What question did this study set out to answer?

The study aims to investigate the role of Na+-Ca2+ exchange in altered Ca2+ handling post-myocardial infarction in cardiac myocytes.

August 23, 2002Circulation ResearchOpen Access

Increased Exchange Current but Normal Ca 2+ Transport via Na + -Ca 2+ Exchange During Cardiac Hypertrophy After Myocardial Infarction

View Full Paper

Ask AI

Bookmark

Population

Rat ventricular myocytes 5 to 6 months after experimental myocardial infarction produced by left coronary…

Comparison

Experimental myocardial infarction (PMI) model vs Sham-operated (SO) hearts

Design

Preclinical

Follow-up

5 to 6 months

Authors

AGAna M. GómezElectrophysiology BSBeat SchwallerUniversity of Fribourg HPH. PorzigUniversity of Bern

Discussion

Member takes

Implication

Supports compensatory NCX upregulation in post-MI rat hypertrophy; leaves open relevance to human HF Ca2+ handling.

Key Points

The study aims to investigate the role of Na+-Ca2+ exchange in altered Ca2+ handling post-myocardial infarction in cardiac myocytes.
Analyzed NCX function in rat ventricular myocytes 5-6 months post-myocardial infarction via left coronary artery ligation.
Measured I(NaCa) density and total NCX protein expression in myocytes from infarcted and sham-operated hearts.
Used patch-clamp technique and confocal microscopy to assess Ca2+ transport and I(NaCa) current.
I(NaCa) density was 2.6-fold higher in myocytes from infarcted rats compared to sham-operated hearts.
Total NCX protein expression was increased in myocytes from myocardial infarction rats.
Ca2+ transport via NCX was similar between PMI and SO myocytes despite higher I(NaCa) density, attributed to a reduced surface/volume ratio.

Structured PICO

Population

Rat ventricular myocytes 5 to 6 months after experimental myocardial infarction (PMI) produced by left coronary artery ligation

Intervention

Experimental myocardial infarction (PMI) model

Comparator

Sham-operated (SO) hearts

Outcome

NCX function (I(NaCa) density and Ca2+ transport)surrogate

In a rat model of post-MI cardiac hypertrophy, increased NCX density maintains normal Ca2+ extrusion despite a reduced surface-to-volume ratio, allowing adequate cell relaxation.

Cite This Study

Gómez et al. (2002) studied this question.

synapsesocial.com/papers/6a701a6fe71d69abee085fa8 https://doi.org/10.1161/01.res.0000031384.55006.db

View Full Paper

Ask AI

Bookmark

Increased Exchange Current but Normal Ca 2+ Transport via Na + -Ca 2+ Exchange During Cardiac Hypertrophy After Myocardial Infarction

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Increased Exchange Current but Normal Ca 2+ Transport via Na + -Ca 2+ Exchange During Cardiac Hypertrophy After Myocardial Infarction

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider