{"id":12178,"date":"2022-09-18T17:37:04","date_gmt":"2022-09-18T15:37:04","guid":{"rendered":"https:\/\/looketmedecine.fr\/?p=12178"},"modified":"2024-10-05T23:24:16","modified_gmt":"2024-10-05T21:24:16","slug":"lipofilling-de-la-face","status":"publish","type":"post","link":"https:\/\/looketmedecine.fr\/en\/lipofilling-de-la-face\/","title":{"rendered":"LM N\u00b0 2\/ 2022. All you need to know. Lipofilling of the face. Pr Barbara Hersant"},"content":{"rendered":"
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All you need to know<\/strong><\/span><\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Lipofilling of the face<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Pr Barbara Hersant MD, PhD.\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Department of plastic, reconstructive, aesthetic and maxillofacial surgery. Henri Mondor Hospital, Cr\u00e9teil, France.<\/span><\/em><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Summary<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The advantage of adipose tissue is that it is easy to collect and can be used for <\/span>autografts.<\/span>\u00a0<\/span><\/em><\/span><\/p>

The interest of the <\/span>\"lipofilling<\/span><\/em> has long been considered as <\/span>volumizer<\/span><\/i>but the discovery of <\/span>its trophic character<\/span><\/i> has made the <\/span>lipofilling<\/span><\/i> the most widely used regenerative medicine treatment in the field of <\/span>tissue regeneration<\/span><\/i>.\u00a0<\/span><\/span><\/p>

  • Indeed, adipose tissue is a potential source of <\/span><\/i>adult mesenchymal stem cells (MSCs) <\/i><\/b>with multiple differentiation potentials.<\/span><\/i>\u00a0<\/span><\/span><\/li>
  • Mesenchymal stem cells (MSCs)<\/i><\/b> are extracted from <\/span>the cultivation of the<\/i><\/b> vascular stromal fraction (VSF)<\/i><\/b> composed of a heterogeneous population of cells with regenerative properties.\u00a0<\/span><\/span><\/li>
  • The SVF<\/i><\/b> is derived from enzymatic digestion or mechanical fractionation of adipose tissue. It is thus considered as a <\/span>alternative cellular product<\/span><\/i> allowing to avoid the culture and cell expansion steps of MSCs.<\/span><\/span><\/li>
  • Unfortunately, in France, the use of MSCs and SVF must meet regulatory constraints, being <\/span>products of cell therapy<\/span><\/i> or <\/span>\"Innovative Therapy Medicines,\" ITM<\/span><\/i>\u00a0\"(European Directive 2009\/12\/EC), thus limiting their use by research teams for clinical validation.\u00a0<\/span><\/span><\/li>
  • These limitations have led to <\/span>develop new techniques for transferring adipose tissue without going through digestion or cell culture steps<\/span><\/i>. Thus, <\/span>the development of cannulas<\/span><\/i> allowing the collection of <\/span>\"micro\" adipose lobules<\/span><\/i> has allowed the use of a fat rich in stem cells.\u00a0<\/span><\/span><\/li>
  • More recently, <\/span>Tonnard et al. <\/span><\/i>have described a <\/span>mechanical technique<\/span><\/i> allowing to obtain <\/span>emulsified fat or \"nanofat<\/span><\/i> from a sample of <\/span>microfat<\/span><\/i>. <\/span>According to the authors, this emulsified fat would be rich in progenitor cells.<\/span><\/i><\/span><\/li><\/ul>

    These regenerative medicine tools should be used and validated for specific indications in each surgical field.<\/span><\/i><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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    I\/ Lipofilling or fat grafting: an advanced therapy\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    For a long time, lipofilling was considered to be \"volumizing\" but the discovery of its trophic character (2000) made lipofilling the most widely used regenerative medicine treatment.<\/span><\/p>

    Recent studies have shown that <\/span>stroma-vascular fraction of adipose tissue<\/span><\/i><\/span> represented <\/span>a reservoir of precursor cells with pro-angiogenic potential<\/span><\/i><\/span> was comparable to that of bone marrow-derived stem cells (1).\u00a0<\/span><\/p>

