Highly sensitive quantification of key regulatory oxysterols in biological samples by LC-ESI-MS/MS

Akira Honda, Kouwa Yamashita, Takashi Hara, +6

Journal of Lipid Research

Highly sensitive analysis of sterol profiles in human serum by LC-ESI-MS/MS

Akira Honda, Kouwa Yamashita, Hiroshi Miyazaki, +6

Journal of Lipid Research

Lipid AnalysisSensitive AnalysisPathologyAvailable SterolsLumen-apposing Metal Stent +16

Highly sensitive determination of estrone and estradiol in human serum by liquid chromatography–electrospray ionization tandem mass spectrometry

Kouwa Yamashita, Mitsunobu Okuyama, Yoko Watanabe, +3

Steroids

MedicineBioanalysisMass SpectrometryGynecologyLiquid Chromatography–electrospray Ionization +9

Development of highly sensitive quantification method for testosterone and dihydrotestosterone in human serum and prostate tissue by liquid chromatography–electrospray ionization tandem mass spectrometry

Kouwa Yamashita, Yoshimichi Miyashiro, Hitoe Maekubo, +4

Steroids

UrologyAndrologyMedicineProstate TissueBioanalysis +10

Highly sensitive quantification of 7α-hydroxy-4-cholesten-3-one in human serum by LC-ESI-MS/MS

Akira Honda, Kouwa Yamashita, Mitsuteru Numazawa, +4

Journal of Lipid Research

Bile Acid BiosynthesisEngineeringImmunologyPathologyGas Chromatography +17

Gastric Parietal Cells: Potent Endocrine Role in Secreting Estrogen as a Possible Regulator of Gastro-Hepatic Axis

Takashi Ueyama, Nobuyuki Shirasawa, Mitsuteru Numazawa, +4

Endocrinology

GastroenterologyGynecologyOvarian CancerGastrointestinal Peptide HormonePotent Endocrine Role +20

Synthesis of pyridine-carboxylate derivatives of hydroxysteroids for liquid chromatography–electrospray ionization-mass spectrometry

Kouwa Yamashita, Sayuri Kobayashi, Satoshi Tsukamoto, +1

Steroids

Derivative (Chemistry)EngineeringPyridine-carboxylate DerivativesMedicineMass Spectrometry +8

Use of novel picolinoyl derivatization for simultaneous quantification of six corticosteroids by liquid chromatography-electrospray ionization tandem mass spectrometry

Kouwa Yamashita, Madoka Takahashi, Satoshi Tsukamoto, +3

Journal of Chromatography A

BiochemistryNovel Picolinoyl DerivatizationMedicineDrug DiscoveryMass Spectrometry +8

Highly sensitive and specific analysis of sterol profiles in biological samples by HPLC–ESI–MS/MS

Akira Honda, Teruo Miyazaki, Tadashi Ikegami, +4

The Journal of Steroid Biochemistry and Molecular Biology

Lipid AnalysisEngineeringOxysterolMedicineBioanalysis +10

Stereospecific synthesis of 16.alpha.-hydroxy-17-oxo steroids by controlled alkaline hydrolysis of corresponding 16-bromo-17-ketones and its reaction mechanism

Mitsuteru Numazawa, Masao Nagaoka, Yoshio Osawa

The Journal of Organic Chemistry

Steroid MetabolismBioorganic ChemistryEngineeringBiochemistryNatural Sciences +12