Fibroblast morphology on dynamic softening of hydrogels.

Abstract:

:Despite cellular environments having dynamic characteristics, many laboratories utilized static polyacrylamide hydrogels to study the ECM-cell relationship. To attain a more in vivo like environment, we have developed a dynamic, DNA-crosslinked hydrogel (DNA gel). Through the controlled delivery of DNA, we can temporally decrease or increase gel stiffness while expanding or contracting the gel, respectively. These dual mechanical changes make DNA gels a cell-ECM model for studying dynamic mechano-regulated processes, such as wound healing. Here, we characterized DNA gels on a mechanical and cellular level. In contrast to our previous publication, in which we examined the increasing stiffness effects on fibroblast morphology, we examined the effects of decreased matrix stiffness on fibroblast morphology. In addition, we quantified the bulk and/or local stress and strain properties of dynamic gels. Gels generated about 0.5 Pa stress and about 6-11% strain upon softening to generate larger and more circular fibroblasts. These results complemented our previous study, where dynamic gels contracted upon stiffening to generate smaller and longer fibroblasts. In conclusion, we developed a biomaterial that increases and decreases in stiffness while contracting and expanding, respectively. We found that the dynamic deformation directionality of the matrix determined the fibroblast morphology and possibly influences function.

journal_name

Ann Biomed Eng

authors

Previtera ML,Trout KL,Verma D,Chippada U,Schloss RS,Langrana NA

doi

10.1007/s10439-011-0483-2

subject

Has Abstract

pub_date

2012-05-01 00:00:00

pages

1061-72

issue

5

eissn

0090-6964

issn

1573-9686

journal_volume

40

pub_type

杂志文章
  • Electrically active bioceramics: a review of interfacial responses.

    abstract::Electrical potentials in mechanically loaded bone have been implicated as signals in the bone remodeling cycle. Recently, interest has grown in exploiting this phenomenon to develop electrically active ceramics for implantation in hard tissue which may induce improved biological responses. Both polarized hydroxyapatit...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章,评审

    doi:10.1007/s10439-010-9977-6

    authors: Baxter FR,Bowen CR,Turner IG,Dent AC

    更新日期:2010-06-01 00:00:00

  • Real-Time linux dynamic clamp: a fast and flexible way to construct virtual ion channels in living cells.

    abstract::We describe a system for real-time control of biological and other experiments. This device, based around the Real-Time Linux operating system, was tested specifically in the context of dynamic clamping, a demanding real-time task in which a computational system mimics the effects of nonlinear membrane conductances in...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1114/1.1408929

    authors: Dorval AD,Christini DJ,White JA

    更新日期:2001-10-01 00:00:00

  • Analog electrical model of the coronary circulation in case of multiple revascularizations.

    abstract::In this work, we propose an analog electrical model of the coronary circulation for patients with obstructive disease undergoing revascularization. In this clinical situation, the collateral circulation to the occluded artery is difficult to ascertain via preoperative measurements and well-developed collaterals might ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-008-9500-5

    authors: Maasrani M,Verhoye JP,Corbineau H,Drochon A

    更新日期:2008-07-01 00:00:00

  • Analytical Modelling of Natural Frequency of Tympanic Membrane as the Low-Frequency Limit of Hearing.

    abstract::We examine the low-frequency limit of hearing of the mammalian ear through the analytical modelling of the natural frequency of the tympanic membrane. The resulting equation of the natural frequency of the modelled tympanic membrane is numerically verified against previous theoretical studies, and is statistically val...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-019-02356-4

    authors: Jabaraj DJ

    更新日期:2020-01-01 00:00:00

  • Organ Dynamics and Fluid Dynamics of the HH25 Chick Embryonic Cardiac Ventricle as Revealed by a Novel 4D High-Frequency Ultrasound Imaging Technique and Computational Flow Simulations.

    abstract::Past literature has provided evidence that a normal mechanical force environment of blood flow may guide normal development while an abnormal environment can lead to congenital malformations, thus warranting further studies on embryonic cardiovascular flow dynamics. In the current study, we developed a non-invasive 4D...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-017-1882-9

    authors: Ho S,Tan GXY,Foo TJ,Phan-Thien N,Yap CH

    更新日期:2017-10-01 00:00:00

  • A Wearable Magnet-Based System to Assess Activity and Joint Flexion in Humans and Large Animals.

