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Sökning: WFRF:(von Schantz M) > (2000-2004) > Absence of phosphog...

  • Archer, SN (författare)

Absence of phosphoglucose isomerase-1 in retinal photoreceptor, pigment epithelium and Muller cells

  • Artikel/kapitelEngelska2004

Förlag, utgivningsår, omfång ...

  • 2004

Nummerbeteckningar

  • LIBRIS-ID:oai:lup.lub.lu.se:f1403c86-fcad-479b-aa46-e42c358f495c
  • https://lup.lub.lu.se/record/276637URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:art swepub-publicationtype
  • Ämneskategori:ref swepub-contenttype

Anmärkningar

  • Macroarray analysis was used to compare equal amounts of cDNA from wild-type and rd/rd (retinal degeneration) mice, collected at P90 when photoreceptor degeneration is virtually complete. A stronger signal for the glycolytic enzyme phosphoglucose isomerase (Gpi1) was observed in the rd/rd sample. Extracellularly, Gpi1 may act as a cytokine, independently described as neuroleukin and autocrine motility factor. Retinal Gpi1 expression was investigated by Northern and Western blot analysis and immunohistochemistry. Double-labelling was performed with antibodies against Gpi1 and calbindin-D, glutamine synthetase, RPE65, calretinin and ultraviolet opsin in order to provide positive cell type identification. Northern and Western blots showed double expression levels per microgram of RNA and protein, respectively, in the rd/rd retina compared with wild-type. However, the total amount of Gpi1 protein per retina was indistinguishable. Gpi1 immunoreactivity was found in ganglion, amacrine, horizontal and bipolar cells, but not in rods, cones, pigment epithelium and Muller cells. This distribution explains why the absolute amounts of Gpi1 protein were not appreciably different between wild-type and the rd/rd phenotype, where rods and cones are absent, whilst the relative contribution of Gpi1 to the total protein and RNA pools differed. Some extracellular immunoreactivity was observed in the photoreceptor matrix around cones in freshly fixed tissue only, which could possibly reflect a role as a cytokine. We propose that glycolysis in Gpi1-negative cells proceeds entirely through the pentose phosphate pathway, creating NADPH at the cost of organic carbon. We hypothesize that the unique metabolic needs of photoreceptors justify this trade-off.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Ahuja Jensen, PoonamLund University,Lunds universitet,Allmänmedicin och samhällsmedicin,Forskargrupper vid Lunds universitet,Family Medicine and Community Medicine,Lund University Research Groups(Swepub:lu)oft-pah (författare)
  • Caffé, RomeoLund University,Lunds universitet,Oftalmologi, Lund,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Ophthalmology, Lund,Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine(Swepub:lu)oft-rca (författare)
  • Mikol, C (författare)
  • Foster, RG (författare)
  • van Veen, TheoLund University,Lunds universitet,Oftalmologi, Lund,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Ophthalmology, Lund,Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine(Swepub:lu)oft-tve (författare)
  • von Schantz, M (författare)
  • Allmänmedicin och samhällsmedicinForskargrupper vid Lunds universitet (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:European Journal of Neuroscience19:11, s. 2923-29301460-9568

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