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11981 details
Primary information
ID11981
Therapeutic IDTh1275
Protein NameAbaloparatide
Sequence>Th1275_Abaloparatide AVSEHQLLHDKGKSIQDLRRRELLEKLLXKLHTA
Molecular Weight3961
Chemical FormulaC174H300N56O49
Isoelectric PointNA
HydrophobicityNA
Melting pointNA
Half-lifeThe mean (SD) half-life if 1.7 (0.7) hrs.
DescriptionAbaloparatide is an analog of PTHrP (parathyroid hormone-related protein). It was approved in April 28, 2017 by the FDA (as Tymlos) for the treatment of postmenopausal women with osteoporosis at high risk for fracture. Abaloparatide is a synthetic peptide that is related to hPTHrP and has demonstrated in preclinical testing the potential to widen the anabolic window for bone therapeutics, stimulating bone formation with a limited effect on bone resorption and mineral mobilization. This could enable improved convenience over currently available anabolic therapies, resulting in greater compliance and, ultimately, greater benefit to patients.
Indication/DiseaseInvestigated for use/treatment in postmenopausal osteoporosis to reduce vertebral and/or non-vertebral fractures.
PharmacodynamicsAbaloparatide (BA058), a proprietary analog of human parathyroid hormone-related protein (hPTHrP), is currently undergoing clinical trials by the company for the treatment of osteoporosis in postmenopausal women. PTHrP is a critical peptide for promoting new bone formation, with a distinct role from parathyroid hormone, or PTH, which primarily regulates calcium homeostasis and bone resorption. Clinical studies show increased bone mineral density (BMD) and levels of bone formation markers in a dose-response relationship.
Mechanism of ActionIn target cells, abaloparatide acts as an agonist on PTH type 1 receptor (PTH1R) and activates both G protein–mediated cAMP signaling and ß-arrestin-mediated ERK-1/2 signaling pathways with similar potency. Abaloparatide binds to RG conformation of PTH1R with greater selectivity that results in more transient cell signalling responses.
ToxicityAbaloparatide has shown to induce higher incidences of osteosarcoma in a dose-dependent manner in a 2 year carcinogenicity study with female and male rats. This correlation is not known to be reflected in humans, however patients with increased risk of osteosarcoma including Paget's disease, open epiphyses, and skeletal malignancies should avoid this treatment. Abaloparatide may also cause hypercalcemia so should be avoided in patients with pre-existing conditions of primary hyperthyroidism or hypercalcemia. Overdose is commonly associated with hypercalcemia, nausea, vomiting, dizziness, tachycardia, orthostatic hypotension and headache. There is no known antidote for abaloparatide.
MetabolismAbaloparatide is metabolized into smaller peptide fragments via non-specific proteolytic degradation.
AbsorptionThe time it takes to reach peak concentration following subcutaneous administration of 80 mcg abaloparatide ranges from 0.25 to 0.52 hr, with the median time of 0.51hr. The bioavailability in healthy women is 36% following administration.
Vd is approximately 50L.
ClearanceNA
CategoriesAmino Acids, Peptides, and Proteins
Patents Number10996208
Date of Issue04-05-2021
Date of Expiry30-04-2038
Drug InteractionNA
TargetParathyroid hormone/parathyroid hormone-related peptide receptor
Brand NameTymlos
CompanyRadius Health, Inc.
Brand DescriptionRadius Health, Inc.
Prescribed ForSubcutaneous
Chemical Name2000 ug/1mL
FormulationTYMLOS is contraindicated in patients with a history of systemic hypersensitivity to abaloparatide or to any component of the product formulation. Reactions have included anaphylaxis, dyspnea and urticaria [see ADVERSE REACTIONS].
Physical Appearance high calcium levels in the urine (hypercalciuria), dizziness, nausea, headache, palpitations, fatigue, upper abdominal pain and spinning sensation (vertigo).
Route of AdministrationTymlos is a man-made form of parathyroid hormone that exists naturally in the body. Abaloparatide increases bone mineral density and bone strength, which may prevent fractures. Tymlos is a prescription medicine used to treat osteoporosis in postmenopausal women who have a high risk of bone fracture....
Recommended DosageTYMLOS is indicated for the treatment of postmenopausal women with osteoporosis at high risk for fracture defined as a history of osteoporotic fracture, multiple risk factors for fracture, or patients who have failed or are intolerant to other available osteoporosis therapy. In postmenopausal women with osteoporosis, TYMLOS reduces the risk of vertebral fractures and nonvertebral fractures [see Clinical Studies].
Contraindication4-[[2-[[2-[[2-[[2-[[2-[[5-amino-2-[[2-[[2-[[6-amino-2-[[2-[[6-amino-2-[[2-[[2-[[2-[[2-[[5-amino-2-[[2-[[2-[[2-[[2-(2-aminopropanoylamino)-3-methylbutanoyl]amino]-3-hydroxypropanoyl]amino]-4-carboxybutanoyl]amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-5-oxopentanoyl]amino]-4-methylpentanoyl]amino]-4-methylpentanoyl]amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-3-carboxypropanoyl]amino]hexanoyl]amino]acetyl]amino]hexanoyl]amino]-3-hydroxypropanoyl]amino]-3-methylpentanoyl]amino]-5-oxopentanoyl]amino]-3-carboxypropanoyl]amino]-4-methylpentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-5-carbamimidamidopentanoyl]amino]-5-[[1-[[1-[[1-[[6-amino-1-[[1-[[1-[[1-[[6-amino-1-[[1-[[1-[[1-[(1-amino-1-oxopropan-2-yl)amino]-3-hydroxy-1-oxobutan-2-yl]amino]-3-(1H-imidazol-5-yl)-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-1-oxohexan-2-yl]amino]-2-methyl-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-1-oxohexan-2-yl]amino]-4-carboxy-1-oxobutan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-5-oxopentanoic acid
Side EffectsTYMLOS injection for subcutaneous administration contains abaloparatide, a synthetic 34 amino acid peptide. Abaloparatide is an analog of human parathyroid hormone related peptide, PTHrP(1-34). It has 41% homology to hPTH(1-34) (human parathyroid hormone 1-34) and 76% homology to hPTHrP(1-34) (human parathyroid hormone-related peptide 1-34).
Useful Link 1Link
Useful Link 2Link
RemarksNA