Biomedical subjects

Chikako Fujita

Publications and source records attributed to Chikako Fujita.

6 recordsLinked to original sources

PubMed2006

Establishment of three malignant peripheral nerve sheath tumor cell lines, FU-SFT8611, 8710 and 9817: conventional and molecular cytogenetic characterization.

Malignant peripheral nerve sheath tumor (MPNST) is a rare malignant tumor, for which only a few cultured cell lines are available to date. In the present study, we established three new MPNST cell lines, FU-SFT8611, FU-SFT8710 and FU-SFT9817, from a 40-year-old Japanese man without neurofibromatosis 1 (NF1), a 43-year-old Japanese woman with NF1, and a 61-year-old Japanese woman without NF1, respectively. These cell lines were in culture for more than 3 years in vitro, and exhibit complex karyotypes lacking a common characteristic pattern. Two of the cell lines, FU-SFT8611 and FU-SFT9817, were tumorigenic in nude mice, with the resultant tumors showing an immunohistochemical phenotype similar to the original tumors. Comparative genomic hybridization analysis revealed that chromosomal imbalances were very similar between the original tumors and the established cell lines, but no consistent imbalances among the three cell lines as reported so far. As for chromosomal imbalances that have been reported to be associated with poor survival, FU-SFT8611 exhibited a gain of chromosome 17q22-qter, and FU-SFT9817 showed a loss of 17q22-qter, while gains of 17q24 and 7p15-p21 were observed in none of the cell lines. These newly established cell lines provide a valuable resource for biological and pathological investigations into new treatment regimes for MPNST.

Adult↗

PubMed2004

Development of a telerehabilitation system for training physiotherapists in rural areas.

The purpose of this study was to assess the effectiveness of transmitting moving pictures via the Internet for processing by a three-dimensional motion analyser. The movements of two patients were filmed by a videocamera and transmitted from a hospital to a university department of physiotherapy. After advanced analysis using a three-dimensional motion analyser, physiotherapists prepared a treatment plan. The transmitted moving pictures were clear enough for analysis. The physiotherapists in the hospital were satisfied with the results of the motion analysis and found the guidance from an expert physiotherapist valuable. In the future, a large number of video-sequences could be transmitted during the night, stored at the university and then analysed later by an expert physiotherapist.

Education, Distance↗

PubMed2004

A pilot study of physiotherapy education using videoconferencing.

We investigated the possibility of instructing people in how to assist patients with activities of daily living via videoconferencing. A videoconference system was installed in two rooms to simulate a connection between a home and an institution. The subjects were five first-year university students. First, they saw a video-tape on several general assistance procedures to help a patient with sitting up, standing up and walking with a cane. Then they assisted a simulated patient who reproduced the effects of right hemiplegia due to a stroke. They also received instructions from a physiotherapist in another room using the videoconference system. The students experienced most difficulty in assisting the patient to stand up from sitting with legs stretched in a tatami room. Their mean score in the first session for this was 34.5 points out of 45, and this increased to 38.5 in a second session, after a question and answer period. The present study shows that the delivery of rehabilitation services is feasible in remote places.

Activities of Daily Living↗

PubMed2003

Establishment of a novel human dedifferentiated liposarcoma cell line, FU-DDLS-1: conventional and molecular cytogenetic characterization.

