Denne side blev automatisk oversat, og nøjagtigheden af ​​oversættelsen er ikke garanteret. Der henvises til engelsk version for en kildetekst.

Systemic Biochemical Signature and Functional Quality Index of Calcaneal Bone Marrow Aspirate in Adults Undergoing Foot or Ankle Surgery (IQF-BMA)

30. august 2026 opdateret af: Universidade Sao Francisco

Systemic Biochemical Signature in Adults Undergoing Foot or Ankle Surgery: Integrating Routine Laboratory Markers to Assess the Functional Quality of Calcaneal Bone Marrow Aspirate Mesenchymal Stem Cells in a Prospective Cohort

This observational prospective cohort study will evaluate whether routine blood tests are associated with the functional quality of calcaneal bone marrow aspirate mesenchymal stem cells in adults undergoing clinically indicated foot or ankle surgery at a university hospital in Brazil. Participants aged 40 to 80 years, with or without comorbidities, including type 2 diabetes mellitus and, when present, active Wagner grade 2-4 diabetic foot ulcers, will be eligible for inclusion.

Before surgery, participants will undergo routine blood tests, including complete blood count, glucose and lipid profile, mineral-renal markers, and tissue damage markers. During the clinically indicated surgery, calcaneal bone marrow aspirate will be collected from the same operative field. Mesenchymal stem cells will be isolated and evaluated in the laboratory for clonogenic capacity, osteogenic and adipogenic differentiation, cellular senescence, and secretion of inflammatory and anti-inflammatory cytokines.

A composite Functional Quality Index of Bone Marrow Aspirate (IQF-BMA) will be constructed from routine laboratory markers to characterize inflammatory, metabolic, mineral-renal, and tissue-damage burden. The primary objective is to examine the association between the IQF-BMA and mesenchymal stem cell functional outcomes, particularly clonogenic capacity. This exploratory study will not be used to guide individual treatment decisions.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Detaljeret beskrivelse

This is a single-center, observational, prospective cohort study conducted at a university hospital in Brazil. The study will enroll 40 adults aged 40 to 80 years who are undergoing clinically indicated foot or ankle surgery. Participants may present with or without comorbidities, including type 2 diabetes mellitus and, when present, active Wagner grade 2-4 diabetic foot ulcers. These clinical characteristics will be recorded as observational variables and will not define intervention assignments or separate study arms. All participants will provide written informed consent before any study procedures.

Before surgery, participants will undergo a panel of routine laboratory tests covering four domains: inflammatory burden, including complete blood count, derived inflammatory indices, and albumin; glycometabolic burden, including fasting glucose, oral glucose tolerance test when clinically feasible, HbA1c, triglycerides, and cholesterol profile; mineral-renal burden, including creatinine, urea, ionized calcium, phosphorus, magnesium, alkaline phosphatase, parathyroid hormone, and 25-OH vitamin D; and tissue-energetic damage, including lactate dehydrogenase, AST, and ALT.

During the clinically indicated orthopedic surgery, calcaneal bone marrow aspirate will be collected from the same operative field. Mesenchymal stem cells will be isolated, cultured, and evaluated using standardized functional assays, including clonogenic capacity, osteogenic differentiation, adipogenic differentiation, cellular senescence, cytokine secretion, and cellular viability.

The Functional Quality Index of Bone Marrow Aspirate (IQF-BMA) will be constructed from standardized routine laboratory variables representing inflammatory, glycometabolic, mineral-renal, and tissue-energetic domains. The primary analysis will examine the association between the IQF-BMA and the clonogenic capacity of calcaneal bone marrow mesenchymal stem cells. Secondary analyses will examine associations between laboratory markers or the composite index and other cellular functional outcomes. Results will be reported primarily as effect estimates and 95% confidence intervals to support the planning of future, larger studies.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

40

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

    • São Paulo
      • Bragança Paulista, São Paulo, Brasilien, 12916900

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Adults aged 40 to 80 years undergoing clinically indicated foot or ankle surgery at a university hospital in Brazil. Participants may have comorbidities, including type 2 diabetes mellitus and, when present, active Wagner grade 2-4 diabetic foot ulcers. All participants will undergo standardized preoperative blood collection and intraoperative calcaneal bone marrow aspirate collection for observational laboratory analyses.

Beskrivelse

Inclusion Criteria

  • Age 40 to 80 years.
  • Scheduled for clinically indicated foot or ankle surgery at the participating university hospital.
  • Ability to understand the study procedures and provide written informed consent.
  • Willingness to provide preoperative blood samples and intraoperative calcaneal bone marrow aspirate according to the study protocol.
  • Participants may have comorbidities, including type 2 diabetes mellitus and, when present, active Wagner grade 2-4 diabetic foot ulcers. These clinical characteristics will be recorded for observational analyses and do not define separate study groups.

Exclusion Criteria

  • Critical limb ischemia without revascularization options or hemodynamic instability.
  • Active systemic infection or sepsis at the time of enrollment.
  • End-stage renal disease requiring dialysis.
  • Current use of high-dose systemic corticosteroids or other immunosuppressive drugs.
  • Current or recent malignancy within the last 5 years, except adequately treated non-melanoma skin cancer.
  • Significant cognitive impairment or psychiatric condition that, in the opinion of the investigator, precludes informed consent or adherence to study procedures.
  • Pregnancy or breastfeeding.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Foot/Ankle Surgery Cohort
Adults undergoing clinically indicated foot or ankle surgery at a university hospital in Brazil, with or without comorbidities, including type 2 diabetes mellitus and, when present, active Wagner grade 2-4 diabetic foot ulcers. Blood samples and calcaneal bone marrow aspirate will be collected for systemic laboratory tests and mesenchymal stem cell functional assays.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Clonogenic capacity of calcaneal bone marrow mesenchymal stem cells (CFU-F)
Tidsramme: Up to 14 days after bone marrow aspirate collection.
Number of colony-forming unit fibroblasts (CFU-F) per milliliter of calcaneal bone marrow aspirate, quantified in primary culture under standardized conditions.
Up to 14 days after bone marrow aspirate collection.

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Osteogenic and adipogenic differentiation of mesenchymal stem cells
Tidsramme: Up to 28 days after bone marrow aspirate collection.
Osteogenic and adipogenic differentiation capacity of calcaneal bone marrow mesenchymal stem cells, assessed by alkaline phosphatase activity and semi-quantitative scoring of Alizarin Red and Oil Red O staining.
Up to 28 days after bone marrow aspirate collection.

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Vanessa Bertolucci, PhD Candidate, Universidade Sao Francisco

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

20. september 2026

Primær færdiggørelse (Anslået)

1. juli 2028

Studieafslutning (Anslået)

1. juni 2029

Datoer for studieregistrering

Først indsendt

30. august 2026

Først indsendt, der opfyldte QC-kriterier

30. august 2026

Først opslået (Faktiske)

3. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

3. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. august 2026

Sidst verificeret

1. august 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • USF-IQF-BMA-DFU-001

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .