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Articles by S Morita
Total Records ( 6 ) for S Morita
  S Ohsumi , K Shimozuma , S Morita , F Hara , D Takabatake , S Takashima , N Taira , K Aogi and S. Takashima

To determine if health-related quality-of-life (QOL) differences existed between breast cancer (BC) survivors receiving mastectomy and those receiving breast-conserving treatment (BCT). Factors associated with QOL in long-term BC survivors were also identified.


One hundred patients who had previously undergone BC surgery and were alive without recurrence for >5 years were asked to answer the patient-administered questionnaires to assess their QOL (Functional Assessment of Cancer Therapy scale-Breast: FACT-B) and psychological distress (Hospital Anxiety and Depression Scale: HADS). Of them, 93 responded to the questionnaires affirmatively.


Although none of the QOL scores were related to the surgical procedures, statistically significant relationships were found between age and the scores of FACT-General and social/family well-being (SWB), and between the educational status and scores of SWB in univariate analyses. There was no statistically significant relationship between psychological distress and each factor examined. In multivariate analyses, significant correlations were established between scores of the FACT-BC subscale (FACT-BCS) and the type of surgery and between those on the FACT SWB subscale and age at study or educational status. Namely, patients who had undergone BCT, younger patients and patients with higher educational background scored higher QOL.


Among the BC survivors, those who underwent BCT experienced significantly but slightly better QOL than those who received mastectomy in FACT-BCS assessments. Younger patients and patients with higher educational backgrounds experienced significantly better SWB.

  T Kono , H Mishima , M Shimada , S Morita , J Sakamoto and for the GONE investigators

We conducted a controlled double-blind randomized study in patients with advanced/recurrent colorectal cancer to investigate the efficacy of Goshajinkigan (GJG) for peripheral neurotoxicity induced by FOLFOX therapy. The primary endpoint is the incidence of peripheral neurotoxicity ≥Grade 2 after eight cycles of chemotherapy. The secondary endpoints are the incidence of peripheral neurotoxicity of each grade after each cycle, the psychometric properties of the FACT/GOG-Ntx, time to occurrence of neurotoxicity, time to treatment failure, progression-free survival, response rate and toxicity. Eighty patients are required in the study (40 patients per group).

  T Yoshikawa , A Tsuburaya , S Morita , Y Kodera , S Ito , H Cho , Y Miyashita and J. Sakamoto

This randomized Phase II trial compares neoadjuvant chemotherapy of two or four courses of S-1 (1 M tegafur–0.4 M gimestat–1 M ostat potassium) plus cisplatin or paclitaxel plus cisplatin by a two-by-two factorial design for patients with macroscopically resectable locally advanced gastric cancer. The primary endpoint is the 3-year overall survival. The sample size is 60–80 in a total for two hypotheses of the superiority of four courses to two courses and the superiority of paclitaxel plus cisplatin to S-1 plus cisplatin. In both arms, S-1 is strongly recommended post-operatively for at least 6 months but no adjuvant chemotherapy is permitted other than S-1 until recurrence. This trial could appraise more suitable cycles and regimen as neoadjuvant chemotherapy for gastric cancer.

  T Ishikawa , D Shimizu , T Sasaki , S Morita , M Tanabe , I Ota , K Kawachi , A Nozawa , T Chishima , Y Ichikawa , I Endo and H. Shimada

We investigated the pathological effects of neoadjuvant chemotherapy based on the human epidermal growth factor receptor 2 in operable breast cancer.


This prospective clinical study was a pilot involving 63 female patients. Before surgery, patients with tumors overexpressing human epidermal growth factor receptor 2 received four cycles of 60 mg/m2 anthracycline and 600 mg/m2 cyclophosphamide every 3 weeks, whereas those whose tumors did not overexpress human epidermal growth factor receptor 2 received four cycles of 75 mg/m2 docetaxel and 600 mg/m2 cyclophosphamide every 3 weeks. A quasi-pathological complete response (i.e. absence of invasive tumor or only focal residual tumor cells) was the primary endpoint, with compliance and predictors for each regimen as secondary endpoints. If a quasi-pathological complete response was not achieved, then crossover to the alternative treatment was recommended.


The quasi-pathological complete response rate was 36.5% (23 of 63) overall, 27.8% (5 of 18) for the anthracycline and cyclophosphamide regimen and 40.0% (18 of 45) for the docetaxel and cyclophosphamide regimen. Docetaxel and cyclophosphamide treatment induced a quasi-pathological complete response in most patients with triple-negative tumors (15 of 19). The relative dose intensity was 97.3% for the anthracycline and cyclophosphamide regimen and 96.6% for the docetaxel and cyclophosphamide regimen. Quasi-pathological complete response to the docetaxel and cyclophosphamide regimen was associated with low estrogen receptor and progesterone receptor expression and high MIB-1 and topoisomerase II expression, in univariate analyses, but only with low estrogen receptor expression in multivariate analysis.


Selecting neoadjuvant chemotherapy regimens on the basis of individual human epidermal growth factor receptor 2 status improved efficacy, with docetaxel and cyclophosphamide treatment showing particular promise in tumors with the potential to be highly malignant.

  M Kawahara , S Morita , N Takahashi and T. Kono

Parental genome functions in ontogeny are determined by interactions among transcripts from the maternal and paternal genomes, which contain many genes whose expression is strictly dependent on their parental origin as a result of genomic imprinting. Comprehensive recognition of the interactions between parental genomes is important for understanding genomic imprinting in mammalian development. The placenta is a key organ for exploring the biological significance of genomic imprinting. To decipher the unknown roles of paternally methylated imprinted genes on chromosomes 7 and 12 in mouse placentation, we performed a transcriptomic analysis on placentae in three types of bimaternal conceptuses that contained genomes derived from both non-growing and fully grown oocytes. Furthermore, we used the Ingenuity pathway analysis software to predict key networks and identify functions specific to paternally methylated imprinted genes regulated by the Igf2-H19 imprinting control region and Dlk1-Dio3 imprinting control region. The data suggested that dynamic conversion of the gene expression profile by restoring the expression of paternally methylated imprinted genes resulted in phenotypic improvements in bimaternal placentae. These results provide a framework to further explore the role of epigenetic modifications in paternal genome during mouse placentation.

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