Role of TBX1 in human del22q11.2 syndrome

Hisato Yagi, Yoshiyuki Furutani, Hiromichi Hamada, Takashi Sasaki, Shuichi Asakawa, Shinsei Minoshima, Fukiko Ichida, Kunitaka Joo, Misa Kimura, Shin ichiro Imamura, Naoyuki Kamatani, Kazuo Momma, Atsuyoshi Takao, Makoto Nakazawa, Nobuyoshi Shimizu, Rumiko Matsuoka

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Abstract

Background: Del22q11.2 syndrome is the most frequent known chromosomal microdeletion syndrome, with an incidence of 1 in 4000-5000 livebirths. It is characterised by a 3-Mb deletion on chromosome 22q11.2, cardiac abnormalities, T-cell deficits, cleft palate facial anomalies, and hypocalcaemia. At least 30 genes have been mapped to the deleted region. However, the association of these genes with the cause of this syndrome is not clearly understood. Methods: To test for the chromosomal deletion at 22q11.2, we did fluorescence in-situ hybridisation analysis with ten probes on 22q11.2 in 235 unrelated patients with clinically diagnosed del22q11.2 syndrome. To investigate mutations in the coding sequence of TBX1, we also did genetic analysis in 13 patients from ten families who have the 22q11.2 syndrome phenotype but no detectable deletion of 22q11.2. Findings: 96% (225 of 235) of patients had a defined 1·5-3-Mb deletion at 22q11.2. We identified three mutations of TBX1 in two unrelated patients without the 22q11.2 deletion - one with sporadic conotruncal anomaly face syndrome/velocardiofacial syndrome and one with sporadic DiGeorge's syndrome - and in three patients from a family with conotruncal anomaly face syndrome/velocardiofacial syndrome. We did not record these three mutations in 555 healthy controls (1110 chromosomes; p<0·0001). Interpretation: Our results suggest that the TBX1 mutation is responsible for five major phenotypes in del22q11.2 syndrome. Therefore, we conclude that TBX1 is a major genetic determinant of the del22q11.2 syndrome.

Original languageEnglish
Pages (from-to)1366-1373
Number of pages8
JournalLancet
Volume362
Issue number9393
DOIs
Publication statusPublished - 2003 Oct 25

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DiGeorge Syndrome
Mutation
Phenotype
Chromosome Deletion
Hypocalcemia
Cleft Palate
Fluorescence In Situ Hybridization
Genes
Chromosomes
T-Lymphocytes
Incidence

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Yagi, H., Furutani, Y., Hamada, H., Sasaki, T., Asakawa, S., Minoshima, S., ... Matsuoka, R. (2003). Role of TBX1 in human del22q11.2 syndrome. Lancet, 362(9393), 1366-1373. https://doi.org/10.1016/S0140-6736(03)14632-6

Role of TBX1 in human del22q11.2 syndrome. / Yagi, Hisato; Furutani, Yoshiyuki; Hamada, Hiromichi; Sasaki, Takashi; Asakawa, Shuichi; Minoshima, Shinsei; Ichida, Fukiko; Joo, Kunitaka; Kimura, Misa; Imamura, Shin ichiro; Kamatani, Naoyuki; Momma, Kazuo; Takao, Atsuyoshi; Nakazawa, Makoto; Shimizu, Nobuyoshi; Matsuoka, Rumiko.

In: Lancet, Vol. 362, No. 9393, 25.10.2003, p. 1366-1373.

Research output: Contribution to journalArticle

Yagi, H, Furutani, Y, Hamada, H, Sasaki, T, Asakawa, S, Minoshima, S, Ichida, F, Joo, K, Kimura, M, Imamura, SI, Kamatani, N, Momma, K, Takao, A, Nakazawa, M, Shimizu, N & Matsuoka, R 2003, 'Role of TBX1 in human del22q11.2 syndrome', Lancet, vol. 362, no. 9393, pp. 1366-1373. https://doi.org/10.1016/S0140-6736(03)14632-6
Yagi H, Furutani Y, Hamada H, Sasaki T, Asakawa S, Minoshima S et al. Role of TBX1 in human del22q11.2 syndrome. Lancet. 2003 Oct 25;362(9393):1366-1373. https://doi.org/10.1016/S0140-6736(03)14632-6
Yagi, Hisato ; Furutani, Yoshiyuki ; Hamada, Hiromichi ; Sasaki, Takashi ; Asakawa, Shuichi ; Minoshima, Shinsei ; Ichida, Fukiko ; Joo, Kunitaka ; Kimura, Misa ; Imamura, Shin ichiro ; Kamatani, Naoyuki ; Momma, Kazuo ; Takao, Atsuyoshi ; Nakazawa, Makoto ; Shimizu, Nobuyoshi ; Matsuoka, Rumiko. / Role of TBX1 in human del22q11.2 syndrome. In: Lancet. 2003 ; Vol. 362, No. 9393. pp. 1366-1373.
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T1 - Role of TBX1 in human del22q11.2 syndrome

