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Malignant Hyperthermia Susceptibility v1.8 Zornitza Stark Panel types changed to Victorian Clinical Genetics Services; Royal Melbourne Hospital; Rare Disease
Malignant Hyperthermia Susceptibility v1.7 Zornitza Stark HPO terms changed from to Malignant hyperthermia, HP:0002047; Rhabdomyolysis, HP:0003201
List of related panels changed from to Malignant hyperthermia; HP:0002047; Rhabdomyolysis; HP:0003201
Malignant Hyperthermia Susceptibility v1.6 ASPH Zornitza Stark Phenotypes for gene: ASPH were changed from Exertional heat illness; malignant hyperthermia susceptibility HP:0002047, ASPH-related to Exertional heat illness; malignant hyperthermia susceptibility, MONDO:0018493, ASPH-related
Malignant Hyperthermia Susceptibility v1.5 ASPH Zornitza Stark Marked gene: ASPH as ready
Malignant Hyperthermia Susceptibility v1.5 ASPH Zornitza Stark Gene: asph has been classified as Amber List (Moderate Evidence).
Malignant Hyperthermia Susceptibility v1.5 ASPH Zornitza Stark Phenotypes for gene: ASPH were changed from Exertional heat illness; malignant hyperthermia susceptibility to Exertional heat illness; malignant hyperthermia susceptibility HP:0002047, ASPH-related
Malignant Hyperthermia Susceptibility v1.4 ASPH Zornitza Stark Classified gene: ASPH as Amber List (moderate evidence)
Malignant Hyperthermia Susceptibility v1.4 ASPH Zornitza Stark Gene: asph has been classified as Amber List (Moderate Evidence).
Malignant Hyperthermia Susceptibility v1.3 ASPH Paul De Fazio gene: ASPH was added
gene: ASPH was added to Malignant Hyperthermia Susceptibility. Sources: Literature
Mode of inheritance for gene: ASPH was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: ASPH were set to 35697689
Phenotypes for gene: ASPH were set to Exertional heat illness; malignant hyperthermia susceptibility
Review for gene: ASPH was set to AMBER
gene: ASPH was marked as current diagnostic
Added comment: In a study of 103 individuals (63 affected from 34 families, plus 40 sporadic cases) who had either a sentinel event of EHI or MH, or else a positive CHCT and a first degree releative with EHI/MH, and where RYR1 and CACNA1S Sanger sequencing was negative, the following variants in ASPH were identified in unrelated individuals:

- c.161T > C in 2 members of a family with myalgias exacerbated by heat/exercise. One had elevated CK. Both had positive CHCT. An unaffected sibling did not have the variant. 27 hets in gnomad v2 / 17 hets in gnomad v3.
- c.445G>C in a patient with MH, myalgias and muscle cramps worsened by heat and exercise. 4 hets in gnomad v2 / 3 hets in gnomad v3. Non-coding in the MANE transcript.
- c.263A > C in a patient with EHI, diagnosed as MHN by in vitro contracture test. Absent from gnomad but non-coding in the MANE transcript.
- c.605A > G in a patient with EHI, diagnosed as MHN by in vitro contracture test. 223 hets in gnomad v2 / 120 hets in gnomad v3; no homs. Non-coding in the MANE transcript.

A zebrafish model and cell line functional studies supported pathogenicity of the c.161T > C and c.263A > C variants.
Sources: Literature
Malignant Hyperthermia Susceptibility v1.3 ATP2A1 Bryony Thompson Marked gene: ATP2A1 as ready
Malignant Hyperthermia Susceptibility v1.3 ATP2A1 Bryony Thompson Gene: atp2a1 has been classified as Amber List (Moderate Evidence).
Malignant Hyperthermia Susceptibility v1.3 ATP2A1 Bryony Thompson Classified gene: ATP2A1 as Amber List (moderate evidence)
Malignant Hyperthermia Susceptibility v1.3 ATP2A1 Bryony Thompson Gene: atp2a1 has been classified as Amber List (Moderate Evidence).
Malignant Hyperthermia Susceptibility v1.2 ATP2A1 Bryony Thompson gene: ATP2A1 was added
gene: ATP2A1 was added to Malignant Hyperthermia Susceptibility. Sources: Literature
Mode of inheritance for gene: ATP2A1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: ATP2A1 were set to 32040565
Phenotypes for gene: ATP2A1 were set to Brody myopathy MIM#601003
Review for gene: ATP2A1 was set to AMBER
Added comment: In a study of 40 Brody disease cases, 3 unrelated cases with biallelic variants had positive in vitro contracture tests on muscle biopsy, and 2 of these cases had episode(s) of suspected MH following administration of general anaesthetics. An additional case experienced several episodes of unexplained hyperthermia, but had not undergone IVCT. 8 other cases reported in the cohort have undergone general anaesthesia without any adverse reactions.
Sources: Literature
Malignant Hyperthermia Susceptibility v1.1 TRPV1 Bryony Thompson Publications for gene: TRPV1 were set to
Malignant Hyperthermia Susceptibility v1.0 Bryony Thompson promoted panel to version 1.0
Malignant Hyperthermia Susceptibility v0.12 Bryony Thompson Panel status changed from internal to public
Malignant Hyperthermia Susceptibility v0.11 TRPV1 Bryony Thompson changed review comment from: 3 cases with a muscle biopsy sensitive for halothane but not for caffeine, MHSh, and a single case susceptible to both (MHS). One of the MHSh cases was from a family with RYR1-associated myopathy, where the TRPV1 occurred with RYR1 variants. Two of the cases had a clinical diagnosis of malignant hyperthermia and two of the cases had an exertional heat stress episode. Supporting functional assays in HEK293 cells and trpv1 -/- mouse muscle, demonstrated impairment of intracellular Ca2+ signaling.; to: 3 cases with a muscle biopsy sensitive for halothane but not for caffeine, MHSh, and a single case susceptible to both (MHS). One of the MHSh cases was from a family with RYR1-associated myopathy, where the TRPV1 occurred with RYR1 variants. Two of the cases had a clinical diagnosis of malignant hyperthermia and two of the cases had an exertional heat stroke episode. Supporting functional assays in HEK293 cells and trpv1 -/- mouse muscle, demonstrated impairment of intracellular Ca2+ signaling.
Malignant Hyperthermia Susceptibility v0.11 TRPV1 Bryony Thompson edited their review of gene: TRPV1: Changed phenotypes: Malignant hyperthermia susceptibility, exertional heat stroke
Malignant Hyperthermia Susceptibility v0.11 TRPV1 Bryony Thompson Classified gene: TRPV1 as Amber List (moderate evidence)
Malignant Hyperthermia Susceptibility v0.11 TRPV1 Bryony Thompson Gene: trpv1 has been classified as Amber List (Moderate Evidence).
Malignant Hyperthermia Susceptibility v0.10 TRPV1 Bryony Thompson reviewed gene: TRPV1: Rating: AMBER; Mode of pathogenicity: None; Publications: 29930394, 32471784; Phenotypes: Malignant hyperthermia susceptibility, exertional heat stress; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Malignant Hyperthermia Susceptibility v0.8 STAC3 Bryony Thompson Marked gene: STAC3 as ready
Malignant Hyperthermia Susceptibility v0.8 STAC3 Bryony Thompson Gene: stac3 has been classified as Green List (High Evidence).
Malignant Hyperthermia Susceptibility v0.8 STAC3 Bryony Thompson Classified gene: STAC3 as Green List (high evidence)
Malignant Hyperthermia Susceptibility v0.8 STAC3 Bryony Thompson Gene: stac3 has been classified as Green List (High Evidence).
