Biomaterial implants induce the inflammation marker CRP at the site of implantation

Following implantation of biomaterial patches into the gastrointestinal tract, we analyzed the host's response towards the foreign material. Asymmetric patches of polydioxanone covered Vicryl or poly-3-hydroxybutyrate were sutured onto the rat stomach. Tissue samples were generated at distinct time intervals after surgery, and RNA profiles were compared by Differential Display. RT-PCR analysis of gene candidates that seemed differentially expressed showed that vitamin D binding protein mRNA was induced in stomach tissue after implantation of the biomaterial patches. In parallel, the amount of C-reactive protein mRNA was found to be increased transiently as well. Implants induce a tissue response that is specific for a given material.     

Public health and peace

The modern concept of public health, the New Public Health, carries a great potential for healthy and therefore less aggressive societies. Its core disciplines are health promotion, environmental health, and health care management based on advanced epidemiological methodologies. The main principles of living together in healthy societies can be summarized as four ethical concepts of the New Public Health essential to violence reduction equity, participation, subsidiarity, and sustainability. The following issues are discussed as violence determinants: the process of urbanization; type of neighborhood and accommodation, and consequent stigmatization; level of education; employment status; socialization of the family; women's status; alcohol and drug consumption; availability of the firearms; religious, ethnic, and racial prejudices; and poverty. Development of the health systems has to contribute to peace, since aggression, violence, and warfare are among the greatest risks for health and the economic welfare. This contribution can be described as follows: 1) full and indiscriminate access to all necessary services, 2) monitoring of their quality, 3) providing special support to vulnerable groups, and 4) constant scientific and public accountability of the evaluation of the epidemiological outcome. Violence can also destroy solidarity and social cohesion of groups, such as family, team, neighborhood, or any other social organization. Durkheim coined the term anomie for a state in which social disruption of the community results in health risks for individuals. Health professionals can make a threefold contribution to peace by 1) analyzing the causal interrelationships of violence phenomena, 2) curbing the determinants of violence according to the professional standards, and 3) training professionals for this increasingly important task. Because tolerance is an essential part of an amended definition of health, monitoring of the early signs of public intolerance is important. The vital interplay between the informed public and efficient administration, however, can only exist in an open society. The link between democracy and health of the people, and between public health and economic welfare is real. The Public Health Collaboration in South Eastern Europe (PH-SEE) evolved just in time to reconnect and strengthen disrupted professional networks in the region as a prerequisite of effective public health action.     

Quantitative comparison of three different types of anterior cruciate ligament reconstruction methods: laxity and 3-D kinematic measurements

In this project, we compared knee laxity and 3-D knee kinematics after ACL reconstruction on cadaver knees using (1) bone-patellar tendon-bone two-tunnel; (2) synthetic ligament two-tunnel; and (3) synthetic ligament "over-the-top" technique. We used a computer assisted system, based on the acquisition of the knee's movement with magnetic sensors (Polhemus, Vermont, USA). The use of personalised three-dimensional (3D) models of the bones enabled us to ensure a reproducible measurement of three-dimensional kinematic and laxity parameters. Our results showed that even when knee laxity was restored to normal, 3D kinematic measurements revealed that the reconstructions tended to under or over-constrain the knee's movement. This study shows that 3D kinematics is a complementary measurement that can be useful to get a better comprehension of the knee's function after ligament reconstruction.     

Inhibition of interleukin-1 but not tumor necrosis factor suppresses neovascularization in rat models of corneal angiogenesis and adjuvant arthritis

OBJECTIVE: To assess the capacities of the cytokine inhibitors interleukin-1 receptor antagonist (IL-1Ra; anakinra) and PEGylated soluble tumor necrosis factor receptor I (PEG sTNFRI; pegsunercept) to suppress neovascularization. METHODS: A corneal angiogenesis assay was performed by implanting nylon discs impregnated with an angiogenic stimulator (basic fibroblast growth factor or vascular endothelial growth factor) into one cornea of female Sprague-Dawley rats. Animals were treated with IL-1Ra or PEG sTNFRI for 7 days, after which new vessels were quantified. In a parallel study, male Lewis rats with mycobacteria-induced adjuvant-induced arthritis were treated with IL-1Ra or PEG sTNFRI for 7 days beginning at disease onset, after which scores for inflammation and bone erosion as well as capillary counts were acquired from sections of arthritic hind paws. RESULTS: Treatment with IL-1Ra yielded a dose-dependent reduction in growth factor-induced corneal angiogenesis, while PEG sTNFRI did not. IL-1Ra, but not PEG sTNFRI, significantly reduced the number of capillaries in arthritic paws, even though both anticytokines reduced inflammation and bone erosion to a similar degree. CONCLUSION: These data support a major role for IL-1, but not TNFalpha, in angiogenesis and suggest that an additional antiarthritic mechanism afforded by IL-1 inhibitors, but not anti-TNF agents, is the suppression of the angiogenic component of pannus.