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fredag 11 januari 2019

Mikä geenitausta on hyperfosfatemisen tumoraalin kalsinoosin takana?

1.  hakusana Hyperphosphataemic tumoral calcinosis
2. Ilmenee geeni GLNT3 mutaatioita   Katon lopuksi GALNT3 geenin ihmisellä

2007

2006 Nov;91(11):4472-5. Epub 2006 Aug 29.
Tumoral calcinosis presenting with eyelid calcifications due to novel missense mutations in the glycosyl transferase domain of the GALNT3 gene.

2009

2009 Jun;150(6):2543-50. doi: 10.1210/en.2008-0877. Epub 2009 Feb 12.
Ablation of the Galnt3 gene leads to low-circulating intact fibroblast growth factor 23 (Fgf23) concentrations and hyperphosphatemia despite increased Fgf23 expression.

 2011

https://www.ncbi.nlm.nih.gov/pubmed/22009723/
2011 Dec;152(12):4504-13. doi: 10.1210/en.2011-1137. Epub 2011 Oct 18.
Dietary phosphate restriction normalizes biochemical and skeletal abnormalities in a murine model of tumoral calcinosis.
 
2014 
 

2014 Sep 24;15:98. doi: 10.1186/s12863-014-0098-3.
Long-term clinical outcome and phenotypic variability in hyperphosphatemic familial tumoral calcinosis and hyperphosphatemic hyperostosis syndrome caused by a novel GALNT3 mutation; case report and review of the literature.
 
 2015 

2015 Apr;13(2):78-87. doi: 10.1007/s11914-015-0254-3.
Hyperphosphatemic familial tumoral calcinosis: genetic models of deficient FGF23 action.
 
 2016

 https://www.ncbi.nlm.nih.gov/pubmed/27164190
2016 Oct;31(10):1845-1854. doi: 10.1002/jbmr.2870. Epub 2016 Sep 20.
Phenotypic and Genotypic Characterization and Treatment of a Cohort With Familial Tumoral Calcinosis/Hyperostosis-Hyperphosphatemia Syndrome.
 
 

Oxfordilainen dieettiohje fosfaattia (Pi) rajoittavasta dieetissä

https://www.ouh.nhs.uk/oku/patient-advice/documents/phosphate-diet.pdf
Tämä oxfordilainen  artikkeli pyrkii  epäorgaanisen fosfaatin alentamiseen eikä  hienosäätele  erikseen insoitolifosfaatin suhteen, ainoastaan  suosittelee  siihen suuntaan  viitaten  kasviperäiseen  ravintoa, jossa inositolifosfaattia voi onnistua saamaan.

 https://www.ouh.nhs.uk/oku/patient-advice/documents/phosphate-diet.pdf
On itseasiassa  paradigman muutosta jos  inositolifosfaatti (IP6 ja IP3)  aletaan ottaa  fosfaattiaineenvaihdunnan terapiassa huomioon. 

Hyperfosfateminen tumoröösi kalsinoosi (Lancet uutinen)

