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Biomedical subjects

P Rudziński

Publications and source records attributed to P Rudziński.

At least 19 recordsLinked to original sources
PubMed2005

Superoxide dismutase activity and expression in human venous and arterial bypass graft vessels.

UNLABELLED: Venous bypass grafts are more prone to accelerated atherosclerosis than arterial grafts, which is partly related to increased oxidative stress and diminished nitric oxide bioavailability. In veins superoxide production is dependent primarily on nox2 NAD(P)H oxidase expression, while in arteries nox4 appears to play an important role. This may in part explain differences in susceptibility to graft failure. Net levels of oxidative stress are however determined in parallel by the production as well as by degradation of free radicals (eg. by superoxide dismutases, catalases, thioredoxins etc). The differences in superoxide dismutase (SOD) expression and activity in human bypass conduit vessels remain unclear. Accordingly, we aimed to compare SOD activity and protein levels as well as its functional effects on superoxide production in segments of human internal mammary arteries (IMA) and saphenous veins (HSV) from patients undergoing bypass graft surgery (n=24). SOD activity was assessed by inhibition of pyrogallol autoxidation, Cu-Zn SOD and Mn SOD protein levels were studied by immunoblotting. Basal superoxide release was detected by lucigenin (5 microM) enhanced chemiluminescence. Total SOD activity did not differ significantly between HSV and IMA. Similarly, no difference was observed in SOD activity in the presence of KCN (Mn-SOD). Human bypass conduit vessels show amounts of Cu-Zn SOD or Mn-SOD protein levels. In both HSV and IMA segments superoxide production was more than doubled in the presence of SOD inhibitor-DETC. CONCLUSIONS: These studies suggest that the differences in oxidative stress between human arteries and veins are unlikely to be caused by SOD activity. However SOD plays and important role in amelioration of oxidative stress in both types of vessels.

Coronary Artery Bypass↗
PubMed2001

[Risk of hypertension after heart transplantation in the follow-up period].

From October 1988 to March 2000, 58 patients underwent orthotopic heart transplantation (HTX). Data of 220 heart recipients with the follow up > or = 3 months after HTX were analyzed using the average values of blood pressure measured with the sphigmo-manometer. 65% of patients were diagnosed with the hypertension (HA). 39.9% of those patients (NTA group) had the systolic blood pressure < or = 140 mmHg and diastolic blood pressure < or = 90 mmHg during pharmacotherapy. 60.1% of hypertensive patients (NTB group) had the systolic pressure > 140 mmHg and/or diastolic pressure > 90 mmHg despite pharmacotherapy. 35% of all patients had normal blood pressure after HTX (HNA group). Patients with hypertension were older and the end stage ischemic cardiomyopathy was more frequently indication for HTX. Significantly more females were in NTA group. We observed no influence of the daily dose of cyclosporine or other immunosuppressive drugs on HA. The average blood concentration of cyclosporine A and mycophenolate mofetil was similar in all groups. The calcium channel blockers and inhibitors of angiotensin converting enzyme were main tool of pharmacotherapy used. In NTA group calcium channels blockers were used more frequently. In NTB group there was a statistically significant higher blood level of creatinine. After HTX there is a high risk of HA, which: increases with age, with the ischemic cardiomyopathy as indication to HTX, is significantly higher in males, there is no correlation between HA and the dosage and blood level of cyclosporine, increases with kidney insufficiency. In monotherapy calcium channel blockers seem to be especially effective.

Adolescent↗
PubMed2001

[Primary lung hemangiopericytoma--a rare neoplasm with a long course of recurrence over many years].

Hemangiopericytoma (HPC) is a rare neoplasm arising from pericytes that occur mostly around smaller vessels. Up to now only about 100 cases have been reported to arise primarily in the lung. The behavior of pulmonary hemangiopericytomas is difficult to predict and all tumors should be considered potentially malignant, even though the criteria for malignancy are not well developed. The diagnosis of HPC is known to confound even experienced pathologist. Pericytes lack readily identifiable morphologic features, therefore hemangiopericytomas are often confused with other soft tissue tumors that may have hemangiopericytoma--like pattern. We report a rare case of primary HPC of the lung with an asymptomatic, long course of the disease. The diagnosis of hamartoma was established after the first operation. Subsequently, seven years later, a chest radiograph revealed new lesions. Histological examination, including immunohistochemistry lead to the final diagnosis of hemangiopericytoma. The small number of cases of primary pulmonary hemangiopericytoma makes it difficult to define the correct histopathological diagnosis especially without modern methods.

Aged↗
PubMed2000

Changes in myocardial perfusion after transmyocardial laser revascularization in patients with end-stage angina pectoris.

