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Sjölander, Daniel
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Nordeman, P., Johansson, L. B. G., Bäck, M., Estrada, S., Hall, H., Sjölander, D., . . . Antoni, G. (2016). 11C and 18FRadiolabeling of Tetra- and Pentathiophenes as PET-ligands for Amyloid Protein Aggregates. ACS Medicinal Chemistry Letters, 7(4), 368-373
Öppna denna publikation i ny flik eller fönster >>11C and 18FRadiolabeling of Tetra- and Pentathiophenes as PET-ligands for Amyloid Protein Aggregates
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2016 (Engelska)Ingår i: ACS Medicinal Chemistry Letters, ISSN 1948-5875, E-ISSN 1948-5875, Vol. 7, nr 4, s. 368-373Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Three oligothiophenes were evaluated as PET tracers for the study of local and systemic amyloidosis ex vivo using tissue from patients with amyloid deposits and in vivo using healthy animals and PET-CT. The ex vivo binding studies revealed that all three labeled compounds bound specifically to human amyloid deposits. Specific binding was found in the heart, kidney, liver and spleen. To verify the specificity of the oligothiophenes towards amyloid deposits, tissue sections with amyloid pathology were stained using the fluorescence exhibited by the compounds and evaluated with multiphoton microscopy. Furthermore, in vivo rat and monkey PET-CT studies showed very low uptake in the brain, pancreas and heart of the healthy animals indicating low non-specific binding to healthy tissue. The biological evaluations indicated that this is a promising group of compounds for the visualization of systemic and localized amyloidosis.

Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2016
Nationell ämneskategori
Kemi Cellbiologi
Identifikatorer
urn:nbn:se:liu:diva-122273 (URN)10.1021/acsmedchemlett.5b00309 (DOI)000374436700007 ()
Anmärkning

Funding agencies:  Swedish Research Council; Swedish Foundation for Strategic Research; LiU-Neuro; Ehrling-Persson Foundation; Goran-Gustafsson Foundation; ERC Starting Independent Researcher grant (Project: MUMID)

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Tillgänglig från: 2015-10-27 Skapad: 2015-10-27 Senast uppdaterad: 2018-04-25Bibliografiskt granskad
Sjölander, D., Roecken, C., Westermark, P., Westermark, G. T., Nilsson, P. & Hammarström, P. (2016). Establishing the fluorescent amyloid ligand h-FTAA for studying human tissues with systemic and localized amyloid. Amyloid: Journal of Protein Folding Disorders, 23(2), 98-108
Öppna denna publikation i ny flik eller fönster >>Establishing the fluorescent amyloid ligand h-FTAA for studying human tissues with systemic and localized amyloid
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2016 (Engelska)Ingår i: Amyloid: Journal of Protein Folding Disorders, ISSN 1350-6129, E-ISSN 1744-2818, Vol. 23, nr 2, s. 98-108Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Rapid and accurate detection of amyloid deposits in routine surgical pathology settings are of great importance. The use of fluorescence microscopy in combination with appropriate amyloid specific dyes is very promising in this regard. Here we report that a luminescent conjugated oligothiophene, h-FTAA, rapidly and with high sensitivity and selectivity detects amyloid deposits in verified clinical samples from systemic amyloidosis patients with AA, AL and ATTR types; as well as in tissues laden with localized amyloidosis of AANF, AIAPP and ASem1 type. The probe h-FTAA emitted yellow red fluorescence on binding to amyloid deposits, whereas no apparent staining was observed in surrounding tissue. The only functional structure stained with h-FTAA showing the amyloidotypic fluorescence spectrum was Paneth cell granules in intestine. Screening of 114 amyloid containing tissues derived from 107 verified (Congo red birefringence and/or immunohistochemistry) amyloidosis patients revealed complete correlation between h-FTAA and Congo red fluorescence (107/107, 100% sensitivity). The majority of Congo red negative control cases (27 of 32, 85% specificity) were negative with h-FTAA. Small Congo red negative aggregates in kidney, liver, pancreas and duodenum were found by h-FTAA fluorescence in five control patients aged 72-83 years suffering from diverse diseases. The clinical significance of these false-positive lesions is currently not known. Because h-FTAA fluorescence is one magnitude brighter than Congo red and as the staining is performed four magnitudes lower than the concentration of dye, we believe that these inclusions are beyond detection by Congo red. We conclude that h-FTAA is a fluorescent hypersensitive, rapid and powerful tool for identifying amyloid deposits in tissue sections. Use of h-FTAA can be exploited as a rapid complementary technique for accurate detection of amyloid in routine surgical pathology settings. Our results also implicate the potential of the technique for detection of prodromal amyloidosis as well as for discovery of new amyloid-like protein aggregates in humans.

