Chromatography-Independent Fractionation and Newly Identified Molecular Features of the Adzuki Bean (Vigna angularis Willd.) β-vignin Protein

Adzuki seed β-vignin, a vicilin-like globulin, has proven to exert various health-promoting biological activities, notably in cardiovascular health. A simple scalable enrichment procedure of this protein for further nutritional and functional studies is crucial. In this study, a simplified chromatography-independent protein fractionation procedure has been optimized and described. The electrophoretic analysis showed a high degree of homogeneity of β-vignin isolate. Furthermore, the molecular features of the purified protein were investigated. The adzuki bean β-vignin was found to have a native size of 146 kDa, and the molecular weight determined was consistent with a trimeric structure. These were identified in two main polypeptide chains (masses of 56-54 kDa) that are glycosylated polypeptides with metal binding capacity, and one minor polypeptide chain with a mass 37 kDa, wherein these features are absent. The in vitro analysis showed a high degree of digestibility of the protein (92%) and potential anti-inflammatory capacity. The results lay the basis not only for further investigation of the health-promoting properties of the adzuki bean β-vignin protein, but also for a possible application as nutraceutical molecule.

P1659Evolution of level of evidence c recommendations in European Society of Cardiology clinical practice guidelines on heart failure

Background

Over the past two decades, the European Society of Cardiology (ESC) Clinical Practice Guidelines (CPG) on Heart Failure has increasingly become a familiar part of Cardiology practice and are used worldwide. By creating objective standards, CPG provides a mechanism to assess decision-making and straightforward references for clinicians. Level of Evidence C recommendations are based on expert consensus and/or small retrospective studies and registries with limited and non-representative populations evaluated. The resulting directives need to be proven with better quality data to assess its true benefits.

Purpose

The purpose of our study was to describe and evaluate the evolution of Level of Evidence C recommendations of ESC CPG on Heart Failure and to provide a quality assessment of its benefits in the following years.

Methods

In this retrospective observational Case-Control study, we identified and collected all Level of Evidence C recommendations in five consecutive published documents of ESC CPG in the years 2001, 2005, 2008, 2012 and 2016. Each identified recommendation was classified between two major groups: Diagnostic and Complementary Exams (group 1) and Therapeutics and Interventions (group 2) and was followed up in the following documents. Primary outcomes were classified as: (1) Upgrade to Level of Evidence A or B [Upgrade], (2) Elimination or disproven benefit/harm [Downgrade] and (3) Maintenance or minor reformulation with unchanged benefit/harm [Maintenance]. We applied a Kaplan-Meyer survival analysis to estimate the probability of Upgrade or Downgrade in each group.

Results

A total of 239 different Level of Evidence C recommendations were submitted to the final analysis, 22.6% (n=54) in group 1 and 77.4% (n=185) in group 2. On follow-up, 35.2% (n=76) of recommendations were upgraded, 29.6% (n=64) were downgraded and 35.2% (n=76) were maintained. Regarding outcomes, the downgrade of recommendations occurred predominantly in group 2 (94.4%). Considering all the eliminated recommendations, 60.9% took place on the next following published ESC CPG document. Likewise, 60.5% of upgraded recommendations also occurred on the next following published ESC CPG document. The probability of upgrade or downgrade in the next following document was 52.8%, predominantly in the Therapeutics and Interventions group (37.5% vs 57.9%, p=0.012).

Figure 1

Conclusions

Level of Evidence C recommendations constitutes an important asset of ESC CPG on Heart Failure as they are usually updated on new treatment options and are developed by experts in the specific topic. However, the probability of elimination due to disproven benefit or potential harm was high (29.6%), particularly regarding therapeutics and interventions (94%). Since a significant fraction of Level of Evidence C recommendations remains unchanged on the following document (35%), the need for high-quality data, specifically regarding therapeutic interventions, is warranted.

The mutations and potential targets of the forkhead transcription factor FOXL2

Mutations of FOXL2, a gene encoding a forkhead transcription factor, have been shown to cause the blepharophimosis-ptosis-epicanthus inversus syndrome (BPES). This genetic disorder is characterized by eyelid and mild craniofacial abnormalities that can appear associated with premature ovarian failure. FOXL2 is one of the earliest ovarian markers and it offers, along with its targets, an excellent model to study ovarian development and function in normal and pathological conditions. In this review we summarize recent data concerning FOXL2, its mutations and its potential targets. Indeed, many mutations have been described in the coding sequence of FOXL2. Among them, polyalanine expansions and premature nonsense mutations have been shown to induce protein aggregation. In the context of the ovary, FOXL2 has been suggested to be involved in the regulation of cholesterol and steroid metabolism, apoptosis, reactive oxygen species detoxification and inflammation processes. The elucidation of the impact of FOXL2 mutations on its function will allow a better understanding of the pathogenic mechanisms underlying the BPES phenotype.

Allozyme diversity in three endemic species of Cistus (Cistaceae) from the Canary Islands: intraspecific and interspecific comparisons and implications for genetic conservation

Patterns of variation at 13 isozyme loci were examined in 11 populations in three Cistus species strictly endemic to the Canary Islands. Cistus osbaeckiaefolius and C. chinamadensis display low levels of isozyme variation associated with moderate to high interpopulation differentiation, which probably arose through historical bottlenecks in a landscape of habitat fragmentation, grazing, and human influence. By contrast, C. symphytifolius ranks among the subset of narrow endemics with high levels of isozyme variation and features different degrees of genetic structuring that are closely associated with taxonomic ascription. Low interpopulation differentiation in var. leucophyllus is possibly a reflection of its recent origin or of moderate levels of gene flow between its populations. High interpopulation differentiation in var. symphytifolius probably arose due to slight ecological differences between populations coupled with low levels of gene flow. Interpretation of neighbor-joining trees in the light of geological data substantiates the hypothesis that C. symphytifolius (or a very close relative) might be the ancestor of the other stands of Cistus in the islands. Conservation implications of our survey are the identification of the two populations of C. chinamadensis with the highest allele and genotype richness for preservation on genetic grounds and advice to prevent artificial gene flow in this taxon lest it might disrupt locally adapted gene combinations. All populations of C. osbaeckiaefolius should be given conservation priority on ecological grounds despite their genetic depauperation.

IgM and stromal cell-associated heparan sulfate/heparin as complement-independent ligands for CD19

The more severe phenotype of mice lacking CD19 as compared to CD21 suggests that a complement-independent ligand for the CD19/CD21 complex exists. We sought ligands for CD19 by examining binding reactions with fusion proteins comprised of the extracellular region of CD19 and the Fc region of IgG1. A fusion protein containing the third extracellular domain (D3-Fc) bound to WEHI-231 cells, and this was competed by soluble IgM. This function of IgM was confirmed by the binding of D3-Fc to beads coated with IgM. A second ligand for D3-Fc was found on stromal cells, and was shown to be heparin/heparan sulfate. These two ligands would be considered to reside on follicular dendritic cells, and may account for the observed ability of D3-Fc to bind to sites in germinal centers containing these cells.

[Traumatic lesions of the brachial plexus]

The diagnosis and treatment of brachial plexus lesions have developed remarkably in recent decades. The knowledge of anatomy and histology, the physiology of lesions, and the definition of ideal conditions for nervous regeneration created the basic support, which caused the use of microsurgery to improve the surgical results of these lesions. On the other hand, patients used to be seen by specialists from different fields, no one saw the need to join efforts in order to achieve a multidisciplinary approach. These lesions essentially affect young males who belong to a social and professional environment in which motorcycles are usually used as their main means of transport. The correct diagnosis of this histology is based on a clinical analysis of each case, which requires separate evaluations in some instances. Only thus is it possible to establish a therapeutic plan in which physiotherapy plays a permanent and vital role. Complementary studies always included electromyography, which seems to be a useful guide to the progression of the lesions. For operated cases, cervical myelography, ultrasonography and magnetic resonance seem to be a useful aid to characterise the lesions and define the prognosis. The therapeutic decisions must be early and convenient. We found all types of nervous lesions and performed various types of surgery with microsurgery techniques, mostly using nerve grafts. In the case of infra-ganglion lesions. nerve grafts were used to neurotize peripheral nerves from proximal stumps. In case of supra-ganglionic complete lesions, we used the accessory spinal nerve, the motor branches of the cervical plexus and the intercostal nerves. In relation to peripheral neurolization, we tried to establish a certain order, beginning with reinnervation of muscles responsible for proximal function.

