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Dijkstra JN, Rasing NB, Boon HTM, Altena-Rensen S, Cup EHC, Lanser A, Siemann IJ, van Engelen BG, Erasmus CE, Voermans NC. Quality of life and support needs in children, adolescents, and young adults with facioscapulohumeral dystrophy, a mixed-method study. Eur J Paediatr Neurol 2024; 50:64-73. [PMID: 38692157 DOI: 10.1016/j.ejpn.2024.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 01/26/2024] [Accepted: 04/15/2024] [Indexed: 05/03/2024]
Abstract
BACKGROUND AND OBJECTIVES Quality of life (QoL) in children with facioscapulohumeral dystrophy (FSHD) seems plausible decreased. Little is known about factors influencing QoL in children with FSHD. Our objective is to explore factors contributing to the QoL of children, adolescents, and young adults with FSHD, to describe how they experience life with FSHD, and to report their support needs. METHODS We performed a mixed-method study with individual age-appropriate semi-structured interviews assessing QoL in children, adolescents, and young adults with FSHD and their parents. To characterize the sample, quantitative data on QoL, pain, fatigue, and participation were collected. Interview data was analyzed using a thematic analysis. RESULTS Fourteen patients participated (age between 9 and 26 years old, eight males and six females). The degree of FSHD severity, as indicated by the FSHD-score, did not correlate with QoL. Older children had a lower QoL than younger children. Children and adolescents strived for normality regardless of physical discomfort. Phenotypical features of FSHD led to insecurity aggravated by hurtful comments of others. The unpredictability of disease progression and its implications for career and parenthood choices led to a generalized feeling of uncertainty about the future. Support was found within family and friends. Participants expressed a need for peer support and psychological support as well as recommending it to others. DISCUSSION Quality of life in childhood FSHD is diminished caused by their physical limitations, altered appearance, fear of social rejection, and uncertainty of the disease progression in the future. A fear of social rejection most likely contributes to striving for normality regardless of physical discomfort. Support should be focused on acceptance and coping with hurtful comments. It should preferably be individualized, easily accessible and not offered as therapy but rather as tutoring for children.
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Affiliation(s)
- Jildou N Dijkstra
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Nathaniël B Rasing
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Helena T M Boon
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Sandra Altena-Rensen
- Department of Pediatric Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Amalia Children's Hospital, Nijmegen, the Netherlands
| | - Edith H C Cup
- Department of Rehabilitation, Donders Institute for Brain, Cognition and Behaviour Radboud University Medical Center, Nijmegen, the Netherlands
| | - Anke Lanser
- Patient Representative and Chairman FSHD Advocacy Group, Patient Organization for Muscular Diseases Spierziekten Nederland, Baarn, the Netherlands
| | - Ietske J Siemann
- Department of Medical Psychology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Baziel G van Engelen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Corrie E Erasmus
- Department of Pediatric Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Amalia Children's Hospital, Nijmegen, the Netherlands
| | - Nicol C Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands.
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Deenen JCW, Kools J, Greco A, Thewissen R, van de Put W, Lanser A, Joosten LAB, Verbeek ALM, van Engelen BGM, Voermans NC. Living with facioscapulohumeral muscular dystrophy during the first two COVID-19 outbreaks: a repeated patient survey in the Netherlands. Acta Neurol Belg 2024; 124:559-566. [PMID: 38218752 DOI: 10.1007/s13760-023-02443-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 11/20/2023] [Indexed: 01/15/2024]
Abstract
BACKGROUND Patients with facioscapulohumeral dystrophy (FSHD) suffer from slowly progressive muscle weakness. Approximately 20% of FSHD patients end up wheelchair-dependent. FSHD patients benefit from physical activity to maintain their muscle strength as much as possible. The impact of the COVID-19 pandemic on the health of FSHD patients was unknown. OBJECTIVE This study assessed changes in daily care received, perceived psychosocial stress, and worsening of FSHD complaints in 2020. Furthermore, we compared COVID-19 infection incidence and severity of symptoms between FSHD patients and non-FSHD housemates. METHODS Three online survey rounds were sent out to all adult participants of the Dutch FSHD registry regarding daily care received, perceived psychosocial stress, COVID-19 infection rate, and COVID-19 symptoms severity. They also included COVID-19-related questions regarding the participants' housemates, which served as control group. RESULTS Participation rate was 210 (61%), 186 (54%), and 205 (59%) for survey 1, 2, and 3, respectively. Care reduction was reported by 42.7%, 40%, and 28.8% of the participants in the respective surveys. Perceived psychosocial stress increased in 44%, 30%, and 40% of the participants. Compared to the 197 non-FSHD housemates, the 213 FSHD patients reported more possibly COVID-19-related symptoms (27% vs. 39%, p = 0.017) of mostly minimal severity (63%). No difference in (possible) COVID-19 infection incidence rates was found (2.0% vs. 2.8%, p = 0.527). CONCLUSIONS The COVID-19 pandemic negatively impacted care received and increased perceived psychosocial stress in FSHD patients. However, COVID-19 infection incidence in FSHD patients was similar to their non-FSHD housemates.
