Hydrogel forming microneedles loaded with VEGF and Ritlecitinib/polyhydroxyalkanoates nanoparticles for mini-invasive androgenetic alopecia treatment  

作　　者：Yan-Wen Ding Yang Li Zhi-Wei Zhang Jin-Wei Dao Dai-Xu Wei 

机构地区：[1]Key Laboratory of Resource Biology and Biotechnology in Western China,Ministry of Education,School of Medicine,Department of Life Sciences and Medicine,Northwest University,Xi’an,710069,China [2]School of Clinical Medicine,Chengdu University,Chengdu,China [3]Dehong Biomedical Engineering Research Center,Dehong Teachers’College,Dehong,Yunnan Province,China [4]Shaanxi Key Laboratory for Carbon Neutral Technology,Xi’an,710069,China

出　　处：《Bioactive Materials》2024年第8期95-108,共14页生物活性材料（英文）

基　　金：supported by Grants from National Natural Science Foundation of China(Grant No.s 31900950 and 32000944);the Project Supported by Natural Science Basic Research Plan in Shaanxi Province of China(Grant No.2024JC-YBMS-706);Collaborative Innovation Project of Zigong Medical Big Data and Artificial Intelligence Research Institute(Grant No.2023-YGY-1-02);Key Science and Technology Plan Project of Zigong(Grant No.2022ZCNKY07)。

摘　　要：Androgenetic alopecia(AGA),the most prevalent clinical hair loss,lacks safe and effective treatments due to downregulated angiogenic genes and insufficient vascularization in the perifollicular microenvironment of the bald scalp in AGA patients.In this study,a hyaluronic acid(HA)based hydrogel-formed microneedle(MN)was designed,referred to as V-R-MNs,which was simultaneously loaded with vascular endothelial growth factor(VEGF)and the novel hair loss drug Ritlecitinib,the latter is encapsulated in slowly biodegradable polyhydroxyalkanoates(PHAs)nanoparticles(R-PHA NPs)for minimally invasive AGA treatment.The integration of HA based hydrogel alongside PHA nanoparticles significantly bolstered the mechanical characteristics of microneedles and enhanced skin penetration efficiency.Due to the biosafety,mechanical strength,and controlled degradation properties of HA hydrogel formed microneedles,V-R-MNs can effectively penetrate the skin’s stratum corneum,facilitating the direct delivery of VEGF and Ritlecitinib in a minimally invasive,painless and long-term sustained release manner.V-R-MNs not only promoted angiogenesis and improve the immune microenvironment around the hair follicle to promote the proliferation and development of hair follicle cells,but also the application of MNs to the skin to produce certain mechanical stimulation could also promote angiogenesis.In comparison to the clinical drug minoxidil for AGA treatment,the hair regeneration effect of V-R-MN in AGA model mice is characterized by a rapid onset of the anagen phase,improved hair quality,and greater coverage.This introduces a new,clinically safer,and more efficient strategy for AGA treatment,and serving as a reference for the treatment of other related diseases.

关 键 词：Hydrogel forming microneedles POLYHYDROXYALKANOATES VEGF Ritlecitinib Androgenetic alopecia treatment 

分 类 号：TB383[一般工业技术—材料科学与工程]