Effect of a radiolabel biochemical nature on tumor-targeting properties of EpCAM-binding engineered scaffold protein DARPin Ec1
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15.02.2020 |
Deyev S.
Vorobyeva A.
Schulga A.
Abouzayed A.
Günther T.
Garousi J.
Konovalova E.
Ding H.
Gräslund T.
Orlova A.
Tolmachev V.
|
International Journal of Biological Macromolecules |
10.1016/j.ijbiomac.2019.12.147 |
0 |
Ссылка
© 2018 The Authors Radionuclide-based imaging of molecular therapeutic targets might facilitate stratifying patients for specific biotherapeutics. New type of imaging probes, based on designed ankyrin repeat proteins (DARPins), have demonstrated excellent contrast of imaging of human epidermal growth factor type 2 (HER2) expression in preclinical models. We hypothesized that labeling approaches, which result in lipophilic radiometabolites (non-residualizing labels), would provide the best imaging contrast for DARPins that internalize slowly after binding to cancer cells. The hypothesis was tested using DARPin Ec1 that binds to epithelial cell adhesion molecule (EpCAM). EpCAM is a promising therapeutic target. Ec1 was labeled with 125I using two methods to obtain the non-residualizing labels, while residualizing labels were obtained by labeling it with 99mTc. All labeled Ec1 variants preserved target specificity and picomolar binding affinity to EpCAM-expressing pancreatic adenocarcinoma BxPC-3 cells. In murine models, all the variants provided similar tumor uptake. However, 125I-PIB-H6-Ec1 had noticeably lower retention in normal tissues, which provided appreciably higher tumor-to-organ ratios. Furthermore, 125I-PIB-H6-Ec1 demonstrated the highest imaging contrast in preclinical models than any other EpCAM-imaging agent tested so far. In conclusion, DARPin Ec1 in combination with a non-residualizing label is a promising probe for imaging EpCAM expression a few hours after injection.
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тезис
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Effect of a radiolabel biochemical nature on tumor-targeting properties of EpCAM-binding engineered scaffold protein DARPin Ec1
|
15.02.2020 |
Deyev S.
Vorobyeva A.
Schulga A.
Abouzayed A.
Günther T.
Garousi J.
Konovalova E.
Ding H.
Gräslund T.
Orlova A.
Tolmachev V.
|
International Journal of Biological Macromolecules |
10.1016/j.ijbiomac.2019.12.147 |
0 |
Ссылка
© 2018 The Authors Radionuclide-based imaging of molecular therapeutic targets might facilitate stratifying patients for specific biotherapeutics. New type of imaging probes, based on designed ankyrin repeat proteins (DARPins), have demonstrated excellent contrast of imaging of human epidermal growth factor type 2 (HER2) expression in preclinical models. We hypothesized that labeling approaches, which result in lipophilic radiometabolites (non-residualizing labels), would provide the best imaging contrast for DARPins that internalize slowly after binding to cancer cells. The hypothesis was tested using DARPin Ec1 that binds to epithelial cell adhesion molecule (EpCAM). EpCAM is a promising therapeutic target. Ec1 was labeled with 125I using two methods to obtain the non-residualizing labels, while residualizing labels were obtained by labeling it with 99mTc. All labeled Ec1 variants preserved target specificity and picomolar binding affinity to EpCAM-expressing pancreatic adenocarcinoma BxPC-3 cells. In murine models, all the variants provided similar tumor uptake. However, 125I-PIB-H6-Ec1 had noticeably lower retention in normal tissues, which provided appreciably higher tumor-to-organ ratios. Furthermore, 125I-PIB-H6-Ec1 demonstrated the highest imaging contrast in preclinical models than any other EpCAM-imaging agent tested so far. In conclusion, DARPin Ec1 in combination with a non-residualizing label is a promising probe for imaging EpCAM expression a few hours after injection.
Читать
тезис
|
Effect of a radiolabel biochemical nature on tumor-targeting properties of EpCAM-binding engineered scaffold protein DARPin Ec1
|
15.02.2020 |
Deyev S.
Vorobyeva A.
Schulga A.
Abouzayed A.
Günther T.
Garousi J.
Konovalova E.
Ding H.
Gräslund T.
Orlova A.
Tolmachev V.
|
International Journal of Biological Macromolecules |
10.1016/j.ijbiomac.2019.12.147 |
0 |
Ссылка
© 2018 The Authors Radionuclide-based imaging of molecular therapeutic targets might facilitate stratifying patients for specific biotherapeutics. New type of imaging probes, based on designed ankyrin repeat proteins (DARPins), have demonstrated excellent contrast of imaging of human epidermal growth factor type 2 (HER2) expression in preclinical models. We hypothesized that labeling approaches, which result in lipophilic radiometabolites (non-residualizing labels), would provide the best imaging contrast for DARPins that internalize slowly after binding to cancer cells. The hypothesis was tested using DARPin Ec1 that binds to epithelial cell adhesion molecule (EpCAM). EpCAM is a promising therapeutic target. Ec1 was labeled with 125I using two methods to obtain the non-residualizing labels, while residualizing labels were obtained by labeling it with 99mTc. All labeled Ec1 variants preserved target specificity and picomolar binding affinity to EpCAM-expressing pancreatic adenocarcinoma BxPC-3 cells. In murine models, all the variants provided similar tumor uptake. However, 125I-PIB-H6-Ec1 had noticeably lower retention in normal tissues, which provided appreciably higher tumor-to-organ ratios. Furthermore, 125I-PIB-H6-Ec1 demonstrated the highest imaging contrast in preclinical models than any other EpCAM-imaging agent tested so far. In conclusion, DARPin Ec1 in combination with a non-residualizing label is a promising probe for imaging EpCAM expression a few hours after injection.
Читать
тезис
|
Effect of a radiolabel biochemical nature on tumor-targeting properties of EpCAM-binding engineered scaffold protein DARPin Ec1
|
15.02.2020 |
Deyev S.
Vorobyeva A.
Schulga A.
Abouzayed A.
Günther T.
Garousi J.
Konovalova E.
Ding H.
Gräslund T.
Orlova A.
Tolmachev V.
|
International Journal of Biological Macromolecules |
10.1016/j.ijbiomac.2019.12.147 |
0 |
Ссылка
© 2018 The Authors Radionuclide-based imaging of molecular therapeutic targets might facilitate stratifying patients for specific biotherapeutics. New type of imaging probes, based on designed ankyrin repeat proteins (DARPins), have demonstrated excellent contrast of imaging of human epidermal growth factor type 2 (HER2) expression in preclinical models. We hypothesized that labeling approaches, which result in lipophilic radiometabolites (non-residualizing labels), would provide the best imaging contrast for DARPins that internalize slowly after binding to cancer cells. The hypothesis was tested using DARPin Ec1 that binds to epithelial cell adhesion molecule (EpCAM). EpCAM is a promising therapeutic target. Ec1 was labeled with 125I using two methods to obtain the non-residualizing labels, while residualizing labels were obtained by labeling it with 99mTc. All labeled Ec1 variants preserved target specificity and picomolar binding affinity to EpCAM-expressing pancreatic adenocarcinoma BxPC-3 cells. In murine models, all the variants provided similar tumor uptake. However, 125I-PIB-H6-Ec1 had noticeably lower retention in normal tissues, which provided appreciably higher tumor-to-organ ratios. Furthermore, 125I-PIB-H6-Ec1 demonstrated the highest imaging contrast in preclinical models than any other EpCAM-imaging agent tested so far. In conclusion, DARPin Ec1 in combination with a non-residualizing label is a promising probe for imaging EpCAM expression a few hours after injection.
Читать
тезис
|
Effect of a radiolabel biochemical nature on tumor-targeting properties of EpCAM-binding engineered scaffold protein DARPin Ec1
|
15.02.2020 |
Deyev S.
Vorobyeva A.
Schulga A.
Abouzayed A.
Günther T.
Garousi J.
Konovalova E.
Ding H.
Gräslund T.
Orlova A.
