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CompletedNCT03811145Updated Dec 12, 2019

An Investigation of Tendoncel, a Novel Topical Platelet Lysate Gel, in the Treatment of Lateral Epicondylitis

A Phase 2 interventional study of Tendoncel and Placebo control gel in Lateral Epicondylitis, sponsored by Cell Therapy Ltd.. Completed at 1 site in Greece. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2019-12-12.

Sponsored by Cell Therapy Ltd. · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Registered 4 years 8 months after the study started (first participant enrolled May 2014, registered Jan 2019).
Phase
Phase 2
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

Current treatments for lateral epicondylitis include: rest, behaviour modification and physiotherapy, anti-inflammatory medication - both steroidal and non-steroidal, and surgery. Current experimental therapies include muscle relaxants to reduce muscle tone and force on the epicondyle, laser therapy to stimulate collagen production, and blood based therapies including the injection of autologous blood and protein rich plasma.

Cell Therapy Ltd (trading as Celixir) has developed a regenerative gel that combines isolated allogeneic platelet growth factors and a cellulose-derivative gel.

Read the detailed description

Lateral epicondylitis, also called "tennis elbow" is a common condition affecting 1 to 3% of the population; most commonly individuals aged 35 to 55 years. It is frequently self limiting but can lead to refractory symptoms in a minority of cases. Pain is localised to the lateral epicondyle of the elbow at the point of insertion of the common extensor tendon. Although associated with repetitive movement of the extensor muscles of the forearm, frequently no precipitating cause can be discerned.

The term "epicondylitis" is a misnomer as histological investigations have revealed that there is only limited inflammation, and the term "epicondylosis" should be employed, due to the degenerative nature of the condition.

The condition is divided in to 4 stages, though progression may not occur through all four. Firstly, there is acute inflammation that is quick to resolve. Secondly, prolonged injury results in an increase in fibroblasts, vascular hyperplasia, disorganised collagen disposition and degeneration of the tendon. Thirdly, further accumulation of structural alterations leads to partial or complete tendon rupture. Stage 4 exhibits the same features as 2 and 3 but with the addition of calcification.

Current treatments for lateral epicondylitis include: rest, behaviour modification and physiotherapy, anti-inflammatory medication both steroidal and non-steroidal, and surgery. Current experimental therapies include muscle relaxants to reduce muscle tone and force on the epicondyle, laser therapy to stimulate collagen production, and blood based therapies including the injection of autologous blood and protein rich plasma. Trials of the latter two treatments give conflicting results due to variations in protocol and trial design.

Cell Therapy Ltd has developed a regenerative gel, Tendoncel, that combines isolated platelet growth factors and cellulose-derivative gel. Tendoncel consists of a proprietary platelet lysate formulation that is easy to apply to the skin.

02

Conditions studied

  • Lateral Epicondylitis

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Keywords

  • Topical
  • Gel
  • Platelet
  • Growth factor
  • Regenerative
03

In context

Tennis Elbow

297 studies on the registry are indexed under Tennis Elbow; 63 are open to participants now.

This study's enrollment of 30 is below the median of 50 across 263 interventional studies indexed under Tennis Elbow.

Browse Tennis Elbow studies →

Lead sponsor

Cell Therapy Ltd. is the lead sponsor of 2 studies on the registry; none are open to participants now.

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

04

Who can participate

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

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Subjects aged 18 years and over and in good general health
  • Subjects who have a diagnosis of lateral epicondylitis, Cozen's test
  • Subjects who are willing to attend all study assessments and follow-up appointments
  • Subjects who are able to understand the study, and are willing to co-operate with the study procedures and restrictions

Exclusion criteria

Exclusion Criteria:

  • Subjects have been receiving additional concurrent treatment (e.g. surgical or steroid injection) for lateral epicondylitis.
  • Subjects who have medial epicondylitis or another condition of the elbow (test side only)
  • Subjects who have participated in any clinical study during the previous 30 days of initiation of this study
  • Subjects with a history of alcohol, substance or drug abuse in the previous 12 months
  • Subjects with any significant concurrent illness
  • Subjects with a heart pacemaker
  • Subjects with diabetes either type I or type II (owing to possible poor wound healing)
  • Subjects that have undergone surgery in the past 3 months
  • Subjects with any active or significant history of skin disorders at the treatment area(s) e.g. hypo pigmentation (vitiligo)
  • Subjects with any inflammatory skin condition (eczema, psoriasis, herpes simplex/complex)
  • Subjects with a history (or family history) of skin cancer, skin tumours or any other malignant disease
  • Subjects with any irritation, tattoo's, piercings, scars, birthmarks, or heavy presence of freckles at the treatment site(s)
  • Subjects currently taking anti-histamine or steroid medication
  • Subject who due to impaired mobility would not be able to undertake independent care
  • Subjects who are pregnant or who are breast feeding.
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Care provider, Investigator)
Enrollment
30 participants (actual)

Study arms

  • Experimental
    Tendoncel

    Topically applied experimental gel - Tendoncel. 80ul applied once a day for 21 consecutive days.

    Biological: Tendoncel

  • Placebo comparator
    Placebo control gel

    Placebo control gel. Similar to Tendoncel but without platelet derived small molecules and growth factors. 80ul applied once a day for 21 consecutive days.

