Purpose
Previous studies have shown an increase in erythrocyte lipid peroxidation and a decrease in red blood cell (RBC) count, hemoglobin, and hematocrit after only one recreational scuba diving ...session. The aim of this study was to examine the effect of repetitive scuba diving on RBC parameters and erythropoiesis.
Methods
Divers (
N
= 14) conducted one dive per week over 5 weeks at a depth of 20–30 m for 30 min. For measuring RBC parameters, erythropoietin, iron, and ferritin, blood samples were collected before and after the first, third, and fifth dive.
Results
Between pre- and post-dive results, a statistically significant increase in RBC count, hemoglobin, hematocrit, mean corpuscular volume (MCV), RBC distribution width (RDW), iron, and ferritin was observed. Analysis of the results between the first, third, and fifth dive showed that the erythropoietin increase at the third (pre-dive
p
= 0.009; post-dive
p
= 0.004) and fifth dive (pre-dive
p
< 0.001; post-dive
p
= 0.003) was not accompanied by changes in RBC count, hemoglobin, iron, and ferritin. In parallel, a continuous increase in hematocrit, MCV, and RDW was observed, whereas mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC) decreased.
Conclusions
Changes in RBC indices and EPO elevation indicate that the occasional switch from hyperoxia to normoxia or mechanisms for plasma volume regulation may be a step in the maintenance of erythropoiesis.
Liver cirrhosis is an increasing public health problem and a major cause of morbidity and mortality. Accordingly, cirrhotic cardiomyopathy, a frequently underdiagnosed condition, is becoming a ...growing health problem. In the last 20 years, cardioselective biomarkers have been investigated for their diagnostic and prognostic properties for numerous conditions. The aim of this article is to review the literature on the relationship between the most commonly used cardioselective biomarkers (cardiac troponins I and T, N-terminal pro-B-type natriuretic peptide, brain natriuretic peptide, and heart-type fatty-acid binding protein) and the presence, functional stage, and clinical outcomes of liver cirrhosis. Elevated plasma levels of these biomarkers have been reported in patients with liver cirrhosis, and there is mounting evidence on their predictive value for clinical outcomes in this disease. In addition, elevated plasma levels of these biomarkers have been reported in patients before, during, and after liver transplantation, but in fewer studies. Due to their predictive value for clinical outcomes, we advocate the use of these markers in patients with liver cirrhosis and cirrhotic cardiomyopathy, as well as in candidates for liver transplant.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
: It has recently been shown that cardiac-specific troponin I concentrations in first morning urine samples can be measured with commercially available tests. Due to their accumulation in the first ...morning urine, scientific papers indicate a potential predictive value for cardiovascular diseases. Therefore, the aim of this study was to compare the concentration of cardiac troponin I in the first morning urine in patients with severe aortic stenosis and the healthy population.
: Blood and first morning urine samples were collected from 34 healthy individuals (17 female) at University Hospital Merkur and 25 patients with severe aortic stenosis (14 female) before surgical treatment at University Hospital Dubrava. Cardiac troponin I and T values were determined using high-sensitivity assays using commercially available Abbott and Roche tests.
: Patients with severe aortic stenosis had significantly lower troponin I concentrations in the first morning urine samples (0.3 ng/L (0.1-0.6)) as compared to the healthy population (15.2 ng/L (8.4-19.9)) (
< 0.001). There was no statistically significant difference in troponin T concentrations between healthy individuals and patients with severe aortic stenosis. In parallel, both I and T plasma troponin concentrations were significantly higher in patients with severe aortic stenosis.
: In patients with severe aortic stenosis, cardiac troponin I values in the first morning urine are significantly lower than in healthy subjects.
To understand better the adaptation response of the cardiovascular system (CVS) to self-contained underwater breathing apparatus (SCUBA) diving, Galectin-3 (Gal-3) and specific CVS biomarkers were ...measured in plasma of 16 male recreational divers before and after (30 min, 3 and 6 h) diving (total time of 30 min at 30 m depth) undertaken a after long non-dive period. The one-time SCUBA dive caused a significant increase in Gal-3, N-terminal prohormone of brain natriuretic peptide (NT-proBNP), high-sensitivity troponin-I (hs-TnI), and myoglobin immediately after diving. Whereas Gal-3 and myoglobin dropped down to the basal levels during the recovery period, NT-proBNP and hs-TnI concentration continued to increase. An immediate increase of vascular endothelial growth factor, detected immediately after diving, was followed by a significant decrease and return to the basal level, 3 and 6 h after diving, respectively. After a significant initial decrease, endothelin-1 increased during the recovery period, but did not return to the basal level. The observed changes in these biomarkers reflect comprehensive, but transient adaptation of CVS and muscular system to the specific environmental conditions during the SCUBA dive. Whether the recurrent activation of these adaption mechanisms due to repetitive dives has positive or negative effects on CVS remains to be elucidated.
