Biomedical subjects

B J Hu

Publications and source records attributed to B J Hu.

12 recordsLinked to original sources

PubMed2001

[Detection of coxsackie virus B3 gene in myocardium and spleen samples in myocarditis with sudden death].

OBJECTIVE: To detect the Coxsackie virus B3(CVB3) gene in myocardium and spleen tissues in viral myocarditis(VMC) with sudden death and to explore the diagnostic method for VMC by means of seeking pathogene. METHODS: By in situ RT-PCR, the detection of CVB3 gene in myocardium and spleen sections were performed in sudden death group caused by VMC and non-cardiac death group. RESULTS: In VMC group, CVB3 gene-positive signals were seen in myocardium sections(3 out of total 8 cases, No. 1, 4, 7 cases) and spleen sections(4 out of total 8 cases, No. 2, 4, 6, 7 cases). In non-cardiac death group, no positive signals were detected in both myocardium and spleen tissues. CONCLUSION: Positive detection of CVB3 gene in both myocardium and spleen maybe an important character of VMC and can improve the detecting pathogene in diagnosing VMC.

Death, Sudden↗

PubMed2001

[Histopathological observation of experimental slight viral myocarditis].

To study the diagnostic method of slight viral myocarditis in the field of forensic pathology, slight viral myocarditis model was induced in Balb/c murine by coxsackie virus B3. Organs of hearts, livers, spleens, lungs and kidneys were examined through routine pathological methods. Pathological changes at different levels of these organs were observed. The results indicated that viral myocarditis was a kind of disease with multiple organ alterations and that the pathological observation and comprehensive analysis of multiple organs was one of the useful methods for diagnosing slight viral myocarditis.

Animals↗

PubMed2001

[Study on the specificity of complement C5 for the postmortem diagnosis of myocardial infarction].

In order to explore the specificity of complement C5 in the postmortem diagnosis of myocardial infarction, changes of C5 staining in normal, infarcted and other non-infarcted myocardia with direct or indirect myocardial injuries (myocarditis, mechanical asphyxia, electrocution, hemorrhagic shock, cardiac contusion and organophosphate poisoning) were studied with immunohistochemistry and image analysis. The results showed that positive C5 staining could be observed in groups of myocardial infarction and myocarditis, but not in groups of mechanical asphyxia, electrocution, hemorrhagic shock, cardiac contusion, and organophosphate poisoning. It is indicated that positive reaction of C5 could only be affected by myocarditis, which means that it was more specific for the diagnosis of myocardial infarction.

Adolescent↗

PubMed2000

[Immune response in Pneumocystis carinii pneumonia in rats].

OBJECTIVE: To study the inflammatory immune response to Pneumocystis canii pneumonia(PCP) in rats induced by glucocorticoid(GC). METHODS: The model of PCP was set up by injecting GC subcutanously to SD rats. Lymphocyte proportion in peripheral blood, CD4+/CD8+ T cell ratio of PBL and lymphocyte proportion in the BALF were measured. The levels of sIL-2R and TNF-alpha in the BALF were detected. RESULTS: 1. After the rats were immunospressed, the lymphocyte proportion in the peripheral blood and CD4+/CD8+ ratio of PBL, and the lymphocyte proportion in the BALF were decreased, and the levels of sIL-2R, TNF-alpha in BALF were reduced. 2. The lowest levels of TNF-alpha in BALF and CD4+/CD8+ T cells of PBL were observed in PCP group; 3. The lymphocyte proportion in the BALF was significantly higher in PCP group than in PC negative group. CONCLUSION: The reduction in the level of TNF-alpha and CD4+/CD8+ T cell ratio in rats treated with GC might result in PCP infection under immunosuppressive condition.

Animals↗

PubMed1999

[A preliminary immunohistochemical study of fibronectin in viral myocarditis].

For postmortem diagnosis of viral myocarditis, 12 specimens of heart in autopsy were studied immunohistochemically with anti-fibronectin(FN) antibody. Among 5 cases with definite or suspected myocarditis, intensive FN-positive could be found in all monocytes, macrophages and some neutrophils and there were 3 cases with FN-positive cardiomyocytes. While in 3 violent death cases with leucocytes infiltration in the interstitial tissue of myocardia, no FN-positive cardiomocytes were observed, which was the same as that of 4 case without cardiac pathological changes. Moreover, there were rarely FN-positive leucocytes in the 7 cases without viral myocarditis. The results suggest that the immunohistochemical observation of FN in myocardia might be of value for detecting slight degeneration of cardiomyocytes and determining the inflammatory leucocyte infiltration in myocarditis.

Adolescent↗

PubMed1999

[Immunohistochemical observation of actin in viral myocarditis].

10 specimens of heart in autopsy were immunohistochemically studied by using anti-actin(At) antibody. In 5 cases with definite or suspected viral myocarditis according to Dallas criteria, actin in myocardium showed focal or diffuse weak staining, and occasionally showed focal absence of staining. In 2 cases with myocardial infarction, actin showed large pieces absent of staining, while actin in 3 cases with non-cardiac death showed strongly positive, well-distributed staining. The results indicated the immunohistochemical observation of actin in myocardium is useful for improving the sensitivity in diagnosing viral myocarditis and differentiating the slight injuries of myocytes caused by ischemia or inflammation.

