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Related Concept Videos

Translation01:31

Translation

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Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
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[Rickets-like genetic diseases].

Hong-Wei Ma1

  • 1Department of Developmental Pediatrics, Shengjing Hospital, China Medical University, Shenyang 110004, China. mahongwei1960@163.com.

Zhongguo Dang Dai Er Ke Za Zhi = Chinese Journal of Contemporary Pediatrics
|November 16, 2013
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Summary
This summary is machine-generated.

This review covers genetic rickets-like diseases, including X-linked hypophosphatemic rickets and hypophosphatasia. Early diagnosis and specific treatments are crucial for managing these rare pediatric bone disorders.

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Area of Science:

  • Pediatric Endocrinology
  • Medical Genetics
  • Skeletal Dysplasias

Context:

  • Rickets-like symptoms, such as bow legs and delayed fontanelle closure, prompt pediatric consultations.
  • Genetic disorders mimicking nutritional rickets present diagnostic challenges.
  • Understanding the genetic basis of these conditions is essential for accurate diagnosis.

Purpose:

  • To summarize clinical features, genetic causes, and treatment strategies for various rickets-like genetic diseases.
  • To differentiate these conditions from nutritional vitamin D deficiency rickets.
  • To highlight key diagnostic markers and genetic testing for each disorder.

Summary:

  • X-linked hypophosphatemic rickets (XLH) presents with hypophosphatemia and is treated with phosphate and active vitamin D. Hypophosphatasia involves low alkaline phosphatase due to TNSALP gene mutations. Achondroplasia, characterized by dwarfism, is diagnosed via X-ray and FGFR3 testing. Vitamin D-dependent rickets requires active vitamin D supplementation. Pycnodysostosis involves skeletal and dental issues linked to TSK gene mutations. Ectodermal dysplasia, associated with hair loss, relates to EDA/EDAR/WNT10A genes.
  • Clinical manifestations, genetic etiologies (XLH, hypophosphatasia, achondroplasia, vitamin D-dependent rickets, pycnodysostosis, ectodermal dysplasia), and therapeutic approaches are detailed.
  • Diagnostic criteria include biochemical markers (serum phosphorus, alkaline phosphatase), imaging (X-ray), and genetic testing (FGFR3, TSK, EDA/EDAR/WNT10A).

Impact:

  • Provides a consolidated resource for clinicians diagnosing and managing rare pediatric bone disorders.
  • Facilitates differential diagnosis by outlining distinct features of genetic rickets-like conditions.
  • Emphasizes the importance of genetic analysis in guiding targeted therapies and improving patient outcomes.