Clinical trial NCT03806361: Fat Grafts With Adipose-derived Regenerative Cells for Soft Tissue Reconstruction in Children
Official title: Fat Grafts Supplemented With Adipose-derived Regenerative Cells for Soft Tissue Reconstruction in Children With Craniofacial Microsomia
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Craniofacial Microsomia
Lead sponsor: Hospital Sirio-Libanes
Sponsor class: OTHER
First posted: 2019-01-16
Enrollment: 30
Sex: ALL
Minimum age (years): 10
Maximum age (years): 18
Standard ages: CHILD
ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Randomized, controlled, clinical trial with 2 parallel comparison groups
Primary purpose: TREATMENT

Brief summary: Although first reports of the clinical use of adipose-derived regenerative cells (ADRC) suggest that this approach may be feasible and effective for soft tissue augmentation, there is a lack of randomized, controlled clinical trials in the literature. Hence, this study aimed to investigate whether a novel protocol for isolation of ADRC and their use in combination with fat tissue improve the long-term retention of the grafts in paediatric patients with craniofacial microsomia.

Detailed description: To overcome problems associated with fat grafting, such as unpredictable clinical results and a low rate of graft survival, many innovative efforts and refinements of surgical techniques have been reported. For example, condensation of living tissue and removal of unnecessary components have been performed by centrifugation, filtration or gravity sedimentation; external mechanical force has been used to expand the recipient tissue as well as the overlying skin envelope; and a recent experimental study has suggested that repeated local injections of erythropoietin might enhance retention of grafted fat.

Based on the finding that aspirated fat tissue contains a much smaller number of adipose-derived regenerative cells (ADRC) compared with intact tissue and that these cells play pivotal roles in the adipose tissue remodeling after lipoinjection, the supplementation of fat grafts with stromal vascular fraction isolated from adipose portion of liposuction aspirates has been proposed as a method to compensate its relative deficiency of ADRC.

In the literature, there are at least three experimental studies demonstrating that supplementation of adipose progenitor cells enhances the volume or weight of surviving adipose tissue, and first reports of the clinical use of ADRC suggest that this approach may be feasible and effective for soft tissue augmentation.

However, since these studies represent level of evidence IV, which correspond to the publication of case series, there is a lack of randomized, controlled clinical trials comparing this method to current standard techniques.

Hence, this study aimed to fill this gap by investigating whether a novel protocol for isolation of ADRC and their use in combination with fat tissue improve the long-term retention of the grafts in paediatric patients with craniofacial microsomia.

Eligibility criteria: Inclusion Criteria:

* Unilateral craniofacial microsomia
* 10 to 18 years old
* Phenotype: (M0, M1 or M2) and (S1 or S2) according to the OMENS-Plus classification

Exclusion Criteria:

* Previous facial soft tissue surgery
* Absence of fat donor site

Primary outcomes:
measure: Volumetric analysis of both hemifaces
timeFrame: Preoperative, 1 month postoperative, 3 months postoperative and 6 months postoperative
Secondary outcomes:
measure: Number of viable cells
timeFrame: Intraoperative and immediate postoperative period
Other outcomes:
Locations:
city: São Paulo
country: Brazil
facility: Hospital Municipal Infantil Menino Jesus
state: SP
Study officials:
References: