Comparison of facial skin ageing in healthy Asian and Caucasian females quantified by in vivo line-field confocal optical coherence tomography 3D imaging.

IF 2 4区 医学 Q3 DERMATOLOGY Skin Research and Technology Pub Date : 2024-09-01 DOI:10.1111/srt.13643
Assi Ali, Lopez Colombe, Pedrazzani Mélanie, Pignol-Lavoix Agnes, Nili Meryem, Ralambondrainy Samuel, Grignon Guénolé, Cauchard Jean-Hubert, Korichi Rodolphe, Bonnier Franck
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Abstract

Background: Quantitative biomarkers of facial skin aging were investigated in 109 healthy Asian female volunteers, aged 20 to 70 years.

Materials and methods: In vivo 3D Line-field Confocal Optical Coherence Tomography (LC-OCT) imaging, enhanced by Artificial Intelligence (AI)-based quantification algorithms, was utilized to compute various metrics, including stratum corneum thickness (SC), viable epidermal (VE) thickness, and Dermal-Epidermal Junction (DEJ) undulation along with cellular metrics for the temple, cheekbone, and mandible.

Results: Comparison with data from a cohort of healthy Caucasian volunteers revealed similarities in the variations of stratum corneum and viable epidermis layers, as well as cellular shape and size with age in both ethnic groups. However, specific findings emerged, such as larger, more heterogeneous nuclei in both layers, demonstrated by an increase in nuclei volume and their standard deviation, and increased network atypia, all showing significant age-related variations. Caucasian females exhibited a flatter and more homogeneous epidermis, evidenced by a decreased standard deviation of the number of layers, and a less dense cellular network with fewer cells per layer, indicated by a decrease in cell surface density.

Conclusion: Ethnicity-wise comparisons highlighted distinct biological features specific to each population. Asian individuals showed significantly higher DEJ undulation, higher compactness, and lower cell network atypia compared to their Caucasian counterparts across age groups. Differences in stratum corneum and viable epidermal thickness on the cheekbone were also significant. LC-OCT 3D imaging provides valuable insights into the aging process in different populations and underscores inherent biological differences between Caucasian and Asian female volunteers.

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通过活体线场共焦光学相干断层扫描三维成像量化亚裔和白种健康女性面部皮肤老化的比较。
背景:在109名20至70岁的健康亚洲女性志愿者中研究了面部皮肤老化的定量生物标志物:利用基于人工智能(AI)的量化算法增强的活体三维线场共焦光学相干断层扫描(LC-OCT)成像计算各种指标,包括太阳穴、颧骨和下颌骨的角质层厚度(SC)、存活表皮厚度(VE)、真皮-表皮交界处起伏(DEJ)以及细胞指标:与健康白种人志愿者的数据进行比较后发现,两个种族群体的角质层和有活力表皮层以及细胞形状和大小随年龄的变化具有相似性。不过,也出现了一些特殊的发现,如两层细胞中的细胞核更大、更不均匀,表现为细胞核体积及其标准偏差的增加,以及网络不典型性的增加,所有这些都显示出与年龄相关的显著变化。白种女性的表皮更扁平、更均匀,表现为表皮层数的标准偏差减少;细胞表面密度降低,表现为细胞网络密度降低,每层细胞数量减少:按种族进行的比较凸显了每个人群特有的生物特征。与不同年龄段的白种人相比,亚洲人的角质层起伏明显更高、紧密度更高、细胞网络不典型性更低。颧骨上角质层和存活表皮厚度的差异也很明显。LC-OCT三维成像为了解不同人群的衰老过程提供了有价值的信息,并强调了白种人和亚裔女性志愿者之间固有的生物学差异。
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来源期刊
Skin Research and Technology
Skin Research and Technology 医学-皮肤病学
CiteScore
3.30
自引率
9.10%
发文量
95
审稿时长
6-12 weeks
期刊介绍: Skin Research and Technology is a clinically-oriented journal on biophysical methods and imaging techniques and how they are used in dermatology, cosmetology and plastic surgery for noninvasive quantification of skin structure and functions. Papers are invited on the development and validation of methods and their application in the characterization of diseased, abnormal and normal skin. Topics include blood flow, colorimetry, thermography, evaporimetry, epidermal humidity, desquamation, profilometry, skin mechanics, epiluminiscence microscopy, high-frequency ultrasonography, confocal microscopy, digital imaging, image analysis and computerized evaluation and magnetic resonance. Noninvasive biochemical methods (such as lipids, keratin and tissue water) and the instrumental evaluation of cytological and histological samples are also covered. The journal has a wide scope and aims to link scientists, clinical researchers and technicians through original articles, communications, editorials and commentaries, letters, reviews, announcements and news. Contributions should be clear, experimentally sound and novel.
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