scholarly journals Heat-shock protein 70-dependent dendritic cell activation by 5-aminolevulinic acid-mediated photodynamic treatment of human glioblastoma spheroids in vitro

2011 ◽  
Vol 105 (7) ◽  
pp. 961-969 ◽  
Author(s):  
N Etminan ◽  
C Peters ◽  
D Lakbir ◽  
E Bünemann ◽  
V Börger ◽  
...  
Keyword(s):  
Dendritic Cell ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Heat Shock Protein 70 ◽  
Cell Activation ◽  
Aminolevulinic Acid ◽  
Photodynamic Treatment ◽  
Dendritic Cell Activation ◽  
Human Glioblastoma

scholarly journals Interaction of human heat shock protein 70 with tumor-associated peptides

2009 ◽  
Vol 390 (4) ◽  
Author(s):  
Maya J. Pandya ◽  
Henriette Bendz ◽  
Florian Manzenrieder ◽  
Elfriede Noessner ◽  
Horst Kessler ◽  
...  
Keyword(s):  
T Cell ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
T Cell Activation ◽  
Heat Shock Protein 70 ◽  
Cell Activation ◽  
Peptide Sequence ◽  
Antigenic Peptides ◽  
Human Hsp70

Abstract Molecular chaperones of the heat shock protein 70 (Hsp70) family play a crucial role in the presentation of exogenous antigenic peptides by antigen-presenting cells (APCs). In a combined biochemical and immunological approach, we characterize the biochemical interaction of tumor-associated peptides with human Hsp70 and show that the strength of this interaction determines the efficacy of immunological cross-presentation of the antigenic sequences by APCs. A fluorescein-labeled cytosolic mammalian Hsc70 binding peptide is shown to interact with human Hsp70 molecules with high affinity (Kd=0.58 μm at 25°C). Competition experiments demonstrate weaker binding by Hsp70 of antigenic peptides derived from the tumor-associated proteins tyrosinase (Kd=32 μm) and melanoma antigen recognized by T cells (MART-1) (Kd=2.4 μm). Adding a peptide sequence (pep70) with high Hsp70 binding affinity (Kd=0.04 μm) to the tumor-associated peptides enables them to strongly interact with Hsp70. Presentation of tumor-associated peptides by B cells resulting in T cell activation in vitro is enhanced by Hsp70 when the tumor-associated peptides contain the Hsp70 binding sequence. This observation has relevance for vaccine design, as augmented transfer of tumor-associated antigens to APCs is closely linked to the vaccine's efficacy of T cell stimulation.

scholarly journals Gastric cancer-derived heat shock protein-gp96 peptide complex enhances dendritic cell activation

2017 ◽  
Vol 23 (24) ◽  
pp. 4390 ◽  
Author(s):  
Wen-Wen Lu ◽  
Hong Zhang ◽  
You-Ming Li ◽  
Feng Ji
Keyword(s):  
Gastric Cancer ◽  
Dendritic Cell ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Cell Activation ◽  
Dendritic Cell Activation ◽  
Peptide Complex ◽  
Heat Shock Protein Gp96

scholarly journals Heat-Shock Protein 70 as a Tumor Antigen for in vitro Dendritic Cell Pulsing in Renal Cell Carcinoma Cases

2014 ◽  
Vol 15 (20) ◽  
pp. 8947-8950 ◽  
Author(s):  
Fan-Dong Meng ◽  
Cheng-Guang Sui ◽  
Xin Tian ◽  
Yan Li ◽  
Chun-Ming Yang ◽  
...  
Keyword(s):  
Renal Cell Carcinoma ◽  
Dendritic Cell ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Cell Carcinoma ◽  
Tumor Antigen ◽  
Renal Cell ◽  
Heat Shock Protein 70

scholarly journals Heat Shock Protein 70 Improves In Vitro Embryo Yield and Quality from Heat Stressed Bovine Oocytes

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1794
Author(s):  
Konstantina Stamperna ◽  
Themistoklis Giannoulis ◽  
Eleni Dovolou ◽  
Maria Kalemkeridou ◽  
Ioannis Nanas ◽  
...  
Keyword(s):  
Gene Expression ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Heat Shock Protein 70 ◽  
Cumulus Cells ◽  
Intramolecular Interactions ◽  
Developmental Competence ◽  
Embryo Yield ◽  
Bovine Oocytes

