Milk-derived exosomes carrying siRNA-KEAP1 promote diabetic wound healing by improving oxidative stress

Diabetic wounds are a serious complication of diabetes mellitus (DM) that can lead to persistent infection, amputation, and even death. Prolonged oxidative stress has been widely recognized as a major instigator in the development of diabetic wounds; therefore, oxidative stress is considered a promi...

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Veröffentlicht in:Drug delivery and translational research 2023-09, Vol.13 (9), p.2286-2296
Hauptverfasser: Xiang, Xuejiao, Chen, Jing, Jiang, Tao, Yan, Chengqi, Kang, Yu, Zhang, Maojie, Xiang, Kaituo, Guo, Jiahe, Jiang, Guoyong, Wang, Cheng, XiangXu, Yang, Xiaofan, Chen, Zhenbing
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container_issue 9
container_start_page 2286
container_title Drug delivery and translational research
container_volume 13
creator Xiang, Xuejiao
Chen, Jing
Jiang, Tao
Yan, Chengqi
Kang, Yu
Zhang, Maojie
Xiang, Kaituo
Guo, Jiahe
Jiang, Guoyong
Wang, Cheng
XiangXu
Yang, Xiaofan
Chen, Zhenbing
description Diabetic wounds are a serious complication of diabetes mellitus (DM) that can lead to persistent infection, amputation, and even death. Prolonged oxidative stress has been widely recognized as a major instigator in the development of diabetic wounds; therefore, oxidative stress is considered a promising therapeutic target. In the present study, Keap1/Nrf2 signaling was confirmed to be activated in streptozotocin (STZ)-induced diabetic mice and methylglyoxal (MGO)-treated human umbilical vein endothelial cells (HUVECs). Knockdown of Keap1 by siRNA reversed the increase in Keap1 levels, promoted the nuclear translocation of Nrf2, and increased the expression of HO-1, an antioxidant protein. To explore therapeutic delivery strategies, milk-derived exosomes (mEXOs) were developed as a novel, efficient, and non-toxic siRNA carrier. SiRNA-Keap1 (siKeap1) was loaded into mEXOs by sonication, and the obtained mEXOs-siKeap1 were found to promote HUVEC proliferation and migration while relieving oxidative stress in MGO-treated HUVECs. Meanwhile, in a mouse model of diabetic wounds, injection of mEXOs-siKeap1 significantly accelerated diabetic wound healing with enhanced collagen formation and neovascularization. Taken together, these data support the development of Keap1 knockdown as a potential therapeutic strategy for diabetic wounds and demonstrated the feasibility of mEXOs as a scalable, biocompatible, and cost-effective siRNA delivery system. Graphical Abstract The therapeutic effect of siKeap1-loaded mEXOs on diabetic wound healing was assessed. First, we found that the expression of Keap1 was upregulated in the wounds of diabetic mice and in human umbilical vein endothelial cells (HUVECs) pretreated with methylglyoxal (MGO). Next, we extracted exosomes from raw milk by differential centrifugation and loaded siKeap1 into milk-derived exosomes by sonication. The in vitro application of the synthetic complex (mEXOs-siKeap1) was found to increase the nuclear localization of Nrf2 and the expression of the antioxidant protein HO-1, thus reversing oxidative stress. Furthermore, in vivo mEXOs-siKeap1 administration significantly accelerated the healing rate of diabetic wounds (Scheme 1). Scheme 1 Schematic diagram. A Synthesis of mEXOs-siKeap1 complex. B Mechanism of mEXOs-siKeap1 in vitro. C The treatment effect of mEXOs-siKeap1 on an in vivo mouse model of diabetic wounds
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Prolonged oxidative stress has been widely recognized as a major instigator in the development of diabetic wounds; therefore, oxidative stress is considered a promising therapeutic target. In the present study, Keap1/Nrf2 signaling was confirmed to be activated in streptozotocin (STZ)-induced diabetic mice and methylglyoxal (MGO)-treated human umbilical vein endothelial cells (HUVECs). Knockdown of Keap1 by siRNA reversed the increase in Keap1 levels, promoted the nuclear translocation of Nrf2, and increased the expression of HO-1, an antioxidant protein. To explore therapeutic delivery strategies, milk-derived exosomes (mEXOs) were developed as a novel, efficient, and non-toxic siRNA carrier. SiRNA-Keap1 (siKeap1) was loaded into mEXOs by sonication, and the obtained mEXOs-siKeap1 were found to promote HUVEC proliferation and migration while relieving oxidative stress in MGO-treated HUVECs. Meanwhile, in a mouse model of diabetic wounds, injection of mEXOs-siKeap1 significantly accelerated diabetic wound healing with enhanced collagen formation and neovascularization. Taken together, these data support the development of Keap1 knockdown as a potential therapeutic strategy for diabetic wounds and demonstrated the feasibility of mEXOs as a scalable, biocompatible, and cost-effective siRNA delivery system. Graphical Abstract The therapeutic effect of siKeap1-loaded mEXOs on diabetic wound healing was assessed. First, we found that the expression of Keap1 was upregulated in the wounds of diabetic mice and in human umbilical vein endothelial cells (HUVECs) pretreated with methylglyoxal (MGO). Next, we extracted exosomes from raw milk by differential centrifugation and loaded siKeap1 into milk-derived exosomes by sonication. The in vitro application of the synthetic complex (mEXOs-siKeap1) was found to increase the nuclear localization of Nrf2 and the expression of the antioxidant protein HO-1, thus reversing oxidative stress. Furthermore, in vivo mEXOs-siKeap1 administration significantly accelerated the healing rate of diabetic wounds (Scheme 1). Scheme 1 Schematic diagram. A Synthesis of mEXOs-siKeap1 complex. B Mechanism of mEXOs-siKeap1 in vitro. 