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- Conceicao, I., et al.
(författare)
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Phase 2 open-label extension study of patisiran, an investigational siRNA agent for hereditary ATTR amyloidosis with polyneuropathy (hATTR-PN)
- 2016
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Ingår i: Neuromuscular Disorders. - : Elsevier. - 0960-8966 .- 1873-2364. ; 26, s. S142-S142
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Hereditary ATTR amyloidosis with polyneuropathy (hATTR-PN), also known as familial amyloidotic polyneuropathy (FAP), is an inherited, progressive disease that can cause sensory, motor, and autonomic dysfunction, resulting in significant disability and death. Patisiran is an investigational, systemically administered small interfering RNA (siRNA) targeting wild-type and mutant TTR. A recently completed multi-center, multi-dose Phase 2 trial of patisiran in hATTR-PN patients (N = 29) showed >80% sustained mean knockdown of serum TTR when administered at a dose of 0.3 mg/kg every 3 weeks with a generally favorable safety profile. Phase 2 open label (OLE) study to evaluate patisiran's safety effect on serum TTR levels, impact on neuropathy impairment scores and QOL. Twenty-seven patients with hATTR-PN were enrolled; median age 64 years (range: 29–77 years). Patisiran was well tolerated throughout the23-months of follow-up. Five patients experienced SAEs (unrelated) including one discontinuation and subsequent death (gastroesophageal cancer). Flushing (25.9%) and infusion-related reactions (18.5%) were mild AEs; and did not result in any discontinuations. Approximately 80% sustained mean serum TTR lowering was obtained with a mean nadir of up to 93% between doses. Among the 20 evaluable patients, neuropathy impairment scores were stable with a mean change in mNIS+7 and NIS of 1.7 and 4.2 points, respectively. This compares favorably to 17–26 point mNIS+7/NIS increase at 18-months from prior hATTR-PN studies. Stabilization of quality of life (QOL) measures and significant improvement of distal thigh sweat gland nerve fiber density was observed. Long-term (>18 months) patisiran administration was generally well tolerated, resulted in sustained mean serum TTR lowering; supporting the hypothesis that TTR knockdown potentially halts neuropathy progression. As of March 2016, dosing continues; updated results will be presented.
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- Ellinghaus, David, et al.
(författare)
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Analysis of five chronic inflammatory diseases identifies 27 new associations and highlights disease-specific patterns at shared loci
- 2016
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Ingår i: Nature Genetics. - New York, USA : Nature Publishing Group. - 1061-4036 .- 1546-1718. ; 48:5, s. 510-518
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Tidskriftsartikel (refereegranskat)abstract
- We simultaneously investigated the genetic landscape of ankylosing spondylitis, Crohn's disease, psoriasis, primary sclerosing cholangitis and ulcerative colitis to investigate pleiotropy and the relationship between these clinically related diseases. Using high-density genotype data from more than 86,000 individuals of European ancestry, we identified 244 independent multidisease signals, including 27 new genome-wide significant susceptibility loci and 3 unreported shared risk loci. Complex pleiotropy was supported when contrasting multidisease signals with expression data sets from human, rat and mouse together with epigenetic and expressed enhancer profiles. The comorbidities among the five immune diseases were best explained by biological pleiotropy rather than heterogeneity (a subgroup of cases genetically identical to those with another disease, possibly owing to diagnostic misclassification, molecular subtypes or excessive comorbidity). In particular, the strong comorbidity between primary sclerosing cholangitis and inflammatory bowel disease is likely the result of a unique disease, which is genetically distinct from classical inflammatory bowel disease phenotypes.
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- Medjanik, Katerina, et al.
(författare)
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Donor-anion interactions at the charge localization and charge ordering transitions of (TMTTF)(2)AsF6 probed by NEXAFS
- 2015
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Ingår i: Physical Chemistry Chemical Physics. - : Royal Society of Chemistry (RSC). - 1463-9084 .- 1463-9076. ; 17:29, s. 19202-19214
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Tidskriftsartikel (refereegranskat)abstract
- High-resolution near-edge X-ray absorption fine structure (NEXAFS) measurements at the As M-edge, F K-edge and S L-edge of the Fabre salt (TMTTF)(2)AsF6 were performed from room temperature (RT) to 90 K, allowing to reach the charge localization regime below T-rho approximate to 230 K and to cross the charge ordering (CO) transition at T-CO approximate to 102 K. The F K-edge and S L-edge spectra exhibit several transitions which have been indexed on the basis of first-principles DFT calculations. Upon cooling from RT significant energy shifts up to +0.8 eV and -0.4 eV were observed in transitions exhibited by the F 1s and S 2p spectra respectively, while the As 3p doublet does not show a significant shift. Opposite energy shifts found in the F 1s and S 2p spectra reflect substantial thermal changes in the electronic environment of F atoms of the anion and S atoms of TMTTF. The changes found around the charge localization crossover suggest an increase of the participation of the S d orbitals in the empty states of TMTTF as well as an increase of the strength of donor...anion interactions. A new F 1s pre-edge signal detected upon entry into the CO phase is a clear fingerprint of the symmetry breaking occurring at TCO. We propose that this new transition is caused by a substantial mixing between the HOMO of the AsF6- anion and the unoccupied part of the TMTTF HOMO conduction band. Analysis of the whole spectra also suggests that the loss of the inversion symmetry associated with the CO is due to an anion displacement increasing the strength of S...F interactions. Our data show unambiguously that anions are not, as previously assumed, innocent spectators during the electronic modifications experienced by the Fabre salts upon cooling. In particular the interpretation of the spectra pointing out a thermally dependent mixing of anion wave functions with those of the TMTTF chains demonstrates for the first time the importance of anion-donor interactions.
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