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The synthesis of a number of 1-alkyl-7-(2-hydroxy-3-alkylaminopropoxy)-1,8-naphthyridin-2-ones is described. The compounds studied were prepared by reaction of 1-alkyl-7-hydroxy-1,8-naphthyridin-2-ones with epichlorohydrin. The substituted epoxy intermediates obtained were allowed to react with amines and gave the desired products. All the compunds prepared were devoid of beta-blocking activity.
Eight 10-substituted benzo[b][1,5]naphthyridine derivatives containing N-(pyrrolidino)alkylamines, methanesulfonanilides, and aminoacetanilides were prepared, and their binding with DNA was studied by (a) Tm measurements and (b) the effect on DNA-dependent RNA polymerase in vitro. In addition, they were evaluated as antineoplastic agents in the P-388 test. None of the compounds exhibited anti-cancer activity.
A high-performance liquid chromatographic method for the analysis of 1-ethyl-1,4-dihydro-4-oxo-1,8-naphthyridine-3,7-dicarboxylic acid (I) in plasma and urine is described. A statistical evaluation of the assay technique has shown acceptable accuracy and precision at concentrations as high as 2.0 microgram/ml of plasma or 29.0 microgram/ml of urine for samples augmented with 1. As little as 0.08 microgram/ml of I in plasma or 0.42 microgram/ml of I in urine were quantitatively determined. The mean relative error for the assay of unknown concentrations of I in plasma and urine was +/- 8% and +/- 3%, respectively. This method was used for the analysis of I in the plasma and urine of rhesus monkeys following oral administration of 200 mg/kg of nalidixic acid.
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Hydropic alterations of the fine structure of the choroid plexus epithelium following administration of three different tertiary amines to rats were compared with alterations produced by cyclophosphamide and with normal choroid plexus. Single doses of 2,7-bis(2-diethylamino)-ethoxy)-4-methyl-1,8-naphthyridine HCl or 2,6-di-(omega-dimethyl aminoethoxy)-pyridine produced dramatic accumulations of membrane-limited vacuoles. Multiple doses of 2,7-bis-(diethylaminoethoxy)fluoren-9-one HCl (tilorone) produced accumulations of dense cytoplasmic bodies in choroid epithelial cells in addition to the hydropic vacuoles. Differential responses to these agents suggested functional specialization or temporal variation in function among adjacent choroidal cells. Despite the occurrence of pronounced plasma exudation in the plexitis following cyclophosphamide treatment, there was no hydropic vacuolization.
Sodium 6{d(-)-alpha(4-hydroxyl-1,5 naphthyridine-3-carboxamido)phenylacetamido} penicillanate (PC-904) is a new semisynthetic penicillin with broad-spectrum activity against gram-positive cocci and gram-negative bacilli. At a concentration of 1.56 mug/ml, it inhibited 100% of isolates of Proteus mirabilis, 89% of Pseudomonas aeruginosa, 67% of Escherichia coli, and 45% of Enterobacter spp. At a concentration of 12.5 mug/ml, it inhibited 75% of Klebsiella spp. and 67% of Serratia marcescens. PC-904 failed to inhibit the growth of gram-negative bacilli when large inocula were used. Some differences were noted when organisms were tested in different media or at different hydrogen ion concentrations. It is more active than mezlocillin, azlocillin, ticarcillin, carbenicillin, and amoxicillin against E. coli, Klebsiella spp., and P. aeruginosa.
The kinetics of the conversion of nalidixic acid to the 7-hydroxymethyl derivative (M-HNA) by isolated liver microsomes of several common laboratory animal species was studied under optimal conditions. The order of activity was (from greatest activity to least): monkey greater than rabbit greater than mouse greater than rat greater than dog greater than cat. The formation of 7-HNA followed apparent Michaelis-Menton kinetics in all species except the cat; the substrate concentration at half-maximal velocity was highest with mouse microsomes, while the maximum velocity was greatest with monkey microsomes. Cat, dog, mouse and rabbit microsomes formed an additional metabolite, which was identified as 6-hydroxynalidixic acid, 1-ethyl-1,4-dihydro-6-hydroxy-7-methyl-4-oxo-1,8-naphthyridine-3-carboxylic acid (6-HNA); in the cat, this was the major microsomal metabolite.
IMPORTANCE: People living with heart failure (HF) with mildly reduced or preserved ejection fraction have substantially curtailed life expectancy free from clinical events compared with their peers of comparable age. The nonsteroidal mineralocorticoid receptor antagonist, finerenone, was recently shown to reduce risks of cardiovascular events in this population over a median follow-up of 2.6 years; as patients with HF typically continue treatment beyond this time frame, estimating the potential long-term benefits of finerenone could inform shared clinical decision-making. OBJECTIVE: To estimate the projected long-term treatment effects of finerenone in patients with HF with mildly reduced or preserved ejection fraction if treated over a patient's lifetime. DESIGN, SETTING, AND PARTICIPANTS: Prespecified analyses were conducted of the FINEARTS-HF trial, a phase 3 randomized clinical trial conducted across 653 sites in 37 countries. Adults 40 years and older with symptomatic HF and left ventricular ejection fraction of 40% or greater were randomized from September 2020 to January 2023. Median (IQR) follow-up was 2.6 (1.9-3.0) years. INTERVENTIONS: Finerenone (titrated to either 20 mg or 40 mg) or placebo. MAIN OUTCOMES AND MEASURES: The primary composite outcome was time to cardiovascular death or worsening HF event. The long-term gains in survival free from a primary end point with finerenone were iteratively estimated with age-based Kaplan-Meier curves using age at randomization rather than time from randomization. Differences in areas under the survival curves between the finerenone and placebo arms represented event-free survival gains. RESULTS: Among 6001 participants (median [IQR] age, 73 [66-79] years; 3269 male [54.5%]), mean survival free from the primary end point for a 55-year-old participant was 13.6 years (95% CI, 11.9-15.2 years) with finerenone and 10.5 years (95% CI, 6.8-11.3 years) with placebo, representing a gain in event-free survival of 3.1 years (95% CI, 0.8-5.4 years; P = .007). Mean event-free survival for a 65-year-old participant was 11.0 years (95% CI, 10.1-11.9 years) with finerenone and 8.9 years (95% CI, 8.1-9.8 years) with placebo, representing a gain of 2.0 years (95% CI, 0.8-3.3 years; P = .001). Projected mean event-free survival was numerically greater with finerenone than with placebo for every starting age between 50 to 80 years. Lifetime gains in event-free survival were observed even among individuals already treated with a sodium-glucose cotransporter 2 inhibitor (65-year-old participant: 3.1 years; 95% CI, 0.1-6.0 years; P = .04). CONCLUSIONS AND RELEVANCE: In this prespecified secondary analysis of the FINEARTS-HF randomized clinical trial, long-term treatment with finerenone was estimated to extend event-free survival by up to 3 years among people with HF with mildly reduced or preserved ejection fraction. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04435626.
IMPORTANCE: Patients with heart failure (HF) and mildly reduced ejection fraction (HFmrEF) or preserved ejection fraction (HFpEF) have a spectrum of risk, and the effect of therapies may vary by risk. OBJECTIVES: To validate the Prognostic Models for Mortality and Morbidity in HFpEF (PREDICT-HFpEF) in the phase 3 randomized clinical trial Finerenone Trial to Investigate Efficacy and Safety Superior to Placebo in Patients With Heart Failure (FINEARTS-HF) and to evaluate the effect of finerenone, compared with placebo, across the spectrum of risk in these patients. DESIGN, SETTING, AND PARTICIPANTS: The FINEARTS-HF trial was conducted across 653 sites in 37 countries. Participants were adults 40 years and older with symptomatic HF and left ventricular EF of 40% or greater randomized between September 2020 and January 2023. INTERVENTION: Finerenone (titrated to 20 mg or 40 mg) or placebo. MAIN OUTCOMES AND MEASURES: The 3 PREDICT-HFpEF risk scores for the composite outcome of cardiovascular death or HF hospitalization, cardiovascular death, and all-cause death, respectively, were calculated. Predicted risk was compared with observed outcomes. Model performance was assessed using the Harrell C statistic. The rates of the predicted outcomes (plus the composite of cardiovascular death and worsening HF events, which was the primary end point in the trial) were examined according to quintiles of risk score, as was the effect of finerenone according to risk quintiles. RESULTS: A total of 6001 patients (mean [SD] age, 72 [9.6] years; 3269 male [54.5%]) were randomized in the FINEARTS-HF trial. The C statistics for cardiovascular death or HF hospitalization, cardiovascular death, and all-cause death at 2 years were 0.71 (95% CI, 0.69-0.72), 0.68 (95% CI, 0.66-0.71), and 0.69 (95% CI, 0.67-0.71), respectively. The risk of the composite outcomes was approximately 8- to 10-fold higher in those in the highest compared with the lowest risk quintile. The relative risk reduction with finerenone compared with placebo was consistent across the spectrum of risk for all outcomes examined (eg, interaction P value for primary outcome = .24). CONCLUSIONS AND RELEVANCE: Results of the FINEARTS-HF randomized clinical trial demonstrate that the PREDICT-HFpEF models performed well in terms of calibration and discrimination. Baseline risk did not modify the benefit of finerenone. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04435626.
IMPORTANCE: Heart failure (HF) with mildly reduced or preserved ejection fraction and atrial fibrillation (AF) are closely intertwined. OBJECTIVE: To examine the efficacy and safety of the nonsteroidal mineralocorticoid receptor antagonist finerenone in patients with HF with mildly reduced or preserved ejection fraction according to the absence or presence of AF and the type of AF (paroxysmal vs persistent or permanent). DESIGN, SETTING, AND PARTICIPANTS: Prespecified analyses were conducted in the Finerenone Trial to Investigate Efficacy and Safety Superior to Placebo in Patients With Heart Failure (FINEARTS-HF) randomized clinical trial. The trial was conducted across 653 sites in 37 countries. Participants were adults aged 40 years and older with symptomatic HF and left ventricular ejection fraction of 40% or greater, randomized between September 2020 and January 2023. Data analysis was conducted from September 1 to October 1, 2024. INTERVENTION: Finerenone (titrated to 20 mg or 40 mg) or placebo. MAIN OUTCOMES AND MEASURES: The primary outcome was the composite of total HF events and cardiovascular death. New-onset AF or atrial flutter (AFL) was a prespecified exploratory outcome. RESULTS: Among 5984 patients (mean [SD] age, 72.0 [9.6] years; 2724 [45.5%] female) with known AF status at baseline, 1384 (23.1%) had paroxysmal AF and 1886 (31.5%) had persistent or permanent AF. Patients with both types of AF were older and had worse HF status compared with those without AF (2714 patients [45.4%]). Both types of AF were associated with a higher unadjusted risk of the primary outcome compared with no AF (event rate per 100 person-years of follow-up, 20.3 [95% CI, 17.9-23.1] with paroxysmal AF, 19.8 [95% CI, 17.8-22.0] with persistent or permanent AF, and 11.9 [95% CI, 10.7-13.3] with no AF; rate ratio [RR], 1.62 [95% CI, 1.37-1.92] with paroxysmal AF and 1.66 [95% CI, 1.43-1.93] with persistent or permanent AF vs no AF); however, the associations were attenuated after adjustment for known prognostic variables. The benefit of finerenone on the primary outcome (overall RR, 0.84 [95% CI, 0.74-0.95]) was not modified by baseline AF status (RR, 0.80 [95% CI, 0.65-0.98] with no AF, 0.83 [95% CI, 0.65-1.06] with paroxysmal AF, and 0.85 [95% CI, 0.69-1.05] with persistent or permanent AF; P for interaction = .94). New-onset AF or AFL occurred in 6.5% of patients and was associated with a higher subsequent adjusted risk of the primary outcome (rate ratio, 3.65 [95% CI, 2.57-5.18]; P < .001). The subdistribution hazard ratio for new-onset AF or AFL among those receiving finerenone vs placebo was 0.77 (95% CI, 0.57-1.04; P = .09). CONCLUSIONS AND RELEVANCE: The efficacy of finerenone was consistent regardless of AF status. New-onset AF was associated with a substantially higher risk of subsequent outcomes. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04435626.
