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Orlov NA, Kryukova EV, Efremenko AV, Yakimov SA, Toporova VA, Kirpichnikov MP, Nekrasova OV, Feofanov AV. Interactions of the Kv1.1 Channel with Peptide Pore Blockers: A Fluorescent Analysis on Mammalian Cells. Membranes (Basel) 2023; 13:645. [PMID: 37505011 PMCID: PMC10383195 DOI: 10.3390/membranes13070645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/23/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023]
Abstract
The voltage-gated potassium channel Kv1.1, which is abundant in the CNS and peripheral nervous system, controls neuronal excitability and neuromuscular transmission and mediates a number of physiological functions in non-excitable cells. The development of some diseases is accompanied by changes in the expression level and/or activity of the channels in particular types of cells. To meet the requirements of studies related to the expression and localization of the Kv1.1 channels, we report on the subnanomolar affinity of hongotoxin 1 N-terminally labeled with Atto 488 fluorophore (A-HgTx) for the Kv1.1 channel and its applicability for fluorescent imaging of the channel in living cells. Taking into consideration the pharmacological potential of the Kv1.1 channel, a fluorescence-based analytical system was developed for the study of peptide ligands that block the ion conductivity of Kv1.1 and are potentially able to correct abnormal activity of the channel. The system is based on analysis of the competitive binding of the studied compounds and A-HgTx to the mKate2-tagged human Kv1.1 (S369T) channel, expressed in the plasma membrane of Neuro2a cells. The system was validated by measuring the affinities of the known Kv1.1-channel peptide blockers, such as agitoxin 2, kaliotoxin 1, hongotoxin 1, and margatoxin. Peptide pore blocker Ce1, from the venom of the scorpion Centruroides elegans, was shown to possess a nanomolar affinity for the Kv1.1 channel. It is reported that interactions of the Kv1.1 channel with the studied peptide blockers are not affected by the transition of the channel from the closed to open state. The conclusion is made that the structural rearrangements accompanying the channel transition into the open state do not change the conformation of the P-loop (including the selectivity filter) involved in the formation of the binding site of the peptide pore blockers.
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Affiliation(s)
- Nikita A Orlov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
- Faculty of Biology, Lomonosov Moscow State University, 119234 Moscow, Russia
| | - Elena V Kryukova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Anastasia V Efremenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Sergey A Yakimov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Victoria A Toporova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Mikhail P Kirpichnikov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
- Faculty of Biology, Lomonosov Moscow State University, 119234 Moscow, Russia
| | - Oksana V Nekrasova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
| | - Alexey V Feofanov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
- Faculty of Biology, Lomonosov Moscow State University, 119234 Moscow, Russia
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Argentova VV, Aliev TK, Zarubaev VV, Klotchenko SA, Shtro AA, Sergeeva MV, Toporova VA, Dolgikh DA, Sveshnikov PG, Vasin VA, Kirpichnikov MP. [In vitro Antiviral Activity of Recombinant Antibodies of IgG and IgA Isotypes to Hemagglutinin of the Influenza A Virus]. Mol Biol (Mosk) 2018; 51:927-937. [PMID: 29271957 DOI: 10.7868/s0026898417060052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 04/28/2017] [Accepted: 06/26/2017] [Indexed: 11/23/2022]
Abstract
Seasonal and highly infectious strains of the influenza A and influenza B viruses cause millions of cases of severe complications in elderly people, children, and patients with immune diseases each year. Immunoglobulin A (IgA), which is an active component of humoral immunity, can prevent the spread of the virus in the upper respiratory tract. The preparation and study of the properties of recombinant virus-specific IgA could be an important approach to finding new means of preventing and treating influenza. Based on CHO DG44 cells, we developed stable monoclonal cell lines that produce monomeric and dimeric antibodies FI6-IgA1 and FI6-IgA2m1 to hemagglutinin (HA) of the influenza A virus. When studying the productivity, growth, and stability of the obtained clones, we found that the dimeric form of antibodies of IgA1 isotype is superior to other forms. The dimeric form of IgA antibodies plays a key role in mucosal immunity. Recognizing the prospects of using dimeric IgA as prophylactic and therapeutic mucosal drugs for viral infections, we studied their virus-neutralizing and antiviral activities on MDCK cell culture and compared them with the antibodies of the IgG1 isotype. This study presents the data on antiviral and virus-neutralizing activities of the FI6-IgA1 dimers to seasonal and highly infectious strains of influenza A virus.
