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Krüger TB, Syversen U, Herlofson BB, Lian AM, Reseland JE. Targeting a therapeutically relevant concentration of alendronate for in vitro studies on osteoblasts. Acta Odontol Scand 2022; 80:619-625. [PMID: 35605138 DOI: 10.1080/00016357.2022.2072522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
OBJECTIVE Bisphosphonates like alendronate mainly exert their effects on osteoclasts. However, osteoblasts are also affected, but exposed to a much lower concentration in vivo than the osteoclasts. Given that the effects are dose-dependent, the intention of the study was to identify a therapeutically relevant concentration of alendronate for in vitro studies on osteoblasts. MATERIALS AND METHODS Primary human osteoblasts were incubated with alendronate (5, 20 and 100 µM) for 1, 3, 7 and 14 days. Proliferation and viability were assessed, and the effects on cellular growth and function were evaluated by multianalyte profiling of selected proteins in cell culture media using the Luminex 200TM. RESULTS The viability was not affected by any of the dosages. Exposure to 5 µM alendronate had a neutral effect on osteoblast proliferation, and on secretion of osteogenic and inflammatory markers, while enhancing synthesis of a marker of angiogenesis. 20 µM alendronate induced a decline in proliferation and affected angiogenic and osteogenic biomarkers adversely. 100 µM alendronate reduced proliferation dramatically, and this dosage was excluded from further experiments. CONCLUSION A concentration of 5 µM alendronate exerted effects on human osteoblasts that may translate to those observed in vivo and could therefore be relevant for in vitro studies.
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Affiliation(s)
- Tormod B. Krüger
- Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Unni Syversen
- Department of Biomaterials, Faculty of Dentistry, University of Oslo, Oslo, Norway
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, NTNU—Norwegian University of Science and Technology, Trondheim, Norway
- Department of Endocrinology, Clinic of medicine, St. Olavs University Hospital, Trondheim, Norway
| | - Bente B. Herlofson
- Department of Oral Surgery and Oral Medicine, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Aina M. Lian
- Oral Research Laboratory, Faculty of Dentistry, University of Oslo, Oslo, Norway
| | - Janne E. Reseland
- Department of Biomaterials, Faculty of Dentistry, University of Oslo, Oslo, Norway
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Otsuka H, Endo Y, Ohtsu H, Inoue S, Noguchi S, Nakamura M, Soeta S. Histidine decarboxylase deficiency inhibits NBP-induced extramedullary hematopoiesis by modifying bone marrow and spleen microenvironments. Int J Hematol 2021; 113:348-361. [PMID: 33398631 DOI: 10.1007/s12185-020-03051-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 11/18/2020] [Accepted: 11/20/2020] [Indexed: 01/03/2023]
Abstract
Histidine decarboxylase (HDC), a histamine synthase, is expressed in various hematopoietic cells and is induced by hematopoietic cytokines such as granulocyte colony-stimulating factor (G-CSF). We previously showed that nitrogen-containing bisphosphonate (NBP)-treatment induces extramedullary hematopoiesis via G-CSF stimulation. However, the function of HDC in NBP-induced medullary and extramedullary hematopoiesis remains unclear. Here, we investigated changes in hematopoiesis in wild-type and HDC-deficient (HDC-KO) mice. NBP treatment did not induce anemia in wild-type or HDC-KO mice, but did produce a gradual increase in serum G-CSF levels in wild-type mice. NBP treatment also enhanced Hdc mRNA expression and erythropoiesis in the spleen and reduced erythropoiesis in bone marrow and the number of vascular adhesion molecule 1 (VCAM-1)-positive macrophages in wild-type mice, as well as increased the levels of hematopoietic progenitor cells and proliferating cells in the spleen and enhanced expression of bone morphogenetic protein 4 (Bmp4), CXC chemokine ligand 12 (Cxcl12), and hypoxia inducible factor 1 (Hif1) in the spleen. However, such changes were not observed in HDC-KO mice. These results suggest that histamine may affect hematopoietic microenvironments of the bone marrow and spleen by changing hematopoiesis-related factors in NBP-induced extramedullary hematopoiesis.
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Affiliation(s)
- Hirotada Otsuka
- Laboratory of Veterinary Anatomy, Nippon Veterinary and Life Science University, 1-7-1 Kyonancho,Musashino-shi, Tokyo, 180-8602, Japan
| | - Yasuo Endo
- Division of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University, 4-1 Seiryomachi, Aoba-ku, Sendai-shi, Miyagi, 980-8575, Japan
| | - Hiroshi Ohtsu
- Tekiju Rehabilitation Hospital, 2-11-32 Hanayamacho, Nagata-ku, Kobe-shi, Hyogo, 653-0876, Japan.,Tohoku University, 4-1 Seiryomachi, Aoba-ku, Sendai-shi, Miyagi, 980-8575, Japan
| | - Satoshi Inoue
- Department of Oral Anatomy and Developmental Biology, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Syunya Noguchi
- Department of Molecular Medicine and Anatomy, Graduate School of Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8602, Japan
| | - Masanori Nakamura
- Department of Oral Anatomy and Developmental Biology, School of Dentistry, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Satoshi Soeta
- Laboratory of Veterinary Anatomy, Nippon Veterinary and Life Science University, 1-7-1 Kyonancho,Musashino-shi, Tokyo, 180-8602, Japan.
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