    In addition, it has been shown that <\/span>mesenchymal stem cells<\/span> (CSM)<\/span><\/span><\/i> were also present in the adipose tissue.\u00a0<\/span>The latter therefore represents a new potential reservoir of pluripotent cells that could be used in regenerative medicine<\/span><\/i><\/span>.<\/span><\/p>

    Autologous fat transfer<\/span><\/i><\/span> is a procedure already applied to obtain the increase of soft tissue volume losses.\u00a0<\/span>The fat grafts removed by liposuction are reinjected subcutaneously to restore volume to the defective areas.\u00a0<\/span><\/p>

    Thus, <\/span>adipose tissue transplantation<\/span><\/i><\/span> is used to correct congenital deformities and complex traumatic wounds with loss of soft tissue, after oncological surgery, after sequelae of radiotherapy... (2).<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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    II\/ New techniques for transferring adipose tissue rich in progenitor cells\n\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    • One of the constraints of the use of ITMs in the clinic is the time required and the costs associated with their in vitro amplification. <\/span><\/li>
    • These limitations have led to the development of new cellular products.<\/span><\/li><\/ul>
      • Several techniques have been proposed for the harvesting of adipose tissue. <\/span><\/em>Coleman et al (3)<\/span><\/i> described a technique that minimizes trauma to the adipocytes. Using a 2-hole, 3-mm cannula with rounded edges connected to a 10-ml syringe, fat is manually aspirated by removing the plunger.\u00a0<\/span>The cannula is pushed through the harvest site, the surgeon pulls the plunger of the syringe and creates a slight negative pressure that allows flaps of fat to pass through the cannula and the Luer-Lock opening in the syringe barrel.\u00a0<\/span>Once filled, the syringe is disconnected from the cannula, which is replaced with a cap that seals the Luer-Lock end of the syringe.\u00a0<\/span><\/li>
      • The grease drawn into the syringes is centrifuged at 3000 RPM (revolutions per minute) for 3 minutes to isolate the grease.\u00a0<\/span><\/em><\/li>
      • However, reducing the centrifugation time to 1 min has recently been shown to be of value for cell viability (4).<\/span><\/li>
      • After centrifugation, three layers are observed:\u00a0<\/span><\/em>
        • The first layer includes oil, which can be removed with an absorbent material,\u00a0<\/span><\/li>
        • The second layer is made up of adipose tissue,\u00a0\u00a0<\/span><\/em><\/li>
        • And the third layer contains blood, tissue fluid and local anesthetic and is ejected from the base of the syringe.\u00a0<\/span><\/li>
        • The middle layer is used for fat grafting (5).<\/span><\/em><\/li><\/ul><\/li><\/ul>
          • New techniques for fat harvesting have been developed using cannulas of only 0.7mm in diameter, used to treat delicate areas of the face such as the eyelids and lips.<\/span><\/em><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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            III\/ Three types of fat are distinguished\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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            1 \"Macrofat\" fat<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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            Macrofat fat is characterized by lobules of fat <\/span>with a diameter of 2.4mm.<\/span><\/i> \u00a0<\/span><\/span>Macrofat fat is more structural in nature and is easily injected through an 18G or 19G (gauge) cannula.\u00a0<\/p>

            Macrofat fat is used for structural augmentation:<\/span><\/i><\/span><\/p>

            • In the temporal regions,\u00a0<\/span><\/li>
            • Deep fat compartments of the cheek:<\/span>
              • Medial\u00a0<\/span><\/li>
              • Prezygomatic,\u00a0<\/span><\/li>
              • The piriform region,\u00a0<\/span><\/li><\/ul><\/li>
              • The mandible,\u00a0<\/span><\/li>
              • The lateral region of the eyebrows,\u00a0<\/span><\/li>
              • The nasal bridge and columella\u00a0<\/span><\/li>
              • As well as the chin and lips.\u00a0<\/span><\/li><\/ul>

