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Biomedical subjects

Y Kurosu

Publications and source records attributed to Y Kurosu.

At least 37 records · Page 2Linked to original sources
PubMed1994

Peptidergic nerves in Hirschsprung's disease and its allied disorders.

To clarify the significance of peptidergic nerves in Hirschsprung's disease (aganglionosis), hypoganglionosis, and neuronal intestinal dysplasia (NID), we investigated enteric nerve responses in colonic tissues obtained from patients with these diseases. Colonic tissue specimens were obtained from 12 patients with aganglionosis, 8 patients with hypoganglionosis, and 6 patients with NID. Colon specimens from 20 patients without constipation were used as controls. A mechanograph was used to evaluate in vitro colonic responses to electrical field stimulation (EFS) of the adrenergic and cholinergic nerve blockers and gastrointestinal hormones. The following results were obtained: (1) Non-adrenergic inhibitory nerves were found to act on the normal human colon and to a lesser extent in colons with hypoganglionosis or NID, but had no effect on the enteric nerves in colons with aganglionosis. (2) Peptidergic neurotransmitters such as VIP, substance P, and neurotensin apparently act in the normal human colon, and to a lesser extent in the colons with hypoganglionosis or NID, but their effect was almost absent in aganglionosis. (3) VIP acts via neural mechanisms, while substance P and neurotensin may act both via nerves and also directly on the bowel smooth muscle. The diminution of action of non-adrenergic inhibitory nerves and peptidergic nerves may be largely related to the impaired motility observed in hypoganglionosis, NID and aganglionosis.

Adolescent↗
PubMed1994

Direct PCR of whole blood and hair shafts by microwave treatment.

We report a simple and rapid method for DNA preparation suitable for PCR by microwave irradiation. When mouse whole blood and hair shafts were directly irradiated and subjected to PCR, a unique gene such as the retinoblastoma susceptibility gene was reproducibly amplified. This method was useful for screening a transgene sequence in transgenic mice.

Animals↗
PubMed1994

[Successful neoadjuvant chemotherapy in a patient with advanced gastric cancer with multiple liver metastases].

We described a case of advanced gastric cancer with multiple liver metastases, who was placed on neoadjuvant chemotherapy using CDDP and 5-FU (FP therapy) with a marked reduction in tumor load. The case was a 67-year-old male, who was admitted with a Borrmann III type advanced gastric cancer with multiple liver metastases. FP chemotherapy was carried out two times as neoadjuvant chemotherapy. As a result, both primary cancer and the metastatic tumors showed a remarkable reduction. Then, total gastrectomy with combined resections of spleen and transverse colon was done, and a reservoir was inserted into the hepatic artery. Postoperatively, intrahepatic arterial infusion of CDDP with oral administration of 5-FU was done in the outpatient clinic for about eleven months. But thirteen months later, he died from the rapid recurrence of the tumor.

Adenocarcinoma↗
PubMed1992

[The effect of epidural analgesia on respiratory muscles].

The effect of epidural analgesia on respiratory functions and muscular power was studied in patients. The subjects had no abnormality of cardiopulmonary system, and were classified into two groups; the adult group whose ages were 21 to 59, and the aged group, 60 to 72. Either 1% or 2% mepivacaine for epidural anesthesia was used to obtain the analgesic level up to Th4 and Th7 in adult group, and Th4 in aged group. The analgesic level was assessed by the pin-prick method. Vital capacity, forced vital capacity, forced expiratory volume 1 second, peak expiratory flow rate, maximal mid-expiratory flow rato, maximal inspiratory pressure and maximal expiratory pressure decreased significantly after epidural anesthesia in all patients whose analgesic levels were up to Th4. In all patients, the change of maximal expiratory pressure was larger than that of maximal inspiratory pressure after epidural analgesia. The patients whose analgesic levels were up to Th7 by 1% mepivacaine in adult group, showed a significant increase of maximal inspiratory pressure. It is concluded that epidural anesthesia diminishes respiratory functions and respiratory muscular power associated with a higher level of analgesia.

Adult↗
PubMed1989

[Pharmacokinetic and clinical studies of cefmenoxime in neonates and premature infants].

