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Not yet recruitingNCT06326203Updated May 6, 2026

Cell Therapy for Lower Limb Ulcers in Patients With Critical Limb Ischemia

A Phase 1/2 interventional study of CELULAS TRONCO and CONVENTIONAL DRESSING in Peripheral Arterial Disease and Leg Ulcer, sponsored by UPECLIN HC FM Botucatu Unesp. Not yet recruiting. Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2026-05-06.

Sponsored by UPECLIN HC FM Botucatu Unesp · Phase 1/2, Interventional, and Treatment

Phase
Phase 1/2
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years to 90 Years
Sex
All
01

Study summary

Peripheral arterial disease (PAD) can progress to critical limb ischemia (CLI) of the affected lower limb, characterized by pain at rest, ulcerations or gangrene, with a high risk of amputation. In this phase, the best treatment is arterial limb revascularization, but this is not always possible or even effective for promoting pain relief, healing of ulcers or preventing amputations, in addition to the high socioeconomic cost caused by the disease. Recent advances in cell therapy represent a promising supporting alternative for the treatment of PAD in cases where conventional alternatives have run out. Objective: To evaluate the safety and efficacy of cell therapy with expanded autologous mesenchymal stem cells in the treatment of patients with PAD with CLI and chronic arterial ulcers. Methods: An open randomized clinical study will be performed with 2 groups of 20 patients with CLI: in group 1, a fragment of abdominal fat tissue (10g) will be collected to obtain mesenchymal stem cells, which will be expanded and applied using subcutaneous perilesional injection in the affected lower limb, in addition to the application in the form of a personalized curative biological on the wounds. Group 2 will receive conventional treatment with a Hydrogel dressing with essential fatty acids. Periodic clinical evaluations, complementary exams and photographic record will be carried out. The main outcome of effectiveness will be partial or total wound healing. Safety outcomes will be monitored for infections, gangrene, amputations and deaths. Participants will be monitored for 120 days. Major amputation cases will not be included. An independent external evaluator and blind to the groups will evaluate the results. It is an innovative procedure with high impact and financial return for SUS, in view of the high prevalence of the disease and the high socioeconomic impact of the disease when it progresses to limb amputation.

02

Conditions studied

  • Peripheral Arterial Disease
  • Leg Ulcer
03

In context

Peripheral Arterial Disease

1,377 studies on the registry are indexed under Peripheral Arterial Disease; 275 are open to participants now.

This study's planned enrollment of 40 is below the median of 70 across 927 interventional studies indexed under Peripheral Arterial Disease.

Browse Peripheral Arterial Disease studies →

Lead sponsor

UPECLIN HC FM Botucatu Unesp is the lead sponsor of 65 studies on the registry; 4 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 90 Years
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

  • Absence of distal pulses in the leg (anterior tibial and posterior tibial) and presence or absence of popliteal pulse.
  • Peripheral Arterial Disease (PAD).
  • Having foot or leg ulcer(s) (distal third) with a minimum area of 1cm2 and a maximum of 3 ulcers totaling up to 20cm2 in the lower limb.
  • Having previously received conventional dressing treatment for ulcer indicating no improvement over a minimum period of 3 weeks (antibiotic therapy - if necessary - local care such as mechanical, surgical or chemical debridements - if necessary, dressings).
  • PAD with IC classified as Fontaine IV and Rutherford 5.
  • Having Ankle Brachial Index (ABI) \<0.9 in infragenicular arteries (anterior tibial, posterior tibial, and fibular) or ABI>1.3 in one or more infragenicular arteries when suffering from chronic DMT2 (disease duration > 5 years) not subjected to revascularization treatment or subjected to partial revascularization treatment or treatment failure (stenosis or occlusion) in the last 12 months.
  • Inability to revascularize the affected limb (do not have visible infragenicular arteries for surgical approach) and or incomplete revascularization of this limb (undergone endovascular and or surgical treatment that was not able to restore infragenicular pulses) and defined by the doctor that the best available treatment from the surgical vascular point of view has already been performed and was not successful in promoting ulcer healing.
  • Drug treatment for PAD and for comorbidities.
  • Availability to attend medical appointments.

