LIVIVO - Search results -

Search results

Result 1 - 10 of total 1319

Search options

Article ; Online: Measurement of Molecular Height Using Cell Surface Optical Profilometry (CSOP).

Son, Sungmin / Fletcher, Daniel A

Methods in molecular biology (Clifton, N.J.)

2023 Volume 2654, Page(s) 113–122

Abstract: The plasma membrane of cells is covered by proteins, glycoproteins, and glycolipids with molecular heights ranging from just a few nanometers to hundreds of nanometers. Formation of cell-cell contacts and signal transduction by individual receptors can ... ...

Abstract	The plasma membrane of cells is covered by proteins, glycoproteins, and glycolipids with molecular heights ranging from just a few nanometers to hundreds of nanometers. Formation of cell-cell contacts and signal transduction by individual receptors can be dependent on both the average height of a cell's glycocalyx and the specific height of individual receptors, sometimes with nanometer-scale sensitivity. While super-resolution imaging techniques allow molecular distances to be measured with the sub-diffraction limited resolution, typically 10 nm in the lateral direction and 100 nm in the axial direction, measurements of molecular heights at the single nanometer scale on native cell membranes have been difficult to obtain. Cell surface optical profilometry (CSOP) is a simple and rapid method that achieves nanometer height resolution by localizing fluorophores at the tip and base of cell surface molecules and determining their separation with high precision by radially averaging across many molecules. Here we describe how to make CSOP measurements of multi-domain proteins on model membrane surfaces as well as native cell surfaces.
MeSH term(s)	Cell Membrane/metabolism ; Glycocalyx ; Glycoproteins/metabolism ; Signal Transduction
Chemical Substances	Glycoproteins
Language	English
Publishing date	2023-04-27
Publishing country	United States
Document type	Journal Article
ISSN	1940-6029
ISSN (online)	1940-6029
DOI	10.1007/978-1-0716-3135-5_7
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- Full text online
- Order with fees

Article ; Online: Approaching future rewards or waiting for them to arrive: Spatial representations of time and intertemporal choice.

Fletcher, Daniel / Houghton, Robert / Spence, Alexa

PloS one

2024 Volume 19, Issue 4, Page(s) e0301781

Abstract: Our mental representation of the passage of time is structured by concepts of spatial motion, including an ego-moving perspective in which the self is perceived as approaching future events and a time-moving perspective in which future events are ... ...

Abstract	Our mental representation of the passage of time is structured by concepts of spatial motion, including an ego-moving perspective in which the self is perceived as approaching future events and a time-moving perspective in which future events are perceived as approaching the self. While previous research has found that processing spatial information in one's environment can preferentially activate either an ego-moving or time-moving temporal perspective, potential downstream impacts on everyday decision-making have received less empirical attention. Based on the idea people may feel closer to positive events they see themselves as actively approaching rather than passively waiting for, in this pre-registered study we tested the hypothesis that spatial primes corresponding to an ego-moving (vs. time-moving) perspective would attenuate temporal discounting by making future rewards feel more proximal. 599 participants were randomly assigned to one of three spatial prime conditions (ego-moving, time-moving, control) resembling map-based tasks people may engage with on digital devices, before completing measures of temporal perspective, perceived wait time, perceived control over time, and temporal discounting. Partly consistent with previous research, the results indicated that the time-moving prime successfully activated the intended temporal perspective-though the ego-moving prime did not. Contrary to our primary hypotheses, the spatial primes had no effect on either perceived wait time or temporal discounting. Processing spatial information in a map-based task therefore appears to influence how people conceptualise the passage of time, but there was no evidence for downstream effects on intertemporal preferences. Additionally, exploratory analysis indicated that greater perceived control over time was associated with lower temporal discounting, mediated by a reduction in perceived wait time, suggesting a possible area for future research into individual differences and interventions in intertemporal decision-making.
MeSH term(s)	Humans ; Reward ; Delay Discounting/physiology ; Time Perception/physiology ; Emotions ; Individuality
Language	English
Publishing date	2024-04-05
Publishing country	United States
Document type	Randomized Controlled Trial ; Journal Article
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0301781
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Engineered molecular sensors for quantifying cell surface crowding.

