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Mendeliome v1.4150 PLXNA1 Lucy Spencer edited their review of gene: PLXNA1: Added comment: reported phenotype expansion for monoallelic Kallman syndrome:
PMIDs 28334861 13 families with Kallman syndrome, however only 3 of these variants (His684Tyr Lys1618Thr Cys1744Phe) are absent from gnomad, the rest have at least 6 hets and most have over 20 hets. in transfected cells His684Tyr, Lys1618Thr and some of the common missense variants were shown to result in reduced total amounts of protein. In a minigene assay Cys1744Phe which is at the last base of an exon was shown to cause intron 28 retention which would be out of frame. No variants in this study were noted to be de novo.

PMID: 30467832 10 missense variants identified in patients with hypogonadotropic hypogonadism. Again some of the reported missense have over 20 hets in gnomad but 5 of the variants are rare or absent Lys1451Arg, Ser1850Arg, Ile1701Val, Pro485Leu and Val536Ile. All of these variants were either inherited from a parent or inheritance was unknown, and 1 individual had a better diagnosis with a nonsense in FGFR1 while other patients had variants in other genes amber for HH. No variants in this study were noted to be de novo.

PMID: 34636164 another 10 missense variants identified in 11 families with hypogonadotropic hypogonadism. However, only 3 were not common in gnomad; Pro848Arg, Ala1106Val, and Ser1709Leu. Ala1106Val and Ser1709Leu were both inherited from unaffected mothers, and most patients in this study also had variants of interest in other genes. No variants in this study were noted to be de novo.

So at least 10 reports of variants that are rare/absent in gnomad with Kallman syndrome, all missense variants, most without segregation information or inherited from unaffected/unknown if affected parents. Some with a bit of functional work. Many patients also have variants of interest in other genes amber or green for the same phenotype. borderline amber/green; Changed rating: AMBER; Changed phenotypes: Hypogonadotropic hypogonadism MONDO:0018555, PLXNA1-related
Mendeliome v1.2478 FGFR1 Bryony Thompson Publications for gene: FGFR1 were set to 18034870; 23812909; 26942290; 16470795; 15625620; 29147600; 20339250
Mendeliome v1.2477 FGFR1 Bryony Thompson Publications for gene: FGFR1 were set to 18034870; 23812909; 26942290
Mendeliome v0.13683 DUSP6 Krithika Murali changed review comment from: PMID: 23643382 Miraoui et al 2013 - - candidate gene study for genes in the FGFR1 pathway that may be associated with CHH, either as causative genes or disease modifiers. A cohort of 386 CHH individuals and 155 unaffected controls of European descent. A number of affected individuals included in this cohort already had known causative variants in CHH-associated genes. The coding exons and proximal introns (≥15 bp from splice sites) of FGF17, FGF18, IL17RD, DUSP6, SPRY2, SPRY4, and FLRT3 were amplified by PCR and determined by direct sequencing.

Summary of DUSP6 variants identified in this study
c.229 T>A p.(Phe77Ile) - absent gnomAD v2 and v3
c.545C>T p.(Ser182Phe) - 203 hets gnomad v2, 137 hets and 1 hom - v3 - identified in conjunction with FGFR1 variant in this individual
c.566A>G p.Asn189Ser - v2 57 hets, v3 29 hets (another individual identified with this variant and an SPRY4 variant)
c.1037C>T p.Thr346Met - 81 hets v2, 27 hets and 1 hom v3 (identified in conjunction with SPRY4 variant

No segregation information provided.

PMID: 23643382 - Dusp6 null mouse model reportedly has craniofacial defects and hearing defects, but no mention of hypogonadotropic hypogonadism. In 5 unrelated individuals with congenital hypogonadotropic hypogonadism 4 heterozygous missense were identified. In 3 of the probands, the DUSP6 mutation was accompanied by a heterozygous missense mutation in another HH-associated gene. 3 of the 4 variants have subpopulation allele frequencies in gnomAD v2.1 that are higher than expected for a dominant condition: p.Thr346Met (AJ AF 0.002797), p.Ser182Phe (NFE AF 0.001396), p.Asn189Ser (NFE AF 0.0003641). No functional assays were conducted.

