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  • Open Access

    ABSTRACT

    The Dependence of Diffusio-Phoretic Mobility and Aggregation Properties of Proteins on Intermolecular Interaction in Confined System

    Jiachen Wei1,2,*

    Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 103-104, 2019, DOI:10.32604/mcb.2019.07721

    Abstract Phoretic flow can be generated by different types of gradient (e.g. temperature, concentration, or charge gradient) [1-3]. Within micro-to-nano confined system, the diffusio-phoretic property for proteins differs dramatically from that obtained in bulk condition, due to concentration fluctuation that emerges at microscopic level induced by specific and nonspecific interactions between protein and co-solute [4-5]. The phoretic mobility of protein individuals and complex in solute gradients can be theoretically described by continuum model [1-2] that neglects microscopic heterogeneity and determined experimentally by microfluidics [6], but the underlying mechanism of diffusio-phoretic motion for confined protein still remains unclear.
    Our approach to… More >

  • Open Access

    ABSTRACT

    Diabetes and Thrombosis: The Dark Side of the Force

    Lining Arnold Ju1,2,3,4,6,†,*, James McFadyen4,†, Saheb Al-Daher4,†, Imala Alwis1,2,3,4, Yunfeng Chen6,7,8, Mark E. Cooper9, Cheng Zhu1,2,3,5,6,7, Shaun P. Jackson1,2,3,4,8

    Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 96-96, 2019, DOI:10.32604/mcb.2019.06979

    Abstract Thrombotic diseases where platelets form clots and obstruct blood vessels remains the leading cause of death and disability in the world. Despite intense investigation over the last 40 years into the discovery and development of more effective drugs, less than 1 in 6 patients taking anti-thrombotic therapies avoid a fatal event. This situation is likely to worsen in younger generations due to the rapidly growing incidence of diabetes, which makes people more prone to thrombosis and resistant to existing anti-thrombotics with unknown reasons.
    To investigate this, I have developed the ‘Biomembrane Force Probe’ as the first-of-its-kind. This nanotool represents… More >

  • Open Access

    ABSTRACT

    Dynamics of Trabecular Meshwork Deformation under Pulsatile Intraocular Pressure

    Xiuqing Qian1,2, Fan yuan1,*

    Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 89-89, 2019, DOI:10.32604/mcb.2019.07041

    Abstract Elevated intraocular pressure (IOP) is the most important risk factor for disease progression in glaucoma patients. The elevation is predominantly due to the increase in the aqueous outflow resistance in the trabecular outflow pathway. Recent data have shown that the resistance increase is correlated with changes in the tissue stiffness. To this end, we developed a mathematical model to simulate how the tissue stiffness can affect the deformation of the trabecular meshwork (TM) that can be determined experimentally. The goal of the study is to develop a method to non-invasively determine the TM stiffness in patients through measurement of the… More >

  • Open Access

    ABSTRACT

    Mechanical Characterization and Constitutive Modeling of Rabbit Aortas in Health and Diabetes

    Zhi Zhang1, Jianhua Tong1,*

    Molecular & Cellular Biomechanics, Vol.16, Suppl.1, pp. 43-43, 2019, DOI:10.32604/mcb.2019.05721

    Abstract Diabetes is a major risk factor to cause macrovascular diseases and plays a pivotal role in aortic wall remodeling. However, the effects of diabetes on elastic properties of aortas remain largely unknown. Thirty adult rabbits (1.6-2.2 kg) were collected and the type I diabetic rabbit model was induced by injection of alloxan. A total of 15 control and 15 diabetic rabbit (abdominal) aortas were harvested. Uniaxial and biaxial tensile tests were performed to measure ultimate tensile strength and to characterize biaxial mechanical behaviors of the aortas. A material model was fitted to the biaxial experimental data to obtain constitutive parameters.… More >

  • Open Access

    ARTICLE

    Tubulointerstitial injury and proximal tubule albumin transport in early diabetic nephropathy induced by type 1 diabetes mellitus

    Maximiliano GIRAUD-BILLOUD1, 2*, Fernando EZQUER2, Javiera BAHAMONDE2, Marcelo EZQUER2

    BIOCELL, Vol.41, No.1, pp. 1-12, 2017, DOI:10.32604/biocell.2017.41.001

    Abstract A decrease in the tubular expression of albumin endocytic transporters megalin and cubilin has been associated with diabetic nephropathy, but there are no comprehensive studies to date relating early tubulointerstitial injury and the effect of the disease on both transporters in type 1 diabetes mellitus (T1DM). We used eight-weekold male C57BL/6 mice divided into two groups; one of them received the vehicle (control group), while the other received the vehicle + 200 mg/kg streptozotocin (T1DM). Ten weeks after the injection, we evaluated plasma insulin, enzymuria, urinary vitamin D-binding protein (VDBP), tubulointerstitial fibrosis and proximal tubule histology, markers of autophagy, and… More >

