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Biomedical subjects

R Kitagawa

Publications and source records attributed to R Kitagawa.

At least 37 records · Page 2Linked to original sources

Calcium supplementation in osteoporosis.

Although calcium is the most abundant inorganic constituent of the bone, indispensable for the maintenance of its physical strength, the role of calcium nutrition in the development of osteoporosis and the preventive and therapeutic significance of calcium supplementation in osteoporosis have been matters of intense controversy. The wide difference in the baseline nutritional intake of calcium among different groups and the variation in age of the patients studied may have been contributory factors. Emphasis has so far been placed on the rapid bone loss in the immediate postmenopausal period predominantly influenced by estrogen deficiency which has overshadowed the effect of calcium. The strong dependence of the effect of calcium preparation used tends to be forgotten. In the present study employing oyster shell electrolysate as the calcium source in patients with a mean age of approximately 80 years, bone mineral density was kept significantly higher than in age-matched, non-supplemented patients over a period of 2 years. In separate experimental studies, rats maintained on 2% calcium showed higher bone mineral content and lived longer than did controls maintained on 1% calcium. Age-associated deterioration of renal function and hyperlipidemia were also prevented by calcium supplementation.

Aged↗

[Serum concentration of type IV collagen in urological cancer--comparison with serum concentration of laminin].

In recent years, it has become clear that various extracellular substrates play an important role in the process of invasion and metastasis of malignant tumors. In a previous study, we reported that the serum concentration of laminin in renal cell carcinoma and prostate cancer is elevated, and furthermore, is remarkably high in patients with metastasis. However, in bladder cancer, this level is elevated only in those with metastasis, indicating that the serum concentration of laminin is useful as a marker for metastasis or clinical progression of the malignant tumor. In the present study, we measured the serum concentration of type IV collagen 7S-domain, which, as laminin constructs the basement membrane, and compared the result with the serum concentration of laminin, to evaluate the clinical significance of the findings. The serum concentration of type IV collagen 7S-domain was not elevated significantly in any tumor type, although the serum concentration of laminin was elevated in patients with renal cell carcinoma, prostate cancer and bladder cancer with metastasis. There were no significant differences in the serum concentration of type IV collagen 7S-domain in any group with metastasis.

Carcinoma, Renal Cell↗

In vitro adherence of Staphylococcus saprophyticus, Staphylococcus epidermidis, Staphylococcus haemolyticus, and Staphylococcus aureus to human ureter.

Staphylococcus saprophyticus adhered to human ureteral epithelium in vitro. The levels of adherence, which were determined quantitatively with the scanning electron microscope, correlated well with bacterial hemagglutinating activities with sheep erythrocytes (r = 0.9459, P < 0.01). Transmission electron microscopy revealed that the adhering bacteria and the hemagglutinating bacteria possessed similar pili-like structures on their cell surfaces. Staphylococcus epidermidis, Staphylococcus haemolyticus, and Staphylococcus aureus did not adhere to the epithelium. Only S. aureus adhered markedly to the connective tissue of the ureter, and adhesion of this organism was direct via its cell wall. This adherence test system clearly showed up differences in the abilities of these staphylococcal species to adhere to the urinary tract.

Bacterial Adhesion↗

[Intralesional and transarterial administration of interferon for renal cell carcinoma].

Topical administration of interferon for locally recurrent renal cell carcinoma in 2 cases was reported. Case 1: a 56-year-old woman had undergone radical nephrectomy for left renal cell carcinoma. She had a locally recurrent tumor adjacent to spleen 26 months after the surgery. She received 3 million units of interferon alpha every day intralesionally for almost 3 years without any distant metastasis. Case 2: a 59-year-old man had undergone left radical nephrectomy for renal cell carcinoma. He had recurrent tumor contiguous to spleen 24 months after nephrectomy. With Seldinger method a catheter was indwelled selectively in splenic artery. Two million units of interferon gamma was administered through the catheter, twice a week for 4 weeks, and once a week in subsequent course. The tumor showed necrosis on CT film. He died of DIC 5 months after the initiation of intraarterial administration of interferon gamma. Topical use of interferon showed some favorable effects in both cases even after the failure of systemic administration. Further investigation is warranted to demonstrate the advantage of topical use of interferon over systemic administration.

