Hypertension and nephrology

[Therapeutic apheresis in pediatry]

TÚRI Sándor, BERECKI Csaba, HASZON Ibolya, PAPP Ferenc

OCTOBER 20, 2013

Hypertension and nephrology - 2013;17(03-04)

[The possible mechanisms of therapeutic plasma mexchange: 1. the removal of circulatory plasma factor (anti Gbm disease, myasthenia gravis, Guillain Barré syndrome), 2. monoclonal antibody (Waldenström macroglobulinemia, myeloma protein), 3. circulatory immuncomplexes cryoglobulinaemia, myeloma protein, SLE), 4. alloantibody, 5. toxic factor, 6. replacement of a specific plasma factor, 7. a repear of the function of reticulo-endothelial system, 8. the removal of the inflammatory mediators, 9. the changes of the ratio of antigen-antibody which makes immuncomplexes more soluble, 10 stimulation of lymphocyte clones for supporting the cytotoxic therapy. Indications of emergency plasmapheresis: 1. Goodpasture syndrome with rapidly progressive glomerulonephritis and hemoptoe, 2. hyperviscosity syndrome, 3. TTP/HUS, 4. High level of factor VIII inhibitor, 5. respiratory insufficiency Guillain-Barré syndrome, 6. myasthenia gravis, 7. acute mushroom intoxication, or protein bound toxins. Further indications for plasmapheresis: 8. cryoglobulinemia, 9. other cases of rapidly progressive glomerulonephritis (when steroid+ cyclophosphamide are ineffective), 10. Wegener granulomatosis, 11. polyarteritis nodosa, 12. systemic lupus erythematosus (when steroid and cyclophosphamid therapy is not effective or associated with cerebral vasculitis, antiphospholipid syndrome combined with bleeding and thrombosis), 13. focal segmental glomerulosclerosis (resistant for therapy), 14. acute tubulointerstitial nephritis, 15. acute vascular rejection, 16. rheumatoid arthritis systemic type, 17. hypertrigliceridemia (≥25 mM), 18. thyreotoxic crisis, 19. acute necrotizing pancreatitis, 20. acute fulminant hepatitis, 21. paraquat intoxication, 22. snake bite (when antiserum is unavailable), 23. drug intoxication.]

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[Placental growth factor (PlGF) is a member of the proangiogenic VEGF-family; it is mainly produced by throphoblast cells. During the last years numerous studies have shown that circulating PlGF-level in maternal plasma is decreased and its suluble receptor sFlt-1 shows increased expression. In the present study we examined the prognostic accuracy of Alere Triage® PlGF-Assay in hypertensive disorders of pregnancy and its relation with the length of pregnancy. 130 pregnant women were involved in this case-control study (PE: 23, HELLP-syndrome: 20, superimposed praeeclampsia: 17, chronic hypertension: 25, gestational hypertension: 18 and normal control: 27). Blood draw occured between the 22nd and 34th gestational week. PlGF levels were measured by the Alere Triage® PlGF Assay using samples from the maternal plasma. The plasma PlGF-levels of women whose pregnancies were complicated by hypertensive disorders were significantnormotoly lower compared to those who had uncomplicated pregnancies and the decrease were greater in those patients who delivered before the 35th gestational week. The PlGF-test was positive in 93,7% of those women who delivered before the 35th gestational week and in 90,5% of those who delivered before the 37. gestational week. The vast majority of preeclamptic (PE: 95,7%, SIPE: 82,4%) and HELLP-syndrome (95%) patients had positive PlGF tests, the 60% of the chronic hypertension and the 44,4% of the gestational hypertension patients have also shown positive results. The main conclusion of this study is that the PlGF levels using maternal plasma are lower in those pregnancies which are complicated by hypertension and show strong correlation with the severity of the hypertensive disorder. We perceived high sensitivity values in detecting preeclampsia, HELLP-syndrome and superimposed preeclampsia. In the future we may use this method to separate high risk women for hypertensive disorders and it may improve the perinatal outcome]

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