Slow and steady wins the race: Fractionated near-infrared treatment empowered by graphene-enhanced 3D scaffolds for precision oncology.

Surgically addressing tumors poses a challenge, requiring a tailored, multidisciplinary approach for each patient based on the unique aspects of their case. Innovative therapeutic regimens combined to reliable reconstructive methods can contribute to an extended patient's life expectancy. This study presents a detailed comparative investigation of near-infrared therapy protocols, examining the impact of non-fractionated and fractionated irradiation regimens on cancer treatment. The therapy is based on the implantation of graphene oxide/poly(lactic-co-glycolic acid) three-dimensional printed scaffolds, exploring their versatile applications in oncology by the examination of pro-inflammatory cytokine secretion, immune response, and in vitro and in vivo tumor therapy. The investigation into cell death patterns (apoptosis vs necrosis) underlines the pivotal role of protocol selection underscores the critical influence of treatment duration on cell fate, establishing a crucial parameter in therapeutic decision-making. In vivo experiments corroborated the profound impact of protocol selection on tumor response. The fractionated regimen emerged as the standout performer, achieving a substantial reduction in tumor size over time, surpassing the efficacy of the non-fractionated approach. Additionally, the fractionated regimen exhibited efficacy also in targeting tumors in proximity but not in direct contact to the scaffolds. Our results address a critical gap in current research, highlighting the absence of a standardized protocol for optimizing the outcome of photodynamic therapy. The findings underscore the importance of personalized treatment strategies in achieving optimal therapeutic efficacy for precision cancer therapy.

Severely Damaged Freeze-Injured Skeletal Muscle Reveals Functional Impairment, Inadequate Repair, and Opportunity for Human Stem Cell Application.

BACKGROUND: The regeneration of severe traumatic muscle injuries is an unsolved medical need that is relevant for civilian and military medicine. In this work, we produced a critically sized nonhealing muscle defect in a mouse model to investigate muscle degeneration/healing phases. MATERIALS AND METHODS: We caused a freeze injury (FI) in the biceps femoris of C57BL/6N mice. From day 1 to day 25 post-injury, we conducted histological/morphometric examinations, an analysis of the expression of genes involved in inflammation/regeneration, and an in vivo functional evaluation. RESULTS: We found that FI activates cytosolic DNA sensing and inflammatory responses. Persistent macrophage infiltration, the prolonged expression of eMHC, the presence of centrally nucleated myofibers, and the presence of PAX7+ satellite cells at late time points and with chronic physical impairment indicated inadequate repair. By looking at stem-cell-based therapeutic protocols of muscle repair, we investigated the crosstalk between M1-biased macrophages and human amniotic mesenchymal stem cells (hAMSCs) in vitro. We demonstrated their reciprocal paracrine effects where hAMSCs induced a shift of M1 macrophages into an anti-inflammatory phenotype, and M1 macrophages promoted an increase in the expression of hAMSC immunomodulatory factors. CONCLUSIONS: Our findings support the rationale for the future use of our injury model to exploit the full potential of in vivo hAMSC transplantation following severe traumatic injuries.

The Innate Immune Signalling Pathways: Turning RIG-I Sensor Activation Against Cancer.

Over the last 15 years, the ability to harness a patient's own immune system has led to significant progress in cancer therapy. For instance, immunotherapeutic strategies, including checkpoint inhibitors or adoptive cell therapy using chimeric antigen receptor T-cell (CAR-T), are specifically aimed at enhancing adaptive anti-tumour immunity. Several research groups demonstrated that adaptive anti-tumour immunity is highly sustained by innate immune responses. Host innate immunity provides the first line of defence and mediates recognition of danger signals through pattern recognition receptors (PRRs), such as cytosolic sensors of pathogen-associated molecular patterns (PAMPs) and damage-associated molecular pattern (DAMP) signals. The retinoic acid-inducible gene I (RIG-I) is a cytosolic RNA helicase, which detects viral double-strand RNA and, once activated, triggers signalling pathways, converging on the production of type I interferons, proinflammatory cytokines, and programmed cell death. Approaches aimed at activating RIG-I within cancers are being explored as novel therapeutic treatments to generate an inflammatory tumour microenvironment and to facilitate cytotoxic T-cell cross-priming and infiltration. Here, we provide an overview of studies regarding the role of RIG-I signalling in the tumour microenvironment, and the most recent preclinical studies that employ RIG-I agonists. Lastly, we present a selection of clinical trials designed to prove the antitumour role of RIG I and that may result in improved therapeutic outcomes for cancer patients.