Takatori, Sho C / Son, Sungmin / Lee, Daniel S W / Fletcher, Daniel A

Proceedings of the National Academy of Sciences of the United States of America

2023 Volume 120, Issue 21, Page(s) e2219778120

Abstract: Cells mediate interactions with the extracellular environment through a crowded assembly of transmembrane proteins, glycoproteins and glycolipids on their plasma membrane. The extent to which surface crowding modulates the biophysical interactions of ... ...

Abstract	Cells mediate interactions with the extracellular environment through a crowded assembly of transmembrane proteins, glycoproteins and glycolipids on their plasma membrane. The extent to which surface crowding modulates the biophysical interactions of ligands, receptors, and other macromolecules is poorly understood due to the lack of methods to quantify surface crowding on native cell membranes. In this work, we demonstrate that physical crowding on reconstituted membranes and live cell surfaces attenuates the effective binding affinity of macromolecules such as IgG antibodies in a surface crowding-dependent manner. We combine experiment and simulation to design a crowding sensor based on this principle that provides a quantitative readout of cell surface crowding. Our measurements reveal that surface crowding decreases IgG antibody binding by 2 to 20 fold in live cells compared to a bare membrane surface. Our sensors show that sialic acid, a negatively charged monosaccharide, contributes disproportionately to red blood cell surface crowding via electrostatic repulsion, despite occupying only ~1% of the total cell membrane by mass. We also observe significant differences in surface crowding for different cell types and find that expression of single oncogenes can both increase and decrease crowding, suggesting that surface crowding may be an indicator of both cell type and state. Our high-throughput, single-cell measurement of cell surface crowding may be combined with functional assays to enable further biophysical dissection of the cell surfaceome.
MeSH term(s)	Cell Membrane/metabolism ; Membrane Proteins/metabolism ; Macromolecular Substances/metabolism ; Erythrocytes/metabolism
Chemical Substances	Membrane Proteins ; Macromolecular Substances
Language	English
Publishing date	2023-05-15
Publishing country	United States
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	209104-5
ISSN	1091-6490 ; 0027-8424
ISSN (online)	1091-6490
ISSN	0027-8424
DOI	10.1073/pnas.2219778120
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1148: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Low-Fidelity Assembly of Influenza A Virus Promotes Escape from Host Cells.

Vahey, Michael D / Fletcher, Daniel A

Cell

2020 Volume 180, Issue 1, Page(s) 205

Language	English
Publishing date	2020-01-07
Publishing country	United States
Document type	Published Erratum
ZDB-ID	187009-9
ISSN	1097-4172 ; 0092-8674
ISSN (online)	1097-4172
ISSN	0092-8674
DOI	10.1016/j.cell.2019.12.028
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1167: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
Zs.MG 58: Show issues

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Opening up autism research: Bringing open research methods to our field.

Hobson, Hannah / Poole, Daniel / Pearson, Amy / Fletcher-Watson, Sue

Autism : the international journal of research and practice

2022 Volume 26, Issue 5, Page(s) 1011–1013

MeSH term(s)	Autism Spectrum Disorder ; Autistic Disorder ; Humans ; Research Design
Language	English
Publishing date	2022-07-28
Publishing country	England
Document type	Editorial ; Research Support, Non-U.S. Gov't
ZDB-ID	1338513-6
ISSN	1461-7005 ; 1362-3613
ISSN (online)	1461-7005
ISSN	1362-3613
DOI	10.1177/13623613221105385
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 5838: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (2.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Low-Fidelity Assembly of Influenza A Virus Promotes Escape from Host Cells.

Vahey, Michael D / Fletcher, Daniel A

Cell

2019 Volume 176, Issue 3, Page(s) 678

Language	English
Publishing date	2019-01-22
Publishing country	United States
Document type	Published Erratum
ZDB-ID	187009-9
ISSN	1097-4172 ; 0092-8674
ISSN (online)	1097-4172
ISSN	0092-8674
DOI	10.1016/j.cell.2019.01.009
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1167: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
Zs.MG 58: Show issues

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Bottom-Up Biology: Harnessing Engineering to Understand Nature.

