Biomedical subjects

Hideki Hattori

Publications and source records attributed to Hideki Hattori.

6 recordsLinked to original sources

PubMed2006

Detection method for genetically modified papaya using duplex PCR.

A simple and rapid method for the identification of genetically modified (GM) papaya, derived from Line 55-1, was developed by modifying the Japanese official PCR method. Genomic DNA was directly extracted from the fresh fruit without the lyophilization step, using a commercial silica-based kit. To develop a duplex PCR method which simultaneously detects the GM papaya-specific gene and the intrinsic papain gene, the papain 2-5'/3' (amplicon size; 184 bp) primer pair for the detection of the papain gene was newly designed within the region of the products (211 bp) amplified using the papain 1-5'/-3' primer pair adopted in the Japanese official PCR method. To detect the GM papaya-specific gene, the primer pair Nos C-5'/CaM N-3' described in the Japanese official method was used. The DNA sequences of the GM papaya gene and the intrinsic papain gene were co-amplified using the PCR method in a single tube. The developed duplex PCR method allows the simultaneous detection of the products by means of agarose gel electrophoresis or microchip electrophoresis. The proposed method for GM papaya identification is simple and rapid.

Carica↗

PubMed2006

[Detection of short tandem repeat (STR) polymorphisms by microchip electrophoresis for individual identification of cattle].

A simple and rapid detection of short tandem repeat (STR) markers was studied as a screening test for individual identification of cattle. DNAs were extracted from eight commercial beef samples by a proteinase K-boil method followed by purification with 2-propanol precipitation. Five STR markers, known to be highly polymorphic, were amplified by PCR and analyzed both by a conventional sequencing analysis (SEQ) and by a proposed microchip electrophoresis (MEP). Every marker revealed high polymorphism, such as 5-9 alleles in SEQ analysis, and 4-6 alleles in MEP analysis. This simple and rapid MEP analysis is expected to be an effective screening tool with use of confirmatory SEQ analysis.

Animal Identification Systems↗

PubMed2004

Simultaneous determination of barbiturates in human biological fluids by direct immersion solid-phase microextraction and gas chromatography-mass spectrometry.

Simultaneous determination of seven barbiturates in human whole blood and urine by combining direct immersion solid-phase microextraction (DI-SPME) with gas chromatography-mass spectrometry (GC-MS) is presented. The main parameters affecting the DI-SPME process, such as SPME fibers, salt additives, pHs, extraction temperatures and immersion times were optimized for simultaneous determination of the drugs. The extraction efficiencies were 0.0180-0.988 and 0.0156-2.76% for whole blood and urine, respectively. The regression equations of the drugs showed excellent linearity for both samples; the correlation coefficients (r(2)) were 0.994-0.999. The detection limits for whole blood were 0.05-1 microg x ml(-1), and those for urine 0.01-0.6 microg x ml(-1). Actual quantitation could be made for pentobarbital in whole blood and urine obtained from volunteers, who had been orally administered a therapeutic dose of the drug. The DI-SPME/GC-MS procedure for barbiturates established in this study is simple and sensitive enough to be adopted in the fields of clinical and forensic toxicology.

Barbiturates↗

PubMed2003

Sweet's syndrome associated with recurrent fever in a patient with trisomy 8 myelodysplastic syndrome.

In the case of a 69-year-old man suffering from recurrent high fever, laboratory data demonstrated elevated inflammatory findings such as neutrophilic leukocytosis and an increase in serum level of C-reactive protein. A nonsteroidal antiinflammatory drug or a low dose of prednisolone proved to be temporarily effective. A bone marrow specimen showed myelodysplastic syndrome (MDS) of the refractory anemia (RA) type with trisomy 8. Seven months after onset, painful erythematous eruptions were found on both legs. Biopsy of a skin lesion demonstrated neutrophic infiltration into the dermis. As a result, Sweet's syndrome (SS) was diagnosed on the basis of clinical and histopathological findings. Administration of prednisolone (30 mg/d) was started and resulted in prompt defervescence and resolution of the lesions within 1 week. We also investigated serum levels of 3 cytokines: interleukin 1beta (IL-1beta), IL-6, and granulocyte colony-stimulating factor (G-CSF). Levels of IL-6 and G-CSF were elevated during the active phase, but the level of IL-1beta did not increase. Because cases of MDS with trisomy 8 and SS or Behçet disease have been reported recently, our findings suggested that cytokine production, which enhances neutrophil function, is elevated in some MDS patients with trisomy 8; that is, not only cytokines but also trisomy 8 may be related to the pathogenesis of SS in MDS. It is thus advisable to watch for development of SS during follow-up of MDS patients with recurrent fever or trisomy 8.

Aged↗

PubMed2002

Liquid chromatographic-mass spectrometric determination of haloperidol and its metabolites in human plasma and urine.

Haloperidol and its two metabolites, reduced haloperidol and 4-(4-chlorophenyl)-4-hydroxypiperidine (CPHP) in human plasma and urine were analyzed by HPLC-MS using a new polymer column (MSpak GF-310), which enabled direct injection of crude biological samples without pretreatment. Recoveries of haloperidol and reduced haloperidol spiked into plasma were 64.4-76.1% and 46.8-50.2%, respectively; those for urine were 87.3-99.4% and 94.2-98.5%, respectively; those of CPHP for both samples were not less than 92.7%. The regression equations for haloperidol, reduced haloperidol and CPHP showed good linearity in the ranges of 10-800, 15-800 and 400-800 ng/ml, respectively, for both plasma and urine. Their detection limits were 5, 10 and 300 ng/ml, respectively, for both samples. Thus, the present method was sensitive enough for detection and determination of high therapeutic and toxic levels for haloperidol and its metabolites present in biological samples.

Antipsychotic Agents↗

PubMed2002

Comparison of SSI with APCI as an interface of HPLC-mass spectrometry for analysis of a drug and its metabolites.

Sonic spray ionization (SSI) was compared with atmospheric pressure chemical ionization (APCI) as an interface of high-performance liquid chromatography (HPLC)-mass spectrometry (MS) for sensitive analyses of a neuroleptic drug, haloperidol and its two metabolites, such as reduced haloperidol and 4-(4-chlorophenyl)-4-hydroxypiperidine (CPHP), in biological samples. For both SSI and APCI interfaces, HPLC-MS-MS gave higher sensitivity than HPLC-MS. The sensitivities by HPLC-SSI-MS-MS for haloperidol and reduced haloperidol were 100 and 30 times higher, respectively, than those by HPLC-APCI-MS-MS; no spectrum with recognizable peaks was obtained for CPHP with the APCI interface. Therefore, detection limits and regression equations were examined by the HPLC-SSI-MS-MS for human plasma and urine samples spiked with the above drug and its metabolites. Haloperidol, reduced haloperidol, and CPHP showed good linearity in the ranges of 5-800, 10-800, and 100-800 ng/mL, respectively, for both human plasma and urine; their detection limits were 2.5, 5, and 75 ng/mL, respectively, using a new polymer HPLC column which enabled direct application of biological samples.

Antipsychotic Agents↗