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A Novel Gene Expressed in Human Keratinocytes with Long-Term In Vitro Growth Potential is Required for Cell Growth  Laure Aurelian, Cynthia C. Smith,

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Presentation on theme: "A Novel Gene Expressed in Human Keratinocytes with Long-Term In Vitro Growth Potential is Required for Cell Growth  Laure Aurelian, Cynthia C. Smith,"— Presentation transcript:

1 A Novel Gene Expressed in Human Keratinocytes with Long-Term In Vitro Growth Potential is Required for Cell Growth  Laure Aurelian, Cynthia C. Smith, Richard Winchurch, Takahiro Gyotoku, Lucia Zaccaro, Francis J. Chrest, Joseph W. Burnett  Journal of Investigative Dermatology  Volume 116, Issue 2, Pages (February 2001) DOI: /j x Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

2 Figure 1 H11 nucleotide sequence and predicted amino acid sequence. Numbers on the left represent nucleotides. Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

3 Figure 2 H11 RNA is expressed in keratinocytes and skin tissues. (A) Northern blot hybridization with total cellular RNA from the indicated cell lines with [32P]-labeled H11 and actin cDNA probes. Numbers in the left margin are molecular size markers. (B) RT-PCR of total RNA from the indicated human adult tissues, peripheral blood leukocytes (PBL), or cell lines with H11 or actin primers. The H11 RT-PCR amplification product is 110 bp. Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

4 Figure 3 The H11 protein is expressed in keratinocytes and phosphorylated. (A) Extracts of 14-d-old keratinocytes (lanes 1, 2), A431 cells (lanes 3, 4), and 293 cells (lanes 5, 6) were immunoprecipitated with H11 N-terminal antibody (N; lanes 1, 3, 5) or preimmune serum (P; lanes 2, 4, 6) and immunoblotted with H11 C-terminal antibody (C; lanes 1, 3, 5) or preimmune serum (P; lanes 2, 4, 6). (B) Extracts of A431 cells labeled with [32P]-orthophosphate were immunoprecipitated with H11 antibodies N-terminal (N; lane 1) or C-terminal (C; lane 2) or with preimmune serum (P; lane 3). Numbers in the right margin are molecular size markers. Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

5 Figure 4 Effect of long-term in vitro culture on H11 expression. Keratinocyte cultures from one subject were stained with antibodies to H11 (□), β1 integrin (▪), β-catenin (), or K10 () at various times in culture and examined by confocal microscopy. The percentage of H11+ , β1bri, βcatbri, and K10+ cells was calculated as described in Materials and Methods. Results are expressed as percentage of positive cells ± SEM. Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

6 Figure 5 Flow cytometry of FA-stained 14-d-old keratinocyte cultures. (A) Keratinocytes stained with antibody to β1 integrin (dark line) or isotype-matched negative control (light line). (B) Keratinocytes stained with H11 antibody (black) or preimmune serum (white). (C) H11+ keratinocytes from panel (B) selected by gating represent 63% of the total cells. (D) Keratinocytes double stained with FITC-labeled H11 and phycoerythrin-labeled β1 integrin antibodies (β1bri/H11+ cells = 83%; β1dim/H11+ cells = 12.3%). Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

7 Figure 6 H11 is expressed in the epidermis. (A) Immunohistochemistry of skin tissue with H11 antibody reveals the presence of an area consisting of H11+ cells that stain with apparently different levels of intensity. Staining is located in basal cells and appears to be cytoplasmic. A magnification of the cells staining with high intensity is shown in the box located in the upper right corner. (B) Skin tissue from the same subject did not stain with preimmune serum. Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

8 Figure 7 aODN complementary to the H11 translation initiation site inhibits DNA synthesis. (A) A431 cells were untreated, treated for 24 h with the respective concentrations of scODN, sODN, or aODN, or aODN for 24 h followed by 24 h of aODN-free medium (aODN/–;), and assayed for [3H]-TdR incorporation. (B) HeLa () or 293 (□) cells were untreated or treated with 30 μM of aODN or scODN and assayed for [3H]-TdR incorporation (cpm × 1000) ± SEM. Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

9 Figure 8 aODN inhibits H11 expression. (A) A431 cells treated for 24 h with 30 μM of aODN (lane 1), scODN (lane 2), aODN followed (24 h) by aODN-free medium (lane 3), or untreated (lane 4) were labeled with [35S]-methionine during the last 4 h and the proteins were resolved by electrophoresis on 8.5% SDS-acrylamide gels. Numbers in the left margin represent molecular size markers. H11 and actin are identified. (B) Immunoprecipitation of extracts in (A) with H11 N-terminal antibody. Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

10 Figure 9 H11 aODN inhibits keratinocyte proliferation. Keratinocytes were cultured in medium containing 30 μM of aODN (A) or ODN-free medium (B, C) and stained with Rhodamine B at 12 d in culture. Journal of Investigative Dermatology  , DOI: ( /j x) Copyright © 2001 The Society for Investigative Dermatology, Inc Terms and Conditions

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