Fletcher, Daniel A

Developmental cell

2016 Volume 38, Issue 6, Page(s) 587–589

Abstract: Engineering as a field has fundamentally different goals than biology, but the perspective that engineers take-that systems can be designed and built-is helping to advance biological sciences by motivating and equipping efforts to construct biological ... ...

Abstract	Engineering as a field has fundamentally different goals than biology, but the perspective that engineers take-that systems can be designed and built-is helping to advance biological sciences by motivating and equipping efforts to construct biological systems from the bottom up.
MeSH term(s)	Bioengineering/trends ; Genetic Engineering ; Models, Biological ; Systems Biology/trends
Language	English
Publishing date	2016-09-19
Publishing country	United States
Document type	Journal Article
ZDB-ID	2054967-2
ISSN	1878-1551 ; 1534-5807
ISSN (online)	1878-1551
ISSN	1534-5807
DOI	10.1016/j.devcel.2016.09.009
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 5742: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (2.OG) ab Jg. 2022: Lesesaal (EG)
Zs.MG 76: Show issues

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Digital spatial profiling of intraductal papillary mucinous neoplasms: Toward a molecular framework for risk stratification.

Iyer, Matthew K / Shi, Chanjuan / Eckhoff, Austin M / Fletcher, Ashley / Nussbaum, Daniel P / Allen, Peter J

Science advances

2023 Volume 9, Issue 11, Page(s) eade4582

Abstract: The histopathologic heterogeneity of intraductal papillary mucinous neoplasms (IPMN) complicates the prediction of pancreatic ductal adenocarcinoma (PDAC) risk. Intratumoral regions of pancreaticobiliary (PB), intestinal (INT), and gastric foveolar (GF) ... ...

Abstract	The histopathologic heterogeneity of intraductal papillary mucinous neoplasms (IPMN) complicates the prediction of pancreatic ductal adenocarcinoma (PDAC) risk. Intratumoral regions of pancreaticobiliary (PB), intestinal (INT), and gastric foveolar (GF) epithelium may occur with either low-grade dysplasia (LGD) or high-grade dysplasia (HGD). We used digital spatial RNA profiling of dysplastic epithelium (83 regions) from surgically resected IPMN tissues (12 patients) to differentiate subtypes and predict genes associated with malignancy. The expression patterns of PB and GF lesions diverged from INT, suggesting that PB and GF arise from a common lineage. Transcriptional dysregulation within PB lesions mirrored that of PDAC, whereas INT and GF foci did not. Tumor necrosis factor/nuclear factor κB (TNF-NFκB) and cell cycle (cycling S and cycling G
MeSH term(s)	Humans ; Pancreatic Intraductal Neoplasms/genetics ; Pancreatic Neoplasms/genetics ; Pancreatic Neoplasms/pathology ; Carcinoma, Pancreatic Ductal/genetics ; Carcinoma, Pancreatic Ductal/pathology ; Neoplasms, Cystic, Mucinous, and Serous ; Risk Assessment ; Pancreatic Neoplasms
Language	English
Publishing date	2023-03-17
Publishing country	United States
Document type	Journal Article
ZDB-ID	2810933-8
ISSN	2375-2548 ; 2375-2548
ISSN (online)	2375-2548
ISSN	2375-2548
DOI	10.1126/sciadv.ade4582
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Perspective: Biochemical and Physical Constraints Associated With Preparing Thin Specimens for Single-Particle Cryo-EM.

Han, Bong-Gyoon / Armstrong, Max / Fletcher, Daniel A / Glaeser, Robert M

Frontiers in molecular biosciences

2022 Volume 9, Page(s) 864829

Abstract: While many aspects of single-particle electron cryo-microscopy (cryo-EM) of biological macromolecules have reached a sophisticated level of development, this is not yet the case when it comes to preparing thin samples on specimen grids. As a result, ... ...

