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Peptide-Based Complex Coacervates Stabilized by Cation-π Interactions for Cell Engineering.
J Am Chem Soc
January 2025
Center for Sustainable Materials (SusMat), School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
Complex coacervation is a form of liquid-liquid phase separation, whereby two types of macromolecules, usually bearing opposite net charges, self-assemble into dense microdroplets driven by weak molecular interactions. Peptide-based coacervates have recently emerged as promising carriers to deliver large macromolecules (nucleic acids, proteins and complex thereof) inside cells. Thus, it is essential to understand their assembly/disassembly mechanisms at the molecular level in order to tune the thermodynamics of coacervates formation and the kinetics of cargo release upon entering the cell.
View Article and Find Full Text PDFThe Possible Crystallization Process in the Origin of Bacteria, Archaea, Viruses, and Mobile Elements.
Biology (Basel)
December 2024
Division of Biochemistry, Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan.
We propose a hypothesis for the simultaneous emergence of bacteria, archaea, viruses, and mobile elements by sequential and concrete biochemical pathways. The emergence process can be considered analogous to crystallization, where genetic and biochemical systems stabilize as organisms evolve from their common ancestor, the LUCA, which was a non-free-living pool of single operon type genomes including double-stranded (ds) DNA at an ancient submarine alkaline vent. Each dsDNA operon was transcribed by different systems in σ, TFIIB, or TBP genomes.
View Article and Find Full Text PDFPreparation, characterisation, and application of gelatin/sodium carboxymethyl cellulose/peach gum ternary composite microcapsules for encapsulating sweet orange essential oil.
Int J Biol Macromol
January 2025
College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China; Heilongjiang Provincial Key Laboratory of New Drug Development and Pharmacotoxicological Evaluation, Jiamusi University, Jiamusi 154007, PR China.
This study successfully developed a gelatin-sodium carboxymethyl cellulose-peach gum composite microcapsule system using the complex coacervation method. Optimal preparation conditions were determined by turbidity, complex condensate yield and encapsulation efficiency: the ratio of gelatin to sodium carboxymethyl cellulose was 7:1, the ratio of gelatin/sodium carboxymethyl cellulose to peach gum was 4:1, and the pH value was 4.2.
View Article and Find Full Text PDFGreen solid lipid nanoparticles by coacervation of fatty acids: An innovative cosmetic ingredient for the delivery of anti-age compounds through the skin.
Int J Pharm
January 2025
University of Turin, Department of Drug Science and Technology, via Pietro Giuria 9, 10125 Turin, Italy; University of Turin, Department of Medical Sciences, Dermatologic Clinic, Via Cherasco 23, 10126 Turin, Italy.
The constant exposure of the skin to internal and external stimuli drives towards skin aging and lost in skin hydration and elasticity. Chronic low-grade inflammation, called inflammaging, and oxidative stress are the leading causes of this phenomenon. Fatty acid coacervation is a preparation method for Solid Lipid Nanoparticles (SLNs), which does not employ solvents, and is associated to low energy consumption.
View Article and Find Full Text PDFAnimal-free coacervates: The combination of fungal chitosan-gum Arabic for the encapsulation of lipophilic compounds.
Int J Biol Macromol
January 2025
Université Le Havre Normandie, Normandie Univ, URCOM, UR 3221, Le Havre F-76600, France. Electronic address:
In this study, fungal chitosan (FC) and gum Arabic (GA) were combined to develop non-animal complex coacervates for encapsulation. Optimal coacervate formation occurred at pH 5 with a 1:4 (FC:GA) weight ratio. Innovative complementary approaches, including rheology coupled with phase-contrast microscopy, revealed that FC-GA coacervates could withstand high shear rates, reverting to their original structure afterward, making them suitable for industrial applications.
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