simons L, Elman I, Eccleston C. When pain gets stuck: the evolution of pain chronification and treatment resistance. Pain. 2018 Dec;159(12):2421-2436. doi: 10.1097/j.pain.0000000000001401.
- Cruzat A, Qazi Y, Hamrah P. In Vivo Confocal Microscopy of Corneal Nerves in Health and Disease. Ocul Surf. 2017 Jan;15(1):15-47. doi: 10.1016/j.jtos.2016.09.004. Epub 2016 Oct 19.
- Downie LE, Naranjo Golborne C, Chen M, Ho N, Hoac C, Liyanapathirana D, Luo C, Wu RB, Chinnery HR. Recovery of the sub-basal nerve plexus and superficial nerve terminals after corneal epithelial injury in mice. Exp Eye Res. 2018 Jun;171:92-100. doi: 10.1016/j.exer.2018.03.012. Epub 2018 Mar 14.
- Ghanem VC, Ghanem RC, de Oliveira R. Postoperative pain after corneal collagen cross-linking. Cornea. 2013 Jan;32(1):20-4. doi: 10.1097/ICO.0b013e31824d6fe3.
- Hruschak V, Cochran G. Psychosocial predictors in the transition from acute to chronic pain: a systematic review. Psychol Health Med. 2018 Dec;23(10):1151-1167. doi: 10.1080/13548506.2018.1446097. Epub 2018 Feb 28.
- Hasenbring MI, Chehadi O, Titze C, Kreddig N. Fear and anxiety in the transition from acute to chronic pain: there is evidence for endurance besides avoidance. Pain Manag. 2014;4(5):363-74. doi: 10.2217/pmt.14.36.
- Kennedy RH, Bourne WM, Dyer JA. A 48-year clinical and epidemiologic study of keratoconus. Am J Ophthalmol. 1986 Mar 15;101(3):267-73. doi: 10.1016/0002-9394(86)90817-2.
- Kinard KI, Smith AG, Singleton JR, Lessard MK, Katz BJ, Warner JE, Crum AV, Mifflin MD, Brennan KC, Digre KB. Chronic migraine is associated with reduced corneal nerve fiber density and symptoms of dry eye. Headache. 2015 Apr;55(4):543-9. doi: 10.1111/head.12547. Epub 2015 Mar 31.
- Larbig W, Andoh J, Huse E, Stahl-Corino D, Montoya P, Seltzer Z, Flor H. Pre- and postoperative predictors of phantom limb pain. Neurosci Lett. 2019 May 29;702:44-50. doi: 10.1016/j.neulet.2018.11.044. Epub 2018 Nov 29.
- Moulton EA, Becerra L, Borsook D. An fMRI case report of photophobia: activation of the trigeminal nociceptive pathway. Pain. 2009 Oct;145(3):358-363. doi: 10.1016/j.pain.2009.07.018. Epub 2009 Aug 11.
- Moulton EA, Borsook D. C-Fiber Assays in the Cornea vs. Skin. Brain Sci. 2019 Nov 12;9(11):320. doi: 10.3390/brainsci9110320.
- Rosenthal P, Borsook D, Moulton EA. Oculofacial Pain: Corneal Nerve Damage Leading to Pain Beyond the Eye. Invest Ophthalmol Vis Sci. 2016 Oct 1;57(13):5285-5287. doi: 10.1167/iovs.16-20557.
- Schiffman RM, Christianson MD, Jacobsen G, Hirsch JD, Reis BL. Reliability and validity of the Ocular Surface Disease Index. Arch Ophthalmol. 2000 May;118(5):615-21. doi: 10.1001/archopht.118.5.615.
- Simone DA, Nolano M, Johnson T, Wendelschafer-Crabb G, Kennedy WR. Intradermal injection of capsaicin in humans produces degeneration and subsequent reinnervation of epidermal nerve fibers: correlation with sensory function. J Neurosci. 1998 Nov 1;18(21):8947-59. doi: 10.1523/JNEUROSCI.18-21-08947.1998.
- Sjoberg J, Kanje M. The initial period of peripheral nerve regeneration and the importance of the local environment for the conditioning lesion effect. Brain Res. 1990 Oct 8;529(1-2):79-84. doi: 10.1016/0006-8993(90)90812-p.
- Tervo K, Latvala TM, Tervo TM. Recovery of corneal innervation following photorefractive keratoablation. Arch Ophthalmol. 1994 Nov;112(11):1466-70. doi: 10.1001/archopht.1994.01090230080025.
- Pondelis NJ, Moulton EA. Supraspinal Mechanisms Underlying Ocular Pain. Front Med (Lausanne). 2022 Feb 8;8:768649. doi: 10.3389/fmed.2021.768649. eCollection 2021.
- van der Valk Bouman ES, Pump H, Borsook D, Severinsky B, Wisse RP, Saeed HN, Moulton EA. Pain mechanisms and management in corneal cross-linking: a review. BMJ Open Ophthalmol. 2021 Nov 29;6(1):e000878. doi: 10.1136/bmjophth-2021-000878. eCollection 2021.
- Dieckmann G, Borsook D, Moulton E. Neuropathic corneal pain and dry eye: a continuum of nociception. Br J Ophthalmol. 2022 Aug;106(8):1039-1043. doi: 10.1136/bjophthalmol-2020-318469. Epub 2021 Apr 30.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
October 4, 2021
Primary Completion (Estimated)
August 1, 2025
Study Completion (Estimated)
December 1, 2025
Study Registration Dates
First Submitted
June 17, 2020
First Submitted That Met QC Criteria
June 17, 2020
First Posted (Actual)
June 19, 2020
Study Record Updates
Last Update Posted (Actual)
February 8, 2024
Last Update Submitted That Met QC Criteria
February 7, 2024
Last Verified
February 1, 2024
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Pathologic Processes
- Nervous System Diseases
- Eye Diseases
- Postoperative Complications
- Pain
- Neurologic Manifestations
- Craniocerebral Trauma
- Trauma, Nervous System
- Facial Injuries
- Eye Injuries
- Pain, Postoperative
- Chronic Pain
- Wounds and Injuries
- Keratoconus
- Surgical Wound
- Intraoperative Complications
- Corneal Diseases
- Corneal Injuries
Other Study ID Numbers
- IRB-P00035185
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
YES
IPD Plan Description
All IPD that underlie results in a publication
IPD Sharing Time Frame
Starting 6 months after publication, until 5 years after.
IPD Sharing Access Criteria
Direct request to study personnel via email, letter, phone, or in-person communication.
Information will be shared with requesting parties for the purposes of expanding on this research or re-analysis.
Neuroimaging data and corneal microscopy data will be shared via secure digital electronic transfer.
IPD Sharing Supporting Information Type
- STUDY_PROTOCOL
- SAP
- ICF
- ANALYTIC_CODE
- CSR
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
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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