Ist Aquaporin-9 bei Gestationsdiabetes ein Marker für ungünstigen Stoffwechsel?

2021 ◽  
Vol 15 (5) ◽  
pp. 20-22
Author(s):  
Jens H. Stupin
Keyword(s):  
Aquaporin 9

scholarly journals Aquaporin-1 and aquaporin-9 gene variations in sudden infant death syndrome

2021 ◽  
Author(s):  
Siri Hauge Opdal ◽  
Linda Ferrante ◽  
Torleiv Ole Rognum ◽  
Arne Stray-Pedersen
Keyword(s):  
Sudden Infant Death Syndrome ◽  
Infant Death ◽  
Brain Function ◽  
Sudden Infant Death ◽  
Sudden Infant ◽  
Unexpected Death ◽  
Aquaporin 9 ◽  
Genes Encoding ◽  
External Risk ◽  
The Brain

AbstractSeveral studies have indicated that a vulnerability in the development and regulation of brain function is involved in sudden infant death syndrome (SIDS). The aim of this study was to investigate the genes encoding the brain aquaporins (AQPs) AQP1 and AQP9 in SIDS. The hypothesis was that specific variants of these genes are part of the genetic vulnerability predisposing infants to sudden unexpected death. The study included 168 SIDS cases with a median age of 15.5 (range 2–52) weeks and 372 adolescent/adult deceased controls with a median age of 44 (range 11–91) years. In the AQP1 gene, the rs17159702 CC/CT genotypes were found to be associated with SIDS (p = 0.02). In the AQP9 gene, the combination of a TT genotype of rs8042354, rs2292711 and rs13329178 was more frequent in SIDS cases than in controls (p = 0.03). In the SIDS group, an association was found between genetic variations in the AQP1 gene and maternal smoking and between the 3xTT combination in the AQP9 gene and being found lifeless in a prone position. In conclusion, this study adds further evidence to the involvement of brain aquaporins in SIDS, suggesting that specific variants of AQP genes constitute a genetic predisposition, making the infant vulnerable to sudden death together with external risk factors and probably other genetic factors.

scholarly journals Using kICS to Reveal Changed Membrane Diffusion of AQP-9 Treated with Drugs

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 568
Author(s):  
Jakob L. Kure ◽  
Thommie Karlsson ◽  
Camilla B. Andersen ◽  
B. Christoffer Lagerholm ◽  
Vesa Loitto ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Plasma Membrane ◽  
Membrane Proteins ◽  
Actin Polymerization ◽  
Correlation Spectroscopy ◽  
Image Correlation ◽  
Membrane Diffusion ◽  
Hek 293 ◽  
293 Cells ◽  
Aquaporin 9

The formation of nanodomains in the plasma membrane are thought to be part of membrane proteins regulation and signaling. Plasma membrane proteins are often investigated by analyzing the lateral mobility. k-space ICS (kICS) is a powerful image correlation spectroscopy (ICS) technique and a valuable supplement to fluorescence correlation spectroscopy (FCS). Here, we study the diffusion of aquaporin-9 (AQP9) in the plasma membrane, and the effect of different membrane and cytoskeleton affecting drugs, and therefore nanodomain perturbing, using kICS. We measured the diffusion coefficient of AQP9 after addition of these drugs using live cell Total Internal Reflection Fluorescence imaging on HEK-293 cells. The actin polymerization inhibitors Cytochalasin D and Latrunculin A do not affect the diffusion coefficient of AQP9. Methyl-β-Cyclodextrin decreases GFP-AQP9 diffusion coefficient in the plasma membrane. Human epidermal growth factor led to an increase in the diffusion coefficient of AQP9. These findings led to the conclusion that kICS can be used to measure diffusion AQP9, and suggests that the AQP9 is not part of nanodomains.

Aquaporin 9 is expressed in the epididymis of immature and mature pigs

2017 ◽  
Vol 52 (4) ◽  
pp. 617-624 ◽  
Author(s):  
BC Schimming ◽  
CAE Baumam ◽  
PFF Pinheiro ◽  
R de Matteis ◽  
RF Domeniconi
Keyword(s):  
Aquaporin 9

Fetal membranes as an interface between inflammation and metabolism: Increased Aquaporin 9 expression in the presence of spontaneous labor at term and chorioamnionitis

2009 ◽  
Vol 22 (12) ◽  
pp. 1167-1175 ◽  
Author(s):  
Pooja Mittal ◽  
Roberto Romero ◽  
Shali Mazaki-Tovi ◽  
Gerard Tromp ◽  
Adi L. Tarca ◽  
...  
Keyword(s):  
Fetal Membranes ◽  
Aquaporin 9

