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Avrov KO, Shatik SV, Zaitsev VV, Al-Shehadat RI, Shashkova OA, Terekhina LA, Malakhov IS, Samoylovich MP. Application of Magnetic Particles for Fast Determination of Immunoreactive Fraction of 68Ga-Labelled VHH Antibodies to PD-L1. Sovrem Tekhnologii Med 2023; 15:26-33. [PMID: 38435480 PMCID: PMC10904357 DOI: 10.17691/stm2023.15.3.03] [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] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Indexed: 03/05/2024] Open
Abstract
Quantification of the immunoreactive fraction (IRF) of radioactive isotope-labeled antibodies or their fragments is necessary to assess the specific activity of radiopharmaceuticals. Traditionally, cells expressing the target molecules on their surface are used to determine IRF, but such analysis is time-consuming and has difficulties with standardization. The aim of the study was to develop a fast and reliable method for quantitative determination of IRF by 68Ga-labeled VHH antibodies to PD-L1 based on the use of magnetic particles coated with antigen molecules. Materials and Methods Commercially available magnetic particles coated with protein A have been used in our study. The antigen conjugated with the Fc fragment (PD-L1-Fc) was immobilized on the particles. The IRF value of 68Ga radionuclide-labeled nanobodies (VHH) against PD-L1 (68Ga-VHH-PD-L1) was determined using magnetic particles coated with antigen molecules and cells expressing the antigen on their surface. When VHH antibodies were conjugated to 68Ga radionuclide, protein molecules were modified using bifunctional chelating agents: tetraazacyclododecanetetraacetic acid (DOTA) or deferoxamine (DFO). The magnitude of IRF was defined as the ratio of radioactivity specifically bound to particles or cells to the total radioactivity added to the sample. Results The specificity of the 68Ga-VHH-PD-L1 radioimmunoconjugate binding to the antigen-coated magnetic particles has been proved. Some special aspects, which should be taken into consideration when using this method, have been established. The comparison of the IRF estimates using the antigen-expressing cells and magnetic particles has not revealed any significant differences in the results obtained in our study. Nevertheless, the presented method based on magnetic particles with immobilized antigen molecules requires only 15 min to determine the radioimmunoconjugate IRF, which is of fundamental importance for the routine assessment of the specificity of radiopharmaceuticals containing short-lived isotopes.
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Affiliation(s)
- K O Avrov
- Senior Researcher, Laboratory of Hybridome Technology; A.M. Granov Russian Research Center of Radiology and Surgical Technologies of the Ministry of Health of the Russian Federation, 70 Leningradskaya St., Saint Petersburg, Pesochniy Settlement, 197758, Russia
| | - S V Shatik
- Head of the Department of Cyclotron-Produced Radiopharmaceuticals; A.M. Granov Russian Research Center of Radiology and Surgical Technologies of the Ministry of Health of the Russian Federation, 70 Leningradskaya St., Saint Petersburg, Pesochniy Settlement, 197758, Russia
| | - V V Zaitsev
- Head of the Group for Radiopharmaceuticals Synthesis; Leading Technologist, Department of Cyclotron-Produced Radiopharmaceuticals; A.M. Granov Russian Research Center of Radiology and Surgical Technologies of the Ministry of Health of the Russian Federation, 70 Leningradskaya St., Saint Petersburg, Pesochniy Settlement, 197758, Russia
| | - R I Al-Shehadat
- General Director; Innova plus LLC, 13 Kalinina St., Lit. A, Office 18-N, Saint Petersburg, 197198, Russia
| | - O A Shashkova
- Senior Researcher, Laboratory of Hybridome Technology; A.M. Granov Russian Research Center of Radiology and Surgical Technologies of the Ministry of Health of the Russian Federation, 70 Leningradskaya St., Saint Petersburg, Pesochniy Settlement, 197758, Russia
| | - L A Terekhina
- Researcher, Laboratory of Hybridome Technology; A.M. Granov Russian Research Center of Radiology and Surgical Technologies of the Ministry of Health of the Russian Federation, 70 Leningradskaya St., Saint Petersburg, Pesochniy Settlement, 197758, Russia
| | - I S Malakhov
- Senior Researcher, Laboratory of Hybridome technology; A.M. Granov Russian Research Center of Radiology and Surgical Technologies of the Ministry of Health of the Russian Federation, 70 Leningradskaya St., Saint Petersburg, Pesochniy Settlement, 197758, Russia
| | - M P Samoylovich
- Chief Researcher; Head of the Laboratory of Hybridome technology; A.M. Granov Russian Research Center of Radiology and Surgical Technologies of the Ministry of Health of the Russian Federation, 70 Leningradskaya St., Saint Petersburg, Pesochniy Settlement, 197758, Russia