Graphene Quantum Dots' Surface Chemistry Modulates the Sensitivity of Glioblastoma Cells to Chemotherapeutics.

Recent evidence has shown that graphene quantum dots (GQDs) are capable of crossing the blood-brain barrier, the barrier that reduces cancer therapy efficacy. Here, we tested three alternative GQDs' surface chemistries on two neural lineages (glioblastoma cells and mouse cortical neurons). We showed that surface chemistry modulates GQDs' biocompatibility. When used in combination with the chemotherapeutic drug doxorubicin, GDQs exerted a synergistic effect on tumor cells, but not on neurons. This appears to be mediated by the modification of membrane permeability induced by the surface of GQDs. Our findings highlight that GQDs can be adopted as a suitable delivery and therapeutic strategy for the treatment of glioblastoma, by both directly destabilizing the cell membrane and indirectly increasing the efficacy of chemotherapeutic drugs.

Biocompatibility assessment of sub-5 nm silica-coated superparamagnetic iron oxide nanoparticles in human stem cells and in mice for potential application in nanomedicine.

Ultrasmall superparamagnetic iron oxide nanoparticles with a size <5 nm are emerging nanomaterials for their excellent biocompatibility, chemical stability, and tunable surface modifications. The applications explored include dual-modal or multi-modal imaging, drug delivery, theranostics and, more recently, magnetic resonance angiography. Good biocompatibility and biosafety are regarded as the preliminary requirements for their biomedical applications and further exploration in this field is still required. We previously synthesized and characterized ultrafine (average core size of 3 nm) silica-coated superparamagnetic iron oxide fluorescent nanoparticles, named sub-5 SIO-Fl, uniform in size, shape, chemical properties and composition. The cellular uptake and in vitro biocompatibility of the as-synthesized nanoparticles were demonstrated in a human colon cancer cellular model. Here, we investigated the biocompatibility of sub-5 SIO-Fl nanoparticles in human Amniotic Mesenchymal Stromal/Stem Cells (hAMSCs). Kinetic analysis of cellular uptake showed a quick nanoparticle internalization in the first hour, increasing over time and after long exposure (48 h), the uptake rate gradually slowed down. We demonstrated that after internalization, sub-5 SIO-Fl nanoparticles neither affect hAMSC growth, viability, morphology, cytoskeletal organization, cell cycle progression, immunophenotype, and the expression of pro-angiogenic and immunoregulatory paracrine factors nor the osteogenic and myogenic differentiation markers. Furthermore, sub-5 SIO-Fl nanoparticles were intravenously injected into mice to investigate the in vivo biodistribution and toxicity profile for a time period of 7 weeks. Our findings showed an immediate transient accumulation of nanoparticles in the kidney, followed by the liver and lungs, where iron contents increased over a 7-week period. Histopathology, hematology, serum pro-inflammatory response, body weight and mortality studies demonstrated a short- and long-term biocompatibility and biosafety profile with no apparent acute and chronic toxicity caused by these nanoparticles in mice. Overall, these results suggest the feasibility of using sub-5 SIO-Fl nanoparticles as a promising agent for stem cell magnetic targeting as well as for diagnostic and therapeutic applications in oncology.

Heterogeneity and coexistence of oncogenic mechanisms involved in HCV-associated B-cell lymphomas.

