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PubMed1997

Cardio-histopathological observations on aborted equine fetuses infected with equid herpesvirus 1 (EHV-1).

Twenty-five aborted equine fetuses infected with equid herpesvirus 1 (EHV-1) were examined cardio-histopathologically. The main changes in the heart consisted of interstitial myocarditis and intramyocardial vascular lesions accompanied by degeneration and necrosis of the cardiac myocytes. Vascular pathology of intramyocardial small arteries and arterioles was characterized by endothelial cell necrosis and fibrinoid changes in the media. Eosinophilic intranuclear inclusion bodies characteristic of herpesvirus infection were detected in the myocardial cells and macrophages within and around the inflammatory lesions and in the endothelial cells and medial smooth muscle cells of the damaged vessels. This observation, taken in conjunction with the fact that EHV-1 antigens were detected immunohistochemically in some myocardial and endothelial cells, provides morphological evidence in support of the viral aetiology of the cardiac lesions.

Abortion, Veterinary↗

PubMed1995

TORCH syndrome.

The original TORCH complex described clinically similar congenital infections caused by Toxoplasma gondii, rubella virus, cytomegalovirus, and herpes simplex virus, types 1 and 2. Cutaneous manifestations, including petechiae, purpura, jaundice, and dermal erythropoiesis, are commonly seen in toxoplasmosis, rubella, and cytomegalovirus infections. In herpes simplex virus infections, 80% of symptomatic infants show single or grouped cutaneous vesicles, oral ulcers, or conjunctivitis. Extracutaneous signs and symptoms are variable and can be severe. Significant clinical signs in congenital toxoplasmosis include diffuse intracerebral calcification, chorioretinitis, and microcephaly; congenital rubella can result in deafness, congenital heart disease, retinopathy, and brain calcification. Cytomegalic inclusion disease can include hepatomegaly, splenomegaly, paraventricular calcification, and intrauterine growth retardation. Localized or disseminated congenital herpes virus infection often involves the central nervous system and the eye. Diagnosis is confirmed by culture and identification of species-specific immunoglobulin M within the first 2 weeks of life. Histological examination contributes to the diagnosis in herpes simplex virus infection. Treatment for toxoplasmosis includes pyrimethamine with sulfadiazine or trisulfapyrimidine; congenital herpes simplex virus infection is treated with acyclovir. No specific therapy for congenital rubella or cytomegalovirus infections has been established, and so treatment is primarily supportive.

Acyclovir↗

PubMed2005

Abelson-interactor-1 promotes WAVE2 membrane translocation and Abelson-mediated tyrosine phosphorylation required for WAVE2 activation.

WAVE2 is a member of the Wiskott-Aldrich syndrome protein family of cytoskeletal regulatory proteins shown to link Rac activation to actin remodeling via induction of Arp 2/3 activity. WAVE2 is thought to be regulated by its positioning in a macromolecular complex also containing the Abelson-(Abl) interactor-1 (Abi-1) adaptor, but the molecular basis and biologic relevance of WAVE2 inclusion in this complex are ill defined. Here we show that Abi-1 binding to WAVE2 is mediated by discrete motifs in the Abi-1 coiled-coil and WAVE2 WAVE-homology domains and increases markedly in conjunction with Abi-1-WAVE2 translocation and colocalization at the leading edge in B16F1 cells after fibronectin stimulation. Abi-1 also couples WAVE2 to Abl after cell stimulation, an interaction that triggers Abl membrane translocation with WAVE2, Abi-1, and activated Rac, as well as Abl-mediated tyrosine phosphorylation and WAVE2 activation. By contrast, mutation of tyrosine residue Y150, identified here as the major site of Abl-mediated WAVE2 tyrosine phosphorylation, as well as disruption of WAVE2-Abi-1 binding, impairs induction of WAVE2-driven actin polymerization and its membrane translocation in association with activated Rac. Similarly, WAVE2 tyrosine phosphorylation and induction of membrane actin rearrangement are abrogated in fibroblasts lacking the Abl family kinase. Together, these data reveal that Abi-1-mediated coupling of Abl to WAVE2 promotes Abl-evoked WAVE2 tyrosine phosphorylation required to link WAVE2 with activated Rac and with actin polymerization and remodeling at the cell periphery.

