Publications by authors named "Mei Jing Piao"

Connecting peptide (C-peptide), a byproduct of insulin biosynthesis, has diverse cellular and biological functions. Particulate matter 2.5 (PM) adversely affects human skin, leading to skin thickening, wrinkle formation, skin aging, and inflammation.

View Article and Find Full Text PDF

Background: Butin is a naturally occurring compound with a wide range of medicinal properties, including anti-inflammatory, anti-arthritic, and antioxidant properties. Particulate matter 2.5 (PM) and ultraviolet B (UVB) radiation contribute to skin cell damage via the induction of oxidative stress.

View Article and Find Full Text PDF

Shikonin, an herbal naphthoquinone, demonstrates a broad spectrum of pharmacological properties. Owing to increasingly adverse environmental conditions, human skin is vulnerable to harmful influences from dust particles. This study explored the antioxidant capabilities of shikonin and its ability to protect human keratinocytes from oxidative stress induced by fine particulate matter (PM).

View Article and Find Full Text PDF

Exposure to fine particulate matter with an aerodynamic diameter of less than 2.5 μm (PM) can cause oxidative damage and apoptosis in the human skin. Chlorogenic acid (CGA) is a bioactive polyphenolic compound with antioxidant, antifungal, and antiviral properties.

View Article and Find Full Text PDF

Specific sensitivity of the skin to ultraviolet B (UVB) rays is one of the mechanisms responsible for widespread skin damage. This study tested whether 1,3,5-trihydroxybenzene (THB), a compound abundant in marine products, might inhibit UVB radiation-induced NADPH oxidase 4 (NOX4) in both human HaCaT keratinocytes and mouse dorsal skin and explore its cytoprotective mechanism. The mechanism of action was determined using western blotting, immunocytochemistry, NADP/NADPH assay, reactive oxygen species (ROS) detection, and cell viability assay.

View Article and Find Full Text PDF
Article Synopsis
  • Particulate matter 2.5 (PM) can harm your skin by causing aging and inflammation.
  • Hyperoside, a compound found in some plants, helps protect skin cells from damage caused by PM.
  • The study showed that hyperoside can improve skin cell growth and reduce stress and aging effects caused by exposure to harmful pollutants.
View Article and Find Full Text PDF

Particulate matter 2.5 (PM) imposes a heavy burden on the skin and respiratory system of human beings, causing side effects such as aging, inflammation and cancer. Astaxanthin (ATX) is a well-known antioxidant widely used for its anti-inflammatory and anti-aging properties.

View Article and Find Full Text PDF

Physiological stress such as excessive reactive oxygen species (ROS) production may contribute normal fibroblasts activation into cancer‑associated fibroblasts, which serve a crucial role in certain types of cancer such as pancreatic, breast, liver and lung cancer. The present study aimed to examine the cytoprotective effects of luteolin (3',4',5,7‑tetrahydroxyflavone) against hydrogen peroxide (HO)‑generated oxidative stress in lung fibroblasts. To examine the effects of luteolin against HO‑induced damages, cell viability, sub‑G cell population, nuclear staining with Hoechst 33342, lipid peroxidation and comet assays were performed.

View Article and Find Full Text PDF

This study investigated the mechanism of silver nanoparticle (AgNP) cytotoxicity from a mitochondrial perspective. The effect of AgNP on manganese superoxide dismutase (MnSOD), a mitochondrial antioxidant enzyme, against oxidative stress has not been studied in detail. We demonstrated that AgNP decreased MnSOD mRNA level, protein expression, and activity in human Chang liver cells in a time-dependent manner.

View Article and Find Full Text PDF

Runt domain transcription factor 3 (RUNX3) suppresses many different cancer types and is disabled by mutations, epigenetic repression, or cytoplasmic mislocalization. In this study, we investigated whether oxidative stress is associated with RUNX3 accumulation from the nucleus to the cytoplasm in terms of histone modification. Oxidative stress elevated histone deacetylase (HDAC) level and lowered that of histone acetyltransferase.

View Article and Find Full Text PDF

Particulate matter 2.5 (PM) poses a serious threat to human health and is responsible for respiratory disorders, cardiovascular diseases, and skin disorders. 3-Bromo-4,5-dihydroxybenzaldehyde (3-BDB), abundant in marine red algae, exhibits anti-inflammatory, antioxidant, and antidiabetic activities.

View Article and Find Full Text PDF

The skin is directly exposed to atmospheric pollutants, especially particulate matter 2.5 (PM) in the air, which poses significant harm to skin health. However, limited research has been performed to identify molecules that can confer resistance to such substances.

