scholarly journals Bioorthogonal cyclization-mediated in situ self-assembly of small-molecule probes for imaging caspase activity in vivo

2014 ◽  
Vol 6 (6) ◽  
pp. 519-526 ◽  
Author(s):  
Deju Ye ◽  
Adam J. Shuhendler ◽  
Lina Cui ◽  
Ling Tong ◽  
Sui Seng Tee ◽  
...  
Keyword(s):  
Small Molecule ◽  
Self Assembly ◽  
Caspase Activity ◽  
Small Molecule Probes

Recent advances in stimuli-responsive in situ self-assembly of small molecule probes for in vivo imaging of enzymatic activity

2021 ◽  
Author(s):  
Yuqi Wang ◽  
Jianhui Weng ◽  
Xidan Wen ◽  
Yuxuan Hu ◽  
Deju Ye
Keyword(s):  
Enzymatic Activity ◽  
Small Molecule ◽  
Self Assembly ◽  
In Vivo Imaging ◽  
Molecular Probes ◽  
Stimuli Responsive ◽  
Small Molecule Probes ◽  
Recent Advances

Stimuli-responsive in situ self-assembly of small molecule probes into nanostructures has been promising for the construction of molecular probes for in vivo imaging.

In vitro and in vivo polysaccharides assembly: ultrastructural and cytochemical study of growing plant cell wall components.

1978 ◽  
Vol 36 (2) ◽  
pp. 434-435
Author(s):  
D. Reis ◽  
B. Vian ◽  
J. C. Roland
Keyword(s):  
Cell Wall ◽  
Self Assembly ◽  
Plant Cell Wall ◽  
Higher Plants ◽  
Three Dimensional ◽  
Cytochemical Study ◽  
Wall Components

Wall morphogenesis in higher plants is a problem still open to controversy. Until now the possibility of a transmembrane control and the involvement of microtubules were mostly envisaged. Self-assembly processes have been observed in the case of walls of Chlamydomonas and bacteria. Spontaneous gelling interactions between xanthan and galactomannan from Ceratonia have been analyzed very recently. The present work provides indications that some processes of spontaneous aggregation could occur in higher plants during the formation and expansion of cell wall.Observations were performed on hypocotyl of mung bean (Phaseolus aureus) for which growth characteristics and wall composition have been previously defined.In situ, the walls of actively growing cells (primary walls) show an ordered three-dimensional organization (fig. 1). The wall is typically polylamellate with multifibrillar layers alternately transverse and longitudinal. Between these layers intermediate strata exist in which the orientation of microfibrils progressively rotates. Thus a progressive change in the morphogenetic activity occurs.

scholarly journals Development of In Situ Self-Assembly Nanoparticles to Encapsulate Lopinavir and Ritonavir for Long-Acting Subcutaneous Injection

Pharmaceutics ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 904
Author(s):  
Irin Tanaudommongkon ◽  
Asama Tanaudommongkon ◽  
Xiaowei Dong
Keyword(s):  
Sustained Release ◽  
Trough Concentration ◽  
Self Assembly ◽  
Subcutaneous Injection ◽  
Drug Loading ◽  
Entrapment Efficiency ◽  
Long Acting

Most antiretroviral medications for human immunodeficiency virus treatment and prevention require high levels of patient adherence, such that medications need to be administered daily without missing doses. Here, a long-acting subcutaneous injection of lopinavir (LPV) in combination with ritonavir (RTV) using in situ self-assembly nanoparticles (ISNPs) was developed to potentially overcome adherence barriers. The ISNP approach can improve the pharmacokinetic profiles of the drugs. The ISNPs were characterized in terms of particle size, drug entrapment efficiency, drug loading, in vitro release study, and in vivo pharmacokinetic study. LPV/RTV ISNPs were 167.8 nm in size, with a polydispersity index of less than 0.35. The entrapment efficiency was over 98% for both LPV and RTV, with drug loadings of 25% LPV and 6.3% RTV. A slow release rate of LPV was observed at about 20% on day 5, followed by a sustained release beyond 14 days. RTV released faster than LPV in the first 5 days and slower than LPV thereafter. LPV trough concentration remained above 160 ng/mL and RTV trough concentration was above 50 ng/mL after 6 days with one subcutaneous injection. Overall, the ISNP-based LPV/RTV injection showed sustained release profiles in both in vitro and in vivo studies.

