JavaScript is disabled in your browser. Please enable JavaScript to view this website.
AB32118

Anti-Cytokeratin 18 抗体 [E431-1]

Anti-Cytokeratin 18 antibody [E431-1]

3

(6 Reviews)

|

(39 Publications)

Rabbit Recombinant Monoclonal Cytokeratin 18 antibody. Suitable for WB, ICC/IF, Flow Cyt (Intra), IHC-P and reacts with Human samples. Cited in 39 publications.

別名を表示する

CYK18, PIG46, KRT18, Cell proliferation-inducing gene 46 protein, Cytokeratin-18, Keratin-18, CK-18, K18

16 Images
Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • Flow Cyt (Intra)

Lab

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

Flow cytometry overlay histogram showing left MCF7 positive cells and right negative A375 stained with ab32118 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilised with 0.1% PBS-Triton X-100 for 15 min. The cells were then incubated in 1x PBS containing 10% normal goat serum to block non-specific protein-protein interaction followed by the antibody (ab32118) (1x 106 in 100μl at 0.008μg/ml (1/258750)) for 30min at 22°C.

The secondary antibody Goat Anti-Rabbit IgG H&L (Alexa Fluor® 488) preadsorbed was incubated at 1/4000 for 30min at 22°C

Isotype control antibody (black line) was Recombinant Rabbit IgG, monoclonal [EPR25A] - Isotype Control used at the same concentration and conditions as the primary antibody. Unlabelled sample (blue line) was also used as a control.

Acquisition of >5000 events were collected using a 50 mW Blue laser (488nm) and 525/40 bandpass filter.

This antibody gave a positive signal in MCF7 Fixed with 4% formaldehyde (10 min) / permeabilised with 0.1% PBS-Triton X-100 for 15 min under the same conditions.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

ab32118 showing positive staining in Normal kidney tissue.

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • ICC/IF

PubMed

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

Indirect immunofluorescence staining with antibodies against DNA, cytokeratin-7 and cytokeratin-18 (upper panel) or against DNA, vimentin and cytokeratin-18 (lower panel). Representatives are presented. Scale bar : 20 μm.

Control or treated cells were fixed for 15 min with 4% PFA containing 0.1% Triton X-100 at room temperature. The following primary antibodies were used for staining : monoclonal mouse antibodies against vimentin and cytokeratin-7 (both 1 : 100, DAKO) and monoclonal rabbit antibody against cytokeratin-18 (1 : 50, Abcam). DNA was stained using DAPI (4',6-diamidino-2-phenylindole-dihydrochlorid) (Roche). Slides were examined using an Axio Imager 7.1 microscope (Zeiss) and images were taken using an Axio Cam MRm camera (Zeiss). The immunofluorescence stained slides were also examined by a confocal laser scanning microscope (CLSM) (Leica CTR 6500, Heidelberg). Images were processed using Photoshop.

Muschol-Steinmetz C. et al PLoS One. 2013 Sep 19;8(9):e73337. doi: 10.1371/journal.pone.0073337. eCollection 2013. Reproduced under the Creative Commons license http://creativecommons.org/licenses/by/4.0/

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of Human stomach tissue sections labeling Cytokeratin 18 with purified ab32118 at 1/500 dilution (0.08 µg/ml). Perform heat mediated antigen retrieval using ab93684 (Tris/EDTA buffer, pH 9.0). ImmunoHistoProbe one step HRP Polymer (ready to use) was used as the secondary antibody. Negative control : PBS instead of the primary antibody. Hematoxylin was used as a counterstain.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

ab32118 showing positive staining in Normal colon tissue.

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • Flow Cyt (Intra)

Unknown

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

Overlay histogram showing MCF7 cells stained with ab32118 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab32118, 1/100 dilution) for 30 min at 22°C. The secondary antibody used was DyLight® 488 goat anti-rabbit IgG (H+L) (ab96899) at 1/500 dilution for 30 min at 22°C. Isotype control antibody (black line) was rabbit IgG (monoclonal) (1μg/1x106 cells) used under the same conditions. Acquisition of >5,000 events was performed. This antibody gave a positive signal in MCF7 cells fixed with 4% paraformaldehyde (10 min)/permeabilized with 0.1% PBS-Tween for 20 min used under the same conditions.