AU - Yagi, Hisato

AU - Furutani, Yoshiyuki

AU - Hamada, Hiromichi

AU - Sasaki, Takashi

AU - Asakawa, Shuichi

AU - Minoshima, Shinsei

AU - Ichida, Fukiko

AU - Joo, Kunitaka

AU - Kimura, Misa

AU - Imamura, Shin ichiro

AU - Kamatani, Naoyuki

AU - Momma, Kazuo

AU - Takao, Atsuyoshi

AU - Nakazawa, Makoto

AU - Shimizu, Nobuyoshi

AU - Matsuoka, Rumiko

PY - 2003/10/25

Y1 - 2003/10/25

N2 - Background: Del22q11.2 syndrome is the most frequent known chromosomal microdeletion syndrome, with an incidence of 1 in 4000-5000 livebirths. It is characterised by a 3-Mb deletion on chromosome 22q11.2, cardiac abnormalities, T-cell deficits, cleft palate facial anomalies, and hypocalcaemia. At least 30 genes have been mapped to the deleted region. However, the association of these genes with the cause of this syndrome is not clearly understood. Methods: To test for the chromosomal deletion at 22q11.2, we did fluorescence in-situ hybridisation analysis with ten probes on 22q11.2 in 235 unrelated patients with clinically diagnosed del22q11.2 syndrome. To investigate mutations in the coding sequence of TBX1, we also did genetic analysis in 13 patients from ten families who have the 22q11.2 syndrome phenotype but no detectable deletion of 22q11.2. Findings: 96% (225 of 235) of patients had a defined 1·5-3-Mb deletion at 22q11.2. We identified three mutations of TBX1 in two unrelated patients without the 22q11.2 deletion - one with sporadic conotruncal anomaly face syndrome/velocardiofacial syndrome and one with sporadic DiGeorge's syndrome - and in three patients from a family with conotruncal anomaly face syndrome/velocardiofacial syndrome. We did not record these three mutations in 555 healthy controls (1110 chromosomes; p<0·0001). Interpretation: Our results suggest that the TBX1 mutation is responsible for five major phenotypes in del22q11.2 syndrome. Therefore, we conclude that TBX1 is a major genetic determinant of the del22q11.2 syndrome.

AB - Background: Del22q11.2 syndrome is the most frequent known chromosomal microdeletion syndrome, with an incidence of 1 in 4000-5000 livebirths. It is characterised by a 3-Mb deletion on chromosome 22q11.2, cardiac abnormalities, T-cell deficits, cleft palate facial anomalies, and hypocalcaemia. At least 30 genes have been mapped to the deleted region. However, the association of these genes with the cause of this syndrome is not clearly understood. Methods: To test for the chromosomal deletion at 22q11.2, we did fluorescence in-situ hybridisation analysis with ten probes on 22q11.2 in 235 unrelated patients with clinically diagnosed del22q11.2 syndrome. To investigate mutations in the coding sequence of TBX1, we also did genetic analysis in 13 patients from ten families who have the 22q11.2 syndrome phenotype but no detectable deletion of 22q11.2. Findings: 96% (225 of 235) of patients had a defined 1·5-3-Mb deletion at 22q11.2. We identified three mutations of TBX1 in two unrelated patients without the 22q11.2 deletion - one with sporadic conotruncal anomaly face syndrome/velocardiofacial syndrome and one with sporadic DiGeorge's syndrome - and in three patients from a family with conotruncal anomaly face syndrome/velocardiofacial syndrome. We did not record these three mutations in 555 healthy controls (1110 chromosomes; p<0·0001). Interpretation: Our results suggest that the TBX1 mutation is responsible for five major phenotypes in del22q11.2 syndrome. Therefore, we conclude that TBX1 is a major genetic determinant of the del22q11.2 syndrome.

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