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Structure-Activity Relationships and Drug Design01:28

Structure-Activity Relationships and Drug Design

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Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
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The Ras Gene02:38

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The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
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Related Experiment Video

Updated: Jul 13, 2025

Fully Processed Recombinant KRAS4b: Isolating and Characterizing the Farnesylated and Methylated Protein
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Structure-Based Design and Synthesis of Potent and Selective KRAS G12D Inhibitors.

Hengmiao Cheng1, Puhui Li1, Ping Chen1

  • 1Erasca Inc., 3115 Merryfield Row, Suite 300, San Diego, California 92121, United States.

ACS Medicinal Chemistry Letters
|October 18, 2023
PubMed
Summary

Researchers developed a new drug, ERAS-5024, targeting the KRAS G12D mutation common in pancreatic cancer. This potent inhibitor shows promise in preclinical studies, reducing tumor growth and proliferation.

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Area of Science:

  • Oncology
  • Medicinal Chemistry
  • Molecular Biology

Background:

  • The KRAS G12D mutation is prevalent in pancreatic ductal adenocarcinoma (PDAC), representing a significant therapeutic target.
  • Targeting oncogenic KRAS mutations is a critical area of cancer research.

Purpose of the Study:

  • To design and synthesize novel, potent, and selective inhibitors targeting the KRAS G12D mutation.
  • To evaluate the preclinical efficacy of the lead compound ERAS-5024 in relevant cancer models.

Main Methods:

  • Structure-based drug design principles were employed to identify potential inhibitors.
  • In vitro assays (e.g., Cell-Titer Glo) were used to assess compound potency and effects on cell proliferation.
  • In vivo efficacy studies were conducted to evaluate tumor regression.

Main Results:

  • A series of potent and selective KRAS G12D inhibitors were successfully designed and synthesized.
  • The lead compound, ERAS-5024, demonstrated single-digit nanomolar potency in inhibiting ERK1/2 phosphorylation and cell proliferation in AsPC-1 PDAC cells.
  • ERAS-5024 exhibited significant tumor regression in in vivo efficacy studies.

Conclusions:

  • The discovery of ERAS-5024 represents a significant advancement in targeting KRAS G12D-mutated pancreatic cancer.
  • ERAS-5024 shows potential as a therapeutic agent for PDAC and warrants further clinical investigation.