Ort, förlag, år, upplaga, sidor
TAYLOR & FRANCIS LTD, 2016
Nyckelord
Amyloidosis; Congo red; diagnosis; fluorescence; microscopy; oligothiophenes; screening
Nationell ämneskategori
Kemi
Identifikatorer
urn:nbn:se:liu:diva-128924 (URN)10.3109/13506129.2016.1158159 (DOI)000375905000004 ()26987044 (PubMedID)
Anmärkning

Funding Agencies|Swedish Foundation for Strategic Research; Swedish Research Council; Goran Gustafsson Foundation; Linkoping University Center of Neuroscience; European Research Council (ERC starting grant; Project MUMID); EU-FP7 Health programme project LUPAS; Selanders Foundation; patients association FAM; patients association FAMY Norrbotten; patients association Amyl

Tillgänglig från: 2016-06-09 Skapad: 2016-06-07 Senast uppdaterad: 2018-09-26
Wickham, A., Sjölander, D., Bergström, G., Wang, E., Rajendran, V., Hildesjö, C., . . . Aili, D. (2015). Near-Infrared Emitting and Pro-Angiogenic Electrospun Conjugated Polymer Scaffold for Optical Biomaterial Tracking. Advanced Functional Materials, 25(27), 4274-4281
Öppna denna publikation i ny flik eller fönster >>Near-Infrared Emitting and Pro-Angiogenic Electrospun Conjugated Polymer Scaffold for Optical Biomaterial Tracking
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2015 (Engelska)Ingår i: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 25, nr 27, s. 4274-4281Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Noninvasive tracking of biomaterials is vital for determining the fate and degradation of an implant in vivo, and to show its role in tissue regeneration. Current biomaterials have no inherent capacity to enable tracing but require labeling with, for example, fluorescent dyes, or nanoparticles. Here a novel biocompatible fully conjugated electrospun scaffold is described, based on a semiconducting luminescent polymer that can be visualized in situ after implantation using fluorescence imaging. The polymer, poly [2,3-bis-(3-octyloxyphenyl)quinoxaline-5,8-diyl-alt -thiophene-2,5-diyl] (TQ1), is electrospun to form a fibrous mat. The fibers display fluorescence emission in the near-infrared region with lifetimes in the sub-nanosecond range, optimal for in situ imaging. The material shows no cytotoxic behaviors for embryonic chicken cardiomyocytes and mouse myoblasts, and cells migrate onto the TQ1 fibers even in the presence of a collagen substrate. Subcutaneous implantations of the material in rats show incorporation of the TQ1 fibers within the tissue, with limited inflammation and a preponderance of small capillaries around the fibers. The fluorescent properties of the TQ1 fibers are fully retained for up to 90 d following implantation and they can be clearly visualized in tissue using fluorescence and lifetime imaging, thus making it both a pro-angiogenic and traceable biomaterial.

Ort, förlag, år, upplaga, sidor
Wiley: 12 months, 2015
Nyckelord
biomaterials, conjugated polymers, near-infrared, angiogenesis, electrospinning
Nationell ämneskategori
Biomaterialvetenskap Polymerkemi
Identifikatorer
urn:nbn:se:liu:diva-120449 (URN)10.1002/adfm.201500351 (DOI)000357996600011 ()
Anmärkning

Funding Agencies|Linkoping University; Swedish Foundation for Strategic Research; Swedish Research Council

