Combined multiphoton imaging and biaxial tissue extension for quantitative analysis of geometric fiber organization in human reticular dermis

Maho Ueda, Susumu Saito, Teruasa Murata, Tomoko Hirano, Ryoma Bise, Kenji Kabashima, Shigehiko Suzuki

Research output: Contribution to journalArticle

Abstract

The geometric organization of collagen fibers in human reticular dermis and its relationship to that of elastic fibers remain unclear. The tight packing and complex intertwining of dermal collagen fibers hinder accurate analysis of fiber orientation. We hypothesized that combined multiphoton microscopy and biaxial extension could overcome this issue. Continuous observation of fresh dermal sheets under biaxial extension revealed that the geometry of the elastic fiber network is maintained during expansion. Full-thickness human thigh skin samples were biaxially extended and cleared to visualize the entire reticular dermis. Throughout the dermis, collagen fibers straightened with increased inter-fiber spaces, making them more clearly identifiable after extension. The distribution of collagen fibers was evaluated with compilation of local orientation data. Two or three modes were confirmed in all superficial reticular layer samples. A high degree of local similarities in the direction of collagen and elastic fibers was observed. More than 80% of fibers had directional differences of ≤15°, regardless of layer. Understanding the geometric organization of fibers in the reticular dermis improves the understanding of mechanisms underlying the pliability of human skin. Combined multiphoton imaging and biaxial extension provides a research tool for studying the fibrous microarchitecture of the skin.

Original languageEnglish
Article number10644
JournalScientific reports
Volume9
Issue number1
DOIs
Publication statusPublished - Dec 1 2019

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Dermis
Collagen
Elastic Tissue
Skin
Reticulin
Thigh
Pliability
Microscopy
Observation
Research

All Science Journal Classification (ASJC) codes

  • General

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Combined multiphoton imaging and biaxial tissue extension for quantitative analysis of geometric fiber organization in human reticular dermis. / Ueda, Maho; Saito, Susumu; Murata, Teruasa; Hirano, Tomoko; Bise, Ryoma; Kabashima, Kenji; Suzuki, Shigehiko.

In: Scientific reports, Vol. 9, No. 1, 10644, 01.12.2019.

Research output: Contribution to journalArticle

Ueda, Maho ; Saito, Susumu ; Murata, Teruasa ; Hirano, Tomoko ; Bise, Ryoma ; Kabashima, Kenji ; Suzuki, Shigehiko. / Combined multiphoton imaging and biaxial tissue extension for quantitative analysis of geometric fiber organization in human reticular dermis. In: Scientific reports. 2019 ; Vol. 9, No. 1.
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