The purpose of the present study was to analyze the effects of transmyocardial laser revascularization (TMLR) on myocardial perfusion. The value of (99m)Tc-MIBI scintigraphy in the detection of changes in perfusion of the lased and nonlased segments was assessed as well. In 15 patients before TMLR and then 3 and 6 months afterwards, MIBI scintigraphy and a stress test were carried out. At the beginning of the study, all patients were classified as having angina pectoris class III or IV (according to the criteria of the Canadian Cardiac Society); their ejection fraction was >30%. The parameters of the stress test increased significantly in 70% of the patients. Cardiac scintigraphy revealed improved perfusion of 33.7% of the transient defects within 3 months after TMLR which persisted at 6 months with a clear trend towards further improvement in the lased segments. TMLR has been found to be particularly beneficial in patients in whom other invasive methods of treatment cannot be applied.

Aged↗
PubMed1999

Lung carcinoids. Tumor angiogenesis in relation to clinicopathologic characteristics.

OBJECTIVE: To evaluate the prognostic value of carcinoid angiogenesis for the presence of lymph node metastases, histologic subtype and tumor size. STUDY DESIGN: The study group consisted of 72 resected primary lung carcinoids, 57 typical and 15 atypical. TNM staging was performed. The histologic criteria for carcinoids was based on the Flieder classification. Angiogenesis, expressed as tumor microvessel density, was estimated in sections stained with CD34 antibody, according to Weidner's method. RESULTS: The size of carcinoids was related to the histologic type: the average tumor diameter of typical carcinoids was significantly smaller than the average diameter of atypical carcinoids (P = .003, U = 207, Z = -3.023). Atypical carcinoids represented a more aggressive form of tumors than typical carcinoids; patients with typical carcinoids developed lymph node metastases less frequently (10% vs. 33%) as compared to patients with atypical carcinoids; the difference was statistically significant (P = .032). Tumor angiogenesis failed to distinguish the histologic type of carcinoids and did not indicate the presence or absence of regional lymph node metastases; neither did pTN stage or tumor size. CONCLUSION: Angiogenesis is not a determining factor of the metastatic potential of pulmonary carcinoids.

Adolescent↗
PubMed1998

[Coronary bypass grafting after failed percutaneous angioplasty (PTCA)].

Between January 1991 and September 1997, in the Cardiovascular Surgery Department of the Institute of Cardiology of Jagiellonian University Medical School, 23 patients underwent emergency CABG due to acute myocardial ischaemia in result of failed PTCA. Over the same period of time invasive cardiologists performed 1883 PTCAs out of which 23 (1.2%) were emergency cardiosurgical procedures, and in 38 patients, stents were implanted in the damaged coronary arteries. The patients' age ranged from 37 to 67 years (median 52.2). In all patients good left ventricular function was preserved, median ejection fraction being 64%. Two patients required IABP to support left ventricular function. 1-4 bypass grafts were implanted (median 1.9 per patient). In one patient, internal mammary artery was collected and then implanted into anterior interventricular branch. The most common complication was myocardial infarction which occurred in 12 patients (52%). In ten patients low output was observed postoperatively. One operated patient (a female died (4.3%). The mean time of hospitalization was 11 days. Emergency myocardial revascularisation procedures performed after failed PTCA, bring higher risk of mortality and dangerous postoperative complications.

Adult↗
PubMed1998

The incidence of malignancy in heart transplant recipients.

OBJECTIVES AND METHODS: 219 heart transplant recipients with survival over 3 months were retro- and prospectively analysed for the incidence of primary neoplasms. Patients received immunosuppressive drugs (cyclosporine A, azathioprine, steroids) with a 4-5 days induction course of Rabbit Anti-Thymocyte Immunoglobulin (RATG) or monoclonal antibodies induction /OKT3/ in some cases. Anti-rejection treatment consisted of pulse doses of methyloprednisolon or RATG. RESULTS: 9 cases of malignancy (4.1%) with one case of pre-malignant liver condition (dysplasia gigantocellulare, 0.45%) were found (8M; 1F; age: 45-67 y.o., x57.7). Symptoms of neoplasms occurred 7-79 months (x31.4) postoperatively. Skin carcinomas: planoepitheliale, spinocellulare, soft tissue neoplasms/mesenchymal sarcoma, larynx Ca planoepitheliale, lung: adenocarcinoma and Ca microcellulare, kidney Ca clarocellulare and post transplant non-Hodgkin lymphoma were diagnosed. Chemo- and radiotherapy, surgery and reduction of immunosuppression did not change the outcome of malignancy in 6 pts.; (regression-1 pt was., remission-2 pts). Patients died 7-86 months after Htx (x41), 4-25 mos. (x12.5) after suffering from first symptoms and 0-10 months (x4.9) after pathology-based diagnosis of neoplasm. CONCLUSIONS: Heart transplant recipients have an increased risk of carcinogenesis. The incidence of malignancies in the studied group is similar or even lower than in other reports.