Tillgänglig från: 2015-08-12 Skapad: 2015-08-11 Senast uppdaterad: 2017-12-04
Sjölander, D., Bijzet, J., Hazenberg, B. P., Nilsson, P. & Hammarström, P. (2015). Sensitive and rapid assessment of amyloid by oligothiophene fluorescence in subcutaneous fat tissue. Amyloid: Journal of Protein Folding Disorders, 22(1), 19-25
Öppna denna publikation i ny flik eller fönster >>Sensitive and rapid assessment of amyloid by oligothiophene fluorescence in subcutaneous fat tissue
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2015 (Engelska)Ingår i: Amyloid: Journal of Protein Folding Disorders, ISSN 1350-6129, E-ISSN 1744-2818, Vol. 22, nr 1, s. 19-25Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Systemic amyloidosis (SA) is often diagnosed late. Combining clinical and biochemical biomarkers is necessary for raising suspicion of disease. Fine needle aspiration (FNA) of subcutaneous fat enables SA detection by Congo red staining. The luminescent conjugated probe heptameric formic thiophene acetic acid (h-FTAA) is a sensitive alternative to Congo red-staining of tissue samples. Our objective was to compare h-FTAA fluorescence with the Congo red stain for amyloid detection in FNA-obtained fat tissue. Herein, we studied samples from 57 patients with established SA (19 with AA, 20 with AL, and 18 with ATTR) and 17 age-matched controls (34–75 years). Positivity for h-FTAA was graded according to a Congo red-based grading scale ranging from 0 to 4+. Amyloid grading by both methods correlated strongly (r = 0.87). Here h-FTAA was positive in 53 of 54 Congo red-positive cases (sensitivity 98%) and h-FTAA was negative in 7 of 17 Congo red-negative controls (specificity 41%), but was also positive for 3 Congo red-negative SA cases. We conclude that h-FTAA fluorescence is more sensitive than Congo red staining in this small exploratory study of fat tissue samples, implicating potential sensitivity for prodromal amyloidosis, but is less specific for clinical amyloidosis defined by Congo red positivity. Given its simplicity h-FTAA staining may therefore be the most appropriate method for rapid screening of fat tissue samples but should presently treat grade 1+ as only suggestive, whereas 2+ or higher as positive for amyloidosis. Parallel assessment of h-FTAA and Congo red staining appears highly promising for clinical applications.

Ort, förlag, år, upplaga, sidor
Informa Healthcare, 2015
Nyckelord
AA amyloidosis, amyloid light chain, hyper spectral imaging, systemic amyloidosis, transthyretin
Nationell ämneskategori
Kemi
Identifikatorer
urn:nbn:se:liu:diva-117806 (URN)10.3109/13506129.2014.984063 (DOI)000352637800003 ()25847117 (PubMedID)
Anmärkning

At the time for thesis presentation publication was in status: Manuscript

Funding Agencies|European Commission; Swedish Foundation for Strategic Research; Swedish Research Council; Linkoping University Center for Neuroscience; European Research Council

Tillgänglig från: 2015-05-11 Skapad: 2015-05-08 Senast uppdaterad: 2018-04-25Bibliografiskt granskad
Sjölander, D., Röcken, C., Westermark, P., Westermark, G. T., Nilsson, P. & Hammarström, P. (2014). Evaluation of the fluorescent amyloid ligand h-FTAA in human tissues with systemic and localized amyloid.
Öppna denna publikation i ny flik eller fönster >>Evaluation of the fluorescent amyloid ligand h-FTAA in human tissues with systemic and localized amyloid
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2014 (Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Abstract [en]

Rapid and accurate detection of amyloid deposits in routine surgical pathology settings are of great importance. The use of fluorescence microscopy in combination with appropriate amyloid specific dyes is very promising in this regard. Most systemic amyloidosis are progressive and lethal. Disease specific therapy depends on the identification of the offending proteins. Here we report that a luminescent conjugated oligothiophene, h-FTAA, rapidly and with high sensitivity and selectivity detects amyloid deposits in verified clinical samples from systemic amyloidosis patients with AA, AL, and ATTR types; as well as in tissues laden with localized amyloidosis of AANF, AIAPP and ASem1 type. The probe h-FTAA emitted yellow red fluorescence on binding to amyloid deposits, whereas no apparent staining was observed in surrounding tissue. Screening of 114 amyloid containing tissues derived from §07 verified (Congo red birefringence and immunohistochemistry) amyloidosis patients revealed complete correlation between h-FTAA and Congo red fluorescence. We conclude that h-FTAA is a fluorescent hypersensitive, rapid and powerful tool for identifying amyloid deposits in tissue sections. H-FTAA staining can be utilized as a rapid complementary technique for accurate detection of amyloid in routine surgical pathology settings. It was also revealed that within 5 of 15 age matched Congo red negative control samples h-FTAA detects microdeposits of amyloid-like protein aggregates in liver and kidney. The results emphasize the potential of the dye for detection of prodromal amyloidosis as well as for discovery of novel amyloid-like protein aggregates in humans.

