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Atomic force microscopic studies on erythrocytes from an evolutionary perspective
Kajal Bhattacharyya1, Tapan Guha, Radhaballav Bhar
1Electron Microscope Centre (USIC), University College of Science, Calcutta University, Calcutta, India.
Summary
Erythrocyte membrane architecture shows remarkable conservation across diverse vertebrate phyla, with similar blebs and depressions observed. Atomic force microscopy and lateral force microscopy revealed conserved nanostructures and surface friction patterns in red blood cells.
Area of Science:
- Cell Biology
- Biophysics
- Evolutionary Biology
Background:
- Erythrocyte membrane structure is crucial for cell function and survival.
- Understanding the evolutionary conservation of erythrocyte surface architecture provides insights into cellular adaptation.
Purpose of the Study:
- To investigate the conservation of erythrocyte membrane architecture across different vertebrate phyla.
- To compare surface structures and friction patterns using advanced microscopy techniques.
Main Methods:
- Atomic Force Microscopy (AFM) was used to image the surface topography of erythrocytes.
- Lateral Force Microscopy (LFM) was employed to assess surface friction and roughness.
- Erythrocytes from human, avian, reptilian, amphibian, and piscine species were analyzed.
Main Results:
- A consistent pattern of globular blebs and hole-like depressions was observed across all examined phyla.
- Significant variations in the size of these features were noted, with specific dimensions provided for fish and chickens.
- LFM revealed well-ordered strata on toad erythrocytes, indicating surface friction patterns not evident with AFM alone.
Conclusions:
- The general pattern of erythrocyte membrane architecture is highly conserved throughout vertebrate evolution.
- Minor modifications in the size of surface nanostructures occur across different species.
- AFM and LFM are powerful tools for elucidating erythrocyte surface characteristics and evolutionary patterns.