Adult↗
PubMed1998

[Early and late results of surgical treatment for bronchial carcinoids].

UNLABELLED: The aim of the study was to evaluate the efficacy and safety of surgical treatment of the bronchial carcinoids. Between 1983 and 1996 52 patients (pts) with typical carcinoid were operated. The group consisted of 23 males and 29 females aged from 20 to 68 years (mean 41.3 years). In the chest X-ray and CT scan round shadow were found in 21 (40.4%) cases, lung tissue atelectasis in 23 (44.1%) cases. The bronchial tree was normal in fiberoptic bronchoscopy in 8 cases. We performed 4 pneumonectomies, 3 wedge resection and 45 lobectomies (including 5 "sleeve" lobectomies). We haven't recorded any early post-op deaths. Only two pts (3.8%) developed post-op complications--cardiac arrhythmias. In two cases the surgical treatment was followed by radiotherapy for metastases in regional lymph nodes. The period of follow-up ranged from 3 to 166 months (mean 62.2 months). During that time we noticed the recurrence of tumor in 2 pts (3.8%). One patient died from cardiac reason. The 5-year survival among patients operated in the period 1983-1992 was 91.2%. The 10-year survival in the group of pts operated on between 1983 and 1987 was 90%. CONCLUSION: The surgical treatment of bronchial carcinoid is method of choice, very efficient and safe.

Adult↗
PubMed1998

[Typical and atypical pulmonary carcinoids--pathologic and clinical analysis of 77 cases].

Neuroendocrine tumors of the lung represent a group of controversial pulmonary neoplasms regarding their classification, criteria for diagnosis, predictors of future behavior, and therapy. The histologic criteria for their classification rest heavily on the proposed by Arrigoni et al. in 1972, for atypical carcinoid (AC). According to these authors AC has mitoses between 5 and 10 per 10 high power fields (HPF), necrosis, hypercellularity and disorganized architecture. The survival analysis performed by Flieder et al. (1997) for a variety of clinical and histologic features revised the histologic criteria for separating AC from typical carcinoid (TC) and proposed a range of mitotic counts between 2 and 20 per HPF for AC. From 1978 until 1997, 77 resected pulmonary carcinoids were reclassified for TCs and ACs according to Flieder's et al. histologic criteria. The clinical and pathological various features were studied for the group of 62 TCs and 15 ACs. 77 patients (pts) entered the study: 29(38%) males and 48(62%)females; mean age 43 years, range 18-75 years, 46 pts underwent lobectomies, 16 bilobectomies, 12 pneumonectomies and 3 wedge resections. The patients with TC were younger than those with AC (males: 40 vs 50 years and females 42 vs 49 years). TCs were significantly smaller than ACs (mean diameter respectively: 24 mm vs 33 mm). Fifty four (87%) of TCs and all ACs had central localization. The time of patients observation ranged from 2 months to 18 and half years; 2 patients with TC died due to tumours progression; 3 due to other diseases. Regional lymph node metastases occurred in 10% TCs and 33% ACs (p = 0.032). The heterotopic bone formation appeared in 11(18%) TCs and 2(13%) ACs. The mitotic counts for AC range between 2 and 6 per 10 HPF, accompanied by small foci of necrosis in 2 cases. Peripheral carcinoids showed a spindle-cell morphology. The performed study has highlighted the new concept of the carcinoids classification and the importance of the mitotic counts as histologic criteria for AC diagnosis. The data based on the largest in Polish literature lung carcinoids collection.

Adolescent↗
PubMed1998

Inhibition of angiogenesis by sulindac and its sulfone metabolite (FGN-1): a potential mechanism for their antineoplastic properties.

The nonsteroidal antiinflammatory drug sulindac (sulfoxide) is known to cause regression and prevent recurrence of adenomas in patients with familial adenomatous polyposis. The mechanism of action does not appear to require inhibition of prostaglandin synthesis since the sulfone metabolite of sulindac (FGN-1) retains the antineoplastic properties of sulindac but lacks inhibitory effects on cyclooxygenase, types 1 and 2. FGN-1 has been shown to induce apoptosis in a variety of tumor cell lines, and selective apoptosis of neoplastic cells has been proposed to account for its antineoplastic properties. Since angiogenesis is necessary for tumor progression and may be related to apoptosis, it is possible that inhibition of angiogenesis may also contribute to the antineoplastic properties of sulindac or FGN-1. In order to test this possibility, cells derived from several different types of human lung tumors were grafted intradermally in Balb/c mice. Sulindac sulfoxide and its sulfide and sulfone metabolites were administered for 3 days orally, in a daily dose of 0.025-0.5 mg, and angiogenesis was measured after 72 h using a previously described method. The results showed that sulindac sulfoxide and sulfone statistically inhibited angiogenesis.

