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Sporadic non-ampullary duodenal adenomas are rare (prevalence<0.5%). We present the case of a 73-year-old woman in whom a large duodenal lesion with an adenomatous appearance was visualised during gastroscopy.

Background: Biological therapy dose modification is a common practice in the long-term treatment of plaque psoriasis., Objective: The objective of the study was to determine prevalence, characteristics of patients, effectiveness, treatment survival of secukinumab dose reduction (SEC-DR) strategy and assess its safety and cost implications., Methods: A retrospective, observational, multicenter cohort study was conducted in patients with plaque psoriasis treated with secukinumab and up to 2 years of follow-up., Results: In 63/347 patients with an initial standard dose regimen, SEC-DR was tried at any moment in 18.2% of them after sustained response. In 51 patients, the interval between administrations was increased while in 12 patients, monthly dose was reduced to 150 mg. Successful SEC-DR was achieved in 77.8% of the patients, with sustained PASI response to the end of the study. Survival of secukinumab treatment and safety profile were not compromised by DR. The use of DR saved 33% of the cost, including failures in which standard treatment was resumed., Limitations: The proper of the study designed and the arbitrary definition of "DR success.", Conclusion: Off-label SEC-DR strategy was used in patients with sustained response to standard dose regimen; this strategy showed long-term efficacy without compromising treatment survival or worsening the safety profile while also being cost saving., (© 2024 the International Society of Dermatology.)

Thermostability is an important and desired feature of therapeutic proteins and is critical for the success or failure of protein drugs development. It can be increased by PEGylation-binding of poly(ethylene glycol) moieties-or glycosylation-post-translational modification to add glycans. Here, the thermostability and thermodynamic parameters of native, PEGylated, and glycosylated versions of the antileukemic enzyme crisantaspase were investigated. First-order kinetics was found to describe the irreversible deactivation process. Activation energy of the enzyme-catalyzed reaction ( E *) was estimated for native, PEGylated, and glycosylated enzyme (10.2, 14.8, and 18.8 kJ mol -1 respectively). Half-life decreased progressively with increasing temperature, and longer half-life was observed for PEG-crisantaspase (87.74 min) at 50 °C compared to the native form (9.79 min). The activation energy of denaturation of PEG-crisantaspase (307.1 kJ mol -1 ) was higher than for crisantaspase (218.1 kJ mol -1 ) and Glyco-crisantaspase (120.0 kJ mol -1 ), which means that more energy is required to overcome the energy barrier of the unfolding process. According to our results, PEG-crisantaspase is more thermostable than its native form, while Glyco-crisantaspase is more thermosensitive.

Background: The past 5 years have seen a proliferation of new treatments for atopic dermatitis (AD). We analyzed recent drug survival data for cyclosporine in this setting. Because the Spanish National Healthcare system requires patients with AD to be treated with cyclosporine before they can be prescribed other systemic treatments, drug survival for cyclosporine may be shorter than in other diseases., Material and Method: Multicenter, observational, prospective cohort study using data from the Spanish Atopic Dermatitis Registry (BIOBADATOP). Data from the Spanish Registry of Systemic Treatments in Psoriasis (BIOBADADERM) were used to create a comparison cohort., Results: We analyzed data for 130 patients with AD treated with cyclosporine (median drug survival, 1 year). Median cyclosporine survival in the psoriasis comparison group (150 patients) was 0.37 years. Drug survival was significantly longer in AD than in psoriasis (P<.001)., Conclusion: Drug survival of cyclosporine in the BIOBADATOP registry is similar to that described in other series of patients with AD and longer than that observed in the BIOBADADERM psoriasis registry., (Copyright © 2023 AEDV. Publicado por Elsevier España, S.L.U. All rights reserved.)

The understanding of protein-protein interaction mechanisms is key to the atomistic description of cell signaling pathways and for the development of new drugs. In this context, the mechanism of intrinsically disordered proteins folding upon binding has attracted attention. The VirB9 C-terminal domain (VirB9 Ct ) and the VirB7 N-terminal motif (VirB7 Nt ) associate with VirB10 to form the outer membrane core complex of the Type IV Secretion System injectisome. Despite forming a stable and rigid complex, VirB7 Nt behaves as a random coil, while VirB9 Ct is intrinsically dynamic in the free state. Here we combined NMR, stopped-flow fluorescence, and computer simulations using structure-based models to characterize the VirB9 Ct -VirB7 Nt coupled folding and binding mechanism. Qualitative data analysis suggested that VirB9 Ct preferentially binds to VirB7 Nt by way of a conformational selection mechanism at lower temperatures. However, at higher temperatures, energy barriers between different VirB9 Ct conformations are more easily surpassed. Under these conditions the formation of non-native initial encounter complexes may provide alternative pathways toward the native complex conformation. These observations highlight the intimate relationship between folding and binding, calling attention to the fact that the two molecular partners must search for the most favored intramolecular and intermolecular interactions on a rugged and funnelled conformational energy landscape, along which multiple intermediates may lead to the final native state.