View Article and Find Full Text PDF

The exposure of the human skin to particulate matter 2.5 (PM) results in adverse health outcomes, such as skin aging, wrinkle formation, pigment spots, and atopic dermatitis. It has previously been shown that rosmarinic acid (RA) can protect keratinocytes from ultraviolet B radiation by enhancing cellular antioxidant systems and reducing oxidative damage; however, its protective action against the adverse effects of PM on skin cells remains unclear.

View Article and Find Full Text PDF
Article Synopsis
  • Particulate matter (PM) can make skin cells called keratinocytes produce reactive oxygen species (ROS), which are harmful molecules that can damage cells.!* -
  • The study found that this ROS production happens through a system involving specific proteins called NOX1, NOX4, and DUOX1, as well as calcium signaling.!* -
  • The particles also interact with a receptor called AhR, which helps turn on the genes for NOX1 and DUOX1, leading to more ROS being made in skin cells.!*
View Article and Find Full Text PDF

Background/aim: Melanoma is a prevalent malignant tumor that arises from melanocytes. The treatment of malignant melanoma has become challenging due to the development of drug resistance. It is, therefore, imperative to identify novel therapeutic drug candidates for controlling malignant melanoma.

View Article and Find Full Text PDF

Rosmarinic acid (RA) is a phenolic ester that protects human keratinocytes against oxidative damage induced by ultraviolet B (UVB) exposure, however, the mechanisms underlying its effects remain unclear. This study aimed to elucidate the cell signaling mechanisms that regulate the antioxidant activity of RA and confirm its cyto-protective role. To explore the signaling mechanisms, we used the human keratinocyte cell line HaCaT and SKH1 hairless mouse skin.

View Article and Find Full Text PDF

Skin is a direct target of fine particulate matter (PM), as it is constantly exposed. Herein, we investigate whether Korean red ginseng (KRG) can inhibit PM-induced senescence in skin keratinocytes. PM-treated human keratinocyte cell lines and normal human epidermal keratinocytes showed characteristics of cellular senescence, including flat and enlarged forms; however, KRG suppressed them in both cell types.

View Article and Find Full Text PDF

Excessive UVB exposure causes development of both malignant and non-malignant melanoma via the secretion of α-melanocyte-stimulating hormone (α-MSH). We investigated whether baicalein (5,6,7-trihydroxyflavone) could inhibit α-MSH-stimulated melanogenesis. Baicalein prevented UVB- and α-MSH-induced melanin production and attenuated α-MSH-stimulated tyrosinase (monophenol monooxygenase) activity, and expression of tyrosinase and tyrosine-related protein-2.

View Article and Find Full Text PDF

Cellular senescence can be activated by several stimuli, including ultraviolet radiation and air pollutants. This study aimed to evaluate the protective effect of marine algae compound 3-bromo-4,5-dihydroxybenzaldehyde (3-BDB) on particulate matter 2.5 (PM)-induced skin cell damage in vitro and in vivo.

View Article and Find Full Text PDF

Neurodegenerative diseases are associated with neuronal cell death through apoptosis. Apoptosis is tightly associated with the overproduction of reactive oxygen species (ROS), and high glucose levels contribute to higher oxidative stress in diabetic patients. Hesperidin, a natural active compound, has been reported to scavenge free radicals.

View Article and Find Full Text PDF

Ginseng ( Meyer) has been used in East Asian traditional medicine for a long time. Korean red ginseng (KRG) is effective against several disorders, including cancer. The cytotoxic effects of KRG extract in terms of autophagy- and apoptosis-mediated cell death and its mechanisms were investigated using human colorectal cancer lines.

View Article and Find Full Text PDF

Particulate matter 2.5 (PM) exposure can trigger adverse health outcomes in the human skin, such as skin aging, wrinkles, pigment spots, and atopic dermatitis. PM is associated with mitochondrial damage and the generation of reactive oxygen species (ROS).

View Article and Find Full Text PDF

Numerous epidemiological studies have reported that particulate matter 2.5 (PM) causes skin aging and skin inflammation and impairs skin homeostasis. Hesperidin, a bioflavonoid that is abundant in citrus species, reportedly has anti-inflammatory properties.

View Article and Find Full Text PDF

Few studies have evaluated the role of autophagy in the development of oxaliplatin (OXT) resistance in colon cancer cells. In this study, we compared the role of autophagy between SNU-C5 colon cancer cells and OXT-resistant SNU-C5 (SNU-C5/OXTR) cells. At the same concentration of OXT, the cytotoxicity of OXT or apoptosis was significantly reduced in SNU-C5/OXTR cells compared with that in SNU-C5 cells.

View Article and Find Full Text PDF