Human MAMLD1 Gene Variations Seem Not Sufficient to Explain a 46,XY DSD Phenotype

被引：20

作者：

Camats, Nuria ^{[1
]}

Fernandez-Cancio, Monica ^{[2
]}

Audi, Laura ^{[2
]}

Mullis, Primus E. ^{[1
]}

Moreno, Francisca ^{[3
]}

Gonzalez Casado, Isabel ^{[4
]}

Pedro Lopez-Siguero, Juan ^{[5
]}

Corripio, Raquel ^{[6
]}

Bermudez de la Vega, Jose Antonio ^{[7
]}

Antonio Blanco, Jose ^{[8
]}

Flueck, Christa E. ^{[1
]}

机构：

[1] Univ Childrens Hosp Bern, Dept Clin Res, Pediat Endocrinol & Diabetol, Bern, Switzerland

[2] Univ Autonoma Barcelona, Pediat Endocrinol Res Unit, Vall dHebron Inst Recerca,Hosp Univ Vall dHebron, CIBERER Ctr Biomed Res Rare Dis,Inst Salud Carlos, E-08193 Barcelona, Spain

[3] Hosp Infantil La Fe, Pediat Endocrinol, Valencia, Spain

[4] Hosp Univ La Paz, Pediat Endocrinol, Madrid, Spain

[5] Hosp Materno Infantil, Pediat Endocrinol, Malaga, Spain

[6] Hosp Sabadell, Pediat Endocrinol, Sabadell, Spain

[7] Hosp Univ Virgen Macarena, Pediat Endocrinol, Seville, Spain

[8] Hosp Badalona Germans Trias & Pujol, Pediat Urol, Badalona, Spain

来源：

PLOS ONE | 2015年 / 10卷 / 11期

基金：

瑞士国家科学基金会;

关键词：

SEX DEVELOPMENT; MYOTUBULAR MYOPATHY; MALE HYPOGENITALISM; MUTATIONS; HYPOSPADIAS; DISORDER; XQ28; CXORF6; MTM1; POLYMORPHISMS;

D O I：

10.1371/journal.pone.0142831

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

MAMLD1 is thought to cause disordered sex development in 46, XY patients. But its role is controversial because some MAMLD1 variants are also detected in normal individuals, several MAMLD1 mutations have wild-type activity in functional tests, and the male Mamld1-knockout mouse has normal genitalia and reproduction. Our aim was to search for MAMLD1 variations in 108 46, XY patients with disordered sex development, and to test them functionally. We detected MAMDL1 variations and compared SNP frequencies in controls and patients. We tested MAMLD1 transcriptional activity on promoters involved in sex development and assessed the effect of MAMLD1 on androgen production. MAMLD1 expression in normal steroid-producing tissues and mutant MAMLD1 protein expression were also assessed. Nine MAMLD1 mutations (7 novel) were characterized. In vitro, most MAMLD1 variants acted similarly to wild type. Only the L210X mutation showed loss of function in all tests. We detected no effect of wild-type or MAMLD1 variants on CYP17A1 enzyme activity in our cell experiments, and Western blots revealed no significant differences for MAMLD1 protein expression. MAMLD1 was expressed in human adult testes and adrenals. In conclusion, our data support the notion that MAMLD1 sequence variations may not suffice to explain the phenotype in carriers and that MAMLD1 may also have a role in adult life.

引用

页数：20

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