Do immunosuppressants directly affect neutrophils, resulting in protection of the liver against ischemia-reperfusion injury?
Explore the source record for details and available documents.
Animals↗
Biomedical subjects
E Kobayashi
Publications and source records attributed to E Kobayashi.
Urinary excretion levels of sodium and potassium in environmental cadmium-exposed subjects.
The urinary excretion levels of sodium (Na) and potassium (K) in cadmium (Cd)-exposed subjects as related with urinary beta2-microglobulin (beta2-MG) and Cd concentrations were investigated. The target population comprised of 3164 inhabitants of Japan who were more than 50 years of age and who lived in cadmium-polluted areas and 294 inhabitants who lived in non-polluted areas of Japan. A significant increase in urinary excretion of K was shown in Cd-exposed subjects although there was no significant difference in urinary excretion of Na between the Cd-exposed and non-exposed subjects. Urinary K concentrations in both sexes were significantly correlated with age, urinary beta2-MG and Cd concentrations by multiple regression analysis. Urinary Na concentration was significantly correlated with age, beta2-MG and Cd in men, but in women it was significantly associated with only the urinary beta2-MG concentration. The present study demonstrated that increased K excretion was a more sensitive effect of cadmium exposure than increased Na excretion.
Aged↗
Dose-dependent reduction of bile secretion in cyclosporine-treated rats.
Explore the source record for details and available documents.
Animals↗
Treatment of hepatic metastasis of the colon26 adenocarcinoma with an alpha-galactosylceramide, KRN7000.
Colorectal liver metastasis is clinically a major problem. We examined the antitumor activity of KRN7000, an alpha-galactosylceramide, on mice with liver metastases of adenocarcinoma Colon26 cells. KRN7000 treatment, beginning 1 day after tumor inoculation (day 1), significantly inhibited tumor growth in the liver, and its potency was equal to that of interleukin 12. KRN7000 treatment from day 3 caused regression of established Colon26 nodules. KRN7000 administration resulted in a high percentage of cured mice that acquired tumor-specific immunity. In addition, it appeared that highly activated, liver-associated natural killer cells made the major contribution to the killing of Colon26 cells in the liver. These results suggest that KRN7000 may be useful for the treatment of colorectal liver metastasis.
Adenocarcinoma↗
Recovery from lymphocytopenia and prognosis after adult extracorporeal membrane oxygenation.
Extracorporeal circulation severely impairs the host immune system. Also decreases in circulatory lymphocytes correlate with greater degrees of surgical damage. In this study, the pattern of recovery from lymphocytopenia after extracorporeal membrane oxygenation was retrospectively evaluated from a prognostic viewpoint. The results showed that the circulatory lymphocyte count of survivors returned to normal levels within 5 days after their being weaned from extracorporeal membrane oxygenation, while the circulatory lymphocyte count of nonsurvivors remained at low levels. Because it is easy to measure the number of peripheral lymphocytes, the changing pattern of the circulatory lymphocytes might be a simple and reliable prognostic factor after extracorporeal membrane oxygenation.
Aged↗
Technical details for safer venous and biliary anastomoses for liver transplantation in the rat.
Although orthotopic liver transplantation in the rat is a well-established experimental model, no detailed illustrated description of the procedure is available in the literature. As a result, achieving success in the technique without prolonged learning time requires training in specialized centers where the step-by-step details essential to success in the technique can be learnt. The aim of this paper is to provide beginners with the culminative experience of 15 years of improvements made to Kamada's original model, clearly illustrating the necessary steps and fine detail of each anastomosis to help beginners avoid unnecessary complications. We hope that this complete description of orthotopic liver transplantation in the rat, which remains the most difficult rodent transplant model to master, will greatly help microsurgeons acquire this demanding procedure.
Anastomosis, Surgical↗
New technique of complete thymectomy in adult rats without tracheal intubation.
Adult rat thymectomy is frequently performed as part of the protocol for experiments in transplant immunology. Current methods used are either imprecise (suction methods) or require tracheal intubation (surgical technique) and are thus difficult to master. We have developed a safe technique of surgical removal of the thymus with resolution of any pneumothorax by suction through the xyphoid insertions of the diaphragm. This method is easy to learn and gives a 95% success rate.
Animals↗
Auxiliary heterotopic liver transplantation in the rat: a simplified model using cuff technique and application for congenitally hyperbilirubimemic Gunn rat.
To study the immunological and metabolic effects of auxiliary liver transplantation (ALT), a simple ALT model in rats was developed using the cuff application. Effects of transient parking of normal liver were tested in congenitally hyperbilirubinemic Gunn rats. Serum bilirubin concentrations in Gunn rats, transplanted heterotopically with normal livers of Wistar rats, were dramatically reduced and maintained within normal levels. The graftectomy was performed safely 1 month after transplantation, but total bilirubin levels did not return to the preoperative value of the Gunn rats. It is possible that hepatic stem cells included in ALT liver migrated to the host liver and differentiated into cells capable of producing certain enzymes.
