Bone Abstracts

Background: Cannabinoid receptors are expressed in synovial joints but their role in joint disease is unknown. Here we examined the role of the type 2 cannabinoid receptor (CB2) in the pathogenesis of age-related osteoarthritis and osteoarthritis caused by destabilisation of the medial meniscus (DMM) in WT and CB2-deficient mice (Cnr2−/− mice).Methods: The severity of arthritis was graded histologically according to standard techni...

Breast cancer (BrCa) patients with metastases restricted to bone (BO) show a longer overall survival compared to BrCa patients developing bone and visceral metastases (BV). To unveil the molecular mechanisms that segregate these two BrCa patient groups, we performed microarray analyses on bone metastasis samples from BO and BV patients, finding in the latter a set of up-regulated genes involved in oxygen metabolism. We focused on Hemoglobin B (HBB) and evaluated its expression...

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Background: The activity of rheumatoid arthritis (RA) is the one of the significant reasons of the increase of bone resorption and decrease of bone mineral density (BMD). The control of activity of inflammatory process with biologics (including rituximab – anti-CD20 antibodies) can be considered as possibility of decrease in bone resorption and BMD stabilization.Objectives: To access the dynamics of BMD after 24 months of treatment with rituximab in...

The aim of the study was to evaluate relationships between morphometric, densitometric and mechanical properties of tarsometatarsus in ostriches (Struthio camelus). Males (n=9) and females (n=15) were kept to slaughter age of 14 months of life to obtain left tarsometatarsus. Using computed tomography technique (Somatom Emotion, Siemens), volumetric bone mineral density (vBMD) of the trabecular (Td) and cortical bone (Cd) were measured. Areal BMD and ...

One growth factor that potentially plays a role in fracture healing is midkine (Mdk). Mdk is expressed in chondrocytes during bone repair (Ohta et al. 1999) and has been shown to influence bone mass and mechanotransduction (Neunaber et al. 2010, Liedert et al. 2011). The aim of the present study was to evaluate the effects of Mdk-deficiency on bone repair in a standardized mouse femur osteotomy model.Mdk-deficient and wildtype ...

The aim of this study was to determine interrelationships between final body weight, bone-specific alkaline phosphatase (BAP), IGF1 and morphological, densitometric and mechanical properties of deciduous mandibular teeth isolated from seven healthy Polish Merino rams. Four incisors (I1–I4) and second premolar (P2) were obtained from 5-month-old sheep. Teeth were cleaned, weighed, and their length was measured. Mean volumetric tooth mineral...

The aim of the study was to evaluate time-related changes in serum concentration of bone tissue metabolism markers in Polish Large White male pigs. At birth, the piglets were divided into four groups. The first control group (n=7) received physiological saline i.m. (placebo). The second group (NanoCa group; n=7) were administered p.o. with nanopartical calcium (Ace Nano Calcium, NanoTechWorld, Pohang, Korea). The third group (Dex group; n=7) received...

Tea is the second most consumed beverage in the world, next to water. The popularity of tea is determined by healthy properties connected with the presence of antioxidants, hence tea can be classified as functional food. Cadmium (Cd) and lead (Pb) are toxic metals commonly occurring in the human environment with exposure ~5 and 35 mg/kg Bw per week respectively.Thirty growing male Wistar rats (12 weeks old, 326.4±31.0 g) were used. Rat were fed ...

Zinc (Zn) has a number of key roles relating to cell signalling, cell activation, gene expression, protein synthesis, apoptosis and is crucial for the development of immune cells. Damage to the linings of the gastrointestinal tract is observed during Zn deficiency. Since a few years it has been suggested the existence of the novel interrelationship between bone and gut:gut–bone axis.The aim was to establish changes of morphological, geometric and me...