Lysine metabolism in antisense C-hordein barley grains

The grain proteins of barley are deficient in lysine and threonine due to their low concentrations in the major storage protein class, the hordeins, especially in the C-hordein subgroup. Previously produced antisense C-hordein transgenic barley lines have an improved amino acid composition, with increased lysine, methionine and threonine contents. The objective of the study was to investigate the possible changes in the regulation of key enzymes of the aspartate metabolic pathway and the contents of aspartate-derived amino acids in the nontransgenic line (Hordeum vulgare L. cv. Golden Promise) and five antisense C-hordein transgenic barley lines. Considering the amounts of soluble and protein-bound aspartate-derived amino acids together with the analysis of key enzymes of aspartate metabolic pathway, we suggest that the C-hordein suppression did not only alter the metabolism of at least one aspartate-derived amino acid (threonine), but major changes were also detected in the metabolism of lysine and methionine. Modifications in the activities and regulation of aspartate kinase, dihydrodipicolinate synthase and homoserine dehydrogenase were observed in most transgenic lines. Furthermore the activities of lysine α-ketoglutarate reductase and saccharopine dehydrogenase were also altered, although the extent varied among the transgenic lines.

Laboratory tests of low density astrophysical nuclear equations of state

Clustering in low density nuclear matter has been investigated using the NIMROD multidetector at Texas A&M University. Thermal coalescence modes were employed to extract densities, ρ, and temperatures, T, for evolving systems formed in collisions of 47A MeV (40)Ar+(112)Sn, (124)Sn and (64)Zn+(112)Sn, (124)Sn. The yields of d, t, (3)He, and (4)He have been determined at ρ=0.002 to 0.03 nucleons/fm(3) and T=5 to 11 MeV. The experimentally derived equilibrium constants for α particle production are compared with those predicted by a number of astrophysical equations of state. The data provide important new constraints on the model calculations.

Experimental determination of in-medium cluster binding energies and Mott points in nuclear matter

In-medium binding energies and Mott points for d, t, 3He and α clusters in low-density nuclear matter have been determined at specific combinations of temperature and density in low-density nuclear matter produced in collisions of 47A MeV 40Ar and 64Zn projectiles with 112Sn and 124Sn target nuclei. The experimentally derived values of the in-medium modified binding energies are in good agreement with recent theoretical predictions based upon the implementation of Pauli blocking effects in a quantum statistical approach.

Zoonoses in the European Union: origin, distribution and dynamics - the EFSA-ECDC summary report 2009

We present a summary of the main findings of the latest report of the European Food Safety Authority and European Centre for Disease Prevention and Control on zoonoses, zoonotic agents and food-borne outbreaks in the European Union (EU), based on data from 2009. Zoonoses are prevalent and widely distributed across several countries in the EU. The most important highlight of this report was the continuous decrease of human salmonellosis since 2005, probably due to effective control programmes in livestock.

Zoonoses in the European Union: origin, distribution and dynamics - the EFSA-ECDC summary report 2009

We present a summary of the main findings of the latest report of the European Food Safety Authority and European Centre for Disease Prevention and Control on zoonoses, zoonotic agents and food-borne outbreaks in the European Union (EU), based on data from 2009. Zoonoses are prevalent and widely distributed across several countries in the EU. The most important highlight of this report was the continuous decrease of human salmonellosis since 2005, probably due to effective control programmes in livestock.

Surveillance system and rapid tracing of primary sources in food-borne outbreaks by Salmonella spp. Part II: Molecular characterisation of some strains of Salmonella enterica serovars Enteritidis and Typhimurium

Salmonella enterica serovars Enteritidis and Typhimurium are the serotypes most frequently isolated from human cases. Traditional surveillance systems, based on serological characterisation and epidemiology, are not able to identify these common strains that cause outbreaks in humans. Innovative techniques are therefore necessary to accurately characterise these serotypes and hence accelerate the identification of the primary sources. Within a larger study, the goal of which was to develop an active surveillance system for outbreaks of food-borne diseases, characterisation of 42 Salmonella strains was performed using molecular techniques (pulsed field gel electrophoresis [PFGE] and random amplified polymorphic DNA [RAPD]), together with the Kirby-Bauer antibiotic assay. Results showed that both techniques were unable to satisfactorily characterise the Enteritidis serotype, while only PFGE identified the Typhimurium serotype.