                Macrofat fat is at risk for resorption, cystosteatonecrosis, oily cysts, and infection (6-8).<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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                2 \" Microfat fat \".<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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                Microfat<\/span><\/i> is characterized by fat lobules <\/span>with a diameter of 1mm<\/span><\/i> obtained by removing the fat with <\/span>2mm diameter cannulas<\/span><\/i><\/span> whose multiple holes are each less than 1 mm.<\/span>\u00a0<\/span><\/p>

                The micro sampling cannula has ports specifically designed to provide a fat sample consisting of volume-calibrated lobules of adipocytes.\u00a0<\/span><\/p>

                The deposition microcannulas have a diameter calibrated to the size of the cell units obtained with the sampling cannula. (<\/span>Figure 1<\/b>)<\/span><\/span><\/p>

                Microfat<\/i> (microfat)<\/i> is used for trophicity but also for filling.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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                Figure 1: Microlipofilling sampling in a closed circuit to avoid oxidation and contamination of the fat and using cannulas with micro-orifices for sampling.<\/span><\/span><\/em><\/h6>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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                3 \"Nanofat\" fat<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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                \"Nano-fat or nanofat<\/span><\/i> is characterized by <\/span>Fat lobules of 400 to 600 \u03bcm.<\/span><\/i><\/span>\u00a0<\/span>Nano-fat is obtained by taking the emulsified micro-fat and passing it between two 10ml syringes linked together by a female-female Luer-Lock connector.\u00a0<\/span>After 3 minutes of continuous transfer (20 to 30 passes), the fat has become an emulsified liquid with a whitish appearance rich in SVF.\u00a0 <\/span>The emulsified fat is then filtered through a super fine filter to obtain the nanofat (9).<\/span><\/i><\/p>

                The nanofat can be easily injected with a <\/span>27G, 30G, 32G.<\/b> \u00a0<\/span><\/em>It is a cell seeding for the improvement of trophicity.<\/span><\/p>

                Nano-fats<\/span><\/i> can be centrifuged to remove free fatty acids and create a gel<\/span><\/i> which can be applied in combination with a cream that promotes dermal penetration and can be applied by mesotherapy techniques, after laser resurfacing or a face lift. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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                A combination of all three types of fat grafting is used in facial cosmetic surgery or facial fat grafting (10-13).<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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                Tonnard et al<\/span><\/i> have sought to determine the cellular content of nanofat grafts (14). <\/span><\/span>In their study, they showed that the nanofat grafts lacked mature adipocytes and that the native architecture was disrupted.\u00a0<\/span>However, the nanografts retained a rich supply of adipose stem cells.\u00a0<\/span>Several clinical cases using nanofat grafts have shown an improvement in skin quality 6 months after the procedure.\u00a0<\/span><\/i><\/p>

                Therefore, the author suggests that although nanografts do not contain viable adipocytes, their high stem cell content is clinically useful in skin rejuvenation indications.<\/span><\/i><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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                IV\/ Association of PRP and lipofilling and clinical applications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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                PRP and adipose tissue are used in different therapeutic areas. (15)<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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                Lipofilling-PRP\" in plastic surgery\n<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                Figure 2: Restoration of breast volume after partial mastectomy by lipofilling.<\/b><\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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                In plastic, reconstructive and maxillofacial surgery, PRP in combination with adipose tissue is used to :<\/span><\/p>

