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[Single-nucleotide polymorphisms of MAMLD1 and hypospadias in Chinese]
Li-Kai Zhuang1, Qi-Hua Fu, Jian Wang
1Department of Urology, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China.
Insights
Genetic analysis of the MAMLD1 gene in Chinese children found no significant association with hypospadias. This study suggests MAMLD1 is not a primary cause of hypospadias in this population.
Area of Science:
- Genetics
- Pediatrics
- Urology
Background:
- Hypospadias is a common congenital condition affecting the male urethra.
- Genetic factors are implicated in hypospadias pathogenesis, but specific genes require population-specific investigation.
- The MAMLD1 gene has been previously studied in relation to hypospadias.
Purpose of the Study:
- To investigate the role of MAMLD1 gene mutations in hypospadias development within the Chinese population.
- To identify potential genetic associations between MAMLD1 single-nucleotide polymorphisms and hypospadias.
- To assess the utility of MAMLD1 as a candidate gene for hypospadias in this demographic.
Main Methods:
- DNA sequencing of MAMLD1 single-nucleotide polymorphisms was performed.
- Peripheral venous blood samples were collected from 150 Chinese children with hypospadias and 120 healthy controls.
- Comparative analysis was conducted between case and control groups.
Main Results:
- A known polymorphism (p.N589S) and a novel polymorphism (p.N567S) in MAMLD1 were identified.
- No statistically significant differences in the frequency of these polymorphisms were observed between hypospadias patients and controls (P > 0.05).
- The identified MAMLD1 polymorphisms showed no clear correlation with hypospadias in the study cohort.
Conclusions:
- MAMLD1 single-nucleotide polymorphisms are not significantly associated with hypospadias in the Chinese population.
- MAMLD1 is unlikely to be a major candidate gene contributing to hypospadias pathogenesis in this demographic.
- Replication studies are crucial for validating genetic associations and understanding population-specific genetic influences.
Objective:
To investigate the role of the MAMLD1 gene mutation in the pathogenesis of hypospadias in the Chinese population.
Methods:
We collected peripheral venous blood from 150 Chinese children with hypospadias (the case group) and another 120 normal healthy ones (the control group), aged 0.5 to 6 years. We obtained their DNA samples and performed DNA sequencing on the single-nucleotide polymorphisms of MAMLD1, followed by comparative analysis.
Results:
A known missense mutation polymorphism p. N589S was identified in 12 (8.0%) of the hypospadias patients and 4 (3.0%) of the normal controls, and a novel missense mutation polymorphism p. N567S was identified in 4 (2.7%) of the patients and 3 (2.5%) of the controls, neither with statistically significant differences between the two groups (P > 0.05).
Conclusion:
The results re-emphasized the importance of replication in genetic association approaches, and might reveal a real difference in susceptibility genes among different populations. The single-nucleotide polymorphisms of MAMLD1 bear no obvious correlation with hypospadias, and MAMLD1 is not a candidate gene in its pathogenesis in the Chinese population.
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