Tolmachev V.
|
International Journal of Biological Macromolecules |
10.1016/j.ijbiomac.2019.12.147 |
0 |
Ссылка
© 2018 The Authors Radionuclide-based imaging of molecular therapeutic targets might facilitate stratifying patients for specific biotherapeutics. New type of imaging probes, based on designed ankyrin repeat proteins (DARPins), have demonstrated excellent contrast of imaging of human epidermal growth factor type 2 (HER2) expression in preclinical models. We hypothesized that labeling approaches, which result in lipophilic radiometabolites (non-residualizing labels), would provide the best imaging contrast for DARPins that internalize slowly after binding to cancer cells. The hypothesis was tested using DARPin Ec1 that binds to epithelial cell adhesion molecule (EpCAM). EpCAM is a promising therapeutic target. Ec1 was labeled with 125I using two methods to obtain the non-residualizing labels, while residualizing labels were obtained by labeling it with 99mTc. All labeled Ec1 variants preserved target specificity and picomolar binding affinity to EpCAM-expressing pancreatic adenocarcinoma BxPC-3 cells. In murine models, all the variants provided similar tumor uptake. However, 125I-PIB-H6-Ec1 had noticeably lower retention in normal tissues, which provided appreciably higher tumor-to-organ ratios. Furthermore, 125I-PIB-H6-Ec1 demonstrated the highest imaging contrast in preclinical models than any other EpCAM-imaging agent tested so far. In conclusion, DARPin Ec1 in combination with a non-residualizing label is a promising probe for imaging EpCAM expression a few hours after injection.
Читать
тезис
|
Effect of a radiolabel biochemical nature on tumor-targeting properties of EpCAM-binding engineered scaffold protein DARPin Ec1
|
15.02.2020 |
Deyev S.
Vorobyeva A.
Schulga A.
Abouzayed A.
Günther T.
Garousi J.
Konovalova E.
Ding H.
Gräslund T.
Orlova A.
Tolmachev V.
|
International Journal of Biological Macromolecules |
10.1016/j.ijbiomac.2019.12.147 |
0 |
Ссылка
© 2018 The Authors Radionuclide-based imaging of molecular therapeutic targets might facilitate stratifying patients for specific biotherapeutics. New type of imaging probes, based on designed ankyrin repeat proteins (DARPins), have demonstrated excellent contrast of imaging of human epidermal growth factor type 2 (HER2) expression in preclinical models. We hypothesized that labeling approaches, which result in lipophilic radiometabolites (non-residualizing labels), would provide the best imaging contrast for DARPins that internalize slowly after binding to cancer cells. The hypothesis was tested using DARPin Ec1 that binds to epithelial cell adhesion molecule (EpCAM). EpCAM is a promising therapeutic target. Ec1 was labeled with 125I using two methods to obtain the non-residualizing labels, while residualizing labels were obtained by labeling it with 99mTc. All labeled Ec1 variants preserved target specificity and picomolar binding affinity to EpCAM-expressing pancreatic adenocarcinoma BxPC-3 cells. In murine models, all the variants provided similar tumor uptake. However, 125I-PIB-H6-Ec1 had noticeably lower retention in normal tissues, which provided appreciably higher tumor-to-organ ratios. Furthermore, 125I-PIB-H6-Ec1 demonstrated the highest imaging contrast in preclinical models than any other EpCAM-imaging agent tested so far. In conclusion, DARPin Ec1 in combination with a non-residualizing label is a promising probe for imaging EpCAM expression a few hours after injection.
Читать
тезис
|
Effect of a radiolabel biochemical nature on tumor-targeting properties of EpCAM-binding engineered scaffold protein DARPin Ec1
|
15.02.2020 |
Deyev S.
Vorobyeva A.
Schulga A.
Abouzayed A.
Günther T.
Garousi J.
Konovalova E.
Ding H.
Gräslund T.
Orlova A.
Tolmachev V.
|
International Journal of Biological Macromolecules |
10.1016/j.ijbiomac.2019.12.147 |
0 |
Ссылка
© 2018 The Authors Radionuclide-based imaging of molecular therapeutic targets might facilitate stratifying patients for specific biotherapeutics. New type of imaging probes, based on designed ankyrin repeat proteins (DARPins), have demonstrated excellent contrast of imaging of human epidermal growth factor type 2 (HER2) expression in preclinical models. We hypothesized that labeling approaches, which result in lipophilic radiometabolites (non-residualizing labels), would provide the best imaging contrast for DARPins that internalize slowly after binding to cancer cells. The hypothesis was tested using DARPin Ec1 that binds to epithelial cell adhesion molecule (EpCAM). EpCAM is a promising therapeutic target. Ec1 was labeled with 125I using two methods to obtain the non-residualizing labels, while residualizing labels were obtained by labeling it with 99mTc. All labeled Ec1 variants preserved target specificity and picomolar binding affinity to EpCAM-expressing pancreatic adenocarcinoma BxPC-3 cells. In murine models, all the variants provided similar tumor uptake. However, 125I-PIB-H6-Ec1 had noticeably lower retention in normal tissues, which provided appreciably higher tumor-to-organ ratios. Furthermore, 125I-PIB-H6-Ec1 demonstrated the highest imaging contrast in preclinical models than any other EpCAM-imaging agent tested so far. In conclusion, DARPin Ec1 in combination with a non-residualizing label is a promising probe for imaging EpCAM expression a few hours after injection.
