cryptorchidism/tyrosine

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Analysis of POU5F1, c-Kit, PLAP, AP2γ and SALL4 in gonocytes of patients with cryptorchidism.

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Cryptorchidism is a risk factor for the development of testicular germ cell tumors (TGCTs). The most common type of TGCT in cryptorchidism is seminoma. The intratubular germ cell neoplasia unclassified (ITGCNU) is a histological pattern preceding the development of seminomas and non-seminomas. It

Mutations in PTPN11, encoding the protein tyrosine phosphatase SHP-2, cause Noonan syndrome.

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Noonan syndrome (MIM 163950) is an autosomal dominant disorder characterized by dysmorphic facial features, proportionate short stature and heart disease (most commonly pulmonic stenosis and hypertrophic cardiomyopathy). Webbed neck, chest deformity, cryptorchidism, mental retardation and bleeding

Mutations in fibroblast growth factor receptor 1 cause Kallmann syndrome with a wide spectrum of reproductive phenotypes.

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BACKGROUND Kallmann's syndrome (KS) is a clinically and genetically heterogeneous disorder consisting of idiopathic hypogonadotropic hypogonadism (IHH) and anosmia. Mutations in KAL1 causing the X-linked form of KS have been identified in 10% of all KS patients and consistently result in a severe

Genetic testing facilitates prepubertal diagnosis of congenital hypogonadotropic hypogonadism.

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Neonatal micropenis and cryptorchidism raise the suspicion of congenital hypogonadotropic hypogonadism (CHH), a rare genetic disorder caused by gonadotropin-releasing hormone deficiency. Low plasma testosterone levels and low gonadotropins during minipuberty provide a clinical diagnostic clue, yet

Traditional and targeted exome sequencing reveals common, rare and novel functional deleterious variants in RET-signaling complex in a cohort of living US patients with urinary tract malformations.

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Signaling by the glial cell line-derived neurotrophic factor (GDNF)-RET receptor tyrosine kinase and SPRY1, a RET repressor, is essential for early urinary tract development. Individual or a combination of GDNF, RET and SPRY1 mutant alleles in mice cause renal malformations reminiscent of congenital

Idiopathic hypogonadotropic hypogonadism in a mother and her monozygotic twins born after a single embryo transfer.

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OBJECTIVE To describe a mother with idiopathic hypogonadotropic hypogonadism (IHH) and her monozygotic (MZ) twin boys who all have the same heterozygous fibroblast growth factor receptor-1 (FGFR1) gene mutation. METHODS Case report. METHODS University hospital. METHODS A 28-year-old mother with

Maternal administration of flutamide during late gestation affects the brain and reproductive organs development in the rat male offspring.

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We have previously demonstrated that male rats exposed to stress during the last week of gestation present age-specific impairments of brain development. Since the organization of the fetal developing brain is subject to androgen exposure and prenatal stress was reported to disrupt perinatal

The role of somatropin therapy in children with Noonan syndrome.

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Patients with Noonan syndrome, which is thought to have an incidence of 1 : 1,000 to 1 : 2,500 live births, have variable hypogonadism together with features such as pulmonary valvular stenosis, dysmorphism, deafness, visual problems, cryptorchidism, clotting disorders, and short stature. Noonan

Hormonal regulation of male reproductive tract development.

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We have employed gene knockout technology in mice to probe gene function in various stages of mouse male sexual differentiation. Insulin-like factor (Insl3) is prominently expressed in Leydig cells. Mutation of this gene leads to fully penetrant cryptorchidism. Single mutation in each of the three

[SOS1 mutation: a new cause of Noonan syndrome].

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Noonan syndrome, characterized by short stature, facial anomalies, heart disease and cryptorchidism in males, is an autosomal dominant, genetically heterogeneous disease. Approximately 50 % of Noonan syndrome cases are caused by gain-of-function mutations in PTPN11, encoding the tyrosine phosphatase

PTPN11 mutations are associated with mild growth hormone resistance in individuals with Noonan syndrome.

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BACKGROUND Noonan syndrome is frequently associated with an unclear disturbance of GH secretion. Half the individuals with Noonan syndrome carry a heterozygous mutation of the nonreceptor-type protein tyrosine phosphatase, Src homology region 2-domain phosphatase-2 (SHP-2), encoded by PTPN11, which

Murine model indicates 22q11.2 signaling adaptor CRKL is a dosage-sensitive regulator of genitourinary development.

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The spectrum of congenital anomalies affecting either the upper tract (kidneys and ureters) or lower tract (reproductive organs) of the genitourinary (GU) system are fundamentally linked by the developmental origin of multiple GU tissues, including the kidneys, gonads, and reproductive ductal

Noonan syndrome.

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Noonan Syndrome (NS) is characterised by short stature, typical facial dysmorphology and congenital heart defects. The incidence of NS is estimated to be between 1:1000 and 1:2500 live births. The main facial features of NS are hypertelorism with down-slanting palpebral fissures, ptosis and low-set

PTPN11 mutations in Noonan syndrome: molecular spectrum, genotype-phenotype correlation, and phenotypic heterogeneity.

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Noonan syndrome (NS) is a developmental disorder characterized by facial dysmorphia, short stature, cardiac defects, and skeletal malformations. We recently demonstrated that mutations in PTPN11, the gene encoding the non-receptor-type protein tyrosine phosphatase SHP-2 (src homology region 2-domain

Neuroendocrine marker substances in human Leydig cells--changes by disturbances of testicular function.

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A number of neuroendocrine and neuronal markers were demonstrated in Leydig cells of the testes of 18 men aged between 20 and 81 years. Tissue sections were divided into five groups, i.e. carcinoma of the prostate (control cases; n = 4), seminoma (n = 8), anti-androgen therapy (n = 3), oestradiol

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