Upregulation of the gluconeogenesis pathway was observed by KDH1, mitigating glucose catabolite repression.

Unlabelled: was engineered to mitigate carbon catabolite repression to efficient co-fermenting mixed sugars, which are primary components of cellulosic biomass. KDH1 produced ethanol with 0.42 ± 0.

A facile approach to microplastic identification and quantification using differential scanning calorimetry.

The ubiquity of microplastics (MP) in aquatic environments has been raising concerns. Although the μ-Fourier transform infrared spectroscopy (μ-FTIR) technique is commonly used to detect MPs, it is an expensive and time-consuming process that requires expert operation. Moreover, the mass concentration of MPs cannot be determined, thereby necessitating the development of an inexpensive and simple analytical technique for identifying and quantifying MPs in aquatic environments using thermal-based technologies.

Application of metal-organic frameworks for photocatalytic degradation of microplastics: Design, challenges, and scope.

Microplastics (MPs), plastic particles smaller than 5 mm, are pervasive pollutants challenging wastewater treatment due to their size and hydrophobicity. They infiltrate freshwater, marine, and soil environments, posing ecological threats. In marine settings, MPs ingested by organisms cause cytokine release, cellular and DNA damage, and inflammation.

Assessing the abundance, sources, and potential ecological risk assessment of microplastics using their particle and mass units in Uiam Lake, South Korea.

Microplastics (MPs) enter lakes through various pathways, including effluents from wastewater treatment plants (WWTPs), surface runoff, and improperly disposed of plastic waste. In this study, the extent of MPs pollution in Uiam Lake in fall of 2022 and spring of 2023 was assessed by determining both the number (n/m) and mass concentrations (μg/m) of MPs. Moreover, the correlation between water quality parameters and MP properties was analyzed, and an ecological risk assessment was conducted.

Water quality seasonal variation assessment of the Gongji and Yaksa streams, Chuncheon, South Korea.

Gongji Stream flows into Lake Uiam, a potable water source for the capital region of Chuncheon, South Korea. Algal blooms often occur downstream of the Gongji stream in combination with drastic flow rate variations. Downstream water quality may also be affected by Yaksa stream.

Overexpression of Mutant Galactose Permease (_N376F) Effective for Utilization of Glucose/Xylose or Glucose/ Galactose Mixture by Engineered .

Mutant sugar transporter -N376F was overexpressed in for efficient utilization of xylose, which is one of the main components of cellulosic biomass. ScGal2_N376F, the -N376F-overexpressing strain, exhibited 47.04 g/l of xylose consumption and 26.

Overexpression of Endogenous Xylose Reductase Enhanced Xylitol Productivity at 40 °C by Thermotolerant Yeast Kluyveromyces marxianus.

Xylitol is a valuable substance utilized by food and biochemical industries. NAD(P)H-dependent xylose reductase (XR)-encoded by the yeast KmXYL1 gene-is the key enzyme which facilitates reduction of xylose to xylitol. Multi-copy integration of a mutant KmXYL1 (mKmXYL1) gene was carried out using thermotolerant yeast Kluyveromyces marxianus KCTC17555ΔURA3, in order to enhance xylitol production.

Alleviation of catabolite repression in : the thermotolerant SBK1 mutant simultaneously coferments glucose and xylose.

Background: Simultaneous cofermentation of glucose and xylose mixtures would be a cost-effective solution for the conversion of cellulosic biomass to high-value products. However, most yeasts ferment glucose and xylose sequentially due to glucose catabolite repression. A well known thermotolerant yeast, , was selected for this work because it possesses cost-effective advantages over for biofuel production from cellulosic biomass.

Ethanol production from xylose is highly increased by the Kluyveromyces marxianus mutant 17694-DH1.

Directed evolutionary approach and random mutagenesis were performed on thermotolerant yeast Kluyveromyces marxianus KCTC17694 for isolating a yeast strain producing ethanol from xylose efficiently. The isolated mutant strain, K. marxianus 17694-DH1, showed 290% and 131% improvement in ethanol concentration and ethanol production yield from xylose, respectively, as compared with the parental strain.

Changes in antioxidant activities and volatile compounds of mixed berry juice through fermentation by lactic acid bacteria.

The objectives of this study were to analyze antioxidant activities and identify volatile compounds in mixed berry juice after fermentation by lactic acid bacteria (LAB). Antioxidant activity of the mixed berry juice increased significantly from 209.57±2.

Effects of polysaccharides isolated from Inonotus obliquus against hydrogen peroxide-induced oxidative damage in RINm5F pancreatic β-cells.

The purpose of the present study was to elucidate the cytoprotective effects of polysaccharides isolated from Inonotus obliquus. The polysaccharides were extracted from the fruiting body of I. obliquus (PFIO) and the liquid culture broth of I.