Clonal B-cell expansions in peripheral blood of HCV-infected patients

Clonal expansions of IgM-producing B cells were investigated in 38 patients with a chronic hepatitis C virus infection. Eight patients were affected with type II mixed cryoglobulinaemia (two of whom also had non-Hodgkin's lymphoma and one had Waldenström's disease), one with type III mixed cryoglobulinaemia, one with Waldenström's disease, and 28 with chronic liver disease. To detect the clonal B-cell expansions we used a RT/PCR procedure in which the CDR3/FW4 regions of the IgM heavy chain mRNAs were amplified and resolved in sequencing polyacrylamide gels. Clonal Ig gene rearrangements were detected in all patients with type II mixed cryoglobulinaemia and also at a high frequency (24%) in the HCV-infected patients without cryoglobulinaemia. A polyclonal pattern was present in the patient with type III mixed cryoglobulinaemia and in the 15 normal individuals and 16 age-related patients with HCV-negative alcoholic liver disease which were investigated as controls. No association was found between the presence of a clonal B-cell expansion and age, sex, liver histology, or levels of serum aminotransferase. The serum levels of rheumatoid factor were increased in all patients with a clonal expansion, suggesting that the expanded B-cell clones belong to the rheumatoid factor producing B-cell subset.

[Obesity and dyslipidemia. Nature of an association]

Obesity is commonly associated with hyperlipidemia on the basis of clinical and epidemiological studies, but the mechanisms of that relationship are not well understood. To evaluate the contribution of obesity to fasting levels of total cholesterol, high-density lipoprotein cholesterol (HDL-C) and triglycerides (TG), we retrospectively analyzed data of 209 patients (175 women and 34 men) attending our outpatient clinic to lose weight. Hyperlipidemia, namely hypertriglyceridemia and low levels of HDL-C, was more frequent in more advanced grades of obesity. Fifty per cent of men with moderate obesity were found to have hypertriglyceridemia and 41.6% showed low levels of HDL-C. However, the relationship between obesity and hyperlipidemia is confounded by age and is not significant when body mass index (BMI) is correct for age. After this correction, we only found a significant correlation (r = 0.93, p = 0.01) between BMI and hypertriglyceridemia in female patients. We conclude that hyperlipidemia and obesity are associate but their relationship is weak and influenced by age. Also important in this relationship seems to be the distribution of body fat.

[Alcoholism in an industrial population: diagnosis, prevalence and conditioning factors]

The pattern of alcohol consumption has been studied among 92 males, workers in a factory of the Lisbon area. In this population there were three groups of ethanol consumers: I--non consumers, 6%; II--medium, up to 80g/day, 68%; III--heavy consumers, more than 80g/day, 26%. Another group (IV) was considered, for reference, with 23 patients with heavy alcoholism in the outpatients of an alcoholic addicts clinic. Besides the clinical questionnaire and medical examination, the following methods have been used and analysed: brief MAST; Le Gô, Mean Corpuscular Volume (MCV), serum glutamic oxalacetic Trasaminase (SGOT), and gama-glutamyl transpepticlase (gamma GT). The mean ethanol consumption in group IV was significantly higher than in group III (p less than 0.005), and in group III higher than in group II (p less than 0.001). Group IV demarked itself form group III due to a higher prevalence of symptoms of physical dependence (p less than 0.001), and of consumption of tranquilizers (p less than 0.01). In group III the sensitivity of brief MAST has been only 8.5% and of Le Gô 13%. An increased MCV was found in 20% of individuals in group I, 4.9% in group II, 20% in group IV. The SGOT was normal in groups I and II, and increased in 8.7% of group III and 30.4% of group IV (p less than 0.05). The gamma GT was normal in group I and abnormal in 4.7% of group IV (p less than 0.01). In conclusion, approximately 25% of the workers have an excessive ethanol consumption.(ABSTRACT TRUNCATED AT 250 WORDS)