Immunophenotyping From Blood of Patients Suffering From Chronic Degenerating Joint Diseases and Receiving LDRT

  • End date
    Dec 4, 2026
  • participants needed
  • sponsor
    University of Erlangen-Nürnberg Medical School
Updated on 4 May 2021


Patients suffering from chronic degenerating diseases are often treated by a plethora of NSAIDs, DMARDs, Biologicals, as well as combinations of these therapeutics. However, many patients are refractory to this treatment and suffer from chronic pain over years, leading to a worsening of the quality of live. The mobilization of these patients is one main goal in the therapy of these chronic and inflammatory diseases. Low dose radiation therapy (LDRT) is applied since more than one century for the local treatment of chronic degenerating joint diseases. The success of the treatment was described by many retrospective as well as pattern of care studies, respectively.

Local (only at the painful joint) low dose irradiation of the chronic patients results in most patients in a significantly reduced pain, not only direct after the therapy, but also lasting for more than 12 month in many cases. The patients experience enhanced mobility and increased quality of life. The molecular and cellular processes leading to the pain reduction are just fragmentarily analyzed. Our group revealed that macrophages are key players in radiation-induced immune modulation. Inflammatory macrophages exposed to low doses of radiation showed a reduced inflammatory capacity and attenuated an inflammatory microenvironment. Besides macrophages further immune cells are most likely involved in reduction of inflammation following LD-RT, as in vitro already shown for neutrophils.

The IMMO-LDRT01 study aims for the first time to analyze in detail the immune status of patients suffering from inflammatory, chronic joint diseases before, during and after LD-RT in a longitudinal manner. The multi-color flow cytometry-based assay will allow determining over 30 immune cell subsets and additionally their activation status. Further, biodosimetry will be performed with the whole-blood samples to get hints about dose that the immune cells are exposed to. This will be performed with national and international co-operation partners.

The IMMO-LDRT01 study is a prospective and observational study not influencing the standard therapeutic scheme and will provide hints how the LDRT affects besides local cells in the irradiated area also the systemic inflammatory response.

Condition Chronic Inflammatory Disease, Chronic Inflammatory Disorder
Treatment Blood Draw and Questionaire
Clinical Study IdentifierNCT02653079
SponsorUniversity of Erlangen-Nürnberg Medical School
Last Modified on4 May 2021


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Inclusion Criteria

Is your age greater than or equal to 18 yrs?
Gender: Male or Female
Do you have Chronic Inflammatory Disorder?
Do you have any of these conditions: Chronic Inflammatory Disorder or Chronic Inflammatory Disease?
Do you have any of these conditions: Chronic Inflammatory Disorder or Chronic Inflammatory Disease?
Do you have any of these conditions: Chronic Inflammatory Disease or Chronic Inflammatory Disorder?
Patients suffering and diagnosed for
painful shoulder syndrome (periarthritis humeroscapularis)
painful elbow syndrome (Epicondylopathia humeri)
benign achillodynia
benign calcaneodynia
arthosis (finger- , rhiz-, gon-, and anklearthrosis
arthritis (gon- and anklearthrosis)
Planned local low dose radiation therapy (LDRT) at the Department of Radiation Oncology, Universittsklinikum Erlangen
Age at least 18 years

Exclusion Criteria

patients who are suffering or had suffered from any malignant diseases
fertile patients who refuse effective contraception during study treatment
persistent drug and/or alcohol abuse
patients not able or willing to behave according to study protocol
patients in care
patients that are not able to speak German
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