Recreational SCUBA (rSCUBA) diving has become a highly popular and widespread sport. Yet, information on molecular events underlying (patho)physiological events that follow exposure to the specific ...environmental conditions (hyperbaric conditions, coldness, immersion, and elevated breathing pressure), in which rSCUBA diving is performed, remain largely unknown. Our previous study suggested that repeated rSCUBA diving triggers an adaptive response of cardiovascular and immune system. To elucidate further molecular events underlying cardiac and immune system adaptation and to exclude possible adverse effects we measured blood levels of specific cardiac and inflammation markers.
This longitudinal intervention study included fourteen recreational divers who performed five dives, one per week, on the depth 20-30 m that lasted 30 min, after the non-dive period of 5 months. Blood samples were taken immediately before and after the first, third, and fifth dives. Copeptin, immunoglobulins A, G and M, complement components C3 and C4, and differential blood count parameters, including neutrophil-to-lymphocyte ratio (NLR) were determined using standard laboratory methods. Cell-free DNA was measured by qPCR analysis and N-glycans released from IgG and total plasma proteins (TPP), were analyzed by hydrophilic interaction ultra-performance liquid chromatography.
Copeptin level increased after the first dive but decreased after the third and fifth dive. Increases in immunoglobulins level after every dive and during whole studied period were observed, but no changes in C3, C4, and cfDNA level were detected. NLR increased only after the first dive. IgG and TPP N-glycosylation alterations toward anti-inflammatory status over whole studied period were manifested as an increase in monogalyctosylated and core-fucosylated IgG N-glycans and decrease in agalactosylated TPP N-glycans.
rSCUBA diving practiced on a regular basis promotes anti-inflammatory status thus contributing cardioprotection and conferring multiple health benefits.
Portal hypertension (PH) drives the progression of liver cirrhosis to decompensation and death. Hepatic venous pressure gradient (HVPG) measurement is the standard of PH quantification, and HVPG≥10 ...mmHg defines clinically significant PH (CSPH). We performed proteomics-based serum profiling to search for a proteomic signature of CSPH in patients with compensated advanced chronic liver disease (cACLD).
Consecutive patients with histologically confirmed cACLD and results of HVPG measurements were prospectively included. Serum samples were pooled according to the presence/absence of CSPH and analysed by liquid chromatography-mass spectrometry. Gene set enrichment analysis was performed, followed by comprehensive literature review for proteins identified with the most striking difference between the groups.
We included 48 patients (30 with, and 18 without CSPH). Protein CD44, involved in the inflammatory response, vascular endothelial growth factor C (VEGF-C) and lymphatic vessel endothelial hyaluronan receptor-1 (LYVE-1), both involved in lymphangiogenesis were found solely in the CSPH group. Although identified in both groups, proteins involved in neutrophil extracellular traps (NET) formation, as well as tenascin C, autotaxin and nephronectin which mediate vascular contractility and lymphangiogenesis were more abundant in CSPH.
We propose that altered inflammatory response, including NET formation, vascular contractility and formation of new lymph vessels are key steps in PH development. Proteins such as CD44, VEGF-C, LYVE-1, tenascin C, Plasminogen activator inhibitor 1, Nephronectin, Bactericidal permeability-increasing protein, Autotaxin, Myeloperoxidase and a disintegrin and metalloproteinase with thrombospondin motifs-like protein 4 might be considered for further validation as potential therapeutic targets and candidate biomarkers of CSPH in cACLD.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
It has been shown that one recreational SCUBA (rSCUBA) diving session is sufficient to cause changes in plasma level of cardiovascular (CV) and muscular biomarkers. To explore whether repetitive ...rSCUBA diving triggers an adaptive response of the CV, muscular, and immune system, we measured the cardiac damage (NT‐proBNP, hs‐TnI, and CK‐MB), muscle damage (myoglobin (Mb), galectin‐3, CK, and LDH), vascular endothelial activation (ET‐1 and VEGF), and inflammatory (leukocyte count (Lkc), CRP, and IL‐6) biomarkers. A longitudinal intervention study included divers (N = 14) who conducted one dive per week over 5 weeks at the depth of 20–30 m for 30 min after a non‐dive period of 5 months. The blood samples were collected before and after the first, third, and fifth dives and specific biomarkers were measured in plasma or serum by the standard laboratory methods. The concentrations of the majority of measured biomarkers increased after every single dive; the exception was ET‐1 concentration that decreased. The cumulative effect of five dives has been reflected in diminishing changes in hs‐TnI, Mb, galectin‐3, ET‐1, VEGF, and IL‐6 levels, and more pronounced increases in NT‐proBNP and hs‐CRP levels. The median values of all measured biomarkers in all time points, except Mb, remained within the corresponding reference range. Repeatedly performed rSCUBA diving activates an adaptive response of the CV, muscular, and immune system that is reflected in changes in the specific biomarker concentration.
