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T Ogino

Publications and source records attributed to T Ogino.

At least 73 records · Page 4Linked to original sources
PubMed2000

[Prognostic factors in non-Hodgkin's lymphoma of Waldeyer's ring and the lymph nodes of the neck].

Prognostic factors and treatment outcome of 74 patients with non-Hodgkin's lymphoma of Waldeyer's ring (male 34, female 16, median age 63 years) and cervical lymph nodes (male 17, female 7, median age 62 years) were analyzed retrospectively. The prognostic factors analyzed were: age, B-symptoms, serum LDH levels, and Ann Arbor stage. We also analysed the TNM classification (1987) of Waldeyer's ring lymphoma (previously referred as nasopharyngeal and oropharyngeal cancer) as a new prognostic factor. The 5-year-survival rate of the patients with Waldeyer's ring non-Hodgkin's lymphoma was 67%, compared with 34% for cervical lymph node lymphoma. In univariate analyses, unfavorable outcome was associated with age (age > 60 years), B-symptoms, elevated serum LDH level, and stage. Multivariate analysis showed that age and elevated serum LDH level were significant independent risk factors for death. The 5-year-survival rate according to TNM classification of Waldeyer's ring lymphoma was: T1 (4 cases) 75%, T2 (23 cases) 83%, T3 (10 cases) 56%, T4 (4 cases) 0%; according to N stage, N0 (15 cases) 91%, N1 (7 cases) 73%, N2 (11 cases) 55%, N3 (5 cases), M1 (3 cases) 0%, and according to TNM stage, stage I (one case) stage II (9 cases) 100%, stage III (12 cases) 80%, stage IV (19 cases) 34%. These results suggest that the N classification of Waldeyer's ring non-Hodgkin's lymphoma may be a new prognostic factor.

Age Factors↗
PubMed2000

Effects of superior colliculus inhibition on visual motion processing in the lateral suprasylvian visual area of the cat.

PURPOSE: To clarify whether visual inputs of the tectothalamocortical pathway influence motion processing within the lateral suprasylvian (LS) area of the cat. METHODS: This study was conducted in five cats. Tungsten microelectrodes were used for recording visual evoked potentials. The electrodes were introduced into the LS area. An array of 120 randomly located dots was projected onto the stimulus field (40 degrees x 40 degrees) in front of the animal by a slide projector. The dots were moved rightward and leftward alternatively with interstimulus intervals by a mirror attached to a galvanometer, the movements of which were controlled by a microcomputer. Each motion sequence consisted of an abrupt onset of motion that continued for 100 msec followed by an abrupt offset and a stationary phase of 900 msec; the total duration of each sequence was thus 1000 msec. The velocity of the motion was varied in 12 steps. The onset of motion was used as the trigger for recording evoked potentials. Single or multiple injections (two to three) of muscimol were made, mainly into the rostral superior colliculus (SC). The amplitudes of evoked potentials before and after the muscimol injection were compared. RESULTS: A large negative wave (N1) with the peak latency of 89.80+/-16.39 msec (mean +/- SD, n = 191) was recorded consistently. The amplitude of N1 was not altered by the muscimol injection into the SC when the velocity of motion was 50 deg/sec or less. When the velocity of motion was 75 deg/sec or more, however, the amplitude of N1 was reduced to 62% to 72% of that noted before the muscimol injection. CONCLUSIONS: These findings suggest that the LS area processes the visual motion inputs reaching through the two parallel pathways, the geniculostriate pathway and the tectothalamocortical pathway, when the velocity of visual motion is 75 deg/sec or more.

Animals↗
PubMed2000

[Radiation therapy for malignant lymphoma].

For the treatment of malignant lymphoma(ML), it is important to recognize its clinical features. Recently, the role of radiation therapy(RT) has been reconsidered in the treatment of ML because of the effectiveness of combined modality treatment (CMT) for early-stage aggressive non-Hodgkin's lymphoma(NHL). Recent data suggest that adjuvant radiotherapy to the bulky site in advanced-stage aggressive NHL may significantly improve the relapse-free survival and overall survival. On the other hand, in the treatment of early-stage Hodgkin's disease(HD), meta-analysis data showed no apparent survival benefit from CMT or extended RT compared with RT alone. So in the initial treatment of early-stage HD, RT alone with adequate field should be recommended. Low-grade mucosa-associated lymphoid tissue(MALT) lymphoma is considered to be an additional indication for the use of RT because it is very sensitive to radiation and potentially curable with RT.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed2000

High macrophage-colony stimulating factor levels in synovial fluid of loose artificial hip joints.

