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RecruitingNCT05989763TEA in SScUpdated Jun 26, 2025

Interrogating the Pathophysiological Mechanisms of Constipation in Patients With Systemic Sclerosis

An interventional study of Transcutaneous Electrical Acustimulation (TEA) and Sham-TEA in Systemic Sclerosis, Constipation and Gastrointestinal Motility Disorder, sponsored by The University of Texas Health Science Center, Houston. Recruiting at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-06-26.

Sponsored by The University of Texas Health Science Center, Houston · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Started Feb 2024; still recruiting 2 years 7 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
60
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to determine whether transcutaneous electrical acustimulation (TEA) alters systemic sclerosis (SSc)-related colonic and anorectal physiology by enhancing autonomic nervous system (ANS) function. The study will examine the effects of TEA on slow colonic transit (SCT) and rectal hyposensitivity (RH), to examine whether TEA improves autonomic dysfunction and modulates inflammatory pathways.

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Conditions studied

  • Systemic Sclerosis
  • Constipation
  • Gastrointestinal Motility Disorder
  • Autonomic Dysfunction
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In context

Scleroderma, Systemic

688 studies on the registry are indexed under Scleroderma, Systemic; 223 are open to participants now.

This study's planned enrollment of 60 is above the median of 34 across 493 interventional studies indexed under Scleroderma, Systemic.

Browse Scleroderma, Systemic studies →

Lead sponsor

The University of Texas Health Science Center, Houston is the lead sponsor of 880 studies on the registry; 209 are open to participants now.

Of its 170 completed or terminated interventional studies of FDA-regulated products, 140 (82%) have results posted.

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

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Patients with SSc-constipation from Aim 1 of the study
  • Patients with SCT (>20% radiopaque marks left in the colon 5 days (120 hours) after swallowing the Sitzmark capsule or patients with RH (defined in Aim 1)
  • Patients not yet on therapy for constipation or patients who continue to experience constipation while on stable therapy for one month prior to TEA.

Exclusion criteria

Exclusion Criteria

-Patients with symptoms of both diarrhea and constipation but not predominantly symptoms of constipation.

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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
60 participants (estimated)

Study arms

  • Experimental
    Transcutaneous Electrical Acustimulation (TEA)

    Device: Transcutaneous Electrical Acustimulation (TEA)

  • Sham comparator
    Sham-TEA

    Device: Sham-TEA

Interventions

  • DeviceTranscutaneous Electrical Acustimulation (TEA)

    TEA will then be administrated for 1 hour twice daily for a period of 4 weeks

  • DeviceSham-TEA

    Sham TEA will then be administrated for 1 hour twice daily for a period of 4 weeks

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What researchers measure

Primary outcomes

  1. Change in slow colonic transit (SCT)

    slow colonic transit (SCT) is defined by more than 5 (20%) of Sitz markers retained 5 days after ingestion

    Time frame: baseline, week 4 (visit 2)

Secondary outcomes

  1. Change in rectal hyposensitivity as assessed by the anorectal manometry

    Time frame: baseline, week 4 (visit 2)

  2. Change in autonomic dysfunction as assessed by the Heart rate variability (HRV) measures

    Time frame: baseline, week 4 (visit 2)

  3. Change in autonomic dysfunction as assessed by the COMPASS-31 measures

    This is a 31 item questionnaire and scores range from 0-100 a higher score indicating more severe autonomic dysfunction

    Time frame: baseline, week 4 (visit 2)

  4. Change in inflammatory cytokines (IL-6, Tumour Necrosis Factor alpha (TNF-alpha) ),

    Time frame: baseline, week 4 (visit 2)

07

Study locations

1 of 1 sites recruiting
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 26, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT05989763
Lead sponsor
The University of Texas Health Science Center, Houston
Collaborators
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
Responsible party
Zsuzsanna Hortobagyi Mcmahan (Associate Professor, The University of Texas Health Science Center, Houston) — Principal investigator
First posted
Aug 14, 2023
Start date
Feb 17, 2024
Primary completion
Aug 14, 2028 (estimated)
Completion
Sep 1, 2029 (estimated)
Last update
Jun 26, 2025

Study contacts

Zsuzsanna H McMahan, MD, MHS (M-PI)
Contact
Zsuzsanna.H.McMahan@uth.tmc.edu
7135007531
Sharvari R Kamat
Contact
Sharvari.R.Kamat@uth.tmc.edu
713-500-6898
Zsuzsanna H McMahan, MD, MHS (M-PI)
principal investigator · The University of Texas Health Science Center, Houston

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

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