: We compared the in vivo effect of red vs. white wine consumption on platelet aggregation, responsiveness and membrane viscosity, plasma total antioxidant status, thromboxane B2 levels, and ...fibrinolysis. Diet and red wine had a synergistic effect in decreasing platelet aggregation. Red wine did not have a significantly more favorable effect on the fibrinolytic factors than white wine. The reduction in platelet membrane viscosity after red wine, which could contribute to the protective antithrombotic role of red wine, needs further explanation.
The long-term neurologic sequelae of childhood tuberculous meningitis (TBM) mainly result from ischemia owing to cerebral vasculitis. Deep vein thrombosis occurs in adults with pulmonary tuberculosis ...owing to hypercoaguability. The present study aimed to investigate coagulation status during acute childhood TBM.
Coagulation status, including the natural anticoagulants, antithrombin, protein C and protein S; procoagulant FVIII; fibrinolytic factors, tissue plasminogen activator and plasminogen activator inhibitor-1 (PAI-1) as well as anticardiolipin antibodies (ACA), was determined in 16 children with TBM before and during treatment.
A prothrombotic profile was found as expressed by a decrease of anticoagulant (protein S) and increase of the procoagulant (factor VIII) activity. Raised PAI-1 and normal tissue plasminogen activator values indicated deficient fibrinolysis. This hypercoagulable state was more pronounced in stage 3 patients than in stage 2 patients. The bleeding time on admission ranged from 1.2 to 10 minutes mean 4.2 minutes. The mean platelet count on admission was 577.9 +/- 188.6 x 10/L and increased further during the course of the treatment.
The hypercoagulable state in childhood TBM is comparable to that described in adults with pulmonary tuberculosis and may further increase the risk for infarction. Therapeutic measures that reduce the risk for thrombosis could therefore be potentially beneficial in childhood TBM.
Red wines good, white wines bad? van Velden, David P.; Mansvelt, Erna P.G.; Troup, Gordon J.
Redox report : communications in free radical research,
01/2002, Letnik:
7, Številka:
5
Journal Article
Recenzirano
A review of the literature on the 'antioxidant' action of white wines on the cardiovascular system is given. The conclusion is that ingestion only of white wines very low, or lacking, in ...polyphenolics leads to a reduction in the antioxidant action of blood serum, and to an increase in the low density lipoprotein to high density lipoprotein ratio.
The effect of iron fortification of soup in a school feeding scheme (20 mg iron and 100 mg vitamin C per portion) and anthelmintic therapy on haematological and iron status and on growth was studied ...in 179 schoolchildren age six to eight years. Measurements were performed before and at the end of a six-month intervention and repeated five months later. In children with low baseline iron stores (serum ferritin <20 μg/L), iron fortification was associated with increases in haemoglobin (p <.05), mean corpuscular volume (p <.01), and serum ferritin (p<.0001), compared with children who received unfortified soup. Significant positive effects of the anthelmintic therapy on haemoglobin concentrations (p < .05) and height-for-age Z scores (p<.01) were found. Children with adequate baseline iron stores showed smaller but similar changes.
Abstract Fine needle aspiration biopsy (FNAB) is emerging as a technique of potential value in the diagnosis of benign and malignant lesions in areas such as the breast and thyroid gland. Its place ...in distinguishing reactive from neoplastic lymphoid proliferations, when compared to the established practice of excision biopsy and histopathology, continues to undergo evaluation. Morphology alone discriminates poorly between atypical or lymphoproliferative disorders as seen in the presence of Epstein-Barr or human immunodeficiency virus. Furthermore the polymorphic populations of follicular lymphoma may mimic reactive changes. In addition previous classifications of these tumours using working formulation or Kiel classification relied heavily on architecture, which is a feature not reflected in cytology smears. The World Health Organisation approach includes clinical features, immunophenotyping and cytogenetic profiles to define neoplasms of immunohaematopoietic tissues. Flow cytometry on fine needle aspiration biopsy offers additional advantages in being rapid and objective in quantitatively as well as qualitatively documenting cell surface characteristics. All patients referred for this procedure to Tygerberg Academic Hospital with suspected nodal or extranodal lymphoma between January 2002 and December 2004 were analysed. In each case flow cytometry and cytomorphology were correlated with histopathology on tissue biopsy, bone marrow examination and clinical follow-up for confirmation of diagnosis. Results of the 124 cases were tabulated and statistically processed. Eighty-one met the inclusion criteria, thirteen (16.1%) were not malignant, two (2.5%) were falsely negative, two (2.5%) were equivocal needing histology and in the remaining sixty-four (79%) diagnosis was achieved. Summary Fine needle aspiration coupled with flow cytometry can reliably distinguish between nodal and extranodal neoplastic B-cell population. It is concluded that appropriate use, in a collaborative multidisciplinary setting, may eliminate the need for surgical procedures in many cases. Conclusion These advances are not widely recognised and this is particularly true in South Africa. Accordingly, such an approach has been prospectively evaluated in the Western Cape showing that the combination of ready availability and diagnostic accuracy, after an initial learning curve, allow accurate characterisation of haematologic malignancies so that excision biopsy may be reserved for specific further studies to provide data not available from this less invasive procedure.