Actins↗

PubMed1999

[Evaluation of anti-muscle actin monoclonal antibody HHF35 in the diagnosis of early myocardial infarction].

In order to explore the specificity of anti-muscle actin monoclonal antibody HHF35 in the postmortem diagnosis of early myocardial infarction, the changes of HHF35 staining in the infarcted myocardia and other non-infarcted myocardia with direct or indirect myocardial injury were studied with immunohistochemical S-P method. The results showed that the loss of HHF35 staining of different degrees was found in the infarcted myocardia, but also in the other non-infarcted myocardia with direct or indirect myocardial injury, such as cardiac contusion, myocarditis, hemorrhagic shock, electrocution, mechanical asphyxia. So it should be cautious in diagnosing early myocardial infarction with HHF35 immunohistochemistry.

Actins↗

PubMed1997

Sudden death caused by stricture of the sinus node artery.

The sudden unexpected deaths of two young people and the findings in their hearts at autopsy are described. The striking feature was marked narrowing of the sinus node arteries by fibromuscular dysplasia. There were no other histological abnormalities present elsewhere. The observations suggest that pathological changes of the sinus node arteries might lead to a terminal cardiac arrhythmia acting as the mechanism of death.

Adult↗

PubMed1996

Immunohistochemical study of fibronectin for postmortem diagnosis of early myocardial infarction.

The postmortem diagnosis of early myocardial infarction has been a puzzling problem in forensic practice. In the present study, an immunohistochemical study of fibronectin (FN) was performed for the first time on 34 autopsy hearts to determine early myocardial infarction with streptavidin/biotin/peroxidase technique. Five cases of definite myocardial infarction showed positive FN staining of cardiomyocytes; of 18 cases where early myocardial infarction was suspected, positive FN staining of cardiomyocytes was found in 15 cases, but no such staining was seen in 11 non-cardiac death controls. The results led to the conclusion that positive FN staining in cardiomyocytes is a reliable marker of acute myocardial infarction and could be used as a new, sensitive method for the postmortem diagnosis of early myocardial infarction. It is worth noting that all cases in this study were autopsied between 8 h and 4 days after death and 5 cases had been fixed in 10% formalin for over 10 years. FN immunohistochemistry still gave satisfactory results in those cases. It seemed that FN was not affected by postmortem autolysis and formalin-fixation and could be used in routine forensic practice, especially for retrospective analysis of cases.

Adult↗

PubMed1995

Diagnostic value of ions as markers for differentiating antemortem from postmortem wounds.

In the present study, the diagnostic value of ions as markers for differentiating antemortem from postmortem wounds was investigated. To accomplish this, skin and muscle samples were taken from antemortem and postmortem wounded cadavers and the contents of ions (Fe, Zn, Mg, Cu, K and Na) were determined with atomic absorption spectrophotometry. Our results show that the concentrations of Fe in antemortem wounded skin and muscle were significantly higher as compared with the control skin and muscle and the K/Na ratio in antemortem wounded muscle was reduced significantly compared to control muscle. However, the concentrations of Zn, Mg, Cu in antemortem wounded skin and muscle, and the K/Na ratio in antemortem wounded skin, were not significantly different from their controls. The concentrations of all these ions in postmortem wounded skin and muscles were not significantly different from their controls. It is indicated that the concentrations of Fc in skin and muscle and K/Na ratio in muscle are useful markers for differentiating antemortem from postmortem wounds. However, their routine use in forensic practice needs further investigation, since there are some overlaps of the ionic concentrations between normal and wounded skin and muscle.

Adolescent↗

PubMed1993

[Uncomplicated bronchial tuberculosis].

Thirty four cases of uncomplicated bronchial tuberculosis proved by fiberobronchoscopy (FB) and operation in recent ten years were reported. The total diagnostic yield of FB was 85.6%. The preliminary results revealed some new characteristics of uncomplicated bronchial tuberculosis during antituberculosis chemotherapy era: uncomplicated bronchial tuberculosis accounted for great proportion among bronchial tuberculosis; the involvement of middle and lower bronchi was more common; positive rate of sputum smear for AFB was low. Among the fibrobron choscopic manifestations, the percentage of proliferative lesions in bronchi was high.

Adult↗

PubMed1989

[Value of anti-contamination specimen brush in the etiologic diagnosis of bacterial pulmonary infections].

This paper reports the results of sampling the secretion of lower respiratory tract by protected specimen brush(PSB) via fiberoptic bronchoscope for the isolation of pathogenic organisms in laboratory and clinic. Studies in vitro showed that the technique of PSB is better than that of single shear catheter brush (SSC) or cytologic brush (CB) for anti-contamination. The specificity and sensitivity of sampling were 93% and 100% respectively. The application of PSB in the diagnosis of pneumonia in canine models revealed that both specificity and sensitivity were 100% Sampling in 18 cases of pulmonary bacterial infections and 17 cases of other pulmonary diffusing diseases indicated that the specificity and sensitivity were 86% and 94% respectively. The authors are of the opinion that PSB sampling technique has a better anti-contamination effect and can increase the isolation rate of pathogens. The PSB may be a satisfactory sampling tool in etiologic diagnosis of pulmonary infections.

Animals↗