The final walk with preptin

Preptin, a 34-amino acid peptide derived from pro-IGF2, is believed to influence various physiological processes, including insulin secretion and the regulation of bone metabolism. Despite its recognized involvement, the precise physiological role of preptin remains enigmatic. To address this knowle...

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Published in:PloS one 2024-09, Vol.19 (9), p.e0309726
Main Authors: Mrázková, Lucie, Lubos, Marta, Voldřich, Jan, Kužmová, Erika, Zrubecká, Denisa, Gwozdiaková, Petra, Buděšínský, Miloš, Asai, Seiya, Marek, Aleš, Pícha, Jan, Tencerová, Michaela, Ferenčáková, Michaela, Barrera, Glenda Alquicer, Kaminský, Jakub, Jiráček, Jiří, Žáková, Lenka
Format: Article
Language:English
Subjects:
Amino acids
Analogs
Analysis
Animals
Biochemistry
Biological activity
Biological effects
Biology and Life Sciences
Bone turnover
Chromatography
Diabetes
Health aspects
Humans
Instrument industry
Insulin
Insulin - metabolism
Insulin secretion
Insulin-like growth factor II
Insulin-Like Growth Factor II - metabolism
Medicine and Health Sciences
Mice
Organic chemistry
Penicillin
Peptide Fragments - metabolism
Peptides
Physiological effects
Physiology
Polypeptides
Protein Precursors - metabolism
Rats
Research and Analysis Methods
Solvents
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Summary:Preptin, a 34-amino acid peptide derived from pro-IGF2, is believed to influence various physiological processes, including insulin secretion and the regulation of bone metabolism. Despite its recognized involvement, the precise physiological role of preptin remains enigmatic. To address this knowledge gap, we synthesized 16 analogs of preptin, spanning a spectrum from full-length forms to fragments, and conducted comprehensive comparative activity evaluations alongside native human, mouse and rat preptin. Our study aimed to elucidate the physiological role of preptin. Contrary to previous indications of broad biological activity, our thorough analyses across diverse cell types revealed no significant biological activity associated with preptin or its analogs. This suggests that the associations of preptin with various diseases or tissue-specific abundance fluctuations may be influenced by factors beyond preptin itself, such as higher levels of IGF2 or IGF2 proforms present in tissues. In conclusion, our findings challenge the conventional notion of preptin as an isolated biologically active molecule and underscore the complexity of its interactions within biological systems. Rather than acting independently, the observed effects of preptin may arise from experimental conditions, elevated preptin concentrations, or interactions with related molecules such as IGF2.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0309726