The association of HCV-infection with B-lymphomas is supported by the regression of most indolent/low-grade lymphomas following anti-viral therapy. Studies on direct and indirect oncogenic mechanisms have elucidated the pathogenesis of HCV-associated B-lymphoma subtypes. These include B-lymphocyte proliferation and sustained clonal expansion by HCV-envelope protein stimulation of B-cell receptors, and prolonged HCV-infected B-cell growth by overexpression of an anti-apoptotic BCL-2 oncogene caused by the increased frequency of t(14;18) chromosomal translocations in follicular lymphomas. HCV has been implicated in lymphomagenesis by a "hit-and-run" mechanism, inducing enhanced mutation rate in immunoglobulins and anti-oncogenes favoring immune escape, due to permanent genetic damage by double-strand DNA-breaks. More direct oncogenic mechanisms have been identified in cytokines and chemokines in relation to NS3 and Core expression, particularly in diffuse large B-cell lymphoma. By reviewing genetic alterations and disrupted signaling pathways, we intend to highlight how mutually non-contrasting mechanisms cooperate with environmental factors toward progression of HCV-lymphoma.

Combination of cord blood-derived human hepatic progenitors and hepatogenic factors strongly improves recovery after acute liver injury in mice through modulation of the Wnt/ß-catenin signaling.

Cell therapy represents a promising alternative strategy for end-stage liver disease, and hepatic progenitors are the best candidates. The possibility to maximize the paracrine effects of transplanted cells represents a great potential benefit for cell therapy success. We studied how cell type and microenvironment modulate the Wnt/ß-catenin signaling in vitro and in vivo. In vitro, the onset of hepatocyte commitment was characterized by the presence of nuclear truncated ß-catenin. In vivo, we analyzed the effect of human hepatic progenitors on damage recovery and functional regeneration in a mouse model of acute liver injury, either in combination or in absence of a selected mix of hepatogenic factors. Animals injected with human hepatic progenitors and hepatogenic factors showed improved engraftment triggering the Wnt/ß-catenin signaling cascade. Human hepatic progenitors expressing the human oval cell marker OV6 displayed a consistent colocalization with ß-catenin and colocalized with Wnt1 main ligand of the canonical pathway. Wnt5a, on the contrary, was expressed in distinct liver cell populations. Epithelial mesenchymal transition-related markers showed enhanced expression and wider distribution, and the hepato-mesenchymal population Thy1 + CK19- was also present. Control animals injected with hepatogenic factors alone exhibited higher ß-catenin, decreased Wnt5a levels, and persistent proliferation of the hepato-mesenchymal population. In conclusion, the combination of human hepatic progenitors with selected hepatogenic factors creates a positive synergy with local microenvironment, ameliorates cell engraftment, stimulates and accelerates regenerative process, and improves the rescue of hepatic function by modulating the Wnt/ßcatenin signaling and activating hepato-mesenchymal population.

Targeting Cytosolic Nucleic Acid-Sensing Pathways for Cancer Immunotherapies.

The innate immune system provides the first line of defense against pathogen infection though also influences pathways involved in cancer immunosurveillance. The innate immune system relies on a limited set of germ line-encoded sensors termed pattern recognition receptors (PRRs), signaling proteins and immune response factors. Cytosolic receptors mediate recognition of danger damage-associated molecular patterns (DAMPs) signals. Once activated, these sensors trigger multiple signaling cascades, converging on the production of type I interferons and proinflammatory cytokines. Recent studies revealed that PRRs respond to nucleic acids (NA) released by dying, damaged, cancer cells, as danger DAMPs signals, and presence of signaling proteins across cancer types suggests that these signaling mechanisms may be involved in cancer biology. DAMPs play important roles in shaping adaptive immune responses through the activation of innate immune cells and immunological response to danger DAMPs signals is crucial for the host response to cancer and tumor rejection. Furthermore, PRRs mediate the response to NA in several vaccination strategies, including DNA immunization. As route of double-strand DNA intracellular entry, DNA immunization leads to expression of key components of cytosolic NA-sensing pathways. The involvement of NA-sensing mechanisms in the antitumor response makes these pathways attractive drug targets. Natural and synthetic agonists of NA-sensing pathways can trigger cell death in malignant cells, recruit immune cells, such as DCs, CD8+ T cells, and NK cells, into the tumor microenvironment and are being explored as promising adjuvants in cancer immunotherapies. In this minireview, we discuss how cGAS-STING and RIG-I-MAVS pathways have been targeted for cancer treatment in preclinical translational researches. In addition, we present a targeted selection of recent clinical trials employing agonists of cytosolic NA-sensing pathways showing how these pathways are currently being targeted for clinical application in oncology.

