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Inborn Errors of Metabolism01:20

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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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In the case of systematic errors, the sources can be identified, and the errors can be subsequently minimized by addressing these sources. According to the source, systematic errors can be divided into sampling, instrumental, methodological, and personal errors.
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According to some social psychologists, people tend to overemphasize internal factors as explanations—or attributions—for the behavior of other people. They tend to assume that the behavior of another person is a trait of that person, and to underestimate the power of the situation on the behavior of others. They tend to fail to recognize when the behavior of another is due to situational variables, and thus to the person’s state. This erroneous assumption is...
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Random or indeterminate errors originate from various uncontrollable variables, such as variations in environmental conditions, instrument imperfections, or the inherent variability of the phenomena being measured. Usually, these errors cannot be predicted, estimated, or characterized because their direction and magnitude often vary in magnitude and direction even during consecutive measurements. As a result, they are difficult to eliminate. However, the aggregate effect of these errors can be...
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The margin of error is also called the maximum error of an estimate. The margin of error is the maximum possible or expected difference between the observed sample parameter value and the actual population parameter value. For proportion, it is the maximum difference between the value of sample proportion obtained from the data and the true value of population proportion. As the true value of the population parameter is not known, the margin of error is calculated using the sample statistic.
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The sampling variability of a statistic is defined as how much the statistic varies from one sample to another. The sampling variability of a statistic is typically measured by measuring its standard error.
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PXE, a Mysterious Inborn Error Clarified.

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  • 1Division of Oncogenetics, The Netherlands Cancer Institute, 1066CX Amsterdam, The Netherlands.

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|November 18, 2018
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This summary is machine-generated.

Pseudoxanthoma elasticum (PXE) is a metabolic disorder causing abnormal calcification. Recent discoveries reveal its underlying biochemical mechanism, offering hope for new treatment strategies for this previously untreatable condition.

Keywords:
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Area of Science:

  • Biochemistry
  • Genetics
  • Dermatology
  • Metabolic Diseases

Background:

  • Inborn errors of metabolism have been studied since 1901.
  • Pseudoxanthoma elasticum (PXE) is a relatively frequent inherited disorder characterized by aberrant calcification.
  • Despite extensive research, the molecular cause of PXE remained elusive until recently.

Purpose of the Study:

  • To review the historical and biochemical journey toward understanding the molecular basis of PXE.
  • To discuss the newly identified biochemical mechanism underlying PXE.
  • To explore potential novel therapeutic strategies for PXE based on this understanding.

Main Methods:

  • Literature review of historical and recent research on PXE.
  • Biochemical analysis of the identified PXE mechanism.
  • Discussion of implications for PXE treatment.

Main Results:

  • The molecular cause of PXE was identified in 2013.
  • The identified mechanism involves aberrant calcification.
  • This discovery opens avenues for developing new treatments for PXE.

Conclusions:

  • The biochemical understanding of PXE has significantly advanced.
  • New therapeutic approaches for PXE are emerging.
  • Ongoing research and discussion are crucial to resolve remaining controversies in the field.