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Selected Parameters of Bone Turnover in Neuroendocrine Tumors-A Potential Clinical Use?

BackgroundCurrently, there are no effective markers to diagnose and monitor patients with neuroendocrine tumors (NETs). The aim of this study was to assess bone metabolism based on selected markers of bone turnover: OST, OPG, and IGFBP-3, in both the group of patients with NETs and the control group. Associations with selected sociodemographic, biochemical, and clinicopathological characteristics were examined. We also evaluated any potential associations between these markers and selected biochemical markers of NETs commonly used in clinical practice.MethodsThe study group included 60 patient

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… Paracrine and endocrine actions of bone—The functions of secretory proteins from osteoblasts, osteocytes, and osteoclasts Bone Res. 2018 6 16 10.1038/s41413-018-0019-6 29844945 PMC5967329 14. Moon J.-S. Jin M.H. Koh H.-M. …

A Deep Dive Into the Newest Avenues of Immunotherapy for Pediatric Osteosarcoma: A Systematic Review.

Osteosarcoma (OS) is the most common primary bone cancer affecting children and young adults, most often occurring at the metaphysis of long bones. At present, treatment with combinations of surgery and chemotherapy for the localized OS has only brought minuscule improvements in prognosis. In comparison, the advanced, metastatic, or recurrent forms of OS are often non-responsive to chemotherapy, adding to the dire need to develop new and efficient therapies. The question of interest investigated in this systematic review is whether immunotherapy can play a meaningful role in improving the clin

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… When undifferentiated stem cells enter the TME, their differentiation into osteoblasts causes further proliferation of osteocytes. …

Hypophosphatemia in cancer patients.

Dysregulation of phosphorus homeostasis resulting in hypophosphatemia is common in cancer patients and can result in serious complications and impact outcomes. Several factors, including critical illness, nutritional status, cancer type and therapy, influence the development of hypophosphatemia. Hypophosphatemia can develop as a result of phosphaturic mesenchymal tumors or as a paraneoplastic phenomenon. The clinical presentation for hypophosphatemia varies depending on the duration and severity of the hypophosphatemia and affects several organ systems. Among other serious effects, hypophospha

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… FGF-23 is a 251 amino acid protein produced in osteocytes and osteoblasts in the bone. It was identified as the long-sought-after phosphaturic factor in tumor-induced osteomalacia and autosomal dominant hypophosphatemic rickets [ 18 , 42 , 43 ]. …

Bone-Seeking Matrix Metalloproteinase Inhibitors for the Treatment of Skeletal Malignancy.

Matrix metalloproteinases (MMPs) are a family of enzymes involved at different stages of cancer progression and metastasis. We previously identified a novel class of bisphosphonic inhibitors, selective for MMPs crucial for bone remodeling, such as MMP-2. Due to the increasing relevance of specific MMPs at various stages of tumor malignancy, we focused on improving potency towards certain isoforms. Here, we tackled MMP-9 because of its confirmed role in tumor invasion, metastasis, angiogenesis, and immuno-response, making it an ideal target for cancer therapy. Using a computational analysis, we

Pleiotropic Effects of Modified Citrus Pectin.

Modified citrus pectin (MCP) has a low-molecular-weight degree of esterification to allow absorption from the small intestinal epithelium into the circulation. MCP produces pleiotropic effects, including but not limited to its antagonism of galectin-3, which have shown benefit in preclinical and clinical models. Regarding cancer, MCP modulates several rate-limiting steps of the metastatic cascade. MCP can also affect cancer cell resistance to chemotherapy. Regarding fibrotic diseases, MCP modulates many of the steps involved in the pathogenesis of aortic stenosis. MCP also reduces fibrosis to

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… Examples include acting as a cell marker and pro-survival factor in chondrocytes [ 112 ], a Runx2 target gene in osteoblasts [ 113 ], a cell marker in osteocytes [ 112 ], a biomarker for the pro-osteogenic capacity of mesenchymal stem cells [ 114 ], and a mediator of cell matrix adhesion in osteoclasts …

Differential Zoledronate Adsorption by Commercially Available Biphasic Calcium Phosphate Bone Substitutes.

