Related Experiment Videos
Parental imprinting and human disease
1Howard Hughes Medical Institute, Genetics Division, Children's Hospital, Boston, Massachusetts, USA. lalande@rascal.med.harvard.edu
Annual Review of Genetics
|January 1, 1996
Summary
Parental imprinting, a key developmental process, regulates gene expression. Its disruption causes genetic disorders like Prader-Willi and Angelman syndromes, highlighting the need to study imprinting
Area of Science:
- Genetics
- Developmental Biology
- Epigenetics
Background:
- Parental imprinting involves allele-specific differences in transcription, DNA methylation, and replication timing.
- Imprinting is crucial for normal development, and its dysregulation is linked to specific diseases.
- Aberrant imprinting contributes to genetic disorders and cancers.
Purpose of the Study:
- To explore the molecular basis of abnormal imprinting in human diseases.
- To understand the role of imprinting in development and disease pathogenesis.
- To identify and characterize novel imprinted human disease loci.
Main Methods:
- Analysis of allele-specific DNA methylation patterns.
- Investigation of transcription differences between parental alleles.
- Examination of DNA replication timing in imprinted regions.
Main Results:
- Absence of paternal contribution to chromosome 15q11-q13 causes Prader-Willi syndrome.
- Absence of a maternal copy of chromosome 15q11-q13 causes Angelman syndrome.
- Beckwith-Wiedemann syndrome is linked to abnormal inheritance of chromosome 11p15, with loss of imprinting in cancers like Wilms' tumor.
Conclusions:
- Studying molecular imprinting defects is vital for understanding genetic disorders.
- Imprinting abnormalities are implicated in a range of human diseases.
- Further research into imprinting will aid in discovering new disease-associated genes and loci.