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Matrone C, Dzamko N, Madsen P, Nyegaard M, Pohlmann R, Søndergaard RV, Lassen LB, Andresen TL, Halliday GM, Jensen PH, Nielsen MS. Mannose 6-Phosphate Receptor Is Reduced in -Synuclein Overexpressing Models of Parkinsons Disease. PLoS One 2016; 11:e0160501. [PMID: 27509067 PMCID: PMC4979956 DOI: 10.1371/journal.pone.0160501] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 07/20/2016] [Indexed: 12/03/2022] Open
Abstract
Increasing evidence points to defects in autophagy as a common denominator in most neurodegenerative conditions. Progressive functional decline in the autophagy-lysosomal pathway (ALP) occurs with age, and the consequent impairment in protein processing capacity has been associated with a higher risk of neurodegeneration. Defects in cathepsin D (CD) processing and α-synuclein degradation causing its accumulation in lysosomes are particularly relevant for the development of Parkinson's disease (PD). However, the mechanism by which alterations in CD maturation and α-synuclein degradation leads to autophagy defects in PD neurons is still uncertain. Here we demonstrate that MPR300 shuttling between endosomes and the trans Golgi network is altered in α-synuclein overexpressing neurons. Consequently, CD is not correctly trafficked to lysosomes and cannot be processed to generate its mature active form, leading to a reduced CD-mediated α-synuclein degradation and α-synuclein accumulation in neurons. MPR300 is downregulated in brain from α-synuclein overexpressing animal models and in PD patients with early diagnosis. These data indicate MPR300 as crucial player in the autophagy-lysosomal dysfunctions reported in PD and pinpoint MRP300 as a potential biomarker for PD.
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Affiliation(s)
- Carmela Matrone
- Department of Biomedicine, Faculty of Health, Aarhus University, 8000 Aarhus C, Denmark
- * E-mail: ;
| | - Nicolas Dzamko
- Neuroscience Research Australia, Sydney, NSW 2031, and School of Medical Sciences, Faculty of Medicine, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Peder Madsen
- Department of Biomedicine, Faculty of Health, Aarhus University, 8000 Aarhus C, Denmark
- Research Initiative on Blood Brain and Drug Delivery, The Lundbeck Foundation, 8000 Aarhus C, Denmark
| | - Mette Nyegaard
- Department of Biomedicine, Faculty of Health, Aarhus University, 8000 Aarhus C, Denmark
| | - Regina Pohlmann
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, 48149 Münster, Germany
| | - Rikke V. Søndergaard
- Research Initiative on Blood Brain and Drug Delivery, The Lundbeck Foundation, 8000 Aarhus C, Denmark
- Department of Micro- and Nanotechnology, Technical University of Denmark (DTU) Nanotech, DTU, 2800 Lyngby, Denmark
| | - Louise B. Lassen
- Department of Biomedicine, Faculty of Health, Aarhus University, 8000 Aarhus C, Denmark
| | - Thomas L. Andresen
- Research Initiative on Blood Brain and Drug Delivery, The Lundbeck Foundation, 8000 Aarhus C, Denmark
- Department of Micro- and Nanotechnology, Technical University of Denmark (DTU) Nanotech, DTU, 2800 Lyngby, Denmark
| | - Glenda M. Halliday
- Neuroscience Research Australia, Sydney, NSW 2031, and School of Medical Sciences, Faculty of Medicine, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Poul Henning Jensen
- Department of Biomedicine, Faculty of Health, Aarhus University, 8000 Aarhus C, Denmark
| | - Morten S. Nielsen
- Department of Biomedicine, Faculty of Health, Aarhus University, 8000 Aarhus C, Denmark
- Research Initiative on Blood Brain and Drug Delivery, The Lundbeck Foundation, 8000 Aarhus C, Denmark
- * E-mail: ;
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Füchtbauer A, Lassen LB, Jensen AB, Howard J, Quiroga ADS, Warming S, Sørensen AB, Pedersen FS, Füchtbauer EM. Septin9 is involved in septin filament formation and cellular stability. Biol Chem 2012; 392:769-77. [PMID: 21824004 DOI: 10.1515/bc.2011.088] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Septin9 (Sept9) is a member of the filament-forming septin family of structural proteins and is associated with a variety of cancers and with hereditary neuralgic amyotrophy. We have generated mice with constitutive and conditional Sept9 knockout alleles. Homozygous deletion of Sept9 results in embryonic lethality around day 10 of gestation whereas mice homozygous for the conditional allele develop normally. Here we report the consequences of homozygous loss of Sept9 in immortalized murine embryonic fibroblasts. Proliferation rate was not changed but cells without Sept9 had an altered morphology compared to normal cells, particularly under low serum stress. Abnormal, fragmented, and multiple nuclei were more frequent in cells without Sept9. Cell migration, as measured by gap-filling and filter-invasion assays, was impaired, but individual cells did not move less than wild-type cells. Sept9 knockout cells showed a reduced resistance to hypo-osmotic stress. Stress fiber and vinculin staining at focal adhesion points was less prominent. Long septin filaments stained for Sept7 disappeared. Instead, staining was found in short, often curved filaments and rings. Furthermore, Sept7 was no longer localized to the mitotic spindle. Together, these data reveal the importance of Sept9 for septin filament formation and general cell stability.