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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><rights>2023. Controlled Release Society.</rights><rights>Controlled Release Society 2023, Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c446t-9dca53a567cd64df9c2c334c8aee083a6f762f683119fee39d1ea1ed0afe99843</citedby><cites>FETCH-LOGICAL-c446t-9dca53a567cd64df9c2c334c8aee083a6f762f683119fee39d1ea1ed0afe99843</cites><orcidid>0000-0003-2828-866X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s13346-023-01306-x$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s13346-023-01306-x$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>230,314,780,784,885,27922,27923,41486,42555,51317</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/36749479$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Xiang, Xuejiao</creatorcontrib><creatorcontrib>Chen, Jing</creatorcontrib><creatorcontrib>Jiang, Tao</creatorcontrib><creatorcontrib>Yan, Chengqi</creatorcontrib><creatorcontrib>Kang, Yu</creatorcontrib><creatorcontrib>Zhang, Maojie</creatorcontrib><creatorcontrib>Xiang, Kaituo</creatorcontrib><creatorcontrib>Guo, Jiahe</creatorcontrib><creatorcontrib>Jiang, Guoyong</creatorcontrib><creatorcontrib>Wang, Cheng</creatorcontrib><creatorcontrib>XiangXu</creatorcontrib><creatorcontrib>Yang, Xiaofan</creatorcontrib><creatorcontrib>Chen, Zhenbing</creatorcontrib><title>Milk-derived exosomes carrying siRNA-KEAP1 promote diabetic wound healing by improving oxidative stress</title><title>Drug delivery and translational research</title><addtitle>Drug Deliv. and Transl. Res</addtitle><addtitle>Drug Deliv Transl Res</addtitle><description>Diabetic wounds are a serious complication of diabetes mellitus (DM) that can lead to persistent infection, amputation, and even death. Prolonged oxidative stress has been widely recognized as a major instigator in the development of diabetic wounds; therefore, oxidative stress is considered a promising therapeutic target. In the present study, Keap1/Nrf2 signaling was confirmed to be activated in streptozotocin (STZ)-induced diabetic mice and methylglyoxal (MGO)-treated human umbilical vein endothelial cells (HUVECs). Knockdown of Keap1 by siRNA reversed the increase in Keap1 levels, promoted the nuclear translocation of Nrf2, and increased the expression of HO-1, an antioxidant protein. To explore therapeutic delivery strategies, milk-derived exosomes (mEXOs) were developed as a novel, efficient, and non-toxic siRNA carrier. 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Next, we extracted exosomes from raw milk by differential centrifugation and loaded siKeap1 into milk-derived exosomes by sonication. The in vitro application of the synthetic complex (mEXOs-siKeap1) was found to increase the nuclear localization of Nrf2 and the expression of the antioxidant protein HO-1, thus reversing oxidative stress. Furthermore, in vivo mEXOs-siKeap1 administration significantly accelerated the healing rate of diabetic wounds (Scheme 1). Scheme 1 Schematic diagram. A Synthesis of mEXOs-siKeap1 complex. B Mechanism of mEXOs-siKeap1 in vitro. 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Res</stitle><addtitle>Drug Deliv Transl Res</addtitle><date>2023-09-01</date><risdate>2023</risdate><volume>13</volume><issue>9</issue><spage>2286</spage><epage>2296</epage><pages>2286-2296</pages><issn>2190-393X</issn><eissn>2190-3948</eissn><abstract>Diabetic wounds are a serious complication of diabetes mellitus (DM) that can lead to persistent infection, amputation, and even death. Prolonged oxidative stress has been widely recognized as a major instigator in the development of diabetic wounds; therefore, oxidative stress is considered a promising therapeutic target. In the present study, Keap1/Nrf2 signaling was confirmed to be activated in streptozotocin (STZ)-induced diabetic mice and methylglyoxal (MGO)-treated human umbilical vein endothelial cells (HUVECs). Knockdown of Keap1 by siRNA reversed the increase in Keap1 levels, promoted the nuclear translocation of Nrf2, and increased the expression of HO-1, an antioxidant protein. 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subjects Animals
Antioxidants - pharmacology
Biomedical and Life Sciences
Biomedicine
Diabetes Mellitus, Experimental - drug therapy
Exosomes - metabolism
Human Umbilical Vein Endothelial Cells - metabolism
Humans
Kelch-Like ECH-Associated Protein 1 - metabolism
Magnesium Oxide - metabolism
Magnesium Oxide - pharmacology
Magnesium Oxide - therapeutic use
Mice
Milk - metabolism
NF-E2-Related Factor 2 - genetics
NF-E2-Related Factor 2 - metabolism
NF-E2-Related Factor 2 - pharmacology
Original
Original Article
Oxidative Stress
Pharmaceutical Sciences/Technology
Pyruvaldehyde - metabolism
Pyruvaldehyde - pharmacology
Pyruvaldehyde - therapeutic use
RNA, Small Interfering - pharmacology
Wound Healing
title Milk-derived exosomes carrying siRNA-KEAP1 promote diabetic wound healing by improving oxidative stress
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