Actins↗

PubMed2006

Male circumcision and risk of syphilis, chancroid, and genital herpes: a systematic review and meta-analysis.

OBJECTIVES: Male circumcision is associated with reduced risk of HIV infection. This may be partly because of a protective effect of circumcision on other sexually transmitted infections (STI), especially those causing genital ulcers, but evidence for such protection is unclear. Our objective was to conduct a systematic review and meta-analyses of the associations between male circumcision and infection with herpes simplex virus type 2 (HSV-2), Treponema pallidum, or Haemophilus ducreyi. METHODS: Electronic databases (1950-2004) were searched using keywords and text terms for herpes simplex, syphilis, chancroid, ulcerative sexually transmitted diseases, or their causative agents, in conjunction with terms to identify epidemiological studies. References of key articles were hand searched, and data were extracted using standardised forms. Random effects models were used to summarise relative risk (RR) where appropriate. RESULTS: 26 articles met the inclusion criteria. Most syphilis studies reported a substantially reduced risk among circumcised men (summary RR = 0.67, 95% confidence interval (CI) 0.54 to 0.83), although there was significant between study heterogeneity (p = 0.01). The reduced risk of HSV-2 infection was of borderline statistical significance (summary RR = 0.88, 95% CI 0.77 to 1.01). Circumcised men were at lower risk of chancroid in six of seven studies (individual study RRs: 0.12 to 1.11). CONCLUSIONS: This first systematic review of male circumcision and ulcerative STI strongly indicates that circumcised men are at lower risk of chancroid and syphilis. There is less association with HSV-2. Potential male circumcision interventions to reduce HIV in high risk populations may provide additional benefit by protecting against other STI.

Chancroid↗

PubMed2000

Simultaneous chiral separation of triadimefon and triadimenol by sulfated beta-cyclodextrin-mediated capillary electrophoresis.

Enantiomeric separation of two triazole fungicides, triadimefon and triadimenol, was investigated in sulfated beta-cyclodextrin (sulfated beta-CD)-mediated capillary electrophoresis (CE) systems. It was found that, at pH 2-4, sulfated beta-CD exhibited strong chiral recognition towards both triadimefon and triadimenol. The enantiorecognition was believed to result from the multiple interactions between sulfated beta-CD and the analytes, which included inclusion effect, electrostatic interaction, and hydrogen bonding. Under optimal conditions (phosphate buffer with 2% sulfated beta-CD, pH 2.5), simultaneous resolution of all chiral isomers of triadimefon and triadimenol was achieved in less than half an hour. In conjunction with solvent extraction and subsequent enrichment by solid-phase extraction (SPE), this new enantioseparation method was applied successfully in the study of stereoselectivity associated with the biotransformation of triadimefon to triadimenol by soil microorganisms. The present methodology was superior to the commonly adopted chiral gas chromatography (GC) approach in that a very mild procedure was involved from sample extraction to the ultimate chiral separation. Thus, the disturbance of the enantiomeric distribution patterns of the original soil samples by heat stress was an unlikely scenario. Furthermore, it was discovered that, owing to the unique selectivity of the present separation strategy, there was virtually no interference from the soil matrix, which led to improvements in both sensitivity and selectivity in real sample determination.

Buffers↗

PubMed2001

[Experiences with a new transvenous electrode for left ventricular stimulation].

