1
|
Mukhametshina AR, Fedorenko SV, Petrov AM, Zakyrjanova GF, Petrov KA, Nurullin LF, Nizameev IR, Mustafina AR, Sinyashin OG. Targeted Nanoparticles for Selective Marking of Neuromuscular Junctions and ex Vivo Monitoring of Endogenous Acetylcholine Hydrolysis. ACS Appl Mater Interfaces 2018; 10:14948-14955. [PMID: 29652477 DOI: 10.1021/acsami.8b04471] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The present work for the first time introduces nanosensors for luminescent monitoring of acetylcholinesterase (AChE)-catalyzed hydrolysis of endogenous acetylcholine (ACh) released in neuromuscular junctions of isolated muscles. The sensing function results from the quenching of Tb(III)-centered luminescence due to proton-induced degradation of luminescent Tb(III) complexes doped into silica nanoparticles (SNs, 23 nm), when acetic acid is produced from the enzymatic hydrolysis of ACh. The targeting of the silica nanoparticles by α-bungarotoxin was used for selective staining of the synaptic space in the isolated muscles by the nanosensors. The targeting procedure was optimized for the high sensing sensitivity. The measuring of the Tb(III)-centered luminescence intensity of the targeted SNs by fluorescent microscopy enables us to sense a release of endogenous ACh in neuromuscular junctions of the isolated muscles under their stimulation by a high-frequency train (20 Hz, for 3 min). The ability of the targeted SNs to sense an inhibiting effect of paraoxon on enzymatic activity of AChE in ex vivo conditions provides a way of mimicking external stimuli effects on enzymatic processes in the isolated muscles.
Collapse
Affiliation(s)
- Alsu R Mukhametshina
- Arbuzov Institute of Organic and Physical Chemistry , FRC Kazan Scientific Center of RAS , Arbuzov Str. 8 , 420088 Kazan , Russian Federation
| | - Svetlana V Fedorenko
- Arbuzov Institute of Organic and Physical Chemistry , FRC Kazan Scientific Center of RAS , Arbuzov Str. 8 , 420088 Kazan , Russian Federation
| | - Alexey M Petrov
- Kazan State Medial University , Butlerov Str. 49 , 420012 Kazan , Russian Federation
- Kazan Institute of Biochemistry and Biophysics , Federal Research Center "Kazan Scientific Center of RAS" , P.O. Box 30 , 420111 Kazan , Russian Federation
| | - Guzel F Zakyrjanova
- Kazan Institute of Biochemistry and Biophysics , Federal Research Center "Kazan Scientific Center of RAS" , P.O. Box 30 , 420111 Kazan , Russian Federation
| | - Konstantin A Petrov
- Arbuzov Institute of Organic and Physical Chemistry , FRC Kazan Scientific Center of RAS , Arbuzov Str. 8 , 420088 Kazan , Russian Federation
| | - Leniz F Nurullin
- Kazan Institute of Biochemistry and Biophysics , Federal Research Center "Kazan Scientific Center of RAS" , P.O. Box 30 , 420111 Kazan , Russian Federation
| | - Irek R Nizameev
- Arbuzov Institute of Organic and Physical Chemistry , FRC Kazan Scientific Center of RAS , Arbuzov Str. 8 , 420088 Kazan , Russian Federation
| | - Asiya R Mustafina
- Arbuzov Institute of Organic and Physical Chemistry , FRC Kazan Scientific Center of RAS , Arbuzov Str. 8 , 420088 Kazan , Russian Federation
| | - Oleg G Sinyashin
- Arbuzov Institute of Organic and Physical Chemistry , FRC Kazan Scientific Center of RAS , Arbuzov Str. 8 , 420088 Kazan , Russian Federation
| |
Collapse
|
2
|
Mukhametshina A, Petrov A, Fedorenko S, Petrov K, Nizameev I, Mustafina A, Sinyashin O. Luminescent nanoparticles for rapid monitoring of endogenous acetylcholine release in mice atria. LUMINESCENCE 2018; 33:588-593. [PMID: 29377578 DOI: 10.1002/bio.3450] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 11/20/2017] [Accepted: 12/11/2017] [Indexed: 01/06/2023]
Abstract
The present work introduces for the first time a nanoparticulate approach for ex vivo monitoring of acetylcholinesterase-catalyzed hydrolysis of endogenous acetylcholine released from nerve varicosities in mice atria. Amino-modified 20-nm size silica nanoparticles (SNs) doped by luminescent Tb(III) complexes were applied as the nanosensors. Their sensing capacity results from the decreased intensity of Tb(III)-centred luminescence due to the quenching effect of acetic acid derived from acetylcholinesterase-catalyzed hydrolysis of acetylcholine. Sensitivity of the SNs in monitoring acetylcholine hydrolysis was confirmed by in vitro experiments. Isolated atria were exposed to the nanosensors for 10 min to stain cell membranes. Acetylcholine hydrolysis was monitored optically in the atria samples by measuring quenching of Tb(III)-centred luminescence by acetic acid derived from endogenous acetylcholine due to its acetylcholinesterase-catalyzed hydrolysis. The reliability of the sensing was demonstrated by the quenching effect of exogenous acetylcholine added to the bath solution. Additionally, no luminescence quenching occurred when the atria were pre-treated with the acetylcholinesterase inhibitor paraoxon.
Collapse
Affiliation(s)
- Alsu Mukhametshina
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
| | - Alexey Petrov
- Department of Normal Physiology, Kazan State Medial University, Kazan, Russian Federation.,Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, Russian Academy of Sciences, Kazan, Russian Federation
| | - Svetlana Fedorenko
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
| | - Konstantin Petrov
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
| | - Irek Nizameev
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
| | - Asiya Mustafina
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
| | - Oleg Sinyashin
- A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
| |
Collapse
|