Surveillance system and rapid tracing of primary sources in foodborne outbreaks by Salmonella spp. Part I: Identification of outbreaks in the Abruzzo region of Italy

The determination of the origin of foodborne diseases is one of the top priorities for the world health community. Gastroenteritis caused by zoonotic Salmonella serovars is one of the major threats to human health. It is essential that surveillance systems are able to monitor the incidence of human cases and to provide useful data to plan and implement effective prevention strategies. Surveillance systems generate information that is of value both for the early detection of infection and for the identification of epidemiological trends and risk factors. The authors describe a surveillance system for the identification of the sources of infection foodborne disease outbreaks caused by Salmonella in the Abruzzo region of Italy between April 2000 and October 2002.

Hygienic quality and freshness of shell eggs collected at retail outlets in Italy

Shell eggs sampled at retail outlets in two large Italian cities were tested to assess their freshness, food safety and the presence of veterinary drug residues. Some samples were found to be irregular due to lack of compliance with freshness requirements or shells were tainted by micro-cracks and foreign material. The most severe case of non-compliance was due to the presence of veterinary drug residues that either exceeded either the maximum acceptable residue limits or drugs that were prohibited.

Behaviour of vaginal epithelial maturation and sex hormone binding globulin in post-menopausal breast cancer patients during the first year of tamoxifen therapy

To evaluate the effect of tamoxifen on vaginal epithelial maturation and on oestrogen-related hepatic synthesis, we prospectively studied the karyopyknotic index (KPI), the maturation index (MI), expressed as a percentage of parabasal (MI-1), intermediate (MI-2) and superficial (MI-3) cells, as well as the serum levels of the oestrogen-dependent sex hormone binding globulin (SHBG). Tests were performed at baseline, after 1, 3, 6 and 12 months of therapy in 64 post-menopausal breast cancer patients. Basal KPI ranged from 0 to 9 (mean 1.5 +/- 0.3) and rose 13.5-fold to 21 +/- 2.5 (P = 0.000) after the first 30 days of tamoxifen. Absence of KPI rise was observed in 23% of patients. Pretreatment MI figures 1, 2 and 3 were 56.9 +/- 5.6, 41.7 +/- 5.4 and 1.4 +/- 0.3, respectively, and sharply shifted to the right (P = 0.000) after 1 month of therapy, indicating an increase of vaginal epithelial maturation. At baselines the SHBG mean value was 62.1 +/- 3.3 nmol/l and underwent an increase of 44% (P = 0.000) after 30 days of tamoxifen. All of these observed 1-month modifications remained stable up to the studied 12 months of therapy. Present findings indicate an early and persistent oestrogenic effect of tamoxifen on the vaginal epithelium and the hepatic synthesis of SHBG.

DNA index shift with disease progression in colorectal adenocarcinoma: a morphological and flow cytometric study

