scholarly journals Metformin Increases Sensitivity of Melanoma Cells to Cisplatin by Blocking Exosomal-Mediated miR-34a Secretion

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Lan Ge ◽  
Yaguang Wu ◽  
Ming Wan ◽  
Yi You ◽  
Zhifang Zhai ◽  
...  
Keyword(s):  
Malignant Melanoma ◽  
Cell Line ◽  
Melanoma Cell Line ◽  
Therapeutic Strategy ◽  
Cisplatin Resistance ◽  
Melanoma Cells ◽  
Different Types ◽  
Low Efficiency ◽  
First Time ◽  
A375 Cells

Melanoma, also known as malignant melanoma, is a type of cancer derived from the pigment-containing cells known as melanocytes. Cisplatin (CDDP) is widely used in the treatment of different types of tumors with high response rates, but it generally has low efficiency in melanoma. This study aimed to investigate whether metformin could sensitize the melanoma cell line A375 to cisplatin. Our results for the first time indicated that CDDP increased the miR-34a secretion by exosomes in melanoma A375 cells, which was, at least partially, related to the cisplatin resistance of melanoma cells. Moreover, metformin significantly sensitized A375 cells to cisplatin. Mechanistically, metformin significantly blocked the exosome-mediated miR-34a secretion induced by cisplatin. Our study not only reveals a novel mechanism that exosomal secretion of miR-34a is involved in the cisplatin resistance of melanoma cells but also provides a promising therapeutic strategy by synergistic addition of metformin.

scholarly journals In Vitro Anticancer Potential of Jasione montana and Its Main Components Against Human Amelanotic Melanoma Cells

2021 ◽  
Vol 22 (7) ◽  
pp. 3345
Author(s):  
Aleksandra Maria Juszczak ◽  
Robert Czarnomysy ◽  
Jakub Władysław Strawa ◽  
Marijana Zovko Končić ◽  
Krzysztof Bielawski ◽  
...  
Keyword(s):  
Cell Line ◽  
Melanoma Cell ◽  
Melanoma Cell Line ◽  
Binding Assay ◽  
Annexin V ◽  
Melanoma Cells ◽  
Amelanotic Melanoma ◽  
Cytotoxic Activities ◽  
Ionization Mass ◽  
Caspase 9

Jasione montana L. (Campanulaceae) is used in traditional Belarusian herbal medicine for sleep disorders in children, but the chemical composition and biological activity have not been investigated. In this study, the activities of J. montana extracts, their fractions and main compounds were evaluated in amelanotic melanoma C32 (CRL-1585) cells and normal fibroblasts (PCS-201-012). The extracts and fractions were analyzed using liquid chromatography–photodiode array detection–electrospray ionization–mass spectrometry (LC–PDA–ESI–MS/TOF) to characterize 25 compounds. Further, three major and known constituents, luteolin (22) and its derivatives such as 7-O-glucoside (12) and 7-O-sambubioside (9) were isolated and identified. The cytotoxic activities against fibroblasts and the amelanotic melanoma cell line were determined using the fixable viability stain (FVS) assay. The influence of diethyl ether (Et2O) fraction (JM4) and 22 on apoptosis induction was investigated using an annexin V binding assay. The obtained results showed significant cytotoxicity of JM4 and 22 with IC50 values of 119.7 ± 3.2 and 95.1 ± 7.2 μg/mL, respectively. The proapoptotic potential after 22 treatment in the C32 human amelanotic melanoma cell line was comparable to that of vinblastine sulfate (VLB), detecting 29.2 ± 3.0% apoptotic cells. Moreover, 22 displayed less necrotic potential against melanoma cells than VLB. In addition, the influences of JM4 and 22 on the dysfunction of the mitochondrial membrane potential (MMP), cell cycle and activity of caspases 3, 8, 9, and 10 were established. The effects of JM4 on MMP change (74.5 ± 3.0% of the cells showed a reduced MMP) corresponded to the results obtained from the annexin V binding assay and activation of caspase-9. JM4 and 22 displayed a significant impact on caspase-9 (40.9 ± 2.4% of the cells contained active caspase-9 after JM4 treatment and 16.6 ± 0.8% after incubation with 22) and the intrinsic (mitochondrial) apoptotic pathway. Moreover, studies have shown that JM4 and 22 affect the activation of external apoptosis pathways by inducing the caspase-8 and caspase-10 cascades. Thus, activation of caspase-3 and DNA damage via external and internal apoptotic pathways were observed after treatment with JM4 and 22. The obtained results suggest that J. montana extracts could be developed as new topical preparations with potential anticancer properties due to their promising cytotoxic and proapoptotic potential.

scholarly journals A Novel Fast Photothermal Therapy Using Hot Spots of Gold Nanorods for Malignant Melanoma Cells

