Recombinant Human Claudin-4 (CLDN4)-Detergent

1. Claudin-4 expression can be absent or very focal in a subset of high-grade endometrial carcinomas PMID: 29671892
2. these results suggest that Helicobacter pylori lipopolysaccharide induces TLR2 expression in the gastric adenocarcinoma cells, and that the longer the exposure to lipopolysaccharide, the greater the expression of TLR2 in the cell membrane; consequently the expression of claudin-4, -6, -7 and -9 also increases PMID: 29031421
3. HIF-1alpha expression was upregulated in the vasculogenic mimicry-positive CRC cell line HCT-116 and thereby affected the expression of the EMT-related markers Claudin-4, E-cadherin (E-cd) and Vimentin(VIM). PMID: 27869227
4. expression of claudin-4 is highly specific for true epithelial differentiation and may be useful to distinguish SWI/SNF complex-deficient undifferentiated carcinomas from sarcomas with epithelioid morphology. The lack of claudin-4 expression in ovarian small cell carcinomas of hypercalcemic type suggests that these tumors may be better regarded as sarcomas rather than carcinomas. PMID: 28084340
5. Data indiate a regulatory network in gastric cancer whereby claudin-4 expression is reduced by specific miRNAs, which are in turn bound by specific lncRNAs acting as competing endogenous RNAs (ceRNAs), resulting in increased claudin-4 expression. PMID: 28819095
6. This is the first study to show how TGF-beta regulates the expression of Claudin-4 through c-Jun signaling and how this pathway contributes to the migratory and tumorigenic phenotype of lung tumor cells. PMID: 27424491
7. Claudin-4 functionally contributes to both ovarian tumor cell apoptosis resistance and migration and targeting extracellular loop interactions of claudin-4 may have therapeutic implications for reducing ovarian tumor burden. PMID: 27724921
8. Fluorescence-based flow cytometry and xenon magnetic resonance imaging (MRI) indicate binding of the biosensor specifically to claudin 4 (Cldn4)-expressing cells. PMID: 28636798
9. Studies indicate that Grainyhead-like transcription factor 2 (GRHL2) controls the expression of E-cadherin (CDH1) required for adherens junctions and possibly regulates the expression of claudin-4 (CLDN4) in tight junctions. PMID: 28636799
10. Studies indicate claudin 1 (CLDN-1) as a target for improving epidermal drug absorption and preventing HCV infection and of claudin 4 (CLDN-4) as a target for anticancer therapeutics. PMID: 28415141
11. Mislocalization claudin-3 to nucleus in colon cancer and mislocalization claudin-4 to nucleus in adenomas of the colon were detected for the first time. The potential reasons for the paradoxical expression are discussed and a review of the literature, related all the alleged mechanisms of this mislocalization is provided. PMID: 28295005
12. Reg I may play a role in the maintenance of mucosal barrier function by inducing tight junction proteins such as claudins 3 and 4. PMID: 27055226
13. claudin-4 may represent different mechanisms of lymphatic vessel invasion with both biomarkers is related to poor prognosis PMID: 26464161
14. These results suggested that increase of Cldn4-expression may be involved in early molecular events during carcinogenesis of adenocarcinoma, whereas increase of Cldn7-expression may be associated with tumor invasion or progression. PMID: 26872891
15. that claudins-4 and -7 might be valuable markers for distinguishing hepatocellular carcinoma and cholangiocarcinoma and that cholangiolocellular carcinoma might arise from hepatic ductal cells PMID: 27444172
16. that claudin-4 can be helpful at least in making a reliable differential diagnosis of spiradenoma when overlapping morphologic features do not allow to further subclassification in the overwhelming variety of the adnexal tumors. PMID: 26616722
17. Results showed overexpression of CLDN4 in endometrial cancer cells. Its intracellular presence coupled with the biphasic effects of E2 on its expression in the cytoskeleton suggest that it may be involved in cell signaling to and from tight junctions. PMID: 26043767
18. claudin 1 and claudin 4 are differentially involved in atopic dermatitis pathogenesis PMID: 26319240
19. Results suggested that claudin-4, which was regulated by methylation status, plays an important role in breast cancer growth and malignancy via the control of cell proliferation, migration and apoptosis. PMID: 26058359
20. Overexpression of claudin-4 induced formation of vascular channels in breast cancer. PMID: 25871476
21. This meta-analysis shows that over-expression of claudin-4 is associated with progress of gastric cancer and poor prognosis of gastric cancer patients. PMID: 26109060
22. Data suggest that changes in DNA methylation in trophoblasts regulate (1) cell mobility/placentation, (2) expression of claudin-4 (CLDN4) and 4-fucosyltransferase (FUT4), and (3) matrix metalloproteinase (MMP2 and MMP9) activity. PMID: 25697377