Nationell ämneskategori
Kemi Naturvetenskap
Identifikatorer
urn:nbn:se:liu:diva-106790 (URN)
Tillgänglig från: 2014-05-23 Skapad: 2014-05-23 Senast uppdaterad: 2018-04-25Bibliografiskt granskad
Sjölander, D. (2014). Luminescent molecular recognition of pathognomonic and aging associated protein aggregates. (Doctoral dissertation). Linköping: Linköping University Electronic Press
Öppna denna publikation i ny flik eller fönster >>Luminescent molecular recognition of pathognomonic and aging associated protein aggregates
2014 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Various protein inclusions have been recognized to be associated with aging and pathogenic conditions, such as in Alzheimer’s disease, Parkinson’s disease, Type 2 diabetes, and the prionoses Creutzfeldt-Jakob disease, Chronic wasting disease (CWD), and Mad cow disease. The causative transition of protein aggregation is the alteration in the conformation of the protein that renders the protein susceptible towards self-assembly. Variations in the physico-chemical ultrastructure of the protein deposit, i.e. the conformation and the chemical nature of the fibril constituent protein monomers, translate into specific structure-property phenotype, hence clinicopathology. Upon transmission and/or propagation this phenomenon gives rise to specific protein aggregate strains. Today most potential treatments of the protein conformational diseases have been a huge failure, effectively due to late diagnosis and subsequent therapeutic intervention. An imperative for efficient treatment is early detection and accurate identification for proper clinical diagnosis.

The purpose of the studies in this thesis was to develop highly sensitive methods for detection and discrimination of age- and disease associated protein deposits both for in vitro and ex vivo utilization.

Herein we have shown that, for in vitro usage, Nile red will bind to amyloid-like protein aggregates derived from a plethora of precursor proteins. It was also found that the fluorescence was insensitive to acidic assay conditions in contrast to the standard in vitro dye Thioflavin T (ThT). Further, Nile red was shown to discriminate between conformational isoforms thus enabling conformational typing of amyloid structures.

For the development of ex vivo detection methods we employed luminescent conjugated oligothiophenes (LCOs) and utilized the structure-conformation induced optical properties of this class of protein aggregate ligands. The heptameric oligothiophene h-FTAA was successfully used to detect, with high sensitivity, protein deposits from various systemic amyloidoses (ATTR, AA, AL-λ/κ, and the local amyloidosis AIAPP) derived from biopsy specimens. Also aging-associated protein deposits were detected which was found promising for early detection of potentially pathogenic protein inclusions. Further, LCO staining of tissue sections was found compatible with immunolabeling enabling subtyping of involved proteins. Early detection of amyloidosis also requires relatively non-invasive methods, why h-FTAA staining was directed towards fine-needle-aspirated (FNA) abdominal fat tissue smears. Staining of protein deposits and detection with high sensitivity was also found in the fat tissue smears.

In addition to the relatively rare prionoses it has lately been shown that Alzheimer’s, Parkinson’s diseases share similar properties as the prion pathologies. Hence the urgent need for ligands that will recognize specific disease specific strain aggregates. Using an established murine model for prion strain propagation we were able to discriminate two different prion strains, murine adapted Sheep Scrapie (mSS) and murine adapted Chronic wasting disease (mCWD) from each other by using multimodal fluorescence microscopy entailing emission/excitation spectral imaging and fluorescent lifetime imaging (FLIM).

In conclusion we have shown that the LCOs will recognize protein aggregates with high sensitivity and selectivity. In addition we have shown that the LCOs detect protein aggregates that Congo red failed to recognize thus allowing potentially early diagnosis. Last, we show that the LCOs will recognize and discriminate between different protein aggregate strains which potentially will allow disease specific therapeutic targeting.