Under challenging environmental conditions, stress forces organisms to adapt to the rapidly changing surroundings. This is the first study on the cumulative effect of rSCUBA diving on the blood concentration of the majority of the selected biomarkers. Repeatedly performed recreational SCUBA diving triggered activation of an adaptive response of the cardiovascular, muscular, and immune systems that were reflected in changes in the specific biomarkers. No clinically relevant impairment of any observed systems was seen, but all measured biomarkers showed different dynamics of change with repeatedly performed rSCUBA diving. Studies on the cumulative effect of recreational SCUBA diving should be carefully designed, because the frequency of repeated dives seems to be crucial for triggering the adaptive response that could be recorded by the blood levels of the specific biomarkers.
Glioblastomas are among the most malignant tumors which, despite aggressive treatment, currently have an abysmal prognosis. These lesions are known to cause local and systemic perturbations in the ...coagulation system, leading to neo-angiogenesis and a high risk of venous thromboembolism. Indeed, there have been multiple proposals of the coagulation system being a possible target for future treatment of these patients. However, non-selective anticoagulant therapy has proven suboptimal and leads to a significant increase of intracranial hemorrhage. Thus, recognizing factors which lead to hyper-coagulation is considered paramount. Hyperglycemia is a well-known pro-thrombotic factor, a fact which has received little attention in neuro-oncology so-far. We previously hypothesized that patients with brain tumors could be highly susceptible to iatrogenic glycemia dysregulation. Here, we analyzed the connection between glycated hemoglobin (HbA1c) and the routine coagulation markers (D-dimers, prothrombin time (PT) and activated partial thromboplastin time (aPTT)) in patients with de novo intracranial glioblastomas. Included in this study were 74 patients, operated on in three hospitals, Clinical Hospital Dubrava, Zagreb, Croatia; University Hospital Center Split, Split, Croatia and University Hospital de la Princesa, Madrid, Spain. We found a significant inverse correlation between HbA1c and aPTT (ρ=-0.379; P=0.0009). We also found a significant inverse correlation between Ki67 immunoreactivity and aPTT (ρ=-0.211; P=0.0082). No connection was found between HbA1c and D-dimers or PT. Our results suggest that hyperglycemic patients, with a more proliferative glioblastoma, could in fact have their coagulation profile significantly disrupted, primarily through the intrinsic coagulation pathway. Such findings could have great clinical importance. Further research in this area could help elucidate the vicious connection between glioblastomas and coagulation, and help combat the deadly disease.
To assess the diagnostic value of neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) in lung cancer (LC). We compared the ratios between healthy participants and all LC ...patients, as well patients with different pathohistological LC subtypes.
We retrieved the data on neutrophil, lymphocyte, and platelet levels in 449 patients with different pathohistological LC subtypes (non-small cell LC, small-cell LC, atypical or metastatic LC, neuroendocrine, and sarcomatoid carcinoma) and 47 healthy controls. NLR and PLR were calculated by dividing the absolute number of neutrophils or platelets with the absolute number of lymphocytes.
There were significant differences in both NLR and PLR (P<0.001) between all LC patients and the control group, but there were no differences between patients with different LC subtypes. Reciever operating characteristics analysis for NLR showed the optimal cut-off value of 2.71, with a sensitivity of 77.05% and specificity of 87.23%. The optimal cut-off value for PLR was 182.31, with a sensitivity of 51.09% and specificity of 91.49%.
The results showed that the NLR and PLR may have added value in the early diagnosis of LC, but further research is needed to confirm these results.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
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