OBJECTIVE: To clarify a macrophage-colony stimulating factor (M-CSF) related mechanism of aseptic loosening of artificial hip joints. METHODS: Synovium-like interface tissues between bone and prosthesis, regenerated pseudocapsular tissues, and synovial fluid (SF) were collected from 9 patients with loose artificial hip joint at revision surgery. Tissue distribution, production site, and SF level of M-CSF in loose hip joints were investigated by immunohistochemistry, reverse transcription-polymerase chain reaction (RT-PCR), and ELISA, respectively. For a comparative assessment of the M-CSF level in loose hip joints, SF of active rheumatoid arthritis (RA) and mild osteoarthritis (OA) also were analyzed by ELISA. RESULTS: Immunohistochemical analysis showed the presence of M-CSF immunoreactive cells mainly in the interface tissues between bone and prosthesis and inner pseudocapsular tissues, both of which were in contact with joint fluid. RT-PCR analysis confirmed the local production of M-CSF in these periprosthetic tissues. Significantly higher M-CSF level in loose hip joint fluid than in active RA and mild OA fluid was revealed by ELISA. CONCLUSION: High M-CSF level in loose hip joint fluid suggests transportation of M-CSF from production sites to joint fluid. This indicates that not only polyethylene wear particles (reported to induce foreign body reaction at the bone-prosthesis interface), but also M-CSF, abundant in joint fluid, are transported to and affect the interface. Thus, M-CSF is locally produced in periprosthetic tissues of loose hip joints and possibly contributes to periprosthetic weakening and osteolysis via joint fluid, leading to prosthetic loosening.

Aged↗
PubMed2000

Complement mediated vascular endothelial injury in rheumatoid nodules: a histopathological and immunohistochemical study.

OBJECTIVE: To evaluate morphologically and immunohistochemically the role of IgM rheumatoid factor (RF) immune complexes and complement activation in rheumatoid nodule vascular injury, a typical extraarticular manifestation of rheumatoid arthritis. METHODS: Histological features such as cellular infiltration, endothelial alteration, fibrinoid degeneration, and basement membrane alterations were observed in the small vessels in rheumatoid nodules. An immunohistochemical study was also carried out. RESULTS: Distinct colocalization of IgM RF and terminal complement complexes (TCC: C5b-9) was observed on the luminal surface in some of the damaged endothelial cells. Immuno-electron microscopy revealed endothelial vesiculation, typical of the in vitro protective mechanism against complement attack, with deposition of not only TCC but also IgM RF. Most TCC positive endothelial cells simultaneously expressed the major complement regulatory factor, CD59. CONCLUSION: These data suggest that, in rheumatoid nodules, vascular injury mediated by complement activation involves the assembly of IgM RF on the endothelial cell surface.

Aged↗
PubMed2000

[A family with DRPLA and chronic renal failure].

We reported a family with dentato-rubro-pallido-luysian atrophy (DRPLA) and chronic renal failure. The proband was a 66-year-old woman who developed gait disturbance, limb ataxia, pyramidal tract signs, and dementia since age 54. T2-weighted brain MR images revealed symmetric high-signal lesions in the cerebral white matter, in addition to cerebellar, brainstem, and cerebral cortical atrophy. She suffered from renal failure and became dialysis-dependent at the age of 59, four years after the onset of chronic nephritic syndrome. At the age of 66, she was admitted to our hospital because of hyperthermia and disturbance of consciousness, and died of DIC. Her CAG repeats in the DRPLA gene were 58 and 12. An autopsy was performed. The brain weighed 910 g. Histological findings confirmed the diagnosis of DRPLA. Her mother died of chronic renal failure. All three siblings had cerebellar ataxia, and two siblings had chronic nephritic syndrome. Among them, only her younger brother was diagnosed as non-IgA glomerulonephritis based on kidney biopsy findings at the age of 48. Though the nature of the association between DRPLA and renal dysfunction remains obscure, the DRPLA gene abnormality may be correlated with chronic renal failure in this family.

Aged↗
PubMed1999

Involvement of a cellular glycolytic enzyme, phosphoglycerate kinase, in Sendai virus transcription.

