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Updated: Feb 3, 2026
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Analyzing Cellular Internalization of Nanoparticles and Bacteria by Multi-spectral Imaging Flow Cytometry
Published on: June 8, 2012
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Cellular internalization of polypeptide-based nanoparticles: effects of size, shape and surface morphology
Jiaxiao Xue1, Zhou Guan, Xingyu Zhu
1Shanghai Key Laboratory of Advanced Polymeric Materials, State Key Laboratory of Bioreactor Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China. jlin@ecust.edu.cn caichunhua@ecust.edu.cn.
Biomaterials Science
|October 19, 2018
Summary
Smaller size, rod-like shape, and helical or striped surfaces enhance nanoparticle (NP) cellular uptake. These structural features influence NP surface area and internalization pathways, guiding nanocarrier design.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Cell Biology
Background:
- Cellular uptake of nanoparticles (NPs) is crucial for drug delivery and nanomedicine.
- The influence of NP structural characteristics on cellular internalization remains underexplored.
Purpose of the Study:
- To investigate how size, shape, and surface morphology of NPs affect their cellular internalization.
- To guide the design of nanocarriers with improved cellular uptake efficiency.
Main Methods:
- Synthesis of various NPs (helical rods, striped spheres, smooth spheres) using block copolymers and homopolymers.
- Combination of experimental studies and theoretical simulations to assess cellular internalization.
- Utilized fluorescein isothiocyanate (FITC)-labeled block copolymers for NP characterization.
Main Results:
- NPs with smaller size, rod-like shape, and helical/striped surface morphology demonstrated higher cellular internalization efficiency.
- Differences in internalization were linked to variations in NP surface area and uptake pathways.
- Findings provide insights into the internalization mechanisms of structurally similar natural nanoparticles, such as viruses.
Conclusions:
- NP size, shape, and surface patterns significantly impact cellular internalization.
- Optimized NP design can enhance cellular uptake for targeted delivery applications.
- This research deepens the understanding of NP-cell interactions and informs future nanomedicine development.
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