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • ICC/IF

Unknown

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

Immunocytochemistry/Immunofluorescence analysis of HT-29 cells labelling Cytokeratin 18 with purified ab32118 at 1/500. Cells were fixed with 100% Methanol. An Alexa Fluor® 488-conjugated goat anti-rabbit IgG (ab150077) at 1/1000 dilution was used as the secondary antibody. The cells were co-stained with ab7291, a mouse anti-tubulin antibody (1/1000) using ab150120, an Alexa Fluor® 594-conjugated goat anti-mouse IgG (1/1000) as the secondary antibody. Nuclei were counterstained with DAPI (blue).

For negative control 1, rabbit primary antibody was used followed by anti-mouse secondary antibody (ab150120).
For negative control 2, mouse primary antibody (ab7291) and anti-rabbit secondary antibody (ab150077) were used.

Alexa Fluor® 488 (ab194124) conjugated version is available for this clone.

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • ICC/IF

Supplier Data

Immunocytochemistry/ Immunofluorescence - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

Immunocytochemistry/Immunofluorescence analysis of HeLa (+ve) and U87-MG (-ve) cells labelling Cytokeratin 18 with ab32118 at 2 ug/ml overnight at +4°C. Cells were fixed with 100% Methanol (5 min), permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. A preadsorbed Alexa Fluor® 488-conjugated goat anti-rabbit IgG (ab150081) at 1/1000 dilution was used as the secondary antibody. The cells were co-stained with ab7291, a mouse anti-tubulin antibody (1/1000), using ab150119, a preadsorbed Alexa Fluor® 647-conjugated goat anti-mouse IgG (1/1000) as the secondary antibody. Nuclei were counterstained with DAPI (blue).

Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).

This product also gave a positive signal under the same testing conditions in HeLa cells fixed with 4% formaldehyde (10 min).

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

ab32118 showing positive staining in Breast carcinoma tissue.

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • Flow Cyt (Intra)

Unknown

Flow Cytometry (Intracellular) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

Intracellular Flow Cytometry analysis of MCF7 (Human breast adenocarcinoma epithelial cell) cells labeling Cytokeratin 18 with purified ab32118 at 1/20 dilution (2μg/ml) (red). Cells were fixed with 80% Methanol and permeabilised with 0.1% Tween-20. A Goat anti rabbit IgG (Alexa Fluorr® 488, ab150077) secondary antibody was used at 1/2000. Isotype control - Rabbit monoclonal IgG (Black). Unlabeled control - Cell without incubation with primary antibody and secondary antibody (Blue).

R-PE (ab210410) conjugated version is available for this clone.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

Fluorescent immunohistochemical analysis of paraffin-embedded human normal kidney tissue using ab32118. Green-CK18 red-PI

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

ab32118 showing positive staining in Gastric adenocarcinoma tissue.

Western blot - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • WB

Lab

Western blot - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

All lanes:

Western blot - Anti-Cytokeratin 18 antibody [E431-1] (ab32118) at 1/2000 dilution

Lane 1:

A431 (Human epidermoid carcinoma epithelial cell) whole cell lysates at 15 µg

Lane 2:

HeLa (Human cervix adenocarcinoma epithelial cell) whole cell lysates at 15 µg

Secondary

All lanes:

Western blot - Goat Anti-Rabbit IgG H&L (HRP) (<a href='/products/secondary-antibodies/goat-rabbit-igg-h-l-hrp-ab97051'>ab97051</a>) at 1/20000 dilution

Predicted band size: 48 kDa

Observed band size: 48 kDa

false

Western blot - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • WB

Unknown

Western blot - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

All lanes:

Western blot - Anti-Cytokeratin 18 antibody [E431-1] (ab32118) at 1/10000 dilution

All lanes:

A431 cell lysate

Predicted band size: 48 kDa

Observed band size: 48 kDa

false

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

ab32118 showing negative staining in Glioma tissue.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)
  • IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cytokeratin 18 antibody [E431-1] (AB32118)

ab32118 showing negative staining in Normal brain tissue.