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Affiliation(s)
- Johanna C W Deenen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- Department for Health Evidence, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Joost Kools
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Anna Greco
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- Department of Internal Medicine, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Renée Thewissen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Wiecke van de Put
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Anke Lanser
- Patient Representative and Chairman FSHD Advocacy Group, Patient Organization for Muscular Disease Spierziekten Nederland, Lt. Gen. van Heutszlaan 6, 3743 JN, Baarn, The Netherlands
| | - Leo A B Joosten
- Department of Internal Medicine, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
- Department of Medical Genetics, Iuliu Hatieganu University of Medicine and Pharmacy, Strada Victor Babeș 8, 400347, Cluj-Napoca, Romania
| | - Andre L M Verbeek
- Department for Health Evidence, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Baziel G M van Engelen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Nicol C Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, P. O. Box 9101, 6500 HB, Nijmegen, The Netherlands.
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Rasing NB, van de Geest-Buit WA, Chan OYA, Mul K, Lanser A, van Engelen BGM, Erasmus CE, Fischer AH, Ingels KJAO, Post B, Siemann I, Groothuis JT, Voermans NC. Treatment Approaches for Altered Facial Expression: A Systematic Review in Facioscapulohumeral Muscular Dystrophy and Other Neurological Diseases. J Neuromuscul Dis 2024; 11:535-565. [PMID: 38517799 DOI: 10.3233/jnd-230213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2024]
Abstract
Background Facial weakness is a key feature of facioscapulohumeral muscular dystrophy (FSHD) and may lead to altered facial expression and subsequent psychosocial impairment. There is no cure and supportive treatments focus on optimizing physical fitness and compensation of functional disabilities. Objective We hypothesize that symptomatic treatment options and psychosocial interventions for other neurological diseases with altered facial expression could be applicable to FSHD. Therefore, the aim of this review is to collect symptomatic treatment approaches that target facial muscle function and psychosocial interventions in various neurological diseases with altered facial expression in order to discuss the applicability to FSHD. Methods A systematic search was performed. Selected studies had to include FSHD, Bell's palsy, Moebius syndrome, myotonic dystrophy type 1, or Parkinson's disease and treatment options which target altered facial expression. Data was extracted for study and patients' characteristics, outcome assessment tools, treatment, outcome of facial expression and or psychosocial functioning. Results Forty studies met the inclusion criteria, of which only three studies included FSHD patients exclusively. Most, twenty-one, studies were performed in patients with Bell's palsy. Studies included twelve different therapy categories and results were assessed with different outcomes measures. Conclusions Five therapy categories were considered applicable to FSHD: training of (non-verbal) communication compensation strategies, speech training, physical therapy, conference attendance, and smile restoration surgery. Further research is needed to establish the effect of these therapies in FSHD. We recommend to include outcome measures in these studies that cover at least cosmetic, functional, communication, and quality of life domains.