BACKGROUND: Left ventricular and biventricular pacing has recently been introduced as a new therapy for chronic heart failure in selected patients. We report our initial experience with a new electrode for transvenous left epicardial pacing via tributaries of the coronary sinus. PATIENTS AND METHOD: Inclusion criteria were: chronic heart failure NYHA > or = II, QRS-duration > 120 ms, left ventricular ejection fraction < 35%. Dual chamber pacemakers (CPI Contak TR) or defibrillators (CPI Contak CD) designed for atrial triggered biventricular stimulation were implanted in conjunction with the CPI Easytrak-lead for left ventricular pacing in a coronary vein. Lead placement was achieved via a subclavian vein access and a preformed guiding catheter for coronary sinus insertion. RESULTS: In 13 of 16 patients (81%) the left ventricular lead was implanted successfully in a mid to distal posterior or anterolateral vein. Lead insertion could not be achieved in 2 patients with significant cardiomegaly and right atrial enlargement (12.5%), while 1 patient with a history of myocardial infarction and small anterior ventricular aneurysm had inacceptable high left ventricular pacing thresholds intraoperatively. The implantation was well tolerated by all patients without complications. There was no case of lead dysfunction (mean follow-up time: 142 +/- 126 days). Intraoperative electrode measurements and chronic parameters (> or = 3 months, n = 8) are given in Table 1. CONCLUSION: In the past left ventricular pacing has mainly been achieved by epicardially placed electrodes after thoracotomy with conventional electrodes. This new approach for chronic left ventricular pacing uses the familiar transvenous over-the-wire technique in combination with a newly developed guiding catheter and electrode for pacing in left epicardial veins. Lead placement was shown to be safe and success rate was higher than in previous reports with standard electrodes. We conclude that left epicardial lead placement with the over-the-wire technique and a preformed guiding catheter for coronary sinus access presents as a safe and maybe more efficient method for left ventricular pacing.

Cardiac Pacing, Artificial↗

PubMedDate not supplied

Anterior uveitis associated with Kawasaki syndrome.

Forty-one children with a clinical diagnosis of Kawasaki syndrome had a pediatric ophthalmologic examination performed at a mean time of 8.6 days after onset of fever. Twenty-seven of 41 patients (66%) had evidence of anterior uveitis by slit lamp examination. Bilateral involvement was noted in 25 of 27 patients (97%). Punctate keratitis was evident in 5 of 41 patients (12%). Three of these five had coexisting uveitis. The incidence of anterior uveitis in patients examined during the first week of their illness was 83% (20 of 24 patients), compared to an incidence of 41% (7 of 17) in patients first examined greater than 1 week after onset of disease (P = 0.004). There was no difference in the uveitis, vs. the non-uveitis groups with respect to age, sex, race or subsequent aneurysm formation as a complication of their Kawasaki syndrome. The mean erythrocyte sedimentation rate was not different in the two groups. Anterior uveitis is a common finding early in the course of Kawasaki syndrome. Slit lamp examination may be a helpful clinical tool in identifying patients with Kawasaki syndrome, and uveitis should be considered for inclusion in the Centers for Disease Control case definition of Kawasaki syndrome.

Child↗

PubMed1988

[Histologic diagnosis and ultrastructural cytology of epithelioid sarcoma].

Epithelioid sarcoma is a rare but distinctive soft tissue tumor showing characteristic histologic features associated with a typical course, but there is still some debate as to its histogenesis. Two cases of this unique tumor were analyzed using the electron microscope. Light microscopically the diagnostically relevant cell type is oval to polyhedral exhibiting a dense eosinophilic cytoplasm. In such epithelioid cells the cytoplasm may sometimes be completely filled with an inclusion-body like hyaline eosinophilic material. Ultrastructurally the most striking feature are abundant intermediate-type filaments in these eosinophilic cells. While none of the electron microscopic findings is specific, the accumulation of the intermediate-type filaments in conjunction with the other cellular features described in sufficiently consistent and distinctive and can thus be used for confirming the diagnosis. In formalin-fixed specimens the electron microscopical investigation may be helpful in everyday diagnosis. The suggestion from the literature that epithelioid sarcoma is related to the synovial sarcoma can not be supported by our ultrastructural findings.

Adult↗

PubMed1985

Ultrastructural localization of the herpes simplex virus major DNA-binding protein in the nucleus of infected cells.

Using immunocytochemical procedures in conjunction with electron microscopy we have examined the distribution of the major DNA-binding protein (DBP) of herpes simplex virus (HSV) in infected nuclei. In embedded specimens, DBP was preferentially associated with fibrillar material of electron-translucent viral inclusions, and to a lesser extent with peripheral (marginated) host chromatin. The latter association was sensitive to a non-ionic detergent ('Photo flo'). In chromatin spread by the Miller technique, DBP was found to be a component of the 10 nm 'thick filaments' previously described in HSV infection.