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 880 ◽  
Author(s):  
Yanhua Yao ◽  
Nannan Zhang ◽  
Xiao Liu ◽  
Qiaofeng Dai ◽  
Haiying Liu ◽  
...  
Keyword(s):  
Cell Death ◽  
Malignant Melanoma ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Photothermal Therapy ◽  
Treatment Time ◽  
High Energy ◽  
Melanoma Cells ◽  
Photothermal Effect ◽  
A375 Cells

In this paper, the plasmon resonance effects of gold nanorods was used to achieve rapid photothermal therapy for malignant melanoma cells (A375 cells). After incubation with A375 cells for 24 h, gold nanorods were taken up by the cells and gold nanorod clusters were formed naturally in the organelles of A375 cells. After analyzing the angle and space between the nanorods in clusters, a series of numerical simulations were performed and the results show that the plasmon resonance coupling between the gold nanorods can lead to a field enhancement of up to 60 times. Such high energy localization causes the temperature around the nanorods to rise rapidly and induce cell death. In this treatment, a laser as low as 9.3 mW was used to irradiate a single cell for 20 s and the cell died two h later. The cell death time can also be controlled by changing the power of laser which is focused on the cells. The advantage of this therapy is low laser treatment power, short treatment time, and small treatment range. As a result, the damage of the normal tissue by the photothermal effect can be greatly avoided.

scholarly journals The Induction of Apoptosis in A375 Malignant Melanoma Cells bySutherlandia frutescens

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Nicola B. van der Walt ◽  
Zahra Zakeri ◽  
Marianne J. Cronjé
Keyword(s):  
Malignant Melanoma ◽  
Basic Mechanism ◽  
Melanoma Cells ◽  
Caspase Activation ◽  
Nuclear Condensation ◽  
Induced Apoptosis ◽  
Apoptosis Inducing Factor ◽  
A375 Melanoma Cell Line ◽  
A375 Cells

Sutherlandia frutescensis a medicinal plant indigenous to Southern Africa and is commonly known as the “cancer bush.” This plant has traditionally been used for the treatment of various ailments, although it is best known for its claims of activity against “internal” cancers. Here we report on its effect on melanoma cells. The aim of this study was to investigate whether an extract ofS. frutescenscould induce apoptosis in the A375 melanoma cell line and to outline the basic mechanism of action.S. frutescensextract induced apoptosis in A375 cells as evidenced by morphological features of apoptosis, phosphatidylserine exposure, nuclear condensation, caspase activation, and the release of cytochromecfrom the mitochondria. Studies in the presence of a pan-caspase inhibitor allude to caspase-independent cell death, which appeared to be mediated by the apoptosis inducing factor. Taken together, the results of this study show thatS. frutescensextract is effective in inducing apoptosis in malignant melanoma cells and indicates that furtherin vivomechanistic studies may be warranted.

A novel transforming gene in a human malignant melanoma cell line

Nature ◽  
1984 ◽  
Vol 311 (5987) ◽  
pp. 671-673 ◽  
Author(s):  
R. A. Padua ◽  
N. Barrass ◽  
G. A. Currie
Keyword(s):  
Malignant Melanoma ◽  
Cell Line ◽  
Melanoma Cell ◽  
Melanoma Cell Line ◽  
Human Malignant Melanoma ◽  
Malignant Melanoma Cell ◽  
Transforming Gene

scholarly journals Efficient isolation of human metapneumovirus using MNT-1, a human malignant melanoma cell line with early and distinct cytopathic effects

2017 ◽  
Vol 61 (11) ◽  
pp. 497-506 ◽  
Author(s):  
Ko Sato ◽  
Oshi Watanabe ◽  
Suguru Ohmiya ◽  
Fumiko Chiba ◽  
Akira Suzuki ◽  
...  
Keyword(s):  
Malignant Melanoma ◽  
Cell Line ◽  
Melanoma Cell ◽  
Melanoma Cell Line ◽  
Human Metapneumovirus ◽  
Human Malignant Melanoma ◽  
Malignant Melanoma Cell ◽  
Cytopathic Effects

Establishment and Characterization of a Malignant Melanoma Cell Line (YP-MEL) Derived from a Patient with Neurocutaneous Melanosis

1994 ◽  
Vol 190 (2) ◽  
pp. 178-185 ◽  
Author(s):  
Y. Nagashima ◽  
Y. Miyagi ◽  
I. Aoki ◽  
T. Funabiki ◽  
K. Ikuta ◽  
...  
Keyword(s):  
Malignant Melanoma ◽  
Cell Line ◽  
Melanoma Cell ◽  
Melanoma Cell Line ◽  
Neurocutaneous Melanosis ◽  
Malignant Melanoma Cell
Sign in / Sign up

Export Citation Format

Share Document