- 著者
- Hitoshi Sasaki
- 出版者
- The Pharmaceutical Society of Japan
- 雑誌
- Biological and Pharmaceutical Bulletin (ISSN:09186158)
- 巻号頁・発行日
- vol.43, no.8, pp.1147-1153, 2020-08-01 (Released:2020-08-01)
- 参考文献数
- 64
- 被引用文献数
- 2
Gene and nucleic medicines have recently gained attention as novel drugs with the advancement of molecular biology and genetics; however, they have low bioavailability and low target delivery due to their low stability and poor membrane permeability. Therefore, the development of an effective drug delivery system (DDS) is necessary for the practical use of gene and nucleic acid medicines; however, despite considerable research, both safety and efficiency remain poor. Furthermore, the healthcare needs are not met by traditional DDS. Therefore, we developed an effective multi-functional DDS, which is constructed using materials that are safe for human consumption. This DDS involves several ternary complexes as novel gene delivery carriers constructed by coating the cationic complex of the gene and nucleic acid medicines as well as the biodegradable cationic polymer with a biocompatible anionic polymer. Early implementation of the ternary complex in clinical studies is expected due to their efficacy and safety. Furthermore, these complexes may be prepared using large-scale manufacturing. In addition, personalized DDS may be prepared according to the patient’s disease stage, which is useful for advanced therapy.
- 著者
- Junya Hashizume Norihide Higuchi Kayoko Sato Yukinobu Kodama Noriko Matsunaga Toshiaki Sakamoto Kentaro Yamaguchi Tadahiro Nakamura Takashi Kitahara Hitoshi Sasaki
- 出版者
- 公益社団法人日本薬学会
- 雑誌
- Biological and Pharmaceutical Bulletin (ISSN:09186158)
- 巻号頁・発行日
- vol.39, no.4, pp.611-614, 2016-04-01 (Released:2016-04-01)
- 参考文献数
- 21
Antiemetic prophylaxis with aprepitant, a 5-hydroxytryptamine3 (5-HT3) receptor antagonist and dexamethasone is recommended for patients receiving intravenous cisplatin chemotherapy. Whether the same antiemetic regime is superior for hepatic transcatheter arterial infusion chemotherapy with cisplatin (CDDP-TAI) is unknown. We conducted a retrospective study of antiemetic prophylaxis protection against chemotherapy-induced nausea and vomiting (CINV) in CDDP-TAI at Nagasaki University Hospital. The rate of complete response (CR) to antiemetics in the acute (<24 h) and delayed phases (24–120 h) was measured. Twenty-four patients were treated with a 5-HT3 receptor antagonist (granisetron or azasetron) and dexamethasone on the day of chemotherapy (day 1 only). There was a significant difference between the CR rates in the acute and delayed phases, 91.6, and 69.7%, respectively. Combination of a 5-HT3 antagonist and dexamethasone on day 1 is effective against acute CINV, but not delayed CINV during CDDP-TAI. These results may help guide the management of nausea and vomiting during CDDP-TAI to achieve better tolerance and compliance for fewer interventions and increased favorable therapeutic outcomes.
- 著者
- Takashi Kitahara Nao Koyama Junichi Matsuda Yuko Aoyama Yoichi Hirakata Shimeru Kamihira Shigeru Kohno Mikiro Nakashima Hitoshi Sasaki
- 出版者
- The Pharmaceutical Society of Japan
- 雑誌
- Biological and Pharmaceutical Bulletin (ISSN:09186158)
- 巻号頁・発行日
- vol.27, no.9, pp.1321-1326, 2004 (Released:2004-09-01)
- 参考文献数
- 36
- 被引用文献数
- 78 92
The objective of this study was to investigate the antimicrobial activities of saturated fatty acids and fatty amines against methicillin-resistant Staphylococcus aureus (MRSA). The antimicrobial activity of saturated fatty acids and fatty amines was determined by oxygen meters with multi-channels and disposable oxygen electrode sensors (DOX-96). Lauric acid, the most effective among the saturated fatty acids, showed antimicrobial activity at 400 μg/ml against methicillin-susceptible Staphylococcus aureus (MSSA) and MRSA. The minimal inhibitory concentration (MIC) of fatty amines depended on each hydrophobic chain length. The MIC of myristylamine was 1.56 μg/ml; most effective of the fatty amines. In time-kill curves, lauric acid and myristylamine produced a bactericidal effect and a bacteriostatic effect at 4-fold the MIC, respectively. The antimicrobial activities of lauric acid and myristylamine were decreased by human plasma. Cytotoxicity of 3 saturated fatty acids and 3 fatty amines was examined in cultured endothelial cells. Although cytotoxicity of fatty amines was severer than that of saturated fatty acids, myristylamine showed the highest value of apparent therapeutic index among them. DOX-96 was useful for screening antimicrobial substances, especially in the case of insoluble substances. We found that myristylamine showed anti-MRSA activity comparable to that of vancomycin and teicoplanin.
- 著者
- Kouji WADA Hitoshi SASAKI Mitsuya SHIMODA Yutaka OSAJIMA
- 出版者
- Japan Society for Bioscience, Biotechnology, and Agrochemistry
- 雑誌
- Agricultural and Biological Chemistry (ISSN:00021369)
- 巻号頁・発行日
- vol.51, no.7, pp.1753-1760, 1987 (Released:2006-04-05)
- 参考文献数
- 17
- 被引用文献数
- 4
The aroma profiles of 39 coffee samples (32 arabica and 7 robusta coffees) were evaluated objectively by the coupling of gas chromatographic analysis and two kinds of multivariate analysis (principal component analysis and cluster analysis) and compared with the classification on the basis of a cup test of brewed coffee by cup testers. Robusta coffees were separated from arabica coffees by principal component analysis (PCA) and cluster analysis. Using PCA of only 32 arabica coffee samples, their aroma profiles could be characterized on the first and second principal components. The components responsible for grassy aroma and earthy odor, respectively, were clarified from the factor loadings obtained by PCA. Furthermore, 32 arabica coffees were divided into seven clusters by cluster analysis of the first and second principal components obtained by PCA. Consequently, 39 coffee samples were classified into eight groups and the result was consistent with the classification on the basis of sensory evaluation except for two samples.