Antioxidant extracellular polysaccharide EPS from marine-derived Limosilactobacillus fermentum LAN4 potential to against inflammation by inhibiting MAPK/NF-κB signaling pathway.

Marine microorganisms have unique metabolic pathways due to their unique living environment, which enables them to produce many structurally special and highly active active substances. They are considered the most promising treasure trove of active substances for development. In this study, EPS was the extracellular polysaccharide (EPS) extracted from LAN4 which was identified as Limosilactobacillus fermentum isolated from seawater, sea mud, mangrove leaves, and soil.

Mechanisms of Antitumor Invasion and Metastasis of the Marine Fungal Derivative Epi-Aszonalenin A in HT1080 Cells.

Epi-aszonalenin A (EAA) is an alkaloid that is isolated and purified from the secondary metabolites of coral symbiotic fungi and has been shown to have good atherosclerotic intervention activity and anti-angiogenic activity in our previous studies. In the present study, antiangiogenic activity was used as a basis of an intensive study of its mechanism of action against tumor metastasis and invasion. Invasive metastatic pairs are a hallmark of malignancy, and the dissemination of tumor cells is the most dangerous process in the development of tumors.

Comparative and study of the stability and biological activity of an octapeptide from microalgae and its truncated short peptide.

In this study, the structural characteristics and active sites of the octapeptide (IIAVEAGC), the pentapeptide (IIAVE) and tripeptide (AGC) were studied and . The quantum mechanics results show that the pentapeptide has better structural features. In addition, the docking of three peptides with Keap1 was compared through molecular docking, indicating that the potential molecular mechanism may show antioxidant activity by occupying the Nrf2 binding site on Keap1.

Mechanism analysis of octapeptide from microalgae, Isochrysis zhanjiangensis for suppressing vascular injury and angiogenesis in human umbilical vein endothelial cell.

Incorporating microalgae active peptides into functional foods is one of the hottest topics in algae research. Ile-Ile-Ala-Val-Glu-Ala-Gly-Cys (IEC) is a novel octapeptide isolated from the microalgae, Isochrysis Zhanjiangensis that inhibits the vascular injury, angiogenesis and has a protective effect on cardiovascular diseases. In this study, IEC can suppress ROS production and inhibit pro-inflammatory factors through the Nrf2/SOD/HO-1 and NF-κB signaling pathways.

A Sulfated Polysaccharide from Red Algae () to Suppress Cells Metastasis and MMP-9 Expression of HT1080 Cells.

Sulfated polysaccharides from red algae have a variety of biological activities, especially antitumor activities. Matrix metalloproteinase-9 (MMP-9) is a proteolytic metalloenzyme that degrades the central part of the extracellular matrix (ECM) and promotes tumor metastasis. In this research, we have investigated the influence and mechanism of GNP (sulfated polysaccharide from ) on tumor metastasis and MMP-9 expression of human fibrosarcoma (HT1080) cells.

Potential anti-skin aging effect of a peptide AYAPE isolated from Isochrysis zhanjiangensis on UVB-induced HaCaT cells and HO-induced BJ cells.

AYAPE (Ala-Tyr-Ala-Pro-Glu) is a pentapeptide isolated from Isochrysis zhanjiangensis, previous studies have proved that this pentapeptide has antioxidant and inflammatory activities. In this study, we determined the anti-skin aging bioactivity of AYAPE with UVB-induced human immortalized keratinocytes (HaCaT) and HO-induced human skin fibroblasts (BJ cells) as models. The results showed that AYAPE against UVB-induced photoaging on HaCaT cells via alleviating DNA damage, reducing intracellular reactive oxygen (ROS) levels, down regulating phosphorylation of proteins in MAPK/AP-1 signaling pathways.

Efficacy and safety of raltitrexed plus S-1 regorafenib in patients with refractory metastatic colorectal cancer: a real-world propensity score matching study.

Background: Raltitrexed plus S-1 (RS) and regorafenib both showed considerable efficacy for metastatic colorectal cancer (mCRC) patients. This study aims to compare the effectiveness and safety of two different regimens in patients with refractory mCRC.

Methods: This retrospective cohort study included mCRC patients who were treated with RS or regorafenib from February 2017 to June 2021.

A Phlorotanin, 6,6'-bieckol from Ecklonia cava, Against Photoaging by Inhibiting MMP-1, -3 and -9 Expression on UVB-induced HaCaT Keratinocytes.

Skin is the outmost layer of human and sustains most of the external UVB irradiation, which possibly causes the skin photoaging. As a natural antioxidant, marine natural products have been paid more and more attention to their positive effects on photoaging. 6,6'-bieckol is a phlorotanin isolated from Ecklonia cava, while its antiphotoaging bioactivity and mechanism have not been clear yet.

Heptapeptide Isolated from Exhibited Anti-Photoaging Potential via MAPK/AP-1/MMP Pathway and Anti-Apoptosis in UVB-Irradiated HaCaT Cells.

Marine microalgae can be used as sustainable protein sources in many fields with positive effects on human and animal health. DAPTMGY is a heptapeptide isolated from which is a microalga. In this study, we evaluated its anti-photoaging properties and mechanism of action in human immortalized keratinocytes cells (HaCaT).

Novel insight from the first lung transplant of a COVID-19 patient.

Background: To reveal detailed histopathological changes, virus distributions, immunologic properties and multi-omic features caused by SARS-CoV-2 in the explanted lungs from the world's first successful lung transplantation of a COVID-19 patient.

Materials And Methods: A total of 36 samples were collected from the lungs. Histopathological features and virus distribution were observed by optical microscope and transmission electron microscope (TEM).