A number of human cell lines derived from well-differentiated, myxoid/round cell, or pleomorphic liposarcoma have been described. To our knowledge, however, no human cell line established from dedifferentiated liposarcoma has been reported. In this study, we established a new human cell line, FU-DDLS-1, which originated from a dedifferentiated liposarcoma arising in the retroperitoneum of a 61-year-old man. This cell line was characterized by immunocytochemistry, conventional banding analysis, fluorescence in situ hybridization with chromosome painting probe, and comparative genomic hybridization (CGH). FU-DDLS-1 cells were spindle or polygonal shaped and possessed oval nuclei and slender cytoplasmic processes. The cultured cells were successfully maintained in vitro for over 90 passages over more than 30 months. The histologic features of heterotransplanted tumors in severe combined immunodeficiency mice were essentially the same as those of the original nonlipogenic sarcoma resembling a malignant fibrous histiocytoma. Both in vitro and in vivo, the cells exhibited immunopositive reaction for mdm2 and p53 proteins. Cytogenetically, FU-DDLS-1 displayed a hypertetraploid karyotype with giant marker chromosomes composed partly of chromosome 12 material. In addition, CGH analysis demonstrated that DNA sequence copy number changes including a gain of 12q12-q21 detected in FU-DDLS-1 were essentially the same as those in the original sarcoma. The FU-DDLS-1 cell line, which exhibits the unique conventional and molecular cytogenetic characteristics of dedifferentiated liposarcoma, should be a particularly useful model for studying the molecular pathogenesis of human dedifferentiated liposarcoma.

Aneuploidy↗

PubMed2002

Establishment and characterization of a novel human desmoplastic small round cell tumor cell line, JN-DSRCT-1.

The exact nature of the desmoplastic small round cell tumor (DSRCT) remains controversial. More detailed analyses might be facilitated by the establishment of permanent DSRCT cell lines. To date, however, no human DSRCT cell line has been reported. In this study, we report the establishment of a new human cell line, JN-DSRCT-1, from the pleural effusion of a 7-year-old boy with pulmonary metastasis from a typical intra-abdominal DSRCT. JN-DSRCT-1 cells were small round or spindle shaped with oval nuclei and have been maintained continuously in vitro for over 190 passages during more than 40 months. Histologic features of the heterotransplanted tumors in severe combined immunodeficiency mouse were essentially the same as those of the original DSRCT, revealing nests or clusters of small round cells embedded in an abundant desmoplastic stroma. Both in vitro and in vivo, the cells exhibited immunopositive reactions for vimentin, desmin, cytokeratins (AE1/AE3 and CAM 5.2), epithelial membrane antigen, neuron-specific antigen, and CD57 (Leu-7). JN-DSRCT-1 cells exhibited a pathognomonic t(11;22)(p13;q12) translocation by cytogenetic analysis. In addition, RT-PCR and sequencing analysis revealed a chimeric transcriptional message of the Ewing's sarcoma gene exon 10 fused to the Wilms' tumor gene exon 8. To our knowledge, this is the first permanent human DSRCT cell line. The JN-DSRCT-1 cell line, which exhibits the unique morphologic and genetic characteristics of DSRCT, will be extremely useful for a variety of important studies such as the pathogenic mechanism, biologic behavior, and therapeutic model of human DSRCT.

Abdominal Neoplasms↗

PubMed2002

Establishment of a new human synovial sarcoma cell line, FU-SY-1, that expresses c-Met receptor and its ligand hepatocyte growth factor.

Only a small number of human synovial sarcoma cell lines have been reported, and of those, not all have been fully characterized, especially at the molecular level. We describe here the establishment and characterization of a new human cell line, FU-SY-1, which originated from a monophasic fibrous synovial sarcoma arising in the supinator muscle of a 31-year-old woman. This cell line propagated continuously in vitro for 73 serial passages for more than 36 months. FU-SY-1 cells in vitro were rather small, exhibited a spindle or polygonal shape without conspicuous pleomorphism, and expressed c-Met and hepatocyte growth factor (HGF) as determined by immunocytochemistry. Cytogenetically, FU-SY-1 cells maintained a consistent karyotype: 47, X, +7, t(X;18)(p11.2;q11.2), the same as that of the original tumor specimen. Reverse transcriptase-polymerase chain reaction (RT-PCR) demonstrated a SYT-SSX fusion transcript and expression of c-Met and HGF mRNA in FU-SY-1 cells. A subsequent sequence analysis using the PCR products confirmed that the detected messages were derived from the SYT-SSX1 fusion gene. This cell line, FU-SY-1, established from a monophasic fibrous synovial sarcoma, may therefore be a useful tool for investigation of the mechanisms of tumorigenesis and progression in human synovial sarcomas.

Adult↗