Background: Safety is an important consideration in decisions on treatment for patients with moderate-to-severe psoriasis and the study of drug safety is the main purpose of the BIOBADADERM registry. The combination of a biologic agent and a conventional systemic drug [generally methotrexate (MTX)] is a common treatment in clinical practice. However, there is a paucity of evidence from real-world practice on the safety of such combination regimens in the treatment of psoriasis., Objectives: The primary objective of this study was to ascertain whether the use of regimens combining biologic drugs with MTX in the management of moderate-to-severe psoriasis increases the risk of adverse events (AEs) or serious AEs (SAEs). We compared monotherapy using tumour necrosis factor (TNF), interleukin (IL)-17 and IL-23 inhibitors with the use of the same drugs in combination with MTX., Methods: Using data from the BIOBADADERM registry, we compared biologic monotherapies with therapies that were combined with MTX. We estimated adjusted incidence rate ratios (aIRR) using a random effects Poisson regression with 95% confidence intervals for all AEs, SAEs, infections and serious infections and other AEs by system organ class., Results: We analysed data from 2829 patients and 5441 treatment cycles, a total of 12 853 patient-years. The combination of a biologic with MTX was not associated with statistically significant increases in overall risk of AEs or SAEs in any treatment group. No increase in the total number of infections or serious infections in patients receiving combined therapy was observed for any group. However, treatment with a TNF inhibitor combined with MTX was associated with an increase in the incidence of gastrointestinal AEs (aIRR 2.50, 95% CI 1.57-3.98; P < 0.002)., Conclusions: The risk of AEs and SAEs was not significantly increased in patients with moderate-to-severe psoriasis receiving different classes of biologic drugs combined with MTX compared with those on biologic monotherapy., Competing Interests: Conflicts of interest J.M.C. has participated as a speaker and/or advisor and/or principal investigator/senior investigator in clinical trials sponsored by for Celgene, Janssen, Lilly, Leo Pharma, Novartis, Pfizer, MSD, Biogen, Mylan, Amgen, AbbVie and Sandoz. A.G.-Q. acted as consultant and/or speaker for and/or participated in clinical trials as principal investigator and subinvestiator for AbbVie, Almirall, Amgen, Boehringer, Janssen, Leo Pharma, Lilly, Novartis, MSD, Pfizer-Wyeth and UCB. R.R.-D. acted as consultant and/or speaker for and/or participated in clinical trials as principal investigator for AbbVie, Almirall, Amgen, Boehringer, Janssen, Leo Pharma, Lilly, Novartis, MSD, Pfizer-Wyeth and UCB. A.S.-T. has served as a consultant and/or paid speaker for and/or participated in clinical trials sponsored by companies that manufacture drugs used for the treatment of psoriasis, including AbbVie, Celgene, Janssen-Cilag, LEO Pharma, Lilly, Novartis and Pfizer. M.L.-V. acted as a consultant and speaker and participated in clinical trials for Janssen-Cilag, AbbVie, Boehringer, Celgene, Pfizer, Novartis, Lilly, Almirall, UCB, Kyowa Kirin and Leo Pharma. E.H.-A. has served as consultant and/or speaker with Leo Pharma, Novartis, Janssen, Lilly, Celgene and AbbVie. P.d.l.C. acted as a consultant and/or speaker for Janssen-Cilag, AbbVie, MSD, Pfizer, Novartis, Lilly, Almirall, UCB, Biogen, Celgene, Amgen, Sandoz, Sanofi and Leo Pharma. O.B.-R. acted as a consultant and/or speaker for Janssen-Cilag, AbbVie, Pfizer, Novartis, Lilly, Celgene, Leo Pharma, Amgen, Boehringer, UCB and Almirall. L.L.-E. participated as advisory board member and received educational grants from Janssen, AbbVie, MSD, Lilly, Novartis, LeoPharma and Pfizer. I.B. acted as a consultant and/or speaker for and/or participated in clinical trials sponsored by companies that manufacture drugs used for the treatment of psoriasis, including Janssen Pharmaceuticals Inc., Almirall SA, Lilly, AbbVie, Novartis, Celgene, Biogen Amgen, Leo Pharma, UCB, Pfizer-Wyeth and MSD. M.F. has participated as speaker and/or advisor for Janssen, Lilly, Novartis, Pfizer, MSD, AbbVie Celgene and Almirall. A.M. acted as consultant and/or speaker for AbbVie, Almirall, Celgene, Janssen, Leo Pharma, Lilly, Novartis. L.R. acted as a consultant and speaker for Janssen-Cilag, AbbVie, MSD, Pfizer, Novartis, Lilly, Almirall, Celgene and Leo Pharma. J.R.-M. acted as a consultant and/or speaker for and/or participated in clinical trials sponsored by AbbVie, Almirall, Janssen, Leo Pharma, Novartis, UCB, Pfizer, Lilly, Amgen and Boehringer Ingelheim. G.C. has been reimbursed by Janssen, AbbVie, Novartis, Pfizer, MSD and Celgene for advisory service and conference attendance. C.G.-D. participated as advisory board member for AbbVie, Almirall and speaker for Janssen, Lilly and Celgene. C.P.-M. acted as a consultant and/or speaker for Janssen-Cilag, AbbVie, MSD, Pfizer, Novartis, Lilly, Almirall, UCB, Celgene and Leo Pharma. E.D.A. has participated as a speaker and/or and/or PI/SI clinical trials sponsored by Amgen, Almirall, Janssen, Lilly, Leo Pharma, Novartis, UCB and AbbVie. J.A.S.-P. has served as consultant and/or speaker with Leo Pharma, Novartis, Janssen, Lilly, Celgene, AbbVie, Amgen, Sanofi, Almirall and Pfizer. D.P.R.-G. has been reimbursed by Pfizer, Janssen, Celgene, AbbVie, Novartis and LeoPharma for advisory services and conference attendance. I.G.D. received travel grants for congresses from AbbVie, MSD, Pfizer and Sanofi., (© The Author(s) 2023. Published by Oxford University Press on behalf of British Association of Dermatologists. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)