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Related Concept Videos

Combination Therapies and Personalized Medicine02:50

Combination Therapies and Personalized Medicine

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Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
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Cancer Therapies02:49

Cancer Therapies

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Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
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Targeted Cancer Therapies02:57

Targeted Cancer Therapies

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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
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Tumor Immunotherapy01:27

Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Cancer Vaccines01:30

Cancer Vaccines

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Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
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Treatment Resistant Cancers02:56

Treatment Resistant Cancers

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Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
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Related Experiment Video

Updated: Feb 16, 2026

Potentiation of Anticancer Antibody Efficacy by Antineoplastic Drugs: Detection of Antibody-drug Synergism Using the Combination Index Equation
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On the Design of Combination Cancer Therapy.

James H Doroshow1, Richard M Simon2

  • 1Division of Cancer Treatment and Diagnosis, National Cancer Institute, NIH, Bethesda, MD, USA; Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, USA.

Cell
|December 16, 2017
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Combination cancer therapy shows limited clinical synergy. Studies suggest that even successful treatments often work through individual drug effects, not combined interactions, challenging current approaches to cancer drug development.

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Area of Science:

  • Oncology
  • Pharmacology
  • Translational Medicine

Background:

  • Combination therapy is standard for treating human malignancies.
  • Synergistic drug interactions are sought to improve treatment efficacy.

Purpose of the Study:

  • To evaluate the clinical translation of synergistic anticancer drug interactions observed in vitro.
  • To determine if combination therapy success is due to synergy or independent drug action.

Main Methods:

  • Analysis of cell culture data for synergistic drug interactions.
  • Review of results from mouse models and human clinical trials of combination therapies.

Main Results:

  • In vitro synergistic drug interactions rarely translate to clinical efficacy.
  • Successful combination therapies are often explained by the additive effects of individual drugs.
  • Clinical outcomes do not consistently support in vitro synergy findings.

Conclusions:

  • The clinical relevance of in vitro synergistic anticancer drug interactions is questionable.
  • Independent drug activities are a more likely explanation for successful combination therapies.
  • Rethinking preclinical models and clinical trial analysis for combination cancer treatments is warranted.