scholarly journals Magnetic Fields Trump Oxygen in Controlling the Death of Erythro-Leukemia Cells

2019 ◽  
Vol 9 (24) ◽  
pp. 5318
Author(s):  
Ying Li ◽  
Paul Héroux
Keyword(s):  
Cell Death ◽  
Magnetic Fields ◽  
Cancer Cells ◽  
Human Cancer ◽  
Neurological Diseases ◽  
Zero Field ◽  
Electromagnetic Environment ◽  
Human Environment ◽  
Human Cancer Cells

Expansions in power and telecommunications systems have created a new electromagnetic environment. Here, we compare the death rate of human cancer cells in vitro in the pre-industrial electromagnetic environment of the past (“Zero Field”) with that of an electromagnetic environment typical of contemporary human exposures (“Incubator Field”). A cell incubator provides magnetic fields comparable to those in the current human environment. Steel shields divert those same fields away from cell preparations in the “pre-industrial” assays. Large changes in oxygen levels are provided by nitrogen or atmospheric gas over the cell cultures. Human cancer cells are then separated according to three categories: necrotic, early apoptotic, or late apoptotic. The results are compiled for two variables, magnetic field and oxygen, in 16 different situations (“Transitions”) likely to occur in the human body under present living conditions. We find that magnetic fields are a more powerful determinant of cell death than oxygen, and induce death by different mechanisms. This has important implications for the reproducibility of in vitro biological experiments focusing on cell survival or metabolism, and for public health. The rate and mechanisms of cell death are critical to many chronic human ailments such as cancer, neurological diseases, and diabetes.

scholarly journals Inducing oncolytic cell death in human cancer cells by the long non-coding RNA let-A

2021 ◽  
Author(s):  
Tosca Birbaumer ◽  
Tommy Beat Schlumpf ◽  
Makiko Seimiya ◽  
Yanrui Jiang ◽  
Renato Paro
Keyword(s):  
Cell Death ◽  
Cancer Cells ◽  
Cell Lines ◽  
Human Cancer ◽  
Ectopic Expression ◽  
In Vitro Transcription ◽  
Human Cancer Cell Lines ◽  
Human Cancer Cells ◽  
Non Coding Rna

Long non-coding (lnc) RNAs contain functional elements that play important regulatory roles in a variety of processes during development, normal physiology, as well as disease. We recently discovered a new lncRNA, we named let-A, expressed from the evolutionary conserved let-7-Complex locus in Drosophila. This RNA induces cell death in Drosophila cancer cells. Here we show that ectopic expression of Drosophila let-A is also exerting an oncolytic toxicity in several human cancer cell lines, but shows almost no effect in more differentiated or cell lines derived from normal tissue. We demonstrate that let-A RNA prepared by in vitro transcription and provided in the growth medium is sufficient to induce cell death both in human and Drosophila cancer cells. The activity of in vitro transcribed let-A is most efficient in its full length, but requires prior modification/processing to become active. let-A induces a reduction of nucleolar size in treated cells. We show exo/endocytosis and Toll signaling pathway to be necessary for let-A-induced toxicity. Our findings indicate let-A exhibits an evolutionary conserved anti-cancer function, making it a promising molecule for tumor treatments.

scholarly journals Evaluation of the Efficacy & Biochemical Mechanism of Cell Death Induction by Piper longum Extract Selectively in In-Vitro and In-Vivo Models of Human Cancer Cells

PLoS ONE ◽  
2014 ◽  
Vol 9 (11) ◽  
pp. e113250 ◽  
Author(s):  
Pamela Ovadje ◽  
Dennis Ma ◽  
Phillip Tremblay ◽  
Alessia Roma ◽  
Matthew Steckle ◽  
...  
Keyword(s):  
Cell Death ◽  
Cancer Cells ◽  
Human Cancer ◽  
Biochemical Mechanism ◽  
In Vivo Models ◽  
Piper Longum ◽  
Human Cancer Cells

scholarly journals A New Smoothened Antagonist Bearing the Purine Scaffold Shows Antitumour Activity In Vitro and In Vivo