 Lancet  Numero 10167, Vol 393. Jan 12, 2019 
Lehti kuvaa  havinaisen potilastapauksen.
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(18)33045-9/fulltext?rss=yes
18-vuotiaalla nuorella miehellä 1 vuoden kestäneiden vasemman  lonkan alueen vaivan selvittelyssä  lopulta  hyperfosfateminen tuumorin muodostanut  kalsinoosi. 
Mitään traumaa ei ollut anamneesissa ei myöskään mitään autoimmuunisiin häiriöihin viitaavaa.  Tuumorimassa isontrokanterin seudussa oli lisäksi paloiden aristavaa ja rajoitti nivelen liikuntaa, lonkan  rotaatiota ja abduktiota.  Aiemmassa omassa ja perheanamneesissa ei ollut  syitä selvittävää.  Tgasoröntgentutkimus ja tietokonetomografia selvittivä  molemmin puolisen, bilateraalisen, vierasvarjon, joka oli  periartikulaarinen, lohkoinen, kalkkiutunut pehmytosamassa - vasemmalla  tämä röäntgenologinen löytö oli selvempi kuin oikella. 
Nyt selvitettiin seerumia:  S-urfea, kreatiniini, virtsahappo, kokonaiskalsium, alkaalinen fosfaatti ja PTH( paratyreoideahormoni) - nämä kaikki olvat normaaleita.
 Sensijaan  seeurin epäorgaaninen fosfaatti (Pi) oli koholla: 2- 19 mmol/L. ( Normaalialue on 0.81- 1.45 mmol/l).
 Munuaisen tubulaarinen  maksimaalinen  fosfaatin reabsorptiotahti korjattuna glomerulaarisen  filtraation suhteen  oli myös koholla  2-16 mmol/L ( normaalialue on 1.07- 1.89 mmol/L)  ja tämä  viittasi munuaisen kohonneeseen tubulaariseen fosfaatin takaisin absorptioon
Ottaen huomioon potilaan iän ja  lonkkaseudun bilateraaliset , periartikulaarisessa pehmeässä  kudoksessa sijaitsevat, kalkkiutuneet massat , fosfaatin reabsorptioon liittyneen hyperfosfatemian  ja sekundäärisistä  tai muista syistä   ektooppisiin kalkkiutumiin johtavien seikkojen puuttumisen potilaan diagnoosiksi asetettiin  hyperfosfateminen tumoraali kalsinoosi. 
Tehtiin oireenmukainen  vasemman puolisen massan kirurginen  poisto. Operaaation aikana havaittiin  kystistä massaa, jonka sisällä oli liituista  valkoista materiaalia . Histologinen tutkimus osoitti amorfista kalkkiutunutta jyväistä materiaalia, jota ympäröi histiosyytti- ja jättisolureaktio, mikä vahvisti diagnoosin. 
Operaation jälkeen  tehtiin yrityksiä alentaa veren fosfaattipitoisuutta käyttäen kombinoidusti  fosfaattiredusoitua dieettiä  ja  alle 800 mg tablettia   kalsiumitonta   fosfaatin sitojaa  sevelamerihydrokloridia, joka sitää suolistossa fosfaattia, sekä  p.o. asetatsolamidia , joka indusoi fosfaturiaa.

  • Postoperatively, attempts were made to lower the patient's blood phosphate concentration using a combination of a phosphate-restricted diet with less than 800 mg/day tablets of the non-calcium-based phosphate binder, sevelamer hydrochloride—which binds phosphate in the intestine, and oral acetazolamide to induce phosphaturia.

  • An 18-year-old man presented to our department with a 1-year history of pain in the region of his left hip and difficulty in squatting. He reported no history of any local trauma. There was no history suggestive of an autoimmune disorder. Clinical examination found a tender, hard mass in the left greater trochanteric region with painful, restricted rotation and abduction movements of the hip. Both his medical history and family history were unremarkable. Plain x-ray and CT scans of the pelvis ( figure) showed bilateral—left greater than the right—and periarticular, lobulated, calcific, soft tissue masses. Serum urea, creatinine, uric acid, total calcium, alkaline phosphate, and parathyroid hormone concentrations were normal. However, serum inorganic phosphorus was elevated at 2·10 mmol/L (normal range 0·81–1·45 mmol/L). The ratio of the renal tubular maximum reabsorption rate of phosphate to corrected glomerular filtration rate was also elevated at 2·16 mmol/L (normal range 1·07–1·89 mmol/L), suggestive of increased renal tubular phosphate reabsorption.
  •  Considering the patient's age, presence of bilateral, and periarticular soft tissue, calcific masses about the hip, hyperphosphataemia with increased tubular phosphate reabsorption, and the absence of indications that the ectopic calcification was secondary to any other causes, the patient was diagnosed with hyperphosphataemic tumoral calcinosis. 
  • The symptomatic, left-sided mass was surgically excised: during the operation it appeared as a cystic mass containing chalky white material. Histological examination showed amorphous and granular calcified material surrounded by histiocytic and giant cell reaction—confirming the diagnosis. Postoperatively, attempts were made to lower the patient's blood phosphate concentration using a combination of a phosphate-restricted diet with less than 800 mg/day tablets of the non-calcium-based phosphate binder, sevelamer hydrochloride—which binds phosphate in the intestine, and oral acetazolamide to induce phosphaturia.

