Tissue factor pathway inhibitor-2 (TFPI-2)-an underappreciated partaker in cancer and metastasis.

The coagulation system is known to play an important role in cancer development and metastasis, but the precise mechanisms by which it does so remain incompletely understood. With this in mind, we provide an updated overview of the effects of TFPI-2, a protease inhibitor, on cancer development and metastasis. TFPI-2 interacts with the thrombin cascade and also employs other mechanisms to suppress cancer growth and dissemination, which include extracellular matrix stabilization, promotion of caspase-mediated cell apoptosis, inhibition of angiogenesis and transduction of intracellular signals. Down-regulation of TFPI-2 expression is well documented in numerous types of neoplasms, mainly via promoter methylation. However, the exact role of TFPI-2 in cancer progression and possible approaches to up-regulate TFPI-2 expression warrant further studies. Strategies to reactivate TFPI-2 may represent a promising direction for future anticancer studies and therapy development.

Proline Metabolism in WHO G4 Gliomas Is Altered as Compared to Unaffected Brain Tissue.

Proline metabolism has been identified as a significant player in several neoplasms, but knowledge of its role in gliomas is limited despite it providing a promising line of pursuit. Data on proline metabolism in the brain are somewhat historical. This study aims to investigate alterations of proline metabolism in gliomas of WHO grade 4 (GG4) in the context of the brain. A total of 20 pairs of samples were studied, consisting of excised tumor and unaffected brain tissue, obtained when partial brain resection was required to reach deep-seated lesions. Levels of proline oxidase/proline dehydrogenase (POX/PRODH), Δ1-pyrroline-5-carboxylate reductases (PYCR1/2/3), prolidase (PEPD), and metalloproteinases (MMP-2, MMP-9) were assessed, along with the concentration of proline and proline-related metabolites. In comparison to normal brain tissue, POX/PRODH expression in GG4 was found to be suppressed, while PYCR1 expression and activity of PEPD, MMP-2, and -9 were upregulated. The GG4 proline concentration was 358% higher. Hence, rewiring of the proline metabolism in GG4 was confirmed for the first time, with a low-POX/PRODH/high-PYCR profile. High PEPD and MMPs activity is in keeping with GG4-increased collagen turnover and local aggressiveness. Further studies on the mechanisms of the interplay between altered proline metabolism and the GG4 microenvironment are warranted.

The Complex Role of Thrombin in Cancer and Metastasis: Focus on Interactions with the Immune System.

Thrombin, a pleiotropic enzyme involved in coagulation, plays a crucial role in both procoagulant and anticoagulant pathways. Thrombin converts fibrinogen into fibrin, initiates platelet activation, and promotes clot formation. Thrombin also activates anticoagulant pathways, indirectly inhibiting factors involved in coagulation. Tissue factor triggers thrombin generation, and the overexpression of thrombin in various cancers suggests that it is involved in tumor growth, angiogenesis, and metastasis. Increased thrombin generation has been observed in cancer patients, especially those with metastases. Thrombin exerts its effects through protease-activated receptors (PARs), particularly PAR-1 and PAR-2, which are involved in cancer progression, angiogenesis, and immunological responses. Thrombin-mediated signaling promotes angiogenesis by activating endothelial cells and platelets, thereby releasing proangiogenic factors. These functions of thrombin are well recognized and have been widely described. However, in recent years, intriguing new findings concerning the association between thrombin activity and cancer development have come to light, which justifies a review of this research. In particular, there is evidence that thrombin-mediated events interact with the immune system, and may regulate its response to tumor growth. It is also worth reevaluating the impact of thrombin on thrombocytes in conjunction with its multifaceted influence on tumor progression. Understanding the role of thrombin/PAR-mediated signaling in cancer and immunological responses is crucial, particularly in the context of developing immunotherapies. In this systematic review, we focus on the impact of the thrombin-related immune system response on cancer progression.

Is depression the missing link between inflammatory mediators and cancer?

Patients with cancer are at greater risk of developing depression in comparison to the general population and this is associated with serious adverse effects, such as poorer quality of life, worse prognosis and higher mortality. Although the relationship between depression and cancer is now well established, a common underlying pathophysiological mechanism between the two conditions is yet to be elucidated. Existing theories of depression, based on monoamine neurotransmitter system dysfunction, are insufficient as explanations of the disorder. Recent advances have implicated neuroinflammatory mechanisms in the etiology of depression and it has been demonstrated that inflammation at a peripheral level may be mirrored centrally in astrocytes and microglia serving to promote chronic levels of inflammation in the brain. Three major routes to depression in cancer in which proinflammatory mediators are implicated, seem likely. Activation of the kynurenine pathway involving cytokines, increases tryptophan catabolism, resulting in diminished levels of serotonin which is widely acknowledged as being the hallmark of depression. It also results in neurotoxic effects on brain regions thought to be involved in the evolution of major depression. Proinflammatory mediators also play a crucial role in impairing regulatory glucocorticoid mediated feedback of the hypothalamic-pituitary-adrenal axis, which is activated by stress and considered to be involved in both depression and cancer. The third route is via the glutamatergic pathway, whereby glutamate excitotoxicity may lead to depression associated with cancer. A better understanding of the mechanisms underlying these dysregulated and other newly emerging pathways may provide a rationale for therapeutic targeting, serving to improve the care of cancer patients.

