In contrast, in sexual populations recombination is expected to erode associations between beneficial mutations and mutator alleles, preventing mutator hitchhiking and leading to mutator decline due to persistent deleterious mutational pressure [[ 2, 9- 11], but see [ 12- 15]].
We studied this mechanism in rat right ventricles submitted to pulmonary arterial hypertension, because it is known that this ventricle is very vulnerable to the deleterious effects of pressure overload.
The potentially deleterious higher airway pressures observed in previous strategies that incorporated high PEEP and LRMs may be avoided by reducing tidal volume, a practice that may require permissive hypercapnia.
The findings were in keeping with the concept that a left-hand position "may exert deleterious effects" on heart pressure, cardiac output or the functioning of cardiac nerves and thus "may be a protective strategy," researchers said, adding that the position choice might arise from discomfort from perceiving a stronger heartbeat.
Specifically, we have tested the effects of AHCC on LPS-induced deleterious effects on blood pressure and gut injury in conscious rats.
Bergstrom and Pritchart [24] suggested that long-term bottlenecks increase the selection pressure on deleterious mutations by increasing the variance in fitness among hosts.
Because L1 insertions in these regions are generally more than 20 kb away from genes, we hypothesize that negative selection pressure against deleterious effects of L1 insertion could also play a role in the genomic distribution of L1 elements.
Interventions in early life in order to promote weight gain by increasing caloric or protein intake have shown that modulation of infant growth during first months of life could lead to deleterious changes in blood pressure, altered flow-mediated endothelial dilatation [48], [49], [50].
This would lead to chronically higher sustained pressure and deleterious effects on the systemic arterial circulation.
For CAD, mortality typically occurs after the reproductive years, thus reducing selection pressure against deleterious alleles.
