The activity of aminoglycosides, which are used to treat Pseudomonas aeruginosa respiratory infection in cystic fibrosis (CF) patients, is reduced under the anaerobic conditions that reflect the CF lung in vivo. In contrast, a 4:1 (wt/wt) combination of fosfomycin and tobramycin (F:T), which is under investigation for use in the treatment of CF lung infection, has increased activity against P. aeruginosa under anaerobic conditions. The aim of this study was to elucidate the mechanisms underlying the increased activity of F:T under anaerobic conditions. Microarray analysis was used to identify the transcriptional basis of increased F:T activity under anaerobic conditions, and key findings were confirmed by microbiological tests, including nitrate utilization assays, growth curves, and susceptibility testing. Notably, growth in subinhibitory concentrations of F:T, but not tobramycin or fosfomycin alone, significantly downregulated (P < 0.05) nitrate reductase genes narG and narH, which are essential for normal anaerobic growth of P. aeruginosa. Under anaerobic conditions, F:T significantly decreased (P < 0.001) nitrate utilization in P. aeruginosa strains PAO1, PA14, and PA14 lasR::Gm, a mutant known to exhibit increased nitrate utilization. A similar effect was observed with two clinical P. aeruginosa isolates. Growth curves indicate that nitrate reductase transposon mutants had reduced growth under anaerobic conditions, with these mutants also having increased susceptibility to F:T compared to the wild type under similar conditions. The results of this study suggest that downregulation of nitrate reductase genes resulting in reduced nitrate utilization is the mechanism underlying the increased activity of F:T under anaerobic conditions.
Abstract Background/Aims Filgotinib is an oral, preferential janus kinase 1 inhibitor. FINCH 1 (NCT02889796) was a phase III, double-blind, placebo- and active-controlled study evaluating filgotinib efficacy and safety in patients with rheumatoid arthritis (RA) after inadequate response to methotrexate (MTX; MTX-IR). Methods MTX-IR patients with moderately or severely active RA were randomised (3:3:2:3) to filgotinib 200 mg daily, filgotinib 100 mg daily, adalimumab 40 mg every 2 weeks, or placebo on a background of stable MTX for up to 52 weeks. An exploratory subgroup analysis of FINCH 1 was conducted in patients with moderately active RA based on Disease Activity Score in 28 joints with C-reactive protein (DAS28[CRP])>3.2-≤5.1 at baseline. Proportion of patients achieving 20%/50%/70% improvement from baseline in American College of Rheumatology core criteria (ACR20/50/70), DAS28(CRP)≤3.2, DAS28(CRP)<2.6, change from baseline in Health Assessment Questionnaire-Disability Index (HAQ-DI), Short Form-36 Physical Component Score (SF-36 PCS), patient-reported pain, and modified total Sharp/van der Heijde score (mTSS) were assessed at week (W)12 and W24. All analyses were exploratory without multiplicity adjustment; nominal P-values are reported. Results Of 1,755 treated patients, 24% had moderate disease at baseline with similar proportions (21.9%-26.9%) across treatment groups. In each treatment arm, baseline characteristics were well balanced for the moderate disease activity subpopulation. The majority (77%) were female, mean (standard deviation [SD]) duration of RA was 7.8 (7.7) years; mean (SD) baseline DAS28(CRP) was 4.6 (0.42). At W12 and W24, proportions achieving ACR20/50/70, DAS28(CRP)<2.6, and DAS28(CRP)≤3.2 were significantly higher for both filgotinib doses relative to placebo (Table). Improvement in HAQ-DI was significantly greater vs placebo at W12 but not W24 for both filgotinib doses (Table 1). For both doses of filgotinib vs placebo, SF-36 PCS and pain were significantly improved and there was numerically less radiographic progression as assessed by mTSS at W12 and W24 (Table). Composite disease activity, HAQ-DI, and mTSS scores with both filgotinib doses