Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Nanotherapy: the controlled delivery of chemotherapeutics to fight cancer stem cells

Abstract:
Chemotherapy is one of the most used cancer treatments, however, its side effects place it far from the ideal treatment. IMDEA Nanociencia scientists work to improve the effectiveness of chemotherapy using gold nanoparticles as vehicles to administer drugs only where it is needed. Specifically, they have used the combination of two drugs simultaneously on gold nanoparticles that have given good results in the reduction of breast cancer cells. These materials could be the basis of a "Trojan horse" strategy to effectively release chemotherapy within tumors.

Nanotherapy: the controlled delivery of chemotherapeutics to fight cancer stem cells

Madrid, Spain | Posted on September 6th, 2019

Chemotherapy is one of the most used treatments against cancer, together with surgery and radiotherapy. In a chemotherapy treatment, one or several drugs are administered to the patient to remove or damage cancer cells. Nevertheless, the treatment has several drawbacks that are hard to overcome, particularly the side effects. In this case, the inherent toxicity of the drugs employed causes a variety of symptoms including, weakness, nausea and hair loss, placing chemotherapy far from the ideal approach.

In this regard, scientists are trying to improve the efficacy and specificity of chemotherapy using carriers to deliver the drugs only where it is needed. Those based on gold nanostructures are excellent candidates for this objective because of their excellent stability, absence of toxicity and ease of modification with several chemical agents. Furthermore, some gold nanostructures, such as nanoclusters, are fluorescent allowing their use simultaneously for biotracking and imaging purposes.

The group of NanoBiotechnology at IMDEA Nanociencia, led by Prof. Álvaro Somoza, has used gold nanoclusters coated with albumin to facilitate the attachment of two active molecules for the treatment of breast cancer. Particularly, they have used doxorubicin (D), a chemotherapeutic agent that intercalates in the DNA causing cell death, and camptothecin analog SN38 (S), a potent topoisomerase I inhibitor. The modified nanostructures were tested in vitro against breast cancer cells, where the release of chemotherapeutics took place in a controlled manner. Remarkably, the nanotherapy was able to reduce the size and number of mammospheres, a cancer stem cell model. This type of cells present higher resistence to chemotherapy and are responsible for relapses and chemoresistance. What is more, the system combining both drugs presented excellent antitumor activity in different cancer models, thus confirming its promising nanotherapeutic potential.

This is the first time than albumin-stabilized gold nanoclusters have been used to deliver more than one drug, with excellent antitumoral activity, in cancer and cancer stem cells. “Our bifunctional nanostructure could be an excellent solution to overcome the solubility and biodistribution problems of different drugs”, Somoza says. These nanomaterials could be the basis of a Trojan-horse strategy to get the chemotherapeutics effectively inside the tumours. The gold nanoclusters act as the vehicles for carrying the drugs where is needed and release them upon internal stimuli. Whereas chemotherapy research is developing new drugs for cancer treatment, emerging nanotherapies are about building smart vehicles for existing drugs, reducing costs and improving the efficiency of the treatments.

This work is a collaboration between research groups at IMDEA Nanociencia, the Autonomous University of Madrid and the Center for Biological Research (CIB-CSIC). It has been partially funded by the Spanish Ministry for Science, Innovation and Universities, the Regional Government of Comunidad de Madrid, the Spanish Association Against Cancer and the Centre of Excellence Severo Ochoa recognition to IMDEA Nanociencia (2017-2021).

####

For more information, please click here

Contacts:
IMDEA Nanociencia
C/Faraday 9
28049 Madrid, Spain
Tel.: +34 91 299 87 12
www.nanociencia.imdea.org
Twitter: @IMDEA_Nano
Facebook: @IMDEANanociencia
Youtube: IMDEA Nanociencia

Copyright © IMDEA Nanociencia

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Growing carbon nanotubes with the right twist: Researchers synthetize nanotubes with a specific structure expanding previous theories on carbon nanotube growth December 13th, 2019

Better studying superconductivity in single-layer graphene| An existing technique is better suited to describing superconductivity in pure, single-layer graphene than current methods December 13th, 2019

Tiny magnetic particles enable new material to bend, twist, and grab December 13th, 2019

