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Biomedical subjects

H Yano

Publications and source records attributed to H Yano.

At least 433 records · Page 24Linked to original sources
PubMed1988

A new human pleomorphic hepatocellular carcinoma cell line, KYN-2.

A new human hepatocellular carcinoma (HCC) cell line, KYN-2, has been established from a surgical specimen obtained from a 52-year-old Japanese male HCC patient. The originally resected HCC was classified as pleomorphic HCC corresponding to Edmondson-Steiner's grade III with a thick trabecular to solid arrangement. The cell line has been maintained for 17 months through 35 passages. Morphologically, the KYN-2 cells have retained the characteristics of the original HCC, being pleomorphic and composed of various types such as cells with relatively small, polygonal, eosinophilic cytoplasm and oval-shaped nuclei with a marked tendency to pile up, flat cells with abundant clear cytoplasm and oval-shaped nuclei, and many multinucleated giant cells, proliferating in a pavement-like cell arrangement. Some junctional complexes and a number of microvilli are evident between the cells by electron microscopy. Functionally, these cells were found to secrete albumin, alpha 1-acid glycoprotein, alpha 1-antitrypsin, ceruloplasmin, transferrin, complement C, fibrinogen, fibronectin, prothrombin, retinol-binding protein (serum type), alpha-fetoprotein (AFP), carcinoembryonic antigen (CEA), ferritin and beta 2-microglobulin in chemically defined medium (CDM). The secretion of AFP and CEA is apparently dependent upon culture medium and passage. The doubling time of cells growing in serum-containing medium at the 14th passage was 84 h, and those of cells in serum-containing medium, HB101 (serum-free medium) and CDM at late passage were 28, 68, and 42 h, respectively. Chromosome analysis revealed that the chromosome number ranged from 56 to 69 without a mode, and the presence of marker chromosomes. HB virus DNA sequence was not detected by hybridization analysis. The tumorigenicity of KYN-2 cells was identified by development of tumors in nude mice after subcutaneous injection of the cells; the tumors showed an appearance basically similar to that of the original HCC. Thus, these findings suggest that the KYN-2 cell line is available as a new human HCC cell line and should be useful for various studies on HCC.

Animals↗
PubMed1988

The effect of high calcium and/or high protein diet on bone growth in growing rats kept at high ambient temperature.

The effects of high calcium and/or high protein diet on bone growth were examined in growing rats kept at high ambient temperature. Thirty-five Wistar strain male rats aged 45 days were divided into 5 groups; room temperature, 24 degrees C and a normal diet (CN), 34 degrees C and a normal diet (HN), 34 degrees C and a high calcium diet (HCa), 34 degrees C and a high protein diet (HPr), and, 34 degrees C and a high calcium-protein diet (HCaPr). The animals were given the same amount of feed. On day 35 of experiment, blood and femurs were collected from all rats. Physical traits, calcium and phosphorus contents of right femur were measured. The number of chondrocyte and the thickness of epiphyseal growth plate were measured in distal epiphysis of left femur. Alkaline phosphatase activities and protein contents were measured in the homogenate of proximal epiphysis and diaphysis of left femur. Ultrafiltrable calcium concentrations and total concentrations of calcium and phosphorus were measured in serum. None of the treatments significantly affected the elongation and densities of calcium and phosphorus in femur. The bone growth in width was reduced at high ambient temperature and high protein diet furthermore reduced the bone growth in width at high ambient temperature. Total calcium and phosphorus concentrations were lower in serum at high ambient temperature. Total calcium concentration in serum was increased by high calcium diet and decreased by high protein diet in hot environment, while ultrafiltrable calcium concentration in serum tended to be higher at high temperature.(ABSTRACT TRUNCATED AT 250 WORDS)

Alkaline Phosphatase↗
PubMed1988

[Determination of various tumor markers, with special reference to sialyl SSEA-1 antigen in lung cancer].

Tumor markers including sialyl SSEA-1 antigen (SLX) were measured in 77 patients with lung cancer and 116 patients with benign respiratory diseases. Increased levels of serum SLX were observed in 57.6% (19/33) of adenocarcinoma of the lung, and an overall positive rate was 42.9% (33/77) in lung cancer cases. The false positive incidence of SLX in the sera from the patients with non-malignant diseases was as low as 8.6%. Among other tumor markers determined, serum CA 19-9, CEA had a relatively high positive rate, but the false positive incidence were not low. In cases of poor prognostic cases of with adenocarcinoma of the lung, SLX levels became levels higher than the previous ones, but not in cases of other cell types were not. Not only in the patients with lung cancer but also in those with benign respiratory diseases such as bronchiectasis and lung fibrosis, high levels of SLX seemed to suggest poor prognosis. These results indicate that SLX may contribute for monitoring and prognosis of the cases of lung cancer and other respiratory diseases.

Antigens, Tumor-Associated, Carbohydrate↗
PubMed1987

Sequence of an intestinal cDNA encoding human motilin precursor.

A cDNA clone encoding the human motilin precursor was isolated from an intestinal library using synthetic oligonucleotide probes. The predicted amino acid sequence indicates that the motilin precursor consists of 115 amino acids and includes a 25-residue N-terminal signal peptide followed by the 22-amino-acid motilin sequence and a long, 68-residue C-terminal peptide. The amino acid sequence of human motilin predicted from the cDNA sequence is identical to its porcine counterpart, which has been determined by protein sequencing. Proteolytic processing of promotilin to motilin occurs at the sequence, Lys-Lys, this being the first reported instance of processing occurring at a pair of Lys residues. In other precursors it occurs at Lys-Arg, Arg-Arg, Arg, or very rarely Lys.