In vitro mRNA synthesis of Sendai virus is almost entirely dependent on the addition of cellular proteins (host factors). Previous studies indicated that the host factor activity from bovine brain was resolved into at least two complementary fractions, one of which may be tubulin. In this study, the host factor activity that stimulates the transcription in the presence of tubulin was further purified from bovine brain. This fraction was found to contain at least two complementary factors, and one of them was purified to a single polypeptide chain with an apparent M(r) of 46,000 (p46). From the amino acid sequence, biochemical, and immunological analyses, p46 was identified as a glycolytic enzyme, phosphoglycerate kinase (PGK). Purified native PGK from rabbit and yeast, and a recombinant human PGK substituted for p46. Although, as previously suggested, tubulin was involved in the transcription initiation complex formation by being integrated into the complex, p46 and its complementary factor had little effect on the complex formation. On the other hand, when p46 and the complementary factor were added to the RNA chain elongation reaction from the isolated initiation complex formed with tubulin, mRNA synthesis was dramatically stimulated. The enzymatic activity per se of PGK did not seem to be required for its activity. West-Western blot analysis showed that PGK could directly interact with tubulin. These data suggest that PGK stimulates Sendai virus mRNA synthesis at the elongation step, probably through its interaction with tubulin in the initiation complex.

Amino Acid Sequence↗
PubMed1999

Concurrent chemoradiotherapy for esophageal carcinoma patients with malignant fistulae.

BACKGROUND: It remains controversial whether chemotherapy and/or radiotherapy are/is contraindicated for esophageal carcinoma patients with malignant fistulae. In some case reports, closure of fistulae by chemotherapy or radiotherapy has been reported. The current study investigated chemoradiotherapy for these patients using various primary treatments to manage the pulmonary complications. The aim of this study was to evaluate the efficacy and feasibility of chemoradiotherapy for patients with locally advanced esophageal carcinoma with malignant fistulae. METHODS: Patients with endoscopically or radiologically confirmed fistulae were treated with concomitant chemoradiotherapy. Closure of fistulae was assessed by esophagography or endoscopy. Oral food intake also was assessed before and after treatment. RESULTS: Of 202 esophageal carcinoma patients treated at National Cancer Center Hospital East between July 1992 and May 1998, 24 patients (11.9%) developed malignant fistulae. Twelve patients developed fistulae before treatment and the remaining patients developed fistulae during treatment. Closure of the fistulae after chemoradiotherapy was observed in 17 of these patients (70.8%), and 16 of these 17 patients (94.1%) had oral alimentation restored after successful treatment. The median survival time from the diagnosis of the fistula for all patients with fistulae was 198 days; in the patients whose fistulae were present before chemoradiotherapy, the median survival time was 238 days. CONCLUSIONS: These results suggest that the presence of malignant fistulae does not contraindicate chemoradiotherapy. Once the inflammation due to the fistula has been controlled, chemoradiotherapy should be utilized because it may provide the best chance for survival and palliation of severe dysphagia.

Adult↗
PubMed1999

Matrix metalloproteinases and tissue inhibitors of metalloproteinases in joint fluid of the patients with loose artificial hip joints.

The pseudojoint cavity formed in patients undergoing total hip arthroplasty (THA) is later remodeled to synovial membrane-like tissue, which produces pseudosynovial fluid. This pseudosynovium also is an important source of matrix metalloproteinases (MMPs). As it is widely speculated that synovial fluid MMPs may contribute to local tissue degradation in rheumatoid arthritis (RA) and osteoarthritis (OA), we hypothesize that locally produced MMPs are found in the pseudosynovial fluid, via which they have access to the implant-host interface, and that if they retain their proteolytic potential, they might contribute to aseptic loosening. Enzyme-linked immunosorbent assay (ELISA), immunoblotting, and zymography were used to analyze MMPs and tissue inhibitors of metalloproteinases (TIMPs) in synovial fluid in aseptic loosening, which was compared to RA and OA. Pseudosynovial THA fluid was characterized using low levels of MMP-1 but moderate levels of MMP-13 and MT1-MMP (MMP-14). Due to the lack of an appropriate assay, MMP-13 and MT1-MMP were not similarly assessed, but the immunoblotting indicated that they were in the 56 kD intermediate proteolytically processed forms. The MMP-9 level was intermediate between RA and OA. MMP-2 was on a significant level, but there were no differences among study groups. The THA group also was characterized using relatively high levels of TIMP-1 and TIMP-2. Accordingly, MMP-9 and MMP-2 were found to occur in the 92 kD and 72 kD proenzyme form, respectively, with full activity retained in all study groups. The data suggest that proMMP-2-TIMP-2 and proMMP-9-TIMP-1 complexes are formed in the pseudosynovial fluid due to the excess of TIMPs over MMPs in aseptic loosening of THA. TIMP-complexed MMPs are resistant to MMP-mediated proteolytic activation, which may explain their latency and proenzyme zymogen form. Thus, formation of stabilizing proMMP-TIMP complexes enable transportation of proMMPs far from their original site of production. Due to motion-associated cyclic changes of the intra-articular pressure, fluid-phase MMPs stabilized by TIMPs might be absorbed to implant surfaces and interface tissues and help to dissect the implant/cement-to-bone interface in situ. Consequently, they may contribute to local proteolytic/tissue destructive events and aseptic loosening.

