Search

Yuying Zhao,1 Hanxu Tan,2 Juping Zhang,1,3 Bo Pan,1 Neng Wang,2 Tongkai Chen,4 Yafei Shi,1,2 Zhiyu Wang1,3,5 1State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, People’s Republic of China; 2The Research Center for Integrative Medicine, School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, People’s Republic of China; 3Guangdong-Hong Kong-Macau Joint Laboratory on Chinese Medicine and Immune Disease Research, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, People’s Republic of China; 4Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, People’s Republic of China; 5Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangdong Provincial Hospital of Chinese Medicine, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, Guangdong, People’s Republic of ChinaCorrespondence: Zhiyu Wang; Yafei Shi, Email wangzhiyu@gzucm.edu.cn; shiyafei@gzucm.edu.cnAbstract: Lipid-structured vesicles have been applied for drug delivery system for over 50 years. Based on their origin, lipid-structured vesicles are divided into two main categories, namely synthetic lipid vesicles (SLNVEs) and vesicles of mammalian origin (MDVEs). Although SLNVEs can stably transport anti-cancer drugs, their biocompatibility is poor and degradation of exogenous substances is a potential risk. Unlike SLNVEs, MDVEs have excellent biocompatibility but are limited by a lack of stability and a risk of contamination by dangerous pathogens from donor cells. Since the first discovery of plant-derived vesicles (PDVEs) in carrot cell supernatants in 1967, emerging evidence has shown that PDVEs integrate the advantages of both SLNVEs and MDVEs. Notably, 55 years of dedicated research has indicated that PDVEs are an ideal candidate vesicle fo

Yousheng Mo,1,* Wei Liu,2,* Piaoxue Liu,2 Qiao Liu,3 Zhongyu Yuan,4 Qi Wang,2 Dongsheng Yuan,2 Xiao-Jia Chen,3 Tongkai Chen2 1The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, People’s Republic of China; 2Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, People’s Republic of China; 3State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, 999078, People’s Republic of China; 4Department of Medical Oncology, Sun Yat-Sen University Cancer Center, the State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, 510060, People’s Republic of China*These authors contributed equally to this workCorrespondence: Xiao-Jia Chen; Tongkai Chen, Email xiaojiachen@um.edu.mo; chentongkai@gzucm.edu.cnBackground: Breast cancer (BC) has the highest global prevalence among all malignancies in women and the second highest prevalence in the overall population. Paclitaxel (PTX), a tricyclic diterpenoid, is effective against BC. However, its poor solubility in water and the allergenicity of its dissolution medium limited its clinical application.Methods: In this work, we established a multifunctional graphene oxide (GO) tumor-targeting drug delivery system using nanosized graphene oxide (nGO) modified with D-tocopherol polyethylene glycol succinate (TPGS) and arginine-glycine-aspartic acid (RGD) for PTX loading.Results: The obtained RGD-TPGS-nGO-PTX was 310.20± 19.86 nm in size; the polydispersity index (PDI) and zeta potential were 0.21± 0.020 and − 23.42 mV, respectively. The mean drug loading capacity of RGD-TPGS-nGO-PTX was 48.78%. RGD-TPGS-nGO-PTX showed satisfactory biocompatibility and biosafety and had no significant toxic effects on zebrafish embryos. Importantly, it exerted excellent cytotoxicity against MDA-MB