関連する標識済み抗体及び組成の異なる製品 (4)

  • 578 PE

    PE Anti-Cytokeratin 18 antibody [E431-1]

  • 665 Alexa Fluor® 647

    Alexa Fluor® 647 Anti-Cytokeratin 18 antibody [E431-1]

  • 519 Alexa Fluor® 488

    Alexa Fluor® 488 Anti-Cytokeratin 18 antibody [E431-1]

  • Carrier free

    Anti-Cytokeratin 18 antibody [E431-1] - BSA and Azide free

Key facts

宿主種

Rabbit

クローン性

Monoclonal

クローン番号

E431-1

アイソタイプ

IgG

キャリアフリー

No

交差種

Human

アプリケーション

Flow Cyt (Intra), WB, ICC/IF, IHC-P

applications

免疫原

The exact immunogen used to generate this antibody is proprietary information.

特異性

Human Cytokeratin 18 (K18) was used as immunogen after isolation from cells pre-treated with okadaic acid or pervanadate to promote Tyr hyperphosphorylation.

Reactivity data

{ "title": "Reactivity Data", "filters": { "stats": ["", "Species", "Dilution Info", "Notes"], "tabs": { "all-applications": {"fullname" : "All Applications", "shortname": "All Applications"}, "WB" : {"fullname" : "Western blot", "shortname":"WB"}, "ICCIF" : {"fullname" : "Immunocytochemistry/ Immunofluorescence", "shortname":"ICC/IF"}, "FlowCytIntra" : {"fullname" : "Flow Cytometry (Intracellular)", "shortname":"Flow Cyt (Intra)"}, "IHCP" : {"fullname" : "Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)", "shortname":"IHC-P"} }, "product-promise": { "all": "all", "testedAndGuaranteed": "tested", "guaranteed": "expected", "predicted": "predicted", "notRecommended": "not-recommended" } }, "values": { "Human": { "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "1/2000", "WB-species-notes": "<p>For unpurified use at 1/10000</p>", "ICCIF-species-checked": "testedAndGuaranteed", "ICCIF-species-dilution-info": "1/100 - 1/500", "ICCIF-species-notes": "<p></p>", "FlowCytIntra-species-checked": "testedAndGuaranteed", "FlowCytIntra-species-dilution-info": "1/20", "FlowCytIntra-species-notes": "<p><a href='/products/primary-antibodies/rabbit-igg-monoclonal-epr25a-isotype-control-ab172730'>ab172730</a> - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.</p>", "IHCP-species-checked": "testedAndGuaranteed", "IHCP-species-dilution-info": "1/500", "IHCP-species-notes": "<p></p> Perform heat-mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol." } } }

製品の詳細

Patented technology
Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.

What are the advantages of a recombinant monoclonal antibody?
This product is a recombinant monoclonal antibody, which offers several advantages including:

  • - High batch-to-batch consistency and reproducibility
  • - Improved sensitivity and specificity
  • - Long-term security of supply
  • - Animal-free batch production

For more information, read more on recombinant antibodies.

出荷温度及び保存条件

製品の状態
Liquid
精製方法
Affinity purification Protein A
バッファー組成
pH: 7.2 - 7.4 Preservative: 0.01% Sodium azide Constituents: PBS, 40% Glycerol (glycerin, glycerine), 0.05% BSA
出荷温度
Blue Ice
短期保存期間
1-2 weeks
短期保存温度
+4°C
長期保存温度
-20°C
分注に関する情報
Upon delivery aliquot
保管に関する情報
Avoid freeze / thaw cycle

補足情報

This supplementary information is collated from multiple sources and compiled automatically.