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тезис
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European Association of Urology Guidelines on Non-muscle-invasive Bladder Cancer (TaT1 and Carcinoma In Situ) - 2019 Update
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01.11.2019 |
Babjuk M.
Burger M.
Compérat E.
Gontero P.
Mostafid A.
Palou J.
van Rhijn B.
Rouprêt M.
Shariat S.
Sylvester R.
Zigeuner R.
Capoun O.
Cohen D.
Escrig J.
Hernández V.
Peyronnet B.
Seisen T.
Soukup V.
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European Urology |
10.1016/j.eururo.2019.08.016 |
2 |
Ссылка
© 2019 Context: This overview presents the updated European Association of Urology (EAU) guidelines for non–muscle-invasive bladder cancer (NMIBC), TaT1, and carcinoma in situ (CIS). Objective: To provide practical recommendations on the clinical management of NMIBC with a focus on clinical presentation and recommendations. Evidence acquisition: A broad and comprehensive scoping exercise covering all areas of the NMIBC guidelines has been performed annually since the last published version in 2017. Databases covered by the search included Medline, EMBASE, and the Cochrane Libraries. Previous guidelines were updated, and the level of evidence and grade of recommendation were assigned. Evidence synthesis: Tumours staged as Ta, T1, and/or CIS are grouped under the heading of NMIBC. Diagnosis depends on cystoscopy and histological evaluation of the tissue obtained by transurethral resection (TURB) in papillary tumours or by multiple bladder biopsies in CIS. In papillary lesions, a complete TURB is essential for the patient's prognosis and correct diagnosis. Where the initial resection is incomplete, where there is no muscle in the specimen, or where a T1 tumour is detected, a second TURB should be performed within 2–6 wk. The risks of both recurrence and progression may be estimated for individual patients using the European Organisation for Research and Treatment of Cancer (EORTC) scoring system. Stratification of patients into low-, intermediate-, and high-risk groups is pivotal to the recommendation of adjuvant treatment. In patients with tumours presumed to be at a low risk and in those presumed to be at an intermediate risk with a low previous recurrence rate and an expected EORTC recurrence score of <5, one immediate chemotherapy instillation is recommended. Patients with intermediate-risk tumours should receive 1 yr of full-dose bacillus Calmette-Guérin (BCG) intravesical immunotherapy or instillations of chemotherapy for a maximum of 1 yr. In patients with high-risk tumours, full-dose intravesical BCG for 1–3 yr is indicated. In patients at the highest risk of tumour progression, immediate radical cystectomy should be considered. Cystectomy is recommended in BCG-unresponsive tumours. The extended version of the guidelines is available at the EAU website: https://uroweb.org/guideline/non-muscle-invasive-bladder-cancer/. Conclusions: These abridged EAU guidelines present updated information on the diagnosis and treatment of NMIBC for incorporation into clinical practice. Patient summary: The European Association of Urology Non–muscle-invasive Bladder Cancer (NMIBC) Panel has released an updated version of their guidelines, which contains information on classification, risk factors, diagnosis, prognostic factors, and treatment of NMIBC. The recommendations are based on the current literature (until the end of 2018), with emphasis on high-level data from randomised clinical trials and meta-analyses. Stratification of patients into low-, intermediate-, and high-risk groups is essential for deciding appropriate use of adjuvant intravesical chemotherapy or bacillus Calmette-Guérin (BCG) instillations. Surgical removal of the bladder should be considered in case of BCG-unresponsive tumours or in NMIBCs with the highest risk of progression.
