Lympho-myeloid és hemopoietikus szervek fejlődésbiológiája: embryomanipuláció = Development of the lympho-myeloid and hemopoietic organs: embryo manipulation
2007
A palyazat fő celja volt a bursai szekrecios dendritikus (BSDC), a follikularis dendritikus (FDC) es a Langerhans sejtek (LC) eredetenek es differencialodasanak vizsgalata. BSDC vereredetű sejtek terminalis differencialodasuk fugg az anyai eredetű antigenektől. A A fertőző bursa betegseget okozo virus előszor a BSDC-ben mutathato ki, bizonyitva, hogy a BSDC az elsőrendű celsejtje a virusoknak. 5-fluorouracil okozta heterophil deplecio eliminalja a virusfertőzes okozta mortalitast es a sulyos klinikai tuneteket es emeli a BSDC-k szamat. A heterophil granulocytak a BSDC-vel egyutt jelentős szerepet jatszanak a fertőző bursa betegseg (Gumboro) klinikai tuneteinek kialakulasaban. Az LC hapten kezeles hatasara kivandorolnak az epidermisből es subcutan előfordulo lymphoid nodulusokban jelennek meg. A lep ellipszoidhoz-asszocialt sejtei (EAC) hemopoietikus eredetűek. Az EAC az egyetlen olyan phagocyta tulajdonsagu sejt, amely internalizalja a β-galactozidazt ez pedig elinditja az EAC migraciojat a T dependens teruletek (PALS) es a csiracentrumok fele. Monoklonalis antitest (E5G12) felismeri az EAC-t es az FDC-t is, mely lehetőseget adott kettős festesre (β-gal hisztokemia es E5G12 immuncytokemia). A kettős festes egyertelmű bizonyitekot szolgaltatott arra, hogy a lep csiracentrumok FDC-jei EAC eredetűek. A csirke embryok vereben periferias ver fibrocytak jelen vannak, melyek hozzajarulnak a lep organogenesisehez. Ez a munka vezetett az a lep ellipszoidok koruli Schweigger-Seidel huvely tokjanak felfedezesehez. A csirkek gastrointestinalis traktusaban oesophagealis es pylorus tonsillak kerultek leirasra. | The origin and differentiation of bursal secretory dendritic (BSDC), follicular dendritic (FDC), and Langerhans cells (LC) have been studied. BSDC are blood-borne hemopoietic cells, and their differentiation depends on maternal antigen. The antibody against infectious bursal disease viruses indicates that the BSDC are primary targets of the IBDV. Depletion of heterophil granulocytes by 5-fluorouracil results in elimination of major clinical symptoms and mortality, increase the number of BSDC. After hapten treatment the Langerhans cells migrate out of the epidermis and appear in the subcutaneous lymph nodules. The splenic ellipsoid-associated cells (EAC) are blood-borne cells. They exclusively internalize the β-galactosidase, which initiate their migration to the T dependent region (PALS) and germinal centers. Monoclonal antibody E5G12, recognizes EAC and splenic FDC. Double-staining (β-galactosidase histochemistry) and E5G12 immunocytochemistry provided clearcut evidence that the EAC were precursors of FDC. No double labeled cells were found in the GC of the GALT, which might indicate that the origin of splenic and GALT FDC have had different origin. The presence of the avian peripheral blood fibrocytes in the circulation contribute to the splenic extracellular matrix, which forms arround the ellipsoid a discontinuous sheath, what we called "capsule of Schweigger-Seidel sheath" (CSS). We have identified oesophageal and duodenal tonsils, which are specific for the birds.
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