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Affiliation(s)
- Nathaniël B Rasing
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Willianne A van de Geest-Buit
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - On Ying A Chan
- Information Specialist, Medical Library, Radboud University, Nijmegen, The Netherlands
| | - Karlien Mul
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Anke Lanser
- Patient Representative and Chairman FSHD Advocacy Group, Patient Organization for Muscular Disease Spierziekten Nederland, Baarn, The Netherlands
| | - Baziel G M van Engelen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Corrie E Erasmus
- Department of Paediatric Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Amalia Children's Hospital, Nijmegen, The Netherlands
| | - Agneta H Fischer
- Department of Psychology, Social Psychology, University of Amsterdam, Amsterdam, the Netherlands
| | - Koen J A O Ingels
- Department of Otorhinolaryngology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bart Post
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ietske Siemann
- Department of Medical Psychology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jan T Groothuis
- Department of Rehabilitation, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Nicol C Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
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Rasing NB, van de Geest-Buit W, Chan OYA, Mul K, Lanser A, Erasmus CE, Groothuis JT, Holler J, Ingels KJAO, Post B, Siemann I, Voermans NC. Psychosocial functioning in patients with altered facial expression: a scoping review in five neurological diseases. Disabil Rehabil 2023:1-20. [PMID: 37752723 DOI: 10.1080/09638288.2023.2259310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
PURPOSE To perform a scoping review to investigate the psychosocial impact of having an altered facial expression in five neurological diseases. METHODS A systematic literature search was performed. Studies were on Bell's palsy, facioscapulohumeral muscular dystrophy (FSHD), Moebius syndrome, myotonic dystrophy type 1, or Parkinson's disease patients; had a focus on altered facial expression; and had any form of psychosocial outcome measure. Data extraction focused on psychosocial outcomes. RESULTS Bell's palsy, myotonic dystrophy type 1, and Parkinson's disease patients more often experienced some degree of psychosocial distress than healthy controls. In FSHD, facial weakness negatively influenced communication and was experienced as a burden. The psychosocial distress applied especially to women (Bell's palsy and Parkinson's disease), and patients with more severely altered facial expression (Bell's palsy), but not for Moebius syndrome patients. Furthermore, Parkinson's disease patients with more pronounced hypomimia were perceived more negatively by observers. Various strategies were reported to compensate for altered facial expression. CONCLUSIONS This review showed that patients with altered facial expression in four of five included neurological diseases had reduced psychosocial functioning. Future research recommendations include studies on observers' judgements of patients during social interactions and on the effectiveness of compensation strategies in enhancing psychosocial functioning.
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Affiliation(s)
- Nathaniël B Rasing
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Willianne van de Geest-Buit
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - On Ying A Chan
- Medical Library, Radboud University, Nijmegen, The Netherlands
| | - Karlien Mul
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Anke Lanser
- Patient Representative and Chairman FSHD Advocacy Group, Patient Organization for Muscular Disease Spierziekten Nederland, Baarn, The Netherlands
| | - Corrie E Erasmus
- Department of Pediatric Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jan T Groothuis
- Department of Rehabilitation, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Judith Holler
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, and Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands
| | - Koen J A O Ingels
- Department of Otorhinolaryngology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Bart Post
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ietske Siemann
- Department of Medical Psychology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Nicol C Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
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Sezer S, Cup EHC, Roets-Merken LM, Lanser A, Siemann I, Weikamp JG, Mul K, van Engelen BG, Satink T, Voermans NC. Experiences of patients with facioscapulohumeral dystrophy with facial weakness: a qualitative study. Disabil Rehabil 2022; 44:6775-6782. [PMID: 34529524 DOI: 10.1080/09638288.2021.1973122] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
PURPOSE This study focuses on the functional and psychosocial consequences of facial weakness of patients with facioscapulohumeral muscular dystrophy (FSHD) and how they manage their daily lives. MATERIALS AND METHODS We conducted a qualitative study. Sixteen FSHD patients with varying degrees of facial weakness were interviewed using a semi-structured interview guide. Data were analyzed using the constant comparison approach based on the Straussian Grounded Theory. RESULTS Reduced facial expression affected different aspects of a participant's life, which is reinforced by fatigue. Particularly the younger participants described the confrontation with reduced facial expression as upsetting. The unpredictability of the progression of facial weakness makes many participants insecure and concerned. They generally tend to avoid discussing facial weakness with loved ones as well as with strangers. CONCLUSIONS Patients would like the expert teams to shed more light on effective skill training and psychosocial support, especially for the younger patient group. A multidisciplinary approach is needed in addition to programs focusing on the individual aspects of facial weakness. As the experienced psychosocial effect is not commonly equal to the objective degree of facial weakness, we recommend a tailored approach. Finally, these programs should point out the importance of the patient's own ingenuity.Implications for RehabilitationFacial weakness affects both activities and social participation in patients with facioscapulohumeral muscular dystrophy (FSHD), which is reinforced by fatigue.Many participants try to stay down to earth and focus on their ability to self-manage their obstacles regarding facial weakness.Thus, future treatment programs should have a multidisciplinary approach and should point out the importance of the patient's own ingenuity.
