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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.
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Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
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Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be...
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Group therapy is a sociocultural approach to psychological treatment, where individuals with shared psychological challenges come together under the guidance of a mental health professional. This therapeutic modality offers unique opportunities for individuals to connect, share, and grow within the context of a supportive group. By fostering mutual understanding and collaboration, group therapy can address a range of psychological concerns effectively, often complementing or surpassing the...
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Substituents on the benzene ring that direct an incoming electrophile to undergo substitution at the meta position are called meta directors. All meta directors either have a positive charge on the atom directly bonded to the ring or a partial positive charge. These groups function by withdrawing electrons from the ring through inductive and resonance effects. Consider the carbocation intermediates formed upon the addition of an electrophile on nitrobenzene at the...
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Directing Effect of Substituents: ortho–para-Directing Groups01:14

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Ortho–para directors are substituent groups attached to the benzene ring and direct the addition of an electrophile to the positions ortho or para to the substituent. All electron-donating groups are considered ortho–para directors. They donate electrons to the ring and make the ring more electron-rich. The ring is therefore susceptible to the addition of electrophiles. Substituents such as amino, hydroxy, or alkoxy, containing lone pairs on the atom adjacent to the ring, donate...
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A multifunctional toolkit for target-directed cancer therapy.

Montserrat Terrazas1, Dani Sánchez, Federica Battistini

  • 1Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology (BIST), Joint IRB-BSC Program in Computational Biology, Baldiri Reixac 10-12, 08028 Barcelona, Spain. montserrat.terrazas@irbbarcelona.org modesto.orozco@irbbarcelona.org.

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We developed 2shRNA, a novel nanobinder that targets two drug resistance pathways simultaneously. This innovative approach effectively kills HER2+ breast cancer cells without needing transfection agents.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Cancer Research

Background:

  • Drug resistance is a major challenge in cancer therapy.
  • Simultaneous targeting of multiple pathways can overcome resistance.
  • RNA interference (RNAi) offers a powerful tool for gene silencing.

Purpose of the Study:

  • To develop a novel nanobinder capable of simultaneously targeting two therapeutic targets.
  • To engineer a system for delivering short hairpin RNA (shRNA) without transfection agents.
  • To create a targeted therapy for HER2-positive (HER2+) breast cancer.

Main Methods:

  • Design and construction of 2shRNA nanobinders.
  • Incorporation of shRNA sequences targeting key drug resistance genes.
  • Addition of cell-targeting peptides for specific delivery.
  • In vitro testing of 2shRNA efficacy against HER2+ breast cancer cells.

Main Results:

  • 2shRNA successfully binds accessory molecules like peptides and fluorophores.
  • The developed 2shRNAs specifically target and kill HER2+ breast cancer cells.
  • Effective cancer cell killing was achieved without the need for transfection agents.

Conclusions:

  • 2shRNA represents a promising new platform for multi-target cancer therapy.
  • This technology enables targeted delivery and simultaneous inhibition of resistance pathways.
  • 2shRNA offers a potential non-transfection-based therapeutic strategy for HER2+ breast cancer.