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Uldall PV, Hansen FJ, Beck B, Buchholt JM, Knudsen FU, Lassen LB, Lee K, Taudorf K. [Guidelines on antiepileptic treatment of children]. Ugeskr Laeger 1998; 160:5675-6. [PMID: 9771069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Hansen LG, Høst A, Halken S, Holmskov A, Husby S, Lassen LB, Storm K, Osterballe O. Cord blood IgE. II. Prediction of atopic disease. A follow-up at the age of 18 months. Allergy 1992; 47:397-403. [PMID: 1456411 DOI: 10.1111/j.1398-9995.1992.tb02079.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Screening of total IgE in 2814 cord blood samples was analysed by Phadebas IgE PRIST in 2 1-year birth cohorts (1983-1984 and 1985-1986) in Denmark (n = 1189 + 1625). For follow-up we chose all infants with cord blood IgE greater than or equal to 0.5 kU/l and a randomly chosen group of the same size with cord blood IgE less than 0.5 kU/l. A total of 762 infants were clinically evaluated at 18 months of age. A diagnosis of definite atopy, probable atopy or no atopy, including both IgE and non-IgE mediated disease was established. Applying different cord blood IgE cut-off values (0.3, 0.5, 0.8, 1.1) we did not find an excess of atopic infants among those with elevated cord blood IgE irrespective of the chosen cut-off value. Atopic predisposition or family history of atopic disease was defined as at least one parent or older sibling with atopic disease. Significantly more infants with a family history developed atopy at 18 months. In the 2 series the positive predictive values of cord blood IgE greater than or equal to 0.5 were 43% and 46% and the sensitivities were 17% and 15%. The predictive values of having a family history were 48% and 44% and the sensitivities were 55% and 58%.
