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Boutajangout, A., Lindberg, H., Awwad, A., Paul, A., Baitalmal, R., Almokyad, I., . . . Wisniewski, T. (2019). Affibody-Mediated Sequestration of Amyloid beta Demonstrates Preventive Efficacy in a Transgenic Alzheimer's Disease Mouse Model. Frontiers in Aging Neuroscience, 11, Article ID 64.
Open this publication in new window or tab >>Affibody-Mediated Sequestration of Amyloid beta Demonstrates Preventive Efficacy in a Transgenic Alzheimer's Disease Mouse Model
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2019 (English)In: Frontiers in Aging Neuroscience, ISSN 1663-4365, E-ISSN 1663-4365, Vol. 11, article id 64Article in journal (Refereed) Published
Abstract [en]

Different strategies for treatment and prevention of Alzheimer's disease (AD) are currently under investigation, including passive immunization with anti-amyloid beta (anti-A beta) monoclonal antibodies (mAbs). Here, we investigate the therapeutic potential of a novel type of A beta-targeting agent based on an affibody molecule with fundamentally different properties to mAbs. We generated a therapeutic candidate, denoted Z(SYM73)-albumin-binding domain (ABD; 16.8 kDa), by genetic linkage of the dimeric Z(SYM73) affibody for sequestering of monomeric A beta-peptides and an ABD for extension of its in vivo half-life. Amyloid precursor protein (APP)/PS1 transgenic AD mice were administered with Z(SYM73)-ABD, followed by behavioral examination and immunohistochemistry. Results demonstrated rescued cognitive functions and significantly lower amyloid burden in the treated animals compared to controls. No toxicological symptoms or immunology-related side-effects were observed. To our knowledge, this is the first reported in vivo investigation of a systemically delivered scaffold protein against monomeric A beta, demonstrating a therapeutic potential for prevention of AD.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2019
Keywords
Alzheimer's disease, affibody molecule, amyloid beta (A beta), behavior, histology, immunotherapy, transgenic mice
National Category
Geriatrics
Identifiers
urn:nbn:se:kth:diva-249880 (URN)10.3389/fnagi.2019.00064 (DOI)000462530400001 ()30967771 (PubMedID)
Note

QC 20190423

Available from: 2019-04-23 Created: 2019-04-23 Last updated: 2019-04-23Bibliographically approved
Andersson, K. G., Persson, J., Ståhl, S. & Löfblom, J. (2019). Autotransporter-Mediated Display of a Naive Affibody Library on the Outer Membrane of Escherichia coli. Biotechnology Journal, 14(4), Article ID 1800359.
Open this publication in new window or tab >>Autotransporter-Mediated Display of a Naive Affibody Library on the Outer Membrane of Escherichia coli
2019 (English)In: Biotechnology Journal, ISSN 1860-6768, E-ISSN 1860-7314, Vol. 14, no 4, article id 1800359Article in journal (Refereed) Published
Abstract [en]

Development of new affinity proteins using combinatorial protein engineering is today established for generation of monoclonal antibodies and also essential for discovery of binders that are based on non-immunoglobulin proteins. Phage display is most frequently used, but yeast display is becoming increasingly popular, partly due to the option of utilizing fluorescence-activated cell sorting (FACS) for isolation of new candidates. Escherichia coli has several valuable properties for library applications and in particular the high transformation efficiency. The use of various autotransporters and intimins for secretion and anchoring on the outer membrane have shown promising results and particularly for directed evolution of different enzymes. Here, the authors report on display of a large naive affibody library on the outer membrane of E. coli using the autotransporter Adhesin Involved in Diffuse Adherence (AIDA-I). The expression cassette is first engineered by removing non-essential sequences, followed by introduction of an affibody library, comprising more than 10(9) variants, into the new display vector. The quality of the library and general performance of the method is assessed by FACS against five different targets, which resulted in a panel of binders with down to nanomolar affinities, suggesting that the method has potential as a complement to phage display for generation of affibody molecules.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH, 2019
Keywords
affibody library, AIDA-I, autodisplay, bacterial display, directed evolution
National Category
Biological Sciences
Identifiers
urn:nbn:se:kth:diva-249806 (URN)10.1002/biot.201800359 (DOI)000462917100020 ()30179307 (PubMedID)2-s2.0-85053871994 (Scopus ID)
Note