                • Treat skin lesions,\u00a0<\/span><\/li>
                • And for the healing of wounds, especially for the treatment of skin substance losses of origin:<\/span>
                  • \u00a0Traumatic,\u00a0<\/span><\/li>
                  • Post-infectious,\u00a0<\/span><\/li>
                  • Post-inflammatory<\/span><\/li><\/ul><\/li>
                  • The restoration of volumes (<\/span>Figure 2<\/b>),\u00a0<\/span><\/em><\/span><\/li>
                  • For the treatment of burn scars in order to improve scar trophicity (<\/span>Figure 3<\/b>)\u00a0:<\/span><\/span><\/em>
                    • Pathological scars (keloid scars),\u00a0<\/span><\/li>
                    • Skin grafts,\u00a0<\/span><\/li>
                    • Radiodermatitis\u00a0<\/span><\/li>
                    • And skin ulcers\u00a0<\/span><\/li><\/ul><\/li>
                    • This is the case for the filling of pathological defects such as lipodystrophies and facial atrophies.\u00a0<\/span><\/li>
                    • In maxillofacial and aesthetic surgery, these cellular products are used in\u00a0<\/span>
                      • Maxillofacial clefts,\u00a0<\/span><\/li>
                      • Cervico-facial lifts\u00a0<\/span><\/li>
                      • And facial rejuvenation. (16-19)<\/span><\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                        Figure 3: Lipofilling for trophic purposes to treat a deep burn injury.\n<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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                        Use of nanofat and microfat on the face<\/b><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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                        Nanofat injection in the face could therefore have a stimulating effect on tissue differentiation and regeneration (20).\u00a0<\/span>An increase in elastin synthesis and dermal remodeling could be induced by the secretory activity of stem cells mechanically stimulated by the emulsion method (21-23).<\/span><\/p>

                        Mesguich Batel F. et al<\/span><\/i> (20) reported in a study an improvement of fine lines after treatment with the nanofat method.\u00a0<\/span>In addition, the authors characterized the stem cell composition of this method and showed the presence in 1 cm3 of emulsified fat of 23,712 \u00b1 7832 cells\/cm3 compared to non-emulsified adipose tissue with a cell viability of 85.1 \u00b1 6.84 % and a proportion of 18.77 \u00b1 6.2 % of regenerating cells.<\/span><\/p>

                        In addition, intradermal injection of emulsified fat was found to be safe: no erythema, skin discoloration, or inflammatory reactions were seen in all patients (20). (<\/span>Figure 4 and 5<\/b>)<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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                        Figure 4 : Case 1 : injection of microfat and nanofat with an improvement of the skin trophicity (Case treated by Pr Hersant) <\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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                        Figure 5: Case 2: injection of microfat-nanofat and botulinum toxin (Case treated by Pr Hersant)\n<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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                        V\/ The \" Vascular Stroma Fraction \" (VSF)\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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                        FSV is isolated by digesting the lipid portion of the lipoaspirate with collagenase, separating the contents into two distinct phases: the floating fraction of mature adipocytes and the cellular components of interest in the lower water fraction (24-25).\u00a0<\/span><\/p>

                        • This separation can be improved by centrifugation, but nevertheless a comparable separation can be achieved by phase separation and gravity filtration (26).\u00a0<\/span><\/li>
                        • Centrifugation is more efficient because it also allows sedimentation of all cells present, whereas filtration can be designed to capture only important cell types based on their size, thus enriching the specific cell cocktail.\u00a0<\/span><\/li>
                        • Centrifugation of the aqueous fraction yields a reddish pellet that contains FSV cells.\u00a0<\/span><\/li>
                        • Erythrocytes, a major contaminant present in the SVF pellet, can be lysed to isolate a purer population of stem cells and\/or SVF cells if they are intended for in vitro expansion (27).\u00a0<\/span><\/li>
                        • The VSF contains a variety of cells: mesenchymal stem cells, pericytes, vascular cells, fibroblasts, pre-adipocytes, monocytes, macrophages, red blood cells, fibrous tissue and extracellular matrix (ECM).\u00a0<\/span><\/li><\/ul>

                          For clinical applications in regenerative medicine, one of the advantages of using FSV is its extemporaneous use without going through the cell culture steps.<\/span><\/i><\/p>

                          • The number of stem cells contained in adipose SVF can fluctuate considerably as patients may have different adipose tissue texture and density (28).<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
                            \n\t\t\t\t\t\t
                            \n\t\t\t\t\t
                            \n\t\t\t
                            \n\t\t\t\t\t\t
                            \n\t\t\t\t
                            \n\t\t\t\t\t

                            VI\/ Adipose tissue stem cells<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
                            \n\t\t\t\t
                            \n\t\t\t\t\t\t\t\t\t