Background/Objectives: Osteonecrosis of the jaw, a non-healing wound, is a side effect in patients treated with nitrogen-containing bisphosphonates (e.g., zoledronate) after some oral procedures. Considering zoledronate toxicity in surgical wounds and the capacity of calcium phosphate synthetic compounds to adsorb it, the aim of this work was to demonstrate and elucidate the mechanism underlying this adsorption. Methods: Four different calcium phosphate synthetic bone substitutes were used in this study: AdBone® BCP (0.5-1 mm), Guidor® easy-graft (0.5-1 mm), Maxresorb® (0.5-1 mm) and Maxresorb

Роль и функции " Ирисина " : перспективы последних изменений и неевродегенеративных заболеваний.

Irisin — пептид, полученный из фибронектина типа III, содержащего домен белка 5 (FNDC5) и производимый главным образом мышечными волокнами в соответствии с регулированием пероксисомных прорациатрированных рецепторов гамма-коативатора 1-альфа (PGC1α) во время упражнения. Ирисин стал объектом обширных исследований в силу его потенциала как метаболического регулятора и его антиоксидантных свойств. В частности, она связана с защитными действиями в мозгу. Несмотря на растущий интерес, остается много вопросов относительно молекулярных механизмов, лежащих в основе их воздействия. В настоящем обзоре р

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… For instance, in osteocytes and adipocytes, irisin binding to αV/β5 integrin activates the focal adhesion kinase (FAK) pathway, which in turn influences cytoskeletal dynamics and cell survival [ 169 ]. …

The osteogenic niche-targeted arsenic nanoparticles prevent colonization of disseminated breast tumor cells in the bone.

Up to 70% of patients with late-stage breast cancer have bone metastasis. Current treatment regimens for breast cancer bone metastasis are palliative with no therapeutic cure. Disseminated tumor cells (DTCs) colonize inside the osteogenic niches in the early stage of bone metastasis. Drug delivery into osteogenic niches to inhibit DTC colonization can prevent bone metastasis from entering its late stage and therefore cure bone metastasis. Here, we constructed a 50% DSS6 peptide conjugated nanoparticle to target the osteogenic niche. The osteogenic niche was always located at the endosteum with

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… Osteoblastic lineage cells comprise cells of different differentiation stages from MSCs to osteoprogenitors, osteoblasts, and ultimately cortical lining cells or osteocytes 33 . …

Stem Cells as Potential Candidates for Psoriasis Cell-Replacement Therapy.

Recent years have seen considerable progress in explaining the mechanisms of the pathogenesis of psoriasis, with a significant role played in it by the hyper-reactivity of Th1 and Th17 cells, Treg function disorder, as well as complex relationships between immune cells, keratinocytes, and vascular endothelium. The effect of stem cells in the epidermis and stem cells on T cells has been identified and the dysfunction of various types of stem cells may be a prime cause of dysregulation of the inflammatory response in psoriasis. However, exploring these mechanisms in detail could provide a chance

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… BMSCs can differentiate into multiple mesenchymal lines, including osteocytes, chondrocytes, adipose cells, endothelial cells, and cells of skeletal muscles. …

Diagnosis and treatment of bone disease in multiple myeloma: spotlight on spinal involvement.

Bone disease is observed in almost 80% of newly diagnosed symptomatic multiple myeloma patients, and spine is the bone site that is more frequently affected by myeloma-induced osteoporosis, osteolyses, or compression fractures. In almost 20% of the cases, spinal cord compression may occur; diagnosis and treatment must be carried out rapidly in order to avoid a permanent sensitive or motor defect. Although whole body skeletal X-ray is considered mandatory for multiple myeloma staging, magnetic resonance imaging is presently considered the most appropriate diagnostic technique for the evaluation

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… Osteoblasts are mesenchymal derived cells that produce bone matrix and finally differentiate to osteocytes [ 6 ]. …

Gut microbiota and microbial metabolites for osteoporosis.

