title: Establishment of a clonal cell line producing granulocyte colony-stimulating factor and parathyroid hormone-related protein from a lung cancer patient with leukocytosis and hypercalcemia.
abstract: Squamous cell lung carcinoma cells obtained from a patient who presented with leukocytosis and hypercalcemia were transplanted into nude mice and a serially transplantable cell line, OKa-N-1, was established. The nude mice transplanted with OKa-N-1 cells displayed leukocytosis and hypercalcemia. Serum levels of granulocyte colony-stimulating factor (G-CSF) and parathyroid hormone-related protein (PTHrP) were both elevated in these mice. In vitro cultivation of this tumor cell line gave rise to a clonal cell line, OKa-C-1. Nude mice transplanted with the OKa-C-1 cell line also showed leukocytosis and hypercalcemia with high serum G-CSF and PTHrP levels. The culture supernatant of OKa-C-1 contained high levels of G-CSF and PTHrP. Immunohistochemical studies showed the expression of PTHrP in OKa-C-1 cells. Reverse transcription polymerase chain reaction revealed the presence of G-CSF and PTHrP mRNA in this cell line. Dexamethasone treatment inhibited the transcription of G-CSF and PTHrP genes. This new human squamous carcinoma cell line, OKa-C-1, would be useful for studying the mechanism of simultaneous production of G-CSF and PTHrP and their control in cancer patients with leukocytosis and hypercalcemia.
authors.affiliation: Department of Medicine, Kochi Medical School, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Asahi
authors.forename: I
authors.initials: I
authors.lastname: Kubonishi
authors.forename: J
authors.initials: J
authors.lastname: Imamura
authors.forename: M
authors.initials: M
authors.lastname: Kamioka
authors.forename: H
authors.initials: H
authors.lastname: Matsushita
authors.forename: M
authors.initials: M
authors.lastname: Furihata
authors.forename: Y
authors.initials: Y
authors.lastname: Ohtsuki
authors.forename: I
authors.initials: I
authors.lastname: Miyoshi
mesh_terms: D000818:Animals; D001483:Base Sequence; D002294:Carcinoma, Squamous Cell / Q000097:blood / Q000378:metabolism* / Q000473:pathology; D016179:Granulocyte Colony-Stimulating Factor / Q000096:biosynthesis* / Q000097:blood; D006801:Humans; D006934:Hypercalcemia / Q000209:etiology; D007964:Leukocytosis / Q000209:etiology; D008175:Lung Neoplasms / Q000097:blood / Q000378:metabolism* / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D008875:Middle Aged; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins / Q000096:biosynthesis* / Q000097:blood; D010281:Parathyroid Hormone / Q000096:biosynthesis* / Q000097:blood; D044162:Parathyroid Hormone-Related Protein; D016133:Polymerase Chain Reaction; D014176:Protein Biosynthesis; D014407:Tumor Cells, Cultured / Q000378:metabolism* / Q000473:pathology
chemical_list: D009363:Neoplasm Proteins; C470121:PTHLH protein, human; D010281:Parathyroid Hormone; D044162:Parathyroid Hormone-Related Protein; D016179:Granulocyte Colony-Stimulating Factor