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Autoinflammatory disorders v3.5 PLCG1 Ida Ertmanska Classified gene: PLCG1 as Amber List (moderate evidence)
Autoinflammatory disorders v3.5 PLCG1 Ida Ertmanska Added comment: Comment on list classification: There are now 3 unrelated individuals with heterozygous PLCG1 variants and an immune dysregulation disorder, including variable autoimmune feature. Hence, this gene should be promoted to Green at the next update.
Autoinflammatory disorders v3.5 PLCG1 Ida Ertmanska Gene: plcg1 has been classified as Amber List (Moderate Evidence).
Autoinflammatory disorders v3.4 PLCG1 Ida Ertmanska gene: PLCG1 was added
gene: PLCG1 was added to Autoinflammatory disorders. Sources: Literature
Q2_26_promote_green tags were added to gene: PLCG1.
Mode of inheritance for gene: PLCG1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: PLCG1 were set to 37422272; 40862571
Phenotypes for gene: PLCG1 were set to ?Immune dysregulation, autoimmunity, and autoinflammation, OMIM:620514; immune dysregulation, autoimmunity, and autoinflammation, MONDO:0957790
Review for gene: PLCG1 was set to GREEN
Added comment: PMID: 40862571 Ma et al., 2025 (based on pre-print mentioned in previous reviews)
Report of seven individuals from 4 unrelated families with heterozygous missense variants in PLCG1: 3 individuals with de novo het variants: c.3056A>G, p.(Asp1019Gly)], [c.1139A>G, p.(His380Arg)] and [c.3494A>G, p.(Asp1165Gly)]. Individuals 4–7 are from the same family, and all carry the PLCG1 variant [c.1789C>T p.(Leu597Phe)].
Phenotypic spectrum: hearing loss (5/7, mild to profound), cardiac septal defects (3/6), and other less specific syndromic findings. Abnormal brain MRI findings in 2/3 assessed. Various immunological issues included:
P3: T lymphocytopenia, recurrent pulmonary infections;
P4: joint inflammation, tarsal synovitis, recurrent respiratory and lung infections, as well as inflammatory lymphadenopathy;
P5: immune thrombocytopenic purpura, polyarthritis, autoimmune pulmonary fibrosis, pneumococcal sepsis with chronic thrombocytopenia and IgA and IgG2 deficiency;
P6: history of recurrent upper respiratory and lung infections due to a mild IgA and IgG2 deficiency;

PMID: 37422272 Tao et al., 2024
7yo female patient with a de novo p.S1021F variant in PLCG1 and early-onset immune dysregulation disease: recurrent skin ecchymosis, epistaxis and gingival bleeding, lymphadenopathy. No mention of hearing loss.
Sources: Literature