The role of Aquaporin 9 in Modeling of Ornithine Transcarbamylase Deficiency

Hepatology ◽  
2021 ◽  
Author(s):  
Jun‐Wei Zhang ◽  
Quan‐Cheng Cheng ◽  
Hui‐Ru Ding ◽  
Lei Zhang ◽  
Yi‐Yao Xu ◽  
...  
Keyword(s):  
Ornithine Transcarbamylase ◽  
Ornithine Transcarbamylase Deficiency ◽  
Aquaporin 9

scholarly journals Aqp9 Gene Deletion Enhances Retinal Ganglion Cell (RGC) Death and Dysfunction Induced by Optic Nerve Crush: Evidence that Aquaporin 9 Acts as an Astrocyte-to-Neuron Lactate Shuttle in Concert with Monocarboxylate Transporters To Support RGC Function and Survival

2020 ◽  
Vol 57 (11) ◽  
pp. 4530-4548 ◽  
Author(s):  
Sotaro Mori ◽  
Takuji Kurimoto ◽  
Akiko Miki ◽  
Hidetaka Maeda ◽  
Sentaro Kusuhara ◽  
...  
Keyword(s):  
Optic Nerve ◽  
Ganglion Cell ◽  
Gene Deletion ◽  
Monocarboxylate Transporters ◽  
Optic Nerve Crush ◽  
Retinal Ganglion ◽  
Nerve Crush ◽  
Lactate Shuttle ◽  
Glucose Transporter 1 ◽  
Aquaporin 9

Abstract Aquaporin 9 (AQP9) is an aquaglyceroporin that can transport lactate. Accumulating evidence suggests that astrocyte-to-neuron lactate shuttle (ANLS) plays a critical role in energy metabolism in neurons, including retinal ganglion cells (RGCs). To test the hypothesis that AQP9, in concert with monocarboxylate transporters (MCTs), participates in ANLS to maintain function and survival of RGCs, Aqp9-null mice and wild-type (WT) littermates were subjected to optic nerve crush (ONC) with or without intravitreal injection of an MCT2 inhibitor. RGC density was similar between the Aqp9-null mice and WT mice without ONC, while ONC resulted in significantly more RGC density reduction in the Aqp9-null mice than in the WT mice at day 7. Positive scotopic threshold response (pSTR) amplitude values were similar between the two groups without ONC, but were significantly more reduced in the Aqp9-null mice than in the WT mice 7days after ONC. MCT2 inhibitor injection accelerated RGC death and pSTR amplitude reduction only in the WT mice with ONC. Immunolabeling revealed that both RGCs and astrocytes expressed AQP9, that ONC predominantly reduced astrocytic AQP9 expression, and that MCTs 1, 2, and 4 were co-localized with AQP9 at the ganglion cell layer. These retinal MCTs were also co-immunoprecipitated with AQP9 in the WT mice. ONC decreased the co-immunoprecipitation of MCTs 1 and 4, but did not impact co-immunoprecipitation of MCT2. Retinal glucose transporter 1 expression was increased in Aqp9-null mice. Aqp9 gene deletion reduced and increased the intraretinal l-lactate and d-glucose concentrations, respectively. Results suggest that AQP9 acts as the ANLS to maintain function and survival of RGCs.

scholarly journals Integrated analysis identifies AQP9 correlates with immune infiltration and acts as a prognosticator in multiple cancers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Xiaohong Liu ◽  
Qian Xu ◽  
Zijing Li ◽  
Bin Xiong
Keyword(s):  
Survival Data ◽  
Integrated Analysis ◽  
Immune Gene ◽  
Gene Markers ◽  
Lung Cancers ◽  
Immune Infiltration ◽  
Kaplan Meier ◽  
Aquaporin 9 ◽  
Infiltrating Cells ◽  
The Relationship

AbstractAquaporin 9 (AQP9), as an aquaglyceroporin, is expressed in many immune cells and plays important role in tumor initiation and progression. However, the relationship between AQP9 and tumor-infiltrating cells, and its prognostic value in cancers still require comprehensive understanding. Herein, we aimed to elucidate the correlations of AQP9 with prognosis and immune infiltration levels in diverse cancers. We detected the expression and survival data of AQP9 through Oncomine, TIMER, Kaplan–Meier Plotter and PrognoScan databases. The correlations between AQP9 and immune infiltrates were analyzed in TIMER database. Our results found that high AQP9 expression was significantly correlated with worse prognosis in breast, colon and lung cancers, while predicted better prognosis in gastric cancer. Moreover, AQP9 had significant association with various immune infiltrating cells including CD8+ and CD4+ T cells, neutrophils, macrophages and dendritic cells (DCs), and diverse immune gene markers in BRCA, COAD, LUAD, LUSC and STAD. AQP9 was also significantly correlated with the regulation of tumor associated macrophages (TAM). These results indicate that AQP9 can play as a significant biomarker to determine the prognosis and the immune infiltrating levels in different cancers. It might also contribute to the development of the immunotherapy in breast, colon, lung and gastric cancers.

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