Browsing by Author "Dale, Russell C."

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    The 2021 European Alliance of Associations for Rheumatology/American College of Rheumatology points to consider for diagnosis and management of autoinflammatory type I interferonopathies: CANDLE/PRAAS, SAVI and AGS
    (BMJ, 2022) Cetin Gedik, Kader; Lamot, Lovro; Romano, Micol; Demirkaya, Erkan; Piskin, David; Torreggiani, Sofia; Adang, Laura A.; Armangue, Thais; Barchus, Kathe; Cordova, Devon R.; Crow, Yanick J.; Dale, Russell C.; Durrant, Karen L.; Eleftheriou, Despina; Fazzi, Elisa M.; Gattorno, Marco; Gavazzi, Francesco; Hanson, Eric P.; Lee-Kirsch, Min Ae; Montealegre Sanchez, Gina A.; Neven, Bénédicte; Orcesi, Simona; Ozen, Seza; Poli, M. Cecilia; Schumacher, Elliot; Tonduti, Davide; Uss, Katsiaryna; Aletaha, Daniel; Feldman, Brian M.; Vanderver, Adeline; Brogan, Paul A.; Goldbach-Mansky, Raphaela; Pediatrics, School of Medicine
    Objective: Autoinflammatory type I interferonopathies, chronic atypical neutrophilic dermatosis with lipodystrophy and elevated temperature/proteasome-associated autoinflammatory syndrome (CANDLE/PRAAS), stimulator of interferon genes (STING)-associated vasculopathy with onset in infancy (SAVI) and Aicardi-Goutières syndrome (AGS) are rare and clinically complex immunodysregulatory diseases. With emerging knowledge of genetic causes and targeted treatments, a Task Force was charged with the development of 'points to consider' to improve diagnosis, treatment and long-term monitoring of patients with these rare diseases. Methods: Members of a Task Force consisting of rheumatologists, neurologists, an immunologist, geneticists, patient advocates and an allied healthcare professional formulated research questions for a systematic literature review. Then, based on literature, Delphi questionnaires and consensus methodology, 'points to consider' to guide patient management were developed. Results: The Task Force devised consensus and evidence-based guidance of 4 overarching principles and 17 points to consider regarding the diagnosis, treatment and long-term monitoring of patients with the autoinflammatory interferonopathies, CANDLE/PRAAS, SAVI and AGS. Conclusion: These points to consider represent state-of-the-art knowledge to guide diagnostic evaluation, treatment and management of patients with CANDLE/PRAAS, SAVI and AGS and aim to standardise and improve care, quality of life and disease outcomes.
  • Thumbnail Image
    Item
    TNPO2 variants associate with human developmental delays, neurologic deficits, and dysmorphic features and alter TNPO2 activity in Drosophila
    (Elsevier, 2021) Goodman, Lindsey D.; Cope, Heidi; Nil, Zelha; Ravenscroft, Thomas A.; Charng, Wu-Lin; Lu, Shenzhao; Tien, An-Chi; Pfundt, Rolph; Koolen, David A.; Haaxma, Charlotte A.; Veenstra-Knol, Hermine E.; Klein Wassink-Ruiter, Jolien S.; Wevers, Marijke R.; Jones, Melissa; Walsh, Laurence E.; Klee, Victoria H.; Theunis, Miel; Legius, Eric; Steel, Dora; Barwick, Katy E.S.; Kurian, Manju A.; Mohammad, Shekeeb. S.; Dale, Russell C.; Terhal, Paulien A.; van Binsbergen, Ellen; Kirmse, Brian; Robinette, Bethany; Cogné, Benjamin; Isidor, Bertrand; Grebe, Theresa A.; Kulch, Peggy; Hainline, Bryan E.; Sapp, Katherine; Morava, Eva; Klee, Eric W.; Macke, Erica L.; Trapane, Pamela; Spencer, Christopher; Si, Yue; Begtrup, Amber; Moulton, Matthew J.; Dutta, Debdeep; Kanca, Oguz; Undiagnosed Diseases Network; Wangler, Michael F.; Yamamoto, Shinya; Bellen, Hugo J.; Tan, Queenie K.G.; Pediatrics, School of Medicine
    Transportin-2 (TNPO2) mediates multiple pathways including non-classical nucleocytoplasmic shuttling of >60 cargoes, such as developmental and neuronal proteins. We identified 15 individuals carrying de novo coding variants in TNPO2 who presented with global developmental delay (GDD), dysmorphic features, ophthalmologic abnormalities, and neurological features. To assess the nature of these variants, functional studies were performed in Drosophila. We found that fly dTnpo (orthologous to TNPO2) is expressed in a subset of neurons. dTnpo is critical for neuronal maintenance and function as downregulating dTnpo in mature neurons using RNAi disrupts neuronal activity and survival. Altering the activity and expression of dTnpo using mutant alleles or RNAi causes developmental defects, including eye and wing deformities and lethality. These effects are dosage dependent as more severe phenotypes are associated with stronger dTnpo loss. Interestingly, similar phenotypes are observed with dTnpo upregulation and ectopic expression of TNPO2, showing that loss and gain of Transportin activity causes developmental defects. Further, proband-associated variants can cause more or less severe developmental abnormalities compared to wild-type TNPO2 when ectopically expressed. The impact of the variants tested seems to correlate with their position within the protein. Specifically, those that fall within the RAN binding domain cause more severe toxicity and those in the acidic loop are less toxic. Variants within the cargo binding domain show tissue-dependent effects. In summary, dTnpo is an essential gene in flies during development and in neurons. Further, proband-associated de novo variants within TNPO2 disrupt the function of the encoded protein. Hence, TNPO2 variants are causative for neurodevelopmental abnormalities.