                            Adipose Derived Stem Cells (ADSC)<\/span><\/i> were first characterized in 2001 and have since been widely studied and used as a major source of cells with regenerative potential, with characteristics similar to those of mesenchymal stem cells (MSCs) (29-31).\u00a0<\/span>Stem cells are cells capable of self-renewal, generating identical daughter cells to maintain the stem cell pool, and differentiating into multiple cell lines (progenitors with a more restricted potential).\u00a0<\/span><\/p>

                            \u00a0 \u00a0 \u00a0 \u00a0 Characterization of adipose tissue MSCs (differentiation potential, proliferation, paracrine and immunomodulatory actions)<\/b><\/span><\/p>

                            • Several studies have demonstrated the ability of adipose tissue stem cells to differentiate into adipogenic, osteogenic and chondrogenic lineages, and even into myogenic lineages, leading to skeletal muscle, smooth muscle and cardiomyocytes (32).\u00a0<\/span><\/li>
                            • MSCs have also been shown to possess the potential to differentiate into cells of both ectodermal and endodermal lineages, such as neuronal cells, endothelial cells, epithelial cells, hepatocytes, pancreatic cells, and hematopoietic cells (33-39).\u00a0<\/span><\/li>
                            • In addition, they also have a migration potential (40) and a capacity to proliferate that can be stimulated by various growth factors. (41).\u00a0<\/span><\/li>
                            • The main effects of MSCs are mediated by paracrine activity. ASCs produce and secrete a wide variety of growth factors, cytokines, and chemokines that may be involved in wound healing by secreting angiogenic and anti-apoptotic growth factors (42).\u00a0<\/span><\/li>
                            • In addition, adipose tissue MSCs modulate monocytes, macrophages, T and B lymphocytes by inducing the host immune response.<\/span><\/li>
                            • MSCs from adipose tissue in cell therapy<\/b><\/li><\/ul>
                              • One of the advantages of using MSCs from adipose tissue, and not the least, is the ease of obtaining these cells. They do not pose any ethical problems, unlike embryonic stem cells.\u00a0<\/span><\/li>
                              • Indeed, they are recovered directly from the fat of the \"surgical waste\", after dermolipectomy or liposuction. 10 to 100 million stem cells can be obtained from 300 milliliters of lipoaspirate of which more than 90% would be viable (43). A large number of stem cells can be obtained in a few passages.<\/span><\/li><\/ul>
                                • Optimization of cell therapy protocols using adipose tissue MSCs<\/b><\/span><\/li><\/ul>
                                  • Regenerative medicine, which aims to stimulate tissue repair and regeneration mechanisms, offers the possibility of effective treatment strategies in combination.\u00a0<\/span><\/li>
                                  • However, in this field, the tissue engineering approaches proposed so far have involved in vitro expansion of autologous or allogeneic cells (44).\u00a0<\/span><\/li>
                                  • The future of reconstructive surgery will favor autologous cell therapy, if possible extemporaneous, for skin regeneration.\u00a0<\/span><\/li>
                                  • Despite promising results in animal models of injury, the use of ASCs (<\/span>Adipose Stem Cells)\u00a0<\/span><\/i> has shown mixed results in clinical trials for skin healing (45), due to their poor viability after transplantation.<\/span><\/li>
                                  • In a study published in \"International Stem Cells\", we showed that the combination of PRP with cell therapy by injection of adipose tissue MSCs seems to improve skin healing in the mouse model.\u00a0<\/li><\/ul>
                                    • Indeed, treatment with MSC injections and the combination of MSC and PRP significantly improves skin regeneration.\u00a0<\/span><\/li>
                                    • Time to healing was also significantly improved by the combination of MSC and PRP compared to MSC alone, PRP alone and the control.\u00a0<\/span><\/li>
                                    • We were able to explain these preclinical results by the demonstration of activation of the MSC secretome by PRP, reflected by activation of human-derived VEGF and IL-6 transcriptional expression in mouse transplant biopsies and also by increased MSC survival (46).<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
                                      \n\t\t\t\t\t\t
                                      \n\t\t\t\t\t
                                      \n\t\t\t
                                      \n\t\t\t\t\t\t
                                      \n\t\t\t\t
                                      \n\t\t\t\t\t

