Sporadic Inclusion Body Myositis Natural History Study (INSPIRE-IBM)
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ClinicalTrials.gov Identifier: NCT05046821 |
Recruitment Status :
Recruiting
First Posted : September 16, 2021
Last Update Posted : August 7, 2023
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Condition or disease |
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Sporadic Inclusion Body Myositis Inclusion Body Myositis |
This is a prospective natural history study on patients with clinically defined sIBM. Participants will be assessed every 6 months over two years (five visits total). We will include 150 participants with sporadic IBM, diagnosed according to established criteria. Participants will require an routine serum sample via blood draw to evaluate for NT5c1A antibody status. This testing will be performed at Washington University School of Medicine in the Neuromuscular Laboratory. Investigators will be blinded to antibody status. A subset of participants (40) will undergo a muscle biopsy at the Baseline visit.
Aim 1. To determine for the first time whether NT5c1A antibodies mediate disease progression over a two-year interval in patients with sIBM.
We will perform a prospective, non-interventional, observational study on patients with sIBM with follow up and evaluations every 6 months over a two-year time frame. Primary analyses are: 1) the rates of disease progression and severity as measured by rates of decline in IBM Functional Rating Scale (IBMFRS) score and Timed Get Up and Go (TUG); 2) the presence or absence of serum antibodies to NT5c1A; and 3) the presence and frequency of variant T-cells in the serum and skeletal muscle.
Aim 2. To perform a detailed morphological, histochemical and immunohistochemical analysis of fresh muscle biopsy specimens obtained from a subset of patients with sIBM.
Aim 3. To characterize the distribution of "immunosenescent" lymphocytes in circulating blood from patients with sIBM.
Aim 4. To quantify the decline in the respiratory function of sIBM patients.
Study Type : | Observational |
Estimated Enrollment : | 150 participants |
Observational Model: | Case-Only |
Time Perspective: | Prospective |
Official Title: | Influence of NT5c1A Antibodies on Disease Progression, Clinical Phenotype and Blood and Muscle Biomarkers in Sporadic Inclusion Body Myositis - A Prospective Evaluation (INSPIRE-IBM Study) |
Actual Study Start Date : | October 11, 2021 |
Estimated Primary Completion Date : | November 15, 2024 |
Estimated Study Completion Date : | November 15, 2024 |

- Inclusion Body Myositis Functional Rating Scale (IBMFRS) [ Time Frame: Change from Baseline to Month 24 ]The IBMFRS is a 10 item questionnaire. Scores for each item range from 0 to 4. There is a total maximum score of 40 and minimum score of 0. The higher the score the better functional status of the person.
- Timed Up and Go (TUG) [ Time Frame: Change from Baseline to Month 24 ]Stand up from a chair, walk 3 meters, sit back down in chair
- Frequency of immunophenotypic abnormalities in blood and muscle [ Time Frame: Change from Baseline to Month 24 ]Laboratory assessment
- Forced Vital Capacity (FVC) (sitting) [ Time Frame: Change from Baseline to Month 24 ]breathing test
- Manual Muscle Testing [ Time Frame: Change from Baseline to Month 24 ]muscle strength testing
- Hand Held Dynamometry [ Time Frame: Change from Baseline to Month 24 ]muscle strength testing
- Sydney Swallow Questionnaire [ Time Frame: Change from Baseline to Month 24 ]swallow ability questionnaire
- EAT-10 Questionnaire [ Time Frame: Change from Baseline to Month 24 ]swallow ability questionnaire
- NIH PROMIS questionnaires [ Time Frame: Change from Baseline to Month 24 ]quality of life questionnaires
- Forced Vital Capacity (supine) [ Time Frame: Change from Baseline to Month 24 ]breathing test done while lying down
- Maximum Inspiratory Pressure/Maximum Expiratory Pressure [ Time Frame: Change from Baseline to Month 24 ]breathing tests
- sporadic inclusion body myositis physical functioning assessment (sIFA) [ Time Frame: Change from Baseline to Month 24 ]functional ability questionnaire
Biospecimen Retention: Samples With DNA

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Ages Eligible for Study: | 40 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Sampling Method: | Probability Sample |
Inclusion Criteria:
- Ages 40 years and older
- Fulfills ENMC 2011 criteria of clinically definite or probable sporadic Inclusion body myositis (sIBM)
- Disease onset is within the past 10 years of the time of Baseline visit
- Able to participate and comply with study related procedures
- Able to provide written consent
Exclusion Criteria:
- Current or very recent use (within last 6 months of the Baseline visit) of immunomodulation or immunosuppression therapy.
