Granulysin Expression in Lymphocytes that Populate the Peripheral Blood and the Myocardium after an Acute Coronary Event.

We aimed to analyse granulysin (GNLY)-mediated cytotoxicity in the peripheral blood of patients with non-ST-segment elevation myocardial infarction (NSTEMI) treated with anti-ischaemic drug therapy. Thirty-nine NSTEMI patients with a median age of 70 years and 28 age-matched healthy subjects were enrolled in this study. On day 7 after MI, the number of GNLY(+) lymphocytes in the peripheral blood increased approximately six-fold of that in the healthy subjects, measured by flow cytometry. On day 14, the number of GNLY(+) cells significantly decreased in T, NKT, and both CD56(+dim) and CD56(+bright) NK subsets. GNLY(+) CD3(+) and GNLY(+) CD56(+) cells infiltrated central zone of myocardial infarction (MI). In persons who died in the first week after MI, GNLY(+) cells were found within accumulation of apoptotic leucocytes and reached the apoptotic cardiomyocytes in border MI zones probably due to the influence of interleukin-15 in peri-necrotic cardiomyocytes, as it is was shown by immunohistology. By day 28, the percentage of GNLY(+) lymphocytes in peripheral blood returned to the levels similar to that of the healthy subjects. Anti-GNLY mAb decreased apoptosis of K562 targets using peripheral blood NK cells from days 7 and 28 after MI, while in assays using cells from days 1 and 21, both anti-GNLY and anti-perforin mAbs were required to significantly decrease apoptosis. Using NK cells from day 14, K562 apoptosis was nearly absent. In conclusion, it seems that GNLY(+) lymphocytes, probably attracted by IL-15, not only participate partially in myocardial cell apoptosis, but also hasten resolution of cardiac leucocyte infiltration in patients with NSTEMI.

Elastographic parameters of liver steatosis and fibrosis predict independently the risk of incident chronic kidney disease and acute myocardial infarction in patients with type 2 diabetes mellitus.

AIMS: The aim of this prospective study was to examine the relationship between controlled attenuation parameter (CAP) and liver stiffness measurements (LSM) with the risk of developing a composite endpoint inclusive of incident acute myocardial infarction (AMI), cerebrovascular insult (CVI) or chronic kidney disease (CKD) in people with type 2 diabetes mellitus (T2DM). METHODS: This study included 238 T2DM outpatients without chronic liver diseases. RESULTS: The patient population was followed for a median period of 7.6 years. Kaplan-Meier survival analyses showed that there was a higher proportion of patients who developed the aforementioned composite outcome (P < 0.001 by the log-rank test), as well as CKD (P < 0.001) or AMI alone (P = 0.014) among those with elevated CAP values (≥238 dB/m) at baseline. Similarly, Kaplan-Meier survival analyses showed that there was a higher proportion of patients who developed the composite outcome (P < 0.001), as well as CKD (P < 0.001), or AMI alone (P < 0.001) among those with elevated LSM values (≥7.0/6.2 kPa). In multivariable regression analyses, the presence of elevated CAP (adjusted-hazard ratio 2.34, 95% CI 1.32-4.15) and elevated LSM (adjusted-hazard ratio 2.84, 95% CI 1.92-4.21), independently of each other, were associated with a higher risk of developing the composite outcome, as well as incident AMI or CKD alone after adjusting for traditional cardiovascular risk factors and diabetes-related variables. CONCLUSIONS: Our study shows that the elastographic parameters of liver steatosis and fibrosis independently predict the long-term risk of developing chronic vascular complications in T2DM patients.

Perforin-mediated cytotoxicity in non-ST elevation myocardial infarction.

The aim of this investigation was to examine the role of perforin (P)-mediated cytotoxicity in the dynamics of tissue damage in patients with non-ST-segment elevation myocardial infarction (NSTEMI) treated with anti-ischaemic drugs. We enrolled 48 patients with NSTEMI in this study [age, 71.5 years; 61.5/76 (median, 25th/75th percentiles)]. The percentage of total peripheral blood P(+) lymphocytes was elevated owing to the increased frequency of P(+) cells within natural killer (NK) subsets, T and NKT cells in patients on day 1 after NSTEMI when compared with healthy controls. Positive correlations were found between cardiac troponin I plasma concentrations and the frequency of P(+) cells, P(+) T cells, P(+) NK cells and their CD56(+dim) and CD56(+bright) subsets during the first week after the NSTEMI. The expression of P in NK cells was accompanied by P-mediated cytotoxicity against K-562 targets at all days examined, except day 21, when an anti-perforin monoclonal antibody did not completely abolish the killing. The percentage of P(+) T cells, P(+) NKT cells and P(+) NK subsets was the highest on the day 1 after NSTEMI and decreased in the post-infarction period. CD56(+) lymphocytes were found in damaged myocardium, suggesting their tissue recruitment. In conclusion, patients with NSTEMI have a strong and prolonged P-mediated systemic inflammatory reaction, which may sustain autoaggressive reactions towards myocardial tissue during the development of myocardial infarction.