Malignant Hyperthermia Susceptibility v0.7 STAC3 Bryony Thompson gene: STAC3 was added
gene: STAC3 was added to Malignant Hyperthermia Susceptibility. Sources: Expert list
Mode of inheritance for gene: STAC3 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: STAC3 were set to 30168660; 32898259
Phenotypes for gene: STAC3 were set to Myopathy, congenital, Baily-Bloch MIM#255995
Review for gene: STAC3 was set to GREEN
Added comment: The rarest cause of malignant hyperthermia susceptibility. Currently, MHS has only been identified with the biallelic cases with myopathy. Pathogenic variants impair skeletal muscle excitation–contraction coupling.
Sources: Expert list
Malignant Hyperthermia Susceptibility v0.6 TRPV1 Bryony Thompson gene: TRPV1 was added
gene: TRPV1 was added to Malignant Hyperthermia Susceptibility. Sources: Literature
Mode of inheritance for gene: TRPV1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Phenotypes for gene: TRPV1 were set to Malignant hyperthermia susceptibility
Malignant Hyperthermia Susceptibility v0.5 CACNB1 Bryony Thompson gene: CACNB1 was added
gene: CACNB1 was added to Malignant Hyperthermia Susceptibility. Sources: Other
Mode of inheritance for gene: CACNB1 was set to Unknown
Phenotypes for gene: CACNB1 were set to Malignant hyperthermia susceptibility
Malignant Hyperthermia Susceptibility v0.4 RYR1 Bryony Thompson edited their review of gene: RYR1: Set current diagnostic: yes
Malignant Hyperthermia Susceptibility v0.4 CACNA1S Bryony Thompson edited their review of gene: CACNA1S: Set current diagnostic: yes
Malignant Hyperthermia Susceptibility v0.4 CACNA1S Bryony Thompson Marked gene: CACNA1S as ready
Malignant Hyperthermia Susceptibility v0.4 CACNA1S Bryony Thompson Gene: cacna1s has been classified as Green List (High Evidence).
Malignant Hyperthermia Susceptibility v0.4 CACNA1S Bryony Thompson Classified gene: CACNA1S as Green List (high evidence)
Malignant Hyperthermia Susceptibility v0.4 CACNA1S Bryony Thompson Gene: cacna1s has been classified as Green List (High Evidence).
Malignant Hyperthermia Susceptibility v0.3 CACNA1S Bryony Thompson gene: CACNA1S was added
gene: CACNA1S was added to Malignant Hyperthermia Susceptibility. Sources: Expert list
Mode of inheritance for gene: CACNA1S was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: CACNA1S were set to 20301325
Phenotypes for gene: CACNA1S were set to {Malignant hyperthermia susceptibility 5} MIM#601887
Mode of pathogenicity for gene: CACNA1S was set to Other
Review for gene: CACNA1S was set to GREEN
Added comment: Gain of function variants are the second most common cause of malignant hyperthermia susceptibility.
Sources: Expert list
Malignant Hyperthermia Susceptibility v0.2 RYR1 Bryony Thompson Marked gene: RYR1 as ready
Malignant Hyperthermia Susceptibility v0.2 RYR1 Bryony Thompson Gene: ryr1 has been classified as Green List (High Evidence).
Malignant Hyperthermia Susceptibility v0.2 RYR1 Bryony Thompson Classified gene: RYR1 as Green List (high evidence)
Malignant Hyperthermia Susceptibility v0.2 RYR1 Bryony Thompson Gene: ryr1 has been classified as Green List (High Evidence).
Malignant Hyperthermia Susceptibility v0.1 RYR1 Bryony Thompson gene: RYR1 was added
gene: RYR1 was added to Malignant Hyperthermia Susceptibility. Sources: Expert list
Mode of inheritance for gene: RYR1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: RYR1 were set to 20301325
Phenotypes for gene: RYR1 were set to {Malignant hyperthermia susceptibility 1} MIM#145600
Mode of pathogenicity for gene: RYR1 was set to Other
Review for gene: RYR1 was set to GREEN
Added comment: Gain-of-function RYR1 variants are the most common cause of malignant hyperthermia
Sources: Expert list
Malignant Hyperthermia Susceptibility v0.0 Bryony Thompson Added Panel Malignant Hyperthermia Susceptibility
Set panel types to: Royal Melbourne Hospital; Rare Disease