Ort, förlag, år, upplaga, sidor
Linköping: Linköping University Electronic Press, 2014. s. 77
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1596
Nationell ämneskategori
Kemi Naturvetenskap
Identifikatorer
urn:nbn:se:liu:diva-106878 (URN)978-91-7519-334-2 (ISBN)
Disputation
2014-06-11, Planck, Fysikhuset, Campus Valla, Linköpings universitet, Linköping, 14:15 (Svenska)
Opponent
Handledare
Tillgänglig från: 2014-05-23 Skapad: 2014-05-23 Senast uppdaterad: 2018-04-25Bibliografiskt granskad
Magnusson, K., Simon, R., Sjölander, D., Sigurdson, C. J., Hammarström, P. & Nilsson, P. R. (2014). Multimodal fluorescene microscopy of prion strain specific PrP deposits stained by thiophene-bassed amyloid ligands. Prion, 8(4), 319-329
Öppna denna publikation i ny flik eller fönster >>Multimodal fluorescene microscopy of prion strain specific PrP deposits stained by thiophene-bassed amyloid ligands
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2014 (Engelska)Ingår i: Prion, ISSN 1933-6896, E-ISSN 1933-690X, Vol. 8, nr 4, s. 319-329Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The disease-associated prion protein (PrP) forms aggregates which vary in structural conformation yet share identical primary sequence. These variations in PrP conformation are believed to manifest in prion strains exhibiting distinctly different periods of disease incubation as well as regionally specific aggregate deposition within the brain. The anionic luminescent conjugated polythiophene (LCP), polythiophene acetic acid (PTAA) has previously been used to distinguish PrP deposits associated with distinct mouse adapted strains via distinct fluorescence emission profiles from the dye. Here we employed PTAA and 3 structurally related chemically defined luminescent conjugated oligothiophenes (LCOs) to stain brain tissue sections from mice inoculated with 2 distinct prion strains. Our results showed that in addition to emission spectra, excitation, and fluorescence lifetime imaging microscopy (FLIM) can fruitfully be assessed for optical distinction of PrP deposits associated with distinct prion strains. Our findings support the theory that alterations in LCP/LCO fluorescence are due to distinct conformational restriction of the thiophene backbone upon interaction with PrP aggregates associated with distinct prion strains. We foresee that LCP and LCO staining in combination with multimodal fluorescence microscopy might aid in detecting structural differences among discrete protein aggregates and in linking protein conformational features with disease phenotypes for a variety of neurodegenerative proteinopathies.

Ort, förlag, år, upplaga, sidor
Taylor & Francis, 2014
Nationell ämneskategori
Kemi Naturvetenskap
Identifikatorer
urn:nbn:se:liu:diva-106792 (URN)10.4161/pri.29239 (DOI)000348376000006 ()
Tillgänglig från: 2014-05-23 Skapad: 2014-05-23 Senast uppdaterad: 2018-04-25Bibliografiskt granskad
Babu Moparthi, S., Sjölander, D., Villebeck, L., Jonsson, B.-H., Hammarström, P. & Carlsson, U. (2014). Transient conformational remodeling of folding proteins by GroES - Individually and in concert with GroEL. Journal of chemical biology, 7(1), 1-15
Öppna denna publikation i ny flik eller fönster >>Transient conformational remodeling of folding proteins by GroES - Individually and in concert with GroEL
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2014 (Engelska)Ingår i: Journal of chemical biology, ISSN 1864-6158, E-ISSN 1864-6166, Vol. 7, nr 1, s. 1-15Artikel, forskningsöversikt (Refereegranskat) Published
Abstract [en]

The commonly accepted dogma of the bacterial GroE chaperonin system entails protein folding mediated by cycles of several ATP-dependent sequential steps where GroEL interacts with the folding client protein. In contrast, we herein report GroES-mediated dynamic remodeling (expansion and compression) of two different protein substrates during folding: the endogenous substrate MreB and carbonic anhydrase (HCAII), a well-characterized protein folding model. GroES was also found to influence GroEL binding induced unfolding and compression of the client protein underlining the synergistic activity of both chaperonins, even in the absence of ATP. This previously unidentified activity by GroES should have important implications for understanding the chaperonin mechanism and cellular stress response. Our findings necessitate a revision of the GroEL/ES mechanism.