Carcinoma, Renal Cell↗

Papillary renal cell carcinoma. Report of two cases.

Papillary renal cell carcinoma is an uncommon variant of renal cell carcinoma which has unique features including hypovascularity or avascularity, extensive stromal macrophage infiltration and better prognosis than that for nonpapillary renal cell carcinoma. Two cases of papillary renal cell carcinoma presenting hypovascular or avascular angiology are presented. Histologically, the two tumors had a purely papillary structure. Papillae were lined by a layer of epithelial cells which lacked prominent cellular atypia, and there were numerous macrophages in the stroma. In addition, in one patient, extensive calcification of the tumor capsule was present. Furthermore, our experience in the present study with imprint cytology indicates that it offers corroborative information for the intraoperative diagnosis made on the basis of frozen section examination.

Adult↗

Binding sites for P and/or type 1-piliated Escherichia coli in human ureter.

Adherence sites for uropathogenic Escherichia coli in the excised human ureter were studied by using scanning electron microscopy. P-piliated E. coli adhered to younger epithelial cells which had microvilli on their surfaces, but did not to mature epithelial cells which had microfolds on their surfaces. This adherence was D-mannose resistant and alpha-D-Galactopyranosyl-(1----4)- beta-D-Galactopyranoside sensitive. Type-1 piliated E. coli adhered to both types of epithelial cells, but it was prevented by D-mannose. Entrapment of adherent type 1-piliated E. coli was observed only on the epithelial cells with microfolds. This model system allowed quantitative estimates of bacterial adherence to the luminal surface of the human ureteral mucosa in vitro, and demonstrated different manners of adherence of P and type 1-piliated E. coli.

Bacterial Adhesion↗

[Detubularized right-hemicolonic continent urinary reservoir with plicated terminal ileum].

A continent urinary reservoir which consists of 1) detubularized caecum, ascending colon and the right half of transverse colon. 2) anastomosis of ureter and ascending colon with antireflex technique, and 3) plicated terminal ileal segment for continence and catheter insertion was created in 12 patients after radical cystectomy for urothelioma. Our method to create a continent urinary reservoir is simple and technically easy. It can, therefore, provide patients' satisfaction with low incidence of complication. However, such continent urinary reservoir diversion should be performed only for carefully selected patients, taking into consideration the physical status and the character and social status of the patient. This is because some patients who have had such surgery may change their mind to keep a balloon catheter to avoid the intermittent self-catheterization every 3 to 4 hours after surgery.

Aged↗

[Serum concentration of laminin in transitional cell carcinoma].

The concentration of laminin in the serum was determined for 45 patients with urinary tract transitional cell carcinoma, and the clinical significance of the findings was considered. The difference between the serum laminin concentrations in the control group and the transitional cell carcinoma patient group was not statistically significant, but the serum laminin level was highest in the transitional cell carcinoma patients with metastatic foci. In many of the patients who had metastatic foci and showed clearly progressive disease, the serum laminin concentration was found to increase with the passage of time. When the transitional cell carcinoma tissues were stained by the fluorescent antibody technique, there was little distribution of laminin in the tumor tissues, contrary to our earlier-reported findings regarding the staining of laminin in renal cell carcinoma tissues. In renal cell carcinoma patients, the serum concentration of laminin had been found to be high even when there were no metastatic foci, and consideration of this fact strongly suggests the possibility that the mechanism for laminin synthesis in urinary tract transitional cell carcinoma is different from that in renal cell carcinoma. It was surmised that the serum laminin concentration has potential for use as a diagnostic indicator of metastasis in patients with urinary tract transitional cell carcinoma.

Carcinoma, Transitional Cell↗

In vitro adherence of type 1-fimbriated uropathogenic Escherichia coli to human ureteral mucosa.

Type 1-fimbriated Escherichia coli isolated from patients with urinary tract infections adhered in vitro to the epithelial cell surface of an excised human ureter. The bacteria also adhered to a mucous coating and to Formalin-fixed human ureteral mucosa. D-Mannose strongly inhibited such adherence. The bacteria in their nonfimbriated phase lacked the ability to adhere. We concluded that type 1 fimbriae play a role, at least in part, in upper urinary tract infections in humans.

Adult↗

[Clinical application of Sonolith 2000 type B on extracorporeal shock wave lithotripsy for upper urinary tract calculi].

This report describes the results of clinical trials of the second generation extracorporeal shock wave lithotriptor (Sonolith 2000 Type B) in patients with upper urinary tract stones. The studies were carried out on 101 cases at the Departments of Urology, Juntendo University School of Medicine, Kanto Teishin Hospital and General Daiyukai Hospital from Nov. 1987 to Jun. 1988. The location of stones were renal calyx and pelvis in 84 cases, ureteropelvic junction in 7 cases and upper ureter in 12 cases (2 of them had multiple stones at different levels). The average number of treatment per a patient was 1.25, and that of shock waves delivered per treatment was 1798. Ultrasound localization has been effective in all cases. The rate of destruction of the stones was 100% in the kidney, 66.7% in the upper ureter, with an overall average of 95.0%. On the X-ray film obtained six weeks after ESWL treatment, the stone free rate was 53.5%, and the effectiveness rate was 89.1%, including the cases of stone free and cases with fragments smaller than 5 mm. No serious adverse effect was observed, although there were mild transient hematuria in all cases and pyrexia (more than 38.0 degrees C) in 7 cases (6.9%). The procedure was performed safely in the majority of patients without anesthesia. In 10 cases, we applied anesthesia (epidural anesthesia in 3 cases, and local anesthesia in 7 cases) for the prevention of pain. It is concluded that ESWL treatment using Sonolith 2000 Type B is as effective as other types of shock wave lithotriptor previously applied to urolithiasis without serious clinical complication.

Adult↗

[Serum concentration of laminin in renal cell carcinoma].

Serum concentration of laminin was measured radioimmunologically in 19 patients with renal cell carcinoma and 71 normal controls. The serum laminin levels of renal cell carcinoma patients were significantly higher than those of normal controls. After nephrectomy the elevated serum levels of laminin showed marked decreases in most of the patients without metastasis. By the immunofluorescent technique with LAM-1, a monoclonal antibody which is specific to laminin A and B chains , strong fluorescence was found in the extracellular matrix in renal cancer tissue. Taken all these facts together, renal cell carcinoma may be a laminin synthetic tumor. The average serum laminin level of the patients with a disseminated disease were significantly higher than that of the patients with a localized disease. The elevated serum level of laminin may play an important role in the process of tumor metastasis. Furthermore, our data suggest that elevated laminin levels may predict the subsequent course of a tumor condition. The monitoring of serum laminin level may be valuable for following-up of the course of renal cell carcinoma.

Adult↗

[Fast neutron radiotherapy of prostate cancer].

Between 1976 and 1987, sixty eight patients suffering from prostate cancer were treated with fast neutron radiotherapy at the NIRS hospital in Chiba, Japan. Tumor doses of TDF 100 were administered to the prostate gland, the regional lymphnodes, and the true pelvis, using the two opposing fields by fast neutron alone or with a boost. The overall local or regional tumor recurrence rate was found to be 10% and local control seemed to correlate with the histological differentiation of the cancer tissue, though there was no definite correlation with hormone treatment. A relatively high incidence of grade 3 and 4 radiation complications were observed, 21% for grade 3 and 7% for grade 4, due to subcutaneous fat necrosis caused by an inferior dose distribution of the fast neutron machine. The 5-year survival rate was seen to be 52% in total and 70% for patients in stage C. The modality of radiotherapy for prostate cancer is discussed.