Nucleic Acid Sensing Machinery: Targeting Innate Immune System for Cancer Therapy.

BACKGROUND: Nucleic acid sensing is an essential strategy employed by the innate immune system to detect both pathogen-derived nucleic acids and self-DNA released by host apoptotic or necrotic cells. The presence of nucleic acids that gain access to the cytoplasm is perceived by mammalian cells as "stranger" or "danger" signals that trigger a myriad of immunological responses. Recent publications have highlighted the importance of nucleic acid sensing machinery as mediator of innate and adaptive immunity, and cGAS, STING and RIG-I agonists have been validated as immunooncology agents in cancer therapy. OBJECTIVE: The crucial role of cGAS and STING in eliciting innate and adaptive immune responses provides a scientific rationale for using cGAMP and STING agonists both in human preventive vaccine and immunotherapy settings. Thus, search for natural and synthetic STING agonists and development of cyclic dinucleotides (CDNs)-based adjuvants were strongly intensified. Furthermore, with their ability to induce tumour cell death and lymphocyte cross priming, RIG-I ligands are among the most promising molecules for the development of new immunostimulatory adjuvants in cancer vaccines. RESULTS: This work focuses on relevant recent patents (2010-2017) that entail the use of nucleic acid sensing machinery to elicit innate and adaptive immune responses, highlighting a new approach in immune-mediated cancer therapy. Several patents describe compositions and methods that may be used as immuno-oncology agents for the treatment of cancer patients. cGAS and/or STING pathways modulating compounds alone or in combination with pharmaceutical compositions are discussed. New approaches to improve DNA-vaccine induced adaptive immunity for cancer therapy through increasing the level of plasmid-mediated activation of innate immune signalling pathways are also discussed. In addition, a targeted selection of very recent clinical studies describing the employment of innate immunity targeting compounds is reported. CONCLUSION: It is highly relevant to deepen the study of the nucleic acid-sensing mechanisms to develop new pharmacological approaches to engage these pathways within the tumour microenvironment. Indeed, further clarification will be functional to develop advanced anticancer strategies or to design new vaccine formulations.

In vitro biocompatibility study of sub-5 nm silica-coated magnetic iron oxide fluorescent nanoparticles for potential biomedical application.

Magnetic iron oxide nanoparticles (IONPs), for their intriguing properties, have attracted a great interest as they can be employed in many different biomedical applications. In this multidisciplinary study, we synthetized and characterized ultrafine 3 nm superparamagnetic water-dispersible nanoparticles. By a facile and inexpensive one-pot approach, nanoparticles were coated with a shell of silica and contemporarily functionalized with fluorescein isothiocyanate (FITC) dye. The obtained sub-5 nm silica-coated magnetic iron oxide fluorescent (sub-5 SIO-Fl) nanoparticles were assayed for cellular uptake, biocompatibility and cytotoxicity in a human colon cancer cellular model. By confocal microscopy analysis we demonstrated that nanoparticles as-synthesized are internalized and do not interfere with the CaCo-2 cell cytoskeletal organization nor with their cellular adhesion. We assessed that they do not exhibit cytotoxicity, providing evidence that they do not affect shape, proliferation, cellular viability, cell cycle distribution and progression. We further demonstrated at molecular level that these nanoparticles do not interfere with the expression of key differentiation markers and do not affect pro-inflammatory cytokines response in Caco-2 cells. Overall, these results showed the in vitro biocompatibility of the sub-5 SIO-Fl nanoparticles promising their safe employ for diagnostic and therapeutic biomedical applications.

Asthma, allergy and the Olympics: a 12-year survey in elite athletes.