QC 20190423

Available from: 2019-04-23 Created: 2019-04-23 Last updated: 2019-04-23Bibliographically approved
Dahlsson Leitao, C., Rinne, S. S., Mitran, B., Vorobyeva, A., Andersson, K. G., Tolmachev, V., . . . Orlova, A. (2019). Molecular Design of HER3-Targeting Affibody Molecules: Influence of Chelator and Presence of HEHEHE-Tag on Biodistribution of 68 Ga-Labeled Tracers. International Journal of Molecular Sciences, 20(5)
Open this publication in new window or tab >>Molecular Design of HER3-Targeting Affibody Molecules: Influence of Chelator and Presence of HEHEHE-Tag on Biodistribution of 68 Ga-Labeled Tracers
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2019 (English)In: International Journal of Molecular Sciences, ISSN 1422-0067, E-ISSN 1422-0067, Vol. 20, no 5Article in journal (Refereed) Published
Abstract [en]

Affibody-based imaging of HER3 is a promising approach for patient stratification. We investigated the influence of a hydrophilic HEHEHE-tag ((HE)₃-tag) and two different gallium-68/chelator-complexes on the biodistribution of Z08698 with the aim to improve the tracer for PET imaging. Affibody molecules (HE)₃-Z08698-X and Z08698-X (X = NOTA, NODAGA) were produced and labeled with gallium-68. Binding specificity and cellular processing were studied in HER3-expressing human cancer cell lines BxPC-3 and DU145. Biodistribution was studied 3 h p.i. in Balb/c nu/nu mice bearing BxPC-3 xenografts. Mice were imaged 3 h p.i. using microPET/CT. Conjugates were stably labeled with gallium-68 and bound specifically to HER3 in vitro and in vivo. Association to cells was rapid but internalization was slow. Uptake in tissues, including tumors, was lower for (HE)₃-Z08698-X than for non-tagged variants. The neutral [68Ga]Ga-NODAGA complex reduced the hepatic uptake of Z08698 compared to positively charged [68Ga]Ga-NOTA-conjugated variants. The influence of the chelator was more pronounced in variants without (HE)3-tag. In conclusion, hydrophilic (HE)₃-tag and neutral charge of the [68Ga]Ga-NODAGA complex promoted blood clearance and lowered hepatic uptake of Z08698. [68Ga]Ga-(HE)₃-Z08698-NODAGA was considered most promising, providing the lowest blood and hepatic uptake and the best imaging contrast among the tested variants.

Place, publisher, year, edition, pages
NLM (Medline), 2019
Keywords
affibody, gallium-68, HER3, molecular imaging, NODAGA, NOTA, PET
National Category
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
Identifiers
urn:nbn:se:kth:diva-246490 (URN)10.3390/ijms20051080 (DOI)000462542300079 ()30832342 (PubMedID)2-s2.0-85062394960 (Scopus ID)
Note

QC 20190326

Available from: 2019-03-26 Created: 2019-03-26 Last updated: 2019-04-23Bibliographically approved
Rinne, S. S., Leitao, C. D., Mitran, B., Bass, T., Andersson, K. G., Tolmachev, V., . . . Orlova, A. (2019). Optimization of HER3 expression imaging using affibody molecules: Influence of chelator for labeling with indium-111. Scientific Reports, 9, Article ID 655.
Open this publication in new window or tab >>Optimization of HER3 expression imaging using affibody molecules: Influence of chelator for labeling with indium-111
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 655Article in journal (Refereed) Published
Abstract [en]

Radionuclide molecular imaging of human epidermal growth factor receptor 3 (HER3) expression using affibody molecules could be used for patient stratification for HER3-targeted cancer therapeutics. We hypothesized that the properties of HER3-targeting affibody molecules might be improved through modification of the radiometal-chelator complex. Macrocyclic chelators NOTA (1,4,7-triazacyclononane-N,N',N ''-triacetic acid), NODAGA (1-(1,3-carboxypropyl)-4,7-carboxymethyl-1,4,7-triazacyclononane), DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraaceticacid), and DOTAGA (1,4,7,10-tetraazacyclododececane, 1-(glutaric acid)-4,7,10-triacetic acid) were conjugated to the C-terminus of anti-HER3 affibody molecule Z(08698) and conjugates were labeled with indium-111. All conjugates bound specifically and with picomolar affinity to HER3 in vitro. In mice bearing HER3-expressing xenografts, no significant difference in tumor uptake between the conjugates was observed. Presence of the negatively charged In-111-DOTAGA-complex resulted in the lowest hepatic uptake and the highest tumor-to-liver ratio. In conclusion, the choice of chelator influences the biodistribution of indium-111 labeled anti-HER3 affibody molecules. Hepatic uptake of anti-HER3 affibody molecules could be reduced by the increase of negative charge of the radiometal-chelator complex on the C-terminus without significantly influencing the tumor uptake.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP, 2019
National Category
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
Identifiers
urn:nbn:se:kth:diva-243945 (URN)10.1038/s41598-018-36827-w (DOI)000456554600094 ()30679757 (PubMedID)2-s2.0-85060519832 (Scopus ID)
Note

