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Effect of chronic lithium on mechanical sensitivity and trabecular bone loss induced by type-1 diabetes mellitus in mice

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Abstract

Type-1 diabetes mellitus (T1DM) is a chronic condition characterized by long-term hyperglycemia that results in several complications such as painful peripheral neuropathy, bone deterioration, and increased risk of bone fractures. Lithium, a first-line therapy for bipolar disorder, has become an attractive agent for attenuating peripheral neuropathy and menopause-induced bone loss. Therefore, our aim was to determine the effect of chronic lithium treatment on mechanical hypersensitivity and trabecular bone loss induced by T1DM in mice. T1DM was induced in male C57BL/6J mice by intraperitoneal injection of streptozotocin (STZ, 50 mg/kg/day, for 5 consecutive days). 12 weeks after T1DM-induction, mice received a daily intraperitoneal injection of vehicle, 30 or 60 mg/kg lithium (as LiCl) for 6 weeks. Throughout the treatment period, blood glucose levels and mechanical sensitivity were evaluated every 2 weeks. After lithium treatment, the femur and L5 vertebra were harvested for microcomputed tomography (microCT) analysis. T1DM mice showed significant hyperglycemia, mechanical hypersensitivity, and significant trabecular bone loss as compared with the control group. Chronic lithium treatment did not revert the hindpaw mechanical hypersensitivity nor hyperglycemia associated to T1DM induced by STZ. In contrast, microCT analysis revealed that lithium reverted, in a dose-dependent manner, the loss of trabecular bone associated to T1DM induced by STZ at both the distal femur and L5 vertebra. Lithium treatment by itself did not affect any trabecular bone parameter in non-diabetic mice.

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Funding

This work was supported by the Consejo Nacional de Ciencia y Tecnología (CONACYT) project CB 2017–2018/A1-S-27869 (EMI) and project No. 316211 (RIAG).

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JMJA conceived the project. MAGA, HFTR, REMM, and VMVM performed the experiments. JMJA, RIAG and EMI analyzed and interpreted the data. JMJA, MAGA, HFTR, REMM, RIAG, GCC and EMI wrote and edited the manuscript.

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Correspondence to Juan Miguel Jiménez-Andrade.

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The authors declare that they have no conflict of interest.

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Protocol was obtained by the Institutional Animal Care and Use Committee of the Facultad de Medicina, Universidad Autónoma del Estado de Morelos (FM/20/110).

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Graniel-Amador, M.A., Torres-Rodríguez, H.F., Martínez-Mendoza, R.E. et al. Effect of chronic lithium on mechanical sensitivity and trabecular bone loss induced by type-1 diabetes mellitus in mice. Biometals 35, 1033–1042 (2022). https://doi.org/10.1007/s10534-022-00421-5

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  • DOI: https://doi.org/10.1007/s10534-022-00421-5

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