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Objectives: Skin barrier disruption is a significant problem of the older population in an aging society. It is characterized by increased transepidermal water loss and decreased skin water content, and particulate matter (PM) is a social issue that can contribute to the exacerbation of skin inflammation. Thus, addressing this problem is urgent. Methods: Skin barrier‐disrupted mouse models were induced by two methods using acetone application or tape‐stripping. This study investigated the antioxidative and anti‐inflammatory properties of the Siegesbeckia herba extract (SHE) on PM‐induced changes in skin barrier‐disrupted mouse models. To examine changes in skin water content, inflammatory cytokines, and keratinocyte differentiation markers, mouse models were treated with vehicle 100 μL, PM10 100 μL (100 μg/mL), SHE 100 μL, or PM10 100 μL (100 μg/mL) plus SHE 100 μL. Results: SHE preserved skin hydration in the skin barrier‐disrupted mouse models regardless of the presence of PM10. SHE also inhibited the upregulation of inflammatory cytokines such as interleukin (IL)‐1β, IL‐4, IL‐6, IL‐8, and tumor necrosis factor‐α and normalized the downregulation of keratinocyte differentiation markers against PM10 in skin barrier‐disrupted mouse models. Conclusions: This study elucidated the therapeutic effects of SHE against PM10 in skin barrier‐disrupted mouse models. [ABSTRACT FROM AUTHOR]

Background: The tumor, nodes and metastasis (TNM) classification and stage grouping have been updated in the 8th edition of the American Joint Committee on Cancer (AJCC) melanoma staging manual. However, restaging all the previous cases are not recommended.Aims: The aims of the study were to investigate the necessity of restaging Korean melanoma patients staged by the previous edition of the AJCC manual.Methods: Differences in the staging criteria of the 7th and 8th editions of the AJCC manual were identified. The staging of 276 primary melanomas from January 2011 to December 2018 was classified by both 7th and 8th editions of the manual and their differences were compared.Results: Staging by 7th and 8th edition of the AJCC manual differed in 64 cases (23.2%). The pathological prognostic staging changed in 35 (12.7%), and 29 (10.5%) had changes in only TNM classification but not the pathological staging. None of the patients needed additional sentinel lymph node biopsy or systemic treatment as a result of restaging. Additional counseling was needed for the patients, because melanoma-specific survival was increased in the 8th edition.Limitations: This is a retrospective study with relatively small number of patients at a single tertiary center in Korea.Conclusion: Assessment of the need for additional sentinel lymph node biopsy or systemic treatment is recommended because of the latest changes in the AJCC melanoma staging manual. Although the restaging of previously staged melanomas is not significantly needed in our patients, still the differences in TNM classification and/or pathological prognostic staging suggest the need to separately recognize the patients previously staged by 7th edition and recently staged by 8th edition. Careful counseling about melanoma-specific survival is needed for Asian patients. [ABSTRACT FROM AUTHOR]

Objectives: Skin barrier disruption is a significant problem of the older population in an aging society. It is characterized by increased transepidermal water loss and decreased skin water content, and particulate matter (PM) is a social issue that can contribute to the exacerbation of skin inflammation. Thus, addressing this problem is urgent., Methods: Skin barrier-disrupted mouse models were induced by two methods using acetone application or tape-stripping. This study investigated the antioxidative and anti-inflammatory properties of the Siegesbeckia herba extract (SHE) on PM-induced changes in skin barrier-disrupted mouse models. To examine changes in skin water content, inflammatory cytokines, and keratinocyte differentiation markers, mouse models were treated with vehicle 100 μL, PM 10 100 μL (100 μg/mL), SHE 100 μL, or PM 10 100 μL (100 μg/mL) plus SHE 100 μL., Results: SHE preserved skin hydration in the skin barrier-disrupted mouse models regardless of the presence of PM 10 . SHE also inhibited the upregulation of inflammatory cytokines such as interleukin (IL)-1β, IL-4, IL-6, IL-8, and tumor necrosis factor-α and normalized the downregulation of keratinocyte differentiation markers against PM 10 in skin barrier-disrupted mouse models., Conclusions: This study elucidated the therapeutic effects of SHE against PM 10 in skin barrier-disrupted mouse models., (© 2024 The Authors. Skin Research and Technology published by John Wiley & Sons Ltd.)

Background: The tumor, nodes and metastasis (TNM) classification and stage grouping have been updated in the 8th edition of the American Joint Committee on Cancer (AJCC) melanoma staging manual. However, restaging all the previous cases are not recommended., Aims: The aims of the study were to investigate the necessity of restaging Korean melanoma patients staged by the previous edition of the AJCC manual., Methods: Differences in the staging criteria of the 7th and 8th editions of the AJCC manual were identified. The staging of 276 primary melanomas from January 2011 to December 2018 was classified by both 7th and 8th editions of the manual and their differences were compared., Results: Staging by 7th and 8th edition of the AJCC manual differed in 64 cases (23.2%). The pathological prognostic staging changed in 35 (12.7%), and 29 (10.5%) had changes in only TNM classification but not the pathological staging. None of the patients needed additional sentinel lymph node biopsy or systemic treatment as a result of restaging. Additional counseling was needed for the patients, because melanoma-specific survival was increased in the 8th edition., Limitations: This is a retrospective study with relatively small number of patients at a single tertiary center in Korea., Conclusion: Assessment of the need for additional sentinel lymph node biopsy or systemic treatment is recommended because of the latest changes in the AJCC melanoma staging manual. Although the restaging of previously staged melanomas is not significantly needed in our patients, still the differences in TNM classification and/or pathological prognostic staging suggest the need to separately recognize the patients previously staged by 7th edition and recently staged by 8th edition. Careful counseling about melanoma-specific survival is needed for Asian patients.