QC 20190305

Available from: 2019-03-05 Created: 2019-03-05 Last updated: 2019-03-05Bibliographically approved
Orlova, A., Bass, T., Rinne, S. S., Leitao, C. D., Rosestedt, M., Atterby, C., . . . Ståhl, S. (2018). Evaluation of the Therapeutic Potential of a HER3-Binding Affibody Construct TAM-HER3 in Comparison with a Monoclonal Antibody, Seribantumab. Molecular Pharmaceutics, 15(8), 3394-3403
Open this publication in new window or tab >>Evaluation of the Therapeutic Potential of a HER3-Binding Affibody Construct TAM-HER3 in Comparison with a Monoclonal Antibody, Seribantumab
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2018 (English)In: Molecular Pharmaceutics, ISSN 1543-8384, E-ISSN 1543-8392, Vol. 15, no 8, p. 3394-3403Article in journal (Refereed) Published
Abstract [en]

Human epidermal growth factor receptor type 3 (HER3) is recognized to be involved in resistance to HER targeting therapies. A number of HER3-targeting monoclonal antibodies are under clinical investigation as potential cancer therapeutics. Smaller high-affinity scaffold proteins are attractive non-Fc containing alternatives to antibodies. A previous study indicated that anti-HER3 affibody molecules could delay the growth of xenografted HER3-positive tumors. Here, we designed a second-generation HER3-targeting construct (TAM-HER3), containing two HER3-specific affibody molecules bridged by an albumin-binding domain (ABD) for extension of blood circulation. Receptor blocking activity was demonstrated in vitro. In mice bearing BxPC-3 xenografts, the therapeutic efficacy of TAM-HER3 was compared to the HER3-specific monoclonal antibody seribantumab (MM-121). TAM-HER3 inhibited heregulin-induced phosphorylation in a panel of HER3-expressing cancer cells and was found to be equally as potent as seribantumab in terms of therapeutic efficacy in vivo and with a similar safety profile. Median survival times were 60 days for TAM-HER3, 54 days for seribantumab, and 41 days for the control group. No pathological changes were observed in cytopathological examination. The multimeric HER3-binding affibody molecule in fusion to ABD seems promising for further evaluation as candidate therapeutics for treatment of HER3-overexpressing tumors.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2018
Keywords
affibody molecule, HER3, targeting therapy, preclinical
National Category
Clinical Medicine
Identifiers
urn:nbn:se:kth:diva-233605 (URN)10.1021/acs.molpharmaceut.8b00393 (DOI)000441476800049 ()29995421 (PubMedID)2-s2.0-85049877449 (Scopus ID)
Note

QC 20180827

Available from: 2018-08-27 Created: 2018-08-27 Last updated: 2018-09-03Bibliographically approved
Altai, M., Leitao, C. D., Rinne, S. S., Vorobyeva, A., Atterby, C., Ståhl, S., . . . Orlova, A. (2018). Influence of Molecular Design on the Targeting Properties of ABD-Fused Mono- and Bi-Valent Anti-HER3 Affibody Therapeutic Constructs. CELLS, 7(10), Article ID 164.
Open this publication in new window or tab >>Influence of Molecular Design on the Targeting Properties of ABD-Fused Mono- and Bi-Valent Anti-HER3 Affibody Therapeutic Constructs
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2018 (English)In: CELLS, ISSN 2073-4409, Vol. 7, no 10, article id 164Article in journal (Refereed) Published
Abstract [en]