  • Open Access

    ARTICLE

    Quantum Dot Labeling of Stem Cells during Proliferation and Differentiation

    E. K. Moioli1, B. Shah1, P. A. Clark1, M. Stroscio1, J. J. Mao1

    Molecular & Cellular Biomechanics, Vol.3, No.4, pp. 153-155, 2006, DOI:10.32604/mcb.2006.003.153

    Abstract This article has no abstract. More >

  • Open Access

    ARTICLE

    Encapsulation of Pt-labelled DNA Molecules inside Carbon Nanotubes

    Daxiang Cui1, Cengiz S. Ozkan2, Sathyajith Ravindran3, Yong Kong1, Huajian Gao1

    Molecular & Cellular Biomechanics, Vol.1, No.2, pp. 113-122, 2004, DOI:10.3970/mcb.2004.001.113

    Abstract Experiments on encapsulating Pt--labelled DNA molecules inside multiwalled carbon nanotubes (MWCNT) were performed under temperature and pressure conditions of 400K and 3 Bar. The DNA-CNT hybrids were purified via agarose gel electrophoresis and analyzed via high resolution transmission electron microscopy (HR-TEM) and energy dispersive X-ray spectroscopy (EDX). The results showed that the Pt-labelled DNA molecules attached to the outside walls of CNTs could be removed by electrophoresis. The HR-TEM and EDX results demonstrated that 2-3% of the Pt-labelled DNA molecules were successfully encapsulated inside the MWCNTs. The experimental study complements our previous molecular dynamics simulations on encapsulation of single stranded… More >

  • Open Access

    ARTICLE

    Diabetic nephropathy, autophagy and proximal tubule protein endocytic transport: A potentially harmful relationship

    Maximiliano GIRAUD-BILLOUD1,2,*, Claudio M. FADER1,3, Rocío AGÜERO2, Fernando EZQUER4, Marcelo EZQUER4

    BIOCELL, Vol.42, No.2, pp. 35-40, 2018, DOI:10.32604/biocell.2018.07010

    Abstract Diabetic nephropathy (DN) is the most frequent cause of chronic renal failure. Until now, the pathophysiological mechanisms that determine its development and progression have not yet been elucidated. In the present study, we evaluate the role of autophagy at early stages of DN, induced in type 2 diabetes mellitus (T2DM) mouse, and its association with proximal tubule membrane endocytic receptors, megalin and cubilin. In T2DM animals we observed a tubule-interstitial injury with significantly increased levels of urinary GGT and ALP, but an absence of tubulointerstitial fibrosis. Kidney proximal tubule cells of T2DM animals showed autophagic vesicles larger than those observed… More >

  • Open Access

    ARTICLE

    Mechanism Based Pharmacokinetic Pharmacodynamic Modeling of Vildagliptin as an Add-on to Metformin for Subjects with Type 2 Diabetes

    Marziyeh Eftekhari1, Omid Vahidi1,*

    CMES-Computer Modeling in Engineering & Sciences, Vol.114, No.2, pp. 153-171, 2018, DOI:10.3970/cmes.2018.114.153

    Abstract Various drugs are used to maintain normoglycemia in subjects with type 2 diabetes mellitus. The combination of the drugs from different classes in one single tablet may enhance the effectiveness of the anti-diabetic drugs. To investigate the impact of combining drugs on the glucose regulation of subjects with type 2 diabetes, we propose a pharmacokinetic/pharmacodynamics (PK/PD) mathematical modeling approach for a combination of metformin and vildagliptin drugs. In the proposed modeling approach, two separate PK models representing oral administration of metformin and vildagliptin for diabetic subjects are interconnected to a PD model comprising a detailed compartmental physiological model representing the… More >

  • Open Access

    ABSTRACT

    Image Processing/Machine-Learning for Auto-Labeling of Steel Images on Present Microstructures

    Dmitry S. Bulgarevich1,*, Susumu Tsukamoto1, Tadashi Kasuya2, Masahiko Demura1, Makoto Watanabe1,3

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.2, pp. 122-122, 2019, DOI:10.32604/icces.2019.05271

    Abstract The microstructure of steel greatly determines its mechanical properties/performance and holds information on chemical composition and processing history. Therefore, quantitative analysis of optical or SEM images on formed microstructure phases is one of the primary interests for metallurgy. So far, such analyses in laboratories are done manually by experts and are very time consuming. However, with modern microscopy techniques of automated image acquisitions over the large imaging areas and even by using of sample slicing for three-dimensional imaging, the amount of image data could be overwhelming for manual examinations. In this respect, there is a possibility that machine learning (ML)… More >

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