OBJECTIVE: There are no comprehensive surveys relating the reported high prevalence of asthma and allergic diseases in athletes to comorbidities and immune changes associated with intense chronic exercise. This 12-year survey aims to evaluate several clinical, functional and immunological parameters in order to assess features, trend and burden of asthma, allergy, infections and autoimmune diseases, in a large homogeneous population of Olympic athletes. METHODS: Six hundred and fifty-nine Italian Olympic athletes were studied through four cross-sectional surveys performed between 2000 and 2012 before the Summer and Winter Olympics. Clinical diagnosis of allergic, autoimmune and infectious diseases was complemented by: skin-prick tests (n = 569); pulmonary function tests (n = 415); total (n = 158) and specific (n = 72) serum IgE; serum autoantibodies (n = 30), cytokines and growth factors (n = 92); flow cytometry (n = 135). RESULTS: The prevalence of asthma and/or exercise-induced bronchoconstriction was 14.7%, with a significant increase (P = 0.04) from 2000 (11.3%) to 2008 (17.2%). The prevalence of rhinitis, conjunctivitis, skin allergic diseases and anaphylaxis was 26.2%, 20.0%, 14.8% and 1.1%, respectively. Sensitization to inhalant allergens was documented in 49.0% of athletes, being 32.7% in 2000 and 56.5% in 2008 (P < 0.0001). Food, drug and venom allergy was present in 7.1%, 5.0% and 2.1% of athletes, respectively. The high prevalence of asthma and allergy was associated with recurrent upper respiratory tract (10.3%) and herpes (18.2%) infections, an abnormal T cell subset profile and a general down-regulation of serum cytokines with a significantly lower IFN-γ/IL-4 ratio. CONCLUSION: A chronic and intense physical exercise may cause a transient immunodepression with a preferential shift to a Th2 response, associated with abnormalities of the respiratory tract.

Toxoplasma gondii in small ruminants in Northern Italy - prevalence and risk factors.

OBJECTIVE: The aim of the survey was to evaluate Toxoplasma gondii seroprevalence in small ruminants and possible risk factors associated with the infection. MATERIALS AND METHODS: Sera from 474 goats and 502 sheep reared on 42 farms in northern Italy were collected and tested for IgG antibodies to T. gondii by IFAT (indirect immunofluorescence antibody test). To identify risk factors, a binary logistic regression analysis of the variables was performed. An audit form about farm management was used. RESULTS: Antibodies to T. gondii were found in 96.6% of goat farms and in 87.5% of sheep farms; 41.7% goats and 59.3% sheep resulted positive. Seroprevalence was significantly higher in sheep than in goats. Seroprevalence values were similar in goats from eastern and western areas, whereas goats from the southern area were at lower risk of infection. Saanen goats presented the lowest seroprevalence (30.7 %), whereas cross-breed exhibited the highest rate (48.7%). Goats from farms housing both sheep and goats had an infection risk 1.39 times higher than goats from farms that did not house sheep. Animals bred on intensive farms showed lower prevalence (22.1%) in comparison with those from extensive (45.6%) or semi-intensive farms (60%). Sampling area was one of the strongest predictors of T. gondii infection in sheep flocks. Transhumant flocks showed a higher risk of infection by T. gondii compared with semi-intensive farms (66.8% vs. 38.4%). CONCLUSIONS: The highest T. gondii seroprevalence values were registered in transhumant flocks of sheep and in family businesses rearing goats. As these traditional activities represent an important resource for the conservation of the territory and its economy, management practices for a better control of the disease should be improved.

Molecular and serological detection of tick-borne pathogens in donkeys (Equus asinus) in Italy.