were comparable to adalimumab. P128 Table 1:Efficacy outcomes at week 12 and week 24Week 12Week 24FIL 200 mg (n = 104)FIL 100 mg (n = 121)ADA (n = 72)PBO (n = 128)FIL 200 mg (n = 104)FIL 100 mg (n = 121)ADA (n = 72)PBO (n = 128)ACR2077.9***67.8***65.343.872.1**75.2***68.154.7ACR5043.3***37.2***41.716.452.9***47.1**56.930.5ACR7019.2***17.4***15.33.932.7***29.8**29.213.3DAS28 (CRP)<2.647.1***37.2***44.415.661.5***46.3***50.023.4DAS28 (CRP)≤3.267.3***63.6***66.739.174.0***73.6***62.549.2ΔHAQ-DI−0.51a,***−0.40b,*−0.47c−0.28d−0.57e−0.53f−0.65g−0.48hΔmTSS0.02i0.06j0.03k0.16l−0.04m,*0.11n−0.01o0.21pΔSF-36 PCS7.8q,***6.4r,***7.0s3.7t8.8u,**7.2v,*9.5w5.8xΔPain, mm−24***−23***−23−12−28***−28***−28−21***P<0.001 vs PBO;**P<0.01 vs PBO;*P<0.05 vs PBO; all P-values are nominal. Binary efficacy endpoints were compared between FIL and PBO using Fisher's exact test. Comparisons of change from baseline between FIL vs PBO were conducted using mixed-effects models for repeated measures including treatment group, visit, treatment group by visit, baseline value as fixed effects, and subjects as random effect.an = 98;bn = 114;cn = 67;dn = 117;en = 89;fn = 108;gn = 61;hn = 100;in = 94;jn = 113;kn = 62;ln = 112;mn = 89;nn = 105;on = 60;pn = 97;qn = 99;rn = 116;sn = 67;tn = 118;un = 91;vn = 109;wn = 62;xn = 100.ΔHAQ-DI, change from baseline in Health Assessment Questionnaire-Disability Index; ΔmTSS, change from baseline in modified total Sharp/van der Heijde score; ΔSF-36 PCS, change from baseline in Short Form-36 Physical Component Score; ACR, American College of Rheumatology; ADA, adalimumab; DAS28(CRP), Disease Activity Score in 28 joints with C-reactive protein; FIL, filgotinib; PBO, placebo. Conclusion In a subgroup of patients from FINCH 1 with baseline moderately active RA, significantly greater improvements in disease activity were observed with both filgotinib doses over placebo and associated with lower radiographic progression and reduced functional deficit. Disclosure M.H. Buch: Consultancies; MHB reports serving as a consultant for AbbVie; Eli Lilly; Gilead Sciences, Inc.; Sandoz; Sanofi; and Serono. Grants/research support; MHB reports grants or research support from Pfizer, Roche, and UCB. D. Walker: Grants/research support; DW has received funding from Bristol-Myers Squibb; Eli Lilly; Gilead Sciences, Inc.; Novartis; and Pfizer, Inc. P.D.W. Kiely: Other; PK has attended advisory boards, been part of a speakers bureau, or received support to attend educational meetings from AbbVie, Gilead, Lilly, Novartis, and Sanofi. C.J. Edwards: Consultancies; CJE has provided consultancy for AbbVie; Biogen; Bristol-Myers Squibb; Celgene; Eli Lilly; Fresenius; Gilead Sciences, Inc.; GSK; Janssen; MSD; Mundipharma; Pfizer; Roche; Samsung; and Sanofi. Member of speakers’ bureau; CJE has served on speaker's bureaus for AbbVie; Biogen; Bristol-Myers Squibb; Celgene; Eli Lilly; Fresenius; Gilead Sciences, Inc.; GSK; Janssen; MSD; Mundipharma; Pfizer; Roche; Samsung; and Sanofi. Grants/research support; CJE reports grants from AbbVie; Biogen; Bristol-Myers Squibb; Celgene; Eli Lilly; Fresenius; Gilead Sciences, Inc.; GSK; Janssen; MSD; Mundipharma; Pfizer; Roche; Samsung; and Sanofi. J. Barry: Corporate appointments; JB is an employee of Gilead Sciences Ltd. G. McCaughey: Corporate appointments; GMcC is an employee of Gilead Sciences Ltd. L. Akroyd: Corporate appointments; LA is an employee of Gilead Sciences Ltd. I. Tiamiyu: Corporate appointments; IT is an employee of Gilead Sciences, Inc. L. Ye: Corporate appointments; LY is an employee of Gilead Sciences, Inc. K. Chen: Corporate appointments; KC is an employee of Gilead Sciences, Inc. P.C. Taylor: Consultancies; PCT has served as a consultant to AbbVie, Biogen, Galapagos, Gilead, GlaxoSmithKline, Janssen, Lilly, Pfizer, BMS, Roche, Sanofi, Nordic Pharma, Fresenius, and UCB. Grants/research support; PCT reports research grants from Gilead Sciences, Inc.; Galapagos, and Celgene.
