Acute ischemic syndromes.
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Acute Disease↗
Biomedical subjects
V C de Lima
Publications and source records attributed to V C de Lima.
Expression of tumour necrosis factor alpha and accumulation of fibronectin in coronary artery restenotic lesions retrieved by atherectomy.
BACKGROUND: The formation of coronary artery neointima experimentally induced in piglets after cardiac transplantation is related to an immune-inflammatory reaction associated with increased expression of T cells and inflammatory mediators (tumour necrosis factor alpha and interleukin 1 beta) and upregulation of fibronectin. In vivo blockade of tumour necrosis factor alpha in rabbits after cardiac transplantation results in reduced neointimal formation. The objective of this study was to investigate the hypothesis that coronary restenosis after atherectomy or percutaneous balloon angioplasty is associated with a similar inflammatory cascade initiated by mechanical injury. METHODS: Specimens taken at coronary atherectomy were analysed from 16 patients. Nine had had the procedure performed twice, firstly, to remove a primary lesion, and secondly, to remove a restenotic lesion. Seven had percutaneous balloon angioplasty after removal of restenotic tissue. Coronary atherectomy specimens were analysed by immunohistochemistry for the presence of T cells, macrophages, major histocompatibility complex II, interleukin 1 beta, tumour necrosis factor alpha, fibronectin, and the receptor for hyaluronan mediated motility. RESULTS: The groups were clinically and angiographically similar with equivalent lumens before and after atherectomy. Restenotic lesions had increased expression of tumour necrosis factor alpha and fibronectin compared with the primary lesions (P < 0.05 for both). There was also a trend towards a greater number of T cells and increased expression of interleukin 1 beta. CONCLUSIONS: Restenosis is associated with increased expression of tumour necrosis factor alpha and fibronectin, suggesting that an immune-inflammatory reaction probably contributes to neointimal formation and may represent a form of wound healing and repair secondary to mechanical injury.
Angioplasty, Balloon, Coronary↗
Schistosomiasis: predisposing cause for the formation of hepatic abscesses? Case report.
An adult patient with chronic schistosomiasis from an endemic area, complained about a seven day fever, along with jaundice and lumbar backache on the right side. Image exams showed multiple pyogenic liver abscesses. All the classic etiologies were discarded through clinical, radiological and laboratorial criteria. Schistosomiasis can cause pylephlebitis as a complication, along with immunesuppression, granulomatous reaction with central lobular liver necrosis and a greater risk of infection. The authors suggest that schistosomiasis in its chronic form may be the predisposing cause of multiple pyogenic liver abscesses, especially in endemic areas.
Chronic Disease↗
Hantavirus pulmonary syndrome. Report of the first three cases in São Paulo, Brazil.
The hantavirus pulmonary syndrome was first recognized in cases that occurred in the U.S. in 1993, which served as an alert not only for American physicians but also for physicians in other countries for the identification of the disease. In the city of São Paulo, Brazil, 3 cases of the syndrome were recorded in 1993. The patients were young brothers residing in the Mata Atlântica (Atlantic Forest) region submitted to recent deforestation. Two of the patients died of acute respiratory insufficiency and the third recovered without sequelae. In the surviving patient the diagnosis was established by a laboratory criterion based on the detection of specific IgM and IgG class antibodies by indirect immunofluorescence. In the two patients who died, the diagnosis was confirmed by laboratory tests using immunoperoxidase technique for hantavirus in tissue, in histological lung and heart sections in one case, and by clinical and epidemiological data in the other.
Adolescent↗
[Spotted fever in the municipality of Pedreira, PS, Brazil. Serologic survey].
Cases of Brasilian spotted fever (BSF) have been occurred since 1985, in the rural area of Pedreira town, situated 160 km away from the city of São Paulo (longitude 46 degrees 54'07", latitude 22 degrees 44'21"). Aiming at evaluating the prevalence of Brasilian spotted fever in this endemic area, single-serum samples were collected from 473 healthy persons, amongst city-dwellers and the local china industry workers. The obtained samples were tested by indirect immunofluorescence (IFA), in order to determine the antibodies titer for the group of Brasilian spotted fever. Twenty-five (5.3%) were considered positive (titer 3 1:64) and thirty-one (6.5%) were taken as "borderline" (titer 1:32). The results show a serologically positivity rate similar to other areas, known as endemic ones within the country.
Adolescent↗