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Biomedical subjects

P A Belloni

Publications and source records attributed to P A Belloni.

At least 19 recordsLinked to original sources
PubMed1992

Effect of SCH 37224 on anti-IgE-induced formation of sulfidopeptide leukotrienes in human lung parenchyma.

SCH 37224, 1-(1,2-dihydro-4-hydroxy-2-oxo-1-phenyl-1,8-naphthyridin-3-yl) pyrrolidinium, is a structurally novel compound that had been shown to inhibit leukotriene D4 formation in guinea pig lung in vitro. We tested whether SCH 37224 is able to inhibit both the formation of eicosanoids from human lung parenchyma in vitro and the binding of sulfidopeptide leukotrienes to membranes of lung parenchyma and bronchi. SCH 37224, at a concentration of 30 and 100 microM, was able to inhibit antigen-induced formation of sulfidopeptide leukotrienes, measured as leukotriene E4, while it did not significantly affect the formation of prostaglandin D2. At concentrations up to 100 microM, it did not affect either the binding of [3H]leukotriene C4 to membranes of human lung parenchyma or human bronchi, or the binding of [3H]leukotriene D4 to the parenchyma. In conclusion, SCH 37224 is a selective inhibitor of leukotriene formation in human lung in vitro, which might be of potential therapeutic interest in the treatment of asthma.

Eicosanoids↗
PubMed1991

Safety of high-dose vitamin A. Randomized trial on lung cancer chemoprevention.

The paper reports on the efficacy and side effects of high-dose vitamin A, administered as adjuvant treatment for resected stage I lung cancer in a randomized clinical trial. After a median follow-up of 28 months, 283 patients were evaluable: 138 allocated to treatment with retinol palmitate (300,000 IU daily for at least 12 months) and 145 to standard observation. The clinical results available to date do well justify a continuation of the study. Skin dryness and desquamation were the most frequent symptoms, affecting 60% of all treated patients. Other symptoms such as dyspepsia, headache, nosebleeds and mild hair loss occurred in less than 10% of patients, and were self-terminating. Only in 4 patients (3%) was the treatment interrupted because of symptoms potentially related to vitamin A administration. As for laboratory tests, gamma-GT levels were abnormally elevated in 69% of treated patients vs. 39% of controls at 24 months (mean 149 vs. 58 IU/l; p less than 0.05). Serum triglyceride concentrations over 150 mg/dl were seen in 74% of treated patients vs. 43% of controls at 12 months (mean 283 vs. 179 mg/dl; p less than 0.05). There were no other laboratory signs of toxicity attributable to vitamin A. In our experience, high-dose retinoyl palmitate administration was a well-tolerated and safe treatment. The long-term impact on lipid metabolism still remains to be determined.

Alkaline Phosphatase↗
PubMed1988

Surgical therapy in lung cancer with single brain metastasis.

From January 1975 to April 1987, 27 patients underwent surgical resection of non oat cell lung cancer and a single brain metastasis. There were 25 men and 2 women ranging in age from 37 to 70 years. In 21 cases the brain metastasis was synchronous while in 6 cases the onset was metachronous. In 17 cases, the site of the brain metastasis was supratentorial and in 10 cases it was located in the posterior fossa. The chest X-ray confirmed the primary lung tumour in 24 cases. In 3 cases, only bronchoscopy and cytology revealed the primary focus of the tumour. The lung cancer was located in the upper lobe in 25 patients. Upper lobectomy was performed in 23 patients, pneumonectomy in 3, and lower lobectomy in 1. There were no operative deaths. The cell type was adenocarcinoma in 19 cases, squamous cell carcinoma in 4 patients and large cell carcinoma in 4. Only the tumour and nodes were used for staging at thoracotomy. The classification was: 12 patients in stage I, 2 in stage II, and 13 in stage III. At conclusion of the study the longest survival was 68 months after thoracotomy. There was no significant difference in the duration of survival in patients over or under 50 years old. Better results were obtained in patients without node metastases at thoracotomy (median survival of 30 months and an overall 5-year survival of 35%), and in patients with supratentorial metastases (median survival of 22 months and an overall 5-year survival of 23.4%). Our experience confirms that combined surgery prolongs survival and improves the quality of life.

Adult↗
PubMed1988

Lung cancer chemoprevention with retinol palmitate. Preliminary data from a randomized trial on stage Ia non small-cell lung cancer.

