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Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
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Prader Willi syndrome: advances in genetics.

Suhani Hingar1, Marc Schneeberger Pané2, María José Ortuño Romero3

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Prader-Willi syndrome (PWS) is a genetic disorder affecting chromosome 15, causing developmental, behavioral, and physical issues. Early diagnosis and multidisciplinary care are crucial for managing PWS symptoms and improving quality of life.

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Area of Science:

  • Genetics
  • Endocrinology
  • Developmental Pediatrics

Background:

  • Prader-Willi syndrome (PWS) is a complex genetic disorder linked to chromosome 15q11.2-q13.
  • It presents with a spectrum of physical, cognitive, and behavioral features that change throughout life.
  • Key infant symptoms include hypotonia and feeding issues, evolving into hyperphagia, obesity, and intellectual disabilities.

Purpose of the Study:

  • To provide a comprehensive overview of Prader-Willi syndrome.
  • To detail its clinical features, natural history, and molecular basis.
  • To highlight the importance of early diagnosis and integrated care.

Main Methods:

  • Review of clinical features and natural history of PWS.
  • Analysis of genetic underpinnings, including imprinted genes like SNORD116.
  • Exploration of emerging research on targeted pathways for treatment.

Main Results:

  • PWS is characterized by distinct developmental trajectories and endocrine abnormalities.
  • Genetic abnormalities on chromosome 15, particularly involving imprinted genes, are the primary cause.
  • Research into pathways like oxytocin and ghrelin signaling shows potential for novel therapeutic strategies.

Conclusions:

  • Early diagnosis and multidisciplinary management are essential for optimizing outcomes in PWS.
  • Understanding the molecular basis of PWS aids in developing targeted treatments.
  • Precision medicine approaches are key to enhancing the quality of life for individuals with PWS.