What does this research mean for the field?

There is no evidence of genetic linkage between the angiotensinogen (AGT) locus and essential hypertension, failing to replicate earlier reports from smaller studies. Novelty: ClaimNovelty.CONTRADICTORY. Consensus alignment: ConsensusAlignment.CHALLENGES_CONSENSUS.

What question did this study set out to answer?

To determine whether genetic linkage exists between the human angiotensinogen (AGT) gene locus and essential hypertension in a large European cohort.

March 1, 1998HypertensionOpen Access

Evaluation of the Angiotensinogen Locus in Human Essential Hypertension

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Why the study?

Is the angiotensinogen (AGT) locus linked to essential hypertension in affected sibling pairs?

Population

350 European families, comprising 630 affected sibling pairs with essential hypertension

Design

Other

Authors

EBEva BrandUniversity Hospital Münster NCNathalie ChatelainSt Bartholomew's Hospital BKBernard KeavneyAdult Congenital Heart Disease

Discussion

Member takes

Implication

No AGT linkage to hypertension in large families; challenges prior associations yet leaves replication across populations open.

Key Points

To determine whether genetic linkage exists between the human angiotensinogen (AGT) gene locus and essential hypertension in a large European cohort.
Conducted a multicenter collaborative study across nine European centers enrolling 350 families with 630 affected sibling pairs.
Genotyped a highly polymorphic dinucleotide repeat in the 3'-flanking region of the AGT gene and evaluated linkage using two statistical methods across the whole panel and in subsets stratified by early onset and disease severity.
Statistical linkage analysis demonstrated no evidence of linkage to the AGT locus in the total cohort or within family subsets selected for severe or early-onset hypertension.
The findings failed to replicate earlier linkage reports from smaller cohorts, demonstrating an absence of detectable linkage in this large sibling-pair resource.

Structured PICO

Is the angiotensinogen (AGT) locus linked to essential hypertension in affected sibling pairs?

Population

350 European families, comprising 630 affected sibling pairs with essential hypertension

Intervention

Genetic linkage analysis of the angiotensinogen (AGT) locus using a highly polymorphic dinucleotide repeat in the 3'-flanking region

Outcome

Evidence for genetic linkage at the AGT locus with essential hypertensionsurrogate

A large European family study found no evidence of genetic linkage between the angiotensinogen locus and essential hypertension, failing to replicate earlier smaller studies.

Cite This Study

Brand et al. (1998) studied this question.

synapsesocial.com/papers/6a1b3665ca4fb370f6e58596 https://doi.org/10.1161/01.hyp.31.3.725

Topics

Hypertension management

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Evaluation of the Angiotensinogen Locus in Human Essential Hypertension

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Evaluation of the Angiotensinogen Locus in Human Essential Hypertension

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Topics

Also Consider