DNA index (DI) values seen in 86 sporadic colorectal adenocarcinomas were related to clinical, morphological, and disease progression features. DI, whose overall distribution was bimodal with peaks in the diploid and from hypotriploid to tetraploid ranges, was related to pathological lymph node staging (pN), staging, lymphoid reaction, and tubular configuration. With increasing severity in pathological features, an irregular shift in DI class prevalence was seen, with no steady increase from diploidy to higher degrees of aneuploidy. All UICC stage I tumors (13% of total) were aneuploid, 50% being hypertriploid; diploidy (35%) and hypertriploidy (22%) prevailed in stage II carcinomas (41% of total), diploidy (35%) and hypotriploidy (30%) in stage III (30% of total), and triploidy (33%) in stage IV (15% of total). Amongst features related to stage (lymphoid reaction, depth of neoplastic embolization, grading, tubular configuration, and polymorphism), few were associated with DI, and none influenced DI shift and class prevalence through the stages. The biological capabilities of colorectal adenocarcinoma in relation to stage are expressed by certain aneuploid DI classes (hypertriploidy: absence of extracolonic spread; hypotriploidy: lymph node metastases; triploidy: distant metastases). Diploidy is unrelated to criteria defining stage above I and predicts 50% of cases with development of metachronous metastases. Irregular DI class shift through the stages may be attributable to different pathways of cancerogenesis and disease progression in diploid versus aneuploid carcinomas. Alternatively, assuming that the diploid fraction in aneuploid tumors contains neoplastic cells, pure diploid carcinomas represent the selection of a vital clone that may give rise to a further mixed population whose aneuploid DI is different and best fitted to express the biological capabilities of that given stage.

Isolation and identification of avian rotavirus from pheasant chicks with signs of clinical enteritis

Three rotaviruses were isolated from intestinal contents obtained from a flock of 6-8-day-old pheasant chicks showing diarrhoea and increased mortality. The isolates were characterized as avian group A rotavirus by immunoenzymatic technique (ELISA) and polyacrylamide gel electrophoresis (PAGE).

Isolation and characterization of cytopathic strains of rotavirus from hares (Lepus europaeus)

Ten cytopathic rotavirus were recovered from stools of leverets affected by an enteric syndrome. The ten isolates, examined by means of ELISA and SDS-PA-GE, were identified as group A rotaviruses.

Non-small cell lung cancer. Morphology and DNA flow cytometry

OBJECTIVE

To correlate stage-related and histologic features of non-small cell lung cancer (NSCLC) with DNA flow cytometric parameters.

STUDY DESIGN

The clinicopathologic features, DNA flow cytometric parameters (ploidy type, S-phase fraction and DNA index [DI]) of 72 surgically resected NSCLC were reviewed.

RESULTS

NSCLC were classified on the basis of their DI in diploid, peridiploid, hypotriploid, triploid, hypertriploid, tetraploid, hypertetraploid and multiploid tumors. DI was significantly related to pleural infiltration, pT, histologic type and evidence of necrosis. Tumors infiltrating the pleura were mostly triploid or hypertriploid; high pT stages were also hypertetraploid. Adenocarcinomas showed a wide DI distribution, squamous carcinomas were mostly diploid, triploid or hypertriploid and large cell carcinomas were mostly triploid, hypertriploid and hypertetraploid. The best combination of features able to predict disease relapse was pT plus pN plus grading and divergent differentiation.

CONCLUSION

Many stage-related and histologic features are associated with particular DI classes, which vary in relation to the feature itself and, in some cases, regardless of classical methods of grading and histologic typing. DNA content analysis highlights greater biologic heterogeneity in NSCLC than evidenced morphologically.

Liver function tests and lidocaine metabolism (MEGX test) during i.v. CMF therapy in breast cancer

The measurement of monoethylglycinexylidide (MEGX test) is considered a sensitive method for the evaluation of hepatic metabolic capacity. The multidrug chemotherapy CMF (cyclophosphamide 600 mg/m2, methotrexate 40 mg/ m2, 5-fluorouracil 600 mg/m2) is widely used in breast cancer patients but very few clinical studies have investigated its possible liver toxicity. We have prospectively evaluated the possible acute liver toxicity after a cycle (i.e. two courses) of CMF by means of the measurement of standard liver function tests and of MEGX, i.e. the main lidocaine (Lid) metabolite after the i.v. injection of Lid. Consecutive patients (n = 15), aged 43-68 years, were radically operated on because of M0 primary breast cancer and candidates for adjuvant CMF because of nodal axillary involvement (pN1) were studied. Tests were performed before the first (given at day 1) and 48 h after the second course (given at day 8) of an i.v. CMF regimen to be repeated every 28 days. Full blood count, serum ALT, AST, gamma-GT, alkaline phosphatase and albumin were measured with standard methods. To investigate the appearance of MEGX, blood samples were taken before, and 5, 10, 15, 20, 25, 30 and 60 min after i.v. Lid injection. MEGX serum concentration was measured by means of a fluorescent polarization immunoassay. We found no significant variation between pre- and post-CMF standard liver function tests with the exception of ALT levels, which, however, decreased (mean 48%, p < 0.05). The MEGX serum concentration was significantly increased over the sampling time period and the 42% mean rise was statistically significant (p < 0.001). Moreover, the post-CMF increase of circulating MEGX was steeper than the basal pre-CMF values. The slopes relating to the curves of MEGX formation over the first 20 min were 3.30 and 2.24, respectively (p < 0.001). In conclusion, no hepatic acute toxicity was observed during the CMF chemotherapy. Further studies are required to understand the meaning of the unexpected MEGX rise.