Overexpression of human epidermal growth factor receptor type 3 (HER3) is associated with tumour cell resistance to HER-targeted therapies. Monoclonal antibodies (mAbs) targeting HER3 are currently being investigated for treatment of various types of cancers. Cumulative evidence suggests that affibody molecules may be appropriate alternatives to mAbs. We previously reported a fusion construct (3A3) containing two HER3-targeting affibody molecules flanking an engineered albumin-binding domain (ABD 035) included for the extension of half-life in circulation. The 3A3 fusion protein (19.7 kDa) was shown to delay tumour growth in mice bearing HER3-expressing xenografts and was equipotent to the mAb seribantumab. Here, we have designed and explored a series of novel formats of anti-HER3 affibody molecules fused to the ABD in different orientations. All constructs inhibited heregulin-induced phosphorylation in HER3-expressing BxPC-3 and DU-145 cell lines. Biodistribution studies demonstrated extended the half-life of all ABD-fused constructs, although at different levels. The capacity of our ABD-fused proteins to accumulate in HER3-expressing tumours was demonstrated in nude mice bearing BxPC-3 xenografts. Formats where the ABD was located on the C-terminus of affibody binding domains (3A, 33A, and 3A3) provided the best tumour targeting properties in vivo. Further development of these promising candidates for treatment of HER3-overexpressing tumours is therefore justified.

Place, publisher, year, edition, pages
MDPI, 2018
Keywords
HER3, affibody, molecular design, therapy
National Category
Basic Medicine
Identifiers
urn:nbn:se:kth:diva-239101 (URN)10.3390/cells7100164 (DOI)000448818800022 ()30314301 (PubMedID)
Note

QC 20181121

Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2018-11-21Bibliographically approved
Mitran, B., Güler, R., Roche, F. P., Lindstrom, E., Selvaraju, R. K., Fleetwood, F., . . . Löfblom, J. (2018). Radionuclide imaging of VEGFR2 in glioma vasculature using biparatopic affibody conjugate: proof-of-principle in a murine model. Theranostics, 8(16), 4462-4476
Open this publication in new window or tab >>Radionuclide imaging of VEGFR2 in glioma vasculature using biparatopic affibody conjugate: proof-of-principle in a murine model
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2018 (English)In: Theranostics, ISSN 1838-7640, E-ISSN 1838-7640, Vol. 8, no 16, p. 4462-4476Article in journal (Refereed) Published
Abstract [en]

Vascular endothelial growth factor receptor-2 (VEGFR2) is a key mediator of angiogenesis and therefore a promising therapeutic target in malignancies including glioblastoma multiforme (GBM). Molecular imaging of VEGFR2 expression may enable patient stratification for antiangiogenic therapy. The goal of the current study was to evaluate the capacity of the novel anti-VEGFR2 biparatopic affibody conjugate (Z(VEGFR2)-Bp(2)) for in vivo visualization of VEGFR2 expression in GBM. Methods: Z(VEGFR2)-Bp(2) coupled to a NODAGA chelator was generated and radiolabeled with indium-111. The VEGFR2-expressing murine endothelial cell line MS1 was used to evaluate in vitro binding specificity and affinity, cellular processing and targeting specificity in mice. Further tumor targeting was studied in vivo in GL261 glioblastoma orthotopic tumors. Experimental imaging was performed. Results: [In-111]In-NODAGA-Z(VEGFR2)-Bp(2) bound specifically to VEGFR2 (K-D=33 +/- 18 pM). VEGFR2-mediated accumulation was observed in liver, spleen and lungs. The tumor-to-organ ratios 2 h post injection for mice bearing MS1 tumors were approximately 11 for blood, 15 for muscles and 78 for brain. Intracranial GL261 glioblastoma was visualized using SPECT/CT. The activity uptake in tumors was significantly higher than in normal brain tissue. The tumor-to-cerebellum ratios after injection of 4 mu g [In-111]In-NODAGA-Z(VEGFR2)-Bp(2) were significantly higher than the ratios observed for the 40 mu g injected dose and for the non-VEGFR2 binding size-matched conjugate, demonstrating target specificity. Microautoradiography of cryosectioned CNS tissue was in good agreement with the SPECT/CT images. Conclusion: The anti-VEGFR2 affibody conjugate [In-111]In-NODAGA-Z(VEGFR2)-Bp(2) specifically targeted VEGFR2 in vivo and visualized its expression in a murine GBM orthotopic model. Tumor-to-blood ratios for [In-111]In-NODAGA-Z(VEGFR2)-Bp(2) were higher compared to other VEGFR2 imaging probes. [In-111]In-NODAGA-Z(VEGFR2)-Bp(2) appears to be a promising probe for in vivo noninvasive visualization of tumor angiogenesis in glioblastoma.