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Affiliation(s)
- L G Hansen
- Department of Pediatrics, Viborg Hospital, Denmark
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Hansen LG, Høst A, Halken S, Holmskov A, Husby S, Lassen LB, Storm K, Osterballe O. Cord blood IgE. III. Prediction of IgE high-response and allergy. A follow-up at the age of 18 months. Allergy 1992; 47:404-10. [PMID: 1456412 DOI: 10.1111/j.1398-9995.1992.tb02080.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Screening of total IgE in 2814 cord blood samples was analysed by Phadebas IgE PRIST in 2 1-year birth cohorts (1983-1984 and 1985-1986) in Denmark (n = 1189 + 1625). For follow-up we chose all infants with cord blood IgE greater than or equal to 0.5 kU/l and a randomly chosen group of the same size with cord blood IgE less than 0.5 kU/l. A total group of 762 infants were clinically evaluated at 18 months of age, and in 688 of these we evaluated total and specific IgE. A diagnosis of definite atopy, probable atopy or no atopy was established. In the present study we defined allergic disease as atopic disease combined with elevated total IgE. We found a statistically significant correlation between cord blood IgE and IgE at 18 months of age. Significantly more infants with elevated cord blood IgE had developed allergic disease at 18 months. A cut-off value of 0.3 kU/l for cord blood IgE was superior to the originally suggested 0.5 kU/l. Significantly more infants with elevated cord blood IgE had developed specific IgE antibodies at 18 months. The most frequent specific IgE antibody was towards cow's milk. Specific IgE antibodies were very rarely found when total IgE was not elevated. A total IgE at the age of 18 months greater than 26 kU/l could be regarded as elevated. With regard to allergic disease the positive predictive values of cord blood IgE greater than or equal to 0.3 kU/l in the 2 series were 21% and the corresponding sensitivities 67% and 46%, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- L G Hansen
- Department of Pediatrics, Viborg Hospital, Denmark
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Abstract
Screening of total IgE in 2814 cord blood samples was analysed by Phadebas IgE PRIST in 2 1-year birth cohorts (1983-1984 and 1985-1986) in Denmark (n = 1189 + 1625). 48.6% of the sera contained less IgE than the detection limit 0.1 kU/l. Cord blood IgE values greater than or equal to 0.5 kU/l were regarded as elevated. 13.2% of the sera contained at least 0.5 kU/l of IgE, with a significant preponderance in boys. Geometric mean cord blood IgE was 0.13 kU/l and 0.12 kU/l, respectively. Geometric mean cord blood IgE was significantly higher in boys. A significant seasonal variation with lowest IgE values in the autumn was found. No correlation between cord blood IgE and birth weight or gestational age was demonstrated. Only few newborns had cord blood IgA values greater than 0.014 g/l, calculated as geometric mean cord blood IgA + 2 SD among children with no detectable cord blood IgE, indicating infrequent contamination with maternal blood.
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Affiliation(s)
- L G Hansen
- Department of Pediatrics, Odense University Hospital, Denmark
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Olsen LH, Genster HG, Mosegaard A, Jørgensen FS, Hofman N, Jensen VB, Lassen LB, Rassmussen M, Vinzents L, Dammegaard L. Management of the non-descended testis: doubtful value of luteinizing-hormone-releasing-hormone (LHRH). A double-blind, placebo-controlled multicentre study. ACTA ACUST UNITED AC 1992; 15:135-43. [PMID: 1349301 DOI: 10.1111/j.1365-2605.1992.tb01122.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In a double-blind, placebo-controlled multicentre study, the effect of luteinizing-hormone-releasing-hormone (LHRH) in 141 boys was analysed after 4-week treatment period with 0.4 mg LHRH nasal spray or placebo nasal spray three times daily. Data from 123 boys was analysed, with 62 boys in the treatment group and 61 in the placebo group. Full response i.e. the testis at the bottom of the scrotum on both sides in boys with bilaterally undescended testes, was found in six patients, one of them in the placebo group [Therapeutic gain of LHRH with 95% CI: 8.1% (0.1-16.6%, P = 0.12)]. Only in these boys could surgery be avoided. Considering the number of testes (and not the number of boys) a significant effect was found on at least one testis in 25% of boys with bilaterally undescended testes [Therapeutic gain with 95% CI: 24.0% (13.2-34.8%, P = 0.001)]. In unilateral undescended testes, the LHRH treatment showed no effect (P = 1.00). The inclusion of retractile testes did not affect our results. In our opinion LHRH has a limited place in treatment of the non-descended testis.
