RGD Reference Report - Congenic mapping of a blood pressure QTL region on rat chromosome 10 using the Dahl salt-sensitive rat with introgressed alleles from the Milan normotensive strain. - Rat Genome Database

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Congenic mapping of a blood pressure QTL region on rat chromosome 10 using the Dahl salt-sensitive rat with introgressed alleles from the Milan normotensive strain.

Authors: Saad, Y  Toland, EJ  Yerga-Woolwine, S  Farms, P  Joe, B 
Citation: Saad Y, etal., Mamm Genome. 2008 Jan 4;.
RGD ID: 1643425
Pubmed: PMID:18175179   (View Abstract at PubMed)
DOI: DOI:10.1007/s00335-007-9084-7   (Journal Full-text)

Multiple blood pressure (BP) quantitative trait loci (QTLs) are reported on rat chromosome 10 (RNO10). Of these, QTLs detected by contrasting the genome of the hypertensive Dahl salt-sensitive (S) rat with two different relatively normotensive strains, Lewis (LEW) and the Milan normotensive strain (MNS), are reported. Because the deduced QTL regions of both S vs. LEW and S vs. MNS comparisons are within large genomic segments encompassing more than 2 cM, there was a need to further localize these QTLs and determine whether the QTLs are unique to specific strain comparisons. Previously, the S.MNS QTL1 was mapped to less than 2.6 cM as a differential segment between two congenic strains. In this study, multiple congenic strains spanning the projected interval were studied. The BP effect of each strain was interpreted as the net effect of alleles introgressed within that congenic strain. The results suggest that the MNS alleles within the previously proposed differential segment (D10Rat27-D10Rat24) do not independently lower BP of the S rat. However, another congenic strain, S.MNS(10) x 9, containing introgressed MNS alleles that are outside of the previously proposed differential segment is of interest because (1) it demonstrated a BP-lowering effect, (2) it is contained within a single congenic strain and is not based on the observed effect of a differential segment, and, more importantly, (3) it overlaps with the previously identified S.LEW BP QTL region. Identification of the same QTL affecting BP in multiple rat strains will provide further support for the QTL's involvement and importance in human essential hypertension.



RGD Manual Disease Annotations    Click to see Annotation Detail View
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Bp303RatHypotension  IAGP  RGD 
Bp304RatHypotension  IAGP  RGD 
Bp305RatHypotension  IAGP  RGD 

Phenotype Annotations    Click to see Annotation Detail View

Mammalian Phenotype

Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
SS.MNS-(D10Mco30-D10Got101)/McoRatdecreased body weight inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 
SS.MNS-(D10Mco30-D10Got112)/McoRatdecreased body weight inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 
SS.MNS-(D10Mco30-D10Got91)/2McoRatdecreased body weight inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 
SS.MNS-(D10Mco30-D10Got91)/2McoRatdecreased heart weight inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 
SS.MNS-(D10Mco30-D10Got91)/3McoRatdecreased heart weight inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 
SS.MNS-(D10Mco62-D10Got99)/McoRatdecreased heart weight inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 
SS.MNS-(D10Mco62-D10Got99)/McoRatdecreased systemic arterial blood pressure inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 
SS.MNS-(D10Mco62-D10Mco30)/McoRatdecreased systemic arterial diastolic blood pressure inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 
Bp303Ratdecreased systemic arterial systolic blood pressure  IDA  RGD 
Bp304Ratdecreased systemic arterial systolic blood pressure  IDA  RGD 
Bp305Ratdecreased systemic arterial systolic blood pressure  IDA  RGD 
SS.MNS-(D10Mco62-D10Mco30)/McoRatdecreased systemic arterial systolic blood pressure inducedIAGPcontrolled sodium content dietcompared to SS/JrRGD 

Objects referenced in this article
QTL Bp136 Blood pressure QTL 136 Rattus norvegicus
Strain SS.MNS-(D10Mco30-D10Got91)/1Mco null Rattus norvegicus
Strain SS.MNS-(D10Rat24-D10Mco31)/Jr null Rattus norvegicus

Additional Information