Serum concentrations and urinary recovery rates of cefmenoxime (CMX) were determined in 41 mature and premature infants (with ages 0-24 days) after one shot intravenous injection of 10, 20 (1-hour intravenous drip infusion was also carried out) or 30 mg/kg for treatment and prophylaxis of various infections. Because the number of cases included was small, a comparison study was conducted by classifying them into 3 groups; 3 days or younger, 4 to 7 days, and 8 days or older, rather than dividing them into groups of mature and premature infants. Clinical evaluation was conducted in 7 male and 1 female cases 1 to 29 days old, whose diseases comprised 1 case each with septicemia, purulent otitis media and phlegmonous cellulitis, 3 with pneumonia and 2 with urinary tract infection. 1. Changes in serum concentrations and urinary recovery rates (1) Intravenous bolus injection of 10 mg/kg: Serum concentrations of the drug in the 3 age groups peaked at 28.9, 29.5 and 29.1 micrograms/ml, respectively, all at 30 minutes after the drug administration, and thereafter gradually declined. The mean level in the 3rd group was the lowest at 1.9 micrograms/ml at 6 hours. Average serum half-lives of CMX were shorter in older subjects, 3.0, 1.9 and 1.4 hours, respectively in the 3 groups. Urinary recovery rates were relatively high, 68.9 to 84.9% in the 3 cases examined during the first 6 hours, and 15.4 to 66.2% during the first 2 hours. (2) Intravenous bolus injection of 20 mg/kg: Serum concentrations of the drug in the 3 groups peaked at 65.2, 60.5 and 65.8 micrograms/ml, respectively, all at 30 minutes after the drug administration, with no significant differences noted among the groups. The levels gradually declined thereafter in all groups, but remained rather high at 20.1, 6.5 and 9.5 micrograms/ml, respectively, at 6 hours. Average serum half-lives of CMX were 3.5, 1.7 and 1.9 hours, respectively. The inversion of values obtained between the 2nd and 3rd groups appears to be attributable to that all of the 3rd group were premature infants, and the body weight of 2 cases of them were less than 2,000 g each. Urinary recovery rates ranged widely from 37.0 to 89.4% in the 4 cases examined during the first 6 hours. (3) One-hour intravenous drip infusion of 20 mg/kg: Serum concentrations of the drug in the 3 groups peaked at 57.7, 60.2 and 72.4 micrograms/ml, respectively, all at the termination of the drug infusion.(ABSTRACT TRUNCATED AT 400 WORDS)

Bacterial Infections↗
PubMed1989

Cimetidine-mediated augmentation of lymphocyte responses to phytohemagglutinin in gastric cancer patients.

The effect of cimetidine, a histamine type 2 receptor antagonist, on lymphocyte responses to phytohemagglutinin (PHA) was studied in 58 gastric cancer patients. Cimetidine significantly enhanced lymphocyte responses to PHA in certain gastric cancer patients. The degree of enhancement was associated with tumor load. A significant inverse correlation was observed between the degree of enhancement and that of the original lymphocyte responses to PHA. The degree of enhancement significantly correlated with the proportions of OKT3 and OKT8 positive cells. A determination of the degree of enhancement in selected gastric cancer patients revealed it to fall to a low level after a certain period following curative gastric resection. These data appear to favor the in vivo therapeutic administration of cimetidine to advanced gastric cancer patients.

Adult↗
PubMed1988

Indomethacin enhancement of lymphocyte responses to phytohemagglutinin in breast, stomach and colorectal cancer patients.

The effect of indomethacin, a prostaglandin synthetase inhibitor, on lymphocyte responses to phytohemagglutinin (PHA) was studied in 111 breast, stomach and colorectal cancer patients. Indomethacin exerted no mitogenic activity and the ethanol in which the indomethacin was dissolved produced no significant effect on the lymphocyte responses to PHA. Compared with the control group (13 healthy subjects and 30 patients with benign disease), indomethacin significantly enhanced the lymphocyte responses to PHA in the cancer patients. The degree of enhancement induced by indomethacin was independent of the primary site of the tumor, but was associated with tumor load. A significant inverse correlation was observed between the degree of enhancement and that of the original lymphocyte responses to PHA. Sequential determinations of the degree of enhancement in selected stomach and colorectal cancer patients revealed that it fell to a low level after curative tumor resection.

Adjuvants, Immunologic↗
PubMed1986

In vitro growth and chemosensitivity studies of childhood cancers using clonogenic assay.

We evaluated the usefulness of the recently developed Human Tumor Clonogenic Assay (HTCA) for chemosensitivity studies in childhood cancers. A total of 20 childhood cancer specimens containing 8 neuroblastomas, 4 malignant lymphomas, three hepatoblastomas, two rhabdomyosarcomas, two germinomas and one adrenal carcinoma were assayed. Overall, 65 per cent (13/20) of tumor cell specimens showed adequate colony forming ability to yield the sensitivity of anticancer drugs. The pattern of in vitro sensitivity of a particular tumor to most anticancer drugs tested was not dissimilar to the clinical experiences of these agents. The overall in vitro response rate of childhood cancers to anticancer agents was 51 per cent. A retrospective analysis of this assay revealed a true positive rate of 57 per cent and a true negative rate of 100 per cent.

Antineoplastic Agents↗