Cell Nucleus↗

PubMed2005

The AD8: a brief informant interview to detect dementia.

BACKGROUND: Brief measures that accurately discriminate normal cognitive aging from very mild dementia are lacking. Cognitive tests often are insensitive to very mild dementia. Informant-based measures may be more sensitive in detecting early dementia. OBJECTIVE: To identify informant-reported clinical variables that differentiate cognitively normal individuals from those with very mild dementia. METHODS: A 55-item battery of informant queries regarding an individual's cognitive status was derived from a semistructured interview and a consensus panel of dementia experts. The battery was evaluated with informants for 189 consecutive participants of a longitudinal study of memory and aging and compared with an independently obtained Clinical Dementia Rating (CDR) score for the participant. Multiple regression and receiver operator characteristic curves assessed subsets of the items to discriminate between CDR 0 (no dementia) and CDR 0.5 (very mild dementia). RESULTS: The final version (AD8) querying memory, orientation, judgment, and function was administered to an additional sample of 112 CDR 0 and 68 CDR 0.5 participants. Using a cut-off of two items endorsed, the area under the curve was 0.834, suggesting good to excellent discrimination, sensitivity was 74%, and specificity was 86% (prevalence of 0.38 for very mild dementia). Inclusion of 56 additional individuals with mild to severe dementia (increasing dementia prevalence to 0.53) increased sensitivity to 85%. CONCLUSIONS: The AD8 is a brief, sensitive measure that reliably differentiates between nondemented and demented individuals. Use of the AD8 in conjunction with a brief assessment of the participant could improve diagnostic accuracy in general practice.

Aged↗

PubMed1997

Giant cell granulomatous pulmonary and myocardial lesions in necrobiotic xanthogranuloma with paraproteinemia.

OBJECTIVE: To report three cases of pulmonary or myocardial disease (or both) and necrobiotic xanthogranuloma. MATERIAL AND METHODS: Giant cell granulomas of the lung and myocardium were demonstrated in three patients who had pulmonary and myocardial lesions of necrobiotic xanthogranuloma in conjunction with skin lesions, leukopenia, paraproteinemia, and complement deficiencies. The patients were two men who were 47 and 64 years of age and a 39-year-old woman. RESULTS: Biopsies of skin and visceral lesions showed asteroid and cytoplasmic inclusions. B-cell lymphoid nodules were found. In one of the male patients, a major clonal T-cell receptor gene rearrangement was detected in the peripheral blood. Prednisone was ineffective in two of the patients. The other patient experienced regression of skin lesions and diminishment of a chest nodule after receiving alkylating agent therapy. CONCLUSION: Establishing the correct diagnosis is important, and apparently it is possible to establish the nature of the myocardial and pulmonary lesions with use of appropriate scans and by biopsy. Successful treatment of necrobiotic xanthogranuloma skin lesions with corticosteroids or alkylating agents (or both) implies that evolution of serious disease that compromises the heart and lungs could be controlled.

Adult↗

PubMed2000

The feeding of leaf meal of Calliandra calothyrsus to laying hens.

A 67-day feeding experiment was conducted to study the effects of inclusion of 5%, 7.5% or 10% leaf meal of Calliandra calothyrsus (calliandra) in the diets of laying hens on feed intake, egg production, egg weights, yolk colour and the birds' weights. While no significant effects were seen on either egg numbers or egg size, feed intake increased and the efficiency of feed utilization decreased with increasing inclusion of the foliage. Absolute initial and final body weights did not show significant treatment differences but live weight changes over the course of the experiments were statistically significant, weight gains decreasing with increasing calliandra levels. The strength of colour of the yolks increased within 3 days of offering the calliandra, irrespective of the level of inclusion. The persistence of the colour change after withdrawal of the leaf meal ranged from 3 days at the 5% inclusion to over 10 days at the 10% level. While it may be possible to include calliandra leaf meal in poultry rations along with other, local, low-cost components, there would appear to be little advantage in using it in conjunction with commercial layers meal at levels higher than those necessary to provide the desired pigmentation level in the yolks (5% or less).

