Genetic association has been found between the CACNA1G gene and autism in the AGRE cohort (Strom et al., 2010). Recently, a de novo synonymous variant in this gene was identified in an ASD proband from the Simons Simplex Collection (Iossifov et al., 2012).
Molecular Function
Voltage-activated calcium channels
External Links
References
Type
Title
Type of Disorder
Associated Disorders
Author, Year
Primary
High-density SNP association study of the 17q21 chromosomal region linked to autism identifies CACNA1G as a novel candidate gene.
Modulation of the intrinsic firing pattern mediated by alpha(1G) T-type Ca(2+) channels plays a critical role in the genesis of absence seizures in the thalamocortical pathway.
References
Type
Title
Author, Year
Primary
Lack of the burst firing of thalamocortical relay neurons and resistance to absence seizures in mice lacking alpha(1G) T-type Ca(2) channels.
Model Type:
Genetic
Model Genotype:
Homozygous
Mutation:
Null mutation of the 1G subunit of T-type Ca2+ channels.
Allele Type: Targeted (knock-out)
Strain of Origin: C57/BL6
Genetic Background: Not Specified
ES Cell Line: J1
Mutant ES Cell Line: Not Specified
Model Source: Not Specified
Model Type:
Pharmaceutical intervention
Model Genotype:
Homozygous
Mutation:
Cacna1G null mice were treated with a chemical ** to induce seizures.
Allele Type: Targeted (knock-out)
Strain of Origin: C57/BL6
Genetic Background: Not Specified
ES Cell Line: J1
Mutant ES Cell Line: Not Specified
Model Source: Not Specified
Model Type:
Genetic
Model Genotype:
Homozygous
Mutation:
loxP sequences placed in introns flanking exons 9-12 of the gene encoding Cav3.1 were deleted by crossing with globally targeted Cre transgenic mice.
Allele Type: Targeted (knock-out)
Strain of Origin: C57/BL6
Genetic Background: Not Specified
ES Cell Line: C57/BL7
Mutant ES Cell Line: Not Specified
Model Source: Not Specified
Model Type:
Genetic
Model Genotype:
Homozygous
Mutation:
Conditional deletion of exons 9-12 of the CACNA1G gene encoding Cav3.1 using K128-Cre mainly in thalamic nuclei
Allele Type: Conditional loss-of-function
Strain of Origin: C57/BL6
Genetic Background: Not Specified
ES Cell Line: C57/BL7
Mutant ES Cell Line: Not Specified
Model Source: Not Specified
Model Type:
Genetic
Model Genotype:
Homozygous
Mutation:
Null mutation of the 1G subunit of T-type Ca2+ channels.
Allele Type: Targeted (knock-out)
Strain of Origin: C57/BL6J
Genetic Background: 129/Sv
ES Cell Line: Not Specified
Mutant ES Cell Line: Not Specified
Model Source: Not Specified
Model Type:
Genetic
Model Genotype:
Homozygous
Mutation:
shRNA mediated knockdown of alpha1G T-type channels in the periaqueuctal gray (PAG) delivered via stereotaxic surgery.
Allele Type: Targeted (Knock-Down)
Strain of Origin: Not Specified
Genetic Background: 129/sv or C57BL/6J
ES Cell Line: Not Specified
Mutant ES Cell Line: Not Specified
Model Source: Not Specified
Model Type:
Genetic
Model Genotype:
Hemizygous
Mutation:
Optimized circuit-based crispr-cas9 viral approach included a retrograde rv-expressing cre (rvdgl-cre) injected in presub and a virus expressing target guide rnas combined with a cre-dependent spcas9 virus (aav9-sgrna-mch) injected in ad, to knock down cacna1g in ad
Allele Type: Knockdown
Strain of Origin: Genetic Background: C57BL/6J
ES Cell Line: Mutant ES Cell Line: Model Source: 34197733
Description: Increased discharge activity during met-enkephalin (me) treatment of gabaergic neurons from the ventrolateral periaquaductal gray area
Exp Paradigm: Whole-cell patch clamp recording of gabaergic neurons in response to me treatment
Description: Increased range of discharge activity between low-threshold spikes positive- and negative- gabaergic neurons
Exp Paradigm: Whole-cell patch clamp recording of discharge activity of gabaergic neurons in pag slices
Description: No burst firing of action potentials were observed.
Exp Paradigm: Intracellular recording with a current clamp in thalamic slice preparation.
Description: Decreased levels of swim-stress induced analgesia (ssia)
Exp Paradigm: Hot-plate sensitivity test before and after stress induced by swimming
Electroencephalogram (eeg): signature of seizure/epilepsy1
Decreased
Description: Reduced amplitude of peaks and desynchronized spike-and-wave discharge from thalamus
Exp Paradigm: Chemically induced seizures monitored with electrodes placed in the thalamus to monitor wave patterns
Description: Cacna1g null mice do not display typical spike and wave discharge patterns
Exp Paradigm: Chemically induced seizures monitored with eeg for wave pattern
Description: Decreased tremor activities in response to harmaline
Exp Paradigm: Observation of abberant behavior such as tremors in response to administration of i.p 9 mg/kg harmaline
Description: Increased tremor activity in response to administratino of oxotremorine, physostigmine, and penitrem-a
Exp Paradigm: Observation of abberant behavior such as tremors in response to drug treatment
Description: Decreased induction of 4-to 10-hz osscilations in inferior olive (io) and deep cerebellar nuclei (dcn) neurons; rhythmic spiking activities; and lfp osscilations in io
Exp Paradigm: Simultaneous recordings of lfp and multiunit spikes in io and dcn
Description: Decreased subthreshold osscilations at resting membrane potentials, and rhythmicity of spike activities
Exp Paradigm: Whole-cell patch clamp recordings in io neurons after a continous increase in harmaline concentration
Description: Decreased levels of swim-stress induced analgesia (ssia)
Exp Paradigm: Hot-plate sensitivity test before and after stress induced by swimming