Cytoprotective roles of GSH, SOD and solcoseryl against ischemic damage and reperfusion injury to warm ischemic lung. Study of Canine warm ischemic lung.

This study was performed to clarify the roles of reduced glutathion (GSH), superoxide dismutase (SOD), and solcosaryl in ischemic damage and reperfusion injury to the warm ischemic lungs of experimental animals. Fifty-one warm ischemic canine lungs were made by hilar stripping and clamping of the left PA, PV and bronchus for 2-3 hours. In the Non-perfusion group, GSH (50mg/ kg, I. V.: Group II) and solcoseryl (50mg/kg, I. V.: Group III) were administered. In the perfusion group, Euro-Collins (E-C) solution (20ml/kg) was perfused (Group IV) and GSH (1mg/ml in E-C solution: Group V) and SOD (15mg/l in E-C solution : Group VI) were used for anti-oxidative drugs. The pulmonary arterial pressure and aortic pressure were measured and also blood gas analysis was made during the preischemic period , immediately after, one hour and 3 days after reperfusion. Small parts of pulmonary tissues were taken for pathological examination one hour and 3 days after reperfusion. Chest X-ray films were teken at 3 days after the operation. GSH, SOD, and solcoseryl effectively act as scavengers of active oxygen species (AOS) , especially in terms of oxygenation. In the group with anti-oxidative drugs, cytoprotective effects of the pathological and chest X-ray findings on ischemic damage and reperfusion injury were much more manifest rather than those in control groups

Intraoperative HFJV support during bronchoplasty

High frequency jet ventilation (HFTV) was experimentally studied to ensure intraoperative respiratory support at tracheo-bronchoplasty. On the condition of driving pressure of 5 to 15 PSI and frequency of 100 to 400 during bronch-plastic procedure, HFJV is of great help to shorter the operation time and to secure the anastomosis. And the arterial Po2 and Pco2, and pulmonary hemodynamics were kept satisfactory in the circumstances of intraoperative respiratory suppor

Benefit from omentopexy on bronchial wound healing in performing concurrent esophagectomy

The healing process of bronchial wound was compared among wrapping tissues such as pedicled omentum, pericardium, and parietal pleura in terms of the degrees of revascularization of the bronchial artery interrupted by bronchoplasty itself by microangiography, including the circumstances of performing a procedure of esophagectomy. The development of neovascularity was marked and facilitated by omentopexy. The procedure of wrapping by pedicled pericardium and pleura was not so useful for promoting neovascularity as would be expected, and it was almost the same as non-wrapping one. Meanwhile, recanalization by wrapping with free pleura was delayed. When esophagectomy was combined with bronchoplasty, revascularization was apparently retarded. In conclusion, wound healing at bronchial anastomosis was markedly impaired so that omentopexy was recommended for facilitating wound healing at anastomosis

Black-hole dynamics in BHT massive gravity

Using an exact Vaidya-type null-dust solution, we study the area and entropy laws for dynamical black holes defined by a future outer trapping horizon in (2+1)-dimensional Bergshoeff-Hohm-Townsend (BHT) massive gravity. We consider the theory admitting a degenerate (anti-)de Sitter vacuum and pure BHT gravity. It is shown that, while the area of a black hole decreases by the injection of a null dust with positive energy density in several cases, the Wald-Kodama dynamical entropy always increases.Comment: 7 pages, 1 figur

Effecs of cyclosporine on bronchial anastomotic healing in canine lung allograf t

Wound healing at bronchial anastomosis of the lung allograft in canine was compared between allografts prescribed with cyclosporine and/or azathioprine and autografts in terms of recanalization of bronchial artery, breaking strength and histologic findings. 1) Restoration of interrupted bronchial artery completed at the 14 day following transplantation in autografts and allografts with cyclosporine, although it has been retarded until day 21 when azathioparine was given. 2) Satisfactory breaking strength at anastomosis was equally measured in autografts and allografts with cyclosporine. In allografts with azathioprine, weakened breaking strength was noticed on day 14 with significant difference (p<0.05). 3) From the standpoint of histologic finding, cyclosporine is of benefit to eliminate inflammatory response and to promote collagen production which was essential to good wound healing