                                      VII\/ Bioethics law and regulatory aspects\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
                                      \n\t\t\t\t
                                      \n\t\t\t\t\t
                                      Blood derivatives: precise regulations\n<\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
                                      \n\t\t\t\t
                                      \n\t\t\t\t\t\t\t\t\t

                                      Autologous Platelet Concentrate (APC) preparations are considered human blood products.\u00a0<\/b><\/i><\/p>

                                          • They are therefore subject to Article L. 1221-8 of the Public Health Code.\u00a0<\/span><\/li>
                                          • In contrast, the Public Health Code provides for the use of autologous platelet concentrates for therapeutic purposes in the context of a single medical intervention, without being stored or prepared within a third-party organization or institution.<\/span><\/li>
                                          • In a press release published on January 10, 2018, the ANSM (National Agency for the Safety of Medicines and Health Products) reminds that<\/strong>\u00a0<\/span>the cosmetic use of autologous platelet concentrates<\/b>\u00a0(CPA), also known as\u00a0<\/strong><\/span>platelet-rich plasma (PRP), is prohibited in France.\u00a0<\/strong><\/li>
                                          • It is therefore the objective of the intervention (therapeutic or aesthetic) that determines the applicable regulations.\u00a0<\/strong><\/li>
                                          • It is therefore possible to use PRP in functional or reconstructive surgery (e.g. scarring).<\/span><\/strong>
                                            <\/b><\/li><\/ul><\/li><\/ul><\/li><\/ul>

                                            The use of stem cells is qualified by the ANSM as \"cellular products for therapeutic purposes\" are human cells used for autologous therapeutic purposes,\u00a0<\/b><\/i><\/p>

                                            • When these cellular products for therapeutic purposes are pharmaceutical specialties or other industrially manufactured medicines (advanced therapy medicinal product - ITM), they are governed by the rules applicable to medicines.\u00a0<\/span><\/li>
                                            • They also fall within the scope of pharmacovigilance.\u00a0\u00a0<\/span><\/li><\/ul>

                                              ITMs are cells or tissues that have been subjected to substantial manipulation so as to obtain biological characteristics, physiological functions, or structural properties useful for the intended regeneration, repair, or replacement and\/or the cells or tissues are not intended to be used for the same essential function(s) in the recipient and the donor.\u00a0<\/i><\/strong><\/p>

                                              • According to the regulation 1394\/2007, the non-substantial manipulations include: cutting, crushing, centrifugation, sterilization, irradiation, separation, concentration, cryopreservation and freezing.<\/span><\/li>
                                              • Four categories of ITMs are defined: gene therapy ITMs, somatic cell therapy ITMs, tissue and cell engineering ITMs and combined advanced therapy drugs (combining an ITM with a medical device).\u00a0<\/em><\/strong><\/li>
                                              • When they are not industrially manufactured, they are then qualified as cell therapy preparations, including when human cells are used to transfer genetic material. They are thus subject to biovigilance.<\/span><\/li>
                                              • T<\/b>ocell therapy and bioethics law<\/b><\/span><\/li><\/ul>

                                                Industrially manufactured cellular products for therapeutic purposes are subject to the requirement, prior to their commercialization, to obtain a marketing authorization.\u00a0<\/i><\/strong><\/p>

