1 Photoaging occurs over a period of years.

2 NS398 can prevent mice's skin photoaging. It will provide a new way to prevent skin photoaging.

3 Conclusion Wrinkle formation in photoaging skin after PUVA therapy is correlated with the imbalance of expression of matrix metalloproteinases and their inhibitors of dermal fibroblasts.

4 Conclusion NS398 can prevent mice's skin photoaging. It may provide a new way to prevent skin photoaging.

5 Objective To investigate the relationships between skin photoaging and point mutations in mitochondrial DNA (mtDNA) control region for replication of dermal fibroblast.

6 ObjectiveTo investigate the feasibility of establishing skin photoaging model of human dermal fibroblasts with 8-MOP/UVA treatment.

7 Photoaging was a result of long-term ultraviolet accumulation and UVB could also produce a marked effect although its quantity was less than UVA into dermis.

8 Photoaging refers to cutaneous damage caused by light, especially ultraviolet radiation exposure, in the process of skin aging.

9 With further understanding of photoaging, many corresponding developments have been made in its prevention and treatment approaches.

10 Objective:To study the effects of cordyceps polysaccharides (CP) on fibroblasts collagens in photoaging skin.

11 Thus it is necessary to prevent and treat skin photoaging.

12 Objective To observe the non-ablative treatment effect on facial photoaging with combined intense pulsed light (IPL) and HGM laser.

13 Preventive and curative effects of tea polyphenols and tea pigments on skin photoaging of mice were dose dependent.

14 Objective:To investigate the antagonism of oral retinoids to skin photoaging induced by photochemotherapy with psoralnes and ultraviolet A(PUVA)and its possible mechanism.

15 As noted,(www.Sentencedict.com) treatment with topical fluorouracil improved actinic keratoses and photoaging and most patients said they were willing to undergo treatment again.

16 The results of numerical simulation show the lesion of photoaging skin can be selectively damaged if the wavelength, exposure duration and exposure dose of irradiated ligh are reasonably selected.

17 People who live in sun-intense areas, such as Florida or Arizona, can show signs of photoaging in their 20s.

18 With the time of being in the army and cumulative sun-exposure period, the prevalence of tanning, photoaging and polymorphous light eruption increased, while the prevalence of sunburn decreased.

19 Differences exist in the quantity, morphology and function of dendritic cells as well as the content of cytokines between photoaging skin and chronologically aging skin.

20 Ultraviolet radiation may result in skin changes, such as erythema, photoaging.