23. Data show that claudin-4 and claudin-7 were observed in hepatocytes of severely damaged mouse and human livers. PMID: 24737165
24. increased claudin-3 and claudin-4 expression may play a postive role in the progression and metastasis of gastric cancer PMID: 25755790
25. Studies suggest that claudin-3 and claudin-4 might be targets for the treatment of chemotherapy-resistant ovarian cancer and other tumors overexpressing claudin-3 and -4 using Clostridium perfringens enterotoxin (CPE)-based theranostic agents. PMID: 23685873
26. Claudin-4 controls the receptor tyrosine kinase EphA2 pro-oncogenic switch through beta-catenin PMID: 25344320
27. Our results indicate that CLDN4 expression is correlated with poor prognosis, and CLDN1 expression may be an indicator of recurrence of oral squamous cell carcinoma. PMID: 25964581
28. Claudin-4 is frequently expressed in primary breast cancers but especially in their metastases and is thereby an attractive membrane bound molecular imaging and drug target. PMID: 25417118
29. Claudins 2 and 4 have reciprocal effects on epithelial barrier function, exhibit differential FRAP dynamics, and compete for residency within the tight junction. PMID: 25031428
30. Increased claudin 4 expression was related to advanced stage and decreased survival in nasopharyngeal carcinoma. PMID: 25778318
31. Claudin 1, 4, and 7 are important building blocks of paracellular adhesion molecules; their decreased expression in colorectal cancer seems to have critical effects on cell proliferation, motility, invasion, and immune response against the tumor. PMID: 25038829
32. upregulation of claudin-4 expression regulated by DeltaNp63 might be associated with complementary or repair responses of damaged keratinocytes with atopic dermatitis PMID: 25449274
33. The present study demonstrates that high expression of claudins 1, 4, 5 and down-regulation of claudin-7 are positive prognostic markers and are associated with good outcome and increased survival rates. PMID: 24815833
34. Low expression of claudin-4 is associated with recurrence in esophageal squamous cell carcinoma. PMID: 24737010
35. The degradation of claudin-3 and claudin-4 induced by acidic stress could be attenuated by specific TRPV1 blockers. PMID: 24073800
36. twist and zeb1 are involved in placental maturation, whereas claudin 4 appears to be connected with placental diseases such as diabetes, toxaemia or molar disease. PMID: 24304426
37. Claudin-4 immunohistochemistry effectively distinguishes adenocarcinoma from malignant mesothelioma with high sensitivity and specificity in the evaluation of malignant effusions. PMID: 24421209
38. Claudin-4 was very useful marker for distinguishing mesothelioma and adenocarcinoma PMID: 23775021
39. claudin-4 and PAX8 have a higher sensitivity and specificity for discriminating between pleural epithelioid mesotheliomas and renal cell carcinomas compared with other positive carcinoma markers PMID: 23503645
40. High claudin-4 expression is associated with gastric carcinoma. PMID: 23822740
41. PAX8 and claudin-4 have a higher sensitivity and specificity for assisting in discriminating between peritoneal epithelioid mesotheliomas and serous carcinomas when compared with all of the other positive carcinoma markers PMID: 23196794
42. Exceedingly high levels of CLDN4 might negatively influence fertility rates. PMID: 23668053
43. Knockdown of claudin-4 inhibited cell motility and the mimic peptide had no effect on motility in the claudin-4 knockdown cells. PMID: 23521713
44. Claudin-4 is a highly specific and sensitive immunohistochemical marker for assisting in distinguishing epithelioid mesotheliomas from metastatic carcinomas to the serosal membranes. PMID: 23596113
45. Altered claudin-4 expression in progesterone-treated endometrial adenocarcinoma cell line Ishikawa. PMID: 23095775
46. Claudin-3(CLDN3) and claudin-4 (CLDN4) affect sensitivity of the ovarian cancer cells to the cytotoxic effect of cisplatin by regulating expression of the Cu transporter CTR1. PMID: 23053666
47. Modeling the "airway reopening" process, examined consequent increases in pulmonary epithelial plasma membrane rupture, paracellular permeability, and disruption of the tight junction proteins zonula occludens-1 and claudin-4. PMID: 22898551
48. High CLDN4 expression is associated with tumor growth and metastases. PMID: 23097631
49. Progesterone could inhibit the growth of Ishikawa cells by decreasing the expression of claudin-4. PMID: 22883527
50. these results indicate that Twist1 induces the repression of claudin-4 expression during the epithelial-mesenchymal transition in esophageal carcinoma. PMID: 22668877

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HGNC: 2046

OMIM: 602909

KEGG: hsa:1364

STRING: 9606.ENSP00000342445

UniGene: Hs.647036