- Current or very recent use (within last 90 days of the Baseline visit) of an investigational medication or therapy.
- Co-existing significant medical or surgical conditions that, in the opinion of the investigator, will influence study participation or alter natural history.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05046821
Contact: Marie Wencel, BS | (714) 456-2525 | mwencel@hs.uci.edu |
United States, California | |
University of California, Los Angeles | Recruiting |
Los Angeles, California, United States, 90095 | |
Contact: Denisse Velazquez denissevelazquez@mednet.ucla.edu | |
Principal Investigator: Perry Shieh, MD, PhD | |
University of California, Irvine | Recruiting |
Orange, California, United States, 92868 | |
Contact: Marie Wencel, BS 714-456-2525 mwencel@hs.uci.edu | |
Principal Investigator: Namita Goyal, MD | |
United States, Colorado | |
University of Colorado | Recruiting |
Aurora, Colorado, United States, 80045 | |
Contact: Karen Parada KAREN.PARADA@CUANSCHUTZ.EDU | |
Principal Investigator: Matthew Wicklund, MD | |
United States, Florida | |
University of Miami | Recruiting |
Miami, Florida, United States, 33136 | |
Contact: Patricia Gonzalez pxg509@med.miami.edu | |
Principal Investigator: Olimpia Carbunar, MD | |
United States, Kansas | |
Kansas University Medical Center | Recruiting |
Fairway, Kansas, United States, 66205 | |
Contact: Lillian Saavedra 913-945-9937 lsaavedra2@kumc.edu | |
Principal Investigator: Mazen Dimachkie, MD | |
United States, Maryland | |
Johns Hopkins University | Recruiting |
Baltimore, Maryland, United States, 21287 | |
Contact: Estelle Yoo 410-614-4188 eyoo6@jhmi.edu | |
Principal Investigator: Thomas E Lloyd, MD, PhD | |
United States, Massachusetts | |
Brigham and Women's Hospital | Recruiting |
Boston, Massachusetts, United States, 02115 | |
Contact: Mary Kate Gannon 508-808-2510 MGANNON2@PARTNERS.ORG.edu | |
Principal Investigator: Anthony A Amato, MD | |
United States, Missouri | |
Washington University in St. Louis | Active, not recruiting |
Saint Louis, Missouri, United States, 63110 | |
United States, Ohio | |
Ohio State University | Recruiting |
Columbus, Ohio, United States, 43221 | |
Contact: Kaci Eubanks 614-366-3427 Kaci.Eubanks@osumc.edu | |
Principal Investigator: Miriam Freimer, MD | |
United States, Oregon | |
Oregon Health & Science University | Recruiting |
Portland, Oregon, United States, 97239 | |
Contact: Sonya Boyd 503-494-7394 boydso@ohsu.edu | |
Principal Investigator: Nizar Chahin, MD | |
United States, Pennsylvania | |
University of Pennsylvania | Recruiting |
Philadelphia, Pennsylvania, United States, 19104 | |
Contact: Daniel Corr Moulton 267-593-9459 daniel.corr@pennmedicine.upenn.edu | |
Principal Investigator: Colin Quinn, MD | |
United States, Texas | |
Nerve and Muscle Center of Texas | Active, not recruiting |
Houston, Texas, United States, 77030 | |
United States, Washington | |
University of Washington | Recruiting |
Seattle, Washington, United States, 98195 | |
Contact: Mike Willis 206-685-2028 mwillis5@uw.edu | |
Principal Investigator: Leo H Wang, MD, PhD |
Principal Investigator: | Tahseen Mozaffar, MD FAAN, FANA | University of California, Irvine |
Responsible Party: | University of California, Irvine |
ClinicalTrials.gov Identifier: | NCT05046821 |
Other Study ID Numbers: |
HS# 2021-6779 R01AR078340-01 ( U.S. NIH Grant/Contract ) |
First Posted: | September 16, 2021 Key Record Dates |
Last Update Posted: | August 7, 2023 |
Last Verified: | August 2023 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Undecided |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Myositis Myositis, Inclusion Body Muscular Diseases |
Musculoskeletal Diseases Neuromuscular Diseases Nervous System Diseases |