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Long-term perfusion of MVNs is often required for the maturation of organ phenotypes and disease pathologies and to model the transport of cells and drugs entering organs. In our microphysiological system, we observe that flow can recover perfusion in regressed MVNs and maintain perfusable MVNs for at least 51 days. Throughout the 51 days, however, the MVNs are continuously remodeling to align with the direction of bulk flow and only appear to attain morphological homeostasis with the use of maintenance medium without growth factors. We observed that the flow resistance of the MVNs decreases over time, and using a computational model, we show that stable vessels have higher flow rates and velocities compared to regressing vessels. Cytokine analysis suggests that static conditions generate an inflammatory state, and that continuous flow reduces inflammation over an extended period. Finally, through bulk RNA sequencing we identify that both the endothelial and fibroblast cells are actively engaged in vascular and matrix remodeling due to flow and that these effects persist for at least 2 weeks. This MPS can be applied to study hemodynamically driven processes, such as metastatic dissemination or drug distribution, or to model long-term diseases previously not captured by MPS, such as chronic inflammation or aging-associated diseases.<\/jats:p>","DOI":"10.1101\/2025.03.17.643791","type":"posted-content","created":{"date-parts":[[2025,3,19]],"date-time":"2025-03-19T15:51:35Z","timestamp":1742399495000},"source":"Crossref","is-referenced-by-count":3,"title":["Remodeling of self-assembled microvascular networks under long term flow"],"prefix":"10.64898","author":[{"given":"Marie","family":"Floryan","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elena","family":"Cambria","sequence":"additional","affiliation":[{"name":"Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Adriana","family":"Blazeski","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark F.","family":"Coughlin","sequence":"additional","affiliation":[{"name":"Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhengpeng","family":"Wan","sequence":"additional","affiliation":[{"name":"Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giovanni","family":"Offeddu","sequence":"additional","affiliation":[{"name":"Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vinayak","family":"Vinayak","sequence":"additional","affiliation":[{"name":"Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA 19104, USA"},{"name":"Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aayush","family":"Kant","sequence":"additional","affiliation":[{"name":"Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA 19104, USA"},{"name":"Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vivek","family":"Shenoy","sequence":"additional","affiliation":[{"name":"Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA 19104, USA"},{"name":"Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roger D.","family":"Kamm","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA"},{"name":"Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"54368","reference":[{"key":"2026041123502649000_2025.03.17.643791v1.1","doi-asserted-by":"publisher","DOI":"10.1101\/cshperspect.a016345"},{"key":"2026041123502649000_2025.03.17.643791v1.2","doi-asserted-by":"publisher","DOI":"10.1164\/ajrccm.164.supplement_2.2106065"},{"key":"2026041123502649000_2025.03.17.643791v1.3","doi-asserted-by":"publisher","DOI":"10.1016\/bs.ircmb.2016.05.001"},{"key":"2026041123502649000_2025.03.17.643791v1.4","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.adg9781"},{"key":"2026041123502649000_2025.03.17.643791v1.5","doi-asserted-by":"publisher","DOI":"10.1038\/nprot.2017.018"},{"key":"2026041123502649000_2025.03.17.643791v1.6","doi-asserted-by":"publisher","DOI":"10.1101\/2023.11.28.568627"},{"key":"2026041123502649000_2025.03.17.643791v1.7","doi-asserted-by":"publisher","DOI":"10.1002\/adhm.202201784"},{"key":"2026041123502649000_2025.03.17.643791v1.8","doi-asserted-by":"crossref","first-page":"2400921","DOI":"10.1002\/advs.202400921","article-title":"Transmural Flow Upregulates PD-L1 Expression in Microvascular Networks","volume":"11","year":"2024","journal-title":"Adv. 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