Amino Acid Sequence↗
PubMed1987

Inverted U wave in ergonovine-induced vasospastic angina.

The relationship between inverted U wave in leads V5 and II and the location of myocardial ischemia was studied in 52 positive patients and in 50 negative patients with ergonovine provocation test. Development of a biphasic or negative U wave, or increased negativity of U wave (inverted U wave) was observed in 15 of 17 patients with spasm in only the right coronary artery (RCA), in 6 of 8 with spasm in only the left anterior descending artery (LAD), in 2 of 8 with spasm in only the left circumflex artery (LCx), and in 23 of 24 with spasm in two or more vessels. Of 52 positive patients in the ergonovine provocation test, 46 (88.5%) had inverted U wave. Of these, 17 (32.7%) had inverted U wave without discernible ST deviation. Of 50 negative patients, 2 had inverted U wave. Inverted U wave in lead V5 was frequently seen in patients with spasm of LAD, but this finding was not uncommon in spasm of RCA or LCx. On the other hand, inverted U wave in lead II was frequently seen in spasm of RCA and LCx, but not in spasm of LAD. These findings suggest that inverted U wave in lead V5 is not specific for myocardial ischemia due to spasm of LAD and that inverted U wave in lead II is specific for spasm of RCA and LCx.

Adult↗
PubMed1987

Nonimmunologic hydrops fetalis: a clinicopathological study of 50 autopsy cases.

Fifty cases of nonimmunologic hydrops fetalis found in Japanese infants are reported. Nonimmunologic hydrops fetalis is associated with various pathological conditions, twin transfusion syndrome including acardiac monsters, fetal heart diseases, congenital cystic adenomatoid malformation, pulmonary sequestration, pulmonary lymphangiectasia, intrauterine infections such as cytomegalovirus infection and neonatal hepatitis, congenital neuroblastoma, Kasabach-Merritt syndrome, cystic hygroma, and chromosomal aberrations. The mechanism of hydrops fetalis found in these conditions is discussed from various viewpoints. Despite a careful examination, no causative conditions were found in 14 cases. The placenta showed a proliferation of Hofbauer cells that were strongly positive for immunoreactive alpha 1-antichymotrypsin and there were other common findings such as edema of terminal villi and fibrin thrombi.

Abnormalities, Multiple↗
PubMed1987

An attempt to assess the replacement dose of human growth hormone in the treatment of growth hormone deficient children.

In 25 patients with hGH deficiency, who had been treated long-term with hGH, the mode of hGH administration was switched from the conventional method (0.3-0.5 IU/kg/week, in two or three divided doses, intramuscularly) to daily subcutaneous injection at 1900-2100 hours with a dose of 0.46 +/- 0.07 IU/kg/week (equivalent to 14.7 +/- 2.0 IU/m2/week). After 1-3 months of this new mode of hGH administration, blood and urine were sampled at 0900 hours after overnight fasting. Blood glucose, plasma insulin, plasma IGF-1 and plasma total IGF (after extraction) were analysed in blood samples. IGF-1 and hGH were measured in urine samples. These measurements indicated that the dose studied was close to a replacement one, but might be slightly higher than the exact replacement dose.

Adolescent↗
PubMed1987

Effect of thyroxine injection on bone growth in malnourished rats at different growth stages.

This study investigated the role of thyroxine on bone growth by injecting it into malnourished weaned and suckling rats. Weaned rats were fed a normal diet or a low-protein, low-energy diet, and injected with saline or thyroxine (5 micrograms/100 g BW) for 22 days. Suckling pups were injected with saline or 2 micrograms of thyroxine, and reared by dams fed a normal diet or a low-protein diet for 15 days. Thyroxine injection decreased body weight gain in both growth stages. Bone length, width and weight were not affected by thyroxine injection in weaned rats. Thyroxine injection increased femur length and tail growth, but did not change bone width in suckling rats. The epiphyseal growth plate and zone of hypertrophic cartilage cells were thinner in malnourished rats than in normal rats at both growth stages, but the number of proliferating chondrocytes was greater in suckling rats that received thyroxine injections than in those that received saline injections. The disappearance of trabeculae was observed in both normal and malnourished weaned rats upon thyroxine injection. These results suggested that retarded bone growth due to malnutrition might be independent of thyroid function in both growth stages.

Animals↗
PubMed1987

[Determination of various tumor markers, with special reference to neuron-specific enolase in lung cancer].

Serum neuron-specific enolase (NSE) was measured in 23 patients with small cell lung cancer (SCLC) and 184 patients with non-small cell lung cancer (non-SCLC), both of which were untreated. Increased levels of serum NSE were observed in 82.6% (19/23) of SCLC, whereas 9.8% (18/184) of non-SCLC had positive results showing an overall positive rate of 17.9% (37/207) in lung cancer cases. In addition, the elevation of serum NSE levels in non-SCLC patients seemed to suggest poor prognosis. Elevated serum NSE levels returned to normal with either surgical resection of the tumor or response to chemotherapy, after which serum NSE levels were again raised to levels higher than the previous ones in cases of relapse or progression. The evaluation of serum NSE may be a useful marker for both diagnosis and monitoring of responsiveness to therapy as well as for recognition of relapse and progression in SCLC. Identification of NSE as assessed by immunohistochemical procedure employing the ABC method on formalin-fixed paraffin-embedded tissue sections in lung cancer cases of each histological type, showed that some materials from non-SCLC cases were positively stained despite the presence of normal serum NSE levels, and did not always parallel the serum levels. Among other various tumor markers determined, serum CA 19-9 had a relatively high positive rate of 38.2% (42/110) in adenocarcinoma of the lung.

Antigens, Neoplasm↗