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Role of a receptor-like kinase K1 in pea Rhizobium symbiosis development
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01.11.2018 |
Kirienko A.
Porozov Y.
Malkov N.
Akhtemova G.
Le Signor C.
Thompson R.
Saffray C.
Dalmais M.
Bendahmane A.
Tikhonovich I.
Dolgikh E.
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Planta |
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2 |
Ссылка
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Main conclusion: The LysM receptor-like kinase K1 is involved in regulation of pea-rhizobial symbiosis development. The ability of the crop legume Pisum sativum L. to perceive the Nod factor rhizobial signals may depend on several receptors that differ in ligand structure specificity. Identification of pea mutants defective in two types of LysM receptor-like kinases (LysM-RLKs), SYM10 and SYM37, featuring different phenotypic manifestations and impaired at various stages of symbiosis development, corresponds well to this assumption. There is evidence that one of the receptor proteins involved in symbiosis initiation, SYM10, has an inactive kinase domain. This implies the presence of an additional component in the receptor complex, together with SYM10, that remains unknown. Here, we describe a new LysM-RLK, K1, which may serve as an additional component of the receptor complex in pea. To verify the function of K1 in symbiosis, several P. sativum non-nodulating mutants in the k1 gene were identified using the TILLING approach. Phenotyping revealed the blocking of symbiosis development at an appropriately early stage, strongly suggesting the importance of LysM-RLK K1 for symbiosis initiation. Moreover, the analysis of pea mutants with weaker phenotypes provides evidence for the additional role of K1 in infection thread distribution in the cortex and rhizobia penetration. The interaction between K1 and SYM10 was detected using transient leaf expression in Nicotiana benthamiana and in the yeast two-hybrid system. Since the possibility of SYM10/SYM37 complex formation was also shown, we tested whether the SYM37 and K1 receptors are functionally interchangeable using a complementation test. The interaction between K1 and other receptors is discussed.
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Population-Based Analysis of Cluster Headache-Associated Genetic Polymorphisms
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01.07.2018 |
Katsarou M.
Papasavva M.
Latsi R.
Toliza I.
Gkaros A.
Papakonstantinou S.
Gatzonis S.
Mitsikostas D.
Kovatsi L.
Isotov B.
Tsatsakis A.
Drakoulis N.
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Journal of Molecular Neuroscience |
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2 |
Ссылка
© 2018, Springer Science+Business Media, LLC, part of Springer Nature. Cluster headache is a disorder with increased hereditary risk. Associations between cluster headache and polymorphism rs2653349 of the HCRTR2 gene have been demonstrated. The less common allele (A) seems to reduce disease susceptibility. The polymorphism rs5443 of the GNB3 gene positively influences triptan treatment response. Carriers of the mutated T allele are more likely to respond positively compared to C:C homozygotes, when treated with triptans. DNA was extracted from buccal swabs obtained from 636 non-related Southeastern European Caucasian individuals and was analyzed by real-time PCR. Gene distribution for the rs2653349 was G:G = 79.1%, G:A = 19.2%, and A:A = 1.7%. The frequency of the wild-type G allele was 88.7%. The frequencies for rs5443 were C:C = 44.0%, C:T = 42.6%, and T:T = 13.4%. The frequency of the wild-type C allele was 65.3%. The frequency distribution of rs2653349 in the Southeastern European Caucasian population differs significantly when compared with other European and East Asian populations, and the frequency distribution of rs5443 showed a statistically significant difference between Southeastern European Caucasian and African, South Asian, and East Asian populations. For rs2653349, a marginal statistically significant difference between genders was found (p = 0.080) for A:A versus G:G and G:A genotypes (OR = 2.78), indicating a higher representation of male homozygotes for the protective mutant A:A allele than female. No statistically significant difference was observed between genders for rs5443. Cluster headache pathophysiology and pharmacotherapy response may be affected by genetic factors, indicating the significant role of genotyping in the overall treatment effectiveness of cluster headaches.
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Legal rationale of biodiversity regulation as a basis of stable ecological policy
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01.06.2018 |
Zakharchenko N.
Hasanov S.
Yumashev A.
Admakin O.
Lintser S.
Antipina M.
