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Related Concept Videos

The Significance of Membrane Transport01:44

The Significance of Membrane Transport

The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
Membrane Transporters01:31

Membrane Transporters

Transporters are essential membrane transport proteins with functions related to cell nutrition, homeostasis, communication, etc. Approximately 7% of all genes in the human genome code for transporters or transporter-related proteins.
Transporters are mainly composed of alpha-helices, built from bundles of ten or more helices traversing the plasma membrane. The solute-binding sites are located midway, where some of the helices are broken or distorted, making space for the binding site through...
Introduction to Membrane Traffic01:44

Introduction to Membrane Traffic

The ER, Golgi apparatus, endosomes, and lysosomes work in tandem to modify, sort, and package proteins and lipids. An integrated membrane trafficking network facilitates the back and forth shuttling of molecules within different organelles in the same cell or across the cell membrane.
The transport of soluble and membrane proteins is mediated by transport vesicles that collect cargo from one cellular compartment and deliver it to another by fusing with the target organelle membrane. The Rab...
The Significance of Membrane Transport01:44

The Significance of Membrane Transport

The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
Cellular Membranes and Drug Transport01:24

Cellular Membranes and Drug Transport

Drugs must traverse multiple biological barriers, such as multi-layered skin, single-layered intestinal epithelium, and the plasma membrane, to reach their target sites within the body. The plasma membrane, a highly structured composite of phospholipids, carbohydrates, and proteins, is the cell's protective boundary, facilitating selective substance exchange.
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.
Facilitated Diffusion01:16

Facilitated Diffusion

The plasma membrane, a critical structure in cellular biology, houses an array of transporters, or carrier proteins, interspersed within its lipid bilayer. These proteins play a crucial role in solute transport through facilitated diffusion, a form of passive diffusion that uses transporters to move the molecules across the membrane.
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...

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Related Experiment Video

Updated: Jul 24, 2026

Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
11:55

Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution

Published on: August 16, 2016

Overview of membrane transport.

D M Oh1, G L Amidon

  • 1Department of Pharmacokinetics, Dynamics, and Metabolism, Parke-Davis Pharmaceutical Research Division, Warner-Lambert Company, Ann Arbor, Michigan 48105, USA.

Pharmaceutical Biotechnology
|April 1, 2000
PubMed
Summary

Pharmaceutical scientists use membrane transporters to improve drug delivery by overcoming biological barriers. Understanding these transporters enhances drug absorption and targeting for better therapeutic strategies.

Area of Science:

  • Pharmacology
  • Biotechnology
  • Drug Delivery Systems

Background:

  • Biological barriers, including epithelial, endothelial, elimination, and target cell barriers, present challenges in drug delivery.
  • Membrane transporters are crucial for regulating the entry and exit of drugs within the body.
  • Existing drug delivery strategies can be enhanced by leveraging the functions of specific transporters.

Purpose of the Study:

  • To highlight the increasing utilization of membrane transporters in pharmaceutical science for drug delivery and targeting.
  • To emphasize the importance of understanding transporter characteristics and regulation for developing advanced drug delivery strategies.
  • To explore the potential of transporters, such as peptide transporters, in improving drug absorption, for example, oral bioavailability.

Main Methods:

Keywords:
Non-programmatic

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Demonstration of Membrane Transport of Histidine using Goat Intestinal Inverted Sacs: An Experiential Pedagogical Tool for Undergraduates
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  • Review of current literature on membrane transporters in drug delivery.
  • Analysis of the role of transporters in overcoming biological barriers.
  • Discussion of strategies for identifying and characterizing transporter functions.

Main Results:

  • Membrane transporters are key players in navigating biological barriers like epithelial and endothelial layers.
  • Transporter-mediated drug delivery offers potential for enhanced oral absorption and targeted therapies.
  • Further research into transporter identification, characterization, and regulation is essential.

Conclusions:

  • Membrane transporters represent a significant opportunity for optimizing drug delivery and targeting.
  • A deeper understanding of transporter mechanisms will lead to more effective pharmaceutical interventions.
  • Leveraging transporters can overcome major hurdles in drug development and patient treatment.