Osteoporosis is an age-related bone metabolic disease. As an essential endocrine organ, the skeletal system is intricately connected with extraosseous organs. The crosstalk between bones and other organs supports this view. In recent years, the link between the gut microecology and bone metabolism has become an important research topic, both in preclinical studies and in clinical trials. Many studies have shown that skeletal changes are accompanied by changes in the composition and structure of the gut microbiota (GM). At the same time, natural or artificial interventions targeting the GM can

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… direct role in bone metabolism. 231 , 232 In addition to 1,25(OH) 2 D 3 and its analogues, VDR, a bile acid-activating receptor, can be activated by the secondary bile acid LCA 233 and promote osteoblast differentiation. 234 However, LCA accumulation has devastating effects on osteosarcoma cells 176 and osteocytes …

Granulocyte Colony Stimulating Factor-Mobilized Peripheral Blood Mononuclear Cells: An Alternative Cellular Source for Chimeric Antigen Receptor Therapy.

Lymphocyte collection by apheresis for CAR-T production usually does not include blood mobilized using granulocyte colony stimulating factor (G-CSF) due to the widespread knowledge that it causes a decrease in the number and functionality of lymphocytes. However, it is used for stem cell transplant, which is a common treatment for hematological malignancies. The growing demand for CAR therapies (CAR-T and NK-CAR), both in research and clinics, makes it necessary to evaluate whether mobilized PBSC products may be potential candidates for use in such therapies. This review collects recent works

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… Matrix-Embedded Osteocytes Regulate Mobilization of Hematopoietic Stem/Progenitor Cells. Cell Stem Cell. 2013;12:737–747. doi: 10.1016/j.stem.2013.05.001. 68. Chow A., Lucas D., Hidalgo A., Méndez-Ferrer S., Hashimoto D., Scheiermann C., Battista M., Leboeuf M., Prophete C., Van Rooijen N., et al. …

Bone loss induced by cancer treatments in breast and prostate cancer patients.

Cancer and cancer therapies are a major factor risk for osteoporosis due to bone loss and deterioration of bone microarchitecture. Both factors contribute to a decrease in bone strength and, consequently, increased bone fragility and risk of fracture. Cancer-associated bone loss is a multifactorial process, and optimal interdisciplinary management of skeletal health, accurate assessment of bone density, and early diagnosis are essential when making decisions aimed at reducing bone loss and fracture risk in patients who have received or are receiving treatment for cancer. In this document, a mu

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… Estrogens promote the proliferation and activity of OBs, decrease the apoptosis of osteocytes (involved in bone formation), and reduce the differentiation and maturation of osteoclastic precursors by increasing the production of osteoprotegerin (OPG) and decreasing the synthesis of osteoclast differentiation …

Oral complications and management strategies for patients undergoing cancer therapy.

With cancer survival rate climbing up over the past three decades, quality of life for cancer patients has become an issue of major concern. Oral health plays an important part in one's overall quality of life. However, oral health status can be severely hampered by side effects of cancer therapies including surgery, chemotherapy, radiotherapy, and hematopoietic stem cell transplantation. Moreover, prevention and treatment of these complications are often overlooked in clinical practice. The present paper aims at drawing health care professionals' attention to oral complications associated wit

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… Overtime, the irradiated area will show endothelial cell death, hyalinization, thrombosis, and obliteration of vessels; consequently, the periosteum and marrow spaces will become fibrotic while the osteoblasts and osteocytes will necrose [ 75 ]. …

Clinical approaches to osteoporosis in patients with chronic kidney disease: A comprehensive review.

Chronic kidney disease (CKD) induces secondary osteoporosis, characterized by an imbalance between bone formation and resorption due to kidney dysfunction; the result is a reduction in both bone mineral density and quality. This condition is compounded by disruption of bone metabolic turnover, abnormalities in bone microstructure and collagen cross-linking, and compromised bone quality, all of which contribute to increased bone fragility. Reduced kidney function is complicated by secondary hyperparathyroidism, which exacerbates bone fragility. Managing osteoporosis in patients with CKD is chal

Catgut embedding in acupoints combined with repetitive transcranial magnetic stimulation for the treatment of postmenopausal osteoporosis: study protocol for a randomized clinical trial.