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Journal of Environmental Management and Tourism |
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3 |
Ссылка
© 2018. ASERS Publishing. All rights reserved. The paper understands cross-border natural resources as a totality of characteristics of local ecological systems, which can act as regulators of human’s life space. Authors state that uniqueness of this phenomenon is defined by the fact that all natural resources act as a single system of planet scale. The problem distinguished in the paper is based on the fact that in the period of ecological systems and natural resources development a little attention is paid to cross-border management on the part of nations they belong to. The research subject is an indicator of stability and quality of management of cross-border natural resources in the aspect of their even existing and carrying out of their functions. Scientific novelty of the research is that it’s proved for the first time that each ecological system has s number of parameters, one of which shows how much it resistant to human impact. The system of providing biodiversity is one of such parameters. In the paper the legal characteristics of the issue are identified with the actual state of interstate cooperation and the opportunity of its expansion within the already existing interstate formation is determined. The example of such formation is European Union. The areas of further research can be defined as an expansion of specified cooperation of Asian and South American continent.
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Rationale for the application of surface-enhanced Raman scattering for identification of main pathogens of purulent-inflammatory diseases in maxillofacial area
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01.01.2018 |
Alexandrov M.
Margaryan E.
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Stomatologiia |
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0 |
Ссылка
The objective of the research was to elaborate experimental-theoretical and clinic-bacteriological rationale for the application of laser diagnostic for identification of main pathogens of purulent-inflammatory processes in maxillofacial area. For germs identification by giant Raman scattering effect SERS-substrate with nano silver metallic balls, reference strains (Ps. aeruginosa 27853 and S. aureus 25923) and clinical cultures of Staphylococcus, Bacillus and Escherichia coli were used. Using an example of purulent inflammation pathogens we considered that each of bacterial species is characterized by individual spectral lines of Raman scattering, which allows to identify them in short term (1-2 min). Moreover the proposed method is highly sensitive (105-106 CFU/ml). Creation of germs library and device portability makes use of laser diagnostic for express-indication purulent infections possible directly in clinical conditions. Thus, analytical capability, quick result, high sensitivity and peculiarity, economical effectiveness due to lack of necessity to use growth medium and to transport it to microbiological lab gives an opportunity to consider laser diagnostic as a perspective universal express-method of clinical microbiology.
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Facial nerve injury in neurosurgery: A rehabilitation potential of botulinum therapy
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01.01.2018 |
Akulov M.
Orlova O.
Tabashnikova T.
Karnaukhov V.
Orlova A.
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Zhurnal Voprosy Nejrokhirurgii Imeni N.N. Burdenko |
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1 |
Ссылка
© 2018 Media Sphera Publishing Group. All Rights Reserved. Surgical treatment of posterior cranial fossa and cerebellopontine angle tumors is associated with a risk of facial nerve dysfunction. The causes for facial muscle paresis include nerve compression by the tumor, destruction of the nerve structure by the tumor growing from nerve fibers, nerve injury during surgical removal of the tumor, etc. The first 3 months after facial nerve injury are a potential therapeutic window for the use of botulinum toxin type A (BTA). During this period, the drug is introduced both in the healthy side to improve the facial symmetry at rest and during mimetic movements and in the affected side to induce drug-induced ptosis. Post-paralytic syndrome develops 4-6 months after facial nerve injury. At this stage, administration of BTA is also an effective procedure; in this case, drug injections are performed on the affected side at small doses and symmetrically on the healthy side at doses doubling those for the affected side. BTA injections are mandatory in complex treatment of facial muscle paralysis.
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Theology of decorum: Perspectives on women's external appearance among evangelical Christians-Baptists in the late- and post-Soviet periods
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01.01.2018 |
Beliakova N.
French A.