Cytokeratin 18 (CK18) also known as Keratin 18 or KRT18 is a type I intermediate filament protein with a molecular weight of approximately 45 kDa. It plays a mechanical role in stabilizing epithelial cell structure and function. CK18 is expressed in single-layered epithelial tissues such as the liver intestine and pancreas. It partners with the type II keratin usually KRT8 to form a stable cytoskeletal network in these cells providing structural integrity and resilience.
Biological function summary

CK18 maintains cellular integrity and mediates resistance to mechanical and non-mechanical stresses in epithelial cells. It forms heterodimers with KRT8 participating in a complex network of filaments important for maintaining cell shape and stability. This organization plays a role in managing cell survival during stress and apoptosis helping regulate cellular functions and responses in tissues where it is expressed.

Pathways

Cytokeratin 18 is involved in the apoptosis and cellular stress response pathways. It interacts with proteins such as caspases during apoptosis facilitating cytoskeletal reorganization and cell fragmentation. CK18 in coordination with KRT8 also participates in signaling pathways that regulate cell cycle and apoptotic processes underlining its importance in cellular turnover and tissue homeostasis.

Elevated levels of CK18 fragments are often observed in cases of non-alcoholic steatohepatitis (NASH) and breast cancer. It serves as a biomarker for liver injury due to its abundance in hepatocytes and release upon cell death. In breast cancer alterations in CK18 expression can reflect disease progression where it interacts with other proteins such as vimentin indicating epithelial-to-mesenchymal transition a process that facilitates metastasis.

製品プロトコール

For this product, it's our understanding that no specific protocols are required. You can visit:

ターゲットの情報

Required for the formation of KRT8/KRT18 filaments that are involved in ARHGEF40-mediated actin stress fiber formation and tensional force-induced stress fiber formation and reinforcement (PubMed : 26823019). Also acts downstream of ROCK kinase activation as part of a positive feedback mechanism in response to cellular mechanical stress loading (PubMed : 26823019). Organization and orientation of KRT18 filaments are responsible for the properly elongated morphology of epithelial tubules (By similarity). Involved in the uptake of thrombin-antithrombin complexes by hepatic cells (By similarity). When phosphorylated, plays a role in filament reorganization. Involved in the delivery of mutated CFTR to the plasma membrane. Together with KRT8, is involved in interleukin-6 (IL-6)-mediated barrier protection.
See full target information KRT18

文献 (39)

Recent publications for all applications. Explore the full list and refine your search

NPJ precision oncology 9:94 PubMed40169839

2025

Zebrafish Avatar testing preclinical study predicts chemotherapy response in breast cancer.

Applications

Unspecified application

Species

Unspecified reactive species

Raquel V Mendes,Joana M Ribeiro,Helena Gouveia,Cátia Rebelo de Almeida,Mireia Castillo-Martin,Maria José Brito,Rita Canas-Marques,Eva Batista,Celeste Alves,Berta Sousa,Pedro Gouveia,Miguel Godinho Ferreira,Maria João Cardoso,Fatima Cardoso,Rita Fior

BMC biology 23:16 PubMed39838458

2025

Co-isolation of human donor eye cells and development of oncogene-mutated melanocytes to study uveal melanoma.

Applications

Unspecified application

Species

Unspecified reactive species

Yunxi Chen,Eva Jin,Mohamed Abdouh,Éric Bonneil,Daniel Alexander Jimenez Cruz,Thupten Tsering,Qianqian Zhou,Aurélie Fuentes-Rodriguez,Alexandra Bartolomucci,Alicia Goyeneche,Solange Landreville,Miguel N Burnier,Julia V Burnier

Cancer research 84:3235-3249 PubMed39024552

2024

CCN6 Suppresses Metaplastic Breast Carcinoma by Antagonizing Wnt/β-Catenin Signaling to Inhibit EZH2-Driven EMT.