IMPORTANCE: The mode of death in patients with heart failure with mildly reduced ejection fraction (HFmrEF) or heart failure with preserved ejection fraction (HFpEF) remains poorly understood and may vary by EF. OBJECTIVE: To evaluate the mode of death according to EF and the treatment effect of finerenone on cause-specific mortality in patients with HFmrEF/HFpEF. DESIGN, SETTING, AND PARTICIPANTS: This was a prespecified secondary analysis of the Finerenone Trial to Investigate Efficacy and Safety Superior to Placebo in Patients With Heart Failure (FINEARTS-HF) randomized clinical trial, which evaluated clinical outcomes in 6001 patients with HF and EF greater than or equal to 40% randomly assigned to finerenone or placebo. The mode of death in relation to baseline EF categories (<50%, ≥50-<60%, and ≥60%) was examined, and the effect of randomized treatment on cause-specific death in Cox regression models was assessed. Data analysis was conducted between September 2024 and January 2025. INTERVENTIONS: Finerenone vs placebo. MAIN OUTCOMES AND MEASURES: Mode of death as centrally adjudicated by a clinical end points committee. RESULTS: Of 1013 patients (16.9%; median [IQR] age, 76 [69-82] years; 594 male [58.6%]) who died during median (IQR) follow-up of 32 (23-36) months, mode of death was ascribed to cardiovascular causes in 502 (49.6%), noncardiovascular causes in 368 (36.3%), and undetermined cause in 143 (14.1%). Of cardiovascular deaths, 215 (42.8%) were due to sudden death, 163 (32.4%) to HF, 48 (9.6%) to stroke, 25 (5.0%) to myocardial infarction, and 51 (10.2%) to other cardiovascular causes. The proportion of all-cause, cardiovascular, and sudden death was higher in those with EF less than 50%. The proportion of deaths related to HF was similar across EF categories, and the proportion of deaths due to myocardial infarction, stroke, and other cardiovascular causes was low regardless of EF. Randomization to finerenone did not significantly reduce death or cause-specific death compared with placebo in any EF category. CONCLUSIONS AND RELEVANCE: Among patients with HFmrEF/HFpEF in the FINEARTS-HF randomized clinical trial, higher proportions of cardiovascular and overall mortality in those with EF less than 50% were related principally to higher proportions of sudden death. A clear treatment effect of finerenone on cardiovascular or cause-specific mortality was not identified, although the trial was likely underpowered for these outcomes. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04435626.
IMPORTANCE: Patients with chronic heart failure (HF) and left ventricular ejection fraction (LVEF) less than 40% who experience LVEF improvement to 40% or higher (HFimpEF) may still face residual risks. OBJECTIVE: To assess the clinical profiles, risk, and treatment response to finerenone in participants with HFimpEF. DESIGN, SETTING, AND PARTICIPANTS: A total of 6001 patients with HE, LVEF of 40% or higher, New York Heart Association class II to IV symptoms, and elevated natriuretic peptide levels, were enrolled between September 14, 2020, and January 10, 2023. Patients with a prior history of LVEF less than 40% were included. Data analysis was conducted between September 1 to December 10, 2024. INTERVENTION: Participants received finerenone (titrated to 20 mg or 40 mg) or placebo. MAIN OUTCOMES AND MEASURES: The primary end point was the composite of cardiovascular (CV) death and total (first and recurrent) worsening HF events. RESULTS: Of the 6001 participants (mean [SD] age, 72 [9.7], years; 3269 male [55%]), 273 (5%) had a prior LVEF less than 40%. Among those with a prior LVEF of less than 40%, the median recorded prior LVEF was 35% [IQR, 30%-37%], with a median improvement of 12% [IQR, 8%-17%]. Over a median follow-up of 2.6 years, those with a history of LVEF of less than 40% experienced higher rates of the primary outcome of a composite of CV death and worsening of HF events (21.4 per 100 patient-years vs 16.0 per 100 patient-years) than did those whose LVEF was consistently 40% or higher. After adjustment for clinically relevant covariates; however, this rate ratio (RR) was not statistically different (absolute RR, 1.13; 95% CI, 0.85-1.49, P = .39). The treatment effect of finerenone on the primary outcome was consistent among those with a history of LVEF less than 40% and those with LVEF that was consistently 40% or higher (P for interaction = .36). Owing to higher baseline risk, the absolute risk reduction was greater among those with HFimpEF (9.2 vs 2.5 per 100 patient-years). Patients with HFimpEF tended to develop more hypotension with finerenone treatment, but otherwise, the safety profile of finerenone was similar in patients with and without previous LVEF less than 40%. CONCLUSIONS AND RELEVANCE: In this prespecified analysis of a randomized clinical trial, patients with HFimpEF remained at high risk of CV events, underscoring the need for continued management despite LVEF improvement. The treatment benefits of finerenone observed among the overall population of patients with HF with preserved EF were consistent among patients with HFimpEF. TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT04435626.