Heat shock protein 70 (HSP70) is a chaperon that stabilizes unfolded or partially folded proteins, preventing inappropriate inter- and intramolecular interactions. Here, we examined the developmental competence of in vitro matured oocytes exposed to heat stress with or without HSP70. Bovine oocytes were matured for 24 h at 39 °C without (group C39) or with HSP70 (group H39) and at 41 °C for the first 6 h, followed by 16 h at 39 °C with (group H41) or without HSP70 (group C41). After insemination, zygotes were cultured for 9 days at 39 °C. Cleavage and embryo yield were assessed 48 h post insemination and on days 7, 8, 9, respectively. Gene expression was assessed by RT-PCR in oocytes, cumulus cells and blastocysts. In C41, blastocysts formation rate was lower than in C39 and on day 9 it was lower than in H41. In oocytes, HSP70 enhanced the expression of three HSP genes regardless of incubation temperature. HSP70 at 39 °C led to tight coordination of gene expression in oocytes and blastocysts, but not in cumulus cells. Our results imply that HSP70, by preventing apoptosis, supporting signal transduction, and increasing antioxidant protection of the embryo, protects heat stressed maturing bovine oocyte and restores its developmental competence.

scholarly journals Stimulation of the Human Heat Shock Protein 70 Promoter in Vitro by Simian Virus 40 Large T Antigen

1989 ◽  
Vol 264 (27) ◽  
pp. 16160-16164
Author(s):  
I C Taylor ◽  
W Solomon ◽  
B M Weiner ◽  
E Paucha ◽  
M Bradley ◽  
...  
Keyword(s):  
Heat Shock ◽  
Heat Shock Protein ◽  
Heat Shock Protein 70 ◽  
Simian Virus 40 ◽  
Simian Virus ◽  
T Antigen ◽  
Large T Antigen ◽  
Human Heat Shock Protein ◽  
Stimulation Of

scholarly journals A Role for Toll-Like Receptor 4 in Dendritic Cell Activation and Cytolytic CD8+ T Cell Differentiation in Response to a Recombinant Heat Shock Fusion Protein

2004 ◽  
Vol 172 (5) ◽  
pp. 2885-2893 ◽  
Author(s):  
Deborah Palliser ◽  
Qian Huang ◽  
Nir Hacohen ◽  
Steven P. Lamontagne ◽  
Eduardo Guillen ◽  
...  
Keyword(s):  
Cell Differentiation ◽  
Dendritic Cell ◽  
Heat Shock ◽  
Fusion Protein ◽  
Cell Activation ◽  
Cd8 T Cell ◽  
T Cell Differentiation ◽  
Toll Like Receptor ◽  
Dendritic Cell Activation ◽  
Toll Like Receptor 4

scholarly journals Επικεκαλυμμένες ενδαγγειακές προθέσεις και επαναστένωση μετά από αγγειοπλαστική

2014 ◽  
Author(s):  
Δημήτριος Λυσίτσας
Keyword(s):  
Heat Shock ◽  
Heat Shock Protein ◽  
Heat Shock Protein 70 ◽  
Low Dose ◽  
High Dose ◽  
Hsp 70