Applications

Unspecified application

Species

Unspecified reactive species

Maria E Gonzalez,Bryce Brophy,Ahmad Eido,Adele E Leonetti,Sabra I Djomehri,Giuseppina Augimeri,Nicholas J Carruthers,Raymond G Cavalcante,Francesca Giordano,Sebastiano Andò,Alexey I Nesvizhskii,Eric R Fearon,Celina G Kleer

Advanced functional materials 32: PubMed37920452

2022

Molecularly Tailored Interface for Long-Term Xenogeneic Cell Transplantation.

Applications

Unspecified application

Species

Unspecified reactive species

Sajeesh Kumar Madhurakkat Perikamana,Nailah Seale,Jiaul Hoque,Ji Hyun Ryu,Vardhman Kumar,Yuru Vernon Shih,Shyni Varghese

Journal of cell communication and signaling 16:433-445 PubMed34811632

2021

The matricellular protein CCN6 differentially regulates mitochondrial metabolism in normal epithelium and in metaplastic breast carcinomas.

Applications

Unspecified application

Species

Unspecified reactive species

Mai Tran,Shoshana A Leflein,Maria E Gonzalez,Celina G Kleer

Neoplasma 68:1157-1168 PubMed34533029

2021

microRNA-10a-5p overexpression suppresses malignancy of colon cancer by regulating human liver cancer fibroblasts.

Applications

Unspecified application

Species

Unspecified reactive species

Xuan Zheng,Jing-Wu Li,Yan-Kun Liu,Yi-Fu Ma,Jian-Hui Gan,Su-Gui Han,Jian Wang,Zhao-Yuan Wan,Jun Zhang,Yan Liu,Yu-Feng Li,Guang-Ling Zhang

Cells 10: PubMed34571867

2021

Functional Analysis of p21 and Its Family Members in Trophoblastic Cells of the Placenta and Its Roles in Preeclampsia.

Applications

Unspecified application

Species

Unspecified reactive species

Nina-Naomi Kreis,Alexandra Friemel,Lukas Jennewein,Samira Catharina Hoock,Anna Elisabeth Hentrich,Thorsten Nowak,Frank Louwen,Juping Yuan

Molecular medicine reports 23: PubMed33236127

2020

Exosomal‑miR‑10a derived from colorectal cancer cells suppresses migration of human lung fibroblasts, and expression of IL‑6, IL‑8 and IL‑1β.

Applications

Unspecified application

Species

Unspecified reactive species

Jian Wang,Yuanting Liu,Ying Li,Xuan Zheng,Jianhui Gan,Zhaoyuan Wan,Jun Zhang,Yan Liu,Yaqi Wang,Wanning Hu,Yufeng Li,Yankun Liu

Cancers 12: PubMed33050649

2020

Uveal Melanoma-Derived Extracellular Vesicles Display Transforming Potential and Carry Protein Cargo Involved in Metastatic Niche Preparation.

Applications

Unspecified application

Species

Unspecified reactive species

Thupten Tsering,Alexander Laskaris,Mohamed Abdouh,Prisca Bustamante,Sabrina Parent,Eva Jin,Sarah Tadhg Ferrier,Goffredo Arena,Julia V Burnier

Cell reports 27:3916-3926.e5 PubMed31242423

2019

Mesenchymal Stem/Stromal Cell Engulfment Reveals Metastatic Advantage in Breast Cancer.

Applications

Unspecified application

Species

Unspecified reactive species

Yu-Chih Chen,Maria E Gonzalez,Boris Burman,Xintao Zhao,Talha Anwar,Mai Tran,Natasha Medhora,Ayse B Hiziroglu,Woncheol Lee,Yu-Heng Cheng,Yehyun Choi,Euisik Yoon,Celina G Kleer
View all publications

Abcam product promise

当社は、高品質な試薬を通じてお客様の研究を力強くサポートすることをお約束いたします。ご使用いただく各段階で、常にお客様をサポートできる体制を整えております。万が一、製品が期待通りに機能しない場合は、「Abcam Product Promise」による当社保証制度に基づき、安心してご利用いただけます。
保証に関する詳細については利用規約をご確認ください。

Please note: All products are 'FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC OR THERAPEUTIC PROCEDURES'.

For licensing inquiries, please contact partnerships@abcam.com