Significant liver fibrosis, as assessed by fibroscan, is independently associated with chronic vascular complications of type 2 diabetes: A multicenter study.

AIMS: The aim of this study was to investigate whether controlled attenuation parameter (CAP) and liver stiffness measurement (LSM), as assessed by vibration-controlled transient elastography (VCTE), are associated with chronic vascular complications of diabetes mellitus type 2 (T2DM). METHODS: We studied 442 outpatients with established T2DM, and who underwent VCTE and extensive assessment of chronic vascular complications of diabetes. RESULTS: A quarter of analyzed patients had a previous history of myocardial infarction and/or ischemic stroke, and about half of them had at least one microvascular complication (chronic kidney disease (CKD), retinopathy or polyneuropathy). The prevalence of liver steatosis (i.e., CAP ≥ 238 dB/m) and significant liver fibrosis (i.e., LSM ≥ 7.0/6.2 kPa) was 84.2% and 46.6%, respectively. Significant liver fibrosis was associated with an increased likelihood of having myocardial infarction (adjusted-odds ratio 6.61, 95%CI 1.66-37.4), peripheral polyneuropathy (adjusted-OR 4.55, 95%CI 1.25-16.6), CKD (adjusted-OR 4.54, 95%CI 1.24-16.6) or retinopathy (adjusted-OR 1.81, 95%CI 1.62-1.97), independently of cardiometabolic risk factors, diabetes-related variables, and other potential confounders. Liver steatosis was not independently associated with any macro-/microvascular diabetic complications. CONCLUSIONS: Significant liver fibrosis is strongly associated with the presence of macro-/microvascular complications in patients with T2DM. These results offer a new perspective on the follow-up of people with T2DM.

[Surveillance of Neisseria meningitidis in Argentina, 1993-2005: distribution of serogroups, serotypes and serosubtypes isolated from invasive disease]. / Vigilancia de Neisseria meningitidis en Argentina, 1993-2005: distribución de serogrupos, serotipos y serosubtipos causantes de enfermedad invasiva.

Neisseria meningitidis is an important cause of meningitis, bacteremia and septic shock syndrome. We herein present the distribution of serogroups, serotypes and serosubtypes of 2244 isolates of N. meningitidis from patients with meningitis or meningococcemia, received within the period 1993-2005, in the National Reference Laboratory, INEI-ANLIS "Dr. Carlos G. Malbrán", from 33 Argentine hospitals that are included in a National Network devoted to for the study of bacterial meningitis. Between 1993-1995, serogroup B was prevalent (66%) whereas in the period from 1995-2001, serogroup C prevailed (65%). However, following but after that period, the prevalence of serogroup B was recovered. In the last 5 years of the studied period, the serogroups Y and W135 represented as a whole a 15.6% as a whole whereas up to the year 2000 during the first 6 years they accounted for it was of 4.7%. Higher diversity in the distribution of serotypes and serosubtypes was observed within serogroup B. The nonsubtypable isolates throughout the period of study represented the 52.8%, this high percentage demonstrates the limited capacity of the serotyping for the determination of meningococcal/meningococcus subtypes. of meningococco.

Management of mixed type congenital mesoblastic nephroma: Case series and review of the literature.

Congenital mesoblastic nephroma (CMN) is the most common renal tumor of infancy; however, it occurs infrequently with an incidence of 1 : 125,000. The cellular and classical variants are the most common subtypes of tumors, with a mixed variant occurring infrequently. We describe two cases of mixed variant CMN, which presented within days of each other differing in their clinical behavior. The first case followed a typical course, previously described in the literature, while the other deviated significantly. Traditionally, CMN presents as large abdominal mass in the neonatal period associated with a paraneoplastic syndrome, which can result in hypertension or hypercalcemia. Surgical resection is curative in most cases and long-term prognosis is excellent. Hypertension rarely persists after removal of the tumor, but remained in one of our two patients.