Controlled self-assembly of small molecule probes and the related applications in bioanalysis

2016 ◽  
Vol 76 ◽  
pp. 38-53 ◽  
Author(s):  
Yongxin Li ◽  
Huipeng Zhou ◽  
Jian Chen ◽  
Sohail Anjum Shahzad ◽  
Cong Yu
Keyword(s):  
Small Molecule ◽  
Self Assembly ◽  
Small Molecule Probes

scholarly journals Visualizing Borrelia burgdorferi infection using a small molecule imaging probe.

2021 ◽  
Author(s):  
Madeline G Sell ◽  
David A. Alcorta ◽  
Andrew E. Padilla ◽  
Dakota W. Nollner ◽  
Nicole R. Hasenkampf ◽  
...  
Keyword(s):  
Small Molecule ◽  
Bacterial Infections ◽  
Antimicrobial Agents ◽  
Infection Model ◽  
Bacterial Protein ◽  
Logarithmic Growth Phase ◽  
Protein Targets ◽  
Non Invasive ◽  
Small Molecule Probes

In vivo diagnostic imaging of bacterial infections is currently reliant on targeting their metabolic pathways, an ineffective method to identify microbial species with low metabolic activity. Here we establish HS-198 as a small molecule-fluorescent conjugate that selectively targets the highly conserved bacterial protein, HtpG (High temperature protein G), within B. burgdorferi, the bacterium responsible for Lyme Disease. We describe the use of HS-198 to target morphologic forms of B. burgdorferi in both the logarithmic growth phase and the metabolically dormant stationary phase as well as in inactivated spirochetes. Furthermore, in a murine infection model, systemically injected HS-198 identified B. burgdorferi as revealed by imaging in post necropsy tissue sections. These findings demonstrate how small molecule probes directed at conserved bacterial protein targets can function to identify the microbe using non-invasive imaging and potentially as scaffolds to deliver antimicrobial agents to the pathogen.

scholarly journals Visualizing Borrelia burgdorferi infection using a small molecule imaging probe

2020 ◽  
Author(s):  
Madeline G Sell ◽  
David A. Alcorta ◽  
Andrew E. Padilla ◽  
Dakota W. Nollner ◽  
Nicole R. Hasenkampf ◽  
...  
Keyword(s):  
Small Molecule ◽  
Bacterial Infections ◽  
Antimicrobial Agents ◽  
Infection Model ◽  
Bacterial Protein ◽  
Logarithmic Growth Phase ◽  
Protein Targets ◽  
Non Invasive ◽  
Small Molecule Probes

AbstractIn vivo diagnostic imaging of bacterial infections is currently reliant on targeting their metabolic pathways, an ineffective method to identify microbial species with low metabolic activity. Here we establish HS-198 as a small molecule-fluorescent conjugate that selectively targets the highly conserved bacterial protein, HtpG (High temperature protein G), within B. burgdorferi, the bacteria responsible for Lyme Disease. We describe the use of HS-198 to target morphologic forms of B. burgdorferi in both the logarithmic growth phase and the metabolically dormant stationary phase. Furthermore, in a murine infection model, systemically injected HS-198 identified B. burgdorferi as revealed by imaging in post necropsy tissue sections. These findings demonstrate how small molecule probes directed at conserved bacterial protein targets can function to identify the microbe using non-invasive imaging and potentially as scaffolds to deliver antimicrobial agents to the pathogen.

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