Both modalities have good effects on treating atrophic scars. PIH was not seen with the fractional microplasma RF, which might make it a better choice for patients with darker skin.

We propose a new topological quantum state of matter-the two-dimensional (2D) Weyl half semimetal (WHS), which features 2D Weyl points at Fermi level belonging to a single spin channel, such that the low-energy electrons are described by fully spin-polarized 2D Weyl fermions. We predict its realization in the ground state of monolayer PtCl3. We show that the material is a half metal with an in-plane magnetization, and its Fermi surface consists of a pair of fully spin-polarized Weyl points protected by a mirror symmetry, which are robust against spin-orbit coupling. Remarkably, we show that the WHS state is a critical state at the topological phase transition between two quantum anomalous Hall insulator phases with opposite Chern numbers, such that a switching between quantum anomalous Hall states can be readily achieved by rotating the magnetization direction. Our findings demonstrate that WHS offers new opportunity to control the chiral edge channels, which will be useful for designing new topological electronic devices.

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MFRS is an effective method to improve skin laxity. Thermal lesion approach seems to provide better outcomes when applied to deep dermal layers. It is necessary to consider the skin thickness of different facial regions when choosing the treatment depth.

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Research on tumour cell-derived small extracellular vesicles (sEVs) that regulate tumour microenvironment (TME) has provided strategies for targeted therapy of head and neck squamous cell carcinoma (HNSCC). Herein, we demonstrated that sEVs derived from HNSCC cancer cells carried CD73 (sEVs CD73 ), which promoted malignant progression and mediated immune evasion. The sEVs CD73 phagocytosed by tumour-associated macrophages (TAMs) in the TME induced immunosuppression. Higher CD73 high TAMs infiltration levels in the HNSCC microenvironment were correlated with poorer prognosis, while sEVs CD73 activated the NF-κB pathway in TAMs, thereby inhibiting immune function by increasing cytokines secretion such as IL-6, IL-10, TNF-α, and TGF-β1. The absence of sEVs CD73 enhanced the sensitivity of anti-PD-1 therapy through reversed immunosuppression. Moreover, circulating sEVs CD73 increased the risk of lymph node metastasis and worse prognosis. Taken together, our study suggests that sEVs CD73 derived from tumour cells contributes to immunosuppression and is a potential predictor of anti-PD-1 responses for immune checkpoint therapy in HNSCC. K E Y WO R D Santi-PD-1 therapy, CD73, head and heck squamous cell carcinoma, macrophage, small extracellular vesicle

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