10 research outputs found
A biokémia alapjai
MĂĄsodik vĂĄltozatlan utĂĄnnyomĂĄsElĆszĂł
A biokĂ©mia az egyik legdinamikusabban fejlĆdĆ modem tudomĂĄnyĂĄg, nagy hatĂĄssal van az Ă©lĆ anyaggal foglalkozĂł tudomĂĄnyokra, sok esetben irĂĄnyĂtja azok fejlĆdĂ©sĂ©t. EredmĂ©nyei megjelennek a mindennapi Ă©letben, meghatĂĄrozĂł jelentĆsĂ©gƱek az egĂ©szsĂ©gtudomĂĄnyokban, de ĂĄtszövik a mindennapjainkat, az Ă©let szĂĄmos terĂŒletĂ©t is. EzĂ©rt a biokĂ©mia az egĂ©szsĂ©gĂŒgyi fĆiskolai tananyagban az szĂŒksĂ©gszerƱen az alaptantĂĄrgyak közĂ© kerĂŒlt. A tantĂĄrgy elsĆdleges feladata azoknak az elveknek a megismertetĂ©se, amelyekre a kĂ©sĆbbi szakmaspecifikus tantĂĄrgyak alapozhatnak.
A jegyzet anyagĂĄnak összeĂĄllĂtĂĄsĂĄnĂĄl a mĂĄr Ă©vtizedes oktatĂĄsi tapasztalatokat összefoglalĂł biokĂ©mia tankönyv a âLehninger, Nelson, Cox: Priciples of Biochemistryâ tematikĂĄjĂĄt vettĂŒk alapul. A jegyzet termĂ©szetesen nem egyszerƱen rövidĂtett vĂĄltozata ennek a tankönyvnek. Kimaradtak olyan fejezetek, amelyek mĂĄs tantĂĄrgyban mĂĄr elĆfordulnak, Ăgy lehetĆsĂ©g maradt mĂĄs fejezetek rĂ©szletesebb tĂĄrgyalĂĄsĂĄra. Egyes tĂ©makörök kibĆvĂtĂ©sĂ©t az egyes szakok speciĂĄlis igĂ©nyein tĂșl az is indokolja, hogy a fĆiskola hallgatĂłi nagyon eltĂ©rĆ elĆtanulmĂĄnyokkal rendelkeznek. Ăgy talĂĄn több segĂtsĂ©get kapnak a jegyzet olvasĂĄsĂĄval azok a hallgatĂłk, akik szĂĄmĂĄra az elĆadĂĄsok nehĂ©znek bizonyultak.
A tananyag tovĂĄbbra is az elĆadĂĄsokon elhangzott ismeretanyag lesz, a jegyzet a tanulĂĄs segĂ©deszközĂ©nek tekinthetĆ. Eddigi tapasztalataink alapjĂĄn, a szƱkös tanidĆbe a jegyzetben leĂrt tĂ©mĂĄknak csak töredĂ©ke fĂ©r bele.
A jegyzet megĂrĂĄsĂĄhoz, szerkesztĂ©sĂ©hez nagyon sok segĂtsĂ©get kaptam a POTE BiokĂ©mia IntĂ©zet munkatĂĄrsaitĂłl, amiĂ©rt köszönetemet ezĂșton fejezem ki
UCH-L1 Cooperates with BCL6 and Identifies Patients with Aggressive Germinal Center Diffuse Large B-Cell Lymphoma
Retinol Saturase Knock-Out Mice are Characterized by Impaired Clearance of Apoptotic Cells and Develop Mild Autoimmunity
Apoptosis and the proper clearance of apoptotic cells play a central role in maintaining tissue homeostasis. Previous work in our laboratory has shown that when a high number of cells enters apoptosis in a tissue, the macrophages that engulf them produce retinoids to enhance their own phagocytic capacity by upregulating several phagocytic genes. Our data indicated that these retinoids might be dihydroretinoids, which are products of the retinol saturase (RetSat) pathway. In the present study, the efferocytosis of RetSat-null mice was investigated. We show that among the retinoid-sensitive phagocytic genes, only transglutaminase 2 responded in macrophages and in differentiating monocytes to dihydroretinol. Administration of dihydroretinol did not affect the expression of the tested genes differently between differentiating wild type and RetSat-null monocytes, despite the fact that the expression of RetSat was induced. However, in the absence of RetSat, the expression of numerous differentiation-related genes was altered. Among these, impaired production of MFG-E8, a protein that bridges apoptotic cells to the αvÎČ3/ÎČ5 integrin receptors of macrophages, resulted in impaired efferocytosis, very likely causing the development of mild autoimmunity in aged female mice. Our data indicate that RetSat affects monocyte/macrophage differentiation independently of its capability to produce dihydroretinol at this stage
Aminoglycosides as Potential Pharmacogenetic Agents in the Treatment of HaileyâHailey Disease
Biogenesis of cytosolic ribosomes requires the essential ironâsulphur protein Rli1p and mitochondria
Mitochondria perform a central function in the biogenesis of cellular ironâsulphur (Fe/S) proteins. It is unknown to date why this biosynthetic pathway is indispensable for life, the more so as no essential mitochondrial Fe/S proteins are known. Here, we show that the soluble ATP-binding cassette (ABC) protein Rli1p carries N-terminal Fe/S clusters that require the mitochondrial and cytosolic Fe/S protein biogenesis machineries for assembly. Mutations in critical cysteine residues of Rli1p abolish association with Fe/S clusters and lead to loss of cell viability. Hence, the essential character of Fe/S clusters in Rli1p explains the indispensable character of mitochondria in eukaryotes. We further report that Rli1p is associated with ribosomes and with Hcr1p, a protein involved in rRNA processing and translation initiation. Depletion of Rli1p causes a nuclear export defect of the small and large ribosomal subunits and subsequently a translational arrest. Thus, ribosome biogenesis and function are intimately linked to the crucial role of mitochondria in the maturation of the essential Fe/S protein Rli1p