On the basis of epidemiologic and experimental evidence of an anticancer activity of vitamin A, a randomized clinical trial was activated in Milan with the aim of evaluating if retinol palmitate administration (per os, 300,000 I.U. daily) after complete resection of stage Ia non small-cell lung cancer could reduce the occurrence of cancer relapses (within 3 years) and/or the occurrence of new primary tumors (beyond 3 years). By September 1987, 181 patients had entered the trial: 87 in the treatment arm and 94 in the control arm. After a median follow-up of 14 months, the interim analysis was focused on the evaluation of toxicity, compliance, and early recurrences. Although the large majority of patients were affected by skin and mucous membrane desquamation and dryness during treatment, these symptoms were generally mild and well tolerated, and never induced the patient to stop the treatment. Other side effects like headache, hair loss, itching, or dyspepsia were detected at a much lower frequency. Only in 3 patients the treatment was interrupted, because of signs or symptoms potentially related to vitamin A administration. At the time of the analysis, a total of 42 (23%) patients had relapsed; 16 (18%) in the treated arm, and 26 (28%) in the control arm. The largest difference between treated patients and controls was observed for bone metastases (2 vs. 7) and brain metastases (3 vs. 6), and for squamous histology (6 vs. 11). Only 2 cases of new primary cancer were detected, both in the control arm. These results are promising both in terms of tolerance and efficacy of treatment, but given the short median follow-up they must be very cautiously interpreted. A longer follow-up is necessary to establish whether a significant proportion of early recurrences could be prevented, or only delayed, by vitamin A administration.

Adolescent↗
PubMed1988

Synchronous brain metastasis from lung cancer. Result of surgical treatment in combined resection.

The results of combined surgical resection of brain metastasis and primary lung cancer from January 1976 to April 1986 were evaluated. In all cases the brain metastasis was single and synchronous and was resected first. There were 20 men and one woman, with an average age of 53 years. All patients initially had neurologic symptoms related to an intracranial mass. In 19 patients the primary lung cancer was roentgenologically visible, but in two the lesion was recognizable only by bronchoscopy. There were no operative deaths. Nine of 21 patients had a poor postoperative course and died during the first 6 months. The combined surgical approach improved the short-term survival rate in four patients, who died 11, 12, 18, and 21 months after the thoracic operation. In six patients (28.5%) survival for more than 2 years was obtained (three died after 27, 30, and 40 months, three are alive after 25, 28, and 48 months). Two others patients are alive and well 4 and 16 months after the thoracic operation. Synchronous onset of brain metastasis from lung cancer does not necessarily contraindicate combined operations, which can provide long-term survival in selected patients. The absence of mediastinal node metastasis is a favorable prognostic factor. Computed tomographic screening of the brain improves patient selection.

Adenocarcinoma↗
PubMed1987

Endoscopic gluing of bronchopleural fistula.

Three patients with postpneumonectomy bronchopleural fistula were treated with endoscopic gluing of the fistula. The technique and the results of this method are described.

Bronchial Fistula↗
PubMed1976

[Operative and long term results in 52 patients operated on for chronic postinfarction left ventricular aneurysm (author's transl)].

Operative and late post-operative results in 52 patients undergoing operation for chronic postinfarction left ventricular aneurysm are described. Aneurysm resection was performed in 33 patients. This procedure was combined with myocardial revascularization by means of insertion of a venous aorto-coronary by-pass graft in 14 cases. Hospital mortality for the total group was 3,8% (2 deaths). Surviving patients were followed-up 3 to 66 months. Two late deaths occurred. Clinical and functinal improvement occurred in the majority of surviving patients. The impact of simultaneous aorto-coronary by-pass grafting on operative results is discussed.

Adult↗
PubMed1975

[Multivalvular replacement: short and long term results in 367 cases (author's transl)].

Early and late results of 273 mitro-aortic, 66 mitro-tricuspid, 28 mitro-aortic-tricuspid valvular replacements performed between 1964-1973, were evaluated. The hospital mortality rate was 17, 5 percent for mitro-aortic, 30, 5 percent for mitro-tricuspid, 10, 7 percent for mitro-aortic-tricuspid replacement. The best results obtained in patients with mitro-aortic replacement, the worse one in patients with mitro-tricuspid replacement, that present also a poor functional rehabilitation. The actuarial curves were calculated: 9 years after operation the probability of survival was of 67 percent for patients operated of mitro-aortic valvular replacement and 47 percent for patients operated of mitro-tricuspid replacement.

Acute Kidney Injury↗