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Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
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Translation01:31

Translation

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.
Translation Produces the Building Blocks of Life
Translation01:31

Translation

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.
Translation Produces the Building Blocks of Life

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Related Experiment Video

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High-resolution Melting PCR for Complement Receptor 1 Length Polymorphism Genotyping: An Innovative Tool for Alzheimer's Disease Gene Susceptibility Assessment
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MTHFR 677C>T polymorphism and cluster headache.

Markus Schürks1, Franziska A Neumann, Christof Kessler

  • 1Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02215-1204, USA.

Headache
|October 16, 2010
PubMed
Summary
This summary is machine-generated.

The methylenetetrahydrofolate reductase (MTHFR) 677C>T polymorphism is not associated with cluster headache overall. However, the MTHFR 677T allele may increase the risk for chronic cluster headache.

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Area of Science:

  • Genetics
  • Neurology
  • Epidemiology

Background:

  • The methylenetetrahydrofolate reductase (MTHFR) gene's 677C>T polymorphism (rs1801133) is a potential factor in cluster headache development.
  • Previous research has not investigated this specific genetic association.

Purpose of the Study:

  • To examine the relationship between the MTHFR 677C>T polymorphism and cluster headache in Caucasian individuals.
  • To determine if specific genotypes of this MTHFR polymorphism are more prevalent in cluster headache patients.

Main Methods:

  • A case-control study was conducted involving 147 cluster headache patients and 599 matched controls.
  • Genotyping for the MTHFR 677C>T polymorphism was performed using restriction fragment length polymorphism analysis.
  • Logistic regression models (additive, dominant, recessive) were employed to assess the association, with significance set at a Bonferroni-corrected P < .004.

Main Results:

  • No significant difference in MTHFR 677C>T genotype or allele distribution was found between cluster headache patients and controls.
  • Logistic regression analyses did not reveal an overall association between the MTHFR polymorphism and cluster headache.
  • Subgroup analysis indicated a potential increased risk for chronic cluster headache among carriers of the MTHFR 677T allele (OR = 2.82, P = .03).

Conclusions:

  • The MTHFR 677C>T polymorphism does not appear to be associated with cluster headache in the studied Caucasian population.
  • Preliminary findings suggest a possible link between the MTHFR 677T allele and an elevated risk of chronic cluster headache.
  • Further independent studies are warranted to confirm these hypothesis-generating results regarding chronic cluster headache.