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Gorshkov NI, Shatik SV, Tokarev AV, Gavrilova II, Nazarova OV, Murko AY, Krasikov VD, Panarin EF. Synthesis of complexes of N-vinylpyrrolidone–vinylamine or N-vinylpyrrolidone–allylamine containing macrocyclic polyligand 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate (DOTA) with gallium-68 isotope and estimation of their in vivo distribution. Russ Chem Bull 2017. [DOI: 10.1007/s11172-017-1714-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chudakov VM, Zhuikov BL, Ermolaev SV, Kokhanyuk VM, Mostova MI, Zaitsev VV, Shatik SV, Kostenikov NA, Ryzhkova DV, Tyutin LA. Characterization of a 82Rb generator for positron emission tomography. Radiochemistry 2014. [DOI: 10.1134/s1066362214050142] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shevtsov MA, Shatik SV, Mostova MI, Tiutin LA, Bychkova NV, Mikhrina AL, Onokhin KV, Meshalkina DA, Romanova IV, Savchenko ON, Ivanova AA, Abkin SV, Kharatian VA, Guzhova IV, Margulis BA. [Biodistribution of the recombinant heat shock protein rhHsp70 in intracranial C6 glioma models in Wistar rats and subcutaneos B16/F10 melanoma in C57BL/6 mice]. Vopr Onkol 2013; 59:78-83. [PMID: 23814854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
For the first time, the biodistribution of recombinant heat shock protein in rhHsp70 rats with grafted intracranial C6 glioma was evaluated. It was assessed using the fluorescent antibody accumulation chaperone rhHsp70 conjugated with fluorochrome Alexa Fluor 555 in tumor cells by intratumoral or intravenous administration. Assessment of the distribution and accumulation of labeled protein was carried out on the model of subcutaneous B16/F10 melanoma in C57BL/6 mice with the use of single-photon emission computer tomography. After 60 minutes after intravenous administration rhHsp70-I123 (20 MBq, 5 mg chaperone) accumulation of the drug mainly in the liver and tumor tissue was showed. The coefficient of the differential accumulation of the labeled protein KDN(tumor/background) was 3.14. It was turned out that comparing the level of fixation of rhHsp70-I123 in the liver and the tumor KDN(tumor/ liver) = 0.76. After 24 hours from the time of injection of rhHsp70-I123 it was observed increase the level of fixation of the labeled protein in the liver and melanoma: KDN(tumor/background) = 3.43; KDN(tumor/liver = 0.78.
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Granov AM, Tiutin LA, Ryzhkova DV, Shkol'nik MI, Andabekov TT, Mostova MI, Shatik SV, Kostenikov NA, Zaĭtsev VV, Tlostanova MS, Stanzhevskiĭ AA, Panfilenko AA, Arzumanov AA, Metelëv VV, Iliushchenko IR. [First experience of using positron emission tomography with 11C-choline in prostate cancer (PC)]. Vopr Onkol 2013; 59:460-464. [PMID: 24032219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Introduction into clinical practice of combined positron emission technology and computer tomography (PET/CT) allows in one study to identify structural and functional abnormalities. The study involves 32 patients who underwent PET/CT with "C-choline, including 5 patients with prostate cancer (PC), 3--with chronic prostatitis and 24--with biochemical PC recurrence. PET/CT with 11C-choline has a high diagnostic efficacy in detection of local recurrence and PC metastases in patients with biochemical PC recurrence. The results of visual analysis do not permit to distinguish PC from benign prostate diseases.
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Fedorova OS, Kuznetsova OF, Shatik SV, Stepanova MA, Belokon' IN, Maleev VI, Krasikova RN. [(18)F-labeled tyrosine derivatives: synthesis and experimental studies on accumulation in tumors and abscesses]. Bioorg Khim 2009; 35:334-43. [PMID: 19621048 DOI: 10.1134/s1068162009030042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Tyrosine derivatives labeled with a short-living fluorine 18 isotope (T(1/2) 110 min), namely 2-[(18)F]fluoro-L-tyrosine (FTYR) and O-(2'-[(18)F]fluoroethyl)-L-tyrosine (FET), promising radiopharmaceutical products (RPP) for positron emission tomography (PET), were obtained by asymmetric synthesis. Accumulation of FTYR and FET in the rat tumor "35 rat glioma" and in abscesses induced in Vistar mouse muscles was studied and compared with that of a well-known glycolysis radiotracer 2-[(18)F]fluoro-2-deoxy-D-glucose (FDG). It was shown that the relative accumulation indices of amino acid RPP were considerably lower than those of FDG. At the same time, tumor/muscle ratios were high enough (2.9 for FET and 3.9 for FTYR 120 min after injection) for reliable tumor visualization. The data obtained indicated a possibility in principle to use FTYR and FET for differentiated PET diagnostics of brain tumors and inflammation lesions. Of the tyrosine derivatives studied, FET seems to be the most promising agent due to a simple and easily automated method of preparation based on direct nucleophilic substitution of the leaving tosyloxy group of an enantiomerically pure Ni-(S)-BPB-(S)-Tyr(CH2CH2OTs) precursor by an activated [(18)F]fluoride.
