Category: Cancer

by Ludwig Maximilian University of Munich

Many chemotherapeutic agents used to treat cancers are associated with side-effects of varying severity, because they are toxic to normal cells as well as malignant tumors. This has motivated the search for effective alternatives to the synthetic pharmaceuticals with which most cancers are currently treated. The use of calcium phosphate and citrate for this purpose has been under discussion for some years now, since they lead to cell death when delivered directly into cells, while their presence in the circulation has little or no toxic effect. The problem consists in finding ways to overcome the mechanisms that control the uptake of these compounds into cells, and ensuring that the compounds act selectively on the cells one wishes to eliminate. Researchers in the Department of Chemistry at LMU, led by Dr. Constantin von Schirnding, Dr. Hanna Engelke and Prof. Thomas Bein, now report the development of a class of novel amorphous nanoparticles made up of calcium and citrate, which are capable of breaching the barriers to uptake, and killing tumor cells in a targeted fashion.

Continue reading… “Researchers develop novel nanoparticle that efficiently and selectively kills cancer cells”

By Good News Network – Nov 29, 2020

Researchers at Tel Aviv University have demonstrated that the CRISPR genome editing system is very effective in treating metastatic cancers, a significant step on the way to finding a cure for cancer.

In a paper published this week, the researchers demonstrated a novel lipid nanoparticle-based delivery system that specifically targets cancer cells—and co-author Prof. Dan Peer said it’s the first study in the world to prove that the CRISPR/Cas9 can be used to treat cancer effectively in a living animal. “It must be emphasized that this is not chemotherapy. There are no side effects, and a cancer cell treated in this way will never become active again,” said Peer, the VP for R&D and Head of the Laboratory of Precision Nanomedicine at the Shmunis School of Biomedicine and Cancer Research. “The CRISPR genome editing technology, capable of identifying and altering any genetic segment, has revolutionized our ability to disrupt, repair or even replace genes in a personalized manner.

”Peer’s team that includes researchers from an Iowa company, Integrated DNA Technologies, and Harvard Medical School, chose two of the deadliest cancers: glioblastoma and metastatic ovarian cancer to examine the system’s feasibility. Glioblastoma is the most aggressive type of brain cancer, with a life expectancy of 15 months after diagnosis and a five-year survival rate of only 3%.

The researchers demonstrated that a single treatment with CRISPR-LNPs doubled the average life expectancy of mice with glioblastoma tumors, improving their overall survival rate by about 30%.Ovarian cancer is a major cause of death among women and the most lethal cancer of the female reproductive system. Despite progress in recent years, only a third of the patients survive this disease—but treatment with CRISPR-LNPs in mice with metastatic ovarian cancer boosted the overall survival rate of by a whopping 80%.

“Despite its extensive use in research, clinical implementation is still in its infancy because an effective delivery system is needed to safely and accurately deliver the CRISPR to its target cells,” Peer told Tel Aviv Universitynews. “The delivery system we developed targets the DNA responsible for the cancer cells’ survival. This is an innovative treatment for aggressive cancers that have no effective treatments today.”

Continue reading… “Revolutionary CRISPR-based Genome Editing System Destroys Cancer Cells ‘Permanently’ in Lab”