Globálny slovník portálu IMED

Pojem: 
Extrakraniální radioterapie a radiochirurgie
Definícia: 

Extrakraniální stereotaktická radioterapie/radiochirurgie (SBRT – stereotactic body radiotherapy) využívá velmi přesné aplikace vysoké jednotlivé dávky záření v malém počtu frakcí. Díky stále lepší vybavenosti radioterapeutických pracovišť z hlediska možností obrazové navigace a fixace pacientů lze stereotaktický přístup využít prakticky ve všech anatomických lokalitách. S výhodou nalézá uplatnění zvláště při léčbě nádorových ložisek v plících, játrech, dutině břišní či pánvi a ve skeletu.

Kľúčové slovo: 
Radiochirurgie
Pojem: 
syndróm nedostatku testosterónu - TDS
Definícia: 

<div>TDS (testosterone deficiency syndrome) je definovan&yacute; ako klinick&yacute; a biochemick&yacute; syndr&oacute;m, ku ktor&eacute;mu doch&aacute;dza v procese starnutia mužov. Nedostatok testoster&oacute;nu u postihnut&yacute;ch mužov nepriaznivo vpl&yacute;va na funkcie viacer&yacute;ch org&aacute;nov&yacute;ch syst&eacute;mov. Vedie k podstatn&eacute;mu zhor&scaron;eniu kvality života. U mužov medzi 40 - 70 rokmi kles&aacute; biologicky akt&iacute;vny testoster&oacute;n v s&eacute;re približne o 1,2 % ročne.</div>

Pojem: 
Spolupráca endokrinológa a oftalmológa pri endokrinnej orbitopatii
Definícia: 

Práca sa venuje návodu, ako by mala vyzerať spolupráca oftalmológa s endokrinológom a zbytočným chybám, ku ktorým často zbytočne dochádza.

Kľúčové slovo: 
hrúbka extraokulárnych svalov
vnútroočný tlak
epidemiologické faktory
Endokrinná orbitopatia
farebná dopplerovská ultrasonografia
Pojem: 
Epithelial-mesenchymal transition (EMT) – epiteliálno-mezenchymálny prechod
Definícia: 

<p>
<pre>je fyziologick&yacute; proces prebiehaj&uacute;ci v embryogen&eacute;ze a pri hojen&iacute; r&aacute;n. Prejavuje sa aj v patologick&yacute;ch procesoch tumorigen&eacute;zy, ako s&uacute; inici&aacute;cia
a progresia n&aacute;dorov. Z&aacute;kladnou vlastnosťou EMT je strata epitelovej morfol&oacute;gie bunky a z&iacute;skanie vlastnost&iacute;, ktor&eacute; s&uacute; podobn&eacute; fibroblastom. Je
to sp&ocirc;soben&eacute; najm&auml; zn&iacute;ženou expresiou E-kadher&iacute;nu v d&ocirc;sledku aktiv&aacute;cie transkripčn&eacute;ho komplexu TCF/LEF s b-katen&iacute;nom, ako aj transkripčn&yacute;ch
faktorov Twist, Snai1, ZEB, ktor&yacute;ch aktivita koreluje s fenotypom kmeňov&yacute;ch buniek.</pre>
</p>

Kľúčové slovo: 
iniciácia a progresia nádorov
Pojem: 
Nasýtené mastné kyseliny (NMK)
Definícia: 

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<p class=\"MsoNormal\"><strong><span style=\"font-size: 12pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;\"><span></span></span></strong><span style=\"font-size: 12pt; line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;\">maj&uacute; druh&yacute; najvy&scaron;&scaron;&iacute; aterog&eacute;nny potenci&aacute;l. NMK nie s&uacute; len v&nbsp;živoč&iacute;&scaron;nych tukoch (maslo 62 %, bravčov&aacute; masť 40 %), ale aj v&nbsp;niektor&yacute;ch rastlinn&yacute;ch tukoch (kokosov&yacute; a&nbsp;palmov&yacute; olej). Zatiaľ st&aacute;le ch&yacute;ba legislat&iacute;va určuj&uacute;ca povinnosť v&yacute;robcu jasne deklarovať množstvo TFMK a&nbsp;NMK v&nbsp;potravin&aacute;ch.</span></p>