Analysis of Variance↗
Changes in immune-endocrine response after surgery.
The authors evaluated the relationship between hormonal and cytokine responses after surgery. Patients who underwent thoracic oesophagectomy (O group; n = 7), pulmonary lobectomy (P group; n = 5), modified mastectomy (M group; n = 5) and laparoscopic cholecystectomy (LC group; n = 7), were randomly selected. Circulating neutrophil and lymphocyte numbers were assayed. Changes in the concentration of the hormones [adrenocorticotrophic hormone (ACTH), cortisol, and antidiuretic hormone (ADH)] and cytokines [tumour necrosis factor alpha (TNF-alpha), interleukin 1 beta (IL-1 beta), IL-6, and IL-10] were analysed. In O and P groups, neutrophils were still seen on post-operative day (POD) 3, while the leukocyte counts of M and LC groups returned to normal. The number of lymphocytes significantly decreased on POD1 and POD3 only after oesophagectomy. The pattern of hormonal levels was consistent in all groups. While TNF-alpha and IL-1 beta were undetectable in the peripheral blood, the concentration of IL-6 and IL-10 increased in O and P groups, but not in M and LC groups. The degree of lymphocytepenia and neutrophilia correlated well with the extent of surgical trauma.
Adrenocorticotropic Hormone↗
Association between renal effects and cadmium exposure in cadmium-nonpolluted area in Japan.
Renal effects of cadmium exposure in people living in a cadmium-nonpolluted area in Japan were investigated. The population consisted of 1501 inhabitants (558 men and 743 women) over 50 years of age. Urinary cadmium was employed as an indicator of internal dose, and total urinary protein, beta 2-microglobulin, and N-acetyl-beta-glucosaminidase were used as indicators of renal dysfunction. Multiple regression analysis and a logistic regression analysis were performed to study the relationship between urinary cadmium excretion and these indicators of renal dysfunction. In both procedures, urinary cadmium concentrations were significantly associated with indicators of renal dysfunction. These results suggest the existence of renal dysfunction induced by exposure to environmental cadmium in a cadmium-nonpolluted area in Japan.
Acetylglucosaminidase↗
Timing of lymphocyte transfusion and portal clamping for the development of lethal graft-versus-host disease in the rat.
The effects of surgical intervention on the incidence and augmentation of graft-versus-host disease (GVHD) were studied in the rat. To elicit GVHD, splenocytes from parental LEW rats at a dose of 4 x 10(8) or 1.5 x 10(8) cells/350g body weight were injected via the tail vein into (LEW x BN)F1 rats. The injection of 4 x 10(8) of LEW rat splenocytes induced lethal GVHD in all nontreated F1 rats, while 1.5 x 10(8) of LEW splenocytes did not induce any signs of GVHD. However, when the F1 rats had received the same dose of parental LEW lymphocytes in combination with portal clamping, 14 recipients out of the 15 rats (93%) suffered GVHD and 10 rats (67%) died from GVHD. Interestingly, portal clamping 7 days after the injection enhanced the incidence of GVHD, whereas no GVHD was observed in the intervention group either 3 or 7 days prior to the cell transfusion. When 1.5 x 10(8) of allogeneic lymphocytes were injected intravenously together with 0.1-1.0 mg/kg of endotoxin instead of portal clamping, the injection led the early death by GVHD, while the injection of methylpredonisolone did not enhance GVHD. These results thus indicate that either simultaneous or delayed surgical intervention has the potential to trigger a dormant state in transferred alloreactive lymphocytes.
Animals↗
Endoscopic findings in transplanted allo-intestine of rats after discontinuance of immunosuppressive agent.
In clinical practice, graft rejection in small-bowel transplantation should be diagnosed before irreversible condition of the graft. We have already reported the usefulness of endoscopic examination for the early detection of acute rejection in a rat model. Here we evaluated rejection after discontinuance of methyl-deoxyspergualin by endoscopy. Heterotopic small-bowel transplantation was performed by the cuff method from a DA to a LEW rat. Endoscopic and histological examinations were performed through the stomas. Two-week administration of methyl-deoxyspergualin significantly prolonged graft survival. Graft rejection after discontinuance of the agent occurred much more slowly than rejection without the immunosuppressive drug. Erosive mucosal changes were endoscopically observed in the early phase of rejection in rats that did not receive the immunosuppressant. However, endoscopic findings after discontinuance of methyl-deoxyspergualin indicated edematous changes and thickening of the wall without erosion, and, histologically, the grafted intestine showed slowly-progressing rejection with flattened villi. If we pay attention to edematous changes and hardening of intestinal wall, and take selective biopsies, endoscopic examination may improve the early diagnosis of slowly progressive rejection in the clinical setting.
Animals↗
CT and MR presentation of acute hemorrhage in a spinal schwannoma.
We present a case of a 58-year-old woman who experienced the sudden onset of a deteriorating paraparesis after physical exertion. Pathologic specimens revealed that an intracystic hemorrhage existed within a spinal schwannoma. The radiologic presentation of the intracystic hemorrhage on computed tomography (CT) and magnetic resonance imaging (MRI) is described.