Persistent endothelial dysfunction turns the frequent exacerbator COPD from respiratory disorder into a progressive pulmonary and systemic vascular disease.

Chronic obstructive pulmonary disease (COPD) is one of the leading causes of death in developed countries of the world, while the main cause of mortality and morbidity in COPD patients are acute exacerbations and cardiovascular diseases. With regard to the frequency of exacerbations the phenotype "frequent exacerbators" has been defined, which, besides a more severe clinical course and a significantly higher total mortality, is also characterised by an elevated risk of cardiovascular mortality, as some indicators show us. It is notable that during the exacerbation of COPD, next to other changes, a significant aggravation of endothelial function occurs while the ED and COPD relationship seems very complex and is still in greater part unknown. Making the pathophysiological link between the frequency of exacerbations of COPD and ED could change our understanding of the character of this type of pulmonary disease. We hypothesize that frequent exacerbator COPD is a progressive and generalised vascular disease, not only an isolated respiratory disorder with ancillary systemic effects. Our opinion is that differences in COPD phenotype do not only determine the clinical picture but could also be of key importance in defining the progressivity of the disease. ED, which in these patients persists between frequent exacerbations, could be the main cause of the progression of pulmonary disease, and not only of the high cardiovascular risk of these patients. Such a persistent ED in FE COPD, with its pro-inflammatory, vasoconstrictory and prothrombotic mechanisms, could contemporaneously induce new exacerbations of COPD, the progression of pulmonary changes and the development of systemic atherosclerosis as a main extrapulmonary manifestation in these patients. Such a model defines endothelium as a common soil of progressive pulmonary and cardiovascular changes in FE COPD. It can fully explain all the elements of the clinical course and co-morbidity in FE COPD, for which we still do not have adequate explanation.

Oxytocinase (CAP) activity in serum during normal pregnancy.

Reference values for the activity of oxytocinase were determined in the sera of 371 women during normal pregnancy. An exponential relationship between enzyme activities and gestational age was found. The activity of oxytocinase (CAP) increased progressively from the beginning to the end of pregnancy. Statistical evaluation showed a significant difference between the 5th and 2nd months, as well as after the 20th week of pregnancy.

[A case of human sparganosis in Argentina]. / Un caso de esparganosis humana en Argentina.

A male patient from Peru presented a nodule localized in the left costal region. All other clinical and laboratory data were normal. Upon biopsy, an helminth parasite emerged from the subcutaneous tissue, which presented a marked eosinophil infiltrate. The helminth was classified as a plerocercoid larva of Spirometra; the species was not determined. Since Spirometra are not common in Argentina, it is presumed that the patient was infested during his two year sojourn in the peruvian forest. Some epidemiological aspects are discussed. As far as we know, this is the first case of subcutaneous sparganosis and the second of sparganosis reported in Argentina.

Can we assess an acute myocardial infarction in patients with acute coronary syndrome according to diagnostic accuracy of heat shock proteins?

Heat shock proteins (HSPs) have changed very little with evolution, suggesting that they play important role(s) in cellular survival. Specifically, HSPs protect cells from induced cell death. Their expression is triggered by heat or other stress, such as ischemia. HSPs provide protection against protein denaturation, although they slightly differ with respect to group affiliation. Release of HSPs from necrotic and ischemic cardiomyocytes into the intercellular space and plasma may correlate with the intensity of the pro-inflammatory response observed during and immediately after myocardial infarction. We hypothesized that the plasma concentration of particularly inducible forms of HSPs from different groups (HSP 90, HSP 70, HSP 60 and/or HSP 20) can be used as early specific markers for diagnosing myocardial infarction in patients with acute coronary syndrome. Our hypothesis is supported by the following data: (I) HSP expression occurs very early after acute coronary events; (II) HSP concentrations increase rapidly in the peripheral blood; (III) HSP concentrations correlate with markers of myocardial necrosis and pro-inflammatory biochemical parameters. The magnitude of the increase in plasma HSP concentrations over initial concentrations during the period of highest sensitivity and specificity of the assay could be important for early detection of myocardial infarction and distinguishing it from unstable angina. We suggest that these parameters, along with close observation of patients with chest pain, will assist providers who must differentiate between acute myocardial damage and other organ diseases.

Harmful immune reactions during acute myocardial infarction.

