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CompletedNCT00875537BMS17Updated Mar 14, 2017

Neurogenic Mechanisms in Burning Mouth Syndrome

An interventional study of Capsaicin oral gel 0.025% and Capsaicin oral gel 0.01% in Burning Mouth Syndrome, sponsored by University of Copenhagen. Completed at 1 site in Denmark. Open to female participants aged 18 Years to 70 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2017-03-14.

Sponsored by University of Copenhagen · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
22
Allocation
Randomized
Ages
18 Years to 70 Years
Sex
Female
01

Study summary

Burning mouth syndrome (BMS) is characterized by a bilateral burning sensation in the anterior tongue, hard palate and lips in the absence of any clinical or laboratory findings. The term syndrome implicates the simultaneous presence of oral dryness (xerostomia) and altered taste (dysgeusia) in addition to the burning sensation in the oral mucosa. BMS is most often seen in women and is more frequent during menopause. The etiology and pathogenesis are still unclear but recent studies suggest that BMS is a neuropathic pain condition.

The objectives of the study are:

  • To clarify potential neurogenic mechanisms behind BMS using immunohistochemistry (IH) to characterize the localization and distribution of peripheral nerve fibres, neuropeptides like substance P, calcitonin gene-related peptide, nerve growth factor, nerve growth factor receptor, PGP 9.5 neuronal marker and TRPV1 as well as inflammatory/structural changes.
  • To perform a randomized double blind cross-over intervention study to examine the efficacy and safety of topical application of capsaicin oral gel (on the tongue) to relieve the burning sensation in patients with BMS.
Read the detailed description

Data which support the hypothesis that BMS is a neuropathic pain condition include amongst others a recent clinically controlled study that has shown up-regulation of TRPV1-positive nerve fibres in tongue mucosa in patients with BMS. The vanilloid receptor-1 (TRPV1) is a voltage-dependent cation channel expressed by the unmyelinated C-nociceptive nerve fibres and the receptor may be activated by capsaicin (from chili peppers), heat and H+. Capsaicin binds to the TRPV1 receptor causing depolarization of the C-nociceptors. Prolonged activation of these neurons by capsaicin depletes pre-synaptic substance P and makes them unable to report pain.

02

Conditions studied

  • Burning Mouth Syndrome

Keywords

  • Burning mouth syndrome
  • neuropathy
  • inflammation
  • tongue mucosa
  • tongue innervation
  • dysgeusia
03

In context

Burning Mouth Syndrome

44 studies on the registry are indexed under Burning Mouth Syndrome; 6 are open to participants now.

This study's enrollment of 22 is below the median of 42 across 35 interventional studies indexed under Burning Mouth Syndrome.

Browse Burning Mouth Syndrome studies →

Lead sponsor

University of Copenhagen is the lead sponsor of 450 studies on the registry; 61 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 70 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes

Inclusion criteria

  • non-smoking female patients with burning mouth syndrome (n=26)
  • healthy aged-matched control group (n=10)

Exclusion criteria

Exclusion Criteria:

  • pregnancy and lactation (inclusion requires negative pregnancy test)
  • women who do not use safe anticonception
  • patients with know allergy/hypersensitivity to capsicum and other capsaicinoid-containing products
  • Active infection which requires antibiotic treatment
  • use of mouthrinse. The use of these is stopped 14 days before inclusion
  • patients who are able to give informed consent due to physical or mental disabilities
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
22 participants (actual)

Study arms

  • Active comparator
    Capsaicin oral gel 0.01%

    Other: Capsaicin oral gel 0.01%

  • Active comparator
    Capsaicin oral gel 0.025%

    Other: Capsaicin oral gel 0.025%

Interventions

  • OtherCapsaicin oral gel 0.025%

    Application 3 times daily for 14 days on the tongue, followed by 14 days wash-out

    Also known as: Capsicum, extract from chilipepper

  • OtherCapsaicin oral gel 0.01%

    Application 3 times daily for 14 days on the tongue, followed by 14 days wash-out

    Also known as: Capsicum, extract from chilipepper

06

What researchers measure

Primary outcomes

  1. Primary outcome: To evaluate the efficacy and safety of topical application of capsaicin oral gel (using to different concentrations) to relieve the burning sensation in patients with BMS and alleviate BMS related symptoms.

    Time frame: 6 months

Secondary outcomes

  1. To characterize the localization and distribution of peripheral nerve fibres, neuropeptides like substance P, calcitonin gene-related peptide, NGF, NGF-R, PGP 9.5 neuronal marker and TRPV1 as well as inflammatory/structural changes.

    Time frame: 6 months

07

Study locations

1 site
  • Department of Odontology, Section of Oral Medicine, Clinical Oral Physiology, Oral Pathology & Anatomy
    Copenhagen, 2200, Denmark
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 14, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00875537
Lead sponsor
University of Copenhagen
Responsible party
Anne Marie Lynge Pedersen (Associate Professor, PhD, DDS, University of Copenhagen) — Principal investigator
First posted
Apr 3, 2009
Start date
Jan 2009
Primary completion
Apr 2010
Completion
Jun 2010
Last update
Mar 14, 2017

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Mar 2017. You cannot join it, but the record below documents what was studied.

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