Abstract Background Fabry Disease (FD) is a rare X-linked metabolic lysosomal disorder. FD has a broad range of symptoms which vary markedly between patients. The heterogenous nature of the disease makes diagnosis difficult for health care professionals (HCPs), which in turn has a significant effect on the patient’s quality of life (QoL). As few adolescent patients are eligible for treatment, to date there has been little published data on the burden of disease and impact of treatment on these patients and their caregivers. This study was developed to provide some insight into these groups. Methods An online-based survey was performed to gather further insights on the burden of FD in 14 adolescents aged 12–15 years old across three European countries, from the perspective of the patients, caregivers and HCPs. Results Symptom burden was found to be high in the adolescent population, with ‘pain’ and ‘intolerance to heat or cold’ commonly reported symptoms, both by patients and to HCPs. Eleven of the 14 patients surveyed were receiving enzyme replacement therapy (ERT), with their post-ERT symptomology showing improvement when compared to symptoms before receiving ERT. The majority of caregivers believe their child’s overall health has improved since starting ERT. While there was a positive outlook towards ERT noted by the patients and caregivers, 4/5 HCPs believed there is ‘a need for more efficacious treatment options’ and all HCPs noted that there is ‘a need for more manageable treatment options’. FD was shown to place a burden on caregivers, who reported feelings of guilt and absences from work. Conclusions Data show there is a significant symptom burden for the adolescent, which affects their QoL and mental health, as well as placing a burden on the wider family. While ERT is an effective treatment and provides symptom relief for many of the respondents in the survey, they still reported symptom burden. Additionally, there was reporting of reluctance to engage in treatment or difficulties associated with the treatment. Heterogeneity in symptom presentation suggests that the treatment regimen needs to be tailored to the individual. Physicians therefore need to have a choice of treatment options available to help them manage symptoms and disease where the benefit to risk ratio is in favour of undergoing treatment.
'%3e%3cpath fill='%23012169' d='M0 0v30h60V0z'/%3e%3cpath stroke='%23fff' stroke-width='6' d='m0 0 60 30m0-30L0 30'/%3e%3cpath stroke='%23C8102E' stroke-width='4' d='m0 0 60 30m0-30L0 30' clip-path='url(%23b)'/%3e%3cpath stroke='%23fff' stroke-width='10' d='M30 0v30M0 15h60'/%3e%3cpath stroke='%23C8102E' stroke-width='6' d='M30 0v30M0 15h60'/%3e%3c/g%3e%3c/svg%3e)
'/%3e%3c/defs%3e%3cpath fill='%23012169' d='M0 0h10080v5040H0z'/%3e%3cpath stroke='%23fff' stroke-width='.6' d='m0 0 6 3m0-3L0 3' clip-path='url(%23b)' transform='scale(840)'/%3e%3cpath stroke='%23e4002b' stroke-width='.4' d='m0 0 6 3m0-3L0 3' clip-path='url(%23c)' transform='scale(840)'/%3e%3cpath stroke='%23fff' stroke-width='840' d='M2520 0v2520M0 1260h5040'/%3e%3cpath stroke='%23e4002b' stroke-width='504' d='M2520 0v2520M0 1260h5040'/%3e%3cg fill='%23fff'%3e%3cuse xlink:href='%23d' x='2520' y='3780'/%3e%3cuse xlink:href='%23a' x='7560' y='4200'/%3e%3cuse xlink:href='%23a' x='6300' y='2205'/%3e%3cuse xlink:href='%23a' x='7560' y='840'/%3e%3cuse xlink:href='%23a' x='8680' y='1869'/%3e%3cuse xlink:href='%23e' x='8064' y='2730'/%3e%3c/g%3e%3c/svg%3e)