Acute Disease↗
An autopsied case of Creutzfeldt-Jakob disease with the lateral geniculate body lesion showing antagonizing correlation between periodic synchronous discharges and photically induced giant evoked responses.
We reported an necropsy finding of a patient with Creutzfeldt-Jakob disease (CJD) who showed photo-stimulated giant spikes that simultaneously suppressed periodic synchronous discharges (PSD) and the loss of pupillary light reflex during the course of the illness. The necropsy revealed extensive gray and white matter lesions, and both the lateral geniculate body (LGB) and pregeniculate body were primarily affected. The superior colliculus, optic nerve and tracts were not affected. The cerebral cortices particularly of the occipital lobe were severely damaged. The Gennari line, however, was spared from lesion. The primary involvement of the LGB has been reported infrequently in CJD, however, it appears to be associated with the unusual electroencephalograph (EEG) feature of the present case. The pregeniculate lesion contributed to the loss of pupillary reflex. This finding indicates that the visual pathway may be involved in the mechanism of the generation of PSD in CJD.
Action Potentials↗
Platelet protective effect of TAK-029, a novel glycoprotein IIb/IIIa antagonist: an in vitro study.
Previous studies have indicated that exposure of fibrinogen receptors associated with the glycoprotein IIb/IIIa complex contributes to platelet loss during cardiopulmonary bypass. TAK-029 is a newly developed reversible, nonpeptide inhibitor of platelet glycoprotein IIb/IIIa receptors. In this study, we tested the platelet preserving effect of TAK-029 in an in vitro model. The methods included the comparison of the release of beta-thromboglobulin (beta-TG) between a TAK-029 group (n = 5) and a control group (n = 5) in a mock circulation under a shear force generated by a centrifugal pump. To evaluate the degree of beta-TG release, deltabeta-TG/deltaT was calculated where deltabeta-TG is the increase in beta-TG and deltaT is the time. The results showed that the value of deltabeta-TG/deltaT in the TAK-029 group was significantly lower than it was in the control group (4.22 +/- 0.27 x 10(2) ng/ml vs. 7.33 +/- 0.66 x 10(2) ng/ml, respectively). In conclusion, TAK-029 reduced the platelet activation under the shear forces of an in vitro model, suggesting that TAK-029 is a potential candidate for platelet protection during cardiopulmonary bypass.
Blood Platelets↗
A potential risk of sublingual nifedipine treatment in surgically treated patients in Japan.
Explore the source record for details and available documents.
Administration, Sublingual↗
Time-dependent cyclosporine A-induced nephrotoxicity in rats.
1. We investigated the toxicity of cyclosporine A (CsA) with reference to the timing of its administration in rats. 2. To elucidate the time-dependent effects of CsA on renal function and survival rate, CsA (75 mg/kg per day) or vehicle was orally administered once daily at four different times (3, 9, 15 and 21 h after lights on; HALO) over a period of 21 days to male Wistar rats (n = 56) kept in rooms with a 12 h light-dark cycle. 3. On the 7th day after treatment, creatinine clearances (Ccr) of groups dosed at 3 and 9 HALO (inactive period) were not reduced in comparison with clearances of time-matched control rats, whereas Ccr significantly decreased in rats dosed at 15 and 21 HALO (active period). Cyclosporine A markedly increased urinary N-acetyl-beta-D-glucosaminidase (NAG) excretion in all dosed groups at the 7th day after treatment, except for rats dosed at 3 HALO. In rats dosed at 3 HALO, Ccr decreased progressively; however, it did not decrease progressively in rats dosed at 9 HALO. In surviving rats treated during the inactive period, urine NAG subsequently returned to control levels. Survival rates were greater in animals dosed during inactive periods than those in groups dosed during active periods. 4. Significant differences in CsA-induced toxicity were obvious as a result of the timing of its administration. A different time course between Ccr and urine NAG excretion was observed during repeated CsA administration. Degenerative changes in proximal tubules were demonstrated after chronic administration of CsA, suggesting that severe and persistent tubular damage cannot be assessed by urinary NAG excretion.
Acetylglucosaminidase↗
Effect of fibrin glue on small and large bowel anastomoses in the rat.
Fibrin glue has been used as a hemostatic and adhesive agent for many years, but its efficacy in digestive surgery is still controversial. In this study, we evaluated the effect of fibrin glue on the healing of the small and large bowel anastomotic portions by measurement of the anastomotic bursting pressure. Further, the efficacy of fibrin glue in preventing intra-abdominal adhesion formation was assessed. Our results indicated that fibrin glue enhanced the resistance towards an elevation of intraluminal pressure in small bowel, but not in large bowel. Concomitantly, the glue did not significantly attenuate postoperative adhesion formation. A sealing action of fibrin glue might protect against bleeding and microleakage, resulting in beneficial effects on small bowel anastomosis.
Anastomosis, Surgical↗