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Destroying Cancer at the Speed of Light®

Clinical Study Underway (68 of 100 Patients Treated)
Expected to complete enrollment at the end of 2024
Expected to complete study at the end of 2026


Bullboard - Investor Discussion Forum Theralase Technologies Inc. V.TLT

Alternate Symbol(s):  V.TLT.WT | TLTFF

Theralase Technologies Inc. is a Canada-based clinical-stage pharmaceutical company. The Company is engaged in the research and development of light activated compounds and their associated drug formulations. The Company operates through two divisions: Anti-Cancer Therapy (ACT) and Cool Laser Therapy (CLT). The Anti-Cancer Therapy division develops patented, and patent pending drugs, called... see more

TSXV:TLT - Post Discussion

Theralase Technologies Inc. > Liver Cancer Research
View:
Post by 99942Apophis on Feb 05, 2021 5:35pm

Liver Cancer Research

Don't know if this has been posted.

A bis-indazolic ruthenium(II) complex: Reactivity and biological studies on cancer cells


Highlights

 

Metal complexes exhibited anticancer activity against different tumor cell lines.

Suitable induction and selective cytotoxicity to cancer cell lines.

DNA fragmentation is a biological effect of the metal complex in HepG2 cells.

Cell death promoted by the bis-indazolic metal complex caused by apoptosis in HepG2 cells.

 

Abstract

Ru(II)-based complexes have been widely investigated as potential anticancer agents, leading cell death of tumor mass. In this work, a metal complex, cis-[RuII(Hind)2(bpy)2](PF6)2 (Hind = indazole and bpy = 2,2′-bipyridine), was synthesized and characterized by elemental analysis, spectroscopy and electrochemistry methods, validating its formulation. This complex can act as a Brnsted-Lowry acid with pKa close to physiological pH. Photosubstitution reaction was noticed upon blue light irradiation with release of indazol molecules in acetonitrile, a behavior also noticed, indicating its photosensitivity. This metal complex was screened in vitro against distinct human cancer cell lines. Hepatocellular carcinoma cells (HepG2) were the most sensitive, with the half maximal inhibitory concentration (IC50) at 7.2 µmol L−1. Further biological studies showed DNA fragmentation induced by this compound, which resulted in cell cycle arrest in S phase and HepG2 cell death by apoptosis. Moreover, there was no significant cytotoxicity against healthy human pulmonary fibroblast cells (MRC-5), and therefore the compound exhibited a high selectivity index, indeed a better in vitro anticancer profile than some structurally related compounds (e.g. NAMI-A and KP1039). Our results indicate exciting potential pharmacological applications of this metal complex in liver cancer treatment, which might be supported by further studies.

Graphical abstract

A new KP1339 analogue ruthenium complex, cis-[Ru(Hind)2(bpy)2](PF6)2, showed expressive cytotoxicity against liver cancer cells, HepG2, causing DNA fragmentation, interrupting the cell cycle in phase S and resulting in cell death by apoptosis.

 

 

Abbreviations

B16-F10
murine melanoma
bpy
2,2′-bipyridine
CDDP
cisplatin
COSY
homonuclear correlation spectroscopy
DFT
density functional theory
DMF
dimethylformamide
DMSO
dimethyl sulfoxide
DMSOd6
deutered dimethyl sulfoxide
DNA
deoxyribonucleic acid
Egap
electronic gap
Fc
ferrocene
FOR000
cis-[RuCl2(bpy)2]
FOR002
cis-[RuCl(indazole)(bpy)2]PF6
FOR0D2
cis-[Ru(indazole)2(bpy)2](PF6)2
HCT116
human colon carcinoma
HepG2
hepatocellular carcinoma cells
Him
imidazole
Hind
indazole
HOMO
highest occupied molecular orbital
IC50
inhibitory concentration 50%
IL
intraligand
INCA
National Cancer Institute of Brazil
KP1019
(H2ind)[trans-RuCl4(Hind)2]
KP1339
Na[trans-RuCl4(Hind)2]
LED
light emitting diode
LLCT
ligand-to-ligand charge transfer
LUMO
lowest unoccupied molecular orbital
MLCT
metal-to-ligand charge transfer
MRC-5
pulmonary fibroblast cells
NAMI-A
(H2im)[trans-RuCl4(S-DMSO)(Him)]
PTBA
tetrabutylammonium perchlorate
SI
selectivity index
TACE
transarterial chemoembolization
TD-DFT
time-dependent density functional theory
TLD 1443
[Ru(4,4′-dimethyl-2,2′-bipyridine)2(2-(2′,2″:5″,2′′′-terthiophene)-imidazo[4,5-f][1,10]phenanthroline)]2+
λmax
band of electronic absorption spectroscopy
Comment by tamarindo1 on Feb 05, 2021 6:26pm
Ruthenium as used in the chemical industry and as a synthesis in various organic chemicals in the pharmaceutical industry, in addition its replacement of mercury in various membrane technologies is creating a growing demand for this extremely rare metal compound causing a high CAGR. I did not know this. 
Comment by Johnandrose22 on Feb 05, 2021 7:17pm
Now we’re discussing the possible use of TLT compounds to combat liver cancer...remarkable...while the company that owns these compounds is valued at @ $.20....remarkable.
Comment by robertshaw on Feb 05, 2021 9:17pm
Blowjobjoe's bosses short us every f?cking day, also remarkable.
Comment by Jaro1977 on Feb 05, 2021 10:03pm
robertshaw, I was not around 6-7 years ago.  How is this "joe" and who are his bossess? Thanks
Comment by Jaro1977 on Feb 05, 2021 10:04pm
robertshaw, I meant who is "joe"? Thanks,
Comment by robertshaw on Feb 06, 2021 6:08pm
Blowjobjoe is a guy same as southtiertom, who got paid 50 cents Per post by his boss (anonymous1), to bash this technology and praise the idiot (former CEO rogers dumbling White for his stupid decisions made in the past 6 years ).
Comment by robertshaw on Feb 06, 2021 6:11pm
All the royal long shareholders know Blowjobjoe worked 24x7... He was sued by RDW in Ontario's Court, and quit spreading rumors thereafter
Comment by Jaro1977 on Feb 06, 2021 6:52pm
thanks for your reply.  I understand now.
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Address:
41 Hollinger Road
Toronto, ON M4B 3G4
Canada

Toll Free:
1-866-THE-LASE (843-5273)
Local Phone:
416-699-LASE (5273)

Email:
info@theralase.com

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