Title
Effects of anthocyanins and their metabolites on the function of human endothelial cells and platelets in vitro
Creator
Krga, Irena S., 1989-
Copyright date
2018
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
Dozvoljavate samo preuzimanje i distribuciju dela, ako/dok se pravilno naznačava ime autora, bez ikakvih promena dela i bez prava komercijalnog korišćenja dela. Ova licenca je najstroža CC licenca. Osnovni opis Licence: http://creativecommons.org/licenses/by-nc-nd/3.0/rs/deed.sr_LATN. Sadržaj ugovora u celini: http://creativecommons.org/licenses/by-nc-nd/3.0/rs/legalcode.sr-Latn
Language
English
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 21.09.2018.
Other responsibilities
mentor
Glibetić, Marija, 1958-
mentor
Milenković, Dragan
član komisije
Mandić, Ljuba, 1953-
član komisije
Jevđović, Tanja
član komisije
Beaudoin, Claude
član komisije
Layé, Sophie
Academic Expertise
Prirodno-matematičke nauke
Academic Title
-
University
Univerzitet u Beogradu
Faculty
Biološki fakultet
Alternative title
Uticaj antocijana i njihovih metabolita na funkciju endotelnih ćelija i trombocita čoveka in vitro
Publisher
[I. S. Krga]
Format
154 lista
description
Biological Sciences - Human nutrition / Biologija - Integrisane nauke o ishrani
Abstract (en)
Increasing number of scientific evidence suggests the beneficial role of dietary
anthocyanins, phytochemicals mainly present in berries and derived products, in
cardiovascular health. These anthocyanin health benefits may be attributed to their effect
on endothelial cells or platelets that represent the key players in the development of
cardiovascular diseases (CVD). However, the exact molecular mechanisms underlying
anthocyanin cardioprotective effects are not fully understood. The aim of this thesis was
to investigate the effect of anthocyanins and their metabolites in vitro on endothelial and
platelet function and identify the underlying mechanisms of their action using
physiologically relevant conditions.
Results from this thesis showed that the pretreatment of endothelial cells with
physiologically relevant concentrations of circulating anthocyanins and their metabolites
attenuated monocyte adhesion to activated endothelial cells as well as their
transendothelial migration, which are the initial steps in the development of
atherosclerosis that precede CVD. In agreement with these results, gene expression
analysis revealed that the treatment of endothelial cells with these compounds modulated
the expression of genes involved in regulation of cell-cell adhesion, actin cytoskeleton
reorganisation, focal adhesion and leukocyte transmigration. Bioinformatics analyses of
gene expression data allowed the identification of potential transcription factors involved
in the observed nutrigenomic effects and cell signalling proteins regulating their activity.
Molecular docking analyses further revealed cell signalling proteins to which these
bioactives may bind to and potentially affect their activity and the activation of
downstream signalling proteins and transcription factors, effects that were in agreement
with the results of Western blot analyses. Anthocyanins and their metabolites also
modulated the expression of microRNAs, especially those involved in regulation of
endothelial cell permeability, contributing to the observed changes in endothelial cell
function...
Abstract (sr)
Kardiovaskularne bolesti predstavljaju oboljenja koja zahvataju srce i krvne sudove i
najčešći su uzrok obolevanja i umiranja u svetu. Prema mestu javljanja mogu se podeliti
na bolesti srca, cerebrovaskularne bolesti i bolesti perifernih krvnih sudova. Osnovni
uzročnik kardiovaskularnih bolesti je ateroskleroza, hronično zapaljensko oboljenje
velikih i srednje velikih arterijskih krvnih sudova koje se karakteriše aterosklerotičnim
lezijama koje nastaju nakupljanjem lipida, ćelija i proteina vezivnog tkiva unutar zida
krvnog suda. Ove patološke promene krvnih sudova ometaju normalan protok krvi, a u
kasnijim stadijumima bolesti mogu dovesti i do pucanja plaka i aterotromboze, što za
posledicu može imati infarkt miokarda ili šlog. Sam nastanak ateroskleroze povezan je sa
poremećenom funkcijom endotela krvnog suda koja podstiče adheziju leukocita za
aktivirane endotelne ćelije i njihovu transendotelnu migraciju. Unutar zida krvnog suda
monociti se diferenciraju u makrofage, vrše ingestiju oksidovanog LDL holesterola i
formiraju penušave ćelije čije nakupljanje vremenom dovodi do formiranja
aterosklerotičnih lezija. Važnu ulogu u nastanku ateroskleroze imaju i trombociti.
Interakcija aktiviranih trombocita sa leukocitima i endotelnim ćelijama podstiče adheziju
leukocita i njihovu transendotelnu migraciju i time dodatno podstiče zapaljenski proces i
razvoj ateroskleroze. Stoga, ispitivanje uzajamnog delovanja endotelnih ćelija, leukocita
i trombocita predstavlja značajno područje istraživanja u cilju prevencije i kontrole
kardiovaskularnih bolesti.
