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Related Concept Videos

Lipids as Anchors01:32

Lipids as Anchors

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In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
The carboxy-terminal of most of the prenylated proteins, such as Ras proteins, contains...
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Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: Identification of New Drug Targets

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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...
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Pharmacogenetics of Drug Transporters: P-Glycoprotein and Solute Carrier Transporters01:16

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

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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...
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Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Carrier-Mediated Transport01:06

Carrier-Mediated Transport

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Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
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GPI Anchoring of Proteins in the ER Membrane01:29

GPI Anchoring of Proteins in the ER Membrane

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GPI-anchoring is a post-translational, reversible protein modification that is ubiquitous in eukaryotes. Such proteins are primarily present on the exoplasmic leaflet of the plasma membrane.
GPI-anchor structure
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Related Experiment Video

Updated: Mar 18, 2026

Formulating and Characterizing Lipid Nanoparticles for Gene Delivery using a Microfluidic Mixing Platform
09:41

Formulating and Characterizing Lipid Nanoparticles for Gene Delivery using a Microfluidic Mixing Platform

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PGMA-based gene carriers with lipid molecules.

Chen Xu1, Bingran Yu, Hao Hu

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.

Biomaterials Science
|July 5, 2016
PubMed
Summary

Researchers developed novel lipid-conjugated polycations, cholesterol (CHO)- and phosphatidylinositol (PI)-terminated ethanolamine-functionalized poly(glycidyl methacrylate)s (CHO-PGEAs and PI-PGEAs), for enhanced gene therapy. These carriers show improved transfection efficiency and potent anti-tumor effects in vitro and in vivo.

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Using Lipid Nanoparticles for the Delivery of Chemically Modified mRNA into Mammalian Cells
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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA
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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA

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Last Updated: Mar 18, 2026

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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA
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Generation of Cationic Nanoliposomes for the Efficient Delivery of In Vitro Transcribed Messenger RNA

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Area of Science:

  • Biomaterials Science
  • Gene Therapy
  • Polymer Chemistry

Background:

  • Lipids are key cell membrane components with excellent biological properties for biomedical applications.
  • Integrating membrane lipids into gene vectors can enhance biocompatibility, cellular uptake, and transfection efficiency.
  • Developing effective gene carriers is crucial for advancing gene therapy.

Purpose of the Study:

  • To propose a flexible strategy for conjugating lipid molecules with polycations using atom transfer radical polymerization.
  • To synthesize and characterize cholesterol (CHO)- and phosphatidylinositol (PI)-terminated ethanolamine-functionalized poly(glycidyl methacrylate)s (CHO-PGEAs and PI-PGEAs).
  • To evaluate the gene delivery performance and anti-tumor effects of the novel lipid-conjugated polycations.

Main Methods:

  • Atom transfer radical polymerization was employed to synthesize lipid-terminated polycations.
  • Cholesterol (CHO) and phosphatidylinositol (PI) moieties were conjugated to ethanolamine-functionalized poly(glycidyl methacrylate)s.
  • Transfection efficiency was compared against linear poly(glycidyl methacrylate) (BUCT-PGEA) and branched polyethylenimine (PEI).
  • In vitro and in vivo anti-tumor effects were assessed using suppressor tumor gene p53 systems.

Main Results:

  • CHO-PGEAs and PI-PGEAs exhibited significantly enhanced transfection performances compared to BUCT-PGEA and PEI (25 kDa).
  • The novel lipid-conjugated polycations demonstrated notable anti-tumor effects.
  • Successful in vitro and in vivo evaluation of gene delivery and therapeutic efficacy.

Conclusions:

  • A novel strategy for conjugating lipid molecules with polycations was successfully developed.
  • CHO-PGEAs and PI-PGEAs represent effective gene carriers with improved transfection capabilities.
  • This approach offers a promising new avenue for developing advanced gene therapy strategies.