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2. Subcutaneous immunoglobulin for maintenance treatment in chronic inflammatory demyelinating polyneuropathy (PATH): a randomised, double-blind, placebo-controlled, phase 3 trial

Author

Sabet, A., George, K., Roberts, L., Carne, R., Blum, S., Henderson, R., Van Damme, P., Demeestere, J., Larue, S., D'Amour, C., Bril, V., Breiner, A., Kunc, P., Valis, M., Sussova, J., Kalous, T., Talab, R., Bednar, M., Toomsoo, T., Rubanovits, I., Gross-Paju, K., Sorro, U., Saarela, M., Auranen, M., Pouget, J., Attarian, S., Le Masson, G., Wielanek-Bachelet, A., Desnuelle, C., Delmont, E., Clavelou, P., Aufauvre, D., Schmidt, J., Zschuentssch, J., Sommer, C., Kramer, D., Hoffmann, O., Goerlitz, C., Haas, J., Chatzopoulos, M., Yoon, R., Gold, R., Berlit, P., Jaspert-Grehl, A., Liebetanz, D., Kutschenko, A., Stangel, M., Trebst, C., Baum, P., Bergh, F., Klehmet, J., Meisel, A., Klostermann, F., Oechtering, J., Lehmann, H., Schroeter, M., Hagenacker, T., Mueller, D., Sperfeld, A., Bethke, F., Drory, V., Algom, A., Yarnitsky, D., Murinson, B., Di Muzio, A., Ciccocioppo, F., Sorbi, S., Mata, S., Schenone, A., Grandis, M., Lauria, G., Cazzato, D., Antonini, G., Morino, S., Cocito, D., Zibetti, M., Yokota, T., Ohkubo, T., Kanda, T., Kawai, M., Kaida, K., Onoue, H., Kuwabara, S., Mori, M., Iijima, M., Ohyama, K., Baba, M., Tomiyama, M., Nishiyama, K., Akutsu, T., Yokoyama, K., Kanai, K., van Schaik, I.N., Eftimov, F., Notermans, N.C., Visser, N., Faber, C., Hoeijmakers, J., Rejdak, K., Chyrchel-Paszkiewicz, U., Casanovas Pons, C., Alberti Aguiló, M., Gamez, J., Figueras, M., Marquez Infante, C., Benitez Rivero, S., Lunn, M., Morrow, J., Gosal, D., Lavin, T., Melamed, I., Testori, A., Ajroud-Driss, S., Menichella, D., Simpson, E., Chi-Ho Lai, E., Dimachkie, M., Barohn, R.J., Beydoun, S., Johl, H., Lange, D., Shtilbans, A., Muley, S., Ladha, S., Freimer, M., Kissel, J., Latov, N., Chin, R., Ubogu, E., Mumfrey, S., Rao, T., MacDonald, P., Sharma, K., Gonzalez, G., Allen, J., Walk, D., Hobson-Webb, L., Gable, K., van Schaik, Ivo N, Bril, Vera, van Geloven, Nan, Hartung, Hans-Peter, Lewis, Richard A, Sobue, Gen, Lawo, John-Philip, Praus, Michaela, Mielke, Orell, Durn, Billie L, Cornblath, David R, and Merkies, Ingemar S J

Published
2018
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4. P.03 Myosin dysregulation in nemaline myopathy

Author

Laitila, J., primary, Ranu, N., additional, Mariano, J., additional, Wallgren-Pettersson, C., additional, Witting, N., additional, Vissing, J., additional, Vilchez, J., additional, Fiorillo, C., additional, Zanoteli, E., additional, Auranen, M., additional, Jokela, M., additional, Beck, T., additional, Larsen, S., additional, Kontrogianni-Konstantopoulos, A., additional, and Ochala, J., additional

Published
2022
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5. NEB mutations disrupt the super-relaxed state of myosin and remodel the muscle metabolic proteome in nemaline myopathy

Author

Ranu, N., Laitila, J., Dugdale, H.F., Mariano, J., Kolb, J.S., Wallgren-Pettersson, C., Witting, N., Vissing, J., Vilchez, J.J., Fiorillo, C., Zanoteli, E., Auranen, M., Jokela, M., Tasca, G., Claeys, K.G., Voermans, N.C., Palmio, J., Huovinen, S., Moggio, M., Beck, T.N., Kontrogianni-Konstantopoulos, A., Granzier, H., Ochala, J., Ranu, N., Laitila, J., Dugdale, H.F., Mariano, J., Kolb, J.S., Wallgren-Pettersson, C., Witting, N., Vissing, J., Vilchez, J.J., Fiorillo, C., Zanoteli, E., Auranen, M., Jokela, M., Tasca, G., Claeys, K.G., Voermans, N.C., Palmio, J., Huovinen, S., Moggio, M., Beck, T.N., Kontrogianni-Konstantopoulos, A., Granzier, H., and Ochala, J.

Abstract

Item does not contain fulltext, Nemaline myopathy (NM) is one of the most common non-dystrophic genetic muscle disorders. NM is often associated with mutations in the NEB gene. Even though the exact NEB-NM pathophysiological mechanisms remain unclear, histological analyses of patients' muscle biopsies often reveal unexplained accumulation of glycogen and abnormally shaped mitochondria. Hence, the aim of the present study was to define the exact molecular and cellular cascade of events that would lead to potential changes in muscle energetics in NEB-NM. For that, we applied a wide range of biophysical and cell biology assays on skeletal muscle fibres from NM patients as well as untargeted proteomics analyses on isolated myofibres from a muscle-specific nebulin-deficient mouse model. Unexpectedly, we found that the myosin stabilizing conformational state, known as super-relaxed state, was significantly impaired, inducing an increase in the energy (ATP) consumption of resting muscle fibres from NEB-NM patients when compared with controls or with other forms of genetic/rare, acquired NM. This destabilization of the myosin super-relaxed state had dynamic consequences as we observed a remodeling of the metabolic proteome in muscle fibres from nebulin-deficient mice. Altogether, our findings explain some of the hitherto obscure hallmarks of NM, including the appearance of abnormal energy proteins and suggest potential beneficial effects of drugs targeting myosin activity/conformations for NEB-NM.

Published
2022

8. 264P A nationwide register study on the epidemiology of Duchenne muscular dystrophy (DMD) in Finland.

Author

Auranen, M., Kyttälä, M., Vesikansa, A., Mehtälä, J., Isohanni, P., and Kosunen, M.

Subjects
*DUCHENNE muscular dystrophy, *ELECTRONIC health records, *MUSCULAR dystrophy, *HOSPITAL admission & discharge, *MEDICAL care
Abstract

Although Duchenne muscular dystrophy (DMD) is the most common muscle disease beginning in early childhood, epidemiological studies on the disease are limited. This retrospective register study assessed the incidence and prevalence of DMD, and mortality of patients with DMD in Finland. The study population was identified from the nationwide Care Register for Health Care (Hilmo) maintained by the Finnish Institute for Health and Welfare (THL). Analyses included all male patients who had a DMD diagnosis (ICD-10: G71.06) recorded between 1996–2022 (inclusion period) and who were <18 years of age at the time of incident DMD diagnosis. Individual-level data on diagnoses and operations were collected from Hilmo and Register of Primary Care Visits maintained by THL and dates and causes of death from the Cause of Death Register maintained by Statistics Finland. Data on muscular dystrophy diagnoses (ICD-9: 359.1) between 1987–1995 were collected from the Hospital Discharge Register maintained by the THL. Additional information about DMD -gene mutations and patients' functional status were collected from electronic health records. Data were analyzed using descriptive statistics. The nationwide study included 250 DMD patients, of which 151 were incident cases. Median age at incident diagnosis was 5.6 years (interquartile range [IQR], 4.0–8.6) for all patients and 5.3 years (IQR, 3.9–7.3) for incident cases. Mean annual incidence of DMD was 0.10 per 100,000 residents (standard deviation (SD), 0.05) and mean annual prevalence 2.46 per 100,000 residents (SD, 0.13). Median age at first respiratory intervention was 21.2 years (IQR, 13.0–25.2). During the study period, 116 patients (46.4%) died at a median age of 24.6 years (IQR, 21.3–28.6). Most common causes of death were muscle dystrophy, pneumonia, and dilated cardiomyopathy. This study provides unprecedented data into the epidemiology of DMD in Finland with insights into the disease's trajectory in a real-world context. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Efficacy and safety of IVIG in CIDP: Combined data of the PRIMA and PATH studies

Author

Merkies, Ingemar S. J., van Schaik, Ivo N., Léger, Jean-Marc, Bril, Vera, van Geloven, Nan, Hartung, Hans-Peter, Lewis, Richard A., Sobue, Gen, Lawo, John-Philip, Durn, Billie L., Cornblath, David R., De Bleecker, Jan L., Sommer, Claudia, Robberecht, Wim, Saarela, Mika, Kamienowski, Jerzy, Stelmasiak, Zbigniew, Tackenberg, Björn, Mielke, Orell, Sabet, A., George, K., Roberts, L., Carne, R., Blum, S., Henderson, R., Van Damme, P., Demeestere, J., Larue, S., D'Amour, C., Kunc, P., Valis, M., Sussova, J., Kalous, T., Talab, R., Bednar, M., Toomsoo, T., Rubanovits, I., Gross-Paju, K., Sorro, U., Saarela, M., Auranen, M., Pouget, J., Attarian, S., Masson, G. Le, Wielanek-Bachelet, A., Desnuelle, C., Delmont, E., Clavelou, P., Aufauvre, D., Schmidt, J., Zschuentzsch, J., Sommer, C., Kramer, D., Hoffmann, O., Goerlitz, C., Haas, J., Chatzopoulos, M., Yoon, R., Gold, R., Berlit, P., Jaspert-Grehl, A., Liebetanz, D., Kutschenko, A., Stangel, M., Trebst, C., Baum, P., Bergh, F., Klehmet, J., Meisel, A., Klostermann, F., Oechtering, J., Lehmann, H., Schroeter, M., Hagenacker, T., Mueller, D., Sperfeld, A., Bethke, F., Drory, V., Algom, A., Yarnitsky, D., Murinson, B., Di Muzio, A., Ciccocioppo, F., Sorbi, S., Mata, S., Schenone, A., Grandis, M., Lauria, G., Cazzato, D., Antonini, G., Morino, S., Cocito, D., Zibetti, M., Yokota, T., Ohkubo, T., Kanda, T., Kawai, M., Kaida, K., Onoue, H., Kuwabara, S., Mori, M., Iijima, M., Ohyama, K., Baba, M., Tomiyama, M., Nishiyama, K., Akutsu, T., Yokoyama, K., Kanai, K., van Schaik, I. N., Eftimov, F., Notermans, N. C., Visser, N., Faber, C., Hoeijmakers, J., Rejdak, K., Chyrchel-Paszkiewicz, U., Casanovas Pons, C., Antonia, M., Gamez, J., Salvado, M., Infante, C. Marquez, Benitez, S., Lunn, M., Morrow, J., Gosal, D., Lavin, T., Melamed, I., Testori, A., Ajroud-Driss, S., Menichella, D., Simpson, E., Lai, E. Chi-Ho, Dimachkie, M., Barohn, R. J., Beydoun, S., Johl, H., Lange, D., Shtilbans, A., Muley, S., Ladha, S., Freimer, M., Kissel, J., Latov, N., Chin, R., Ubogu, E., Mumfrey, S., Rao, T., Macdonald, P., Sharma, K., Gonzalez, G., Allen, J., Walk, D., Hobson-Webb, L., Gable, K., De Bleecker, J. L., Robberecht, W., Franques, J., Léger, J. -M., Morales, R. Juntas, Nguento, A., Schrey, Ch., Kamienowski, J., Stelmasiak, Z., Zwolińska, G., Neurology, AII - Infectious diseases, ANS - Neuroinfection & -inflammation, CSL Behring, Neurologian yksikkö, Clinicum, Department of Food and Nutrition, and HUS Neurocenter

Subjects
Research Report, Male, Outcome Assessment, efficacy, Medizin, Chronic inflammatory demyelinating polyneuropathy, CIDP, IVIG, PATH, PRIMA, Neuroscience (all), Neurology (clinical), INFLAMMATORY DEMYELINATING POLYNEUROPATHY, 3124 Neurology and psychiatry, law.invention, Grip strength, 0302 clinical medicine, Randomized controlled trial, law, Interquartile range, hemic and lymphatic diseases, Outcome Assessment, Health Care, 80 and over, Medicine and Health Sciences, Prospective Studies, Chronic Inflammatory Demyelinating, Prospective cohort study, Aged, 80 and over, education.field_of_study, General Neuroscience, Immunoglobulins, Intravenous, Middle Aged, OPEN-LABEL, humanities, 3. Good health, PREVALENCE, Europe, 030220 oncology & carcinogenesis, Cohort, POLYRADICULONEUROPATHY, Female, Intravenous, Polyneuropathy, Life Sciences & Biomedicine, Adult, medicine.medical_specialty, Efficacy, Neuroscience(all), Population, Clinical Neurology, Immunoglobulins, MAINTENANCE TREATMENT, 03 medical and health sciences, Young Adult, Double-Blind Method, Internal medicine, medicine, Journal Article, Humans, Immunologic Factors, INTRAVENOUS IMMUNOGLOBULIN, Aged, Polyradiculoneuropathy, Chronic Inflammatory Demyelinating, education, Science & Technology, business.industry, Neurosciences, 3112 Neurosciences, Research Reports, medicine.disease, PHASE-III, Health Care, cidp, ivig, path, prima, Neurosciences & Neurology, business, 030217 neurology & neurosurgery
Abstract

PRIMA Trial Investigators and the PATH Study Group., Intravenous immunoglobulin (IVIG) is a potential therapy for chronic inflammatory demyelinating polyneuropathy (CIDP). To investigate the efficacy and safety of the IVIG IgPro10 (Privigen) for treatment of CIDP, results from Privigen Impact on Mobility and Autonomy (PRIMA), a prospective, open‐label, single‐arm study of IVIG in immunoglobulin (Ig)‐naïve or IVIG pre‐treated subjects (NCT01184846, n = 28) and Polyneuropathy And Treatment with Hizentra (PATH), a double‐blind, randomized study including an open‐label, single‐arm IVIG phase in IVIG pre‐treated subjects (NCT01545076, IVIG restabilization phase n = 207) were analyzed separately and together (n = 235). Efficacy assessments included change in adjusted inflammatory neuropathy cause and treatment (INCAT) score, grip strength and Medical Research Council (MRC) sum score. Adverse drug reactions (ADRs) and ADRs/infusion were recorded. Adjusted INCAT response rate was 60.7% in all PRIMA subjects at Week 25 (76.9% in IVIG pre‐treated subjects) and 72.9% in PATH. In the pooled cohort (n = 235), INCAT response rate was 71.5%; median time to INCAT improvement was 4.3 weeks. No clear demographic differences were noticed between early (responding before Week 7, n = 148) and late responders (n = 21). In the pooled cohort, median change from baseline to last observation was −1.0 (interquartile range −2.0; 0.0) point for INCAT score; +8.0 (0.0; 20.0) kPa for maximum grip strength; +3.0 (1.0; 7.0) points for MRC sum score. In the pooled cohort, 271 ADRs were reported in 105 subjects (44.7%), a rate of 0.144 ADRs per infusion. This analysis confirms the efficacy and safety of IgPro10, a recently FDA‐approved IVIG for CIDP, in a population of mainly pre‐treated subjects with CIDP [Correction added on 14 March 2019 after first online publication: the INCAT response rate has been corrected.].

Published
2019

10. Diagnostic value of serum biomarkers FGF21 and GDF15 compared to muscle sample in mitochondrial disease

Author

Keinänen-Kiukaanniemi, S. (Sirkka), Auranen, M. (Mari), Darin, N. (Niklas), Sofou, K. (Kalliopi), Bindoff, L. (Laurence), Hikmat, O. (Omar), Uusimaa, J. (Johanna), Vieira, P. (Päivi), Tulinius, M. (Már), Lönnqvist, T. (Tuula), de Coo, I. F. (Irenaeus F.), Suomalainen, A. (Anu), Isohanni, P. (Pirjo), Keinänen-Kiukaanniemi, S. (Sirkka), Auranen, M. (Mari), Darin, N. (Niklas), Sofou, K. (Kalliopi), Bindoff, L. (Laurence), Hikmat, O. (Omar), Uusimaa, J. (Johanna), Vieira, P. (Päivi), Tulinius, M. (Már), Lönnqvist, T. (Tuula), de Coo, I. F. (Irenaeus F.), Suomalainen, A. (Anu), and Isohanni, P. (Pirjo)

Abstract

The aim of this study was to compare the value of serum biomarkers, fibroblast growth factor 21 (FGF21) and growth differentiation factor 15 (GDF15), with histological analysis of muscle in the diagnosis of mitochondrial disease. We collected 194 serum samples from patients with a suspected or known mitochondrial disease. Biomarkers were analyzed blinded using enzyme-labeled immunosorbent assay. Clinical data were collected using a structured questionnaire. Only 39% of patients with genetically verified mitochondrial disease had mitochondrial pathology in their muscle histology. In contrast, biomarkers were elevated in 62% of patients with genetically verified mitochondrial disease. Those with both biomarkers elevated had a muscle manifesting disorder and a defect affecting mitochondrial DNA expression. If at least one of the biomarkers was induced and the patient had a myopathic disease, a mitochondrial DNA expression disease was the cause with 94% probability. Among patients with biomarker analysis and muscle biopsy taken <12 months apart, a mitochondrial disorder would have been identified in 70% with analysis of FGF21 and GDF15 compared to 50% of patients whom could have been identified with muscle biopsy alone. Muscle findings were nondiagnostic in 72% (children) and 45% (adults). Induction of FGF21 and GDF15 suggest a mitochondrial etiology as an underlying cause of a muscle manifesting disease. Normal biomarker values do not, however, rule out a mitochondrial disorder, especially if the disease does not manifest in muscle. We suggest that FGF21 and GDF15 together should be first-line diagnostic investigations in mitochondrial disease complementing muscle biopsy.

Published
2021

11. Shape Coexistence at Zero Spin in Ni 64 Driven by the Monopole Tensor Interaction

Author

N. Mărginean, D. Little, Y. Tsunoda, S. Leoni, R. V. F. Janssens, B. Fornal, T. Otsuka, C. Michelagnoli, L. Stan, F. C. L. Crespi, C. Costache, R. Lica, M. Sferrazza, A. Turturica, A. D. Ayangeakaa, K. Auranen, M. Barani, P. C. Bender, S. Bottoni, M. Boromiza, A. Bracco, S. Călinescu, C. M. Campbell, M. P. Carpenter, P. Chowdhury, M. Ciemała, N. Cieplicka-Oryǹczak, D. Cline, C.

Published
2020
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13. Long-term safety and efficacy of subcutaneous immunoglobulin IgPro20 in CIDP: PATH extension study

Author

van Schaik, Ivo N, Mielke, Orell, Bril, Vera, van Geloven, Nan, Hartung, Hans-Peter, Lewis, Richard A, Sobue, Gen, Lawo, John-Philip, Praus, Michaela, Durn, Billie L, Cornblath, David R, Merkies, Ingemar SJ, Sabet, A, George, K, Roberts, L, Carne, R, Blum, S, Henderson, R, Van Damme, P, Demeestere, J, Larue, S, D'Amour, C, Bril, V, Breiner, A, Kunc, P, Michal, V, Sussova, J, Tomas, K, Talab, R, Michal, B, Toomsoo, T, Rubanovits, I, Gross-Paju, K, Sorro, U, Saarela, M, Auranen, M, Pouget, J, Attarian, S, Le Masson, G, Wielanek-Bachelet, A, Desnuelle, C, Delmont, E, Clavelou, P, Aufauvre, D, Schmidt, J, Zschumtszsch, J, Sommer, C, Kramer, D, Hoffmann, O, Goerlitz, C, Haas, J, Chatzopoulos, M, Yoon, R, Gold, R, Berlit, P, Jaspert-Grehl, A, Liebetanz, D, Kutschenko, A, Stangel, M, Trebst, C, Baum, P, Bergh, F, Klehmet, J, Meisel, A, Klostermann, F, Oechtering, J, Lehmann, H, Schroeter, M, Hagenacker, T, Mueller, D, Sperfeld, A, Bethke, F, Drory, V, Algom, A, Yarnitsky, D, Murinson, B, Di Muzio, A, Ciccocioppo, F, Sorbi, S, Mata, S, Schenone, A, Grandis, M, Lauria, G, Cazzato, D, Antonini, G, Morino, S, Cocito, D, Zibetti, M, Yokota, T, Ohkubo, T, Kanda, T, Kawai, M, Kaida, K, Onoue, H, Kuwabara, S, Mori, M, Iijima, M, Ohyama, K, Baba, M, Tomiyama, M, Nishiyama, K, Akutsu, T, Yokoyama, K, Kanai, K, van Schaik, IN, Eftimov, F, Notermans, NC, Visser, N, Faber, C, Hoeijmakers, J, Rejdak, K, Chyrchel-Paszkiewicz, U, Casanovas Pons, C, Antonia, M, Gamez, J, Salvado, M, Marquez Infante, C, Benitez, S, Lunn, M, Morrow, J, Gosal, D, Lavin, T, Melamed, I, Testori, A, Ajroud-Driss, S, Menichella, D, Simpson, E, Lai, E Chi-Ho, Dimachkie, M, Barohn, RJ, Beydoun, S, Johl, H, Lange, D, Shtilbans, A, Muley, S, Ladha, S, Freimer, M, Kissel, J, Latov, N, Chin, R, Ubogu, E, Mumfrey, S, Rao, T, MacDonald, P, Sharma, K, Gonzalez, G, Allen, J, Walk, D, Hobson-Webb, L, Gable, K, Klinische Neurowetenschappen, MUMC+: MA Med Staf Spec Neurologie (9), RS: MHeNs - R1 - Cognitive Neuropsychiatry and Clinical Neuroscience, Hagenacker, Tim (Beitragende*r), HUS Neurocenter, Neurologian yksikkö, Clinicum, Department of Neurosciences, Academic Medical Center, and CSL Behring

Subjects
Adult, Male, medicine.medical_specialty, Time Factors, Injections, Subcutaneous, Medizin, Chronic inflammatory demyelinating polyneuropathy, Subcutaneous immunoglobulin, INFLAMMATORY DEMYELINATING POLYNEUROPATHY, Gastroenterology, 3124 Neurology and psychiatry, law.invention, 03 medical and health sciences, MUSCLE STRENGTH, 0302 clinical medicine, Randomized controlled trial, law, Internal medicine, Humans, Medicine, Prospective Studies, Dosing, Adverse effect, Prospective cohort study, Aged, 030304 developmental biology, 0303 health sciences, MMN, business.industry, Extension study, 3112 Neurosciences, Immunoglobulins, Intravenous, Polyradiculoneuropathy, Middle Aged, medicine.disease, 3. Good health, Treatment Outcome, Polyradiculoneuropathy, Chronic Inflammatory Demyelinating, Neurology, Immunoglobulin G, Female, Neurology (clinical), business, 030217 neurology & neurosurgery, Follow-Up Studies
Abstract

PATH study group., [Objective] To investigate the long-term safety and efficacy of weekly subcutaneous IgPro20 (Hizentra, CSL Behring) in chronic inflammatory demyelinating polyneuropathy (CIDP)., [Methods] In a 48-week open-label prospective extension study to the PATH study, patients were initially started on 0.2 g/kg or on 0.4 g/kg weekly and—if clinically stable—switched to 0.2 g/kg weekly after 24 weeks. Upon CIDP relapse on the 0.2 g/kg dose, 0.4 g/kg was (re)initiated. CIDP relapse was defined as a deterioration by at least 1 point in the total adjusted Inflammatory Neuropathy Cause and Treatment score., [Results] Eighty-two patients were enrolled. Sixty-two patients initially received 0.4 g/kg, 20 patients 0.2 g/kg weekly. Seventy-two received both doses during the study. Sixty-six patients (81%) completed the 48-week study duration. Overall relapse rates were 10% in 0.4 g/kg–treated patients and 48% in 0.2 g/kg–treated patients. After dose reduction from 0.4 to 0.2 g/kg, 51% (27/53) of patients relapsed, of whom 92% (24 of 26) improved after reinitiation of the 0.4 g/kg dose. Two-thirds of patients (19/28) who completed the PATH study without relapse remained relapse-free on the 0.2 g/kg dose after dose reduction in the extension study. Sixty-two patients had adverse events (AEs) (76%), of which most were mild or moderate with no related serious AEs., [Conclusions] Subcutaneous treatment with IgPro20 provided long-term benefit at both 0.4 and 0.2 g/kg weekly doses with lower relapse rates on the higher dose. Long-term dosing should be individualized to find the most appropriate dose in a given patient. Classification of evidence This study provides Class IV evidence that for patients with CIDP, long-term treatment with SCIG beyond 24 weeks is safe and efficacious., This study was supported by CSL Behring.

Published
2019

15. Restabilization treatment after intravenous immunoglobulin withdrawal in chronic inflammatory demyelinating polyneuropathy: Results from the pre-randomization phase of the Polyneuropathy And Treatment with Hizentra study

Author

Mielke, Orell, Bril, Vera, Cornblath, David R., Lawo, John-Philip, van Geloven, Nan, Hartung, Hans-Peter, Lewis, Richard A., Merkies, Ingemar S. J., Sobue, Gen, Durn, Billie, Shebl, Amgad, van Schaik, Ivo N., Sabet, A., George, K., Roberts, L., Carne, R., Blum, S., Henderson, R., Van Damme, P., Demeestere, J., Larue, S., D'Amour, C., Kunc, P., Valis, M., Sussova, J., Kalous, T., Talab, R., Bednar, M., Toomsoo, T., Rubanovits, I., Gross-Paju, K., Sorro, U., Saarela, M., Auranen, M., Pouget, J., Attarian, S., Le Masson, G., Wielanek-Bachelet, A., Desnuelle, C., Delmont, E., Clavelou, P., Aufauvre, D., Schmidt, J., Zschuentzsch, J., Sommer, C., Kramer, D., Hoffmann, O., Goerlitz, C., Haas, J., Chatzopoulos, M., Yoon, R., Gold, R., Berlit, P., Jaspert-Grehl, A., Liebetanz, D., Kutschenko, A., Stangel, M., Trebst, C., Baum, P., Bergh, F., Klehmet, J., Meisel, A., Klostermann, F., Oechtering, J., Lehmann, H., Schroeter, M., Hagenacker, T., Mueller, D., Sperfeld, A., Bethke, F., Drory, V., Algom, A., Yarnitsky, D., Murinson, B., Di Muzio, A., Ciccocioppo, F., Sorbi, S., Mata, S., Schenone, A., Grandis, M., Lauria, G., Cazzato, D., Antonini, G., Morino, S., Cocito, D., Zibetti, M., Yokota, T., Ohkubo, T., Kanda, T., Kawai, M., Kaida, K., Onoue, H., Kuwabara, S., Mori, M., Iijima, M., Ohyama, K., Baba, M., Tomiyama, M., Nishiyama, K., Akutsu, T., Yokoyama, K., Kanai, K., van Schaik, I. N., Eftimov, F., Notermans, N. C., Visser, N., Faber, C., Hoeijmakers, J., Rejdak, K., Chyrchel-Paszkiewicz, U., Casanovas Pons, C., Antonia, M., Gamez, J., Salvado, M., Marquez Infante, C., Benitez, S., Lunn, M., Morrow, J., Gosal, D., Lavin, T., Melamed, I., Testori, A., Ajroud-Driss, S., Menichella, D., Simpson, E., Lai, E. Chi-Ho, Dimachkie, M., Barohn, R. J., Beydoun, S., Johl, H., Lange, D., Shtilbans, A., Muley, S., Ladha, S., Freimer, M., Kissel, J., Latov, N., Chin, R., Ubogu, E., Mumfrey, S., Rao, T., MacDonald, P., Sharma, K., Gonzalez, G., Allen, J., Walk, D., Hobson-Webb, L., Gable, K., Mielke, Orell, Bril, Vera, Cornblath, David R., Lawo, John-Philip, van Geloven, Nan, Hartung, Hans-Peter, Lewis, Richard A., Merkies, Ingemar S. J., Sobue, Gen, Durn, Billie, Shebl, Amgad, van Schaik, Ivo N., Sabet, A., George, K., Roberts, L., Carne, R., Blum, S., Henderson, R., Van Damme, P., Demeestere, J., Larue, S., D'Amour, C., Kunc, P., Valis, M., Sussova, J., Kalous, T., Talab, R., Bednar, M., Toomsoo, T., Rubanovits, I., Gross-Paju, K., Sorro, U., Saarela, M., Auranen, M., Pouget, J., Attarian, S., Le Masson, G., Wielanek-Bachelet, A., Desnuelle, C., Delmont, E., Clavelou, P., Aufauvre, D., Schmidt, J., Zschuentzsch, J., Sommer, C., Kramer, D., Hoffmann, O., Goerlitz, C., Haas, J., Chatzopoulos, M., Yoon, R., Gold, R., Berlit, P., Jaspert-Grehl, A., Liebetanz, D., Kutschenko, A., Stangel, M., Trebst, C., Baum, P., Bergh, F., Klehmet, J., Meisel, A., Klostermann, F., Oechtering, J., Lehmann, H., Schroeter, M., Hagenacker, T., Mueller, D., Sperfeld, A., Bethke, F., Drory, V., Algom, A., Yarnitsky, D., Murinson, B., Di Muzio, A., Ciccocioppo, F., Sorbi, S., Mata, S., Schenone, A., Grandis, M., Lauria, G., Cazzato, D., Antonini, G., Morino, S., Cocito, D., Zibetti, M., Yokota, T., Ohkubo, T., Kanda, T., Kawai, M., Kaida, K., Onoue, H., Kuwabara, S., Mori, M., Iijima, M., Ohyama, K., Baba, M., Tomiyama, M., Nishiyama, K., Akutsu, T., Yokoyama, K., Kanai, K., van Schaik, I. N., Eftimov, F., Notermans, N. C., Visser, N., Faber, C., Hoeijmakers, J., Rejdak, K., Chyrchel-Paszkiewicz, U., Casanovas Pons, C., Antonia, M., Gamez, J., Salvado, M., Marquez Infante, C., Benitez, S., Lunn, M., Morrow, J., Gosal, D., Lavin, T., Melamed, I., Testori, A., Ajroud-Driss, S., Menichella, D., Simpson, E., Lai, E. Chi-Ho, Dimachkie, M., Barohn, R. J., Beydoun, S., Johl, H., Lange, D., Shtilbans, A., Muley, S., Ladha, S., Freimer, M., Kissel, J., Latov, N., Chin, R., Ubogu, E., Mumfrey, S., Rao, T., MacDonald, P., Sharma, K., Gonzalez, G., Allen, J., Walk, D., Hobson-Webb, L., and Gable, K.

Abstract

In patients with chronic inflammatory demyelinating polyneuropathy (CIDP), intravenous immunoglobulin (IVIG) is recommended to be periodically reduced to assess the need for ongoing therapy. However, little is known about the effectiveness of restabilization with IVIG in patients who worsen after IVIG withdrawal. In the Polyneuropathy And Treatment with Hizentra (PATH) study, the pre-randomization period included sudden stopping of IVIG followed by 12 weeks of observation. Those deteriorating were then restabilized with IVIG. Of 245 subjects who stopped IVIG, 28 did not show signs of clinical deterioration within 12 weeks. Two hundred and seven received IVIG restabilization with an induction dose of 2 g/kg bodyweight (bw) IgPro10 (Privigen, CSL Behring, King of Prussia, Pennsylvania) and maintenance doses of 1 g/kg bw every 3 weeks for up to 13 weeks. Signs of clinical improvement were seen in almost all (n = 188; 91%) subjects. During IVIG restabilization, 35 subjects either did not show CIDP stability (n = 21, analyzed as n = 22 as an additional subject was randomized in error) or withdrew for other reasons (n = 14). Of the 22 subjects who did not achieve clinical stability, follow-up information in 16 subjects after an additional 4 weeks was obtained. Nine subjects were reported to have improved, leaving a maximum of 27 subjects (13%) who either showed no signs of clinical improvement during the restabilization phase and 4 weeks post-study or withdrew for other reasons. In conclusion, sudden IVIG withdrawal was effective in detecting ongoing immunoglobulin G dependency with a small risk for subjects not returning to their baseline 17 weeks after withdrawal.

Published
2019

16. Long-term safety and efficacy of subcutaneous immunoglobulin IgPro20 in CIDP PATH extension study

Author

van Schaik, Ivo N., Mielke, Orell, Bril, Vera, van Geloven, Nan, Hartung, Hans-Peter, Lewis, Richard A., Sobue, Gen, Lawo, John-Philip, Praus, Michaela, Durn, Billie L., Cornblath, David R., Merkies, Ingemar S. J., Sabet, A., George, K., Roberts, L., Carne, R., Blum, S., Henderson, R., Van Damme, P., Demeestere, J., Larue, S., D'Amour, C., Bril, V, Breiner, A., Kunc, P., Michal, V, Sussova, J., Tomas, K., Talab, R., Michal, B., Toomsoo, T., Rubanovits, I, Gross-Paju, K., Sorro, U., Saarela, M., Auranen, M., Pouget, J., Attarian, S., Le Masson, G., Wielanek-Bachelet, A., Desnuelle, C., Delmont, E., Clavelou, P., Aufauvre, D., Schmidt, J., Zschumtszsch, J., Sommer, C., Kramer, D., Hoffmann, O., Goerlitz, C., Haas, J., Chatzopoulos, M., Yoon, R., Gold, R., Berlit, P., Jaspert-Grehl, A., Liebetanz, D., Kutschenko, A., Stangel, M., Trebst, C., Baum, P., Bergh, F., Klehmet, J., Meisel, A., Klostermann, F., Oechtering, J., Lehmann, H., Schroeter, M., Hagenacker, T., Mueller, D., Sperfeld, A., Bethke, F., Drory, V, Algom, A., Yarnitsky, D., Murinson, B., Di Muzio, A., Ciccocioppo, F., Sorbi, S., Mata, S., Schenone, A., Grandis, M., Lauria, G., Cazzato, D., Antonini, G., Morino, S., Cocito, D., Zibetti, M., Yokota, T., Ohkubo, T., Kanda, T., Kawai, M., Kaida, K., Onoue, H., Kuwabara, S., Mori, M., Iijima, M., Ohyama, K., Baba, M., Tomiyama, M., Nishiyama, K., Akutsu, T., Yokoyama, K., Kanai, K., van Schaik, I. N., Eftimov, F., Notermans, N. C., Visser, N., Faber, C., Hoeijmakers, J., Rejdak, K., Chyrchel-Paszkiewicz, U., Casanovas Pons, C., Antonia, M., Gamez, J., Salvado, M., Marquez Infante, C., Benitez, S., Lunn, M., Morrow, J., Gosal, D., Lavin, T., Melamed, I, Testori, A., Ajroud-Driss, S., Menichella, D., Simpson, E., Lai, E. Chi-Ho, Dimachkie, M., Barohn, R. J., Beydoun, S., Johl, H., Lange, D., Shtilbans, A., Muley, S., Ladha, S., Freimer, M., Kissel, J., Latov, N., Chin, R., Ubogu, E., Mumfrey, S., Rao, T., MacDonald, P., Sharma, K., Gonzalez, G., Allen, J., Walk, D., Hobson-Webb, L., Gable, K., van Schaik, Ivo N., Mielke, Orell, Bril, Vera, van Geloven, Nan, Hartung, Hans-Peter, Lewis, Richard A., Sobue, Gen, Lawo, John-Philip, Praus, Michaela, Durn, Billie L., Cornblath, David R., Merkies, Ingemar S. J., Sabet, A., George, K., Roberts, L., Carne, R., Blum, S., Henderson, R., Van Damme, P., Demeestere, J., Larue, S., D'Amour, C., Bril, V, Breiner, A., Kunc, P., Michal, V, Sussova, J., Tomas, K., Talab, R., Michal, B., Toomsoo, T., Rubanovits, I, Gross-Paju, K., Sorro, U., Saarela, M., Auranen, M., Pouget, J., Attarian, S., Le Masson, G., Wielanek-Bachelet, A., Desnuelle, C., Delmont, E., Clavelou, P., Aufauvre, D., Schmidt, J., Zschumtszsch, J., Sommer, C., Kramer, D., Hoffmann, O., Goerlitz, C., Haas, J., Chatzopoulos, M., Yoon, R., Gold, R., Berlit, P., Jaspert-Grehl, A., Liebetanz, D., Kutschenko, A., Stangel, M., Trebst, C., Baum, P., Bergh, F., Klehmet, J., Meisel, A., Klostermann, F., Oechtering, J., Lehmann, H., Schroeter, M., Hagenacker, T., Mueller, D., Sperfeld, A., Bethke, F., Drory, V, Algom, A., Yarnitsky, D., Murinson, B., Di Muzio, A., Ciccocioppo, F., Sorbi, S., Mata, S., Schenone, A., Grandis, M., Lauria, G., Cazzato, D., Antonini, G., Morino, S., Cocito, D., Zibetti, M., Yokota, T., Ohkubo, T., Kanda, T., Kawai, M., Kaida, K., Onoue, H., Kuwabara, S., Mori, M., Iijima, M., Ohyama, K., Baba, M., Tomiyama, M., Nishiyama, K., Akutsu, T., Yokoyama, K., Kanai, K., van Schaik, I. N., Eftimov, F., Notermans, N. C., Visser, N., Faber, C., Hoeijmakers, J., Rejdak, K., Chyrchel-Paszkiewicz, U., Casanovas Pons, C., Antonia, M., Gamez, J., Salvado, M., Marquez Infante, C., Benitez, S., Lunn, M., Morrow, J., Gosal, D., Lavin, T., Melamed, I, Testori, A., Ajroud-Driss, S., Menichella, D., Simpson, E., Lai, E. Chi-Ho, Dimachkie, M., Barohn, R. J., Beydoun, S., Johl, H., Lange, D., Shtilbans, A., Muley, S., Ladha, S., Freimer, M., Kissel, J., Latov, N., Chin, R., Ubogu, E., Mumfrey, S., Rao, T., MacDonald, P., Sharma, K., Gonzalez, G., Allen, J., Walk, D., Hobson-Webb, L., and Gable, K.

Abstract

Objective To investigate the long-term safety and efficacy of weekly subcutaneous IgPro20 (Hizentra, CSL Behring) in chronic inflammatory demyelinating polyneuropathy (CIDP). Methods In a 48-week open-label prospective extension study to the PATH study, patients were initially started on 0.2 g/kg or on 0.4 g/kg weekly and-if clinically stable-switched to 0.2 g/kg weekly after 24 weeks. Upon CIDP relapse on the 0.2 g/kg dose, 0.4 g/kg was (re)initiated. CIDP relapse was defined as a deterioration by at least 1 point in the total adjusted Inflammatory Neuropathy Cause and Treatment score. Results Eighty-two patients were enrolled. Sixty-two patients initially received 0.4 g/kg, 20 patients 0.2 g/kg weekly. Seventy-two received both doses during the study. Sixty-six patients (81%) completed the 48-week study duration. Overall relapse rates were 10% in 0.4 g/kg-treated patients and 48% in 0.2 g/kg-treated patients. After dose reduction from 0.4 to 0.2 g/kg, 51% (27/53) of patients relapsed, of whom 92% (24 of 26) improved after reinitiation of the 0.4 g/kg dose. Two-thirds of patients (19/28) who completed the PATH study without relapse remained relapse-free on the 0.2 g/kg dose after dose reduction in the extension study. Sixty-two patients had adverse events (AEs) (76%), of which most were mild or moderate with no related serious AEs. Conclusions Subcutaneous treatment with IgPro20 provided long-term benefit at both 0.4 and 0.2 g/kg weekly doses with lower relapse rates on the higher dose. Long-term dosing should be individualized to find the most appropriate dose in a given patient. Classification of evidence This study provides Class IV evidence that for patients with CIDP, long-term treatment with SCIG beyond 24 weeks is safe and efficacious.

Published
2019

17. Efficacy and safety of IVIG in CIDP: Combined data of the PRIMA and PATH studies

Author

Merkies, ISJ, van Schaik, IN, Leger, J-M, Bril, V, van Geloven, N, Hartung, H-P, Lewis, RA, Sobue, G, Lawo, J-P, Durn, BL, Cornblath, DR, De Bleecker, JL, Sommer, C, Robberecht, W, Saarela, M, Kamienowski, J, Stelmasiak, Z, Tackenberg, B, Mielke, O, Sabet, A, George, K, Roberts, L, Carne, R, Blum, S, Henderson, R, Van Damme, P, Demeestere, J, Larue, S, D'Amour, C, Kunc, P, Valis, M, Sussova, J, Kalous, T, Talab, R, Bednar, M, Toomsoo, T, Rubanovits, I, Gross-Paju, K, Sorro, U, Auranen, M, Pouget, J, Attarian, S, Le Masson, G, Wielanek-Bachelet, A, Desnuelle, C, Delmont, E, Clavelou, P, Aufauvre, D, Schmidt, J, Zschuentzsch, J, Kramer, D, Hoffmann, O, Goerlitz, C, Haas, J, Chatzopoulos, M, Yoon, R, Gold, R, Berlit, P, Jaspert-Grehl, A, Liebetanz, D, Kutschenko, A, Stangel, M, Trebst, C, Baum, P, Bergh, F, Klehmet, J, Meisel, A, Klostermann, F, Oechtering, J, Lehmann, H, Schroeter, M, Hagenacker, T, Mueller, D, Sperfeld, A, Bethke, F, Drory, V, Algom, A, Yarnitsky, D, Murinson, B, Di Muzio, A, Ciccocioppo, F, Sorbi, S, Mata, S, Schenone, A, Grandis, M, Lauria, G, Cazzato, D, Antonini, G, Morino, S, Cocito, D, Zibetti, M, Yokota, T, Ohkubo, T, Kanda, T, Kawai, M, Kaida, K, Onoue, H, Kuwabara, S, Mori, M, Iijima, M, Ohyama, K, Baba, M, Tomiyama, M, Nishiyama, K, Akutsu, T, Yokoyama, K, Kanai, K, Eftimov, F, Notermans, NC, Visser, N, Faber, C, Hoeijmakers, J, Rejdak, K, Chyrchel-Paszkiewicz, U, Casanovas Pons, C, Antonia, M, Gamez, J, Salvado, M, Marquez Infante, C, Benitez, S, Lunn, M, Morrow, J, Gosal, D, Lavin, T, Melamed, I, Testori, A, Ajroud-Driss, S, Menichella, D, Simpson, Lai, EC-H, Dimachkie, M, Barohn, RJ, Beydoun, S, Johl, H, Lange, D, Shtilbans, A, Muley, S, Ladha, S, Freimer, M, Kissel, J, Latov, N, Chin, R, Ubogu, E, Mumfrey, S, Rao, T, MacDonald, P, Sharma, K, Gonzalez, G, Allen, J, Walk, D, Hobson-Webb, L, Gable, K, Franques, J, Morales, RJ, Nguento, A, Schrey, C, Zwolinska, G, Merkies, ISJ, van Schaik, IN, Leger, J-M, Bril, V, van Geloven, N, Hartung, H-P, Lewis, RA, Sobue, G, Lawo, J-P, Durn, BL, Cornblath, DR, De Bleecker, JL, Sommer, C, Robberecht, W, Saarela, M, Kamienowski, J, Stelmasiak, Z, Tackenberg, B, Mielke, O, Sabet, A, George, K, Roberts, L, Carne, R, Blum, S, Henderson, R, Van Damme, P, Demeestere, J, Larue, S, D'Amour, C, Kunc, P, Valis, M, Sussova, J, Kalous, T, Talab, R, Bednar, M, Toomsoo, T, Rubanovits, I, Gross-Paju, K, Sorro, U, Auranen, M, Pouget, J, Attarian, S, Le Masson, G, Wielanek-Bachelet, A, Desnuelle, C, Delmont, E, Clavelou, P, Aufauvre, D, Schmidt, J, Zschuentzsch, J, Kramer, D, Hoffmann, O, Goerlitz, C, Haas, J, Chatzopoulos, M, Yoon, R, Gold, R, Berlit, P, Jaspert-Grehl, A, Liebetanz, D, Kutschenko, A, Stangel, M, Trebst, C, Baum, P, Bergh, F, Klehmet, J, Meisel, A, Klostermann, F, Oechtering, J, Lehmann, H, Schroeter, M, Hagenacker, T, Mueller, D, Sperfeld, A, Bethke, F, Drory, V, Algom, A, Yarnitsky, D, Murinson, B, Di Muzio, A, Ciccocioppo, F, Sorbi, S, Mata, S, Schenone, A, Grandis, M, Lauria, G, Cazzato, D, Antonini, G, Morino, S, Cocito, D, Zibetti, M, Yokota, T, Ohkubo, T, Kanda, T, Kawai, M, Kaida, K, Onoue, H, Kuwabara, S, Mori, M, Iijima, M, Ohyama, K, Baba, M, Tomiyama, M, Nishiyama, K, Akutsu, T, Yokoyama, K, Kanai, K, Eftimov, F, Notermans, NC, Visser, N, Faber, C, Hoeijmakers, J, Rejdak, K, Chyrchel-Paszkiewicz, U, Casanovas Pons, C, Antonia, M, Gamez, J, Salvado, M, Marquez Infante, C, Benitez, S, Lunn, M, Morrow, J, Gosal, D, Lavin, T, Melamed, I, Testori, A, Ajroud-Driss, S, Menichella, D, Simpson, Lai, EC-H, Dimachkie, M, Barohn, RJ, Beydoun, S, Johl, H, Lange, D, Shtilbans, A, Muley, S, Ladha, S, Freimer, M, Kissel, J, Latov, N, Chin, R, Ubogu, E, Mumfrey, S, Rao, T, MacDonald, P, Sharma, K, Gonzalez, G, Allen, J, Walk, D, Hobson-Webb, L, Gable, K, Franques, J, Morales, RJ, Nguento, A, Schrey, C, and Zwolinska, G

Abstract

Intravenous immunoglobulin (IVIG) is a potential therapy for chronic inflammatory demyelinating polyneuropathy (CIDP). To investigate the efficacy and safety of the IVIG IgPro10 (Privigen) for treatment of CIDP, results from Privigen Impact on Mobility and Autonomy (PRIMA), a prospective, open-label, single-arm study of IVIG in immunoglobulin (Ig)-naïve or IVIG pre-treated subjects (NCT01184846, n = 28) and Polyneuropathy And Treatment with Hizentra (PATH), a double-blind, randomized study including an open-label, single-arm IVIG phase in IVIG pre-treated subjects (NCT01545076, IVIG restabilization phase n = 207) were analyzed separately and together (n = 235). Efficacy assessments included change in adjusted inflammatory neuropathy cause and treatment (INCAT) score, grip strength and Medical Research Council (MRC) sum score. Adverse drug reactions (ADRs) and ADRs/infusion were recorded. Adjusted INCAT response rate was 60.7% in all PRIMA subjects at Week 25 (76.9% in IVIG pre-treated subjects) and 72.9% in PATH. In the pooled cohort (n = 235), INCAT response rate was 71.5%; median time to INCAT improvement was 4.3 weeks. No clear demographic differences were noticed between early (responding before Week 7, n = 148) and late responders (n = 21). In the pooled cohort, median change from baseline to last observation was -1.0 (interquartile range -2.0; 0.0) point for INCAT score; +8.0 (0.0; 20.0) kPa for maximum grip strength; +3.0 (1.0; 7.0) points for MRC sum score. In the pooled cohort, 271 ADRs were reported in 105 subjects (44.7%), a rate of 0.144 ADRs per infusion. This analysis confirms the efficacy and safety of IgPro10, a recently FDA-approved IVIG for CIDP, in a population of mainly pre-treated subjects with CIDP [Correction added on 14 March 2019 after first online publication: the INCAT response rate has been corrected.].

Published
2019

18. Restabilization treatment after intravenous immunoglobulin withdrawal in chronic inflammatory demyelinating polyneuropathy: Results from the pre-randomization phase of the Polyneuropathy And Treatment with Hizentra study

Author

Mielke, O, Bril, V, Cornblath, DR, Lawo, J-P, van Geloven, N, Hartung, H-P, Lewis, RA, Merkies, ISJ, Sobue, G, Durn, B, Shebl, A, van Schaik, IN, Sabet, A, George, K, Roberts, L, Carne, R, Blum, S, Henderson, R, Van Damme, P, Demeestere, J, Larue, S, D'Amour, C, Kunc, P, Valis, M, Sussova, J, Kalous, T, Talab, R, Bednar, M, Toomsoo, T, Rubanovits, I, Gross-Paju, K, Sorro, U, Saarela, M, Auranen, M, Pouget, J, Attarian, S, Le Masson, G, Wielanek-Bachelet, A, Desnuelle, C, Delmont, E, Clavelou, P, Aufauvre, D, Schmidt, J, Zschuentzsch, J, Sommer, C, Kramer, D, Hoffmann, O, Goerlitz, C, Haas, J, Chatzopoulos, M, Yoon, R, Gold, R, Berlit, P, Jaspert-Grehl, A, Liebetanz, D, Kutschenko, A, Stangel, M, Trebst, C, Baum, P, Bergh, F, Klehmet, J, Meisel, A, Klostermann, F, Oechtering, J, Lehmann, H, Schroeter, M, Hagenacker, T, Mueller, D, Sperfeld, A, Bethke, F, Drory, V, Algom, A, Yarnitsky, D, Murinson, B, Di Muzio, A, Ciccocioppo, F, Sorbi, S, Mata, S, Schenone, A, Grandis, M, Lauria, G, Cazzato, D, Antonini, G, Morino, S, Cocito, D, Zibetti, M, Yokota, T, Ohkubo, T, Kanda, T, Kawai, M, Kaida, K, Onoue, H, Kuwabara, S, Mori, M, Iijima, M, Ohyama, K, Baba, M, Tomiyama, M, Nishiyama, K, Akutsu, T, Yokoyama, K, Kanai, K, Eftimov, F, Notermans, NC, Visser, N, Faber, C, Hoeijmakers, J, Rejdak, K, Chyrchel-Paszkiewicz, U, Casanovas Pons, C, Antonia, M, Gamez, J, Salvado, M, Marquez Infante, C, Benitez, S, Lunn, M, Morrow, J, Gosal, D, Lavin, T, Melamed, I, Testori, A, Ajroud-Driss, S, Menichella, D, Simpson, E, Lai, EC-H, Dimachkie, M, Barohn, RJ, Beydoun, S, Johl, H, Lange, D, Shtilbans, A, Muley, S, Ladha, S, Freimer, M, Kissel, J, Latov, N, Chin, R, Ubogu, E, Mumfrey, S, Rao, T, MacDonald, P, Sharma, K, Gonzalez, G, Allen, J, Walk, D, Hobson-Webb, L, Gable, K, Mielke, O, Bril, V, Cornblath, DR, Lawo, J-P, van Geloven, N, Hartung, H-P, Lewis, RA, Merkies, ISJ, Sobue, G, Durn, B, Shebl, A, van Schaik, IN, Sabet, A, George, K, Roberts, L, Carne, R, Blum, S, Henderson, R, Van Damme, P, Demeestere, J, Larue, S, D'Amour, C, Kunc, P, Valis, M, Sussova, J, Kalous, T, Talab, R, Bednar, M, Toomsoo, T, Rubanovits, I, Gross-Paju, K, Sorro, U, Saarela, M, Auranen, M, Pouget, J, Attarian, S, Le Masson, G, Wielanek-Bachelet, A, Desnuelle, C, Delmont, E, Clavelou, P, Aufauvre, D, Schmidt, J, Zschuentzsch, J, Sommer, C, Kramer, D, Hoffmann, O, Goerlitz, C, Haas, J, Chatzopoulos, M, Yoon, R, Gold, R, Berlit, P, Jaspert-Grehl, A, Liebetanz, D, Kutschenko, A, Stangel, M, Trebst, C, Baum, P, Bergh, F, Klehmet, J, Meisel, A, Klostermann, F, Oechtering, J, Lehmann, H, Schroeter, M, Hagenacker, T, Mueller, D, Sperfeld, A, Bethke, F, Drory, V, Algom, A, Yarnitsky, D, Murinson, B, Di Muzio, A, Ciccocioppo, F, Sorbi, S, Mata, S, Schenone, A, Grandis, M, Lauria, G, Cazzato, D, Antonini, G, Morino, S, Cocito, D, Zibetti, M, Yokota, T, Ohkubo, T, Kanda, T, Kawai, M, Kaida, K, Onoue, H, Kuwabara, S, Mori, M, Iijima, M, Ohyama, K, Baba, M, Tomiyama, M, Nishiyama, K, Akutsu, T, Yokoyama, K, Kanai, K, Eftimov, F, Notermans, NC, Visser, N, Faber, C, Hoeijmakers, J, Rejdak, K, Chyrchel-Paszkiewicz, U, Casanovas Pons, C, Antonia, M, Gamez, J, Salvado, M, Marquez Infante, C, Benitez, S, Lunn, M, Morrow, J, Gosal, D, Lavin, T, Melamed, I, Testori, A, Ajroud-Driss, S, Menichella, D, Simpson, E, Lai, EC-H, Dimachkie, M, Barohn, RJ, Beydoun, S, Johl, H, Lange, D, Shtilbans, A, Muley, S, Ladha, S, Freimer, M, Kissel, J, Latov, N, Chin, R, Ubogu, E, Mumfrey, S, Rao, T, MacDonald, P, Sharma, K, Gonzalez, G, Allen, J, Walk, D, Hobson-Webb, L, and Gable, K

Abstract

In patients with chronic inflammatory demyelinating polyneuropathy (CIDP), intravenous immunoglobulin (IVIG) is recommended to be periodically reduced to assess the need for ongoing therapy. However, little is known about the effectiveness of restabilization with IVIG in patients who worsen after IVIG withdrawal. In the Polyneuropathy And Treatment with Hizentra (PATH) study, the pre-randomization period included sudden stopping of IVIG followed by 12 weeks of observation. Those deteriorating were then restabilized with IVIG. Of 245 subjects who stopped IVIG, 28 did not show signs of clinical deterioration within 12 weeks. Two hundred and seven received IVIG restabilization with an induction dose of 2 g/kg bodyweight (bw) IgPro10 (Privigen, CSL Behring, King of Prussia, Pennsylvania) and maintenance doses of 1 g/kg bw every 3 weeks for up to 13 weeks. Signs of clinical improvement were seen in almost all (n = 188; 91%) subjects. During IVIG restabilization, 35 subjects either did not show CIDP stability (n = 21, analyzed as n = 22 as an additional subject was randomized in error) or withdrew for other reasons (n = 14). Of the 22 subjects who did not achieve clinical stability, follow-up information in 16 subjects after an additional 4 weeks was obtained. Nine subjects were reported to have improved, leaving a maximum of 27 subjects (13%) who either showed no signs of clinical improvement during the restabilization phase and 4 weeks post-study or withdrew for other reasons. In conclusion, sudden IVIG withdrawal was effective in detecting ongoing immunoglobulin G dependency with a small risk for subjects not returning to their baseline 17 weeks after withdrawal.

Published
2019

19. Screening for Fabry disease and Hereditary ATTR amyloidosis in idiopathic small-fiber and mixed neuropathy

Author

Samuelsson, K. (Kristin), Radovic, A. (Ana), Press, R. (Rayomand), Auranen, M. (Mari), Ylikallio, E. (Emil), Tyynismaa, H. (Henna), Kärppä, M. (Mikko), Veteläinen, M. (Matilda), Peltola, N. (Niina), Mellgren, S. I. (Svein Ivar), Mygland, Å. (Åse), Tallaksen, C. (Chantal), Andersen, H. (Henning), Juhl Terkelsen, A. (Astrid), Fontain, F. (Freja), Hietaharju, A. (Aki), Samuelsson, K. (Kristin), Radovic, A. (Ana), Press, R. (Rayomand), Auranen, M. (Mari), Ylikallio, E. (Emil), Tyynismaa, H. (Henna), Kärppä, M. (Mikko), Veteläinen, M. (Matilda), Peltola, N. (Niina), Mellgren, S. I. (Svein Ivar), Mygland, Å. (Åse), Tallaksen, C. (Chantal), Andersen, H. (Henning), Juhl Terkelsen, A. (Astrid), Fontain, F. (Freja), and Hietaharju, A. (Aki)

Abstract

Introduction: In this study we assessed the value of genetic screening for Fabry disease (FD) and hereditary ATTR amyloidosis in patients with idiopathic small‐fiber neuropathy (SFN) or mixed neuropathy in a clinical setting. Methods: This was a Nordic multicenter study with 9 participating centers. Patients with idiopathic SFN or mixed neuropathy were included. Genetic sequencing of the TTR and GLA genes was performed. Results: There were 172 patients enrolled in the study. Genetic screening was performed in 155 patients. No pathogenic mutations in the TTR gene were found. A single patient had a possible pathogenic variant, R118C, in the GLA gene, but clinical investigation showed no firm signs of FD. Discussion: Screening for hereditary ATTR amyloidosis and FD in patients with idiopathic SFN or mixed neuropathy without any additional disease‐specific symptoms or clinical characteristics in a Nordic population appears to be of little value in a clinical setting.

Published
2019

21. Demyelinating Neuropathy of the 1a Afferent Nerve Fibers

Author

Partanen, J., Auranen, M., Department of Neurosciences, Kliinisen neurofysiologian yksikkö, Clinicum, University of Helsinki, Neurologian yksikkö, HUS Medical Imaging Center, and HUS Neurocenter

Subjects
education, 3112 Neurosciences
Published
2017

22. MYOFIBRILLAR AND DISTAL MYOPATHIES

Author

Palmio, J., primary, Sainio, M., additional, Välipakka, S., additional, Jokela, M., additional, Auranen, M., additional, Paetau, A., additional, Huovinen, S., additional, Lapatto, H., additional, Ylikallio, E., additional, Udd, B., additional, and Tyynismaa, H., additional

Published
2018
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23. Subcutaneous immunoglobulin for maintenance treatment in chronic inflammatory demyelinating polyneuropathy (PATH): a randomised, double-blind, placebo-controlled, phase 3 trial

Author

van Schaik, Ivo N, primary, Bril, Vera, additional, van Geloven, Nan, additional, Hartung, Hans-Peter, additional, Lewis, Richard A, additional, Sobue, Gen, additional, Lawo, John-Philip, additional, Praus, Michaela, additional, Mielke, Orell, additional, Durn, Billie L, additional, Cornblath, David R, additional, Merkies, Ingemar S J, additional, Sabet, A., additional, George, K., additional, Roberts, L., additional, Carne, R., additional, Blum, S., additional, Henderson, R., additional, Van Damme, P., additional, Demeestere, J., additional, Larue, S., additional, D'Amour, C., additional, Bril, V., additional, Breiner, A., additional, Kunc, P., additional, Valis, M., additional, Sussova, J., additional, Kalous, T., additional, Talab, R., additional, Bednar, M., additional, Toomsoo, T., additional, Rubanovits, I., additional, Gross-Paju, K., additional, Sorro, U., additional, Saarela, M., additional, Auranen, M., additional, Pouget, J., additional, Attarian, S., additional, Le Masson, G., additional, Wielanek-Bachelet, A., additional, Desnuelle, C., additional, Delmont, E., additional, Clavelou, P., additional, Aufauvre, D., additional, Schmidt, J., additional, Zschuentssch, J., additional, Sommer, C., additional, Kramer, D., additional, Hoffmann, O., additional, Goerlitz, C., additional, Haas, J., additional, Chatzopoulos, M., additional, Yoon, R., additional, Gold, R., additional, Berlit, P., additional, Jaspert-Grehl, A., additional, Liebetanz, D., additional, Kutschenko, A., additional, Stangel, M., additional, Trebst, C., additional, Baum, P., additional, Bergh, F., additional, Klehmet, J., additional, Meisel, A., additional, Klostermann, F., additional, Oechtering, J., additional, Lehmann, H., additional, Schroeter, M., additional, Hagenacker, T., additional, Mueller, D., additional, Sperfeld, A., additional, Bethke, F., additional, Drory, V., additional, Algom, A., additional, Yarnitsky, D., additional, Murinson, B., additional, Di Muzio, A., additional, Ciccocioppo, F., additional, Sorbi, S., additional, Mata, S., additional, Schenone, A., additional, Grandis, M., additional, Lauria, G., additional, Cazzato, D., additional, Antonini, G., additional, Morino, S., additional, Cocito, D., additional, Zibetti, M., additional, Yokota, T., additional, Ohkubo, T., additional, Kanda, T., additional, Kawai, M., additional, Kaida, K., additional, Onoue, H., additional, Kuwabara, S., additional, Mori, M., additional, Iijima, M., additional, Ohyama, K., additional, Baba, M., additional, Tomiyama, M., additional, Nishiyama, K., additional, Akutsu, T., additional, Yokoyama, K., additional, Kanai, K., additional, van Schaik, I.N., additional, Eftimov, F., additional, Notermans, N.C., additional, Visser, N., additional, Faber, C., additional, Hoeijmakers, J., additional, Rejdak, K., additional, Chyrchel-Paszkiewicz, U., additional, Casanovas Pons, C., additional, Alberti Aguiló, M., additional, Gamez, J., additional, Figueras, M., additional, Marquez Infante, C., additional, Benitez Rivero, S., additional, Lunn, M., additional, Morrow, J., additional, Gosal, D., additional, Lavin, T., additional, Melamed, I., additional, Testori, A., additional, Ajroud-Driss, S., additional, Menichella, D., additional, Simpson, E., additional, Chi-Ho Lai, E., additional, Dimachkie, M., additional, Barohn, R.J., additional, Beydoun, S., additional, Johl, H., additional, Lange, D., additional, Shtilbans, A., additional, Muley, S., additional, Ladha, S., additional, Freimer, M., additional, Kissel, J., additional, Latov, N., additional, Chin, R., additional, Ubogu, E., additional, Mumfrey, S., additional, Rao, T., additional, MacDonald, P., additional, Sharma, K., additional, Gonzalez, G., additional, Allen, J., additional, Walk, D., additional, Hobson-Webb, L., additional, and Gable, K., additional

Published
2018
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24. Riboflavin-Responsive and -Non-responsive Mutations in FAD Synthase Cause Multiple Acyl-CoA Dehydrogenase and Combined Respiratory-Chain Deficiency

Author

Olsen, R. K., Konarikova, E., Giancaspero, T. A., Mosegaard, S., Boczonadi, V., Matakovic, L., Veauville-Merllie, A., Terrile, C., Schwarzmayr, T., Haack, T. B., Auranen, M., Leone, P., Galluccio, M., Imbard, A., Gutierrez-Rios, P., Palmfeldt, J., Graf, E., Vianey-Saban, Christine, Oppenheim, M., Schiff, M., Pichard, S., Rigal, O., Pyle, A., Chinnery, P. F., Konstantopoulou, V., Moslinger, D., Feichtinger, R. G., Talim, B., Topaloglu, H., Coskun, T., Gucer, S., Botta, A., Pegoraro, E., Malena, A., Vergani, L., Mazza, D., Zollino, M., Ghezzi, D., Acquaviva, C., Tyni, T., Boneh, A., Meitinger, T., Strom, T. M., Gregersen, N., Mayr, J. A., Horvath, R., Barile, M., Prokisch, H., Cardiovasculaire, métabolisme, diabétologie et nutrition (CarMeN), Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hospices Civils de Lyon (HCL), Hospices Civils de Lyon (HCL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National de la Recherche Agronomique (INRA), Clinicum, Neurologian yksikkö, Children's Hospital, Lastenneurologian yksikkö, HUS Children and Adolescents, and Pillet, Lauriane

Subjects
Male, Mitochondrial Diseases, Genetics, Genetics (clinical), Riboflavin, [SDV]Life Sciences [q-bio], Messenger, Settore MED/03 - GENETICA MEDICA, DISEASE, FUNCTIONAL-CHARACTERIZATION, MITOCHONDRIA, Site-Directed, Genetics(clinical), heterocyclic compounds, Frameshift Mutation, Multiple Acyl Coenzyme A Dehydrogenase Deficiency, Cells, Cultured, Skin, Cultured, Blotting, Reverse Transcriptase Polymerase Chain Reaction, Skeletal, Nucleotidyltransferases, [SDV] Life Sciences [q-bio], Liver, ESCHERICHIA-COLI, Adult, Blotting, Western, Case-Control Studies, Electron Transport, Female, Fibroblasts, Flavin-Adenine Dinucleotide, Gene Expression Profiling, Humans, Infant, Infant, Newborn, Muscle, Skeletal, Mutagenesis, Site-Directed, Protein Binding, RNA, Messenger, Real-Time Polymerase Chain Reaction, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Vitamin B Complex, Young Adult, Muscle, Western, Cells, Article, VIALETTO-VAN LAERE, Matrix-Assisted Laser Desorption-Ionization, COFACTORS, Spectrometry, ISOFORM 2, Mass, Newborn, ELECTRON-TRANSFER FLAVOPROTEIN, OVER-EXPRESSION, enzymes and coenzymes (carbohydrates), Mutagenesis, RNA, bacteria, 3111 Biomedicine, SYNTHETASE
Abstract