Exclusion criteria

Exclusion criteria:

  • Being pregnant or in the puerperium.
  • Having a healed ulcer during the screening period.
  • Having signs of systemic infection or active infection in the arterial ulcer or infection of surgical prostheses (bypass, pins, screws). They may be eligible again if they have been successfully treated with antibiotics and the infectious focus has been removed.
  • Having an ulcer with devitalized tissue (necrosis). They may be eligible again if they have undergone successful surgical debridement or minor amputations (amputation of toes or limited to the forefoot).
  • Having neoplasia and/or being in chemotherapy or radiotherapy treatment or in remission for less than 6 months.
  • Being on colchicine or immunomodulators.
  • Having infectious diseases such as (HIV), and C viruses, Human T-cell Lymphotropic Virus (HTLV); due to the risk of contagion during the manipulation of biological material in the laboratory.
  • Having undergone amputation at the level of the leg or thigh in the limb intended to be studied.
  • Having COVID-19, diagnosed less than 4 weeks ago.
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
40 participants (estimated)

Study arms

  • Experimental
    EMBRYONIC STEM CELLS

    Cellular Therapy Treatment: The treatment will consist of \*\*20 participants (n=20) who will receive treatment with expanded mesenchymal stem cells (MSCs). The patient will undergo a surgical debridement procedure for the ulcer to be in its optimal condition (Visit 1). Subsequently, the patient will receive MSC application via perilesional injections and a biocovering produced by the study team, also containing the same cells (single session - the MSC-containing dressing will remain in contact with the ulcer for 7 days). After removal of the biological dressing, the ulcer will receive local care with a topical hydrogel dressing, dry gauze, and a crepe bandage, with a minimum of one change per day.

    Biological: CELULAS TRONCO

  • Active comparator
    CONVENTIONAL DRESSING (Control Group)

    The control group will consist of 20 participants (n=20) who will receive local care for the ulcer. The patient will undergo a surgical debridement procedure for the ulcer to be in its optimal condition (Visit 1). Subsequently, the patient will receive the application of a conventional dressing with Hydrogel, dry gauze, and a crepe bandage. The patient will be instructed to change the dressing at least once a day.

    Device: CONVENTIONAL DRESSING

Interventions

  • BiologicalCELULAS TRONCO

    Cellular Therapy Treatment: The treatment will consist of \*\*20 participants (n=20) who will receive treatment with expanded mesenchymal stem cells (MSCs). The patient will undergo a surgical debridement procedure for the ulcer to be in its optimal condition (Visit 1). Subsequently, the patient will receive MSC application via perilesional injections and a biocovering produced by the study team, also containing the same cells (single session - the MSC-containing dressing will remain in contact with the ulcer for 7 days). After removal of the biological dressing, the ulcer will receive local care with a topical hydrogel dressing, dry gauze, and a crepe bandage, with a minimum of one change per day.

  • DeviceCONVENTIONAL DRESSING

    The control group will consist of 20 participants (n=20) who will receive local care for the ulcer. The patient will undergo a surgical debridement procedure for the ulcer to be in its optimal condition (Visit 1). Subsequently, the patient will receive the application of a conventional dressing with Hydrogel, dry gauze, and a crepe bandage. The patient will be instructed to change the dressing at least once a day.

06

What researchers measure

Primary outcomes

  1. Major Amputation

    Defined by total number of patients subjected to amputation at the knee or tight level.

    Time frame: 120 days

  2. Ulcer Healing

    Defined by total or partial epithelization of the ulcer as measured in total square centimeters.

    Time frame: 7, 30, 60, 90 and 120 days

07

Study locations

No study locations are listed for this record.

08

References and documents

Publications

  • Oliveira Filho FJ, Rodrigues LDS, Amaral SMBD, Mellucci Filho PL, Medolago NB, de Carvalho Bovolato AL, Alvarado RC, Bertanha M. Study protocol for a randomized clinical trial evaluating the safety and efficacy of autologous adipose-derived stem cell therapy for ulcers in patients with critical limb ischemia. PLoS One. 2025 Apr 9;20(4):e0318922. doi: 10.1371/journal.pone.0318922. eCollection 2025. PubMed 40202953 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Jun 2026; primary completion for Mar 2028, 21 months later.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 16, 2024
First posted
Mar 22, 2024
StartEst.
Jun 1, 2026
Primary completionEst.
Mar 31, 2028
CompletionEst.
Mar 31, 2028
Last update
May 6, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 6, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06326203
Lead sponsor
UPECLIN HC FM Botucatu Unesp
Collaborators
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Responsible party
Matheus Bertanha, PhD (Professor, UPECLIN HC FM Botucatu Unesp) — Principal investigator
First posted
Mar 22, 2024
Start date
Jun 1, 2026 (estimated)
Primary completion
Mar 31, 2028 (estimated)
Completion
Mar 31, 2028 (estimated)
Last update
May 6, 2026

Study contacts

Matheus Bertanha, Ph.D.
Contact
matheus.bertanha@unesp.br
+55(14)3880-1444
Lenize S Rodrigues, Ph.D.
Contact
Francisco J de Oliveira Filho, M.D.
principal investigator · São Paulo State University

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in May 2026. You cannot join it, but the record below documents what was studied.

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