Using nanotechnology to fight cancer

Using nanotechnology to fight cancer

May 10, 2005

Last fall, The National Cancer Institute (NCI) announced a new $144.3 million, five-year initiative to develop and apply nanotechnology to the fight against cancer.

Through this initiative, NCI hopes to further enable the early detection, diagnosis, and treatment of cancer.

According to the NCI web site, “nanotechnology involves the development and engineering of devices so small that they are measured on a molecular scale Because of their small size, nanoscale devices can readily interact with biomolecules on both the surface of cells and inside of cells. By gaining access to so many areas of the body, they have the potential to detect disease and deliver treatment in ways unimagined before now. Since biological processes—including events that lead to cancer—occur at the nanoscale at and inside cells, nanotechnology offers a wealth of tools that are providing cancer researchers with new and innovative ways to diagnose and treat cancer.”

Nanotechnology has already demonstrated promising results in cancer research and treatment. A release from NCI notes some recent advances in cancer treatment involving nanotechnology:

• Nanotechnology has been used to create new and improved imaging techniques to find small tumors. Researchers have shown that incredibly small iron oxide particles (nanoparticulates) can be used with magnetic resonance imaging (MRI) to accurately detect cancers that have spread to lymph nodes, without requiring surgery.
• Nanoscale drug delivery devices are being developed to deliver anticancer therapeutics specifically to tumors. Liposomes are one such “first generation” nanoscale device. Liposomal doxorubicin is used to treat specific forms of cancer, while liposomal amphotericin B treats fungal infections often associated with aggressive anticancer treatment. Recently, a nanoparticulate formulation of the well-known anticancer compound taxol was submitted as a new treatment for advanced stage breast cancer.
• In the near future, nanoscale devices may lead to detection of the earliest stages of cancer while simultaneously delivering anticancer agents to the tumor. Early research has shown that nanoparticulate sensors can detect the cell death that occurs when a cancer cell succumbs to the effects of an anticancer drug. As a highly sensitive means of determining if a therapy is working, this application of nanotechnology could save a patient from months of ineffective medication and debilitating side effects, allowing a switch to a potentially more effective course of treatment. In addition, such a sensor could greatly accelerate clinical trials of new anticancer agents, again by demonstrating very early signals of the effectiveness of a drug.

To learn more about The NCI Alliance for Nanotechnology in Cancer take a look at http://nano.cancer.gov/media_backgrounder.asp

NCI PRESS RELEASE

National Cancer Institute Announces Major Commitment to Nanotechnology for Cancer Research

The National Cancer Institute (NCI) announced today at a media briefing a new $144.3 million, five-year initiative to develop and apply nanotechnology to cancer. Nanotechnology, the development and engineering of devices so small that they are measured on a molecular scale, has already demonstrated promising results in cancer research and treatment.

“Nanotechnology has the potential to radically increase our options for prevention, diagnosis, and treatment of cancer,” said Andrew von Eschenbach, M.D., director of the National Cancer Institute. “NCI’s commitment to this cancer initiative comes at a critical time. Nanotechnology supports and expands the scientific advances in genomics and proteomics and builds on our understanding of the molecular underpinnings of cancer. These are the pillars which will support progress in cancer.”

To carry out this initiative, the NCI, part of the National Institutes of Health, is forming the NCI Alliance for Nanotechnology in Cancer, a comprehensive, integrated initiative encompassing researchers, clinicians, and public and private organizations that have joined forces to develop and translate cancer-related nanotechnology research into clinical practice.

“The Alliance lays out a process to safely accelerate the application of nanotechnology to cancer research,” said NCI Deputy Director Anna Barker, Ph.D. “Central to this initiative will be multidisciplinary partnerships involving physicists, biologists, clinicians, engineers, and other experts that can translate knowledge on cancer and nanotechnology into clinically useful products.”

The new NCI Alliance for Nanotechnology in Cancer is one of the first steps in implementing the Cancer Nanotechnology Plan, which was developed over the past 18 months with the input of a broad cross-section of the cancer research and clinical oncology communities. The NCI Alliance consists of four major program activities:

• Centers of Cancer Nanotechnology Excellence (CCNEs) : T he primary goal of the CCNEs is to integrate nanotechnology development into basic and applied cancer research. Each center will be affiliated with a NCI Comprehensive Cancer Center, university, or research center of engineering and physical science. By leveraging existing NCI resources, these centers will bridge gaps in the development pipeline from materials discovery to preclinical testing.
• Multidisciplinary research teams : Given the multidisciplinary nature of nanotechnology research, investigators with basic science and clinical backgrounds will require training to optimize the development and translation of nanotechnologies toward clinical oncology applications. The NCI will initially use existing career development mechanisms to direct talent to this area, create incentives for cross-disciplinary research, and foster collaboration through training.
• Nanotechnology platforms for cancer research : Over the next five years, investigator-initiated and directed project research will be supported in six key programmatic areas: molecular imaging and early detection, in vivo imaging, reporters of efficacy (e.g., real-time assessment of treatment), multifunctional therapeutics, prevention and control, and research enablers (opening new pathways for research).
• Nanotechnology Characterization Laboratory (NCL) : The NCL will perform and standardize the pre-clinical characterization of nanomaterials developed by researchers from academia, government, and industry. The NCL will serve as a national resource and knowledge base for cancer researchers, and facilitate the accelerated regulatory review and translation of nanomaterials and devices into the clinical realm.

The NCI recently signed a memorandum of understanding and an interagency agreement with the National Institute of Standards and Technology to partner with the NCI in this characterization and standardization effort. The NCI will also be working to expand collaborations with the U.S. Food and Drug Administration (FDA) to help define the critical pathway for nanotechnologies to reach the clinic.

Among the key components of the Cancer Nanotechnology Plan are milestones to measure success over two time periods. Within the first three years, the plan calls for acceleration of projects that hold promise for near-term clinical application. After three years, the Alliance will focus on developing solutions to address more difficult technological and biological problems that have the potential to impact detection and treatment.

“We are already seeing how nanotechnology is transforming our ability to translate research advances into clinical advances,” said Samuel Wickline, M.D., Professor of Medicine, Physics and Biomedical Engineering at Washington University, St. Louis, Mo., and NCI grantee for nanotechnology research. “The possibilities are enormous for finding very small cancers far earlier than ever before and treating them with powerful drugs at the tumor site alone, while at the same time reducing any harmful side effects. This initiative will allow us to explore using this technology to its full potential.”

Recent advances in cancer treatment involving nanotechnology include:

• Liposomes, the “first generation” of nanoscale drug delivery devices, were developed to deliver anticancer therapeutics directly at tumors. Specifically, liposomal doxorubicin is being used to treat certain forms of cancer, while liposomal amphotericin B treats fungal infections often associated with aggressive anticancer treatments.

• Recently, a nanoparticulate formulation of the well-known anticancer compound taxol was submitted to the FDA as a new treatment for advanced-stage breast cancer.

Other clinical applications of nanotechnology have focused on identifying cancer in its earliest stages, visualizing development of the disease, delivering improved therapy to increase the effectiveness and reduce side effects of drugs, and capturing early signals of drug efficacy.

This article used information from NCI.

Article published by Rhett Butler

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