Capstan-like mechanism in hyaluronan–phospholipid systems

Bełdowski, Piotr; Kruszewska, Natalia; Yuvan, Steven; Dendzik, Z.; Goudoulas, Thomas B.; Gadomski, Adam

doi:10.1016/j.chemphyslip.2018.08.002

Cited by 7 publications

(11 citation statements)

References 42 publications

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“…All results of the sample MSD suggested that a CTRW did not underlie the process, as this would produce sublinear behavior. Next, we performed the p-variational test according to Equation (10). This test again excluded a CTRW for modeling changes in the number of inter-and intra-molecular HBO interactions for all concentrations.…”

Section: Determining a Stochastic Modelmentioning

confidence: 99%

“…Thus, it is important to analyze the dynamics of each component, as well as the synergy between them. In [9][10][11], we focused on the tribological role of HA-PL interactions, an effect also investigated in [12] for its role in tribological surgical adjuvant. To continue building an understanding of synovial lubrication, we now study the inter-and intra-molecular properties of lubricin within synovial fluid.…”

Section: Introductionmentioning

confidence: 99%

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Formation of Protein Networks between Mucins: Molecular Dynamics Study Based on the Interaction Energy of the System

et al. 2019

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Molecular dynamics simulations have been performed for a model aqueous solution of mucin. As mucin is a central part of lubricin, a key component of synovial fluid, we investigate its ability to form cross-linked networks. Such network formation could be of major importance for the viscoelastic properties of the soft-matter system and crucial for understanding the lubrication mechanism in articular cartilage. Thus, the inter- and intra-molecular interaction energies between the residues of mucin are analyzed. The results indicate that the mucin concentration significantly impacts its cross-linking behavior. Between 160 g/L and 214 g/L, there seems to be a critical concentration above which crowding begins to alter intermolecular interactions and their energies. This transition is further supported by the mean squared displacement of the molecules. At a high concentration, the system starts to behave subdiffusively due to network development. We also calculate a sample mean squared displacement and p-variation tests to demonstrate how the statistical nature of the dynamics is likewise altered for different concentrations.

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Section: Determining a Stochastic Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Formation of Protein Networks between Mucins: Molecular Dynamics Study Based on the Interaction Energy of the System

et al. 2019

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“…They claimed that the low friction coefficients observed in incongruent joints represent rolling rather than sliding friction. A possibility of lowering friction forces in the AC by altering the characteristic action of its components (phospholipid micelles trapped in the network of hyaluronic acid chains) from sliding to rolling was noted in [ 6 ]. Another example of friction measurements was reported in [ 7 ] for ACs collected from bovine knees.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Synovial Fluid Components: Albumin-Chondroitin Sulfate Interactions Seen through Molecular Dynamics

et al. 2022

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The friction coefficient of articular cartilage (AC) is very low. A method of producing tailor-made materials with even similar lubrication properties is still a challenge. The physicochemical reasons for such excellent lubrication properties of AC are still not fully explained; however, a crucial factor seems to be synergy between synovial fluid (SF) components. As a stepping stone to being able to produce innovative materials characterized by a very low friction coefficient, we studied the interactions between two important components of SF: human serum albumin (HSA) and chondroitin sulfate (CS). The molecular dynamics method, preceded by docking, is used in the study. Interactions of HSA with two types of CS (IV and VI), with the addition of three types of ions often found in physiological solutions: Ca2+, Na+, and Mg2+, are compared. It was found that there were differences in the energy of binding values and interaction maps between CS-4 and CS-6 complexes. HSA:CS-4 complexes were bound stronger than in the case of HSA:CS-6 because more interactions were formed across all types of interactions except one—the only difference was for ionic bridges, which were more often found in HSA:CS-6 complexes. RMSD and RMSF indicated that complexes HSA:CS-4 behave much more stably than HSA:CS-6. The type of ions added to the solution was also very important and changed the interaction map. However, the biggest difference was caused by the addition of Ca2+ ions which were prone to form ionic bridges.

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“…For example, rabbit VH has 2000–3000 kDa HA strands but bovine HA strands are shorter at 500–800 kDa [ 4 ]. Along the polysaccharide chains, hydrogen bonds cause the strand to twist, forming a helical ‘ribbon’ with hydrophobic and hydrophilic regions between the 1–3 and the 1–4 linkages [ 5 , 6 ]. About half of the HA found in the human body is present in the skin [ 7 ], the remainder found in synovial fluid [ 8 ], the vitreous body [ 9 ] the umbilical cord [ 10 ] and places where friction occurs such as joints, tendons, sheaths, pleura, and the pericardium.…”

Section: Introductionmentioning

confidence: 99%

“…The historical importance of structural changes to HA induced by PLs in synovial fluids have been reviewed [ 5 , 22 ]. It has been speculated that HA–lipid hydrophobic interactions in synovial fluids contribute to lubricating and protecting joint cavities.…”

Section: Introductionmentioning

confidence: 99%

Hyaluronic acid–lipid binding

et al. 2021

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Background Phospholipid (PL)–hyaluronic acid (HA) interactions are relevant to aging-associated vitreous humor liquefaction, therapies for dry eye disease, skin-care products and synovial joint lubrication. Phosphatidyl choline–HA interactions have been well characterized. However, other major lipids found in tears, vitreous humor and synovial joints have not. The purpose of this study was to bridge this gap of knowledge. Methods HA (1600 kDa) at 5 mg/mL, was mixed with various lipids ranging in concentration from 0.1 to 10 mg/mL in D2O. HA–PL binding was measured from the decrease in HA proton resonance intensity with binding using a nuclear magnetic resonance spectrometer. Results Cholesterol weakly bound to HA, followed by monoglyceride and palmitoyl palmitate < phosphatidyl choline, phosphatidic acid and sphingomyelin. The maximum amount of PL bound was 14 ± 1 µmoles inferring a 1 to 1 molar ratio of bound PL to HA dimer. Monoglyceride and palmitoyl palmitate required two to three times more lipid to achieve 100% bound HA compared to PL. Conclusions Physiological levels of HA, phosphatidyl choline and sphingomyelin would result in only 4% of the hydrophobic hydrogens of HA to be bound. HA–PL binding interactions could be important for therapeutic use of HA in eye drops in future studies to treat dry eye and to trap PL entering the VH to keep them from forming light scattering micelles. HA–lipid binding may also be relevant to the therapeutic effects of topical skin-care products. Both head group and hydrocarbon chain moieties influence HA–lipid interactions.

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Capstan-like mechanism in hyaluronan–phospholipid systems

Cited by 7 publications

References 42 publications

Formation of Protein Networks between Mucins: Molecular Dynamics Study Based on the Interaction Energy of the System

Formation of Protein Networks between Mucins: Molecular Dynamics Study Based on the Interaction Energy of the System

Characterization of Synovial Fluid Components: Albumin-Chondroitin Sulfate Interactions Seen through Molecular Dynamics

Hyaluronic acid–lipid binding

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