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Affiliation(s)
- O S Fedorova
- Institute of the Human Brain, Russian Academy of Sciences, ul. Akademika Pavlova 9, St. Petersburg, 197376 Russia
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Shestakova SA, Stepanov II, Eliseeva AP, Shatik SV, Tishkovskaia IA, Klimenko MV. [The influence of intracysternal insulin administration on the rat temporal behaviour dynamics]. Ross Fiziol Zh Im I M Sechenova 2008; 94:871-887. [PMID: 18825928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Rat behaviour in the open field and elevated plus-maze was analyzed in rats after intracysternal administration of 2.5, 25, 50 and 200 ng of insulin in 45 min, 24 hrs and on the 9th day after single injection. Dose-dependent changes in 45 min occurred in both behavioural tests: insulin in low doses (2.5 and 25 ng) increased probability of locomotion and investigative activity in open field, while insulin in high doses (50 and 200 ng) did not alter locomotor activity and showed tendency to weakening of the investigative behavior (especially in the dose of 50 ng). Tendency was found in 24 hrs to increase probability of investigative behavior in open field after injection of 25 ng of insulin, although on the 9th day after insulin administration this behaviour increased in all experimental groups for all used doses. Insulin in the doses 2.5 and 200 ng decreased anxiety in elevated plus-maze in 45 min during the first five min; the doses 2.5 and 25 ng at the second five min exerted the same effect. In 24 hrs, the anxiety level increased for the doses 50 and 200 ng, and there was a tendency for an increase in the doses 2.5 and 25 ng; anxiety was decreased on the 9th day for all used doses of insulin. Thus, single insulin administration induced weakness of non-associative memory in open field on the day 2 and day 9 as well as increase of anxiety level on the day 2 and decrease of anxiety level on the day 9 in elevated plus-maze.
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Shestakova SA, Stepanov II, Eliseeva AP, Shatik SV, Fedorova NV, Klimenko VM. [Dose-dependent effects of intracisternally administered insulin on rat's behavior and glucose level]. Ross Fiziol Zh Im I M Sechenova 2007; 93:264-74. [PMID: 17598469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Rat behavior in the open field and elevated plus-maze as well as glycaemia level were analyzed in rats after intracisternal administration of 2.5, 25, 50 and 200 ng of insulin. Dose-dependent changes were found in both behavioral tests: insulin in low doses (2.5 and 25 ng) increased probability of locomotion and investigative activity in open field, while insulin in high doses (50 and 200 ng) did not alter locomotor activity and showed tendency to weakening of the investigative behavior (especially in the dose of 50 ng). Significant decrease of rat anxiety level during the first 5 minutes of testing was found after administration of 2.5 and 200 ng of insulin and during the next 5 minutes after administration of 2.5 and 25 ng of insulin in elevated plus-maze. The glucose level in rats was increased in 1-2 hours after insulin administration, though glycaemia level did not exceed normal values. Thus revealed alterations of behavior are supposed to be the result of direct insulin influence on central mechanisms of activation and/or suppression of underlying behavioral characteristics of animals.
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Fedorova OS, Kuznetsova OF, Mosevich IK, Shatik SV, Kataeva GV, Belokon’ YN, Krasikova RN. Synthesis of 2-[18F]Fluoro-L-tyrosine and comparative study of its uptake by rat glioma 35 tumor and by induced inflammation focus in experimental animals. Radiochemistry 2006. [DOI: 10.1134/s1066362206050201] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Krasikova RN, Zaitsev VV, Ametamey SM, Kuznetsova OF, Fedorova OS, Mosevich IK, Belokon YN, Vyskocil S, Shatik SV, Nader M, Schubiger PA. Catalytic enantioselective synthesis of 18F-fluorinated α-amino acids under phase-transfer conditions using (s)-NOBIN. Nucl Med Biol 2004; 31:597-603. [PMID: 15219278 DOI: 10.1016/j.nucmedbio.2003.12.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We describe a new method for the asymmetric synthesis of [(18)F]fluorinated aromatic alpha-amino acids (FAA) under phase transfer conditions using achiral glycine derivative NiPBPGly and (S)-NOBIN as a novel substrate/catalyst pair. The key alkylation step proceeds under mild conditions. Substituted [(18)F]fluorobenzylbromides were prepared using nucleophilic [(18)F]fluoride and were used as alkylation agents. Two important FAA, 2-[(18)F]fluoro-L-tyrosine (2-FTYR) and 6-[(18)F]fluoro-L-3,4-dihydroxyphenylalanine (6-FDOPA), were synthesized with an ee of 92 and 96%, respectively. The total synthesis time was 110-120 min and radiochemical yields (d.c.) were 25+/-6% for 2-FTYR and 16+/-5% for 6-FDOPA.