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Affiliation(s)
- L H Olsen
- Department of Paediatrics, Silkeborg Hospital, Esbjerg Hospital, Denmark
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Bondesen S, Nielsen OH, Schou JB, Jensen PH, Lassen LB, Binder V, Krasilnikoff PA, Danø P, Hansen SH, Rasmussen SN. Steady-state kinetics of 5-aminosalicylic acid and sulfapyridine during sulfasalazine prophylaxis in ulcerative colitis. Scand J Gastroenterol 1986; 21:693-700. [PMID: 2875518 DOI: 10.3109/00365528609011102] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Fifteen adult and 19 pediatric outpatients with ulcerative colitis were studied to determine the steady-state kinetics of 5-aminosalicylic acid (5-ASA) released from salazosulfapyridine (SASP). Results of excretion in adults (mean 24-h recovery of 5-ASA, 21% in urine and 57% in feces) were compatible with those of healthy volunteers. Since mean SASP dose/kg body weight (about 50 mg/kg) and compliance (reflected in sulfapyridine recovery) were equal in adults and pediatric patients, the results of the patient groups could be compared. Near-complete azo reduction of SASP occurs in children. Absorption and excretion of 5-ASA and metabolism to acetyl-5-ASA did not differ statistically between pediatric and adult patients. However, the fecal excretion of the drug and its metabolites was significantly lower in young patients, although fecal concentrations were the same. The present results demonstrate that SASP is an excellent sustained-release drug for the delivery of 5-ASA to the lower part of the bowel system and provide a reference for comparison of 5-ASA kinetics after treatment with newer 5-ASA preparations.
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Storm K, Lassen LB, Herlin T. [Bartter's syndrome in 2 triplet sisters treated for 7 years with indomethacin]. Ugeskr Laeger 1986; 148:654-5. [PMID: 3961953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Boesen AM, Ellegaard J, Hokland P, Lassen LB. Subclassification in acute lymphoblastic leukaemia: acid phosphatase reaction and immunological markers in relation to clinical features. A comparative study of 44 patients. Scand J Haematol 1981; 27:87-98. [PMID: 6950496 DOI: 10.1111/j.1600-0609.1981.tb00457.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [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
A prospective, comparative study of cytochemical and immunological markers and clinical features was undertaken in 44 patients with ALL (children and adults). 12 patients (27%) had T-ALL, 1 patient (2%) B-ALL and 31 patients (71%) (non-T, non-B)-All. E-rosetting lymphoblasts ranged from 35 to 96% (median: 61), highest when AET-treated SRBC were used as indicator cells. All 12 E-rosette positive cases were strongly acid phosphatase (AcP)-positive, showing a homogeneous pattern of distinct granular AcP-activity in more than 85% of the lymphoblasts (median: 96%) significantly different from the median of 26% granulated blasts found in (non-T, non-B)-ALL cases. Counting blasts with granular AcP-activity proved to be both easier than using a scoring system for the AcP-reaction and more efficient in terms of discriminating ability between the subgroups. Significant clinical and haematological features characterizing the T- and AcP-positive cases included: (1) Predominance of young adult men, (2) presence of a mediastinal mass, (3) involvement of skin and serous membranes, (4) only slightly affected haemoglobin concentration at presentation, (5) difficulty in obtaining complete remission, (6) shorter duration of first complete remission and (7) shorter survival rate. It is confirmed that AcP-staining of lymphoblasts is an easy, reproducible and inexpensive method for identifying the T-cell variety of ALL.
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Illum F, Dupont E, Dupont A, Jensen SB, Frederiksen PK, Konstantin-Hasen KK, Lassen LB. [Pseudohypoparathyroidism. Recent diagnostic aspects]. Ugeskr Laeger 1980; 142:2606-10. [PMID: 6255648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Sørensen K, Nielsen J, Busch P, Hamborg-Petersen B, Hansen E, Lassen LB, Nielsen K, Poulsen JP, Rossen K, Schaap SK, Taudorf K, Thelle T, Vestermark S, Vrang C. [Measurement of testicular volume with Prader's orchiometer in 1,389 boys 5--15 1/2 years old]. Ugeskr Laeger 1979; 141:915-8. [PMID: 425192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Nielsen J, Rasmussen K, Lassen LB, Christansen F. A family with a high risk of segregation for an autosomal unbalanced reciprocal translocation. Hum Genet 1976; 32:343-8. [PMID: 939554 DOI: 10.1007/bf00295827] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A family with autosomal reciprocal translocation t(4;13) (q25;a31) with a sibship comprising 2 children with unbalanced karyotypes, der(13) partial trisomy 4q, 1 child with the balanced translocation, and 2 abortions were studied. The segregation risk of unbalanced derivation in reciprocal translocations is discussed. The clinical picture of the 2 children with partial trisomy 4q is compared with similar cases.
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