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The Effect of Aging on Tissues

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...

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Related Experiment Video

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Author Spotlight: Unraveling the Pathogenesis of Age-Related Macular Degeneration and Discovering Potential Therapies

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An Experimental Model Design for Photoaging.

Yingfang Fan¹, Jae Hoon Jeong, Ga Young You

¹Department of Plastic and Reconstructive Surgery, Seoul National University College of Medicine, Seoul, South Korea.

The Journal of Craniofacial Surgery

|August 13, 2015

Summary

Researchers developed a new nude mouse model for photoaging studies. This model shows increased wrinkles and skin thickness after ultraviolet-B irradiation, making it suitable for future research.

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Area of Science:

Dermatology
Stem Cell Research
Animal Models

Background:

Autologous adipose-derived stem cells show promise for treating photodamaged skin and wrinkles.
Nude mice are commonly used in studies involving skin fillers but lack a photoaging model.
Developing a photoaging model is crucial for advancing research in this area.

Purpose of the Study:

To develop and validate a nude mouse model of photoaging.
To establish a reliable platform for studying skin aging induced by ultraviolet radiation.

Main Methods:

BALB/c nude mice were exposed to ultraviolet-B radiation six times weekly for six weeks.
Minimum erythema dose was determined to optimize irradiation dosage and minimize inflammation.
Skin replica analysis and biopsies were used to assess wrinkle size, depth, and skin thickness.

Main Results:

Ultraviolet-B irradiation significantly increased wrinkle size and depth in nude mice compared to controls.
Epidermal and dermal thickness significantly increased post-irradiation.
Collagen fiber levels were reduced in the ultraviolet-B-irradiated group.

Conclusions:

A functional nude mouse model for photoaging research has been successfully developed.
This model is suitable for investigating the mechanisms and potential treatments of skin photoaging.