DNA flow cytometry and glial fibrillary acidic protein reactivity in pleomorphic adenomas of the salivary glands

OBJECTIVE

To evaluate and correlate morphologic features, glial fibrillary acidic protein (GFAP) reactivity and DNA content parameters in 32 pleomorphic adenomas of the salivary glands.

STUDY DESIGN

The adenomas were subclassified according to the proportion of stroma and type of stromal differentiation. DNA flow cytometry was carried out on paraffin-embedded material. GFAP reactivity was determined immunohistochemically and evaluated as the percentage of positive cells. Follow-up ranged from 17 to 71 months; no recurrences were observed.

RESULTS

Seven cases were aneuploid, 10 peridiploid and 15 diploid. Nondiploid tumors had a significantly higher S-phase fraction. Nondiploid adenomas were significantly associated with a greater percentage of stroma, while S-phase fraction showed only a trend toward being higher in tumors with a greater quota of stroma. Ploidy type and S-phase fraction were unrelated to sex, age, tumor diameter or site. GFAP reactivity was unrelated to subtype or S-phase fraction; a higher frequency of diploid tumors was seen among cases with a greater number of reactive cells.

CONCLUSION

Aneuploidy is present in a significant percentage of typical cases. It is unrelated to tumor bulk and appears to have no effect on recurrence as long as surgical excision is complete.

Effects of cis-platinum and luteinizing hormone releasing hormone analogues on rat spermatogenesis. A morphologic and flow cytometric study

OBJECTIVE

To evaluate morphologically and flow cytometrically the effects of cis-platinum (cis-diaminedichloroplatinum [CDDP]) administered acutely and chronically with and without gonadotropin releasing hormone analogue (LRA) pretreatment on adult rats to verify the feasibility of protecting the spermatic epithelium before chemotherapy.

STUDY DESIGN

Six groups of adult Wistar rats were studied: 2 were treated with an LD50 dose of CDDP in single and 2 in multiple administrations, 1 of each was pretreated with LRA and 1 LRA control and one untreated group were also evaluated. Relative frequency of spermatogenic phases, qualitative alterations, Johnsen's score and percentage of cells in each DNA region were determined.

RESULTS

Acute CDDP treatment reduced spermatids, spermatozoa and haploid cells. Chronic CDDP treatment induced in some rats a reduction in tetraploid cells and in others an increase associated with morphologically abnormal spermatids and cells showing aberrant hypodiploid content in analogy to all chronic CDDP LRA-pretreated animals.

CONCLUSION

Single-dose CDDP reduces spermatids by killing rapidly cycling spermatogonia and inducing alterations in maturation; in repeated doses, more marked reductions in spermatogonia are seen, followed by a compensatory proliferation of residual stem cells with generation of cells with an aberrant DNA content. These alterations are not prevented by LRA treatment sufficient to determine inhibition of serum testosterone levels.

Cyclosporin A increases somatomedin C insulin-like growth factor I levels in chronic rheumatic diseases

OBJECTIVE

To determine whether anabolic hormones that affect the musculoskeletal system and active on the immune cells changed during cyclosporin A (CysA) therapy.