Animal Nutritional Physiological Phenomena↗

PubMed2005

Combining the CO2 laser and the endoscope to remove soft tissue masses from the forehead area.

OBJECTIVE: The aim of this study was to provide a retrospective analysis of treatment that combines the laser and the endoscope. BACKGROUND DATA: Previously, surgeons faced many complications arising from endoscope-assisted surgery in the region of the forehead. In order to reduce the incidence of complications, such as swelling and hematoma, the CO2 laser is added to endoscope-assisted surgery. METHODS: Between January 1996 and January 2003, 42 patients were treated for the removal of a benign tumor. The group was comprised of 18 males and 24 females, and their ages ranged from 5 to 64 years. The SurgiLase 150XJ CO2 laser system, used in conjunction with the flexible FIBERLASE (Sharplan, NJ), was used in all cases. The endoscope was 4 mm in diameter, with an angle of 30 degrees (Snoden Pancer, USA). The dissection was performed by relaying images from the endoscope to a monitor. The basic instrumentation consists of elevators, a nerve hook, retractors, and endoscopic scissors. Suction of the smoke generated by laser evaporization was also necessary. RESULTS: Of the 42 cases treated, 30 patients displayed lipomas, 10 patients displayed inclusion cysts, and two patients displayed dermoid cysts. After surgery, the follow-up period ranged from 6 months, to 2 years and 6 months, with an average of 1 year and 7 months. In this retrospective review, the incidences of early complications of these 42 patients included one case of scalp alopecia, three of scar alopecia, one of numbness, and three of ecchymosis. No hematoma cases were recorded. Evaluation after 6 months revealed the later complication of one scar alopecia. CONCLUSIONS: SurgiLase CO2 laser, used in conjunction with endoscopic surgery, enables plastic surgeons to work at a distance through small incisions without causing bleeding. Visible scars are reduced and recovery time is diminished.

Adolescent↗

PubMed1995

Neuroendocrine carcinoma of the thymus: aspiration biopsy, immunocytochemistry, and clinicopathologic correlates.

We report three cases of well-differentiated neuroendocrine carcinoma originating primarily in the anterior mediastinum which had been initially investigated by fine-needle aspiration cytology in conjunction with immunocytochemistry and subsequently recognized as thymic in origin. Aspirates consisted of loosely cohesive or aggregated medium sized elements with round to oval nuclei and scanty cytoplasm. In all cases the Romanowsky stain provided an excellent delineation of definite paranuclear inclusion-like structures having a semicircular or discoid appearance which appeared to contain cytokeratin by immunocytochemical studies and were very similar to the intermediate filament paranuclear "buttons" found in neuroendocrine Merkel cell carcinoma of the skin. This appears to be a novel cytologic observation for thymic neuroendocrine carcinoma. We discuss the significance of the above cytologic and immunocytochemical findings and their possible role in the diagnosis of thymic neuroendocrine carcinoma by fine-needle aspiration biopsy.

Aged↗

PubMed2002

Spontaneous human herpes virus type 1 infection in a chinchilla (Chinchilla lanigera f. dom.).

A 1-year-old male chinchilla with a 2-week history of conjunctivitis suffered subsequently from neurological signs comprising seizures, disorientation, recumbency and apathy. After 3 weeks of progressive central nervous disease the animal was killed in view of the poor prognosis. A non-suppurative meningitis and polioencephalitis with neuronal necrosis and intranuclear inclusion bodies were observed at necropsy and by light microscopy. The brain stem and cerebral cortices were most severely affected. Both eyes displayed ulcerative keratitis, uveitis, retinitis and retinal degeneration, and optical neuritis. Additionally, a purulent rhinitis with focal erosions, epithelial degeneration and intranuclear inclusion bodies was present. Ultrastructurally, herpes virus particles were detected in neurons of the brain. Immunohistochemistry with antisera specific for human herpes virus types 1 and 2 resulted in viral antigen labeling in neurons, glial cells and in neuronal processes. Viral antigen was found in the rhinencephalon, cerebral cortices, hippocampus, numerous nuclei of the brain stem, single foci in the cerebellum, and in a solitary erosive lesion of the right nasal vestibulum. Viral antigen was not detected in the eyes. The virus was isolated from the CNS, and nucleic acid sequence analysis of the glycoprotein B and the DNA polymerase revealed a sequence homology with human herpes virus type 1 of 99% and 100%, respectively. The clinical signs, the distribution of the lesions and the viral antigen suggest a primary ocular infection with subsequent spread to the CNS. Chinchillas are susceptible to human herpes virus 1 and may play a role as a temporary reservoir for human infections.

