Parathyroid hormone (1-34) (human)

Animal experiment:

Rats[1]Teriparatide is administered daily to 4-week-old male rats for 1, 2, or 4 weeks with different concentrations (10, 40 μg/kg). At each time point, longitudinal growth, expressed as maximal femur length, is not statistically different between treated and control rats or between the two different treatment groups. Midfemur diaphyseal widths also do not differ between groups[1]. Rabbits[2]Forty-two female New Zealand white rabbits (17-21 weeks old) are used throughout the study. After 10 days of adaptation to their new environment, the rabbits (18-22 weeks old) are randomized into six groups of 7 animals each using the stratified weight method, as follows: 4-week vehicle administration group (4W-Veh), 4-week Teriparatide (TPTD) administration group (4W-Teriparatide: 20 μg/kg, subcutaneously [s.c.], daily), 12-week vehicle administration group (12W-Veh), 4-week Teriparatide administration + 8-week vehicle administration group (4W-Teriparatide + 8W-Veh), 4-week Teriparatide administration + 8-week lower-dose IBN administration group (4W-Teriparatide + 8W-IBN(L): 20 μg/kg of IBN, s.c., every 4 weeks), and 4-week Teriparatide administration + 8-week higher-dose IBN administration group (4W-Teriparatide + 8W-IBN(H): 100 μg/kg of IBN, s.c., every 4 weeks)[2].

References:

[1]. Frolik CA, et al. Comparison of recombinant human PTH(1-34) (LY333334) with a C-terminally substituted analog of human PTH-related protein(1-34) (RS-66271): In vitro activity and in vivo pharmacological effects in rats. J Bone Miner Res. 1999 Feb;14(2):163-72.
[2]. Iwamoto J, et al. Influence of Teriparatide and Ibandronate on Cortical Bone in New Zealand White Rabbits: A HR-QCT Study. Calcif Tissue Int. 2016 Nov;99(5):535-542.