Place, publisher, year, edition, pages
Ivyspring International Publisher, 2018
Keywords
VEGFR2, affibody molecule, molecular imaging, SPECT, orthotopic glioma model, in vivo
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:kth:diva-235467 (URN)10.7150/thno.24395 (DOI)000444104300013 ()30214632 (PubMedID)2-s2.0-85052629903 (Scopus ID)
Funder
Science for Life Laboratory - a national resource center for high-throughput molecular bioscienceSwedish Cancer Society, CAN 2017/649 CAN2013/586 CAN 2016/463 CAN2014/474 CAN 2017/425 CAN2015/350 CAN2016/585Swedish Research Council, 621-2012-5236 2015-02509 2015-02353VINNOVA, 2016-04060 2017-02015
Note

QC 20180928

Available from: 2018-09-28 Created: 2018-09-28 Last updated: 2018-09-28Bibliographically approved
Ståhl, S., Gräslund, T., Eriksson Karlström, A., Frejd, F. Y., Nygren, P.-Å. & Löfblom, J. (2017). Affibody Molecules in Biotechnological and Medical Applications. Trends in Biotechnology, 35(8), 691-712
Open this publication in new window or tab >>Affibody Molecules in Biotechnological and Medical Applications
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2017 (English)In: Trends in Biotechnology, ISSN 0167-7799, E-ISSN 1879-3096, Vol. 35, no 8, p. 691-712Article, review/survey (Refereed) Published
Abstract [en]

Affibody molecules are small (6.5-kDa) affinity proteins based on a three-helix bundle domain framework. Since their introduction 20 years ago as an alternative to antibodies for biotechnological applications, the first therapeutic affibody molecules have now entered clinical development and more than 400 studies have been published in which affibody molecules have been developed and used in a variety of contexts. In this review, we focus primarily on efforts over the past 5 years to explore the potential of affibody molecules for medical applications in oncology, neurodegenerative, and inflammation disorders, including molecular imaging, receptor signal blocking, and delivery of toxic payloads. In addition, we describe recent examples of biotechnological applications, in which affibody molecules have been exploited as modular affinity fusion partners.

Place, publisher, year, edition, pages
Elsevier, 2017
National Category
Biological Sciences
Identifiers
urn:nbn:se:kth:diva-211597 (URN)10.1016/j.tibtech.2017.04.007 (DOI)000405847200005 ()
Note

QC 20170815

Available from: 2017-08-15 Created: 2017-08-15 Last updated: 2017-08-15Bibliographically approved
Rosestedt, M., Andersson, K. G., Mitran, B., Rinne, S. S., Tolmachev, V., Löfblom, J., . . . Ståhl, S. (2017). Evaluation of a radiocobalt-labelled affibody molecule for imaging of human epidermal growth factor receptor 3 expression. International Journal of Oncology, 51(6), 1765-1774
Open this publication in new window or tab >>Evaluation of a radiocobalt-labelled affibody molecule for imaging of human epidermal growth factor receptor 3 expression
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2017 (English)In: International Journal of Oncology, ISSN 1019-6439, Vol. 51, no 6, p. 1765-1774Article in journal (Refereed) Published
Abstract [en]

The human epidermal growth factor receptor 3 (HER3) is involved in the development of cancer resistance towards tyrosine kinase-Targeted therapies. Several HER3-Targeting therapeutics are currently under clinical evaluation. Non-invasive imaging of HER3 expression could improve patient management. Affibody molecules are small engineered scaffold proteins demonstrating superior properties as targeting probes for molecular imaging compared with monoclonal antibodies. Feasibility of in vivo HER3 imaging using affibody molecules has been previously demonstrated. Preclinical studies have shown that the contrast when imaging using anti-HER3 affibody molecules can be improved over time. We aim to develop an agent for PET imaging of HER3 expression using the long-lived positron-emitting radionuclide cobalt-55 (55Co) (T1/2=17.5 h). A long-lived cobalt isotope 57Co was used as a surrogate for 55Co in this study. The anti-HER3 affibody molecule HEHEHE-ZHER3-NOTA was labelled with radiocobalt with high yield, purity and stability. Biodistribution of 57Co-HEHEHE-ZHER3-NOTA was measured in mice bearing DU145 (prostate carcinoma) and LS174T (colorectal carcinoma) xenografts at 3 and 24 h post injection (p.i.). Tumour-To-blood ratios significantly increased between 3 and 24 h p.i. (p<0.05). At 24 h p.i., tumour-To-blood ratios were 6 for DU145 and 8 for LS174T xenografts, respectively. HER3-expressing xenografts were clearly visualized in a preclinical imaging setting already 3 h p.i., and contrast further improved at 24 h p.i. In conclusion, the radiocobalt-labelled anti-HER3 affibody molecule, HEHEHE-ZHER3-NOTA, is a promising tracer for imaging of HER3 expression in tumours.

