In Vitro Cultivation of the Exoerythrocytic Stage of Plasmodium Berghei in a Hepatoma Cell Line

1983 ◽  
Vol 32 (4) ◽  
pp. 682-684 ◽  
Author(s):  
Michael R. Hollingdale ◽  
Pamela Leland ◽  
Alan L. Schwartz
1984 ◽  
Vol 33 (5) ◽  
pp. 792-799 ◽  
Author(s):  
Masamichi Aikawa ◽  
Shigehiko Uni ◽  
Ruth Nussenzweig ◽  
Alan Schwartz ◽  
Michael Hollingdale

Parasitology ◽  
1993 ◽  
Vol 106 (1) ◽  
pp. 1-6 ◽  
Author(s):  
C. S. Davies ◽  
M. Pudney ◽  
J. C. Nicholas ◽  
R. E. Sinden

SUMMARYThe causal prophylactic activity of the novel hydroxynaphthoquinone, S66C80, was assessed against the exo-erythrocytic (EE) stages of Plasmodium berghei cultured in the human hepatoma cell line, HepG2. 566C80 was found to be highly active as an inhibitor of EE development and was more active than the established causal prophylactic pyrimethamine. A 566C80 concentration of 1·85 × 10−9 M, added 3 h after sporozoite invasion, reduced the numbers of EE forms visible at 48 h by 50%, while the equivalent concentration of pyrimethamine was 1·95 × 10−8 M.


1987 ◽  
Vol 6 (3) ◽  
pp. 675-680 ◽  
Author(s):  
C.M. Chang ◽  
K.S. Jeng ◽  
C.P. Hu ◽  
S.J. Lo ◽  
T.S. Su ◽  
...  

Pharmaceutics ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 362 ◽  
Author(s):  
Amélia M. Silva ◽  
Helen L. Alvarado ◽  
Guadalupe Abrego ◽  
Carlos Martins-Gomes ◽  
Maria L. Garduño-Ramirez ◽  
...  

Oleanolic (OA) and ursolic (UA) acids are recognized triterpenoids with anti-cancer properties, showing cell-specific activity that can be enhanced when loaded into polymeric nanoparticles. The cytotoxic activity of OA and UA was assessed by Alamar Blue assay in three different cell lines, i.e., HepG2 (Human hepatoma cell line), Caco-2 (Human epithelial colorectal adenocarcinoma cell line) and Y-79 (Human retinoblastoma cell line). The natural and synthetic mixtures of these compounds were tested as free and loaded in polymeric nanoparticles in a concentration range from 2 to 32 µmol/L. The highest tested concentrations of the free triterpene mixtures produced statistically significant cell viability reduction in HepG2 and Caco-2 cells, compared to the control (untreated cells). When loaded in the developed PLGA nanoparticles, no differences were recorded for the tested concentrations in the same cell lines. However, in the Y-79 cell line, a decrease on cell viability was observed when testing the lowest concentration of both free triterpene mixtures, and after their loading into PLGA nanoparticles.


1985 ◽  
Vol 34 (6) ◽  
pp. 1017-1021 ◽  
Author(s):  
Shigehiko Uni ◽  
Masamichi Aikawa ◽  
William E. Collins ◽  
Michael R. Hollingdale ◽  
Carlos C. Campbell

2002 ◽  
Vol 76 (15) ◽  
pp. 7736-7746 ◽  
Author(s):  
Amedeo De Tomassi ◽  
Maura Pizzuti ◽  
Rita Graziani ◽  
Andrea Sbardellati ◽  
Sergio Altamura ◽  
...  

ABSTRACT Tamarins (Saguinus species) infected by GB virus B (GBV-B) have recently been proposed as an acceptable surrogate model for hepatitis C virus (HCV) infection. The availability of infectious genomic molecular clones of both viruses will permit chimeric constructs to be tested for viability in animals. Studies in cells with parental and chimeric constructs would also be very useful for both basic research and drug discovery. For this purpose, a convenient host cell type supporting replication of in vitro-transcribed GBV-B RNA should be identified. We constructed a GBV-B subgenomic selectable replicon based on the sequence of a genomic molecular clone proved to sustain infection in tamarins. The corresponding in vitro-transcribed RNA was used to transfect the Huh7 human hepatoma cell line, and intracellular replication of transfected RNA was shown to occur, even though in a small percentage of transfected cells, giving rise to antibiotic-resistant clones. Sequence analysis of GBV-B RNA from some of those clones showed no adaptive mutations with respect to the input sequence, whereas the host cells sustained higher GBV-B RNA replication than the original Huh7 cells. The enhancement of replication depending on host cell was shown to be a feature common to the majority of clones selected. The replication of GBV-B subgenomic RNA was susceptible to inhibition by known inhibitors of HCV to a level similar to that of HCV subgenomic RNA.


Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3215
Author(s):  
Gulsim Kulsharova ◽  
Akbota Kurmangaliyeva ◽  
Elvira Darbayeva ◽  
Luis Rojas-Solórzano ◽  
Galiya Toxeitova

The drug development process can greatly benefit from liver-on-a-chip platforms aiming to recapitulate the physiology, mechanisms, and functionalities of liver cells in an in vitro environment. The liver is the most important organ in drug metabolism investigation. Here, we report the development of a hybrid cyclic olefin copolymer (COC) and polydimethylsiloxane (PDMS) microfluidic (HCP) platform to culture a Huh7 hepatoma cell line in dynamic conditions towards the development of a liver-on-a-chip system. The microfluidic platform is comprised of a COC bottom layer with a microchannel and PDMS-based flat top layer sandwiched together. The HCP device was applied for culturing Huh7 cells grown on a collagen-coated microchannel. A computational fluid dynamics modeling study was conducted for the HCP device design revealing the presence of air volume fraction in the chamber and methods for optimizing experimental handling of the device. The functionality and metabolic activity of perfusion culture were assessed by the secretion rates of albumin, urea, and cell viability visualization. The HCP device hepatic culture remained functional and intact for 24 h, as assessed by resulting levels of biomarkers similar to published studies on other in vitro and 2D cell models. The present results provide a proof-of-concept demonstration of the hybrid COC–PDMS microfluidic chip for successfully culturing a Huh7 hepatoma cell line, thus paving the path towards developing a liver-on-a-chip platform.


2001 ◽  
Vol 7 (5) ◽  
pp. 685 ◽  
Author(s):  
Zhi-Qiang Song ◽  
Fei Hao ◽  
Feng Min ◽  
Qiao-Yu Ma ◽  
Guo-Dong Liu

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