Polysaccharide isolated from the liquid culture broth of Inonotus obliquus suppresses invasion of B16-F10 melanoma cells via AKT/NF-κB signaling pathway.

A number of polysaccharides exhibit pharmacological activities. Polysaccharides derived from Inonotus obliquus (PLIO) appear to have various potential pharmacological properties, including anti‑tumor activity. However, the molecular mechanisms underlying these properties remain to be elucidated.

Cytoprotective effect of hispidin against palmitate-induced lipotoxicity in C2C12 myotubes.

It is well known that Phellinus linteus, which produces hispidin and its derivatives, possesses antioxidant activities. In this study, we investigated whether hispidin has protective effects on palmitate-induced oxidative stress in C2C12 skeletal muscle cells. Our results showed that palmitate treatment in C2C12 myotubes increased ROS generation and cell death as compared with the control.

Mechanism of macrophage activation induced by polysaccharide from Cordyceps militaris culture broth.

Mushroom-derived polysaccharides have been shown to stimulate immune responses. Our previous report showed that the novel polysaccharide PLCM isolated from the culture broth of Cordyceps militaris could induce nitric oxide production in the murine macrophage-like cell line RAW264.7.

Cyanidin-3-glucoside isolated from mulberry fruit protects pancreatic β-cells against oxidative stress-induced apoptosis.

The extract obtained from berries contains high amounts of anthocyanins, and this extract is used as a phytotherapeutic agent for different types of diseases. In this study, we examined the cytoprotective effects of cyanidin-3-glucoside (C3G) isolated from mulberry fruit against pancreatic β-cell apoptosis caused by hydrogen peroxide (H2O2)-induced oxidative stress. The MIN6 pancreatic β-cells were used to investigate the cytoprotective effects of C3G on the oxidative stress-induced apoptosis of cells.

Inonotus obliquus-derived polysaccharide inhibits the migration and invasion of human non-small cell lung carcinoma cells via suppression of MMP-2 and MMP-9.

Polysaccharides isolated from the fruiting body of Inonotus obliquus (PFIO) are known to possess various pharmacological properties including antitumor activity. However, the anti-metastatic effect and its underlying mechanistic signaling pathway involved these polysaccharides in human non-small cell lung carcinoma remain unknown. The present study therefore aimed to determine the anti-metastatic potential and signaling pathways of PFIO in the highly metastatic A549 cells.

Cordyceps militaris extract protects human dermal fibroblasts against oxidative stress-induced apoptosis and premature senescence.

Oxidative stress induced by reactive oxygen species (ROS) is the major cause of degenerative disorders including aging and disease. In this study, we investigated whether Cordyceps militaris extract (CME) has in vitro protective effects on hydrogen peroxide-induced oxidative stress in human dermal fibroblasts (HDFs). Our results showed that the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of CME was increased in a dose-dependent manner.

Mulberry fruit extract protects pancreatic β-cells against hydrogen peroxide-induced apoptosis via antioxidative activity.

Among the many environmental stresses, excessive production of reactive oxygen species (ROS) and the ensuring oxidative stress are known to cause significant cellular damage. This has clinical implications in the onset of type 1 diabetes, which is triggered by the destruction of pancreatic β-cells and is associated with oxidative stress. In this study, we investigated the protective and antioxidative effects of mulberry extract (ME) in insulin-producing pancreatic β-cells.

Overcoming inefficient cellobiose fermentation by cellobiose phosphorylase in the presence of xylose.

Background: Cellobiose and xylose co-fermentation holds promise for efficiently producing biofuels from plant biomass. Cellobiose phosphorylase (CBP), an intracellular enzyme generally found in anaerobic bacteria, cleaves cellobiose to glucose and glucose-1-phosphate, providing energetic advantages under the anaerobic conditions required for large-scale biofuel production. However, the efficiency of CBP to cleave cellobiose in the presence of xylose is unknown.

A biosynthetic pathway for hexanoic acid production in Kluyveromyces marxianus.

Hexanoic acid can be used for diverse industrial applications and is a precursor for fine chemistry. Although some natural microorganisms have been screened and evolved to produce hexanoic acid, the construction of an engineered biosynthetic pathway for producing hexanoic acid in yeast has not been reported. Here we constructed hexanoic acid pathways in Kluyveromyces marxianus by integrating 5 combinations of seven genes (AtoB, BktB, Crt, Hbd, MCT1, Ter, and TES1), by which random chromosomal sites of the strain are overwritten by the new genes from bacteria and yeast.

Continuous co-fermentation of cellobiose and xylose by engineered Saccharomyces cerevisiae.

Simultaneous fermentation of cellobiose and xylose by an engineered Saccharomyces cerevisiae has been demonstrated in batch fermentation, suggesting the feasibility of continuous co-fermentation of cellulosic sugars. As industrial S. cerevisiae strains have known to possess higher ethanol productivity and robustness compared to laboratory S.