Aged↗
PubMed1999

Mapping and characterization of quantitative trait loci for non-insulin-dependent diabetes mellitus with an improved genetic map in the Otsuka Long-Evans Tokushima fatty rat.

The Otsuka Long-Evans Tokushima Fatty (OLETF) rat is an animal model for obese-type, non-insulin-dependent diabetes mellitus (NIDDM) in humans. We have previously reported four quantitative trait loci (QTLs) responsible for NIDDM on Chromosomes (Chrs) 7, 14, 8, and 11 (Nidd1-4/of for Non-insulin-dependent diabetes1-4/oletf) by a whole-genome search in 160 F2 progenies obtained by mating the OLETF and the Fischer-344 (F344) rats. Our present investigation was designed to identify and characterize novel QTLs affecting NIDDM by performing a genome-wide linkage analysis of genes for glucose levels and body weight and analysis for gene-to-gene and gene-to-body-weight interactions on an improved genetic map with a set of 382 informative markers in the 160 F2 progenies. We have identified seven novel QTLs on rat Chrs 1 (Nidd5 and 6/of), 5 (Nidd7/of), 9 (Nidd8/of), 12 (Nidd9/of), 14 (Nidd10/of) and 16 (Nidd11/of) which, together with the Nidd1-4/of, account for a total of approximately 60% and approximately 75% of the genetic variance of the fasting and postprandial glucose levels, respectively, in the F2. While the OLETF allele corresponds with increased glucose levels as expected for the novel QTLs except Nidd8 and 9/of, the Nidd8 and 9/of exhibit heterosis: heterozygotes showing significantly higher glucose levels than OLETF or F344 homozygotes. There are epistatic interactions between Nidd1 and 10/of and between Nidd2 and 8/of. Additionally, our results indicated that the Nidd6 and 11/of could also contribute to an increase of body weight, and that the other five QTLs could show no linkage with body weight, but Nidd8,9, and 10/of have an interaction with body weight.

Animals↗
PubMed1999

Severity of upper limb injuries in snowboarding.

A retrospective survey of 1,445 snowboarders and 10,152 skiers was undertaken to determine the incidence, pattern and severity of both snowboarding and skiing injuries. The incidence of snowboarding injury (0.33%) was higher than that of skiing injury (0.11%, P < 0. 01). Also, in showboarding there was frequent involvement of the arms (51.3%) when compared with skiing (25.9%, P < 0.001). In the arms, fracture (45.7%) was frequently observed in snowboarding, vs 31.3% in skiing. The wrist was the most affected site (18.7%, P < 0. 01) in snowboarding (skiing 2.3%), and the fracture rate was significantly high (71.6%, P < 0.001). The rate of dislocation of the elbow (27.7%) was also higher in snowboarding than in skiing (13. 5%, P < 0.001). Regarding arm injuries, 57.9% of injured snowboarders were beginners whose experience was shorter than 1 year, and 91.5% was caused by falling down. These results indicate that a snowboarding injury involving the upper limb region is a severe accident, with a frequent risk of fracture in the wrist and dislocation of the elbow. The severity of arm injuries in snowboarding seems to be caused by direct force on the wrist and elbow, which receive the full impact of a fall. These data suggest that beginners should have appropriate lessons of basic skills including safe falling. The development of a safety system also appears sensible to prevent such severe injuries in snowboarding.

Accidental Falls↗
PubMed1999

Cupric nitrilotriacetate-induced apoptosis in HL-60 cells association with lipid peroxidation, release of cytochrome C from mitochondria, and activation of caspase-3.

Oxidative stress may be a common mechanism underlying various forms of cell death, including necrosis and apoptosis. The authors have reported previously that the cupric nitrilotriacetate (Cu-NTA), a renal carcinogen, induces oxidative DNA damage and apoptosis in HL-60 human leukemia cells (Ma, Y., et al. Free Radic. Biol Med. 25:568-575; 1998). The focus of this investigation was to examine the possible pathway of the apoptosis induced by Cu-NTA. Results of the present study demonstrated that after exposure of HL-60 cells to Cu-NTA, an increase in lipid hydroperoxide and loss of mitochondrial membrane potential (deltaphim) were observed, followed by the increase in cytosolic cytochrome c that was released from the mitochondria. These events proceeded and triggered the activation of caspase-3 (CPP32/apopain/Yama), resulting in the degradation of poly (ADP-ribose) polymerase and DNA fragmentation. The antioxidants, N-acetylcysteine and glutathione, protected the loss of deltaphim and blocked the apoptosis induced by Cu-NTA. In addition, Ac-DEVD-CHO, a specific inhibitor of caspase-3, inhibited Cu-NTA-induced apoptosis. These results suggested that Cu-NTA-induced apoptosis in HL-60 cells was, at least in part, triggered by free radical-induced lipid peroxidation of membrane, which induced the release of cytochrome c from mitochondria and activation of caspase-3.