PMID: 32389901 - 6 unrelated male Chinese Kallman syndrome cases with 4 DUSP6 missense variants. 2 of 4 variants have East Asian allele frequencies in gnomAD v2.1 that are higher than expected for a dominant condition: p.Pro188Leu (EAS AF 0.001203), p.Arg83Gln (EAS AF 0.001129). No functional assays conducted.; to: PMID: 23643382 Miraoui et al 2013 - - candidate gene study for genes in the FGFR1 pathway that may be associated with CHH, either as causative genes or disease modifiers. A cohort of 386 CHH individuals and 155 unaffected controls of European descent. A number of affected individuals included in this cohort already had known causative variants in CHH-associated genes. The coding exons and proximal introns (≥15 bp from splice sites) of FGF17, FGF18, IL17RD, DUSP6, SPRY2, SPRY4, and FLRT3 were amplified by PCR and determined by direct sequencing.

Summary of DUSP6 variants identified in this study
c.229 T>A p.(Phe77Ile) - absent gnomAD v2 and v3
c.545C>T p.(Ser182Phe) - 203 hets gnomad v2, 137 hets and 1 hom - v3 - identified in conjunction with FGFR1 variant in this individual
c.566A>G p.Asn189Ser - v2 57 hets, v3 29 hets (another individual identified with this variant and an SPRY4 variant)
c.1037C>T p.Thr346Met - 81 hets v2, 27 hets and 1 hom v3 (identified in conjunction with SPRY4 variant

No segregation information provided. Dusp6 null mouse model reportedly has craniofacial defects and hearing defects, but no mention of hypogonadotropic hypogonadism.

PMID: 32389901 - 6 unrelated male Chinese Kallman syndrome cases with 4 DUSP6 missense variants. 2 of 4 variants have East Asian allele frequencies in gnomAD v2.1 that are higher than expected for a dominant condition: p.Pro188Leu (EAS AF 0.001203), p.Arg83Gln (EAS AF 0.001129). No functional assays conducted.
Mendeliome v0.13683 DUSP6 Krithika Murali changed review comment from: 1 study cited by OMIM (Miraoui et al 2013) - heterozygous variants in 5 unrelated individuals with congenital hypogonadotrophic hypogonadism (CHH). 4/5 variants highly prevalent in healthy population and/or in conjunction with variants in other genes either known to be associated with CHH or possibly associated. No additional studies published since this paper.

PMID: 23643382 Miraoui et al 2013 - - candidate gene study for genes in the FGFR1 pathway that may be associated with CHH, either as causative genes or disease modifiers. A cohort of 386 CHH individuals and 155 unaffected controls of European descent. A number of affected individuals included in this cohort already had known causative variants in CHH-associated genes. The coding exons and proximal introns (≥15 bp from splice sites) of FGF17, FGF18, IL17RD, DUSP6, SPRY2, SPRY4, and FLRT3 were amplified by PCR and determined by direct sequencing.

Summary of DUSP6 variants identified in this study
c.229 T>A p.(Phe77Ile) - absent gnomAD v2 and v3
c.545C>T p.(Ser182Phe) - 203 hets gnomad v2, 137 hets and 1 hom - v3 - identified in conjunction with FGFR1 variant in this individual
c.566A>G p.Asn189Ser - v2 57 hets, v3 29 hets (another individual identified with this variant and an SPRY4 variant)
c.1037C>T p.Thr346Met - 81 hets v2, 27 hets and 1 hom v3 (identified in conjunction with SPRY4 variant

No segregation information provided.; to: PMID: 23643382 Miraoui et al 2013 - - candidate gene study for genes in the FGFR1 pathway that may be associated with CHH, either as causative genes or disease modifiers. A cohort of 386 CHH individuals and 155 unaffected controls of European descent. A number of affected individuals included in this cohort already had known causative variants in CHH-associated genes. The coding exons and proximal introns (≥15 bp from splice sites) of FGF17, FGF18, IL17RD, DUSP6, SPRY2, SPRY4, and FLRT3 were amplified by PCR and determined by direct sequencing.

Summary of DUSP6 variants identified in this study
c.229 T>A p.(Phe77Ile) - absent gnomAD v2 and v3
c.545C>T p.(Ser182Phe) - 203 hets gnomad v2, 137 hets and 1 hom - v3 - identified in conjunction with FGFR1 variant in this individual
c.566A>G p.Asn189Ser - v2 57 hets, v3 29 hets (another individual identified with this variant and an SPRY4 variant)
c.1037C>T p.Thr346Met - 81 hets v2, 27 hets and 1 hom v3 (identified in conjunction with SPRY4 variant

No segregation information provided.

