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Cited by 178

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Transforming growth factor-beta 1, -beta 2, and -beta 3 secreted by a human glioblastoma cell line. Identification of small and different forms of large latent complexes.

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Olofsson, A, Miyazono, K, Kanzaki, T, Colosetti, P, Engström, U, Heldin, C.H.·1992·Journal of Biological Chemistry

Abstract

Transforming growth factor-beta 1 (TGF-beta 1) has been found to occur as latent high molecular weight complexes, with or without an associated component denoted latent TGF-beta 1-binding protein (LTBP). We show here that a human glioblastoma cell line (U-1240 MG) secretes all isoforms of TGF-beta s found in mammalian cells (TGF-beta 1, -beta 2, and -beta 3). Approximately 26% of the secreted TGF-beta is in an active form. Latent TGF-beta s were partially purified from medium conditioned by the U-1240 MG cell line using anion exchange chromatography. Analysis of the different fractions by immunoblotting using antisera against precursor parts of the different TGF-beta isoforms, and against LTBP, revealed that not only TGF-beta 1 but also other isoforms of TGF-beta may occur in high molecular weight forms containing LTBP. In addition, each one of the TGF-beta isoforms occurred in smaller forms not containing LTBP. Interestingly, each of the TGF-beta isoforms was also seen in complexes of about 210 kDa containing associated component(s) distinct from LTBP. These results indicate that each of the different isoforms of TGF-beta is synthesized and secreted by this glioblastoma cell line in several different high molecular weight latent forms; the biological importance of the various latent TGF-beta complexes is discussed.

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Metadata

Authors
Olofsson, A., Miyazono, K., Kanzaki, T., Colosetti, P., Engström, U., & Heldin, C. H.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1992-09
Volume
267
Issue
27
Pages
19482-19488
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1583136467
Cited by
178
References
1
FWCI
5.60
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Transforming growth factor-beta 1, -beta 2, and -beta 3 secreted by a human glioblastoma cell line. Identification of small and different forms of large latent complexes. https://app.cochat.ai/papers/10.1016/s0021-9258(18)41801-7
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Olofsson, A., Miyazono, K., Kanzaki, T., Colosetti, P., Engström, U., & Heldin, C. H. (1992). Transforming growth factor-beta 1, -beta 2, and -beta 3 secreted by a human glioblastoma cell line. Identification of small and different forms of large latent complexes. Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(18)41801-7

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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