fredag 30 november 2018

Human NUDIX genes

https://www.ncbi.nlm.nih.gov/pubmed/29142246

Abstract

The NUDIX enzymes are involved in cellular metabolism and homeostasis, as well as mRNA processing. Although highly conserved throughout all organisms, their biological roles and biochemical redundancies remain largely unclear. To address this, we globally resolve their individual properties and inter-relationships. We purify 18 of the human NUDIX proteins and screen 52 substrates, providing a substrate redundancy map. Using crystal structures, we generate sequence alignment analyses revealing four major structural classes. To a certain extent, their substrate preference redundancies correlate with structural classes, thus linking structure and activity relationships. To elucidate interdependence among the NUDIX hydrolases, we pairwise deplete them generating an epistatic interaction map, evaluate cell cycle perturbations upon knockdown in normal and cancer cells, and analyse their protein and mRNA expression in normal and cancer tissues. Using a novel FUSION algorithm, we integrate all data creating a comprehensive NUDIX enzyme profile map, which will prove fundamental to understanding their biological functionality.
PMID:
29142246
PMCID:
PMC5688067
DOI:
10.1038/s41467-017-01642-w

NUDT22(11q13.1) UDP-glucose- and UDP-galactose hydrolase

https://www.ncbi.nlm.nih.gov/gene/84304

Expression
Ubiquitous expression in duodenum (RPKM 16.3), spleen (RPKM 14.4) and 25 other tissues See more
Orthologs

Related articles in PubMed

NUDT21 (16q13), CFIM, CPSFS , cleavage and polyadenylation specifity factor subunit 5

https://www.ncbi.nlm.nih.gov/gene/11051
 The protein encoded by this gene is one subunit of a cleavage factor required for 3' RNA cleavage and polyadenylation processing. The interaction of the protein with the RNA is one of the earliest steps in the assembly of the 3' end processing complex and facilitates the recruitment of other processing factors. This gene encodes the 25kD subunit of the protein complex, which is composed of four polypeptides. [provided by RefSeq, Jul 2008]
Preferred Names
cleavage and polyadenylation specificity factor subunit 5
Names
CPSF 25 kDa subunit
cleavage and polyadenylation specific factor 5, 25 kD subunit
cleavage and polyadenylation specific factor 5, 25 kDa
cleavage and polyadenylation specificity factor 25 kDa subunit
cleavage factor Im complex 25 kDa subunit
nucleoside diphosphate-linked moiety X motif 21
nudix (nucleoside diphosphate linked moiety X)-type motif 21
nudix motif 21
pre-mRNA cleavage factor Im (25kD)
pre-mRNA cleavage factor Im 25 kDa subunit
pre-mRNA cleavage factor Im 68 kDa subunit
pre-mRNA cleavage factor Im, 25kD subunit


Related articles in PubMed

mRNA decapping , Multiplle decapping enzymes exist

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1939969/

Best matches for mRNA decapping:

Grudzien-Nogalska E et al. Wiley Interdiscip Rev RNA. (2017)
 Abstract
Removal of the 5' end cap is a critical determinant controlling mRNA stability and efficient gene expression. Removal of the cap is exquisitely controlled by multiple direct and indirect regulators that influence association with the cap and the catalytic step. A subset of these factors directly stimulate activity of the decapping enzyme, while others influence remodeling of factors bound to mRNA and indirectly stimulate decapping. Furthermore, the components of the general decapping machinery can also be recruited by mRNA-specific regulatory proteins to activate decapping. 

 The Nudix hydrolase, Dcp2, identified as a first decapping enzyme, cleaves capped mRNA and initiates 5'-3' degradation. Extensive studies on Dcp2 led to broad understanding of its activity and the regulation of transcript specific decapping and decay.
 Interestingly, seven additional Nudix proteins possess intrinsic decapping activity in vitro and at least two, Nudt16 and Nudt3, are decapping enzymes that regulate mRNA stability in cells.

Furthermore, a new class of decapping proteins within the DXO family preferentially function on incompletely capped mRNAs. Importantly, it is now evident that each of the characterized decapping enzymes predominantly modulates only a subset of mRNAs, suggesting the existence of multiple decapping enzymes functioning in distinct cellular pathways.
 WIREs RNA 2017, 8:e1379. doi: 10.1002/wrna.1379 For further resources related to this article, please visit the WIREs website.PMID:27425147PMCID:PMC5179306DOI:10.1002/wrna.1379
 
D'Lima NG et al. Nat Chem Biol. (2017)
 
Valkov E et al. Curr Opin Struct Biol. (2017)