Abstract	While many aspects of single-particle electron cryo-microscopy (cryo-EM) of biological macromolecules have reached a sophisticated level of development, this is not yet the case when it comes to preparing thin samples on specimen grids. As a result, there currently is considerable interest in achieving better control of both the sample thickness and the amount of area that is useful, but this is only one aspect in which improvement is needed. This Perspective addresses the further need to prevent the macromolecular particles from making contact with the air-water interface, something that can result in preferential orientation and even structural disruption of macromolecular particles. This unwanted contact can occur either as the result of free diffusion of particles during the interval between application, thinning and vitrification of the remaining buffer, or-when particles have been immobilized-by the film of buffer becoming too thin prior to vitrification. An opportunity now exists to apply theoretical and practical insights from the fields of thin-film physical chemistry and interfacial science, in an effort to bring cryo-EM sample preparation to a level of sophistication that is comparable to that of current data collection and analysis.
Language	English
Publishing date	2022-04-26
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2814330-9
ISSN	2296-889X
ISSN	2296-889X
DOI	10.3389/fmolb.2022.864829
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Pickleball- and Paddleball-Related Injuries in the Lower Extremity: Description, Treatment Options, and Return to Play.

Opara, Olivia A / Brush, Parker L / Pohl, Nicholas / Fras, Sebastian / Aita, Daren / Hornstein, Joshua / Fletcher, Daniel / Parekh, Selene

Cureus

2024 Volume 16, Issue 2, Page(s) e53954

Abstract: Background Pickleball and paddleball are the fastest-growing sports in the United States. However, there are limited studies on the types of lower extremity injuries and treatment options in an outpatient clinic setting. Hypothesis/purpose This study ... ...

Abstract	Background Pickleball and paddleball are the fastest-growing sports in the United States. However, there are limited studies on the types of lower extremity injuries and treatment options in an outpatient clinic setting. Hypothesis/purpose This study reports the incidence rate, treatments, and return-to-play (RTP) outcomes for patients presenting to a single orthopedic outpatient center with pickleball- and paddleball-related lower extremity injuries. Study design This study is a retrospective case series, with level IV evidence. Methods A database search of our multispecialty electronic medical record (EMR) system from 2015 to 2023 identified 166 patients with outpatient pickleball- and paddleball-related lower extremity injuries. The retrospective data were reviewed for patient demographics, injury type, mechanism of injury, surgical or non-surgical treatment, and return-to-play recommendations. Results We observed that the majority of the patients with pickleball- and paddleball-related injuries in the lower extremities were over 60 years of age, with more males. Additionally, most injuries encountered were ankle sprain/strain from a twisting mechanism, which was treated non-surgically. Additionally, a significant number of patients suffered an Achilles tendon rupture (12.0%), which was treated surgically with an Achilles tendon repair (88.1%), accounting for the most common surgical treatment performed in this study. Of the 166 patients who were seen and treated, 68 (40.9%) returned to play, and 93 (56.3%) were lost to follow-up. Conclusion Most of these injuries were seen in the older population and caused by a sprain or strain due to sudden changes in direction, which were treated non-surgically. The most common surgical treatment was an Achilles tendon repair due to an Achilles tendon rupture. Although a relatively good number of patients were cleared to return to play, some patients were lost to follow-up. Meanwhile, some patients were advised to stop playing pickleball or paddleball due to the severity of their injuries. As this sport continues to rise in popularity and with the incidence rate of lower extremity injuries increasing over time, orthopedic surgeons should be aware of the types of injuries, treatment options, and outcomes, as well as ways to advise patients on prevention. Therefore, further research on the standard treatments and outcomes of pickleball- and paddleball-related injuries in the lower extremities is encouraged.
Language	English
Publishing date	2024-02-10
Publishing country	United States
Document type	Journal Article
ZDB-ID	2747273-5
ISSN	2168-8184
ISSN	2168-8184
DOI	10.7759/cureus.53954
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

To top

Full text online

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito