Biomedical subjects
Publications and source records attributed to Satoru Yoshida.
A new cytotoxic diterpene, (Z)-sarcodictyin A, was isolated from the Japanese soft coral Bellonella albiflora.(1) Its structure was elucidated on the basis of 1D and 2D NMR analysis and chemical degradation. (Z)-Sarcodictyin A showed strong cytotoxicity against HeLa human cervix cells.
Explore the source record for details and available documents.
We report the effects and toxicities of intravenous administration of cisplatin, 5-FU and high-dose leucovorin for advanced esophageal cancer. Eight patients were registered and sixteen lesions were measurable. Of these sixteen lesions, thirteen were primary or synchronous metastatic lesions, and the response was 69%. Three were recurrence lesions, and the response rate for them was 0%. Including seven neoadjuvant cases, ten patients had oral mucositis, and seven patients had appetite loss. Other toxicities were diarrhea, myelosuppression, renal dysfunction, and alopecia. All were reversible after administration. It is suggested that this treatment regimen is a superior neoadjuvant chemotherapy with low toxicity.
Explore the source record for details and available documents.
Using cDNA-based array analysis combined with double-stranded RNA interference (dsRNAi), we have identified yk298h6 as a target gene of Caenorhabditis elegans TGF-beta signaling. Worms overexpressing dbl-1, a TGF-beta ligand, are 16% longer than wild type. Array analysis shows yk298h6 to be one of several genes suppressed in such worms. Disruption of yk298h6 function by dsRNAi also resulted in long worms, suggesting that it is a negative regulator of body length. yk298h6 was then mapped to, and shown to be identical to, lon-1, a known gene that affects body length. lon-1 encodes a 312 amino acid protein with a motif sequence that is conserved from plants to humans. Expression studies confirm that LON-1 is repressed by DBL-1, suggesting that LON-1 is a novel downstream component of the C.elegans TGF-beta growth regulation pathway. Consistent with this, LON-1 is expressed mainly in the larval and adult hypodermis and has dose-dependent effects on body length associated with changes in hypodermal ploidy, but not hypodermal cell proliferation.
Explore the source record for details and available documents.
Explore the source record for details and available documents.