                                                  • They must be manufactured in licensed pharmaceutical facilities.<\/span><\/li>
                                                  • Cell therapy preparations, which are not manufactured industrially, are subject to prior authorization by the ANSM, which obtains the opinion of the Agence de biom\u00e9decine beforehand.\u00a0<\/span><\/li>
                                                  • This authorization is issued after evaluation of their preparation and conservation process and their therapeutic indications.<\/span><\/li>
                                                  • The ANSM also issues authorizations to establishments or organizations carrying out the activities of preparation, storage, distribution and transfer, for autologous or allogeneic therapeutic purposes, of cell therapy preparations. <\/span>The authorization is issued after the opinion of the biomedicine agency (47).<\/span><\/i><\/li>
                                                  • Non-substantial handling according to Regulation (EC) 1394\/2007 :<\/span><\/i><\/li><\/ul><\/li><\/ul>
                                                          1. Cutting<\/i><\/strong><\/li>
                                                          2. Grinding<\/i><\/strong><\/li>
                                                          3. Centrifugation<\/i><\/strong><\/li>
                                                          4. Sterilization<\/i><\/strong><\/li>
                                                          5. Irradiation<\/i><\/strong><\/li>
                                                          6. Separation, concentration<\/i><\/strong><\/li>
                                                          7. Cryopreservation, freezing<\/i><\/strong><\/li><\/ol><\/li><\/ol><\/li><\/ol><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
                                                            \n\t\t\t\t\t\t
                                                            \n\t\t\t\t\t
                                                            \n\t\t\t
                                                            \n\t\t\t\t\t\t
                                                            \n\t\t\t\t
                                                            \n\t\t\t\t\t

                                                            Conclusion\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
                                                            \n\t\t\t\t
                                                            \n\t\t\t\t\t\t\t\t\t
                                                            • Emulsified fat<\/i><\/span> thus seems to be a simple alternative to cell therapy procedures and SVF preparation.<\/strong><\/li>
                                                            • The injection of fragmented adipocytes<\/i> present in emulsified fat and the cytokines released could therefore have a stimulating effect on tissue differentiation and regeneration. <\/span><\/strong><\/span><\/li>
                                                            • In the field of regenerative medicine, l<\/strong>ocellular biotherapies offer major perspectives in many pathologies where therapeutic resources are currently insufficient. <\/strong><\/span><\/i><\/li>
                                                            • Moreover, the development of these cellular products is now based on progress in the fundamental knowledge of the physiopathological processes underlying the disease in question, as well as on the precise mechanism of action of the cells administered.<\/span><\/strong><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
                                                              \n\t\t\t\t\t\t
                                                              \n\t\t\t\t\t
                                                              \n\t\t\t
                                                              \n\t\t\t\t\t\t
                                                              \n\t\t\t\t
                                                              \n\t\t\t\t\t

                                                              References<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
                                                              \n\t\t\t\t
                                                              \n\t\t\t\t\t\t\t\t\t
                                                              • Zimmerlin L, Donnenberg VS, Pfeifer ME, Meyer EM, et al. Stromal vascular progenitors in adult human adipose tissue. Cytometry A 2010; 77:22-30.<\/span><\/em><\/li><\/ul>
                                                                • Simonacci F, Bertozzi N, Grieco MP, Grignaffini E, Raposio E. Procedure, applications, and outcomes of autologous fat grafting. Ann Med Surg (Lond). 2017 Jun 27; 20:49-60.<\/span><\/em><\/li><\/ul>
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                                                                    Tout ce que vous voulez savoir Le lipofilling de la face Pr Barbara Hersant MD, PhD. D\u00e9partement de chirurgie plastique, reconstructrice, esth\u00e9tique et maxillo-faciale. H\u00f4pital Henri Mondor, Cr\u00e9teil, France. R\u00e9sum\u00e9 Le tissu adipeux pr\u00e9sente l\u2019avantage de la facilit\u00e9 de pr\u00e9l\u00e8vement et la possibilit\u00e9 de pouvoir r\u00e9aliser des autogreffes.\u00a0 L\u2019int\u00e9r\u00eat du \u00ab\u00a0lipofilling\u00a0\u00bb a \u00e9t\u00e9 longtemps consid\u00e9r\u00e9 […]<\/p>\n","protected":false},"author":2,"featured_media":13354,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[174],"tags":[291,290],"auteur":[390],"mots-cles":[],"class_list":["post-12178","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tout-ce-que-vous-voulez-savoir","tag-lm3-tout-ce-que-vous-voulez-savoir","tag-replay-lm3","auteur-barbara-hersant"],"acf":[],"yoast_head":"\nLM N\u00b0 2\/ 2022. Tout ce que vous voulez savoir. Le lipofilling de la face. 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