BACKGROUND: To date, the clinical modulation for bone metabolism based on the neuro-bone mass regulation theory is still not popular. The stimulation of nerve systems to explore novel treatments for Postmenopausal osteoporosis (PMOP) is urgent and significant. Preliminary research results suggested that changes brain function and structure may play a crucial role in bone metabolism with PMOP. Thus, we set up a clinical trial to investigate the effect of the combination of repetitive transcranial magnetic stimulation (rTMS) and catgut embedding in acupoints (CEA) for PMOP and to elucidate the c

От фей к гигантам: Развенчание влияния размера тела, филогении и экологии на костную микроструктуру ксенарнских млекопитающих.

Трабковая кость — губчатая костная ткань, которая служит в качестве опоры, как решётка, внутри многих элементов скелета. Предыдущие исследования выявили аллометрические вариации в некоторых аспектах трабекулярной архитектуры костей (ТБА) и костной микроструктуры, в то время как другие - изометрически. Однако в большинстве из этих исследований были изучены весьма широкие размеры и диапазоны филогенетики или они были сосредоточены исключительно на приматах или лабораторных мышах. Мы изучили воздействие размера тела на ТБА по меньшему диапазону в млекопитающем клеще Ксенартра (плохи, бронежилиры

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… Trabeculae have a minimum thickness of about 50 µm and a maximum of 460 µm, resulting from the mechanical limitations of osteoclasts and osteocytes, respectively ( Lozupone and Favia 1990 ; Mullender and Huiskes 1995 ; Barak et al. 2013 ; Ryan and Shaw 2013 ), and trabecular thickness (Tb.Th) scales …

Neurophysiological mechanisms of cancer-induced bone pain.

BackgroundCancer-induced Bone Pain (CIBP) is an important factor affecting their quality of life of cancer survivors. In addition, current clinical practice and scientific research suggest that neuropathic pain is a representative component of CIBP. However, given the variability of cancer conditions and the complexity of neuropathic pain, related mechanisms have been continuously supplemented but have not been perfected.Aim of reviewTherefore, the current review highlights the latest progress in basic research on the field and proposes potential therapeutic targets, representative drugs and u

Diagnosis and Treatment of Bone Metastases in Breast Cancer: Radiotherapy, Local Approach and Systemic Therapy in a Guide for Clinicians.

The standard care for metastatic breast cancer (MBC) is systemic therapies with imbrication of focal treatment for symptoms. Recently, thanks to implementation of radiological and metabolic exams and development of new target therapies, oligometastatic and oligoprogressive settings are even more common-paving the way to a paradigm change of focal treatments role. In fact, according to immunophenotype, radiotherapy can be considered with radical intent in these settings of patients. The aim of this literature review is to analyze available clinical data on prognosis of bone metastases from brea

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… Etiopathology of bone metastasis is based on multicellular unit (osteoblasts, osteoclasts, bone lining cells, osteocytes) disruption with release of growing factors (TGF-B, FGF, PDGF, IGF) that promotes increase of tumor cell growth and compromise of secondary bone architecture [ 5 , 10 ]. …

New Directions in the Study and Treatment of Metastatic Cancer.

Traditional cancer therapy has relied on a strictly cytotoxic approach that views non-metastatic and metastatic tumor cells as identical in terms of molecular biology and sensitivity to therapeutic intervention. Mounting evidence suggests that, in fact, non-metastatic and metastatic tumor cells differ in key characteristics that could explain the capacity of the metastatic cells to not only escape the primary organ but also to survive while in the circulation and to colonize a distant organ. Here, we lay out a framework for a new multi-pronged therapeutic approach. This approach involves modif

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… Bone provides a unique environment that is characterized by dynamic interplay between multiple cell types including mesenchymal cells (osteocytes, osteoblasts, and adipocytes), hematopoietic cells (immune cells and osteoclasts), endothelial cells, and pericytes ( 105 ). …