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Affiliation(s)
- R N Krasikova
- Institute of Human Brain, Russian Academy of Science, 9, Pavlov strasse, 197376, St.-Petersburg, Russia
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Alekseeva LA, Shatik SV, Sorokina MN, Karasev VV. [Chromatographic analysis of low molecular weight fraction of cerebrospinal fluid in children with acute neuroinfections]. Klin Lab Diagn 2002:15-9. [PMID: 12085699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Low molecular-weight (oligopeptide) fraction of the cerebrospinal fluid was analyzed by high-performance reversed phase liquid chromatography in 30 children with bacterial and viral neuroinfections. The incidence and height of chromathoraphic peaks in bacterial meningitis depended on the disease etiology, stage, and severity. Qualitative and quantitative composition of low molecular-weight fraction of the liquor varied in patients with viral neuroinfections, depending on the severity of the cerebral parenchyma involvement. Differences in chromatographic profiles in complicated and uneventful course of neuroinfections indicate a possible damaging, protective, or regulatory effect of the liquor peptides. These data focus the attention on the role of oligopeptides in the genesis of neuroinfectious process, significance of search for peptide markers, their further isolation, identification, and development of test systems available for clinical application.
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Iakimovskiĭ AF, Shatik SV, Chivileva OG, Gorbachevskaia AI. [The effect on rat behavior of phenamine contained in a cannula chronically implanted in the neostriatum]. Zh Vyssh Nerv Deiat Im I P Pavlova 1996; 46:335-41. [PMID: 8726567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Avoidance conditioning in a shuttle-box was studied in rats under conditions of daily three-week amphetamine microinjections (45 mcg) into the rostral striatum and in rats with chronically implanted intrastriatal amphetamine-containing cannulae (45 mgg/0.75 mcl). Amphetamine stimulatory behavioural effects were recorded in both groups of animals (improvement of avoidance conditioning, stereotyped hyperactivity etc.). The dopaminomimetic effects in rats with implanted cannulae were less expressed than in those with daily injections. High chemical stability of cannulated amphetamine was demonstrated by means of HPLC technique. Neurodegenerative changes were described in the loci of amphetamine administration similar to those in its long-lasting systemic injections. The methodological problems are discussed which are essential for neuropharmacological studies of behaviour.
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Shatik SV, Iakimovskiĭ AF, Bobrova IV. [The chemical stability of enkephalin-like tetrapeptides in a cannula implanted in the rat neostriatum for multiple microinjections]. Fiziol Zh Im I M Sechenova 1995; 81:105-8. [PMID: 7581553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Vartanian GA, Shatik SV, Tokarev AV, Klement'ev BI. [The activity of postural asymmetry factors in symmetrical sections of the rat spinal cord]. Biull Eksp Biol Med 1989; 107:404-7. [PMID: 2720148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The distribution of the low-molecular weight and high-molecular weight postural asymmetry factors (FPA) activity in the left and right parts of the lumbal region of the rat spinal cord was studied. Low-molecular weight FPA induces flexion of the hind limb ipsilateral to the half of the spinal cord from which FPA was isolated, while high-molecular weight FPA induces contralateral flexion. The activities of the low- and high-molecular weight FPAs in each half of the spinal cord are comparable in normal rat. After the suction lesion of the motor areas in the left hemisphere the increase of the low-molecular weight FPA activity in the right half of the lumbal region of the spinal cord was observed.
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Vartanian GA, Varlinskaia EI, Shatik SV, Tokarev AV, Cherniaev SG. [The structural specificity of factors in the chemical regulation of muscle tonus at the spinal cord level]. Biull Eksp Biol Med 1989; 107:268-71. [PMID: 2713460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The chemical factors of the postural asymmetry (FPA) were studied on the recipients without hemispheres. The structural specificity of the fore and hind limb spinal centers regulation in normal and damaged CNS was observed. In the normal CNS this structural specificity was displayed in the selective activation of the cross-situated hemicenters in the cervical and lumbal regions (for example in the left part of the cervical and in the right part of the lumbal region). In the case of the unilateral lesion of the central motor systems the normal pattern of chemical structural specificity was modified by activation of FPA selectively acting on the partly denervated regions of the spinal cord.
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Vartanyan GA, Varlinskaya EI, Shatik SV, Tokarev AV, Chernyaev SG, Klement'ev BI. Structural specificity of factors involved in chemical regulation of muscle tone at the spinal level. Bull Exp Biol Med 1989. [DOI: 10.1007/bf00842035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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