Cong Yang,1,* Mengmeng Han,1,2,* Ruoyu Li,1,* Ligui Zhou,1,3 Ying Zhang,1,2 Lining Duan,1,4 Shiyu Su,1,4 Min Li,1,4 Qi Wang,1 Tongkai Chen,1,* Yousheng Mo5,* 1Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, People’s Republic of China; 2The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, People’s Republic of China; 3Laboratory Animal Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, People’s Republic of China; 4Clinical Medical College of Acupuncture Moxibustion and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, 510405, People’s Republic of China; 5The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, People’s Republic of China*These authors contributed equally to this workCorrespondence: Tongkai Chen; Yousheng Mo Email chentongkai@gzucm.edu.cn; 378480308@qq.comBackground: Intracerebral hemorrhage (ICH) is a form of severe stroke, the pathology of which is tied closely to a recently discovered form of programmed cell death known as ferroptosis. Curcumin (Cur) is a common phenolic compound extracted from the rhizome of Curcuma longa capable of hematoma volume and associated neurological damage in the context of ICH. Despite exhibiting therapeutic promise, the efficacy of Cur is challenged by its poor water solubility, limited oral bioavailability and inability to efficiently transit across the physiological barriers. Polymer-based nanoparticles (NPs) have widely been employed to aid in drug delivery efforts owing to their ideal biocompatibility and their ability to improve the bioavailability and pharmacokinetics of specific drugs of interest.Methods: In this study, we encapsulated Cur in NPs (Cur-NPs) and explored the effect of these Cur-NPs to enhance Cur delivery both in vitro and in vivo. Furthermore, we evaluated the anti-ferropto

Yuying Zhao,1 Sha Xiong,1 Piaoxue Liu,1 Wei Liu,1 Qun Wang,1 Yao Liu,1 Hanxu Tan,2 Xiaojia Chen,3 Xuguang Shi,4 Qi Wang,1 Tongkai Chen1 1Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou 510405, People’s Republic of China; 2Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, People’s Republic of China; 3State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, People’s Republic of China; 4School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, People’s Republic of ChinaCorrespondence: Tongkai Chen; Qi WangScience and Technology Innovation Center, Guangzhou University of Chinese Medicine, 12 Jichang Road, Guangzhou 510405, People’s Republic of ChinaEmail chentongkai@gzucm.edu.cn; wangqi@gzucm.edu.cnPurpose: Ginkgolide B (GB) is a terpene lactone derivative of Ginkgo biloba that is believed to function in a neuroprotective manner ideal for treating Parkinson’s disease (PD). Despite its promising therapeutic properties, GB has poor bioavailability following oral administration and cannot readily achieve sufficient exposure in treated patients, limiting its clinical application for the treatment of PD. In an effort to improve its efficacy, we utilized poly(ethylene glycol)-co-poly(ϵ-caprolactone) (PEG-PCL) nanoparticles as a means of encapsulating GB (GB-NPs). These NPs facilitated the sustained release of GB into the blood, thereby improving its ability to accumulate in the brain and to treat PD.Methods and Results: Using Madin-Darby canine kidney (MDCK) cells, we were able to confirm that these NPs could be taken into cells via multiple nonspecific mechanisms including micropinocytosis, clathrin-dependent endocytosis, and lipid raft/caveolae-mediated endocytosis. Once internalized, these NPs tended to accumulate in the endopl

Microglia-mediated neuroinflammatory responses are inevitable and important pathological processes in several kinds of disorder of the central nervous system (CNS). Therefore, alleviating activated microglia-induced inflammatory process might be a valuable therapeutic approach to neuroinflammation-related diseases. In the present study, we investigated BHDPC, a novel neuroprotectant discovered in our previous study that had anti-inflammatory effects under neuroinflammatory conditions. First, we found that BHDPC could inhibit neuroinflammatory responses and promote microglial M2 phenotype polarization in both lipopolysaccharide (LPS)-activated BV-2 microglia l cells. Furthermore, BHDPC provided protective actions against neuroinflammation-induced neurotoxicity in HT22 mouse hippocampal cells co-cultured with activated BV-2 microglia. Further experiments demonstrated that BHDPC could suppress LPS-induced activation of transcription factor nuclear factor kappa B (NF-κB) via interfering with the degradation of the inhibitor of kappa B (IκB) and phosphorylation of IκB, the IκB kinase (IKK). Moreover, we also found that BHDPC could induce phosphorylation of cAMP-dependent protein kinase A (PKA) and cAMP-response element-binding protein (CREB) in BV-2 microglial cells. Also, using the PKA-specific inhibitor, we found that BHDPC-induced CREB phosphorylation was dependent on PKA, which also contributed to BHDPC-mediated anti-inflammation and neuroprotection.