Place, publisher, year, edition, pages
Spandidos Publications, 2017
Keywords
A ffibody, Cobalt-55/57, H ER3, NOTAchelator, PET i maging
National Category
Cancer and Oncology
Identifiers
urn:nbn:se:kth:diva-218113 (URN)10.3892/ijo.2017.4152 (DOI)2-s2.0-85033500587 (Scopus ID)
Note

QC 20171127

Available from: 2017-11-27 Created: 2017-11-27 Last updated: 2017-12-18Bibliographically approved
Lindberg, H., Sandersjöö, L., Meister, S. W., Uhlén, M., Löfblom, J. & Ståhl, S. (2017). Flow-cytometric screening of aggregation-inhibitors using a fluorescence-assisted intracellular method. Biotechnology Journal, 12(1), Article ID 1600364.
Open this publication in new window or tab >>Flow-cytometric screening of aggregation-inhibitors using a fluorescence-assisted intracellular method
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2017 (English)In: Biotechnology Journal, ISSN 1860-6768, E-ISSN 1860-7314, Vol. 12, no 1, article id 1600364Article in journal (Refereed) Published
Abstract [en]

Aggregation of misfolded peptides and proteins is a key event in several neurodegenerative diseases. Suggested treatments of such disorders aim to inhibit the initial aggregation process. Here, we have developed an intracellular, function-based screening method, intended for isolation of aggregation-inhibitors from combinatorial protein libraries by flow-cytometric cell sorting. The method is based on fusion of aggregation-prone peptides to a fluorescent protein, functioning as a solubility reporter. Co-expression of a protein-based aggregation-inhibitor should prevent aggregation and thus increase the whole-cell fluorescence. We evaluated the method using the aggregation-prone Alzheimer's-related amyloid-β (Aβ) peptide in fusion to green-fluorescent protein (GFP), and an Aβ aggregation-inhibiting Affibody molecule. To adapt the method for library applications, the inhibitor was linked to an mCherry reporter for normalization of protein expression levels. We found that aggregation propensity correlates with fluorescence intensity, as co-expression of the Affibody-inhibitor increased the whole-cell fluorescence relative to a non-inhibitor. Employing improved cultivation parameters, we furthermore demonstrated efficient rescue from aggregation of an α-synuclein-derived protein using a different type of aggregation-inhibitor. Importantly, we also showed that the Aβ aggregation-inhibiting Affibody molecule could be isolated from a 1:10,000 background of non-inhibitors, with around 3,500-fold enrichment, in one cycle of fluorescence-based cell sorting. In conclusion, our new method represents a promising approach for generation of novel protein-based aggregation-inhibitors.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017
Keywords
Affibody molecules, Aggregation-inhibitor, Amyloid beta, Combinatorial protein engineering, Intracellular selection system, Cells, Cytology, Diagnosis, Fluorescence, Glycoproteins, Molecules, Neurodegenerative diseases, Peptides, Aggregation inhibitors, Amyloid betas, Protein engineering, Selection systems, Proteins, alpha synuclein, amyloid beta protein, green fluorescent protein, recombinant protein, chemistry, Escherichia coli, flow cytometry, gene vector, genetics, metabolism, preclinical study, procedures, alpha-Synuclein, Amyloid beta-Peptides, Drug Evaluation, Preclinical, Genetic Vectors, Green Fluorescent Proteins, Recombinant Proteins
National Category
Biological Sciences
Identifiers
urn:nbn:se:kth:diva-202248 (URN)10.1002/biot.201600364 (DOI)000395638400009 ()2-s2.0-85006293410 (Scopus ID)
Note

Funding text: We thank Affibody AB for providing the genetic construct of ZHER2-mCherry. The Wallenberg Center for Protein Research and the Swedish Brain Foundation (grant FO2015-0174) are acknowledged for funding. Conceived and designed the experiments: HL LS JL SS. Performed the experiments: HL LS SM. Contributed reagents/materials/analysis tools and analyzed the data: HL LS SM MU JL SS. Wrote the paper: HL LS JL SS. The authors declare no conflicts of interest. QC 20170313

Available from: 2017-03-13 Created: 2017-03-13 Last updated: 2017-11-29Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-9282-0174

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