Related Experiment Video

Updated: Apr 4, 2026

Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
08:46

Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms

Published on: December 9, 2015

11.3K

Decoding P21 Activated Kinase-1 (PAK1) and Drug-Resistance Enigma

Sambuddha Sengupta1, Ganesh Venkatraman1

  • 1School of Biosciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, India.

Cell Biochemistry and Function
|April 3, 2026
PubMed

Insights

Drug resistance in cancer is a major challenge. This study found that altered kinases, including Pak1 (p21-activated kinase), contribute to chemoresistance, suggesting combination kinase inhibitor therapy may improve patient outcomes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Drug resistance, or chemoresistance, significantly impedes cancer treatment efficacy.
  • Pak1 (p21-activated kinase), a serine/threonine kinase, is an oncogene linked to tumor progression and poor prognosis.
  • Pak1 has been previously implicated in resistance to tamoxifen and gemcitabine.

Purpose of the Study:

  • To investigate the role of Pak1 in chemoresistance.
  • To identify other kinases contributing to drug resistance in various cancers.
  • To explore the link between kinase alterations, drug resistance, and patient prognosis.

Main Methods:

  • An integrative approach was used to study Pak1 and other kinases.
  • Analysis focused on resistance mechanisms to 12 common cancer drugs.
  • Investigated correlations between kinase mutations, drug resistance, and patient outcomes.

Main Results:

  • Identified 25 additional kinases involved in resistance to commonly used cancer drugs.
  • Found that mutated Pak1 and multiple kinase alterations are associated with poor prognosis in resistant tumors.
  • Pak1's role in conferring chemoresistance was further elucidated.

Conclusions:

  • Altered kinase detection in resistant tumors is crucial for effective cancer therapy.
  • Combination therapy with kinase inhibitors may be more effective than single agents.
  • Targeting multiple kinases could overcome drug resistance and improve treatment outcomes.
Keywords:
KinasesPak1breast cancerdrug resistancehead and neck cancerpancreatic cancer

More Related Videos

A Method for Screening and Validation of Resistant Mutations Against Kinase Inhibitors12:40

A Method for Screening and Validation of Resistant Mutations Against Kinase Inhibitors

Published on: December 7, 2014

15.3K
Amide Hydrogen/Deuterium Exchange & MALDI-TOF Mass Spectrometry Analysis of Pak2 Activation07:15

Amide Hydrogen/Deuterium Exchange & MALDI-TOF Mass Spectrometry Analysis of Pak2 Activation

Published on: November 26, 2011

18.2K

Related Concept Videos

Treatment Resistant Cancers02:56

Treatment Resistant Cancers

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...
3.9K
PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
6.4K
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
7.9K
DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
10.4K
Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: Identification of New Drug Targets

Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
86
Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters01:16

Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters

The pharmacogenetics of drug transporters is increasingly recognized as a critical factor influencing interindividual variability in drug absorption, distribution, and elimination. These membrane-bound proteins regulate drugs' movement across cellular barriers by actively pumping them out (efflux) or facilitating their uptake (influx). Among the major transporter families, ATP-binding cassette (ABC) and solute carrier (SLC) transporters play particularly prominent roles. Genetic polymorphisms...
125