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Fujii Y, Ogiwara T, Kato H, Hanaoka Y, Hardian RF, Goto T, Hongo K, Horiuchi T. Cerebral Edema Due to Chemotherapeutic Wafer Implantation for Malignant Glioma: Registry Study of Correlation with Perioperative Epileptic Seizures. Neurol Med Chir (Tokyo) 2022; 62:328-335. [PMID: 35613880 PMCID: PMC9357456 DOI: 10.2176/jns-nmc.2021-0398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Factors predicting adverse events following implantation with wafers containing 1,3-bis (2-chloroethyl) -1-nitrosourea (carmustine, BCNU), which is used in local chemotherapy for malignant gliomas (MGs), are unknown. The association between cerebral edema (CE), which often occurs after implantation, and perioperative seizures, which are often observed in MG cases, is under debate. This study investigated risk factors for CE associated with BCNU wafer implantation and their relationship with perioperative seizures. A total of 31 surgical cases involving 28 adult patients who underwent BCNU wafer implantation for MGs were investigated and classified into those with and without postoperative transient CE. We assessed the correlations between CE caused by BCNU implantation and various factors, including postoperative epileptic seizures. World Health Organization (WHO) grade III MGs significantly affected postoperative CE (p = 0.003) and the occurrence of seizures (p = 0.0004). Factors predictive of postoperative seizures were WHO grade III MGs (p = 0.0026), increased postoperative CE (p = 0.0272), and history of preoperative seizures (p = 0.0316). Postoperative CE, WHO grade III MGs, and a history of preoperative seizures might predict the postoperative occurrence of seizures, necessitating stringent management of seizures and CE in the affected patients.
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Affiliation(s)
- Yu Fujii
- Department of Neurosurgery, School of Medicine, Shinshu University
| | | | - Hiroto Kato
- Department of Neurosurgery, School of Medicine, Shinshu University
| | - Yoshiki Hanaoka
- Department of Neurosurgery, School of Medicine, Shinshu University
| | | | - Tetsuya Goto
- Department of Neurosurgery, School of Medicine, Shinshu University.,Department of Neurosurgery, School of Medicine, St. Marianna University
| | - Kazuhiro Hongo
- Department of Neurosurgery, School of Medicine, Shinshu University.,Department of Neurosurgery, Ina Central Hospital
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Begum SS, Das D, Gour NK, Deka RC. Computational modelling of nanotube delivery of anti-cancer drug into glutathione reductase enzyme. Sci Rep 2021; 11:4950. [PMID: 33654109 PMCID: PMC7925602 DOI: 10.1038/s41598-021-84006-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 06/25/2020] [Indexed: 11/20/2022] Open
Abstract
Density functional theory method combined with docking and molecular dynamics simulations are used to understand the interaction of carmustine with human glutathione reductase enzyme. The active site of the enzyme is evaluated by docking simulation is used for molecular dynamics simulation to deliver the carmustine molecule by (5,5) single walled carbon nanotube (SWCNT). Our model of carmustine in the active site of GR gives a negative binding energy that is further refined by QM/MM study in gas phase and solvent phase to confirm the stability of the drug molecule inside the active site. Once released from SWCNT, carmustine forms multiple polar and non-polar hydrogen bonding interactions with Tyr180, Phe209, Lys318, Ala319, Leu320, Leu321, Ile350, Thr352 and Val354 in the range of 2–4 Å. The SWCNT vehicle itself is held fix at its place due to multiple pi-pi stacking, pi-amide, pi-sigma interactions with the neighboring residues. These interactions in the range of 3–5 Å are crucial in holding the nanotube outside the drug binding region, hence, making an effective delivery. This study can be extended to envisage the potential applications of computational studies in the modification of known drugs to find newer targets and designing new and improved controlled drug delivery systems.
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Affiliation(s)
- Saheen Shehnaz Begum
- Department of Chemical Sciences, Tezpur University, Tezpur, Assam, 784028, India
| | - Dharitri Das
- Department of Chemical Sciences, Tezpur University, Tezpur, Assam, 784028, India
| | - Nand Kishor Gour
- Department of Chemical Sciences, Tezpur University, Tezpur, Assam, 784028, India
| | - Ramesh Chandra Deka
- Department of Chemical Sciences, Tezpur University, Tezpur, Assam, 784028, India.
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Zhang Y, Wang J, Zhang Y, Wei J, Wu R, Cai H. Overexpression of long noncoding RNA Malat1 ameliorates traumatic brain injury induced brain edema by inhibiting AQP4 and the NF-κB/IL-6 pathway. J Cell Biochem 2019; 120:17584-17592. [PMID: 31218751 DOI: 10.1002/jcb.29025] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 04/23/2019] [Accepted: 04/29/2019] [Indexed: 01/20/2023]
Abstract
Brain edema is a major traumatic brain injury (TBI)-related neurological complication. In the initiation stage of TBI, brain edema is characterized by astrocyte swelling (cytotoxic edema). We studied the impact of a long noncoding RNA, Malat1, on the TBI-induced astrocyte swelling and brain edema. Our results showed that Malat1 was downregulated in both the TBI rat model and the astrocyte fluid percussion injury (FPI) model, which concurred with brain edema and astrocyte swelling. Overexpression of Malat1 significantly inhibited rat brain edema, meanwhile reducing interleukin-6 (IL-6), nuclear factor-κB (NF-κB), and aquaporin 4 (AQP4) expression after TBI. In addition, overexpression of Malat1 ameliorated FPI-induced astrocyte swelling and reduced IL-6 release. Quantitative real-time polymerase chain reaction and Western blot analysis also corroborated the inhibitory effects of Malat1 on NF-κB and AQP4 expression after FPI. Our results highlighted the protective effects of Malat1 on the TBI-induced brain edema, which were mediated through regulating IL-6, NF-κB, and AQP4 expression. Our study could provide a novel approach for TBI treatment.
