Intense pulsed light in photoaging: a clinical, histopathological and immunohistochemical evaluation.

Abstract:

BACKGROUND:Intense pulsed light has been used in the treatment of photoaging without a full understanding of its mechanism of action. OBJECTIVE:To study the effect of intense pulsed light on photoaging and on the skin immune response by means of a clinical and histopathological study, evaluating Langerhans cells (CD1), expression of intercellular adhesion molecule, of CD4 and CD8 lymphocytes and quantification of collagen and elastic fibers. METHODS:In 2006 a total of 26 patients, aged 40 to 65 years, with phototypes II to III (Fitzpatrick scale), were treated for photoaging using intense pulsed light in five sessions with a monthly interval. All the patients were subjected to histological and immunohistochemical evaluation 6 months after treatment. RESULTS:At the end of the treatment clinical improvement was observed in 76.92% of cases. This improvement was associated to a significant increase of collagen (51.33%) and elastic (44.13%) fibers. Intense pulsed light treatment led to a reduction of CD4 lymphocytes and did not alter the amount of CD8 lymphocytes. It also led to a significant increase of small, nonectatic blood vessels, positive intercellular adhesion molecule. CONCLUSION:Facial treatment with intense pulsed light promoted major clinical improvement that was confirmed by histological examination of the skin. This technique is a good treatment option for skin photoaging because it is non-ablative, safe and effective.

journal_name

An Bras Dermatol

authors

Patriota RC,Rodrigues CJ,Cucé LC

doi

10.1590/s0365-05962011000600010

subject

Has Abstract

pub_date

2011-11-01 00:00:00

pages

1129-33

issue

6

eissn

0365-0596

issn

1806-4841

pii

S0365-05962011000600010

journal_volume

86

pub_type

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