Prka, Željko (2019) Prognostičko značenje izraženosti Fas, FasL i c-FLIP u klasičnom Hodgkinovom limfomu. PhD thesis, Sveučilište u Zagrebu.
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Abstract
Hodgkin/Reed Sternberg cell is a cell of lymphocyte B origin and due to its complex interactions with its microenvironment, is responsible for biological and clinical manifestations of Hodgkin lymphoma. HRS cells usually lack B-cell receptor (BcR). Normal lymph node cells without BcR undergo Fas (CD95)-mediated apoptosis. Mechanisms of HRS cell survival, although explored, have not been truly elucidated yet. It is believed that c-FLIP mediates resistance of HRS to Fasmediated apoptosis. Correlation between immunohistochemical expression of apoptosis markers and clinical and laboratory parameters integrated in standardized prognostic indexes (EORTC/GHSG/IPS) in our study cohort showed for the first time that patients with stronger c- FLIP expression had significantly more lymphopenias. Also, expression of c-FLIP showed strong correlation to nodular sclerosis subtype, which is the most common histologic type of Hodgkin lymphoma. C-FLIP expression did not correlate with unfavourable prognosis according to GHSG, EORTC and IPS. There were significantlly less patients with unfavourable IPS score in group of patients with stronger FasL expression. Also, patients with stronger FasL expression had significantly less anemia compared to those without it. Comparison of Fas, FasL and c-FLIP expression with other clinical and laboratory parameters did not show any statistically significant correlations. Expression of any of these proteins did not show influence on overall survival or time to disease progression in our study cohort.
Abstract in Croatian
Hodgkinova/Reed Sternbergova stanica je stanica porijekla B limfocita i kompleksnim interakcijama sa svojim okolišem odgovorna je za biološke i kliničke efekte bolesti. HRS stanice obično nemaju izražen B-stanični receptor (BcR). Normalne stanice germinativnog centra limfnog čvora koje nemaju izražen ovaj receptor eliminiraju se preko apoptotičkog puta ovisnog o Fas. Smatra se da je za rezistenciju HRS stanice na Fas posredovanu apoptozu odgovoran c- FLIP protein. Iako je patogeneza Hodgkinovog limfoma, a time i mehanizmi preživljavanja Reed Sternbergove stanice već dugo istraživana, postoji malo relevantnih radova o utjecaju Fas i FasL proteina na klinički tijek i prognozu bolesti. Korelacijom između imunohistokemijske ekspresije markera apoptoze i laboratorijsko-kliničkih parametara koji sačinjavaju poznate prognostičke indekse (EORTC/GHSG, IPS) u našoj kohorti bolesnika utvrdili smo po prvi puta da bolesnici s jačom ekspresijom c-FLIP proteina na HRS stanici imaju značajno češće limfopeniju te da je jaka ekspresija c-FLIP-a povezana s podtipom nodularne skleroze, koji je i najčešći histološki tip Hodgkinovog limfoma. No, c-FLIP ekspresija nije bila povezana s prognostički nepovoljnom skupinom bolesnika prema GHSG, EORTC i IPS skorovima. FasL ekspresija nije bila povezana s prognostički nepovoljnom skupinom bolesnika prema GHSG, EORTC skorovima, ali je bila povezana s prognostički povoljnom podgrupom bolesnika prema IPS skoru. Također, jača ekspresija FasL povezana je sa značajno nižom učestalošću anemije. Usporedbom ekspresije Fas, FasL i c-FLIP s ostalim kliničkim karakteristikama bolesnika i njihove bolesti nismo utvrdili statistički značajne korelacije. Nije bilo utjecaja jačine ekspresije navedenih proteina, pa ni c- FLIP-a na ukupno preživljenje ili vrijeme do progresije bolesti.
Item Type: | Thesis (PhD) | ||||
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Mentors: |
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Departments: | Izvan medicinskog fakulteta | ||||
Depositing User: | Anja Majstorović | ||||
University: | Sveučilište u Zagrebu | ||||
Institution: | Medicinski fakultet | ||||
Number of Pages: | 70 | ||||
Status: | Unpublished | ||||
Creators: |
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Date: | 17 April 2019 | ||||
Date Deposited: | 03 Jul 2019 11:31 | ||||
Last Modified: | 03 Jul 2019 11:31 | ||||
Subjects: | / | ||||
Related URLs: | |||||
URI: | http://medlib.mef.hr/id/eprint/3342 |
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