Clinical trial NCT00251615: Calcium Channel Splice Variant Expression in Cardiovascular Disease and Aging
Official title: Calcium Channel Splice Variant Expression in Cardiovascular Disease and Aging
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Atherosclerosis
Keywords: vascular surgery
vascular aging
arterial aging
surgical tissue
Aging
Lead sponsor: National Institutes of Health Clinical Center (CC)
Sponsor class: NIH
First posted: 2005-11-10
Enrollment: 18
Sex: ALL
Minimum age (years): 21
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: CROSS_SECTIONAL
Sampling method: PROBABILITY_SAMPLE
Study population: Patients scheduled for vascular surgery

Brief summary: The purpose of this study is to learn what changes in blood vessel contraction may occur as a result of a disease of the vessel that requires surgery. The study will examine the calcium channels present in the vessels being operated on, and the genes that may alter blood vessel function. Possible variation in these genes may change the kind of calcium channels present in blood vessels.

Detailed description: The goal of this study is to learn more about how blood vessels function and the mechanism that causes them to contract. The study will investigate the natural history of diseased blood vessel tissue and the calcium channels in the muscle part of the blood vessel. The study will also examine how genetics influences cardiovascular disease and its causes and treatments.

Patients scheduled for vascular surgery will be approached to participate in this study. During surgery, tissue fragments of diseased and marginal tissue will be obtained. A blood sample will be obtained at either the time of surgery or consent and genomic DNA will be extracted.

Eligibility criteria: Inclusion Criteria:

* Ages 21 and older
* Scheduled for vascular surgery

Exclusion Criteria:

* Unwillingness to be subjected to diagnostic and/or therapeutic procedures that are deemed not necessary for clinical management
* Volunteers deemed too fragile to participate in the study by the principal investigator (PI) or the attending physician
* Inability to obtain informed consent from either the volunteer or the responsible party (durable power of attorney \[DPA\]) for the volunteer, with the volunteer's assent

Primary outcomes:
Secondary outcomes:
Other outcomes:
Locations:
city: Baltimore
country: United States
facility: National Institute on Aging, Harbor Hospital
state: Maryland
Study officials:
affiliation: National Institute on Aging (NIA)
name: Samer Najjar, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Harry JB, Kobrinsky E, Abernethy DR, Soldatov NM. New short splice variants of the human cardiac Cavbeta2 subunit: redefining the major functional motifs implemented in modulation of the Cav1.2 channel. J Biol Chem. 2004 Nov 5;279(45):46367-72. doi: 10.1074/jbc.M409523200. Epub 2004 Aug 31.
citation: Kobrinsky E, Tiwari S, Maltsev VA, Harry JB, Lakatta E, Abernethy DR, Soldatov NM. Differential role of the alpha1C subunit tails in regulation of the Cav1.2 channel by membrane potential, beta subunits, and Ca2+ ions. J Biol Chem. 2005 Apr 1;280(13):12474-85. doi: 10.1074/jbc.M412140200. Epub 2005 Jan 25.
citation: Abernethy DR, Soldatov NM. Structure-functional diversity of human L-type Ca2+ channel: perspectives for new pharmacological targets. J Pharmacol Exp Ther. 2002 Mar;300(3):724-8. doi: 10.1124/jpet.300.3.724.