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Affiliation(s)
- Sümeyye Sezer
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Edith H C Cup
- Department of Rehabilitation, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Lieve M Roets-Merken
- Radboud Institute for Health Science, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Anke Lanser
- Patient Representative & Chairman FSHD Advocacy Group, Patient Organization for Muscular Disease Spierziekten Nederland, Baarn, The Netherlands
| | - Ietske Siemann
- Department of Medical Psychology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Janneke G Weikamp
- Department of Rehabilitation, Donders Centre for Neuroscience, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Karlien Mul
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Baziel G van Engelen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ton Satink
- Department of Occupational Therapy, HAN University of Applied Sciences, Nijmegen, The Netherlands
| | - Nicol C Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
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van de Geest-Buit WA, Rasing NB, Mul K, Deenen JCW, Vincenten SCC, Siemann I, Lanser A, Groothuis JT, van Engelen BG, Custers JAE, Voermans NC. Facing facial weakness: psychosocial outcomes of facial weakness and reduced facial function in facioscapulohumeral muscular dystrophy. Disabil Rehabil 2022:1-10. [DOI: 10.1080/09638288.2022.2092779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- W. A. van de Geest-Buit
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - N. B. Rasing
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - K. Mul
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J. C. W. Deenen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - S. C. C. Vincenten
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - I. Siemann
- Department of Medical Psychology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - A. Lanser
- Patient Representative and Chairman FSHD Advocacy Group, Patient Organization for Muscular Diseases Spierziekten Nederland, Baarn, The Netherlands
| | - J. T. Groothuis
- Department of Rehabilitation, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - B. G. van Engelen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J. A. E. Custers
- Department of Medical Psychology, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - N. C. Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
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Abel EE, Cup EH, Lanser A, Leclercq WK, Raaphorst J, Padberg GW, Satink T, Voermans NC. Experiences with bariatric surgery in patients with facioscapulohumeral dystrophy and myotonic dystrophy type 1: A qualitative study. Neuromuscul Disord 2018; 28:938-946. [DOI: 10.1016/j.nmd.2018.09.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 08/26/2018] [Accepted: 09/12/2018] [Indexed: 10/28/2022]
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Butovsky O, Siddiqui S, Gabriely G, Lanser A, Dake B, Gopal M, Doykan C, Wu P, Lawson R, Berry J, Krichevsky A, Cudkowicz M, Weiner H. Identification of a Unique miRNA Signature in CD14+/CD16- Blood-Monocytes in ALS Subjects Identical to That Observed in SOD Mice (IN9-2.002). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.in9-2.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Butovsky O, Siddiqui S, Gabriely G, Lanser A, Dake B, Gopal M, Doykan C, Wu P, Lawson R, Berry J, Krichevsky A, Cudkowicz M, Weiner H. Identification of a Unique miRNA Signature in CD14+/CD16- Blood-Monocytes in ALS Subjects Identical to That Observed in SOD Mice (P05.167). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p05.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Lanser A, Blijenberg BG, Wallenburg HC, Leijnse B. Evaluation of an enzyme-immuno-assay for the determination of total serum estrogens in pregnancy. J Clin Chem Clin Biochem 1980; 18:327-32. [PMID: 7000970 DOI: 10.1515/cclm.1980.18.6.327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We have evaluated a new diagnostic kit for the determination of total estrogens in serum or plasma of pregnant women by means of an enzyme-immuno-assay. Within-run precision had a coefficient of variation of 4.7-4.9% for total estrogen concentrations of 400 to 2000 nmol/l. For the same range of concentrations, day-to-day precision was found to be 5.9-8.9%. Mean analytic recovery of unconjugated estriol was 102%. Enzymatic hydrolysis of different estrogen conjugates was shown to be virtually complete. The antiserum used in the assay has the same affinity for estrone, estradiol and estriol. Preliminary clinical studies included 14 pregnant women. The results suggest that the determination of total estrogens in pregnancy plasma can be used to monitor fetoplacental function in much the same way as urine total estrogens are used.
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Lanser A, Blijenberg BG, Leijnse B. Evaluation of a new diagnostic kit for the enzymatic determination of creatinine. J Clin Chem Clin Biochem 1979; 17:633-8. [PMID: 501291 DOI: 10.1515/cclm.1979.17.10.633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We have evaluated a new diagnostic kit for the enzymatic determination of creatinine in serum, plasma and urine. The method was found to be linear up to 1000 mumol/l. Within-run precision had a coefficient of variation of 3.1--5.6% for normal to slightly elevated values and of 2.3--3.3% for values of about 320 mumol/l. Day-to-day precision was found to be 7.8 and 5.7% for values of 94 and 141 mumol/l, respectively. Mean analytic recovery was 98%. Bilirubin and hemoglobin did not interfere in concentrations up to 490 and 240 mumol/l, respectively. The influence of lipids was studied. Correlation studies were done with two other methods, the Technicon SMA 12/60 method and the Dutch standard manual method.
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Lanser A, Oldenziel H, Pronk C, Lequin H. Some critical remarks on a gas chromatographic determination of homovanillic acid and vanilmandelic acid. Clin Chim Acta 1974. [DOI: 10.1016/0009-8981(74)90378-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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