Unleashing the potential of biotechnological strategies for the sustainable production of microalgal polysaccharides.

The prevailing trend toward the increased application of natural polysaccharides in the food, cosmetics, and pharmaceutical sectors has provided the impetus for exploring sustainable biological feedstocks. Amongst them, photoautotrophic microalgae have garnered huge research and commercial interests for polysaccharide production by photosynthesis, thereby concurrently attaining carbon sequestration and green production of valuable metabolites. However, conventional approaches for enhancing polysaccharide accumulation warrant adverse conditions, which in turn hinder cellular growth and productivity.

Physiological responses and adaptive mechanisms of the harmful algal bloom species Heterosigma akashiwo to naphthalene exposure.

Polycyclic aromatic hydrocarbons (PAHs), especially naphthalene (Nap), pose a significant threat to coastal ecosystems and may contribute to the occurrence of harmful algal blooms (HABs). However, the response mechanisms of HAB species to PAH pollution remain unclear. This study investigated the physiological and molecular responses of the HAB species Heterosigma akashiwo to varying Nap concentrations.

[Clinical efficacy analysis of PACS preoperative planning in percutaneous vertebroplasty for the treatment of osteoporotic vertebral compression fractures in the elderly].

Objective: To explore the clinical effect of personalized puncture planning before surgery using Picture Archiving and Communication System (PACS) in the treatment of osteoporotic vertebral compression fractures in the elderly.

Methods: A total of 69 elderly patients with osteoporotic vertebral compression fractures treated by percutaneous vertebroplasty from January 2020 20 to December 2021 with more than 1 year of follow-up were analyzed retrospectively. Thirty-four patients were individualized for preoperative planning with PACS software (observation group), including 8 males and 26 females, with a mean age of (73.

Unveiling novel oxygen-dependent docosahexaenoic acid biosynthesis pathway in Crypthecodinium cohnii via dual-function △4-fatty acid desaturases.

Crypthecodinium cohnii, a protist renowned for its high docosahexaenoic acid (DHA) production, has an unclear mechanism for converting docosapentaenoic acid (DPA) into DHA. This study employed transcriptomic analysis to investigate the effect of excessive oxygen limitation (EOL) on DHA biosynthesis, uncovering a novel oxygen-dependent pathway. The use of intermittent oxygen limitation (IOL) strategy significantly boosted DHA production.

A dual-reactivity-based surface-enhanced Raman spectroscopy nanosensor for the simultaneous imaging of hypochlorite and nitric oxide in living cells.

A surface-enhanced Raman spectroscopy (SERS) nanosensor with dual-reactivity is developed for the simultaneous imaging of hypochlorite (ClO) and nitric oxide (NO) in living cells. Utilizing the specific reactions between functional molecules and ClO and NO, respectively, the 2-mercapto-4-methoxy-phenol (2-MP) and o-phenylenediamine (OPD) molecules are synchronously assembled on the surface of gold nanoparticles to fabricate the dual-function nanosensors. The advantages of SERS technology, narrow peaks for spectral multiplexing and fingerprint information, further facilitate the simultaneous detection of ClO and NO.

Uptake, translocation, and biotransformation of phthalate acid esters in crop plants: A comprehensive review.

Phthalate acid esters (PAEs) are prevalent emerging contaminants in agricultural environments. The uptake of PAEs by crop plants has attracted extensive attention due to the risks posed to human health through transfer in food chains. Despite its importance, the interaction between PAEs and crop plants remains poorly understood.

Comparison of oxycodone hydrochloride and flurbiprofen axetil on analgesia in mechanically ventilated patients with respiratory failure in a multicenter study.

The design of this study is to compare the effectiveness of two analgesic drugs in the intervention of pain events for patients on mechanical ventilation. 414 patients from three hospitals with respiratory failure requiring mechanical ventilation were randomly assigned to oxycodone hydrochloride or flurbiprofen axetil. The primary endpoints is the difference in the proportion of patients with a Behavioral Pain Scale (BPS) score > 5 within 48 h.

Optimizing longifolene production in via metabolic and protein engineering.

Longifolene (CH) is a tricyclic sesquiterpene widely utilized in the cosmetics and fragrances due to its versatile applications. Traditional extraction methods from plants suffer from low titer and lengthy production cycles, while chemical synthesis is hampered by the compound's complex structure, leading to high costs and insufficient market supply. This study aimed to develop a microbial cell factory for enhanced longifolene production.

Synthetic transmembrane DNA receptors enable engineered sensing and actuation.

In living organisms, cells synergistically couple cascade reaction pathways to achieve inter- and intracellular signal transduction by transmembrane protein receptors. The construction and assembly of synthetic receptor analogs that can mimic such biological processes is a central goal of synthetic biochemistry and bionanotechnology to endow receptors with user-defined signal transduction effects. However, designing artificial transmembrane receptors with the desired input, output, and performance parameters are challenging.

Picofluidic Electro-Osmosis Measurement of Cell Membrane Mechanical Properties.

Cells connect with their internal and external environments through plasma membranes, and the mechanical properties of cell membranes govern numerous biological events. Membrane detection techniques such as optical or magnetic tweezers have revealed mechanical strength by membrane-anchored modifications, but it remains challenging to develop label-free methods to reduce the influence of exogenous interference. Here picofluidic electro-osmosis measurement (PEOM), which enables direct and efficient sensing of cell membrane mechanical properties by using a glass nanopipette without labeling, is presented.