Ort, förlag, år, upplaga, sidor
Springer Berlin/Heidelberg, 2014
Nyckelord
Carbonic anhydrase; Chaperone; FRET; Molten globule; MreB; Protein folding
Nationell ämneskategori
Kemi Biologiska vetenskaper
Identifikatorer
urn:nbn:se:liu:diva-110534 (URN)10.1007/s12154-013-0106-5 (DOI)24386013 (PubMedID)2-s2.0-84891782616 (Scopus ID)
Tillgänglig från: 2014-09-14 Skapad: 2014-09-12 Senast uppdaterad: 2018-04-25
Arja, K., Sjölander, D., Åslund, A., Prokop, S., Heppner, F. L., Konradsson, P., . . . Nilsson, P. (2013). Enhanced Fluorescent Assignment of Protein Aggregates by an Oligothiophene-Porphyrin-Based Amyloid Ligand. Macromolecular rapid communications, 34(9), 723-730
Öppna denna publikation i ny flik eller fönster >>Enhanced Fluorescent Assignment of Protein Aggregates by an Oligothiophene-Porphyrin-Based Amyloid Ligand
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2013 (Engelska)Ingår i: Macromolecular rapid communications, ISSN 1022-1336, E-ISSN 1521-3927, Vol. 34, nr 9, s. 723-730Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Fluorescent probes identifying protein aggregates are of great interest, as deposition of aggregated proteins is associated with many devastating diseases. Here, we report that a fluorescent amyloid ligand composed of two distinct molecular moieties, an amyloidophilic pentameric oligothiophene and a porphyrin, can be utilized for spectral and lifetime imaging assessment of recombinant A 1-42 amyloid fibrils and A deposits in brain tissue sections from a transgenic mouse model with Alzheimers disease pathology. The enhanced spectral range and distinct lifetime diversity of this novel oligothiopheneporphyrin-based ligand allow a more precise assessment of heterogeneous amyloid morphology compared with the corresponding oligothiophene dye.

Ort, förlag, år, upplaga, sidor
Wiley-VCH Verlag, 2013
Nyckelord
oligothiophene, porphyrin, protein deposits, imaging, fluorescence
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
urn:nbn:se:liu:diva-93385 (URN)10.1002/marc.201200817 (DOI)000318354500004 ()
Anmärkning

Funding Agencies|Swedish Research Council||Knut and Alice Wallenberg Foundation||Swedish Foundation for Strategic Research||European Union FP7 HEALTH (Project LUPAS)||LiU Neuroscience Center||ERC Starting Independent Researcher grant (Project: MUMID)||

Tillgänglig från: 2013-05-31 Skapad: 2013-05-31 Senast uppdaterad: 2018-08-24
Sjölander, D., Mason, J., Westermark, G. T., Westermark, P., Hammarström, P. & Nilsson, P. (2013). Luminescent conjugated oligothiophenes: A novel dye for amyloid diagnostics. In: Bouke P.C. Hazenberg and Johan Bijzet (Ed.), XIIIth International Symposium on Amyloidosis: From Misfolded Proteins to Well-Designed Treatment: The Proceedings of the XIIIth International Symposium on Amyloidosis,May 6-10, 2012, Groningen, The Netherlands. Paper presented at The XIIIth International Symposium on Amyloidosis, May 6-10, 2012, Groningen, The Netherlands (pp. 179-182). GUARD (Groningen Unit for Amyloidosis Research & Development)
Öppna denna publikation i ny flik eller fönster >>Luminescent conjugated oligothiophenes: A novel dye for amyloid diagnostics
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2013 (Engelska)Ingår i: XIIIth International Symposium on Amyloidosis: From Misfolded Proteins to Well-Designed Treatment: The Proceedings of the XIIIth International Symposium on Amyloidosis,May 6-10, 2012, Groningen, The Netherlands / [ed] Bouke P.C. Hazenberg and Johan Bijzet, GUARD (Groningen Unit for Amyloidosis Research & Development) , 2013, s. 179-182Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The alkaline Congo red staining method has, for almost half a century, been the gold standard of amyloid diagnosis. Unfortunately, the method is both laborious and requires great skill to achieve proper diagnosis. In this study we are presenting an alternative method that is compatible with immunofluorescence typing. We used a novel dye, h-FTAA, designed and synthesized by us. The dye belongs to the novel class of conformation sensitive dyes known as Luminescent conjugated oligothiophenes (LCOs). We examined 37 different cases of systemic amyloidoses from various tissues. It was found that h-FTAA binds to amyloid with higher sensitivity and greater selectivity than Congo red, as was determined by both fluorescence- and light polarization microscopy. Due to the methods ease of use and performance compared to Congo red, it is concluded that h-FTAA is a better first choice for screening of systemic amyloidoses.

Ort, förlag, år, upplaga, sidor
GUARD (Groningen Unit for Amyloidosis Research & Development), 2013
Nationell ämneskategori
Kemi Naturvetenskap
Identifikatorer
urn:nbn:se:liu:diva-106789 (URN)978-90-821593-0-1 (ISBN)978-90-821593-1-8 (ISBN)
Konferens
The XIIIth International Symposium on Amyloidosis, May 6-10, 2012, Groningen, The Netherlands
Tillgänglig från: 2014-05-23 Skapad: 2014-05-23 Senast uppdaterad: 2018-04-25Bibliografiskt granskad
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