Adenocarcinoma↗

[Citrate (CG-120) therapy for urolithiasis. 1. Clinical effects].

Urinary citrate is an important determinant for crystallization of calcium salts, and recently oral administration of citrate has been suggested to be clinically useful in the management of renal stone disease. The effect of CG-120, a citrate compound (potassium citrate, sodium citrate and citric acid) produced by Dr. Madaus (Germany), on upper urinary tract stones was investigated in 398 patients in this study group. The patients were treated with 3 or 4 g CG-120 daily. Two hundred thirty-one of them were treated accurately according to the protocol of the study for more than 32 weeks. The cumulative percentage of positive clinical effect for the stone (disappearance, passage or decrease in size) was 30.3% (70/231). There were no differences in the clinical effect between the group of 3 g/day and the group of 4 g/day. CG-120 seemed to be more effective in the cases of ureteral stone, young patients and females, but was less effective in the recurrent stone formers. Although there were 45 episodes of side effects in 38 patients in this study, no serious side effects attributed to CG-120 were experienced. CG-120 was proved as a useful drug in the treatment of upper urinary tract calculi as well as its prevention.

Adolescent↗

[Citrate (CG-120) therapy in urolithiasis. 2. Effect on urinary and serum biochemistry ].

The long-term effects of citrate therapy (CG-120, 3 g/day or 4 g/day) were examined in 398 patients with upper urinary tract calculi. We studied the influence of citrate therapy on urinary and blood biochemistry in 353 of them. CG-120 caused a sustained increase in urinary citrate, urinary pH and potassium, but no substantial or significant changes in other urinary parameters (uric acid, phosphate, oxalate, sodium, chloride and urine volume). Although urinary calcium decreased significantly up to the 24th week, it did not change significantly there after and it tended to increase at the 54th week. Urinary creatinine excretion decreased after 34 weeks of administration, but this phenomenon could not be explained, because the level of blood urea nitrogen and serum creatinine was not elevated in any case before administration. There were no changes in the serum calcium, magnesium, phosphate, uric acid, sodium, potassium or chloride level.

Blood Chemical Analysis↗

Intra-arterial chemotherapy for bladder cancer.

Intra-arterial infusion chemotherapy with adriamycin (ADM) was carried out in 32 patients with bladder cancer prior to total cystectomy. An oblique incision approximately 12 cm long was made in the gluteal region to expose either the superior or inferior gluteal artery, into which a Teflon catheter was inserted and fixed. The distal end of the catheter was taken out from under the skin in the precordial region. Via this catheter, a single dose of 10 mg ADM was injected twice a week. Superior-gluteal-artery infusion chemotherapy was performed in 7 patients; the 5-year survival rate was 14.3%, which was not as high as expected. Inferior-gluteal-artery infusion chemotherapy was performed in 25 patients. Cisplatin (CDDP) was used with ADM in 8 patients. Radiation and/or hyperthermia were used in 11 patients. The 5-year survival rate in these 25 patients was 58.4%, which was considered to be satisfactory. Of these 25 patients, 5 were stage-T4 cases; for these, the treatment was ineffective, and all 5 died within 2 years. Of the 6 patients at stage T2, 1 died, as did 1 patient with carcinoma in situ (CIS). Of the 13 patients with bladder cancer at stage T3, 3 died; lymph-node metastases were found in all 3 of these cases. Of the 25 patients who received inferior-gluteal-artery infusion chemotherapy, 9 died of cancer; all 9 died within 2 years due to distant metastases. There was no evidence of recurrence in any patient who survived for 2 years or more after total cystectomy. Therefore, inferior-gluteal-artery infusion chemotherapy may be effective as a preoperative adjuvant therapy with no serious side effects.

Antineoplastic Combined Chemotherapy Protocols↗