Parathyroid hormone related peptidelung cancer Parathyroid hormone-related peptide, often abbreviated as PTHrP, is a fascinating and complex peptide hormone that plays a significant role in various physiological processes. While structurally similar to parathyroid hormone (PTH), a key regulator of calcium and phosphate in the blood, PTHrP exhibits a broader range of functions, extending beyond mineral metabolism to encompass crucial roles in development, cellular signaling, and even disease states.
Initially discovered in the early 1990s due to its ability to mimic the effects of PTH in malignancy-associated hypercalcemia, PTHrP was identified as a tumor-derived systemic factor.Overview: Parathyroid Hormone-Related Peptide, Plasma This discovery marked a pivotal moment in understanding humoral hypercalcemia of malignancy (HHM), a condition characterized by elevated calcium levels in the blood caused by substances produced by tumorsAid in the evaluation of unexplained hypercalcemia, particularly in suspected hypercalcemia of malignancy.. In such cases, PTHrP is often elevated, making the parathyroid hormone-related protein blood test a valuable tool for aiding in the evaluation of individuals with hypercalcemia of unknown origin and for the diagnosis of humoral hypercalcemia of malignancy (HHM) in patients with hypercalcemia and non-elevated PTH. The parathyroid hormone-related protein (PTHrP) blood test measures the level of a hormone in the blood, called parathyroid hormone-related protein, and is particularly useful when malignancy is suspected but cannot be detected by other means.PTH and PTHrP: Similar Structures but Different Functions | Physiology In these scenarios, PTHrP is often raised in hypercalcemia of malignancy, whereas PTH is infrequently elevated作者:P Kopp·2022—The parathyroid hormone-related peptide (PTHrP)is a hormone that is evolutionarily related to parathyroid hormone(PTH) and encoded by a .... Therefore, PTHrP is of most use in hypercalcemic patients in whom the PTH is suppressed and malignancy is suspected.
Beyond its association with malignancy, PTHrP is integral to normal biological functions. It is secreted by mesenchymal stem cells and plays a vital role in regulating fetal calcium during development, ensuring adequate calcium transfer from mother to fetus across the placenta. This function is so critical that PTH rP is a fetal peptide closely related to PTH which maintains the fetus hypercalcemic to the mother.2017年11月9日—PTHrP has more paracrine and autocrine functions in virtually all tissuesthan classical endocrine functions and is essential in embryonic, fetal and post- ... Furthermore, PTHrP is involved in processes such as lactation, dental eruption, and has been shown to interact with other signaling molecules like Bone Morphogenetic Protein 2 to influence bone remodeling by increasing osteoblastogenesis and decreasing adipogenesis in pluripotent cells.
The parathyroid hormone-related peptide (PTHrP) molecule itself is composed of approximately 139-173 amino acids, with its N-terminus exhibiting similarities to parathyroid hormone作者:RC Gensure·2005·被引用次数:373—PTH has a central role in the regulation of serum calcium and phosphate, whileparathyroid hormone-related peptide(PTHrP) has important developmental roles.. This structural homology explains why PTHrP can bind to the parathyroid hormone/parathyroid hormone-related peptide (PTH-1R) receptor, a key signaling factor. However, despite these structural similarities, PTH and PTHrP have distinct functions. While PTH has a central role in the regulation of serum calcium and phosphate, PTHrP has important developmental roles and exerts more paracrine and autocrine functions in virtually all tissues than classical endocrine functions.Parathyroid hormone related protein (PTHrp)
Research into PTHrP continues to uncover its diverse roles.May be of value in the differential diagnosis of hypercalcaemia.PTHrP is often raised in hypercalcaemia of malignancy, whereas PTH is infrequently elevated in ... Studies have indicated that PTHrP contains a classical bipartite nuclear localization signal, suggesting that nuclear targeting of PTHrP is associated with its cellular functions.Parathyroid Hormone-Related Peptide Furthermore, the parathyroid hormone-related peptides family includes PTH, PTH-like hormones (PTHrP and PTHLH), and tuberoinfundibular peptide of 39 (TIP39), with TIP39 also being related to parathyroid hormonePTHrP is of most use in hypercalcaemic patientsin whom the PTH is suppressed and malignancy is suspected..
In summary, parathyroid hormone-related peptide is a vital hormone with implications in both health and disease.Parathyroid Hormone-Related Peptide - Medscape Reference Its involvement in fetal development, calcium homeostasis, and its role as a marker in certain cancers underscore its significance. Understanding the intricate functions of PTHrP is crucial for advancing medical diagnostics and therapeutics, particularly in the context of hypercalcemia of unknown origin and suspected humoral hypercalcemia of malignancy.
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