Kľúčové slovo: 
aterogénny potenciál
Pojem: 
Imunita prirodzená (nešpecifická)
Definícia: 

<p>
&nbsp;</p>
<p>
&ndash; s&uacute;bor reakci&iacute;, ktor&eacute; s&uacute; v organizme pr&iacute;tomn&eacute; od narodenia a nez&aacute;visia od ich predch&aacute;dzaj&uacute;ceho stretnutia s antig&eacute;nom.</p>

Kľúčové slovo: 
imunita
Pojem: 
Imunita adaptívna (špecifická)
Definícia: 

<p>
&nbsp;</p>
<p>
<strong>&nbsp;</strong>&ndash; schopnosť organizmu reagovať na cudzorod&yacute; antig&eacute;n &scaron;pecifickou imunitnou odpoveďou, a to buď protil&aacute;tkov&eacute;ho alebo bunkov&eacute;ho typu. Protil&aacute;tky alebo efektorov&eacute; bunky reaguj&uacute; iba s t&yacute;m antig&eacute;nom, na ktor&eacute;ho podnet vznikli.</p>

Kľúčové slovo: 
antigén
Pojem: 
meniskus kolena
Definícia: 

<p>
&uacute;tvar kos&aacute;kovit&eacute;ho tvaru, tvoren&yacute; v&auml;zivovou chrupkou, ktor&yacute; nekompletne rozdeľuje kĺbnu &scaron;trbinu&nbsp;</p>

Kľúčové slovo: 
meniskus
Pojem: 
meniskektómia
Definícia: 

<p>
chirurgick&eacute; odstr&aacute;nenie časti alebo cel&eacute;ho menisku&nbsp;</p>

Kľúčové slovo: 
menisktektómia
Pojem: 
sutúra menisku
Definícia: 

<p>
zo&scaron;itie roztrhnut&eacute;ho menisku</p>

Kľúčové slovo: 
sutúra
Pojem: 
waiting list, WL
Definícia: 

<p>
seznam čekatelů na transplantaci</p>

Pojem: 
transplantace
Definícia: 

<p>
přenesen&iacute; tk&aacute;ňe nebo org&aacute;nu na jin&eacute; m&iacute;sto organizmu nebo do druh&eacute;ho organizmu</p>

Pojem: 
Vakcinácia
Definícia: 

<p>
<span style=\"font-size:14px;\"><span style=\"font-family: tahoma, geneva, sans-serif; \"><b style=\"line-height: 22.592594146728516px; \">Očkovanie</b><span class=\"apple-converted-space\" style=\"line-height: 22.592594146728516px; \">&nbsp;</span><span style=\"line-height: 22.592594146728516px; \">alebo odborne<span class=\"apple-converted-space\">&nbsp;</span><b>vakcin&aacute;cia</b><span class=\"apple-converted-space\">&nbsp;</span>&nbsp;je podanie očkovacej l&aacute;tky - vakc&iacute;ny (z lat. vacca &ndash; krava) do organizmu, ktor&yacute; si n&aacute;sledne vytvor&iacute; ochrann&eacute; protil&aacute;tky</span><span class=\"apple-converted-space\" style=\"line-height: 22.592594146728516px; \">&nbsp;</span><span style=\"line-height: 22.592594146728516px; \">proti antig&eacute;nom&nbsp;</span><span style=\"line-height: 22.592594146728516px; \">obsiahnut&yacute;m vo vakc&iacute;ne. Tie potom maj&uacute; človeka &nbsp;chr&aacute;niť pred infekciou vyvolanou patog&eacute;nmi</span><span style=\"line-height: 22.592594146728516px; \">, ktor&eacute; by neočkovan&eacute;mu jedincovi inak mohli sp&ocirc;sobiť ochorenie</span><span style=\"line-height: 22.592594146728516px; \">. Z&aacute;roveň v&scaron;ak mus&iacute; byť eliminovan&yacute; infekčn&yacute; potenci&aacute;l (patogenita) samotnej vakc&iacute;ny. Vakc&iacute;ny m&ocirc;žu obsahovať živ&eacute; oslaben&eacute; (atenuovan&eacute;) alebo neživ&eacute; (inaktivovan&eacute;) mikroorganizmy, anatox&iacute;n</span><span class=\"apple-converted-space\" style=\"line-height: 22.592594146728516px; \">&nbsp;</span><span style=\"line-height: 22.592594146728516px; \">(toxoid) pr&iacute;padne len niektor&eacute; antig&eacute;nne &scaron;trukt&uacute;ry mikroorganizmov (prote&iacute;ny, polysacharidy).</span></span></span></p>
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Kľúčové slovo: 
očkovacia látka
Pojem: 
povinné pravidelné očkovanie
Definícia: 