PMID: 23643382 - Dusp6 null mouse model reportedly has craniofacial defects and hearing defects, but no mention of hypogonadotropic hypogonadism. In 5 unrelated individuals with congenital hypogonadotropic hypogonadism 4 heterozygous missense were identified. In 3 of the probands, the DUSP6 mutation was accompanied by a heterozygous missense mutation in another HH-associated gene. 3 of the 4 variants have subpopulation allele frequencies in gnomAD v2.1 that are higher than expected for a dominant condition: p.Thr346Met (AJ AF 0.002797), p.Ser182Phe (NFE AF 0.001396), p.Asn189Ser (NFE AF 0.0003641). No functional assays were conducted.

PMID: 32389901 - 6 unrelated male Chinese Kallman syndrome cases with 4 DUSP6 missense variants. 2 of 4 variants have East Asian allele frequencies in gnomAD v2.1 that are higher than expected for a dominant condition: p.Pro188Leu (EAS AF 0.001203), p.Arg83Gln (EAS AF 0.001129). No functional assays conducted.
Mendeliome v0.10953 FGF17 Ain Roesley changed review comment from: 31200363;
1x individual

31748124
3x unrelated individuals. 1 has p.48_52del and another variant in OTUD4 (no current mendelian disease association), 1x with Pro120Leu (5 hets in gnomAD) and 1x with Lys191Arg (55 hets in gnomad)

23643382
3x unrelated individuals, including 1 large consanguineous 10-generation French Canadian family.
In this large family, 3 other variants in FGFR1, HS6ST1, and FLRT3 were identified. None of the other affecteds carried the FGF17 variant

Summary: 3x individuals with convincing evidence; to: PMID:31200363;
1x individual

PMID:31748124
3x unrelated individuals. 1 has p.48_52del and another variant in OTUD4 (no current mendelian disease association), 1x with Pro120Leu (5 hets in gnomAD) and 1x with Lys191Arg (55 hets in gnomad)

PMID:23643382
3x unrelated individuals, including 1 large consanguineous 10-generation French Canadian family.
In this large family, 3 other variants in FGFR1, HS6ST1, and FLRT3 were identified. None of the other affecteds carried the FGF17 variant

Summary: 3x individuals with convincing evidence
Mendeliome v0.5369 FGFR1 Zornitza Stark Marked gene: FGFR1 as ready
Mendeliome v0.5369 FGFR1 Zornitza Stark Gene: fgfr1 has been classified as Green List (High Evidence).
Mendeliome v0.5369 FGFR1 Zornitza Stark Tag somatic tag was added to gene: FGFR1.
Mendeliome v0.5369 FGFR1 Zornitza Stark Phenotypes for gene: FGFR1 were changed from to Encephalocraniocutaneous lipomatosis, somatic mosaic 613001; Hartsfield syndrome 615465; Hypogonadotropic hypogonadism 2 with or without anosmia 147950; Jackson-Weiss syndrome 123150; Osteoglophonic dysplasia 166250; Pfeiffer syndrome 101600; Trigonocephaly 1 190440
Mendeliome v0.5368 FGFR1 Zornitza Stark Publications for gene: FGFR1 were set to
Mendeliome v0.5367 FGFR1 Zornitza Stark Mode of pathogenicity for gene: FGFR1 was changed from to Other
Mendeliome v0.5366 FGFR1 Zornitza Stark Mode of inheritance for gene: FGFR1 was changed from Unknown to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.5357 FGFR1 Elena Savva reviewed gene: FGFR1: Rating: GREEN; Mode of pathogenicity: Other; Publications: PMID: 18034870, 23812909, 26942290; Phenotypes: Encephalocraniocutaneous lipomatosis, somatic mosaic 613001, Hartsfield syndrome 615465, Hypogonadotropic hypogonadism 2 with or without anosmia 147950, Jackson-Weiss syndrome 123150, Osteoglophonic dysplasia 166250, Pfeiffer syndrome 101600, Trigonocephaly 1 190440; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal; Current diagnostic: yes
Mendeliome v0.2771 KLB Zornitza Stark gene: KLB was added
gene: KLB was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: KLB was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: KLB were set to 28754744
Review for gene: KLB was set to GREEN
Added comment: Seven heterozygous loss‐of‐function KLB mutations in 13 individuals reported. In mice, lack of Klb led to delayed puberty, altered estrous cyclicity, and subfertility due to a hypothalamic defect associated with inability of GnRH neurons to release GnRH in response to FGF21.
Functional analysis showed decreased activity in response to FGF21 and FGF8.
KLB is an obligate coreceptor for FGF21 alongside FGFR1.
Sources: Literature
Mendeliome v0.0 FGFR1 Zornitza Stark gene: FGFR1 was added
gene: FGFR1 was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: FGFR1 was set to Unknown