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Affiliation(s)
- Yamin Zhang
- Department of Neurology, Gansu Provincial Hospital, Lanzhou, Gansu, People's Republic of China
| | - Jianping Wang
- Emergency Department, Gansu Provincial Hospital, Lanzhou, Gansu, People's Republic of China
| | - Yi Zhang
- Department of Neurology, Gansu Provincial Hospital, Lanzhou, Gansu, People's Republic of China
| | - Jia Wei
- Youth League Committee, Gansu Provincial Hospital, Lanzhou, Gansu, People's Republic of China
| | - Ruipeng Wu
- Department of Neurology, Gansu Provincial Hospital, Lanzhou, Gansu, People's Republic of China
| | - Hui Cai
- General Surgery Clinical Medicine Center, Gansu Provincial Hospital, Lanzhou, Gansu, People's Republic of China
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Established and Emerging Strategies for Drug Delivery Across the Blood-Brain Barrier in Brain Cancer. Pharmaceutics 2019; 11:pharmaceutics11050245. [PMID: 31137689 PMCID: PMC6572140 DOI: 10.3390/pharmaceutics11050245] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/05/2019] [Accepted: 05/20/2019] [Indexed: 12/25/2022] Open
Abstract
Brain tumors are characterized by very high mortality and, despite the continuous research on new pharmacological interventions, little therapeutic progress has been made. One of the main obstacles to improve current treatments is represented by the impermeability of the blood vessels residing within nervous tissue as well as of the new vascular net generating from the tumor, commonly referred to as blood-brain barrier (BBB) and blood-brain tumor barrier (BBTB), respectively. In this review, we focused on established and emerging strategies to overcome the blood-brain barrier to increase drug delivery for brain cancer. To date, there are three broad strategies being investigated to cross the brain vascular wall and they are conceived to breach, bypass, and negotiate the access to the nervous tissue. In this paper, we summarized these approaches highlighting their working mechanism and their potential impact on the quality of life of the patients as well as their current status of development.
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Zhang Z, Wang X, Li B, Hou Y, Yang J, Yi L. Development of a novel morphological paclitaxel-loaded PLGA microspheres for effective cancer therapy: in vitro and in vivo evaluations. Drug Deliv 2018; 25:166-177. [PMID: 29299936 PMCID: PMC6058517 DOI: 10.1080/10717544.2017.1422296] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Sustained release of therapeutic agents into tumor cells is a potential approach to improve therapeutic efficacy, decrease side effects, and the drug administration frequency. Herein, we used the modified double-emulsion solvent evaporation (DSE) method to prepare a novel morphological paclitaxel (PTX) loaded poly(lactide-co-glycolide) (PLGA) microspheres (MS). The prepared rough PTX-PLGA-MS possessed microporous surface and highly porous internal structures, which significantly influenced the drug entrapment and release behaviors. The rough MS with an average particle size of 53.47 ± 2.87 μm achieved high drug loading (15.63%) and encapsulation efficiency (92.82%), and provided a favorable sustained drug release. The in vitro antitumor tests of flow cytometry and fluoroimmunoassay revealed that the rough PTX-PLGA-MS displayed effective anti-gliomas activity and enhanced the cellular PTX uptake through adsorptive endocytosis. Both in vitro and in vivo antitumor results demonstrated that the sustained-release PTX could induce the microtubules assembly and the over-expression of Bax and Cyclin B1 proteins, resulting in the microtubule dynamics disruption, G2/M phase arrest, and cell apoptosis accordingly. Furthermore, as the rough PTX-PLGA-MS could disperse and adhere throughout the tumor sites and cause extensive tumor cell apoptosis with one therapeutic course (12 days), they could reduce the system toxicity and drug administration frequency, thus achieving significant tumor inhibitory effects with rapid sustained drug release. In conclusion, our results verified that the rough PTX-PLGA-MS drug release system could serve as a promising treatment to malignant glioma.
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Affiliation(s)
- Zongrui Zhang
- a State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , China.,b Biomedical Materials and Engineering Research Center of Hubei Province , Wuhan University of Technology , Wuhan , China
| | - Xinyu Wang
- a State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , China.,b Biomedical Materials and Engineering Research Center of Hubei Province , Wuhan University of Technology , Wuhan , China
| | - Binbin Li
- a State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , China.,b Biomedical Materials and Engineering Research Center of Hubei Province , Wuhan University of Technology , Wuhan , China
| | - Yuanjing Hou
- a State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan , China.,b Biomedical Materials and Engineering Research Center of Hubei Province , Wuhan University of Technology , Wuhan , China
| | - Jing Yang
- c School of Foreign Languages , Wuhan University of Technology , Wuhan , China
| | - Li Yi
- d Institute of Textiles and Clothing , The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong , P.R. China
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Nakae S, Murayama K, Adachi K, Kumai T, Abe M, Hirose Y. Novel Application of Time-Spatial Labeling Inversion Pulse Magnetic Resonance Imaging for Diagnosis of External Hydrocephalus. World Neurosurg 2018; 109:197-201. [DOI: 10.1016/j.wneu.2017.09.175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 09/23/2017] [Accepted: 09/25/2017] [Indexed: 12/01/2022]
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