کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1998848 | 1065821 | 2009 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of cisternal sulfamidase delivery in MPS IIIA Huntaway dogs-A proof of principle study
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کلمات کلیدی
2,2′-Azino-bis(3-ethylbenzthiazoline-6-sulfonic acidSGSHLSDABTSSanfilippoMucopolysaccharidosis type IIIAMPS IIIAenzyme replacement therapy - آنزیم جایگزین درمانLysosomal storage disorder - اختلال ذخیره سازی لیزوزومیELISA - تست الیزاEnzyme-linked immunosorbent assay - تست الیزاSulfamidase - سولفامیدازCSF - مایع مغزی نخاعیCerebrospinal fluid - مایع مغزی نخاعیERT - هستندHeparan sulfate - هپاران سولفاتhigh performance liquid chromatography - کروماتوگرافی مایع با کارایی بالاHPLC - کروماتوگرافی مایعی کارا
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Mucopolysaccharidosis type IIIA (MPS IIIA) results from lack of functional sulfamidase (SGSH), a lysosomal enzyme. Its substrate, heparan sulfate, and other secondarily-stored compounds subsequently accumulate primarily within the central nervous system (CNS), resulting in progressive mental deterioration and early death. Presently there is no treatment. As a potential therapeutic strategy, recombinant human sulfamidase (rhSGSH) was administered into the CSF (via the cerebellomedullary cistern) of three adult MPS IIIA dogs either twice with a 4Â day interval, or weekly for up to 4Â weeks. The dogs were euthanased 24Â h post-injection along with one untreated unaffected and two MPS IIIA controls. We have examined the three dimensional pattern of distribution of enzyme in the CNS and its ability to reduce primary substrate storage. High concentrations of rhSGSH protein, with up to 39-fold normal enzyme activity levels were detected within widespread areas of the CNS. RhSGSH protein was also detectable by immunohistochemistry in neurons and glia in all three enzyme-treated dogs. In both weekly-treated dogs, relative levels of a heparan sulfate-derived disaccharide, measured using tandem mass spectrometry, were lower in many brain regions when compared to untreated MPS IIIA controls. A moderately severe meningitis was also present as well as antibodies to rhSGSH in CSF/plasma. These findings demonstrate proof of principle that MPS IIIA can be treated by intracisternal enzyme replacement warranting further experiments in animals tolerant to rhSGSH. This enzyme delivery method may represent a means of treating neuropathology in MPS IIIA and other lysosomal storage disorders affecting the CNS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Genetics and Metabolism - Volume 98, Issue 4, December 2009, Pages 383-392
Journal: Molecular Genetics and Metabolism - Volume 98, Issue 4, December 2009, Pages 383-392
نویسندگان
Kim M. Hemsley, Elizabeth J. Norman, Allison C. Crawley, Dyane Auclair, Barbara King, Maria Fuller, Debbie L. Lang, Caroline J. Dean, Robert D. Jolly, John J. Hopwood,