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Updated: Jan 22, 2026
09:35
A High-content In Vitro Pancreatic Islet β-cell Replication Discovery Platform
Published on: July 16, 2016
11.6K
β-Galactoside-mediated tissue organization during islet reconstitution.
Sae Kamitori1, Yasuhiro Ozeki1, Nobuhiko Kojima1
1Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.
Regenerative Therapy
|June 28, 2019
Summary
A specific sugar chain, beta-galactoside, is key for pancreatic cells to self-organize into islet-like structures. This finding helps understand how pancreatic cell aggregates form in vitro.
Area of Science:
- Cell Biology
- Biochemistry
- Developmental Biology
Background:
- Murine pancreatic alpha (αTC1.6) and beta (MIN6-m9) cell lines form islet-like structures in vitro.
- These structures exhibit enhanced insulin secretion.
- The underlying mechanisms of this self-organization are not fully understood.
Purpose of the Study:
- To investigate the role of cell surface sugar chains in the self-organization of pancreatic alpha and beta cells.
- To identify specific molecular interactions mediating cell recognition during islet-like structure formation.
Main Methods:
- Lectin-binding assays were used to identify cell surface carbohydrate structures.
- Erythrina cristagalli agglutinin (ECA) was employed to probe for specific sugar moieties.
- Experiments involved blocking cell surface interactions and using sugar inhibitors (lactose) to assess functional roles.
Main Results:
- Erythrina cristagalli agglutinin (ECA) specifically binds to beta-galactoside structures on MIN6-m9 (beta) cells.
- Binding of ECA to MIN6-m9 cells inhibited the self-organization of αTC1.6 and MIN6-m9 heteroaggregates.
- Lactose, a disaccharide containing beta-galactoside, neutralized the inhibitory effect of ECA, confirming the role of beta-galactoside.
Conclusions:
- Beta-galactoside sugar chains on pancreatic beta cells are crucial for the mutual recognition and self-organization into islet-like architectures in vitro.
- This study elucidates a key molecular mechanism driving pancreatic cell aggregate formation and potential therapeutic strategies.
Keywords:
ConA, concanavalin ADMEM, Dulbecco's Modified Eagle's MediumECA, Erythrina cristagalli agglutininFITC, fluorescein isothiocyanateIslet reconstitutionIslet-like structureLCA, Lens culinaris agglutinin, α-d-mannosyl groupLectinMAA, Maackia amurensis agglutininMC, methylcelluloseRCA, Ricinus communis agglutininSSA, Sambucus sieboldiana agglutininSugar chainUEA, Ulex europaeus agglutininWGA, wheat germ agglutininβ-Galactoside
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