Adenocarcinoma↗
PubMed1997

Prolidase activity and beta 1 integrin expression in moderately and poorly differentiated lung adenocarcinomas.

Primary human lung adenocarcinomas were divided into two groups according to the degree of histologic differentiation: G2-moderately and G3-poorly differentiated tumors. Each group was compared with normal lung tissue in respect to prolidase activity, its ability to interact with specific antibody, free proline and beta 1 integrin subunit content as well as ability of beta 1 integrin subunit to interact with specific antibody. It was found that prolidase activity in lung adenocarcinomas G3, was significantly elevated in comparison to normal lung tissue. In lung adenocarcinoma G2 no significant changes in the enzyme activity were observed. Increase in the enzyme activity was accompanied by increase of free proline content in the tissues. The western blot analysis revealed that prolidase of lung adenocarcinomas is identical to prolidase originated in control lung tissue. It was noticed that elevated activity of prolidase in adenocarcinomas G3 was accompanied by its high expression. In respect to beta 1 integrin expression, known to play an important role in metastasis, no difference was found between adenocarcinoma groups and the control lung tissue. The presented data suggest that the level of prolidase activity in lung adenocarcinoma may serve as a more sensitive marker for the histologic degree of malignancy, than the level of beta 1 integrin expression.

Adenocarcinoma↗
PubMed1997

Screening of angiogenesis inhibitors by modified tumor-induced angiogenesis (TIA) test in lung cancer.

Aberrant angiogenesis-the new vessels formation is a mandatory event in the process of tumor growth and expansion. Studies on mechanisms involved in tumor-induced angiogenesis (TIA) and on its possible inhibitors are needed in order to introduce in future new methods of tumor treatment. The aim of our study was to determine the usefulness of the modified cutaneous TIA (mice without immunosuppression) test for screening in vivo of the angiogenesis modifiers. In both models (classical and modified TIA) we demonstrated comparable angiogenesis activity following human lung cells inoculation and similar degree of neovascularization response inhibition caused by theobromine. We reported that in modified TIA model preincubation with theobromine significantly suppressed angiogenic potential of human lung cancer cells as well as the ability of those cells to produce proangiogenic cytokine-bFGF.

Adenocarcinoma↗
PubMed1997

[Five year survival of patients treated surgically for lung neoplasms].

The results of surgery for lung cancer performed in 1981 and respectively in 1991 were compared in regards to 5 years survival time. Most centers of thoracic surgery in Poland participated in the study. In 1981 728 patients underwent surgery for LC and in 1991-1141 had some kinds of lung resection for LC. The improvement rate of 17% in regards to 5 years survival time was achieved in the latter period.

Humans↗
PubMed1996

[Examination of thyroxine conversion to triiodothyronine in the lungs (preliminary report)].

Presence of triiodothyronine's receptors has been confirmed in majority of cells constituting lung architecture. The purpose of the investigation is the estimation of the conversion of the thyroxine through examination the activity of deiodinase I in the lung. The material in the form of 2.0-3.0 g lung pieces was taken in therapeutic thoracotomy from patients with emphysema, and in non-small cell lung cancer (n.s.c.l.c.). The examination of the activity of deiodinase I in chronic pulmonary diseases can help to show one of the elements of euthyroid sick syndrome (e.s.s.). The correlation between the deiodinase I activity in neoplastic tissue and the extent of the process of n.s.c.l.c. may provide the necessary data about the behaviour of triiodothyronine receptors which are closely related to oncogenes. The deiodinase I activity may be considered as a marker of lung cancer.

Biomarkers, Tumor↗
PubMed1996

Successful full-term pregnancy in a patient three and a half years after a heart transplant.

The patient is a 28 year old woman who received a heart transplant in 1992 secondary to hypertrophic cardiomyopathy with unremarkable post-operative course. In the period immediately post transplantation the patient was on a four-drug immunosuppressive regimen which was subsequently changed to standard three-agent therapy. This therapy was continued until the patient became pregnant. In the first trimester only Cyclosporine (CsA) was used, and thereafter, the patient was continued on the previous three agent regimen. Toward the end of pregnancy a rise in systolic pressure was observed, but the child was delivered by spontaneous vaginal delivery without complications in the 38th week of pregnancy. The newborn weighed 3320 g and was in good health. A sharp fall in the newborn CsA blood levels was observed post delivery reaching zero level on the third day of life. At the present time, both mother and baby are in good health, 6 weeks after delivery.

Adult↗