Targeting the Prostaglandin F2α Receptor for Preventing Preterm Labor with Azapeptide Tocolytics
摘要:
The prostaglandin-F2 alpha (PGF2 alpha) receptor (FP) was targeted to develop tocolytic agents for inhibiting preterm labor. Azabicycloalkane and azapeptide mimics 2-10 were synthesized based on the (3S,6S,9S)-indolizidin-2-one amino acid analogue PDC113.824 (1), which was shown to modulate FP by a biased allosteric mechanism, involving both G alpha q- and G alpha 12-mediated signaling pathways, and exhibited significant tocolytic activity delaying preterm labor in a mouse model (Goupil; J. Biol. Chem. 2010, 285,25624-25636), Although changes in azabicycloalkane stereochemistry and ring size caused loss of activity, replacement of the indolizidin-2-one amino acid with azaGly-Pro and azaPhe-Pro gave azapeptides 6 and 8, which reduced PGF2 alpha-induced myometrial contractions, potentiated the effect of PGF2 alpha on G alpha q-mediated ERK1/2 activation, and inhibited FP modulation of cell ruffling, a response dependent on the G alpha 12/RhoA/ROCK signaling pathway. Revealing complementarities of azabicycloalkane and azapeptide mimics, novel probes, and efficient tocolytic agents were made to study allosteric modulation of the FP receptor.
Targeting the Prostaglandin F2α Receptor for Preventing Preterm Labor with Azapeptide Tocolytics
摘要:
The prostaglandin-F2 alpha (PGF2 alpha) receptor (FP) was targeted to develop tocolytic agents for inhibiting preterm labor. Azabicycloalkane and azapeptide mimics 2-10 were synthesized based on the (3S,6S,9S)-indolizidin-2-one amino acid analogue PDC113.824 (1), which was shown to modulate FP by a biased allosteric mechanism, involving both G alpha q- and G alpha 12-mediated signaling pathways, and exhibited significant tocolytic activity delaying preterm labor in a mouse model (Goupil; J. Biol. Chem. 2010, 285,25624-25636), Although changes in azabicycloalkane stereochemistry and ring size caused loss of activity, replacement of the indolizidin-2-one amino acid with azaGly-Pro and azaPhe-Pro gave azapeptides 6 and 8, which reduced PGF2 alpha-induced myometrial contractions, potentiated the effect of PGF2 alpha on G alpha q-mediated ERK1/2 activation, and inhibited FP modulation of cell ruffling, a response dependent on the G alpha 12/RhoA/ROCK signaling pathway. Revealing complementarities of azabicycloalkane and azapeptide mimics, novel probes, and efficient tocolytic agents were made to study allosteric modulation of the FP receptor.
Investigation of the active turn geometry for the labour delaying activity of indolizidinone and azapeptide modulators of the prostaglandin F<sub>2α</sub> receptor
作者:Meriem K. Boukanoun、Xin Hou、Ljiljana Nikolajev、Sara Ratni、David Olson、Audrey Claing、Stéphane A. Laporte、Sylvain Chemtob、William D. Lubell
DOI:10.1039/c5ob00962f
日期:——
The bioactive turn geometry of prostaglandin F2α receptor modulators was investigated in pursuit of molecules that delay labor.
Paired Utility of Aza-Amino Acyl Proline and Indolizidinone Amino Acid Residues for Peptide Mimicry: Conception of Prostaglandin F2α Receptor Allosteric Modulators That Delay Preterm Birth
作者:Fatemeh M. Mir、N. D. Prasad Atmuri、Carine B. Bourguet、Jennifer Rodon Fores、Xin Hou、Sylvain Chemtob、William D. Lubell
DOI:10.1021/acs.jmedchem.9b00056
日期:2019.5.9
Peptide mimicry employing a combination of aza-amino acyl proline and indolizidinone residues has been used to develop allosteric modulators of the prostaglandin F2α receptor. The systematic study of the N-terminal phenylacetyl moiety and the conformation and side chain functions of the central turn dipeptide residue has demonstrated the sensitive relationships between modulator activity and topology
6-Hydroxymethyl Indolizidin-2-one Amino Acid Synthesis, Conformational Analysis, and Biomedical Application as Dipeptide Surrogates in Prostaglandin-F<sub>2α</sub> Modulators
作者:Ramakotaiah Mulamreddy、Xin Hou、Sylvain Chemtob、William D. Lubell
DOI:10.1021/acs.orglett.1c01733
日期:2021.7.2
6-Hydroxymethyl indolizidin-2-one amino acids were synthesized in 10 steps from l-serine by intramolecularringopening of a symmetrical epoxide and lactam formation. X-ray analyses indicated the bicycles replicated ideal peptide type II′ β-turn central dihedral angle geometry. Inside a prostaglandin-F2α receptor modulator, the 6-hydroxymethyl analogue retained inhibitory activity on myometrial contractility
Synthesis of 5‐ and 7‐hydroxy indolizidin‐2‐one prostaglandin‐F
<sub>2α</sub>
modulators and activity on myometrial contractility towards development of agents for delaying preterm birth
作者:Ramakotaiah Mulamreddy、Xin Hou、Sylvain Chemtob、William D. Lubell
DOI:10.1002/psc.3455
日期:2023.3
In pursuit of more effective‐labor delaying tocolytic agents, the prostaglandin F2α (PGF2α) receptor (FP) modulator PDC113.824 [(6S)‐2] represents a potent lead for developing therapy to treat preterm birth. Derivatives of FP modulator (6S)‐2 were synthesized, possessing respectively 5‐ and 7‐hydroxyl groups on the indolizidin‐2‐one amino acid (I2aa) residue. The effects of the alcohol substituents were examined in a PGF2α‐induced myometrial contraction assay. Based on knowledge of dihedral angle values of model I2aa peptides from X‐ray analyses, the results of the study indicate respectively encouraging and limited potential for creating improved tocolytic agents by modifications at the 5‐ and 7‐positions.