New laser technique images quantum world in a trillionth of a second: Technique captures a process that commonly causes electrical resistance in materials while, in others, can cause the absence of resistance, or superconductivity December 13th, 2019

Cancer

Nanotech being used in the fight against cancer November 27th, 2019

Nanoparticle orientation offers a way to enhance drug delivery: Coating particles with 'right-handed' molecules could help them penetrate cancer cells more easily November 5th, 2019

New drug-delivery technology promises efficient, targeted cancer treatment October 22nd, 2019

Novel nanogels hold promise for improved drug delivery to cancer patients: 'Precision Medicine' approach underpins UT Austin engineers' development of multifunctional nanogel September 27th, 2019

Possible Futures

Growing carbon nanotubes with the right twist: Researchers synthetize nanotubes with a specific structure expanding previous theories on carbon nanotube growth December 13th, 2019

Better studying superconductivity in single-layer graphene| An existing technique is better suited to describing superconductivity in pure, single-layer graphene than current methods December 13th, 2019

Tiny magnetic particles enable new material to bend, twist, and grab December 13th, 2019

New laser technique images quantum world in a trillionth of a second: Technique captures a process that commonly causes electrical resistance in materials while, in others, can cause the absence of resistance, or superconductivity December 13th, 2019

Nanomedicine

Arrowhead Pharmaceuticals Closes Underwritten Public Offering with Gross Proceeds of $266.8 Million December 7th, 2019

Artificial cells act more like the real thing December 6th, 2019

Arrowhead Pharmaceuticals Announces Pricing of Underwritten Public Offering of Common Stock December 5th, 2019

Arrowhead Pharmaceuticals Announces Proposed Underwritten Offering of Common Stock December 3rd, 2019

Discoveries

Growing carbon nanotubes with the right twist: Researchers synthetize nanotubes with a specific structure expanding previous theories on carbon nanotube growth December 13th, 2019

Better studying superconductivity in single-layer graphene| An existing technique is better suited to describing superconductivity in pure, single-layer graphene than current methods December 13th, 2019

New laser technique images quantum world in a trillionth of a second: Technique captures a process that commonly causes electrical resistance in materials while, in others, can cause the absence of resistance, or superconductivity December 13th, 2019

CEA-Leti and Partners Demo Potentially Scalable Readout System for Large Arrays of Quantum Dots: Results Hold promise for Fast, Accurate Single-Shot Readout ‘Of Foundry-Compatible Si MOS Spin Qubits’ December 12th, 2019

Announcements

Growing carbon nanotubes with the right twist: Researchers synthetize nanotubes with a specific structure expanding previous theories on carbon nanotube growth December 13th, 2019

Better studying superconductivity in single-layer graphene| An existing technique is better suited to describing superconductivity in pure, single-layer graphene than current methods December 13th, 2019

Tiny magnetic particles enable new material to bend, twist, and grab December 13th, 2019

New laser technique images quantum world in a trillionth of a second: Technique captures a process that commonly causes electrical resistance in materials while, in others, can cause the absence of resistance, or superconductivity December 13th, 2019

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Growing carbon nanotubes with the right twist: Researchers synthetize nanotubes with a specific structure expanding previous theories on carbon nanotube growth December 13th, 2019

Better studying superconductivity in single-layer graphene| An existing technique is better suited to describing superconductivity in pure, single-layer graphene than current methods December 13th, 2019

New laser technique images quantum world in a trillionth of a second: Technique captures a process that commonly causes electrical resistance in materials while, in others, can cause the absence of resistance, or superconductivity December 13th, 2019

How to induce magnetism in graphene: Elusive molecule predicted in the 1970s finally synthesized December 11th, 2019

Nanobiotechnology

Arrowhead Pharmaceuticals Closes Underwritten Public Offering with Gross Proceeds of $266.8 Million December 7th, 2019

Artificial cells act more like the real thing December 6th, 2019

Arrowhead Pharmaceuticals Announces Pricing of Underwritten Public Offering of Common Stock December 5th, 2019

Arrowhead Pharmaceuticals Announces Proposed Underwritten Offering of Common Stock December 3rd, 2019

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project