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Gosudarstvo, Religiia, Tserkov' v Rossii i za Rubezhom/State, Religion and Church in Russia and Worldwide |
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1 |
Ссылка
© 2018 Russian Presidential Academy of National Economy and Public Administration. All rights reserved. This article uses oral history interviews to examine the memory of believers from Evangelical Christian-Baptist (ECB) churches regarding the requirements for women's external appearance as a reflection of their personal piety. While discussing believers' memory of the late Soviet period, the article demonstrates that these congregations focused almost exclusively on women. The conviction that believers were not to reflect the "outside world" in appearance was actually a double standard for women, since women's fashion choices have been much more dynamic than men's in the Soviet and post-Soviet periods. The article discusses the historical and social significance of the emphasis on women's appearance, arguing that both a high view of scripture and a nostalgia for the "Soviet past" perpetuated the patriarchal norms held by both men and women in ECB congregations. The authors then utilize a series of historical photographs from the 1940s to the 1970s to demonstrate the scope of the transformation of ECB believers' memory, which did not always accurately reflect late-Soviet reality. The authors conclude that the extensive changes in the social order in general and in women's fashion in particular in the post-Soviet period strengthened believers' impulse to isolate themselves from the immoral "outside world." By following the accepted norms for their external appearance, ECB women's appearance becomes a marker of their faith and a visible sign of their piety that is so highly prized by their community.
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Atomic force microscopy of tissue sections is a useful complementary tool in biomedical morphological studies
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01.01.2018 |
Timashev P.
Koroleva A.
Konovalov N.
Kotova S.
Solovieva A.
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Sovremennye Tehnologii v Medicine |
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0 |
Ссылка
© 2018, Nizhny Novgorod State Medical Academy. All rights reserved. The aim of the study was to demonstrate a good diagnostic potential of atomic force microscopy (AFM) in tracking morphological changes in the extracellular matrix (ECM) of connective tissue due to pathological processes. Here we summarize our experience in AFM application in a number of biomedical studies on the connective tissue disease, both for the research and clinical purposes. Materials and Methods. Depending on the project application (experimental or clinical), the tissue specimens were harvested either from animals, or from patients in the course of their surgical treatment, or post mortem. AFM images of fixed tissue slices on glass slides were acquired with a Solver P47 AFM instrument (NT-MDT, Russia), in the semi-contact mode. For mechanical properties mapping, the images were acquired on air in the PeakForce Quantitative Nanomechanical Mapping mode (PeakForce QNM®), using a MultiMode 8 atomic force microscope (Bruker, USA). The regions of interest for scanning were selected in accordance with the histological assignments for the same sample, based on the view of a sample in the built-in optical microscope of the AFM instrument setup. To quantify the changes in the ECM morphology visualized by AFM imaging, we applied flicker-noise spectroscopy parameterization. Results. AFM has been shown to reveal visible deviations from the normal morphology of the ECM in diseased tissues. We found that AFM and related techniques are capable of tracking disease-related changes at different levels of collagen organization in the ECM. At the microscale, AFM may detect loosening and disorganization of collagen fibers (e.g., in a dysplastic process), or the opposite process of their packing into tight parallel bundles in a fibrotic process. AFM may also monitor the ratio between collagen and non-fibrous material of the ECM, for example, in inflammatory and neoplastic processes. At the level of collagen fibrils, AFM may reveal early signs of the matrix destruction and remodeling not visible at the microscopic level. The flicker-noise spectroscopy parameters provide quantification of the morphological changes visualized by AFM. The PeakForce QNM® and nanoindentation studies give a further insight into the state of ECM via tracking changes in the local mechanical and adhesive properties. All our AFM studies appeared in a good agreement with the histological findings and generally had a superior sensitivity to pathology-related ECM rearrangements. Conclusion. AFM may serve as a valuable complementary diagnostic tool for tracking pathological changes in the connective tissue.
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Influence of pea lectins on proliferative activity of peripheral blood mononuclear cells of healthy donors. ВЛИЯНИЕ ЛЕКТИНОВ ГОРОХА НА ПРОЛИФЕРАТИВНУЮ АКТИВНОСТЬ МОНОНУКЛЕАРНЫХ КЛЕТОК ПЕРИФЕРИЧЕСКОЙ КРОВИ ЗДОРОВЫХ ДОНОРОВ
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Зайчикова С. Г.
Черныш А.М.
Несвижский Юрий Владимирович
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Russian Journal of Biopharmaceuticals. БИОФАРМАЦЕВТИЧЕСКИЙ ЖУРНАЛ |
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Изучено влияние лектинов растительного происхождения на цитотоксическую активность мононуклеаров периферической крови (МНПК) здоровых доноров. Установлено, что лектин гороха вызывает статистически значимый цитотоксический эффект МНПК по отношению к клеткам колоректального рака.