Acetylcysteine↗
PubMed1999

Long-term follow-up of an individual with vitamin B6-dependent seizures.

We report on a 31-year-old female with vitamin B6-dependent seizures whose seizure onset was in the neonatal period. Her elder brother had the same disorder and died in infancy. Administration of vitamin B6 was initiated in the postnatal period. At the age of 12 years 1 month, 2 months after withdrawal of vitamin B6, visual seizures began to occur frequently. Myoclonic seizures and occasional generalized convulsive seizures were also observed. At the same time, photoparoxysmal response and spontaneous diffuse spike-wave bursts were seen on her EEG. Myoclonic seizures were provoked by intermittent photic stimulation during the EEG. It is distinctive that visual seizures were one of the main seizure types in this patient, that her clinical course was relatively benign, and that she has normal intellectual outcome.

Adult↗
PubMed1999

Identification of possible quantitative trait loci responsible for hyperglycaemia after 70% pancreatectomy using a spontaneously diabetogenic rat.

The Otsuka Long-Evans Tokushima Fatty (OLETF) rat is an animal model for obese-type non-insulin-dependent diabetes mellitus (NIDDM) in humans. The OLETF rat exhibits sustained hyperglycaemia after partial pancreatectomy, while the normal control rat does not. This difference is thought to be genetically determined and to be caused by impairment of beta-cell regrowth, a possible event involved in the pathogenesis of NIDDM. Our investigation was designed to identify quantitative trait loci (QTL) responsible for post-pancreatectomy hyperglycaemia by performing a genome-wide scan in an F2 intercross obtained by mating the OLETF and Fischer-344 (F344) rats. We have identified three possible QTL on rat chromosomes (Chrs) 3, 14 and 19 that account for a total of approximately 75% of the genetic variance in the F2. For the QTL on Chr 14, the OLETF allele corresponds with increased glucose levels, as expected. Surprisingly, for the QTL on Chr 19, the F344 allele corresponds with increased glucose levels. The Chr 3 QTL exhibits heterosis, heterozygotes showing significantly higher glucose levels than OLETF or F344 homozygotes. We also found evidence for interaction (epistasis) between the QTL on Chrs 14 and 19.

Animals↗
PubMed1999

Local-regional control by conventional radiotherapy according to tumor volume in patients with squamous cell carcinoma of the pharyngolarynx.

BACKGROUND: To estimate the effect of tumor volume on local-regional control of pharyngolaryngeal cancer by radiotherapy (RT). METHODS: Definitive RT for 48 patients with squamous cell carcinoma of the lateral wall of the oropharynx, pyriform sinus and supraglottic larynx was reviewed. Tumor volume was estimated from computed tomography and it was expressed as the diameter of a sphere the volume of which is equal to the primary tumor (Td) and sum of the volumes of metastatic adenopathies (Nd). All patients received > or =60 Gy (median 66 Gy) to the gross tumor by conventional fractionation with or without chemotherapy. RESULTS: A median period of follow-up for survivors was 32.7 months (range, 12.4-68.6). The 2 year local control rate for T1/2 (n = 30) and T3/4 (n = 18) patients was 72 and 65%, respectively (P= 0.966), however, the rates for Td < 4 cm tumors (n = 37) and Td > or = 4 cm tumors (n = 11) were significantly different (80% vs 27%, P < 0.001). The 2 year regional control rates for Nd < 3 cm lesions (n = 29) and Nd > or = 3 cm (n = 19) lesions were 85 and 42%, respectively (P < 0.001). The 2 year ultimate regional control rates for N2/3 disease with Nd < 4 cm (n = 11) and Nd > or = 4 cm (n = 11) were 100 and 42%, respectively (P = 0.004). CONCLUSIONS: Conventional radiotherapy may allow organ preservation and ultimate local control in patients with Td < 4 cm and Nd < 4 cm disease, but larger volume tumors should be considered candidates for the most intensive chemoradiotherapy.

Adult↗