The association between short-term exposure to ambient PM and hospitalization costs in patients with myocardial infarction: a hospital-based study.

Myocardial infarction (MI) ranks as one of the primary causes of global disabilities and disease deaths. The association between fine particulate matter (PM2.5) and MI has gained attention in recent years.

LncRNA-AC006129.1 Aggravates kidney hypoxia-ischemia injury by promoting CXCL2-dependent inflammatory response.

Purpose: Hypoxia ischemia (HI) injury is an inevitable risk factor in kidney transplantation. The inflammatory response is crucial in HI. Long non-coding RNAs (lncRNAs) are known to regulate inflammation and immunity, but their role in HI remains unclear.

Understanding the Molecular Mechanisms of Pyrene in Governing the Critical Metabolic Circuits of .

Pyrene, a representative polycyclic aromatic hydrocarbon, frequently occurs in aquatic environments and is associated with lethal impacts on humans and wildlife. This study examined the impact of pyrene on , a dinoflagellate responsible for harmful algal blooms, and their capability to bioremove pyrene. In a 96 h exposure experiment, effectively reduced the pyrene concentration in seawater to 50, 100, and 200 μg/L, with a combined removal efficiency of 96% in seawater.

Niche Partitioning and Intraspecific Variation of Thaumarchaeota in Deep Ocean Sediments.

Deep-sea sediments contain a large number of Thaumarchaeota that are phylogenetically distinct from their pelagic counterparts. However, their ecology and evolutionary adaptations are not well understood. Metagenomic analyses were conducted on samples from various depths of a 750-cm sediment core collected from the Mariana Trench Challenger Deep.

A Modular Engineered DNA Nanodevice for Precise Profiling of Telomerase RNA Location and Activity.

Increased telomerase activity has been considered as a conspicuous sign of human cancers. The catalytic cores of telomerase involve a reverse transcriptase and the human telomerase RNA (hTR). However, current detection of telomerase is largely limited to its activity at the tissue and single-cell levels.

Coil-Library-Derived Amino-Acid-Specific Side-Chain χ Dihedral Angle Potentials for AMBER-Type Protein Force Field.

The successful simulation of proteins by molecular dynamics (MD) critically depends on the accuracy of the applied force field. Here, we modify the AMBER-family ff99SBnmr2 force field through improvements to the side-chain χ dihedral angle potentials in a residue-specific manner using conformational dihedral angle distributions from an experimental coil library as targets. Based on significant deviations observed for the parent force field with respect to the coil library, the χ dihedral angle potentials of seven amino acids were modified, namely, Val, Ser, His, Asn, Trp, Tyr, and Phe.

COLMAR1d: A Web Server for Automated, Quantitative One-Dimensional Nuclear Magnetic Resonance-Based Metabolomics at Arbitrary Magnetic Fields.

The field of metabolomics, which is quintessential in today's omics research, involves the large-scale detection, identification, and quantification of small-molecule metabolites in a wide range of biological samples. Nuclear magnetic resonance spectroscopy (NMR) has emerged as a powerful tool for metabolomics due to its high resolution, reproducibility, and exceptional quantitative nature. One of the key bottlenecks of metabolomics studies, however, remains the accurate and automated analysis of the resulting NMR spectra with good accuracy and minimal human intervention.

Design of a Membrane-Anchored DNAzyme-Based Molecular Machine for Enhanced Cancer Therapy by Customized Cascade Regulation.

Synthetic DNAzyme-based structures enable dynamic cell regulation. However, engineering an effective and targeted DNAzyme-based structure to perform customizable multistep regulation remains largely unexplored. Herein, we designed a membrane-anchored DNAzyme-based molecular machine to implement dynamic inter- and intracellular cascade regulation, which realizes efficient T-cell/cancer cell interactions and subsequent receptor mediated cancer cell uptake.

Chromosome-level assembly of and comparative genomic analyses shed light on genome evolution in Lamiales.

Lamiales, comprising over 23,755 species across 24 families, stands as a highly diverse and prolific plant group, playing a significant role in the cultivation of horticultural, ornamental, and medicinal plant varieties. Whole-genome duplication (WGD) and its subsequent post-polyploid diploidization (PPD) process represent the most drastic type of karyotype evolution, injecting significant potential for promoting the diversity of this lineage. However, polyploidization histories, as well as genome and subgenome fractionation following WGD events in Lamiales species, are still not well investigated.

Chromosome-level and haplotype-resolved genome assembly of Dracaena cambodiana (Asparagaceae).

Dracaena cambodiana Pierre ex Gagn. (Asparagaceae) is the source plant of Dragon's blood and has high ornamental values in gardening. Currently, this species is classified as the second-class state-protected species in the National Key Protected Wild Plants (NKPWP) of China.

Balance between Fe-Ni synergy and Lattice Oxygen Contribution for Accelerating Water Oxidation.

Hydrogen obtained from electrochemical water splitting is the most promising clean energy carrier, which is hindered by the sluggish kinetics of the oxygen evolution reaction (OER). Thus, the development of an efficient OER electrocatalyst using nonprecious 3d transition elements is desirable. Multielement synergistic effect and lattice oxygen oxidation are two well-known mechanisms to enhance the OER activity of catalysts.