Naoko Kanda, Shinichi Watanabe  Journal of Investigative Dermatology 

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Histamine Enhances the Production of Nerve Growth Factor in Human Keratinocytes  Naoko Kanda, Shinichi Watanabe  Journal of Investigative Dermatology  Volume 121, Issue 3, Pages 570-577 (September 2003) DOI: 10.1046/j.1523-1747.2003.12428.x Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Dose dependence for the effects of histamine on NGF secretion and the inhibition by H1 or H2 receptor antagonists or pertussis toxin on the effects of histamine. Keratinocytes were preincubated with pertussis toxin (PTX; 16 h, 100 ng per ml), pyrilamine (PR), or cimetidine (CM) (each 10–5 M, 30 min), and then incubated with indicated doses of histamine for 24 h in the presence of the inhibitors. The culture supernatants were assayed for NGF. Values are mean±SD of triplicate cultures. *p<0.05 versus control cultures, by one-way ANOVA with Dunnett's multiple comparison test. The data shown in the figure are representative of five separate experiments. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 2 The effects of histamine on NGF mRNA level in keratinocytes. Keratinocytes were preincubated with pertussis toxin (PTX; 16 h, 100 ng per ml), pyrilamine (PR), or cimetidine (CM) (each 10–5 M, 30 min), and then incubated with 10–6 M histamine (HA). After 3 h, mRNA was isolated and RT-PCR was performed. The intensity of the band for NGF was corrected to that for GAPDH. The lower graph shows the corrected intensities relative to that in control cells cultured with medium alone (set as 1.0). The results shown in the figure are representative of five separate experiments. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 3 The effects of histamine on the activities of wild-type or mutated NGF promoters. (a) Schematic representation of human NGF promoter. The locations of cis-elements are shown with their sequences, and substituted bases for mutation are indicated in italics. The nucleotide positions are relative to the transcriptional start site. (b) Keratinocytes were transiently transfected with wild-type (WT) or mutated pNGF luc together with pRSV-β-gal. The cells were preincubated with or without 10–5 M pyrilamine (PR) for 30 min, and then treated with 10–6 M histamine (HA). After 6 h, relative luciferase activities were analyzed. The data are mean±SEM of four separate experiments. Values at the right indicate the fold induction versus basal promoter activity. *p<0.05 versus control values, †p<0.05 versus values with histamine alone, by one-way ANOVA with Scheffe's multiple comparison test. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 4 The effects of histamine on TRE-dependent transcription. Keratinocytes were transiently transfected with p4×TRE1-TATA-luc or p4×TRE2-TATA-luc or enhancerless pTATA-luc, together with pRSV-β-gal. The cells were preincubated with 10–5 M pyrilamine (PR) for 30 min, and then incubated with 10–6 M histamine (HA). After 6 h, relative luciferase activities were analyzed. The results represent mean±SEM of four separate experiments. Values at the right indicate the fold induction versus basal activity. *p<0.05 versus control values, †p<0.05 versus values with histamine alone, by one-way ANOVA with Scheffe's multiple comparison test. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 5 The effect of histamine on transcription factor binding to TRE. Keratinocytes were preincubated with 10–5 M pyrilamine (PR) for 30 min, and then incubated with 10–6 M histamine (HA) for 60 min. Nuclear extracts were prepared and incubated with TRE1-containing probe. In supershift assays, nuclear extracts were incubated with antibodies against c-Fos or c-Jun for 30 min before the addition of the probe. The asterisks indicate the supershifted complexes. The results shown in the figure are representative of four separate experiments. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 6 The effects of histamine on c-Fos or c-Jun mRNA expression in keratinocytes. Keratinocytes were incubated with 10–6 M histamine. At indicated time-points, mRNA was isolated and RT-PCR was performed. The results shown in the figure are representative of five separate experiments. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 7 The inhibition by several signal inhibitors of histamine-induced NGF promoter activity (a), NGF secretion (b), TRE-dependent transcriptional activity (c), and c-Fos mRNA expression (d). (a), (c) Keratinocytes were transiently transfected with pNGF luc (a) or p4×TRE1-TATA-luc (c), together with pRSV-β-gal, then preincubated with 10–6 M H-89, 10–6 M calphostin C (CalC), or 10–5 M PD98059 for 30 min, and then incubated with 10–6 M histamine (HA). After 6 h, relative luciferase activities were analyzed. (b), (d) Keratinocytes were preincubated with inhibitors, and then incubated with histamine as above. Culture supernatants were harvested after 24 h whereas mRNA was extracted after 30 min. In (a), (b), (c), values are mean±SEM of five separate experiments. *p<0.05 versus control values, †p<0.05 versus values with histamine alone, by one-way ANOVA with Scheffe's multiple comparison test. The results shown in (d) are representative of five separate experiments. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 8 The histamine-induced effects on PKC. (a) Keratinocytes were incubated with medium alone or with 10–6 M histamine (HA) for 10 min. PKC activity was measured in cytosolic and membrane fractions. The data are mean±SEM of five separate experiments. *p<0.05 versus control values (Con), by paired t test. (b) Keratinocytes were preincubated with pyrilamine (PR; 10–5 M, 30 min), cimetidine (CM; 10–5 M, 30 min), U73122 (10–6 M, 30 min), or pertussis toxin (PTX; 100 ng per ml, 16 h), and then incubated with 10–6 M histamine (HA) for 10 min. PKC activity in the membrane fraction was analyzed. The data are mean±SEM of five separate experiments. *p<0.05 versus control values with medium alone, †p<0.05 versus values with histamine alone, by one-way ANOVA with Scheffe's multiple comparison test. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 9 The effects of histamine on ERK1/2 (a), JNK (b), or p38 MAPK (c) phosphorylation. Keratinocytes were preincubated with 10–5 M pyrilamine (PR), 10–6 M calphostin C (CalC), 10–5 M PD98059, or 10–6 M AG1478 for 30 min, and then incubated with 10–6 M histamine (HA) for 10 min. Crude protein extracts (50 μg) were subjected to SDS-PAGE followed by western blot analysis. The membranes were blotted with antiphospho-ERK antibody (upper panel), and then stripped and reprobed with anti-ERK antibody (lower panel). (b), (c) Keratinocytes were incubated with 10–6 M histamine for 10 min, and cellular protein extracts were probed with antiphospho-JNK (b) or antiphospho-p38 antibody (c) (upper panels), and then reprobed with anti-JNK or anti-p38 antibodies (lower panels), respectively. As a positive control, keratinocytes were incubated with 10 ng per ml tumor necrosis factor α (TNF-α) for 10 min, and were analyzed as above. The results shown in the figure are representative of five separate experiments. Journal of Investigative Dermatology 2003 121, 570-577DOI: (10.1046/j.1523-1747.2003.12428.x) Copyright © 2003 The Society for Investigative Dermatology, Inc Terms and Conditions