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Related Experiment Video

Updated: Feb 20, 2026

Fabrication of Gradient Nanopattern by Thermal Nanoimprinting Technique and Screening of the Response of Human Endothelial Colony-forming Cells

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Analyzing orientation patterns of human skin fibroblasts using image gradient information.

Md Khayrul Bashar, Kei Hashimoto, Mari Gotoh

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|October 25, 2017

Summary

Collagen influences human skin fibroblast movement. This study developed an image analysis method to show that fibroblasts exhibit reduced orientation patterns when cultured on collagen, indicating significant behavioral changes.

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Isolation of Papillary and Reticular Fibroblasts from Human Skin by Fluorescence-activated Cell Sorting

Isolation of Papillary and Reticular Fibroblasts from Human Skin by Fluorescence-activated Cell Sorting

Published on: May 7, 2019

Area of Science:

Dermatology
Cell Biology
Biophysics

Background:

Fibroblasts in the dermis produce collagen, a key connective tissue component.
The impact of collagen on human skin fibroblast motion remains under-investigated.
Understanding fibroblast behavior is crucial for dermal tissue engineering and wound healing.

Purpose of the Study:

To develop and validate an image analysis method for quantifying collagen's effect on fibroblast motion.
To investigate how collagen influences the orientation characteristics of human skin fibroblasts.
To provide a quantitative measure for fibroblast orientation behavior.

Main Methods:

Image analysis using gradient-based descriptors: Histogram of Oriented Gradients (HOG), modified HOG (modiHOG), and Gradient Direction Histogram (GDH).
Division of images into disjoint blocks for feature extraction.
Definition of an orientation similarity function and the first minimum similarity distance index.
Experimental comparison of fibroblast cultures with and without collagen coating.

Main Results:

Skin fibroblasts cultured with collagen coating exhibited smaller orientation patterns compared to those without.
The image analysis method successfully quantified differences in fibroblast orientation behavior.
Statistical t-test confirmed significant differences in orientation patterns between the two culture conditions.

Conclusions:

Collagen significantly alters the orientation behavior of human skin fibroblasts.
The developed image analysis method provides a reliable tool for studying cell motion dynamics.
Findings suggest collagen's role in regulating fibroblast organization within dermal tissue.