Factors That Influence Adipose Derived Regenerative Cells' Yield and Viability

January 7, 2016 updated by: Katarina Andjelkov, Clinical Centre of Serbia

Factors That May Influence Yield and Viability of Extracted Adipose Derived Regenerative Cells' Per Gram of Fat Tissue

Human adipose tissue has been shown to contain a group of cells that possess extensive proliferative capacity and the ability to differentiate into multiple cell lineages. Cells isolated from the fatty portion are termed processed lipoaspirate cells that contain adipose-derived regenerative cells (ADRCs). ADRCs are most conveniently extracted from tissue during an elective cosmetic liposuction procedure but may also be obtained from resected adipose tissue.

This study is aimed to verify if there are differences between the number and viability of cells obtained from patients with different age, sex, Body Mass Index (BMI), smoking and physical activity, within the different amount of processed fat.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Method: We analyzed 46 patients, both sexes, who filled out a questionnaire about their age and habits (sport activity and smoking). They were then divided into two groups. Group 1 consisted of patients with normal BMI range from 18,5 to 24.9 (n=27) and Group 2 had overweight patients with BMI index 25 to 29.9 (n=19). There were no underweight or obese patients. All 46 patients had the ADRCS extracted for therapeutical use, but with different indications. The mixture of 180 mL saline solution, 1mL Epinephrine (1:10,000) and 20 mL of 2% lidocaine is injected in the subcutaneous layer of the abdominal wall to allow the tumescence and to decrease the blood loss. The manual liposuction procedure has been carried out through two or three small incisions using harvester (Tulip® medical products, San Diego, USA). All of them had liposuction done by the author and in the same manner (tumescent technique, same cannula) to obtain 120-200ml of fat. The harvest site is then covered with a pressure dressing for 10 days to reduce swelling and hematoma. The closed system PureGraft® 250mL (PureGraft®, Solana Beach, California, USA) has been used used to collect the specimen. The specimen is transferred within 15 min to the BelPrime Clinic laboratory where the Celution® 800/CRS system (Cytori Therapeutics, Inc. San Diego, California, USA) is applied to process the lipoaspirate in order to obtain ADRCs. The Celution® 800/CRS system is a closed automated medical device that helps to separate blood and fat. The system will then digests fat using the proprietary enzyme reagent Celase 835/CRS (Cytori Therapeutics, Inc. San Diego, California, USA) to release the stromal vascular fraction (SVF). SVF is subsequently concentrated by a short centrifugation and then automated wash cycles to obtain the ADRC fraction. This 90 to 120-minute process provides approximately 5mL of pellet. A few drops of the obtained pellet were immediately used for cell counting (ChemoMetec A/S DK-3450, Allerod, Denmark).

Results/Complications: Number of ADRCS obtained, cells' viability, viable ADRCS per gram of fat processed, ADRCS for active dose and total volume for cell therapy were statistically analyzed in correlation with patients' BMI, sport activity, sex, age and smoking habits and amount of processed fat.

Study Type

Observational

Enrollment (Actual)

46

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

All patients were healthy individuals, both genders with request for subcutaneous transplantation of autologous cell enriched adipose tissue for different indications

Description

Inclusion Criteria:

The inclusion criteria were: healthy individuals, both genders, there were no age nor BMI restriction, smokers and no smokers searching for local, subcutaneous transplantation of ADRCs.

Exclusion Criteria:

The exclusion criteria were autoimmune diseases, inflammatory bowel disease, presence of malignant or chronic infectious disease, or immunosuppressive therapy.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Body Mass Index (Calculated in kg/m2)
Time Frame: 1h before the surgery
Calculated in kg/m2
1h before the surgery

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
ADRCs yield (Calculated in number of cells per gram of tissue)
Time Frame: 2h after the surgery
Calculated in number of cells per gram of tissue
2h after the surgery
ADRCs viability (Calculated in percentage)
Time Frame: 2h after the surgery
Calculated in percentage
2h after the surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Clinical Centre of Serbia

Investigators

  • Principal Investigator: Katarina Andjelkov, MD PhD, BelPrime Clinic

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2014

Primary Completion (Actual)

April 1, 2014

Study Completion (Actual)

April 1, 2015

Study Registration Dates

First Submitted

January 2, 2016

First Submitted That Met QC Criteria

January 7, 2016

First Posted (Estimate)

January 8, 2016

Study Record Updates

Last Update Posted (Estimate)

January 8, 2016

Last Update Submitted That Met QC Criteria

January 7, 2016

Last Verified

January 1, 2016

More Information

Terms related to this study

Other Study ID Numbers

  • CCSerbia

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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