    abstract::Functional outcomes, such as joint flexion and gait, are important indicators of efficacy in musculoskeletal research. Current technologies that objectively assess these parameters, including visual tracking systems and force plates, are challenging to deploy in long-term translational and clinical studies. To that en...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-018-2105-8

    authors: Qu F,Stoeckl BD,Gebhard PM,Hullfish TJ,Baxter JR,Mauck RL

    更新日期:2018-12-01 00:00:00

  • Phospholipids identified on the pericardium and their ability to impart boundary lubrication.

    abstract::Phospholipids have been identified by thin-layer chromatography in appreciable quantities in pericardial fluid taken from 12 dogs and found to include sphingomyelin and phosphatidylcholines, -ethanolamines, -inositols and -serines--the cholines predominating. The extracts, the synthetic surfactants and a mixture of sy...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02584258

    authors: Hills BA,Butler BD

    更新日期:1985-01-01 00:00:00

  • Intelligent multichannel stimulator for the study of cardiac arrhythmias.

    abstract::An intelligent multichannel stimulator (IMS) has been designed and built for use in a cardiac research environment. The device is capable of measuring and responding to cardiac electrophysiological phenomena in real time with carefully timed and placed electrical stimuli. The system consists of 16 channels of sense/st...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1114/1.1451077

    authors: Johnson PL,Newton JC,Rollins DL,Knisley SB,Ideker RE,Smith WM

    更新日期:2002-02-01 00:00:00

  • Importance of temperature and humidity in the measurement of pulmonary oxygen uptake per breath during anesthesia.

    abstract::Traditionally, measurement of pulmonary O2 uptake uses mass balance of N2 to correct for differences between inspired and expired volume (V) due to temperature (T) and relative humidity (RH). Often during anesthesia, N2 balance cannot be invoked due to high inspired O2 fraction (FIO2) or nonsteady state conditions. Th...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1114/1.1312184

    authors: Breen PH

    更新日期:2000-09-01 00:00:00

  • Quantitative Validation of a Human Body Finite Element Model Using Rigid Body Impacts.

    abstract::Validation is a critical step in finite element model (FEM) development. This study focuses on the validation of the Global Human Body Models Consortium full body average male occupant FEM in five localized loading regimes-a chest impact, a shoulder impact, a thoracoabdominal impact, an abdominal impact, and a pelvic ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-015-1286-7

    authors: Vavalle NA,Davis ML,Stitzel JD,Gayzik FS

    更新日期:2015-09-01 00:00:00

  • Error mechanisms of the oscillometric fixed-ratio blood pressure measurement method.

    abstract::The oscillometric fixed-ratio method is widely employed for non-invasive measurement of systolic and diastolic pressures (SP and DP) but is heuristic and prone to error. We investigated the accuracy of this method using an established mathematical model of oscillometry. First, to determine which factors materially aff...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-012-0700-7

    authors: Liu J,Hahn JO,Mukkamala R

    更新日期:2013-03-01 00:00:00

  • Low-Profile Electromagnetic Field Sensors in the Measurement and Modelling of Three-Dimensional Jaw Kinematics and Occlusal Loading.

    abstract::Dynamic occlusal loading during mastication is clinically relevant in the design and functional assessment of dental restorations and removable dentures, and in evaluating temporomandibular joint dysfunction. The aim of this study was to develop a modelling framework to evaluate subject-specific dynamic occlusal loadi...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-020-02688-6

    authors: Woodford SC,Robinson DL,Edelmann C,Mehl A,Röhrle O,Vee Sin Lee P,Ackland DC

    更新日期:2021-01-06 00:00:00

  • BMP-2 gene modified canine bMSCs promote ectopic bone formation mediated by a nonviral PEI derivative.

    abstract::The study was to explore the effects of BMP-2 gene modified canine bone marrow stromal cells (bMSCs) mediated by a nonviral PEI derivative (GenEscort™ II) in promoting bone formation in vitro and in vivo. Canine bMSCs were cultured and transfected with plasmids containing bone morphogenetic protein-2 gene (pBMP-2) or ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-011-0276-7

    authors: Lü K,Zeng D,Zhang Y,Xia L,Xu L,Kaplan DL,Jiang X,Zhang F

    更新日期:2011-06-01 00:00:00

  • Influence of different presentations of oscillometric data on automatic determination of systolic and diastolic pressures.

