{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T05:28:21Z","timestamp":1788931701776,"version":"build-2803163510"},"reference-count":90,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2025,8,26]],"date-time":"2025-08-26T00:00:00Z","timestamp":1756166400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Sayenza Biosciences Inc.","award":["227743"],"award-info":[{"award-number":["227743"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Bioengineering"],"abstract":"<jats:p>Autologous fat grafting of human lipoaspirate (LA) is increasingly used in reconstructive and cosmetic surgery for lipofilling and stem cell-rich \u201cnanofat\u201d reinjection for regenerative medicine. While commercial devices (e.g., REVOLVE and Puregraft) are available, many surgeons use non-standardized manual washing techniques, leading to inconsistent graft retention (20\u201380%). Moreover, no system can unite washing directly with mechanical processing to produce a nanofat-like product directly from raw LA. We developed a novel preparation device (PD) that is designed for peristaltic pump-driven washing of LA and can be seamlessly combined with our previously developed Emulsification and Micronization Device (EMD) into an automated closed-loop platform. Human LA samples were washed with the PD and compared to standard manual washing via visual colorimetric analysis. We then evaluated the mechanical processing of PD-washed LA using our EMD and assessed cell count, viability, and stromal vascular fraction-derived subpopulations (i.e., mesenchymal stem cells, endothelial progenitor cells (EPCs), pericytes, transit-amplifying (TA) progenitor cells, and supra-adventitial adipose stromal cells). Recirculating LA through the PD for at least one minute resulted in sufficient mixing, producing LA with equivalent color and quality to manual washing. Integrating the EMD within a platform enabled both washing and mechanical processing under peristaltic flow, enriching key subpopulations compared to manual methods. Thus, our fluidic platform effectively washes LA in a closed-loop system, minimizing LA tissue manipulation and opportunity for contamination while also simplifying the workflow for mechanical processing. Further refinement and automation of this platform would enhance the reproducibility and quality of small-volume fat grafts, cell-assisted lipotransfer, and stem\/progenitor cell injections to promote wound healing and angiogenesis.<\/jats:p>","DOI":"10.3390\/bioengineering12090918","type":"journal-article","created":{"date-parts":[[2025,8,26]],"date-time":"2025-08-26T14:43:18Z","timestamp":1756219398000},"page":"918","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Integrated Fluidic Platform for Washing and Mechanical Processing of Lipoaspirate for Downstream Fat Grafting and Regenerative Applications"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0171-0157","authenticated-orcid":false,"given":"David","family":"Zalazar","sequence":"first","affiliation":[{"name":"Department of Biomedical Engineering, University of California Irvine, Irvine, CA 92697, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-4405-9518","authenticated-orcid":false,"given":"Jiayi","family":"Feng","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, University of California Irvine, Irvine, CA 92697, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Derek A.","family":"Banyard","sequence":"additional","affiliation":[{"name":"Sayenza Biosciences Inc., Irvine, CA 92617, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4138-2119","authenticated-orcid":false,"given":"Marzieh","family":"Aliaghaei","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, University of California Irvine, Irvine, CA 92697, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5705-8073","authenticated-orcid":false,"given":"Alan D.","family":"Widgerow","sequence":"additional","affiliation":[{"name":"Department of Plastic Surgery, School of Medicine, University of California Irvine, Orange, CA 92868, USA"},{"name":"Center for Tissue Engineering, University of California Irvine, Orange, CA 92868, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6095-1778","authenticated-orcid":false,"given":"Jered B.","family":"Haun","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering, University of California Irvine, Irvine, CA 92697, USA"},{"name":"Department of Chemical and Biomolecular Engineering, University of California Irvine, Irvine, CA 92697, USA"},{"name":"Department of Materials Science and Engineering, University of California Irvine, Irvine, CA 92697, USA"},{"name":"Chao Family Comprehensive Cancer Center, University of California Irvine, Orange, CA 92868, USA"},{"name":"Center for Advanced Design and Manufacturing of Integrated Microfluidics, University of California Irvine, Irvine, CA 92697, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,8,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"150","DOI":"10.1016\/j.tibtech.2006.01.010","article-title":"Fat Tissue: An Underappreciated Source of Stem Cells for Biotechnology","volume":"24","author":"Fraser","year":"2006","journal-title":"Trends Biotechnol."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Bunnell, B. 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