Calcitriol and its analogues are considered drugs supporting the anticancer treatment of breast cancer and preventing the osteoporosis that results from the development of cancer or from chemotherapy or hormone therapy. Following the orthotopic implantation of 4T1 mammary carcinoma cells into aged ovariectomized (OVX) mice, we evaluated the effects of calcitriol and its two analogues, PRI-2191 and PRI-2205, on metastatic spread and bone homeostasis. Calcitriol and its analogues temporarily inhibited the formation of metastases in the lungs. Unexpectedly, only mice treated with calcitriol analogues showed a deterioration of bone-related parameters, such as bone column density, marrow column density and the CaPO4 coefficient. These findings correlated with an increased number of active osteoclasts differentiated from bone marrow-derived macrophages in mice treated with the analogues. Interestingly, in the tumours from mice treated with PRI-2191 and PRI-2205, the expression of Tnfsf11 (RANKL) was increased. On the other hand, osteopontin (OPN) levels in plasma and tumour tissue, as well as TRAC5b levels in tumours, were diminished by calcitriol and its analogues. Despite a similar action of both analogues towards bone metabolism, their impact on vitamin D metabolism differed. In particular, PRI-2191 and calcitriol, not PRI-2205 treatment significantly diminished the levels of both 25(OH)D-3 and 24,25(OH)(2)D-3. In conclusion, though there is evident antimetastatic activity in old OVX mice, signs of increased bone metabolism and deterioration of bone mineralization during therapy with calcitriol analogues were observed.
Calcitriol Analogues Decrease Lung Metastasis but Impair Bone Metabolism in Aged Ovariectomized Mice Bearing 4T1 Mammary Gland Tumours / A. Anisiewicz, B. Filip-Psurska, A. Pawlik1, A. Nasulewicz-Goldeman, T. Piasecki, K. Kowalski, M. Maciejewska, J. Jarosz, J. Banach, D. Papiernik, A. Mazur, A. Kutner, J.A. Maier, J. Wietrzyk. - In: AGING AND DISEASE. - ISSN 2152-5250. - 10:5(2019 Oct), pp. 977-991.
|Titolo:||Calcitriol Analogues Decrease Lung Metastasis but Impair Bone Metabolism in Aged Ovariectomized Mice Bearing 4T1 Mammary Gland Tumours|
MAIER, JEANETTE ANNE MARIE (Penultimo)
|Parole Chiave:||breast cancer; elderly; ovariectomized mice; metastasis; calcitriol; vitamin D analogues|
|Settore Scientifico Disciplinare:||Settore MED/04 - Patologia Generale|
|Data di pubblicazione:||ott-2019|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.14336/AD.2018.0921|
|Appare nelle tipologie:||01 - Articolo su periodico|
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