    Other: Placebo control gel

Interventions

  • BiologicalTendoncel

    Platelet lysate gel

  • OtherPlacebo control gel

    Placebo control gel

06

What researchers measure

Primary outcomes

  1. Patient-Rated Tennis Elbow Evaluation (PRTEE) questionnaire

    15 question questionnaire measuring pain and function. Total scores from 15 questions compared - pain and function combined. Scale: 10 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: Baseline

  2. Patient-Rated Tennis Elbow Evaluation (PRTEE) questionnaire

    15 question questionnaire measuring pain and function. Total scores from 15 questions compared - pain and function combined. Scale: 10 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: Day 23 (end of treatment).

  3. Patient-Rated Tennis Elbow Evaluation (PRTEE) questionnaire

    15 question questionnaire measuring pain and function. Total scores from 15 questions compared - pain and function combined. Scale: 10 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: 4 weeks follow up

  4. Patient-Rated Tennis Elbow Evaluation (PRTEE) questionnaire

    15 question questionnaire measuring pain and function. Total scores from 15 questions compared - pain and function combined. Scale: 10 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: 6 weeks follow up.

  5. Patient-Rated Tennis Elbow Evaluation (PRTEE) questionnaire

    15 question questionnaire measuring pain and function. Total scores from 15 questions compared - pain and function combined. Scale: 10 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: 3 months follow up.

  6. Patient-Rated Tennis Elbow Evaluation (PRTEE) questionnaire

    15 question questionnaire measuring pain and function. Total scores from 15 questions compared - pain and function combined. Scale: 10 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: Mean of 47 weeks follow up.

  7. Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire

    30 question questionnaire measuring disabilities of the upper limb. Scale from 0 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: Baseline

  8. Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire

    30 question questionnaire measuring disabilities of the upper limb. Scale from 0 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: Day 23.

  9. Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire

    30 question questionnaire measuring disabilities of the upper limb. Scale from 0 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: 4 week follow up.

  10. Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire

    30 question questionnaire measuring disabilities of the upper limb. Scale from 0 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: 6 week follow up.

  11. Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire

    30 question questionnaire measuring disabilities of the upper limb. Scale from 0 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: 3 months follow up

  12. Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire

    30 question questionnaire measuring disabilities of the upper limb. Scale from 0 to 100 (best to worst). Difference between test and control scores compared.

    Time frame: Mean of 47 weeks follow up.

  13. Pain free grip strength

    Measured using a dynamometer. Results compared between test and control elbows, and between study and contralateral elbow (internal control).

    Time frame: Baseline

  14. Pain free grip strength

    Measured using a dynamometer. Results compared between test and control elbows, and between study and contralateral elbow (internal control).

    Time frame: Day 23

  15. Pain free grip strength

    Measured using a dynamometer. Results compared between test and control elbows, and between study and contralateral elbow (internal control).

    Time frame: Mean of 47 weeks follow up (final follow up).

Secondary outcomes

  1. Safety - Number of participants in each group with adverse events.

    Measured by participant questionnaire. Comparison of the number of participants in each group with cutaneous events - "redness", "rash", "swelling" or changes at gel site. Classed as none, mild, moderate or severe. Plus any other event mentioned by the participants.

    Time frame: Day 3 (1st treatment visit), day 7, day 14, day 21, day 23 (end of treatment). Follow ups: 4 weeks, 6 weeks, 3 months and mean of 47 weeks.

  2. Safety: Immune response - blood IgE levels. Difference between test and control groups.

    Measurement of blood IgE levels. Test and control averages compared. Normal is \<100IU/mL.

    Time frame: Baseline

  3. Safety: Immune response - blood IgE levels. Difference between test and control groups.

    Measurement of blood IgE levels. Test and control averages compared. Normal is \<100IU/mL.

    Time frame: Day 7

  4. Safety: Immune response - blood IgE levels. Difference between test and control groups.

    Measurement of blood IgE levels. Test and control averages compared. Normal is \<100IU/mL.

    Time frame: Day 23

  5. Safety: Immune response - blood IgE levels. Number of participants in each group with a normal baseline reading and a subsequently elevated reading.

    Measurement of blood IgE levels. Comparison of the number of participants in each group, test and control, with a normal baseline reading of blood IgE and a subsequently elevated IgE reading. Normal is \<100IU/mL.

    Time frame: Baseline, day 7 and day 23.

07

Study locations

1 site
  • Orthopaedic Clinic of Aristotle University of Thessaloniki, General Hospital of Papanikolaou
    Thessaloniki, 57010, Greece
08

References and documents

Publications

  • Ahmad Z, Siddiqui N, Malik SS, Abdus-Samee M, Tytherleigh-Strong G, Rushton N. Lateral epicondylitis: a review of pathology and management. Bone Joint J. 2013 Sep;95-B(9):1158-64. doi: 10.1302/0301-620X.95B9.29285. PubMed 23997125 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 12, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03811145
Lead sponsor
Cell Therapy Ltd.
Collaborators
George Papanicolaou Hospital
Responsible party
Sponsor
First posted
Jan 22, 2019
Start date
May 2014
Primary completion
Nov 2015
Completion
Nov 2015
Last update
Dec 12, 2019

Study contacts

Givissis Panagiotis, MD
principal investigator · Aristotle University of Thessaloniki, General Hospital of Papanikolaou

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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