Dataset Information

Surface Activity and Foaming Capacity of Aggregates Formed between an Anionic Surfactant and Non-Cellulosics Leached from Wood Fibers.

ABSTRACT: This study relates to the release of non-cellulosic components (cell wall heteropolysaccharides, lignin, and extractives) from swollen wood fibers in the presence of an anionic surfactant (sodium dodecyl sulfate, SDS) at submicellar concentrations. Highly surface-active aggregates form between SDS and the leached, non-cellulosic components, which otherwise do not occur in the presence of cationic or nonionic surfactants. The in situ and efficient generation of liquid foams in the presence of the leached species is demonstrated. The foaming capacity and foam stability, as well as the foam's structure, are determined as a function of the composition of the aqueous suspension. The results indicate that naturally occurring components bound to wood fibers are extractable solely with aqueous solutions of the anionic surfactant. Moreover, they can form surface-active aggregates that have a high foaming capacity. The results further our understanding of residual cell wall components and their role in the generation of foams.

SUBMITTER: Xiang W

PROVIDER: S-EPMC6560501 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Publications

Surface Activity and Foaming Capacity of Aggregates Formed between an Anionic Surfactant and Non-Cellulosics Leached from Wood Fibers.

Xiang Wenchao W Preisig Natalie N Laine Christiane C Hjelt Tuomo T Tardy Blaise L BL Stubenrauch Cosima C Rojas Orlando J OJ

Biomacromolecules 20190509 6

This study relates to the release of non-cellulosic components (cell wall heteropolysaccharides, lignin, and extractives) from swollen wood fibers in the presence of an anionic surfactant (sodium dodecyl sulfate, SDS) at submicellar concentrations. Highly surface-active aggregates form between SDS and the leached, non-cellulosic components, which otherwise do not occur in the presence of cationic or nonionic surfactants. The in situ and efficient generation of liquid foams in the presence of the ...[more]

PMID: 31021605

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Project description:Rhinoviruses (RVs) are major instigators of acute exacerbations of asthma, COPD and other respiratory diseases. RVs are categorized into three species (RV-A, RV-B, and RV-C), which comprise more than 160 serotypes, making it difficult to develop an effective vaccine. Currently no effective treatment for RV infection is available. Pulmonary surfactant is an extracellular complex of lipids and proteins that plays a central role in regulating innate immunity in the lung. The minor pulmonary surfactant lipids, palmitoyl-oleoyl-phosphatidylglycerol (POPG) and phosphatidylinositol (PI), are potent regulators of inflammatory processes, and exert antiviral activity against respiratory syncytial virus (RSV) and influenza A viruses (IAV). In the current study, we examined the potencies of POPG and PI against rhinovirus A16 (RV-A16) in primary human airway epithelial cells (AECs) differentiated at an air-liquid interface (ALI). After AECs were infected with RV-A16, PI reduced viral RNA copy number by 80% and downregulated (55-65%) expression of antiviral genes (MDA5, IRF7 and IFN-lambda). In contrast, POPG only slightly decreased MDA5 (24%) and IRF7 (11%) gene expression but did not inhibit IFN-lambda gene expression or RV-A16 replication in AECs. However, both POPG and PI inhibited (50-80%) IL6 and CXCL11 gene expression and protein secretion. PI treatment dramatically attenuated global gene expression changes induced by RV-A16 infection in AECs. Cell type enrichment analysis of viral regulated genes opposed by PI treatment revealed that PI inhibited viral induction of goblet cell metaplasia and virus-induced downregulation of ciliated, club, and ionocyte cell types. Notably, PI treament altered the ability of RV-A16 to regulate expression of some phosphatidylinositol 4-kinase (PI4K), acyl-CoA binding domain containing (ACBD) and low density lipoprotein receptor (LDLR) genes that play critical roles in the formation and functioning of replication organelles (ROs) required for RV replication in host cells. These data suggest PI can be used as a potent, non-toxic antiviral agent for RV infection prophylaxis and treatment.

Dataset Information

Surface Activity and Foaming Capacity of Aggregates Formed between an Anionic Surfactant and Non-Cellulosics Leached from Wood Fibers.

Publications

Surface Activity and Foaming Capacity of Aggregates Formed between an Anionic Surfactant and Non-Cellulosics Leached from Wood Fibers.

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