2021 ◽  
Vol 22 (16) ◽  
pp. 8372
Author(s):  
Ana María Zárate ◽  
Christian Espinosa-Bustos ◽  
Simón Guerrero ◽  
Angélica Fierro ◽  
Felipe Oyarzún-Ampuero ◽  
...  
Keyword(s):  
Cancer Cells ◽  
Human Cancer ◽  
Antitumour Activity ◽  
Anticancer Compounds ◽  
Human Cancer Cells ◽  
Cycle Arrest ◽  
Apoptosis Inducer ◽  
Purine Ring

The Smoothened (SMO) receptor is the most druggable target in the Hedgehog (HH) pathway for anticancer compounds. However, SMO antagonists such as vismodegib rapidly develop drug resistance. In this study, new SMO antagonists having the versatile purine ring as a scaffold were designed, synthesised, and biologically tested to provide an insight to their mechanism of action. Compound 4s was the most active and the best inhibitor of cell growth and selectively cytotoxic to cancer cells. 4s induced cell cycle arrest, apoptosis, a reduction in colony formation and downregulation of PTCH and GLI1 expression. BODIPY-cyclopamine displacement assays confirmed 4s is a SMO antagonist. In vivo, 4s strongly inhibited tumour relapse and metastasis of melanoma cells in mice. In vitro, 4s was more efficient than vismodegib to induce apoptosis in human cancer cells and that might be attributed to its dual ability to function as a SMO antagonist and apoptosis inducer.

Rhodium(i) N-heterocyclic carbene complexes: synthesis and cytotoxic properties

2021 ◽  
Vol 45 (11) ◽  
pp. 5176-5183
Author(s):  
Ichraf Slimani ◽  
Serap Şahin-Bölükbaşı ◽  
Mustafa Ulu ◽  
Enes Evren ◽  
Nevin Gürbüz ◽  
...  
Keyword(s):  
Cancer Cells ◽  
Mtt Assay ◽  
Incubation Time ◽  
Human Cancer ◽  
Cytotoxic Activities ◽  
Carbene Complexes ◽  
Human Cancer Cells ◽  
Benzimidazolium Salts ◽  
Ht 29

A series of benzimidazolium salts and their [RhCl(NHC)(COD)] complexes were synthesized. All compounds were screened for in vitro cytotoxic activities against a panel of human cancer cells (HT-29 colon, Ishikawa endometrial, U-87 glioblastoma) using the MTT assay for 48 h incubation time.

Treatment of human cancer cells with selenite or tellurite in combination with auranofin enhances cell death due to redox shift

2009 ◽  
Vol 47 (6) ◽  
pp. 710-721 ◽  
Author(s):  
Maria Pia Rigobello ◽  
Valentina Gandin ◽  
Alessandra Folda ◽  
Anna-Klara Rundlöf ◽  
Aristi P. Fernandes ◽  
...  
Keyword(s):  
Cell Death ◽  
Cancer Cells ◽  
Human Cancer ◽  
Human Cancer Cells

Multicomponent 5-fluorouracil loaded PAMAM stabilized-silver nanocomposites synergistically induce apoptosis in human cancer cells

2015 ◽  
Vol 3 (3) ◽  
pp. 457-468 ◽  
Author(s):  
Ishita Matai ◽  
Abhay Sachdev ◽  
P. Gopinath
Keyword(s):  
Cancer Therapy ◽  
Cancer Cells ◽  
Therapeutic Agent ◽  
Human Cancer ◽  
Pamam Dendrimer ◽  
Human Cancer Cells ◽  
Silver Nanocomposites

Herein, we report the development of a poly(amidoamine) (PAMAM) dendrimer based multicomponent therapeutic agent forin vitrocancer therapy applications.

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