International audience; Multiple acyl-CoA dehydrogenase deficiencies (MADDs) are a heterogeneous group of metabolic disorders with combined respiratory-chain deficiency and a neuromuscular phenotype. Despite recent advances in understanding the genetic basis of MADD, a number of cases remain unexplained. Here, we report clinically relevant variants in FLAD1, which encodes FAD synthase (FADS), as the cause of MADD and respiratory-chain dysfunction in nine individuals recruited from metabolic centers in six countries. In most individuals, we identified biallelic frameshift variants in the molybdopterin binding (MPTb) domain, located upstream of the FADS domain. Inasmuch as FADS is essential for cellular supply of FAD cofactors, the finding of biallelic frameshift variants was unexpected. Using RNA sequencing analysis combined with protein mass spectrometry, we discovered FLAD1 isoforms, which only encode the FADS domain. The existence of these isoforms might explain why affected individuals with biallelic FLAD1 frameshift variants still harbor substantial FADS activity. Another group of individuals with a milder phenotype responsive to riboflavin were shown to have single amino acid changes in the FADS domain. When produced in E. coli, these mutant FADS proteins resulted in impaired but detectable FADS activity; for one of the variant proteins, the addition of FAD significantly improved protein stability, arguing for a chaperone-like action similar to what has been reported in other riboflavin-responsive inborn errors of metabolism. In conclusion, our studies identify FLAD1 variants as a cause of potentially treatable inborn errors of metabolism manifesting with MADD and shed light on the mechanisms by which FADS ensures cellular FAD homeostasis.

Published
2016

25. FGF21 is a biomarker for mitochondrial translation and mtDNA maintenance disorders

Author

Lehtonen, J., Forsström, S., Bottani, E., Viscomi, C., Baris, O.R., Isoniemi, H., Höckerstedt, K., Österlund, P., Hurme, M., Jylhävä, J., Leppä, S., Markkula, R., Heliö, T., Mombelli, G., Uusimaa, J., Laaksonen, R., Laaksovirta, H., Auranen, M., Zeviani, M., Smeitink, J., Wiesner, R.J., Nakada, K., Isohanni, P., Suomalainen, A., Lehtonen, J., Forsström, S., Bottani, E., Viscomi, C., Baris, O.R., Isoniemi, H., Höckerstedt, K., Österlund, P., Hurme, M., Jylhävä, J., Leppä, S., Markkula, R., Heliö, T., Mombelli, G., Uusimaa, J., Laaksonen, R., Laaksovirta, H., Auranen, M., Zeviani, M., Smeitink, J., Wiesner, R.J., Nakada, K., Isohanni, P., and Suomalainen, A.

Abstract

Contains fulltext : 170824.pdf (publisher's version ) (Closed access)

Published
2016

26. Mutations in DNMT3B Modify Epigenetic Repression of the D4Z4 Repeat and the Penetrance of Facioscapulohumeral Dystrophy

Author

Boogaard, M.L. van den, Lemmers, R.J., Balog, J., Wohlgemuth, M., Auranen, M., Mitsuhashi, S., Vliet, P.J.C. Van, Straasheijm, K.R., Akker, R.F. van den, Kriek, M., Laurense-Bik, M.E., Raz, V., Ostaijen-ten Dam, M.M. van, Hansson, K.B., Kooi, E.L. van der, Kiuru-Enari, S., Udd, B., Tol, M.J. van, Nishino, I., Tawil, R., Tapscott, S.J., Engelen, B.G.M. van, Maarel, S.M. van der, Boogaard, M.L. van den, Lemmers, R.J., Balog, J., Wohlgemuth, M., Auranen, M., Mitsuhashi, S., Vliet, P.J.C. Van, Straasheijm, K.R., Akker, R.F. van den, Kriek, M., Laurense-Bik, M.E., Raz, V., Ostaijen-ten Dam, M.M. van, Hansson, K.B., Kooi, E.L. van der, Kiuru-Enari, S., Udd, B., Tol, M.J. van, Nishino, I., Tawil, R., Tapscott, S.J., Engelen, B.G.M. van, and Maarel, S.M. van der

Abstract

Item does not contain fulltext, Facioscapulohumeral dystrophy (FSHD) is associated with somatic chromatin relaxation of the D4Z4 repeat array and derepression of the D4Z4-encoded DUX4 retrogene coding for a germline transcription factor. Somatic DUX4 derepression is caused either by a 1-10 unit repeat-array contraction (FSHD1) or by mutations in SMCHD1, which encodes a chromatin repressor that binds to D4Z4 (FSHD2). Here, we show that heterozygous mutations in DNA methyltransferase 3B (DNMT3B) are a likely cause of D4Z4 derepression associated with low levels of DUX4 expression from the D4Z4 repeat and increased penetrance of FSHD. Recessive mutations in DNMT3B were previously shown to cause immunodeficiency, centromeric instability, and facial anomalies (ICF) syndrome. This study suggests that transcription of DUX4 in somatic cells is modified by variations in its epigenetic state and provides a basis for understanding the reduced penetrance of FSHD within families.

Published
2016

29. Gene variants in SMCHD1 and DNMT3B modify the risk for FSHD

Author

Van der Maarel, S., primary, Van den Boogaard, M., additional, Lemmers, R., additional, Balog, J., additional, Mitsuhashi, S., additional, Kriek, M., additional, Wohlgemuth, M., additional, Van der Kooi, E., additional, Auranen, M., additional, Udd, B., additional, Van Tol, M., additional, Nishino, I., additional, Tawil, R., additional, Tapscott, S., additional, and van Engelen, B., additional

Published
2016
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31. G.P.283

Author

Palmio, J.M.M., primary, Evilä, A., additional, Jonson, P.H., additional, Auranen, M., additional, Kiuru-Enari, S., additional, Pihko, H., additional, Hackman, P., additional, and Udd, B., additional

Published
2014
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33. Enrichment of the R77C alpha-sarcoglycan gene mutation in Finnish LGMD2D patients.

Author

Hackman, P, Juvonen, V, Sarparanta, J, Penttinen, M, Aärimaa, T, Uusitalo, M, Auranen, M, Pihko, H, Alén, R, Junes, M, Lönnqvist, T, Kalimo, H, Udd, B, Hackman, P, Juvonen, V, Sarparanta, J, Penttinen, M, Aärimaa, T, Uusitalo, M, Auranen, M, Pihko, H, Alén, R, Junes, M, Lönnqvist, T, Kalimo, H, and Udd, B

Published
2005

39. Secondary calpain3 deficiency in 2q-linked muscular dystrophy

Author

Haravuori, H., primary, Vihola, A., additional, Straub, V., additional, Auranen, M., additional, Richard, I., additional, Marchand, S., additional, Voit, T., additional, Labeit, S., additional, Somer, H., additional, Peltonen, L., additional, Beckmann, J.S., additional, and Udd, B., additional

Published
2001
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44. ATpase-deficient mitochondrial inner membrane protein ATAD3a disturbs mitochondrial dynamics in dominant hereditary spastic paraplegia

Author

Cooper H., Yang Y., Ylikallio E., Khairullin R., Woldegebriel R., Lin K., Euro L., Palin E., Wolf A., Trokovic R., Isohanni P., Kaakkola S., Auranen M., Lonqvist T., Wanrooij S., Tyynismaa H., Cooper H., Yang Y., Ylikallio E., Khairullin R., Woldegebriel R., Lin K., Euro L., Palin E., Wolf A., Trokovic R., Isohanni P., Kaakkola S., Auranen M., Lonqvist T., Wanrooij S., and Tyynismaa H.

Abstract

© The Author 2017. Published by Oxford University Press. All rights reserved.De novo mutations in ATAD3A (ATPase family AAA-domain containing protein 3A) were recently found to cause a neurological syndrome with developmental delay, hypotonia, spasticity, optic atrophy, axonal neuropathy, and hypertrophic cardiomyopathy. Using whole-exome sequencing, we identified a dominantly inherited heterozygous variant c.1064G>A (p. G355D) in ATAD3A in a mother presenting with hereditary spastic paraplegia (HSP) and axonal neuropathy and her son with dyskinetic cerebral palsy, both with disease onset in childhood. HSP is a clinically and genetically heterogeneous disorder of the upper motor neurons. Symptoms beginning in early childhood may resemble spastic cerebral palsy. The function of ATAD3A, a mitochondrial inner membrane AAA ATPase, is yet undefined. AAA ATPases form hexameric rings, which are catalytically dependent on the co-operation of the subunits. The dominant-negative patient mutation affects the Walker A motif, which is responsible for ATP binding in the AAA module of ATAD3A, and we show that the recombinant mutant ATAD3A protein has a markedly reduced ATPase activity. We further show that overexpression of the mutant ATAD3A fragments the mitochondrial network and induces lysosome mass. Similarly, we observed altered dynamics of the mitochondrial network and increased lysosomes in patient fibroblasts and neurons derived through differentiation of patient-specific induced pluripotent stem cells. These alterations were verified in patient fibroblasts to associate with upregulated basal autophagy through mTOR inactivation, resembling starvation. Mutations in ATAD3A can thus be dominantly inherited and underlie variable neurological phenotypes, including HSP, with intrafamiliar variability. This finding extends the group of mitochondrial inner membrane AAA proteins associated with spasticity.

45. ATpase-deficient mitochondrial inner membrane protein ATAD3a disturbs mitochondrial dynamics in dominant hereditary spastic paraplegia

Author

Cooper H., Yang Y., Ylikallio E., Khairullin R., Woldegebriel R., Lin K., Euro L., Palin E., Wolf A., Trokovic R., Isohanni P., Kaakkola S., Auranen M., Lonqvist T., Wanrooij S., Tyynismaa H., Cooper H., Yang Y., Ylikallio E., Khairullin R., Woldegebriel R., Lin K., Euro L., Palin E., Wolf A., Trokovic R., Isohanni P., Kaakkola S., Auranen M., Lonqvist T., Wanrooij S., and Tyynismaa H.

Abstract

© The Author 2017. Published by Oxford University Press. All rights reserved.De novo mutations in ATAD3A (ATPase family AAA-domain containing protein 3A) were recently found to cause a neurological syndrome with developmental delay, hypotonia, spasticity, optic atrophy, axonal neuropathy, and hypertrophic cardiomyopathy. Using whole-exome sequencing, we identified a dominantly inherited heterozygous variant c.1064G>A (p. G355D) in ATAD3A in a mother presenting with hereditary spastic paraplegia (HSP) and axonal neuropathy and her son with dyskinetic cerebral palsy, both with disease onset in childhood. HSP is a clinically and genetically heterogeneous disorder of the upper motor neurons. Symptoms beginning in early childhood may resemble spastic cerebral palsy. The function of ATAD3A, a mitochondrial inner membrane AAA ATPase, is yet undefined. AAA ATPases form hexameric rings, which are catalytically dependent on the co-operation of the subunits. The dominant-negative patient mutation affects the Walker A motif, which is responsible for ATP binding in the AAA module of ATAD3A, and we show that the recombinant mutant ATAD3A protein has a markedly reduced ATPase activity. We further show that overexpression of the mutant ATAD3A fragments the mitochondrial network and induces lysosome mass. Similarly, we observed altered dynamics of the mitochondrial network and increased lysosomes in patient fibroblasts and neurons derived through differentiation of patient-specific induced pluripotent stem cells. These alterations were verified in patient fibroblasts to associate with upregulated basal autophagy through mTOR inactivation, resembling starvation. Mutations in ATAD3A can thus be dominantly inherited and underlie variable neurological phenotypes, including HSP, with intrafamiliar variability. This finding extends the group of mitochondrial inner membrane AAA proteins associated with spasticity.

46. 31P Nutritional status of patients with nemaline myopathy and related congenital myopathies in Finland.

Author

Lehtokari, V., Similä, M., Tammepuu, M., Isohanni, P., Auranen, M., Hiekkala, S., Wallgren-Pettersson, C., and Strang-Karlsson, S.

Subjects
*FOOD diaries, *NEMALINE myopathy, *NUTRITIONAL status, *DIETARY fiber, *FOOD consumption
Abstract

Comprehensive research on the possible difficulties in eating or the nutritional status of persons with nemaline myopathy (NM) and related disorders (NMR) has not been done despite the fact that the muscle weakness in these disorders often affects the muscles used for eating and dining, and although some scientific evidence of poorer nutritional status of patients with myopathy exists. We conducted a pilot study among adult Finnish NM or NMR patients to investigate their food consumption, nutrient intakes, selected nutrient-related laboratory parameters in blood, and self-assessed functioning at dining and eating and of the gastrointestinal tract. The methods included a survey including eating and dining related questions, a food frequency questionnaire (FFQ), food diaries, and laboratory analyses from blood samples. We invited 32 patients, and 20 (15 females. 5 males; 16 ambulatory, 4 non-ambulatory) returned the survey and FFQ. Food diaries were returned by 17, and blood samples were obtained from 16. The inter-individual differences were large in food consumption as well as nutrient and energy intake. Energy intakes, and intakes of vitamin D, calcium, dietary fiber, vitamin C, folate, and iron as well as consumption of healthy foods (such as fruits, vegetables, and whole grains) were low, especially in non-ambulatory participants, who also reported challenges in eating and dining-related functioning. The ability to walk did not, however, determine the quality of diet, and by selecting healthy foods easy to eat (e.g. porridge and smoothies), a good diet was achievable. The laboratory parameters failed to indicate severe undernourishment in any of the participants. Thus, evaluation of food consumption and nutrient intakes were needed to find patients at risk of undernourishment. The results underline the importance of monitoring adequate intake of calcium and vitamin D in this group of patients, especially considering the immobility-induced risk of osteoporosis. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Homozygosity of a Founder Variant c.1508dupC in DOK7 Causes Congenital Myasthenia With Variable Severity.

Author

Palmio J, Kiviranta P, Hartikainen PH, Isohanni P, Auranen M, Videman K, Penttilä S, Lehtinen S, Kirjavainen J, Hintikka S, Paloviita K, Saarela J, and Udd B

Abstract

Background and Objectives: Description of 15 patients with the same variant in DOK7 causing congenital myasthenic syndrome (CMS)., Methods: Nine adult and 6 pediatric patients were studied with molecular genetic and clinical investigations., Results: All patients were identified with the c.1508dupC variant in DOK7 , of whom 13 were homozygous and 2 patients compound heterozygous. Only 2 patients had limb girdle phenotype, while all adult patients also had ptosis, ophthalmoplegia, facial weakness, as well as inspiratory stridor. Pediatric patients had severe respiratory insufficiency and feeding difficulties at birth., Discussion: The disease severity in our patients varied extensively from ventilator or wheelchair dependence to mild facial weakness, ptosis, and ophthalmoparesis. Most of the patients had normal transmission in conventional 3 Hz stimulation electrophysiologic studies, making the diagnosis of CMS challenging. Our cohort of adult and pediatric patients expands the phenotype of DOK7 CMS and shows the importance of correct and early diagnosis., Competing Interests: The authors J. Palmio, P. Isohanni, M. Auranen, and B. Udd are members of the European Reference Network for Rare Neuromuscular Diseases (ERN EURO-NMD). J. Palmio was financially supported by Tampere University Hospital Support Foundation, Tampere University Hospital (Project number MK339). P. Kiviranta, P. Hartikainen, P. Isohanni, M. Auranen, K. Videman, S. Penttilä, and S. Lehtinen report no disclosures relevant to the manuscript. J. Kirjavainen has attended advisory boards of Biogen and Roche (treatment of SMA). S. Hintikka, K. Paloviita, J. Saarela, and B. Udd report no disclosures relevant to the manuscript. Go to Neurology.org/NG for full disclosures., (Copyright © 2024 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.)

Published
2024
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48. Variants in tropomyosins TPM2 and TPM3 causing muscle hypertonia.

Author

Wallgren-Pettersson C, Jokela M, Lehtokari VL, Tyynismaa H, Sainio MT, Ylikallio E, Tynninen O, Pelin K, and Auranen M

Subjects
Humans, Female, Muscle, Skeletal pathology, Tropomyosin genetics, Muscle Hypertonia pathology, Phenotype, Mutation, Muscular Diseases pathology, Myopathies, Nemaline genetics, Myopathies, Nemaline pathology
Abstract

Patients with myopathies caused by pathogenic variants in tropomyosin genes TPM2 and TPM3 usually have muscle hypotonia and weakness, their muscle biopsies often showing fibre size disproportion and nemaline bodies. Here, we describe a series of patients with hypercontractile molecular phenotypes, high muscle tone, and mostly non-specific myopathic biopsy findings without nemaline bodies. Three of the patients had trismus, whilst in one patient, the distal joints of her fingers flexed on extension of the wrists. In one biopsy from a patient with a rare TPM3 pathogenic variant, cores and minicores were observed, an unusual finding in TPM3-caused myopathy. The variants alter conserved contact sites between tropomyosin and actin., Competing Interests: Declaration of competing interest The authors declare no competing interests., (Copyright © 2023. Published by Elsevier B.V.)

Published
2024
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49. Lowered oxidative capacity in spinal muscular atrophy, Jokela type; comparison with mitochondrial muscle disease.

Author

Ratia N, Palu E, Lantto H, Ylikallio E, Luukkonen R, Suomalainen A, Auranen M, and Piirilä P

Abstract

Introduction: Spinal muscular atrophy, Jokela type (SMAJ) is a rare autosomal dominantly hereditary form of spinal muscular atrophy caused by a point mutation c.197G>T in CHCHD10 . CHCHD10 is known to be involved in the regulation of mitochondrial function even though patients with SMAJ do not present with multiorgan symptoms of mitochondrial disease. We aimed to characterize the cardiopulmonary oxidative capacity of subjects with SMAJ compared to healthy controls and patients with mitochondrial myopathy., Methods: Eleven patients with genetically verified SMAJ, 26 subjects with mitochondrial myopathy (MM), and 28 healthy volunteers underwent a cardiopulmonary exercise test with lactate and ammonia sampling. The effect of the diagnosis group on the test results was analysed using a linear model., Results: Adjusted for sex, age, and BMI, the SMAJ group had lower power output ( p  < 0.001), maximal oxygen consumption (VO 2 max) ( p  < 0.001), and mechanical efficiency ( p  < 0.001) compared to the healthy controls but like that in MM. In the SMAJ group and healthy controls, plasma lactate was lower than in MM measured at rest, light exercise, and 30 min after exercise ( p  ≤ 0.001-0.030) and otherwise lactate in SMAJ was lower than controls and MM, in longitudinal analysis p  = 0.018. In MM, the ventilatory equivalent for oxygen was higher ( p  = 0.040), and the fraction of end-tidal CO 2 lower in maximal exercise compared to healthy controls ( p  = 0.023) and subjects with SMAJ., Conclusion: In cardiopulmonary exercise test, subjects with SMAJ showed a similar decrease in power output and oxidative capacity as subjects with mitochondrial myopathy but did not exhibit findings typical of mitochondrial disease., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision., (Copyright © 2023 Ratia, Palu, Lantto, Ylikallio, Luukkonen, Suomalainen, Auranen and Piirilä.)

Published
2023
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50. Rare PMP22 variants in mild to severe neuropathy uncorrelated to plasma GDF15 or neurofilament light.

Author

Palu E, Järvilehto J, Pennonen J, Huber N, Herukka SK, Haapasalo A, Isohanni P, Tyynismaa H, Auranen M, and Ylikallio E

Subjects
Adult, Humans, Growth Differentiation Factor 15 genetics, Intermediate Filaments, Myelin Proteins genetics, Biomarkers, Hereditary Sensory and Motor Neuropathy, Charcot-Marie-Tooth Disease genetics, Charcot-Marie-Tooth Disease diagnosis
Abstract

Charcot-Marie-Tooth disease (CMT) is a heterogeneous set of hereditary neuropathies whose genetic causes are not fully understood. Here, we characterize three previously unknown variants in PMP22 and assess their effect on the recently described potential CMT biomarkers' growth differentiation factor 15 (GDF15) and neurofilament light (NFL): first, a heterozygous PMP22 c.178G > A (p.Glu60Lys) in one mother-son pair with adult-onset mild axonal neuropathy. The variant led to abnormal splicing, confirmed in fibroblasts by reverse transcription PCR. Second, a de novo PMP22 c.35A > C (p.His12Pro), and third, a heterozygous 3.2 kb deletion predicting loss of exon 4. The latter two had severe CMT and ultrasonography showing strong nerve enlargement similar to a previous case of exon 4 loss due to a larger deletion. We further studied patients with PMP22 duplication (CMT1A) finding slightly elevated plasma NFL, as measured by the single molecule array immunoassay (SIMOA). In addition, plasma GDF15, as measured by ELISA, correlated with symptom severity for CMT1A. However, in the severely affected individuals with PMP22 exon 4 deletion or p.His12Pro, these biomarkers were within the range of variability of CMT1A and controls, although they had more pronounced nerve hypertrophy. This study adds p.His12Pro and confirms PMP22 exon 4 deletion as causes of severe CMT, whereas the previously unknown splice variant p.Glu60Lys leads to mild axonal neuropathy. Our results suggest that GDF15 and NFL do not distinguish CMT1A from advanced hypertrophic neuropathy caused by rare PMP22 variants., (© 2023. The Author(s).)

Published
2023
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