Εισαγωγή: Η υπερπλασία του έσω χιτώνα παίζει μείζων ρόλο στην επαναστένωση (in-stentrestenosis). Στην παρούσα μελέτη αξιολογήσαμε in vitro την επίδραση της D-24851(κυτταροτοξική ουσία που σταματά τον κυτταρικό κύκλο στο στάδιο G2-M) στονπολλαπλασιασμό των λείων μυϊκών κυττάρων και μελετήσαμε την ασφάλεια και τηνδραστικότητα μίας ενδαγγειακής πρόθεσης (stent) επικαλυμμένης με πολυμερή ουσία πουαπελευθερώνει την D-24851, στην αναστολή της υπερπλασίας του έσω χιτώνα χωρίς ναεμποδίζει την αναγεννητική ικανότητα του ενδοθηλίου σε in vivo πειραματικό μοντέλο.Υλικό και Μέθοδοι: Γυμνά μεταλλικά stent (n=6), stent επικαλυμμένα μόνο με πολυμερήουσία (polymer-coated, n=7) και stent επικαλυμμένα με πολυμερή ουσία πουαπελευθερώνουν 31±1μg (low-dose, n=7), 216±8 μg (high-dose, n=6) ή 1774±39 μg(extreme-dose, n=5) της D-24851 εμφυτεύτηκαν στις μηριαίες αρτηρίες λευκών New Zealandκουνελιών. Τα πειραματόζωα θυσιάστηκαν στις 28 ημέρες για ιστομορφομετρική ανάλυση.Για την αξιολόγηση της ενδοθηλιακής αναγέννησης στις 90 ημέρες, 12 πειραματόζωαχρησιμοποιήθηκαν για την τοποθέτηση polymer-coated (n=3), low dose (n=3), high dose(n=3) or extreme dose (n=3) ενδαγγειακών προθέσεων.Αποτελέσματα: In vitro η D-24851 αναστέλλει την υπερπλασία των λείων μυϊκών κυττάρωνκαι επάγει την απόπτωση τους χωρίς να αυξάνει την επαγωγή της heat shock protein 70(HSP-70), μία κυτταροπροστατευτική και αντι-αποπτωτική πρωτεΐνη. Η θεραπεία με lowdoseD-24851 stents συνδυάστηκε με 38% (P=0.029) μείωση της υπερπλαστικής περιοχήςτου έσω χιτώνα και 35% (P=0.003) μείωση της επι τοις εκατό στένωσης του αυλού σεσύγκριση με τα γυμνά μεταλλικά stents. Ο τραυματισμός και η φλεγμονή του αρτηριακού τοιχώματος δεν παρουσίασαν σημαντικές διαφορές μεταξύ των ομάδων. Τα επικαλυμμέναμόνο με πολυμερή ουσία stents εμφάνισαν παρόμοια ανάπτυξη νεοιστού σε σύγκριση με ταγυμνά μεταλλικά stents. Ωστόσο, όλες οι ομάδες των stents με D-24851 παρουσίασαν ατελήενδοθηλιοποίηση συγκρινόμενα με τα polymer-coated stents.Συμπεράσματα: Οι επικεκαλυμμένες ενδαγγειακές προσθέσεις με πολυμερή ουσία καιχαμηλη δόση D-24851 μειώνουν σημαντικά την υπερπλασιά του έσω χιτώνα. Λόγω τηςατελούς ενδοθηλιοποίησης, μακράς διάρκειας μελέτες είναι απαραίτητες για ναπιστοποιήσουν ότι η αναστολή του νεοιστού παραμένει και μετά τις 28 ημέρες.

scholarly journals Overexpression of Mitochondrial Hsp70/Hsp75 Protects Astrocytes against Ischemic Injury in vitro

2007 ◽  
Vol 28 (5) ◽  
pp. 1009-1016 ◽  
Author(s):  
Ludmila A Voloboueva ◽  
Melissa Duan ◽  
YiBing Ouyang ◽  
John F Emery ◽  
Christian Stoy ◽  
...  
Keyword(s):  
Membrane Potential ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Mitochondrial Membrane Potential ◽  
Heat Shock Protein 70 ◽  
Mitochondrial Membrane ◽  
Ischemic Injury ◽  
Glucose Deprivation ◽  
Hsp70 Family

Mitochondrial heat shock protein 70 (mtHsp70/Hsp75/Grp75/mortalin/TRAP-1/PBP74) is an essential mitochondrial chaperone and a member of the heat shock protein 70 (HSP70) family. Although many studies have shown the protective properties of overexpression of the cytosolic inducible member of the HSP70 family, Hsp72, few studies have investigated the protective potential of Hsp75 against ischemic injury. Mitochondria are one of the primary targets of ischemic injury in astrocytes. In this study, we analyzed the effects of Hsp75 overexpression on cellular levels of reactive oxygen species (ROS), mitochondrial membrane potential, ATP levels, and viability during the ischemia-like conditions of oxygen-glucose deprivation (OGD) or glucose deprivation (GD) in primary astrocytic cultures. We show that Hsp75 overexpression decreases ROS production and preserves mitochondrial membrane potential during GD, and preserves ATP levels and cell viability during OGD. These findings indicate that Hsp75 can provide protection against ischemia-like in vitro injury and suggest that it should be further studied as a potential candidate for protection against ischemic injury.

Differential Neuroprotection from Human Heat Shock Protein 70 Overexpression in in Vitro and in Vivo Models of Ischemia and Ischemia-like Conditions

2001 ◽  
Vol 170 (1) ◽  
pp. 129-139 ◽  
Author(s):  
Jong Eun Lee ◽  
Midori A. Yenari ◽  
Guo Hua Sun ◽  
Lijun Xu ◽  
Michelle R. Emond ◽  
...  
Keyword(s):  
Heat Shock ◽  
Heat Shock Protein ◽  
Heat Shock Protein 70 ◽  
In Vivo Models ◽  
Human Heat Shock Protein
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