    abstract::Most non-invasive blood pressure measurements are based on either the auscultatory or the oscillometric technique. In this study, we performed an extensive analysis of the signals, i.e., responses of a microphone implanted in the cuff and pressure changes in the cuff, which can be recorded during such measurements. We...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-009-9853-4

    authors: Jazbinsek V,Luznik J,Mieke S,Trontelj Z

    更新日期:2010-03-01 00:00:00

  • Electrospinning of nanocomposite fibrillar tubular and flat scaffolds with controlled fiber orientation.

    abstract::Electrospinning was used in innovative electrospinning rigs to obtain tubular and flat fibrous structures with controlled fiber orientation with the aim to be used as scaffolds for biomedical applications, more specifically in the tissue engineering of vascular and orthopedic grafts. Gelatine and hydroxyapatite (HA)-g...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-011-0350-1

    authors: Salifu AA,Nury BD,Lekakou C

    更新日期:2011-10-01 00:00:00

  • Creep deformation of the human trunk in response to prolonged and repetitive flexion: measuring and modeling the effect of external moment and flexion rate.

    abstract::While viscoelastic responses of isolated trunk soft tissues have been characterized in earlier studies, the effects of external loading and flexion rate on these responses in the intact human trunk are largely unknown. Two experiments were conducted to measure trunk viscoelastic behaviors, one involving prolonged flex...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-013-0797-3

    authors: Toosizadeh N,Nussbaum MA

    更新日期:2013-06-01 00:00:00

  • Prediction of the biomechanical effects of compression therapy on deep veins using finite element modelling.

    abstract::Clinicians generally assume that Medical Compression Stockings (MCS) work by reducing vein luminal diameter and, in this way, help to prevent blood pooling. Conflicting results have been reported however in the case of lower leg deep veins which call into question this hypothesis. The purpose of this contribution is t...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-014-1121-6

    authors: Rohan PY,Badel P,Lun B,Rastel D,Avril S

    更新日期:2015-02-01 00:00:00

  • Hydrodynamic shear and tethering through E-selectin signals phosphorylation of p38 MAP kinase and adhesion of human neutrophils.

    abstract::Recently, we reported that tethering and rolling of neutrophils in shear flow over a substrate of E-selectin signals activation of beta 2-integrins and firm adhesion via an intracellular signaling pathway involving phosphorylation of p38 MAP kinase. In the current study the objective was to examine the molecular mecha...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1114/1.1511240

    authors: Hentzen E,McDonough D,McIntire L,Smith CW,Goldsmith HL,Simon SI

    更新日期:2002-09-01 00:00:00

  • Biomechanical Properties and Microstructure of Heart Chambers: A Paired Comparison Study in an Ovine Model.

    abstract::Mechanical properties of the cardiac tissue play an important role in normal heart function. The goal of this study was to determine the passive mechanical properties of all heart chambers through a paired comparison study in an ovine model. Ovine heart was used due its physiological and anatomical similarities to hum...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-016-1658-7

    authors: Javani S,Gordon M,Azadani AN

    更新日期:2016-11-01 00:00:00

  • An artificial neural network approach to the predictive modeling of tensile force during renal suturing.

    abstract::Further understanding of the mechanical deformation and tear behavior of kidney during suturing helps to enhance surgical task execution that requires fine suture manipulation. This paper aims to develop a model to describe the relationship between the tensile force acting on suture line and the resulted kidney deform...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-012-0722-1

    authors: Yu D,Qing Y,Jianxun Z,Jun D

    更新日期:2013-04-01 00:00:00

  • Population-Based Bone Strain During Physical Activity: A Novel Method Demonstrated for the Human Femur.

    abstract::Statistical methods are increasingly used in biomechanics for studying bone geometry, bone density distribution and function in the population. However, relating population-based bone variation to strain during activity is computationally challenging. Here, we describe a new method for calculating strain in a populati...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-020-02483-3

    authors: Ziaeipoor H,Taylor M,Martelli S

    更新日期:2020-06-01 00:00:00

  • Historic and future development of high-frequency ventilation.

    abstract::High-frequency ventilation (HFV) has not one but several histories. Proceeding along largely independent pathways are techniques using frequencies of 1-5 Hz and techniques using 10-40 Hz, the former being introduced by Sjostrand in 1971, the latter by Lunkenheimer in 1972. It was nearly ten years before it was recogni...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02407779

    authors: Bryan AC

    更新日期:1984-01-01 00:00:00

  • A direct compression stimulator for articular cartilage and meniscal explants.