Acute coronary syndrome, including myocardial infarction, can occur as a result of ischaemia-reperfusion injury caused by acute occlusion of the coronary vessel/s following the rupture of an atherosclerotic plaque. Superimposed thrombosis at the lesion obstructs blood supply to the myocardium causing myocardial necrosis and ischaemic inflammation. Although not fully described, researchers believe that this process is initiated by a dysfunctional endothelium that activates the nearby leukocytes in the blood stream, thus attracting them to the arterial wall and initiating a cascade of complex mechanisms that lead to myocardial infarction. Interestingly, this process is two sided as the leaking soluble factors from a damaged and/or necrotic myocardium enter the systemic circulation, activating the innate and adaptive cell-mediated immune responses, which include increasing cytotoxic mediators. We hypothesize that this unwanted side effect of increase in proinflammatory mediators can lead to harmful systemic immune reactions directed towards various dysfunctional endothelia. Additionally, a strong inflammatory response, caused by myocardial damage, can impair ventricular function, on top of baseline necrosis. To evaluate this hypothesis, we propose to use in vivo tests to measure endothelial dysfunction, as well as ventricular dysfunction by ultrasound methods, and their correlation with immunological and/or biochemical parameters. These tests will be useful in assessing the risk and therapeutic outcome in patients with acute coronary syndrome.

[Abdominal pregnancy terminating with a liveborn child]. / Abdominalna trudnoca sa zivorodenim detetom.

A case is presented of abdominal pregnancy in a pregnant woman with two previous deliveries and four spontaneous abortions. She was cachectic, had spider nevi, and palmar erythema. Hepatic insufficiency was suspected. In the 35th week of pregnancy, severe pain appeared in the epigastrium and a detailed examination indicated abdominal pregnancy. Following laparatomy, a liveborn was extracted, weight 1800 g, height 45 cm, without any malformations. Owing to an unfavourable insertion of the placenta and the patient's very bad condition, the placenta was left in situ, with the drainage of Douglas' space. Fourteen days after operation, the placenta was easily removed by relaparotomy. It was partly hyalinized and partly necrotic.

Vigilancia de Neisseria meningitidis en Argentina, 1993-2005: distribución de serogrupos, serotipos y serosubtipos causantes de enfermedad invasiva / Surveillance of Neisseria meningitidis in Argentina, 1993-2005: Distribution of serogroups, serotypes and serosubtypes isolated from invasive disease

Neisseria meningitidis es agente causal de enfermedades severas como meningitis, bacteriemia y síndrome de shock séptico. Se presenta la distribución en serogrupos, serotipos y serosubtipos de 2244 aislamientos de N. meningitidis obtenidos de cuadros de meningitis y/o meningococcemia durante el período 1993-2005 y analizados en el Laboratorio Nacional de Referencia del INEI-ANLIS "Dr. Carlos G. Malbrán". Estos aislamientos eran provenientes de 33 hospitales de todo el país, conformados en una red nacional de laboratorios para el estudio de meningitis bacteriana. Durante el período 1993-1995 prevaleció el serogrupo B (66%), mientras que entre los años 1995 y 2001 prevaleció el serogrupo C (65%); a partir de esta fecha se restableció la prevalencia de B. En los últimos 5 años los serogrupos Y y W135 representaron en su conjunto el 15,6%, mientras que hasta el año 2000 no superaron el 4,7%. Se registró mayor diversidad en la distribución de serotipos y serosubtipos dentro del serogrupo B que dentro del serogrupo C. Los aislamientos no subtipables durante todo el período de estudio representaron el 52,8%; este elevado porcentaje evidencia la limitada capacidad de la serología para la determinación de subtipos de meningococo.

Neisseria meningitidis is an important cause of meningitis, bacteremia and septic shock syndrome. We herein present the distribution of serogroups, serotypes and serosubtypes of 2244 isolates of N. meningitidis from patients with meningitis or meningococcemia, received within the period 1993-2005, in the National Reference Laboratory, INEI-ANLIS "Dr. Carlos G. Malbrán", from 33 Argentine hospitals that are included in a National Network devoted to for the study of bacterial meningitis. Between 1993-1995, serogroup B was prevalent (66%) whereas in the period from 1995-2001, serogroup C prevailed (65%). However, following but after that period, the prevalence of serogroup B was recovered. In the last 5 years of the studied period, the serogroups Y and W135 represented as a whole a 15.6% as a whole whereas up to the year 2000 during the first 6 years they accounted for it was of 4.7%. Higher diversity in the distribution of serotypes and serosubtypes was observed within serogroup B. The nonsubtypable isolates throughout the period of study represented the 52.8%, this high percentage demonstrates the limited capacity of the serotyping for the determination of meningococcal/meningococcus subtypes. of meningococco.