Surgery for myasthenia gravis

The effect of thymectomy on myasthenia gravis was evaluated in the 48 patients with thymectomy for myasthenia gravis in the First Department of Surgery, Nagasaki University School of Medicine. The surgical approaches were done by midsternotomy in 44, by right thoractomy in 3 and by transcervical route in 1 respectively. As a rule, extended thymectomy was mainly applied. The disease stages in most cases included the types of Osserman II b and/or II a. The effect of thymectomy on myasthenia gravis was compared between the patients with and without thymoma. The effect of thymectomy for patients without thymoma was superior to that for patients with thymoma. There was no close relationship between the suffering time and the effect of thymectomy. Interestingly enough, the surgical outcome for those who had moderate or severe formation of germinal center in the resected thymic glands was not satisfactory and some aggravated following thymectomy

Carcinoma-containing CEA in colon cancers in primary and metastatic tumors

Carcinoma-containing CEA was measured as compared with normal tissues and metastases in the lymph nodes and the liver. The high CEA production was remarkable in the potent malignant tumors and metastases in the liver and the lymph nodes as compared with those in normal colon tissues as well as in non metastatic lymph nodes. It is reasonable to consider that high plasma CEA may well indicate advancing or highly potent malignant diseases or recurrence of colon cancers due to destruction of vascular structure by cancer invasion

Histological evaluation of cancer extension along the bronchial wall in lung cancer.

The surgical specimens obtained from 39 cases in which primary lung cancers were situated in the central portion proximal to subsegmental bronchi were histologically examined as to how long cancer lesions extend along the bronchial wall, based on grossly visible lesions in the mucosa. Of 34 cases, 87% showed proximal cancer extension along the bronchial wall. The mode of cancer spread was mainly adventitioal extension and the distence was within 20mm of the sites of grossly visible lesions in the mucosa. In cases with involvement of the mediastinal lymph nodes and/or carcinoma of undifferentiated histological type, there was a tendency to spread widely. When cancer was located in the orifice of the lobar bronchus, the peripheral cancer spreading was obvious. Based on these results, it is concluded that the site of resection of the bronchus should be 20mm distant from macroscopically recognizable cancer changes in the mucosa. In most cases (71.4%), however the extent of invasion in the bronchial wall was less than 10mm from such changes

Tumor-containing CEA in Colon Cancers

Carcinoembryonic antigen (CEA) in serum and fresh cancer tissue taken at surgery was measured and analyzed in terms of the disease stage. The CEA level in serum (s-CEA ) has become higher with advance in the disease stage. However, in stage V it was lowered as well as CEA level in cancer mass (ca-CEA). It is suggested that S-CEA is influenced by cancer invasion into the vessel wall, tumor necrosis and/or degeneration which ca-CEA may well be migrated from the tumor cells

Altrenogest during early pregnancy modulates uterine glandular epithelium and endometrial growth factor expression at the time implantation in pigs

This study evaluated the effects of supplying altrenogest from day 6-12 of pregnancy on the endometrial glandular epithelium, corpora lutea (CL) morphology, and endometrial and CL gene expression. A total of 12 crossbred females (Landrace × Large White) were used. The females were assigned to 4 treatments according to a random design with a 2 × 2 factorial arrangement, with two categories (sow or gilt) and two treatments (non-treated and treated with altrenogest). On day 6 of pregnancy, animals were allocated to one of the following groups: non-treated (NT, n = 6; 3 sows and 3 gilts), and (T, n = 6; 3 sows and 3 gilts) treated daily with 20 mg of altrenogest, from day 6-12 of pregnancy. All animals were euthanized on day 13 of pregnancy. All CLs were individually weighed, and their volume were determined. The endometrial glandular density (GD), mean glandular area (MGA), and vascular density (VD) were determined by histomorphometric and immunohistochemical analyses. Endometrium samples were collected and analyzed by qRT-PCR to evaluate the abundance of transcripts for VEGF and IGF-I. Females in the T group had higher MGA (P < 0.05) compared to the NT group. There was no effect of treatment on GD or VD for both experimental groups. Sows in the T group had augmented expression of IGF-I (P < 0.05). Progestagen had no detrimental effect on CL morphology. In conclusion, altrenogest improves the uterine environment during the peri-implantation period in pigs without compromising corpora lutea development