    abstract::This paper describes the development and use of a direct compression stimulator for culturing explants from the meniscus of the knee and articular cartilage. Following design and fabrication of the instrument along with its data acquisition system, the function of the machine was verified by both mechanical means and ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-006-9157-x

    authors: Aufderheide AC,Athanasiou KA

    更新日期:2006-09-01 00:00:00

  • Low strength static magnetic field inhibits the proliferation, migration, and adhesion of human vascular smooth muscle cells in a restenosis model through mediating integrins β1-FAK, Ca2+ signaling pathway.

    abstract::The proliferation, migration, and adhesion of vascular smooth muscle cells (VSMCs) and their interactions with extracellular matrix are key features of atherosclerosis and restenosis. Recently, there has been evidence that magnetic fields exert multiple effects on the biological performance of cells and may aid in the...

    journal_title:Annals of biomedical engineering

    pub_type: 临床试验,杂志文章

    doi:10.1007/s10439-012-0602-8

    authors: Li Y,Song LQ,Chen MQ,Zhang YM,Li J,Feng XY,Li W,Guo W,Jia G,Wang H,Yu J

    更新日期:2012-12-01 00:00:00

  • Restoring Ovarian Endocrine Function with Encapsulated Ovarian Allograft in Immune Competent Mice.

    abstract::Premature ovarian insufficiency (POI) is a major complication of cytotoxic treatments due to extreme ovarian sensitivity to chemotherapy and radiation. In pediatric cancer patients modern therapy has improved the long-term survival to over 80% in the United States. However, these cancer survivors face long-term health...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-016-1780-6

    authors: David A,Day JR,Cichon AL,Lefferts A,Cascalho M,Shikanov A

    更新日期:2017-07-01 00:00:00

  • Advection and diffusion of substances in biological tissues with complex vascular networks.

    abstract::For highly diffusive solutes the kinetics of blood-tissue exchange is only poorly represented by a model consisting of sets of independent parallel capillary-tissue units. We constructed a more realistic multicapillary network model conforming statistically to morphometric data. Flows through the tortuous paths in the...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1114/1.273

    authors: Beard DA,Bassingthwaighte JB

    更新日期:2000-03-01 00:00:00

  • Multidirectional pelvic floor muscle strength measurement.

    abstract::Pelvic floor muscle (PFM) strength measurement provides useful information for the study of pelvic floor dysfunctions. Vaginal digital palpation, intravaginal pressure measurements, and the use of a dynamometric speculum represent currently available clinical methods for evaluating PFM strength. However, none of these...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-009-9728-8

    authors: Saleme CS,Rocha DN,Del Vecchio S,Silva Filho AL,Pinotti M

    更新日期:2009-08-01 00:00:00

  • Localized spatial discrimination of epicardial conduction paths after linear transformation of variant information.

    abstract::We present a method for the localized statistical discrimination of class populations based on the Karhunen-Loève and Fukunaga-Koontz transforms. These transforms provide features that model the variance of a sample distribution. The spatial series of a 196 channel epicardial electrogram recording from an arrythmogeni...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/BF02367084

    authors: Ciaccio EJ,Dunn SM,Akay M,Wit AL,Coromilas J,Costeas CA

    更新日期:1994-09-01 00:00:00

  • Biofluid mechanics of special organs and the issue of system control. Sixth International Bio-Fluid Mechanics Symposium and Workshop, March 28-30, 2008 Pasadena, California.

    abstract::In the field of fluid flow within the human body, focus has been placed on the transportation of blood in the systemic circulation since the discovery of that system; but, other fluids and fluid flow phenomena pervade the body. Some of the most fascinating fluid flow phenomena within the human body involve fluids othe...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-010-9902-z

    authors: Zamir M,Moore JE Jr,Fujioka H,Gaver DP 3rd

    更新日期:2010-03-01 00:00:00

  • A long-memory model of motor learning in the saccadic system: a regime-switching approach.

    abstract::Maintenance of movement accuracy relies on motor learning, by which prior errors guide future behavior. One aspect of this learning process involves the accurate generation of predictions of movement outcome. These predictions can, for example, drive anticipatory movements during a predictive-saccade task. Predictive ...

    journal_title:Annals of biomedical engineering

    pub_type: 杂志文章

    doi:10.1007/s10439-012-0669-2

    authors: Wong AL,Shelhamer M

    更新日期:2013-08-01 00:00:00