Animals↗

PubMed2006

Congenital myopathy with abundant nemaline rods in a cat.

Nemaline myopathy is associated with rod-shaped structures in muscle fibers. At least seven distinct clinical forms have been described in humans and mutations have been identified in five different thin-filament genes. Only a few cases of spontaneously occurring nemaline myopathy have been reported in animals and include an adult-onset form in a family of cats and an early-onset form in a dog. Here, we describe a 2-year-old male, neutered, domestic shorthaired cat that was referred to the Veterinary Medical Teaching Hospital, University of California-Davis, for evaluation of chronic, progressive weakness, and fine tremors. Neurologic deficits were restricted to the neuromuscular system. Electromyography showed mild to moderate diffuse spontaneous activity. Although rod bodies were prominent on light and electron microscopic evaluation of biopsies from several muscles, sarcoplasmic accumulations of dystrophin, desmin, and spectrin also were identified by immunohistochemistry. These findings may represent the occurrence of rod bodies in conjunction with a protein-aggregate myopathy.

Animals↗

PubMed2002

Aware and unaware perception in hemispatial neglect: evidence from a stem completion priming task.

The current study used the process dissociation procedure in conjunction with a stem-completion priming task to disentangle the influences of aware and unaware perception in patients with hemispatial neglect. One lateralized picture prime was presented simultaneously with a filler picture followed by a centrally presented word stem. In the inclusion condition participants were asked to complete the word stem with the previously presented picture name; in the exclusion task they were asked to complete the stem with the name of a picture other than the one previously presented. Findings indicated that neglect patients had reduced unaware perception of pictures presented in the left visual field and an absence of awareness for those same pictures. In addition, patients had reduced awareness for right visual field pictures, but unaware perception remained intact. These findings suggest that observations of preserved information processing in neglect are due to residual unaware perception and not due to residual awareness of information in the neglected hemispace.

Aged↗

PubMed2000

The calcium channel blocker used with cyclosporin has an effect on gingival overgrowth.

BACKGROUND/AIMS: To investigate whether the choice of calcium channel blocker, used in conjunction with cyclosporin A, affected the prevalence of gingival overgrowth. METHOD: A cohort of 135 renal transplant recipients who had been medicated with cyclosporin A in combination with either nifedipine (89) or amlodipine (46) since transplant, took part in the study. The inclusion criteria were that eligible subjects had been in receipt of a kidney transplant for at least 12 months, had at least 10 teeth and had not received specialist periodontal treatment. The age, gender, current drug regimen and dosage were recorded for each participant and alginate impressions taken of both arches. The presence and severity of gingival overgrowth were scored from plaster models. RESULTS: A higher proportion (72%) of the amlodipine group were categorised as having gingival overgrowth compared with only 53% of the nifedipine group, chi square=4.5, p<0.05. Logistic regression analysis was used to explore the relationship between the presence or absence of gingival overgrowth (dependent variable) and age, gender, time since transplant, dose of cyclosporin A, centre in which the patient was treated, and the calcium channel blocker used (independent variables). Independent predictors of gingival overgrowth in this multivariate analysis were whether the individual was treated with amlodipine or nifedipine (p=0.01) and whether the individual was young or old (p=0.01). Within the multivariate analysis, the odds ratio for amlodipine to be associated with gingival overgrowth compared with nifedipine was 3.0 (confidence interval 1.3-6.9). CONCLUSIONS: The prevalence of gingival overgrowth in renal transplant recipients maintained on cyclosporin A and nifedipine is lower than those treated with cyclosporin A and amlodipine.

Adult↗