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Affiliation(s)
- V V Argentova
- Department of Bioengineering, Faculty of Biology, Moscow State University, Moscow, 119234 Russia.,
| | - T K Aliev
- Department of Chemical Enzymology, Faculty of Chemistry, Moscow State University, Moscow, 119234 Russia
| | - V V Zarubaev
- Research Institute of Influenza, Ministry of Healthcare of the Russian Federation, St. Petersburg, 197376 Russia
| | - S A Klotchenko
- Research Institute of Influenza, Ministry of Healthcare of the Russian Federation, St. Petersburg, 197376 Russia
| | - A A Shtro
- Research Institute of Influenza, Ministry of Healthcare of the Russian Federation, St. Petersburg, 197376 Russia
| | - M V Sergeeva
- Research Institute of Influenza, Ministry of Healthcare of the Russian Federation, St. Petersburg, 197376 Russia
| | - V A Toporova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997 Russia
| | - D A Dolgikh
- Department of Bioengineering, Faculty of Biology, Moscow State University, Moscow, 119234 Russia.,Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997 Russia
| | - P G Sveshnikov
- Russian Research Center for Molecular Diagnostics and Therapy, Moscow, 117149 Russia
| | - V A Vasin
- Research Institute of Influenza, Ministry of Healthcare of the Russian Federation, St. Petersburg, 197376 Russia
| | - M P Kirpichnikov
- Department of Bioengineering, Faculty of Biology, Moscow State University, Moscow, 119234 Russia.,Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997 Russia
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Aliev TK, Dement'eva IG, Toporova VA, Argentova VV, Pozdnyakova LP, Bokov MN, Dolgikh DA, Sveshnikov PG, Kirpichnikov MP. The Development and Inmmunochemical Properties of the Dimer of Immunoglobulin A Specific to the Influenza Virus A Hemagglutinin. DOKL BIOCHEM BIOPHYS 2018. [PMID: 29536306 DOI: 10.1134/s160767291801009x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We obtained dimeric forms of IgA1- and IgA2m1-isotypes of FI6 antibody broadly specific to hemagglutinins of different subtypes of influenza A virus. It was shown that the dimers of IgA1 isotype are characterized by a higher antigen-binding activity compared to the IgA2m1 dimers. The affinity of IgA1 dimers to the strains of the H1N1 subtype is higher than that of the H3N2 subtype, which correlates with the properties of the parental human FI6 antibody.
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Affiliation(s)
- T K Aliev
- Faculty of Biology, Moscow State University, Moscow, 119991, Russia.
| | - I G Dement'eva
- All-Russia Research Center of Molecular Diagnostics and Therapy, Moscow, 117149, Russia
| | - V A Toporova
- All-Russia Research Center of Molecular Diagnostics and Therapy, Moscow, 117149, Russia
| | - V V Argentova
- Faculty of Biology, Moscow State University, Moscow, 119991, Russia
| | - L P Pozdnyakova
- All-Russia Research Center of Molecular Diagnostics and Therapy, Moscow, 117149, Russia
| | - M N Bokov
- All-Russia Research Center of Molecular Diagnostics and Therapy, Moscow, 117149, Russia
| | - D A Dolgikh
- Faculty of Biology, Moscow State University, Moscow, 119991, Russia.,Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - P G Sveshnikov
- All-Russia Research Center of Molecular Diagnostics and Therapy, Moscow, 117149, Russia
| | - M P Kirpichnikov
- Faculty of Biology, Moscow State University, Moscow, 119991, Russia.,Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
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Nekrasov AN, Petrovskaya LE, Toporova VA, Kryukova EA, Rodina AV, Moskaleva EY, Kirpichnikov MP. Design of a novel interleukin-13 antagonist from analysis of informational structure. Biochemistry (Mosc) 2009; 74:399-405. [PMID: 19463093 DOI: 10.1134/s0006297909040075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Interleukin-13 (IL-13) is one of the cytokines involved in the development of Th2-type immune response. It plays an important role in the pathogenesis of asthma and other allergic diseases. Two deletion forms of IL-13 were constructed on a basis of informational structure analysis and expressed in E. coli cells. They were found to differ in ability to stimulate proliferation of TF-1 cell line. Deletion variant 146 (DV146) completely lacks such activity, whereas DV148 provides about 50% of the proliferation stimulation. The simultaneous addition of DV146 with full-length IL-13 suppresses proliferation depending on the concentration of the deletion form. Thus, the designed protein acts as an antagonist of IL-13.
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Affiliation(s)
- A N Nekrasov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia.
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