Ishrana ima važnu ulogu, kako u nastanku i razvoju kardiovaskularnih bolest, tako i
u njihovoj prevenciji i lečenju. Rezultati brojnih epidemioloških i kliničkih studija
pokazuju povoljno delovanje ishrane bogate voćem i povrćem na kardiovaskularno
zdravlje. Ovo pozitivno delovanje namirnica biljnog porekla pripisuje se delom njihovom
niskom energetskom vrednošću, visokom sadržaju vlakana i esencijalnih
mikronutrijenata, ali pre svega nenutritivnim, biološki aktivnim sastojcima, poput
polifenola...
Abstract (fr)
Les maladies cardiovasculaires sont un groupe de troubles qui affectent le coeur et les
vaisseaux sanguins et qui représentent la principale cause de morbidité et de mortalité
dans le monde. Ils comprennent les maladies coronariennes, les maladies
cérébrovasculaires et les maladies artérielles périphériques, avec l'athérosclérose étant le
principal processus pathologique sous-jacent de leur développement. L'athérosclérose,
une maladie inflammatoire chronique des artères de gros et moyen calibre, est
caractérisée par des lésions athéromateuses qui sont formées par l'accumulation de
lipides, des éléments cellulaires et fibreux dans la paroi artérielle. Ces lésions perturbent
le flux sanguin et dans les cas les plus graves tel que la rupture de la plaque et la thrombose
peuvent entraîner un infarctus du myocarde ou accident vasculaire cérébral.
L'athérosclérose est initiée par des altérations de la fonction endothéliale qui favorisent
le recrutement et l'adhérence des leucocytes circulants et leur migration transendothéliale
dans la paroi du vaisseau sanguin. Dans l'espace sous-endothélial, les leucocytes se
différencient en macrophages activés, prennent lipoprotéine oxydée et forme les cellules
spumeuses, ce qui conduit à à la formation de lésions athéromateuses. Les plaquettes
contribuent également au développement de ce trouble par leurs interactions avec les
leucocytes et les cellules endothéliales qui se produisent lors de l'activation plaquettaire.
Ces interactions favorisent l'adhésion leucocytaire et la migration transendothéliale,
augmentant ainsi les réponses inflammatoires et la progression de l'athérosclérose. Par
conséquent, l'interaction entre les cellules endothéliales, les plaquettes et les leucocytes
représentent une cible intéressante pour la prévention des maladies cardiovasculaires.
L'alimentation est un facteur important dans la promotion et le maintien de la santé...
Authors Key words
anthocyanins, metabolites, endothelial dysfunction, monocyte-endothelial
cell adhesion, monocyte transendothelial migration, platelet activation, platelet-leukocyte
aggregation
Authors Key words
antocijani, metaboliti, endotelna disfunkcija, adhezija monocita za
endotelne ćelije, transendotelna migracija, aktivacija trombocita, agregacija trombocita
sa leukocitima
Classification
[547.62+581.574]:[611.018.74:611.018.52] (043.3)
Type
Tekst
Abstract (en)
Increasing number of scientific evidence suggests the beneficial role of dietary
anthocyanins, phytochemicals mainly present in berries and derived products, in
cardiovascular health. These anthocyanin health benefits may be attributed to their effect
on endothelial cells or platelets that represent the key players in the development of
cardiovascular diseases (CVD). However, the exact molecular mechanisms underlying
anthocyanin cardioprotective effects are not fully understood. The aim of this thesis was
to investigate the effect of anthocyanins and their metabolites in vitro on endothelial and
platelet function and identify the underlying mechanisms of their action using
physiologically relevant conditions.
Results from this thesis showed that the pretreatment of endothelial cells with
physiologically relevant concentrations of circulating anthocyanins and their metabolites
attenuated monocyte adhesion to activated endothelial cells as well as their
transendothelial migration, which are the initial steps in the development of
atherosclerosis that precede CVD. In agreement with these results, gene expression
analysis revealed that the treatment of endothelial cells with these compounds modulated
the expression of genes involved in regulation of cell-cell adhesion, actin cytoskeleton
reorganisation, focal adhesion and leukocyte transmigration. Bioinformatics analyses of
gene expression data allowed the identification of potential transcription factors involved
in the observed nutrigenomic effects and cell signalling proteins regulating their activity.
Molecular docking analyses further revealed cell signalling proteins to which these
bioactives may bind to and potentially affect their activity and the activation of
downstream signalling proteins and transcription factors, effects that were in agreement
with the results of Western blot analyses. Anthocyanins and their metabolites also
modulated the expression of microRNAs, especially those involved in regulation of
endothelial cell permeability, contributing to the observed changes in endothelial cell
function...
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