What question did this study set out to answer?

To clone and characterize PDX-1 and preproinsulin in zebrafish to determine whether zebrafish serve as a viable genetic model for pancreas development.

March 1, 1998EndocrinologyOpen Access

Conservation of PDX-1 Structure, Function, and Expression in Zebrafish*

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Authors

WMWieslawa MilewskiUniversity of Chicago SDStephen J. DuguayNational Institutes of Health SCShu Jin ChanUniversity of Chicago

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Implication

Laboratory study demonstrates evolutionary conservation of PDX-1 structure and function in zebrafish, indicating preserved mechanisms of vertebrate pancreatic development.

Key Points

To clone and characterize PDX-1 and preproinsulin in zebrafish to determine whether zebrafish serve as a viable genetic model for pancreas development.
Cloned and sequenced zebrafish PDX-1 and preproinsulin cDNA.
Assessed spatial and temporal expression profiles during embryonic development and adult stages via in situ hybridization.
Evaluated functional transcription activation and DNA binding properties on insulin gene promoters compared to mouse PDX-1.
Deduced zebrafish PDX-1 sequence contains 246 amino acids and shares 95% identity with mammalian PDX-1 in the homeodomain.
In situ hybridization revealed biphasic coexpression of PDX-1 and insulin during embryogenesis (with insulin detected before 44 hours post-fertilization) and marked expression in adult pyloric caeca.
Zebrafish PDX-1 stimulated insulin gene transcription as effectively as mouse PDX-1, with maximum promoter activation requiring four intact A elements.

Cite This Study

Milewski et al. (1998) studied this question.

synapsesocial.com/papers/6a7a6ab314b028facf0e58c2 https://doi.org/10.1210/endo.139.3.5768

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Implication

Laboratory study demonstrates evolutionary conservation of PDX-1 structure and function in zebrafish, indicating preserved mechanisms of vertebrate pancreatic development.

Conservation of PDX-1 Structure, Function, and Expression in Zebrafish*

Discussion

Member takes

Implication

Key Points

Cite This Study

Conservation of PDX-1 Structure, Function, and Expression in Zebrafish*

Discussion

Member takes

Implication

Key Points

Cite This Study

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