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Chemical Structure| 1443246-62-5 Chemical Structure| 1443246-62-5

Structure of ML 297
CAS No.: 1443246-62-5

Chemical Structure| 1443246-62-5

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ML 297 is a potent and selective GIRK1/2 activator, with an EC50 of 0.16 μM.

Synonyms: VU 0456810; CID 56642816

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Product Details of ML 297

CAS No. :1443246-62-5
Formula : C17H14F2N4O
M.W : 328.32
SMILES Code : O=C(NC1=CC(C)=NN1C2=CC=CC=C2)NC3=CC=C(F)C(F)=C3
Synonyms :
VU 0456810; CID 56642816
MDL No. :MFCD27977571
InChI Key :IEKSMUSSYJUQMY-UHFFFAOYSA-N
Pubchem ID :56642816

Safety of ML 297

GHS Pictogram:
Signal Word:Danger
Hazard Statements:H302-H361-H372-H410
Precautionary Statements:P201-P264-P280-P301+P330+P331-P312
Class:9
UN#:3077
Packing Group:

Isoform Comparison

Biological Activity

In Vitro:

Cell Line
Concentration Treated Time Description References
Hippocampal neurons 10 μM ML297 induced inward currents in wild-type hippocampal neurons but no response was observed in Kcnj3−/− neurons. Br J Pharmacol. 2019 Jul;176(13):2238-2249
Hippocampal neurons 377±70 nM (EC50) ML297 evoked a concentration-dependent inward current in hippocampal neurons from wild-type mice, but had negligible effects in neurons from Girk1−/−mice. Proc Natl Acad Sci U S A. 2014 Jul 22;111(29):10755-60
HEK293 cells 233 ±38 nM (EC50) ML297 selectively activates recombinant neuronal GIRK channels containing the GIRK1 subunit in a manner that requires phosphatidylinositol-4,5-bisphosphate (PIP2), but is otherwise distinct from receptor-induced, G-protein –dependent channel activation. Proc Natl Acad Sci U S A. 2014 Jul 22;111(29):10755-60
murine K cells 100 μM 2 hours ML297 had no effect on basal or IBMX-induced GIP secretion Br J Pharmacol. 2016 Mar;173(5):888-98
murine L cells 100 μM 2 hours ML297 significantly reduced glucose-stimulated and IBMX-stimulated GLP-1 secretion Br J Pharmacol. 2016 Mar;173(5):888-98
lOFC neurons 10 μM 10 minutes ML297 significantly decreased AP spiking of lOFC neurons, indicating that GIRK channel activation can inhibit neuronal excitability. Neuropsychopharmacology. 2017 Aug;42(9):1800-1812
hippocampal CA1 neurons 10 μM ML297 caused hyperpolarization, decreased input resistance, and blocked spontaneous action potentials Sleep. 2019 Mar 1;42(3):zsy244
hypocretin neurons 5 μM ML297 caused long-lasting hyperpolarization, decreased input resistance, and blocked spontaneous firing of action potentials Sleep. 2019 Mar 1;42(3):zsy244
BA principal neurons 10 μM To evaluate GIRK-dependent currents induced by ML297 in BA principal neurons J Neurosci. 2021 Jul 7;41(27):5809-5821
vDG granule cells 10 μM To evaluate GIRK-dependent currents induced by ML297 in vDG granule cells J Neurosci. 2021 Jul 7;41(27):5809-5821
vCA3 pyramidal neurons 10 μM To evaluate GIRK-dependent currents induced by ML297 in vCA3 pyramidal neurons J Neurosci. 2021 Jul 7;41(27):5809-5821

In Vivo:

Species
Animal Model
Administration Dosage Frequency Description References
Mice Stress-induced hyperthermia model Intraperitoneal injection 30 mg/kg Single dose, tested after 30 minutes ML297 dose-dependently reduced stress-induced hyperthermia in mice without affecting baseline body temperature. Br J Pharmacol. 2019 Jul;176(13):2238-2249
Mice Wild-type and Girk1−/−mice Intraperitoneal injection 3, 10, 30, 60 mg/kg Single dose ML297 suppressed motor activity at the highest dose (60 mg/kg), but lower doses (3, 10, 30 mg/kg) had no impact. ML297 at 30 mg/kg significantly reduced anxiety-related behavior without sedative or addictive effects. The anxiolytic effect of ML297 was lost in Girk1?/?mice. Proc Natl Acad Sci U S A. 2014 Jul 22;111(29):10755-60
Mice Fmr1—/y mouse model Intraperitoneal injection 30 mg/kg Single administration, recorded for 24 hours ML297 partially reversed the reduced NREM sleep and fragmented architecture in Fmr1—/y mice, improved sleep EEG oscillations, and EEG coherence between cortical areas. Additionally, ML297 administration following contextual fear or spatial learning rescued disrupted memory consolidation in Fmr1—/y mice. Cell Rep. 2024 Jun 25;43(6):114266
Mice Chronic unpredictable stress (CUS) model Systemic injection 20 mg/kg Single administration ML297 rescued stress-induced deficits in cognitive flexibility in male mice. Neuropsychopharmacology. 2021 Nov;46(12):2158-2169
Mice Grin1 mutant mice Intraperitoneal injection 30 mg/kg Single dose, 30 minutes pretreatment Pretreatment with ML297 significantly reduced the cumulative numbers of spontaneous LFP activities in Grin1 mutant mice following acoustic stimulation, indicating suppression of 5-HT2AR-mediated cortical hyper-excitability via GIRK channel activation. Transl Psychiatry. 2022 Apr 22;12(1):168
Mice Contextual fear conditioning (CFC) model Intraperitoneal injection 30 mg/kg Single dose, observed for 24 hours ML297 restored REM sleep post-CFC, improved fear memory consolidation, and increased hippocampal neuron activation during memory recall Sleep. 2023 Mar 9;46(3):zsac301
Mice Intraperitoneal injection 30 mg/kg Once daily for 3 consecutive days ML297 decreased wakefulness and increased NREM sleep time without altering REM sleep Sleep. 2019 Mar 1;42(3):zsy244
Female mice Alcohol dependence model In vitro electrophysiological recording 10 μM Single administration ML297 significantly decreased the excitability of lOFC neurons by activating GIRK channels. Following chronic intermittent ethanol (CIE) exposure, ML297 no longer inhibited neuronal firing. Neuropharmacology. 2018 Jul 15;137:1-12
Male C57BL/6J mice EPM test Intraperitoneal injection 30 mg/kg Single dose, 30 min before testing To evaluate the effect of ML297 on avoidance behavior in the EPM test J Neurosci. 2021 Jul 7;41(27):5809-5821

Protocol

Bio Calculators
Preparing Stock Solutions 1mg 5mg 10mg

1 mM

5 mM

10 mM

3.05mL

0.61mL

0.30mL

15.23mL

3.05mL

1.52mL

30.46mL

6.09mL

3.05mL

Dissolving Methods
Please choose the appropriate dissolution scheme according to your animal administration guide.For the following dissolution schemes, clear stock solution should be prepared according to in vitro experiments, and then cosolvent should be added in turn:

in order to ensure the reliability of the experimental results, the clarified stock solution can be properly preserved according to the storage conditions; The working fluid for in vivo experiment is recommended to be prepared now and used on the same day;

The percentage shown in front of the following solvent refers to the volume ratio of the solvent in the final solution; If precipitation or precipitation occurs in the preparation process, it can be assisted by heating and/or ultrasound.
Protocol 1
Protocol 2

References

 

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