Malawi pilot study of Burkitt lymphoma treatment Hesseling, Peter B.; Broadhead, Robin; Molyneux, Elizabeth ...
Medical and pediatric oncology,
December 2003, Letnik:
41, Številka:
6
Journal Article
Hairy cell leukaemia, previously known as leukaemic reticuloendotheliosis, is an indolent lymphoproliferative disorder of unknown etiology. It typically affects males, causes marked splenomegaly and ...moderate enlargement of the liver, whilst lymphadenopathy is inconspicuous. Pancytopenia is characteristic with unusually profound monocytopenia, variable reduction in platelets, and the presence in the peripheral blood and marrow of abnormal small lymphocytes having irregular cytoplasmic margins. Ultrastructure, combined with cytochemistry and flow cytometry, have refined diagnosis. A variant exists between this classical entity and B prolymphocytic leukaemia, where blastic transformation or massive lymph node enlargement are found, and this is of ominous significance. In all these patients with this entity conventional chemotherapy is ineffective and shortens survival. Our previous experience with splenectomy results in excellent clinical control for long periods of time, but without disease eradication. There followed a vogue for the use of interferon but this is limited by high cost and dose-dependent side-effects. Contemporary management centres on the purine analogues, where durable responses are possible with fludarabine and deoxycoformycin, but best with 2'chlorodeoxyadenosine (2-CDA). To document the efficacy of the latter agent, we analysed the outcome in seventeen consecutive patients treated over the last five years. Four were ineligible for analysis, although two had 2-CDA. The other thirteen, managed on a standard seven-day course of 0.1 mg/kg 2-CDA given as a continuous intravenous infusion, all responded promptly. Apart from transient leucopenia complications have been minimal, and oral co-trimoxazole prophylaxis for pneumocystis carinii was maintained during the first one year. In all thirteen there was a rapid return to normal of peripheral blood count and marrow on aspiration and trephine biopsy. Even in the longest follow-up clinical and haematologic remission has been maintained and no patients have required retreatment. One individual has relapsed in the marrow at two years. Despite the relative expense of the agent the excellent treatment outcome and patient acceptability, coupled with its safety, leads to the recommendation that in South Africa - as elsewhere in the world - this be regarded as the first line of treatment.
Primary amyloidosis is a plasma cell dyscrasia characterised by excess production of abnormal immunoglobulin light chains with their subsequent accumulation in kidneys, heart, liver as well as ...gastrointestinal tract and bone marrow 1-2. These tissue deposits take the form of a fibrillar protein which damages the involved organ in proportion to the extent of the infiltration and roughly parallels the duration of the disease. Most cases have evidence of the underlying lymphoplasmacytoid neoplasm recognisable in two ways. Firstly, the monoc1one appears in the serum 2. Secondly is a morphologically and immunohistochemically distinctive cellular infiltrate in the bone marrow 3 that has a specific microscopic and ultrastructural pattern 4-5. Interestingly occasional patients, who survive long enough, may progress to multiple myeloma 6 but the correlation is variable 7.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
ABSTRACT
Multiple sclerosis (MS) is believed to be an autoimmune process occurring in genetically susceptible individuals after an appropriate environmental exposure. We have exploited the ...homogeneous Afrikaner population of European ancestry to investigate the likelihood that iron dysregulation, in association with infectious and/or autoimmune disease susceptibility, may underlie the MS phenotype in a subgroup of patients. The functional Z-DNA forming repeat polymorphism of the natural resistance-associated macrophage protein-1 (NRAMP1) gene was analyzed in 104 patients diagnosed with MS and 522 Caucasian controls. A family-based control group consisting of 32 parental alleles not transmitted to MS offspring was additionally studied to exclude the likelihood of population substructures. Statistically significant differences in allelic distribution were observed between the patient and control samples drawn from the same population (P < 0.01). Evidence is furthermore provided that alleles considered to be detrimental in relation to autoimmune disease susceptibility may be maintained in the population as a consequence of improved survival to reproductive age following infectious disease challenge. Although it remains to be determined whether the disease phenotype in MS patients with allele 5 of the NRAMP1 promoter polymorphism is directly related to dysregulation of iron or modified susceptibility to viral infection and/or autoimmunity, a combination of these processes most likely underlies the disease phenotype in these patients. In view of the emerging role of polymorphic variants in complex diseases and minimizing of possible confounding factors in this association study, we conclude that allelic variation in the NRAMP1 promoter may contribute significantly to MS susceptibility in the South African Caucasian population.
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