<p>
Očkovanie proti vybran&yacute;m ochoreniam, vykon&aacute;van&eacute; v presne stanoven&yacute;ch term&iacute;noch podľa očkovacieho kalend&aacute;ra. Je zo z&aacute;kona povinn&eacute; a spravidla hraden&eacute; zdravotnou poisťovňou.</p>

Kľúčové slovo: 
očkovací kalendár
Pojem: 
Interleukín-2 (IL-2)
Definícia: 

<p>
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<p>
je glykoprote&iacute;n; v z&aacute;vislosti od stupňa glykozyl&aacute;cie sa jeho molekulov&aacute; hmotnosť (M<sub>r</sub>) pohybuje medzi 14 000 až 17&nbsp;000. Produkuj&uacute; ho predov&scaron;etk&yacute;m T-lymfocyty, najm&auml; pomocn&eacute; (Th1), v men&scaron;ej miere aj in&eacute; bunky imunitn&eacute;ho syst&eacute;mu. IL-2 sa nadv&auml;zuje na svoj &scaron;pecifick&yacute; receptor (IL-2R). Sklad&aacute; sa z troch reťazcov - a, b a g. <strong>IL-2R</strong><strong>a-</strong>reťazec je polypeptid s M<sub>r</sub> 55 000 (p55;<strong> CD25</strong>) a v membr&aacute;ne bunky sa objavuje iba po jej aktiv&aacute;cii. Nadviazanie IL-2 na IL-2Ra v&scaron;ak nevedie k nijakej biologickej odpovedi. <strong>IL-2R</strong><strong>b</strong>-reťazec je takisto transmembr&aacute;nov&yacute; glykoprote&iacute;n s M<sub>r</sub> 75&nbsp;000. IL-2Rb sa exprimuje s&uacute;časne s tret&iacute;m reťazcom s M<sub>r</sub> 64 000 - <strong>IL-2R</strong><strong>g</strong>. Bunky, ktor&eacute; s&uacute;časne maj&uacute; aj IL-2Ra aj IL-2Rbg, viažu IL-2 s vy&scaron;&scaron;ou afinitou, približne 10<sup>-11 M. </sup>Predpoklad&aacute; sa, že IL-2 sa najprv viaže na IL-2Ra, čo n&aacute;sledne uľahč&iacute; jeho asoci&aacute;ciu s IL-2Rbg, č&iacute;m sa vytvor&iacute; vysokoafinitn&yacute; receptor. Pokojn&eacute; bunky exprimuj&uacute; IL-2Rbg, ale nie IL-2Ra a m&ocirc;žu ich stimulovať iba vysok&eacute; d&aacute;vky IL-2. Po aktiv&aacute;cii T-lymfocytov sa v membr&aacute;ne bunky r&yacute;chlo objav&iacute; IL-2Ra - jeho synt&eacute;zu indukuje s&aacute;m IL-2. IL-2 je takto typick&yacute; autokrinn&yacute; cytok&iacute;n. Vzniknut&yacute; vysokoafinitn&yacute; receptor podstatnou mierou zn&iacute;ži prah aktiv&aacute;cie potrebn&yacute; na indukciu prolifer&aacute;cie Th-lymfocytov. Z tejto vlastnosti IL-2 vypl&yacute;val aj jeho p&ocirc;vodn&yacute; n&aacute;zov - rastov&yacute; faktor pre T-lymfocyty (TCGF - <strong><em>T</em></strong><em> <strong>c</strong>ell <strong>g</strong>rowth <strong>f</strong>actor</em>). Nadviazan&iacute;m IL-2 na svoje receptory sa zač&iacute;naj&uacute; sa diferencovať a proliferovať, vznik&aacute; klon buniek &scaron;pecifick&aacute; imunitn&aacute; odpoveď sa m&ocirc;že rozbehn&uacute;ť.&nbsp;</p>

Kľúčové slovo: 
T-lymfocyty

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