Donkeys, owing to the frequent outdoor activity, are exposed to a high risk of infection with tick-borne pathogens. This work aimed to detect exposure to Theileria equi, Babesia caballi, Anaplasma phagocytophilum and Borrelia burgdorferi s.l. of donkeys reared in Central Italy. For this purpose 122 adult donkeys were selected within 11 herds and submitted to blood collection. IgG antibodies to T. equi, B. caballi, A. phagocytophilum and B. burgdorferi s.l. were detected by IFAT. Conventional PCRs targeting the genes MSP2 and the flagellin were used for the detection of A. phagocytophilum and B. burgdorferi s.l. respectively and a Real Time PCR Sybr Green was used to detect Babesia/Theileria spp…. The species identity was determined by amplicons sequencing. Forty eight (39.3%) and 58 (47.5%) animals tested positive for T. equi and B. caballi antibodies, respectively; nine animals (7.4%) were found positive for antibodies against A. phagocytophilum whereas negative results were obtained for B. burgdorferi s.l. Twenty-six (21.3%) animals showed antibodies for both T. equi and B. caballi. Twenty-three (18.8%) donkeys were positive to Babesia/Theileria spp. PCR assay. Out of 21 sequenced amplicons, 20 were identified as T. equi, belonging to three main groups designated A, B and D and one as B. caballi group A. Neither A. phagocytophilum nor B. burgdorferi PCR results were positive. The study showed a high exposure of donkeys to tick-borne pathogens and provides information on the genetic identity of the T. equi strains circulating in Central Italy.

A blueprint for DNA vaccine design.

Although safety concerns have been overcome, lower immunogenicity profiles of DNA vaccines have hindered their progress in humans. DNA vaccines need to make up for this limitation by altering plasmid construction through vector design innovations intended for enhancement of transgene expression and immunogenicity. The next-generation vectors also address safety issues such as selection markers. This chapter discusses (a) plasmid backbone design, (b) enhancement of antigenic protein expression and immunogenicity, and (c) vector modification to increase innate immunity. Modifications of the basic design, when combined with improved delivery devices and/or prime/boost regimens, may enhance DNA vaccine performance and clinical outcomes.

Enhancement of plasmid-mediated transgene expression.

A large number of studies aimed at the treatment of cancer, autoimmune and metabolic diseases, neurodegenerative disorders, allergic diseases, as well as muscle disorders strengthen the fact that gene therapy could represent an alternative method to treat human diseases where conventional approaches are less effective. To improve transgene expression from plasmid vectors, DNA nuclear targeting sequences (DTSs) can be introduced in a vector backbone to increase in vivo expression up to 20-fold using electroporation (EP) delivery in muscle tissue. The purpose of this chapter is to represent a step-by-step strategy for the construction of a plasmid vector with enhanced efficiency of nuclear plasmid uptake and the methodic for the in vivo efficiency evaluation of the obtained expression vector.

Strategies for improving DNA vaccine performance.

The goal of active vaccination is to induce all the immune effector pathways and to establish immunological memory allowing prolonged surveillance against pathogens or cancer cells. DNA vaccination platform is an intriguing strategy owing to its ability to mobilize both branches of the immune system (i.e., innate immunity as well as adaptive immunity). Since plasmids offer several advantages for biotechnological applications due to their modular structure and easy manipulation, a wide range of strategies can be applied to improve DNA vaccine performance. This chapter discusses this topic in detail taking into account antigen/epitope selection and optimization, inclusion of intracellular targeting sequences and genetic adjuvants, and provision of T cell help.

Evaluation of the performance of a rapid enzyme-linked immunosorbent assay in the detection of Anaplasma phagocytophilum antibodies in horses.

The aim of this study was to evaluate the performance of a commercially available rapid enzyme-linked immonosorbent assay, the Snap® 4Dx test, in the detection of Anaplasma phagocytophilum antibodies in horses. Two hundred apparently healthy horses (asymptomatic) and 244 animals showing clinical symptoms (symptomatic), were tested for A. phagocytophilum immunoglobulin G (IgG) antibodies using both the Snap® 4Dx kit and an indirect fluorescence antibody test (IFAT), with the latter serving as a comparative test. Horses belonging to the symptomatic group were also tested for evidence of active infection with A. phagocytophilum by analysis of IFAT IgM titers and PCR assay amplifying a specific fragment of the 16S rRNA gene. The overall agreement between the results obtained using the two tests, as well as the relative performance exhibited by the Snap® 4Dx test in the two groups, was assessed. Forty of the 45 animals (89%) testing positive for IgG antibodies using IFAT were correctly identified using Snap® 4Dx testing. The agreement between the results of the two tests was very high (k>0.9), with almost identical performances in both symptomatic and asymptomatic animals. Conversely, within the symptomatic group, only 44% (no. 11/25) of Snap® 4Dx positives appeared to be associated with a state of active infection, whereas the remaining 56% (no. 14/25) were related both to not infected animals (no. 1) and to horses whose status of infection needed further evaluations to be confirmed (no. 13/25). This study suggests that the Snap® 4Dx test could represent a valid screening method for use during epidemiological surveys of equine populations. Nevertheless, in-clinic application of the test does not appear to be merited.