METHODS

We carried out a randomized study of patients with rheumatic disease attending the outpatient clinic for rheumatic diseases. Twenty-four patients with chronic arthritis [20 with rheumatoid arthritis (RA) and 4 with psoriatic arthritis (PsA)] were divided into 2 groups (10 RA, 2 PsA) and randomly given CysA 5 mg/kg daily or hydroxychloroquine (OH-Chlor) 6 mg/kg daily in divided doses.

RESULTS

A significant increase of insulin-like growth factor I (IGF-I) (somatomedin C) levels and of bone Gla protein was shown after 2 months in the CysA treated group, but not in the OH-Chlor group. A statistically significant correlation was observed between changes of IGF-I levels and of dehydroepiandrosterone sulphate (DHEAS). This finding was confirmed in a further series of 39 patients. No changes were seen in 25 OH-D, 1-25(OH)2-D3 or parathyroid hormone after CysA.

CONCLUSION

The effects of CysA on IGF-I may explain some of the clinical, immunologic, and metabolic results during CysA treatment of rheumatic diseases.

Molecular epidemiology of bovine rotaviruses. Characterization of rotaviruses isolated from diarrhoeic calves by genome profile analysis

Fifteen bovine rotavirus group A strains were isolated in several Italian regions over the period 1981-1989 from calves in ten neonatal diarrhoea outbreaks. The electrophoretical analysis of the genoma showed genomic variations and five different profiles were observed, including one with thirteen dsRNA segments. The finding of extra RNA fragments, with respect to the regular eleven genome segments, suggests the possibility of simultaneous or sequential infection by more than one electropherotype or a modification in the length of RNA segments during infection.

Electrophoretic typing of some strains of enteric viruses isolated in rabbits suffering from diarrhoea

Fifty strains of enteric viruses were isolated on MA-104 cell cultures from the diarrhoeic stools of rabbits from Tuscan and Umbrian breedings. Four of these were identified by means of serological and electrophoretical assays as Group A rotavirus; one produced a negative result in the ELISA test and an electrophoretic pattern related to reovirus.

Somatomedin C (insulin-like growth factor 1) levels decrease during acute changes of stress related hormones. Relevance for fibromyalgia

OBJECTIVE

To determine the effects of stress hormones on insulin-like growth factor 1 (IGF-1).

METHODS

Insulin induced hypoglycemia (< 3 mmol/l) and clonidine induced depression of noradrenergic tone were used to assess the acute effects of cortisol, human growth hormone (hGH), and norepinephrine (NE).

RESULTS

Despite the increase of hGH during hypoglycemia, a statistically significant decrease of IGF-1 was observed along with the expected rise of cortisol and NE. To eliminate the role played by NE, NE tone was depressed by administering clonidine. A statistically significant decrease of IGF-1 was also observed.

CONCLUSION

Acute cortisol release or a NE decrease induce low IGF-1 levels.

Isolation and identification of rotaviruses as aetiological agents of neonatal diarrhoea in kids. Electrophoretical characterization by PAGE

Six strains of cytopathogenic enteric virus for the continuous cell line MA-104 were isolated from samples of the diarrhoeic stools of kids (Capra hyrcus) with acute enteritis. The samples were obtained from two stock farms (RM and SI) in central Italy. Four viruses from the RM stock were identified as rotaviruses of the antigenic group A by the Elisa test performed with SA-11 antirotavirus monoclonal antibodies and the direct immunofluorescence test with IgG bovine antirotavirus. Electrophoretical analysis of the viral dsRNA in these strains showed a pattern of eleven bands arranged in the typical "long pattern" of rotavirus group A. Two electrophoretical variants were identified in two separate cases of neonatal diarrhoea in the RM stock over a period of one year. The other two strains, one isolated in the RM stock and the other in the SI stock, gave negative results in serological tests for antigenic group A rotavirus and showed a double chain RNA consisting of 9-10 segments, unrelated to rotavirus or pararotavirus.