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Публикация |
Role of a receptor-like kinase K1 in pea Rhizobium symbiosis development
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Порозов Юрий Борисович
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Planta |
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The LysM receptor-like kinase K1 is involved in regulation of pea-rhizobial symbiosis development.
The ability of the crop legume Pisum sativum L. to perceive the Nod factor rhizobial signals may depend on several receptors that differ in ligand structure specificity. Identification of pea mutants defective in two types of LysM receptor-like kinases (LysM-RLKs), SYM10 and SYM37, featuring different phenotypic manifestations and impaired at various stages of symbiosis development, corresponds well to this assumption. There is evidence that one of the receptor proteins involved in symbiosis initiation, SYM10, has an inactive kinase domain. This implies the presence of an additional component in the receptor complex, together with SYM10, that remains unknown. Here, we describe a new LysM-RLK, K1, which may serve as an additional component of the receptor complex in pea. To verify the function of K1 in symbiosis, several P. sativum non-nodulating mutants in the k1 gene were identified using the TILLING approach. Phenotyping revealed the blocking of symbiosis development at an appropriately early stage, strongly suggesting the importance of LysM-RLK K1 for symbiosis initiation. Moreover, the analysis of pea mutants with weaker phenotypes provides evidence for the additional role of K1 in infection thread distribution in the cortex and rhizobia penetration. The interaction between K1 and SYM10 was detected using transient leaf expression in Nicotiana benthamiana and in the yeast two-hybrid system. Since the possibility of SYM10/SYM37 complex formation was also shown, we tested whether the SYM37 and K1 receptors are functionally interchangeable using a complementation test. The interaction between K1 and other receptors is discussed.
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Role of a receptor-like kinase K1 in pea Rhizobium symbiosis development
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Порозов Юрий Борисович (Руководитель лабораторией биоинформатики, Доцент)
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Planta |
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The LysM receptor-like kinase K1 is involved in regulation of pea-rhizobial symbiosis development.
The ability of the crop legume Pisum sativum L. to perceive the Nod factor rhizobial signals may depend on several receptors that differ in ligand structure specificity. Identification of pea mutants defective in two types of LysM receptor-like kinases (LysM-RLKs), SYM10 and SYM37, featuring different phenotypic manifestations and impaired at various stages of symbiosis development, corresponds well to this assumption. There is evidence that one of the receptor proteins involved in symbiosis initiation, SYM10, has an inactive kinase domain. This implies the presence of an additional component in the receptor complex, together with SYM10, that remains unknown. Here, we describe a new LysM-RLK, K1, which may serve as an additional component of the receptor complex in pea. To verify the function of K1 in symbiosis, several P. sativum non-nodulating mutants in the k1 gene were identified using the TILLING approach. Phenotyping revealed the blocking of symbiosis development at an appropriately early stage, strongly suggesting the importance of LysM-RLK K1 for symbiosis initiation. Moreover, the analysis of pea mutants with weaker phenotypes provides evidence for the additional role of K1 in infection thread distribution in the cortex and rhizobia penetration. The interaction between K1 and SYM10 was detected using transient leaf expression in Nicotiana benthamiana and in the yeast two-hybrid system. Since the possibility of SYM10/SYM37 complex formation was also shown, we tested whether the SYM37 and K1 receptors are functionally interchangeable using a complementation test. The interaction between K1 and other receptors is discussed.
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Influence of pea lectins on proliferative activity of peripheral blood mononuclear cells of healthy donors. ВЛИЯНИЕ ЛЕКТИНОВ ГОРОХА НА ПРОЛИФЕРАТИВНУЮ АКТИВНОСТЬ МОНОНУКЛЕАРНЫХ КЛЕТОК ПЕРИФЕРИЧЕСКОЙ КРОВИ ЗДОРОВЫХ ДОНОРОВ
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Зайчикова С. Г. (Профессор)
Черныш А.М. (Профессор)
Несвижский Юрий Владимирович (Профессор)
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Russian Journal of Biopharmaceuticals. БИОФАРМАЦЕВТИЧЕСКИЙ ЖУРНАЛ |
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Изучено влияние лектинов растительного происхождения на цитотоксическую активность мононуклеаров периферической крови (МНПК) здоровых доноров. Установлено, что лектин гороха вызывает статистически значимый цитотоксический эффект МНПК по отношению к клеткам колоректального рака.
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