Recent advances in design of immunogenic and effective naked DNA vaccines against cancer.

A variety of clinical trials for vaccines against cancer have provided evidence that DNA vaccines are well tolerated and have an excellent safety profile. DNA vaccines require much improvement to make them sufficiently effective against cancer in the clinic. Nowadays, it is clear that an increased antigen expression correlates with improved immunogenicity and it is critical to vaccine performance in large animals and humans. Similarly, additional strategies are required to activate effective immunity against poorly immunogenic tumour antigens. This review discusses very recent scientific references focused on the development of sophisticated DNA vaccines against cancer. We report a selection of novel and relevant patents employed to improve their immunogenicity through several strategies such as the use of tissue-specific transcriptional elements, nuclear localisation signalling, codon-optimisation and by targeting antigenic proteins to secretory pathway. Recent patents validating portions or splice variants of tumour antigens as candidates for cancer DNA vaccines with improved specificity, such as mesothelin and hTERT, are also discussed. Lastly, we review novel patents on the use of genetic immunomodulators, such as "universal" T helper epitopes derived from tetanus toxin, E. coli heat labile enterotoxin and vegetable proteins, as well as cytokines, chemokines or costimulatory molecules such as IL-6, IL-15, IL- 21 to amplify immunity against cancer.

Seroprevalence of Toxoplasma gondii in wild boars (Sus scrofa) from Central Italy.

Wild and farmed game meat consumption has been highlighted as an emerging risk factor for Toxoplasma gondii infection in humans. In Central Italy wild boar is widely distributed and is also one of the most popular game species. The main goal of the present study was to estimate the seroprevalence of T. gondii antibodies through a serological survey conducted on 400 hunted wild boars (250 males and 150 females) during three subsequent hunting seasons (2009-2011), using an Immunofluorescence Antibody Assay. The animals were sorted by age, determined on the evaluation of the dental table; 101 were <1 year old, 175 from 1 to 3 years, and 124 > 3 years. Antibodies against T. gondii were detected in 56 (14%) serum samples with titers ranging from 40 to ≥160; a significant association (p < 0.05) was found between seropositivity and age, but not gender, hunting districts, or year of sampling.

Efficacy of toltrazuril 5 % suspension (Baycox®, Bayer) and diclazuril (Vecoxan®, Janssen-Cilag) in the control of Eimeria spp. in lambs.

Sheep coccidiosis is a pathology caused by protozoan parasites of the genus Eimeria spp. with clinical and economic effect especially in young animals (Ambrosi 1995; Pellérdy 1974). A field study was conducted to evaluate the efficacy of a metaphylactic treatment with toltrazuril 5 % suspension (Baycox®, Bayer) in comparison with diclazuril (Vecoxan®, Janssen-Cilag) and untreated controls against naturally acquired Eimeria infections in housed lambs. A total of 170 animals, aged 24 to 34 days and randomly divided in three homogeneous groups, were included in the study. The assessment of treatment efficacy was based on total faecal oocyst excretion (opg) and count reduction (FOCR) in the two groups of animals treated with toltrazuril (TOLT) and diclazuril (DICL) compared with untreated control group (C). The animals treated with toltrazuril showed a considerably lower mean opg to that of group C (5.78 opg versus 144.62 opg) (p < 0.05) and a FOCR of 97.7 %. The higher efficacy (99.23 %) was observed at 15 days post treatment; however, the average efficacy of the drug remained extremely high (> 90 %) for all the study. The lambs treated with diclazuril showed an intense, persistent oocyst excretion with average levels of 97.54 opg, (p < 0.05). This study demonstrates the good efficacy of toltrazuril administered orally to lambs in the prepatent period in subclinical natural Eimeria infections in housed lambs.