Proline Metabolism in Malignant Gliomas: A Systematic Literature Review.

BACKGROUND: Proline has attracted growing interest because of its diverse influence on tumor metabolism and the discovery of the regulatory mechanisms that appear to be involved. In contrast to general oncology, data on proline metabolism in central nervous system malignancies are limited. MATERIALS AND METHODS: We performed a systematic literature review of the MEDLINE and EMBASE databases according to PRISMA guidelines, searching for articles concerning proline metabolism in malignant glial tumors. From 815 search results, we identified 14 studies pertaining to this topic. RESULTS: The role of the proline cycle in maintaining redox balance in IDH-mutated gliomas has been convincingly demonstrated. Proline is involved in restoring levels of glutamate, the main glial excitatory neurotransmitter. Proline oxidase influences two major signaling pathways: p53 and NF- κB. In metabolomics studies, the metabolism of proline and its link to the urea cycle was found to be a prognostic factor for survival and a marker of malignancy. Data on the prolidase concentration in the serum of glioblastoma patients are contradictory. CONCLUSIONS: Despite a paucity of studies in the literature, the available data are interesting enough to encourage further research, especially in terms of extrapolating what we have learned of proline functions from other neoplasms to malignant gliomas.

Ozonation of Whole Blood Results in an Increased Release of Microparticles from Blood Cells.

Autohemotherapy with ozonated blood is used in the treatment of a broad spectrum of clinical disorders. Ozone demonstrates strong oxidizing properties and causes damage to cell membranes. The impact of whole-blood ozonation on the release of microparticles from blood and endothelial cells and the concentration of selected markers in the hemostatic system (APTT, PT, D-dimer, fibrinogen) were investigated. Venous blood, obtained from 19 healthy men, was split into four equal parts and treated with air, 15 µg/mL ozone, or 30 µg/mL ozone, or left untreated. The number and types of microparticles released were determined using flow cytometry on the basis of surface antigen expression: erythrocyte-derived microparticles (CD235+), platelet-derived microparticles (CD42+), leukocyte-derived microparticles (CD45+), and endothelial-derived microparticles (CD144+). The study is the first to demonstrate that ozone induces a statistically significant increase in the number of microparticles derived from blood and endothelial cells. Although statistically significant, the changes in some coagulation factors were somewhat mild and did not exceed normal values.

Heterogeneous Expression of Proangiogenic and Coagulation Proteins in Gliomas of Different Histopathological Grade.

Brain gliomas are characterized by remarkably intense invasive growth and the ability to create new blood vessels. Angiogenesis is a key process in the progression of these tumors. Coagulation and fibrinolysis factors play a role in promoting angiogenesis. The aim of the study was to evaluate the expression of proangiogenic proteins (VEGF and bFGF) and hemostatic proteins (TF, fibrinogen, fibrin, D-dimers) associated with neoplastic cells and vascular endothelial cells in brain gliomas of various degrees of malignancy. Immunohistochemical tests were performed using the ABC method with the use of mono- and polyclonal antibodies. The obtained results indicated that both neoplastic cells and vascular endothelial cells in gliomas of various degrees of malignancy are characterized by heterogeneous expression of proteins of the hemostatic system and angiogenesis markers. The strongest expression of proangiogenic factors and procoagulant factors was demonstrated in gliomas of higher-grade malignancy.

Inhibitors of immune checkpoints-PD-1, PD-L1, CTLA-4-new opportunities for cancer patients and a new challenge for internists and general practitioners.

The treatment of cancer patients with immune checkpoint inhibitors (ICI) (anti-CTLA-4, anti-PD-1, anti-PD-L1, combined therapy anti-PD-1/PD-L1 with anti-CTLA-4) has without doubt been a significant breakthrough in the field of oncology in recent years and constitutes a major step forward as a novel type of immunotherapy in the treatment of cancer. ICIs have contributed to a significant improvement in the outcome of treatment and prognosis of patients with different types of malignancy. With the expansion of the use of ICIs, it is expected that caregivers will face new challenges, namely, they will have to manage the adverse side effects associated with the use of these drugs. New treatment options pose new challenges not only for oncologists but also for specialists in other clinical fields, including general practitioners (GPs). They also endorse the need for taking a holistic approach to the patient, which is a principle widely recognized in oncology and especially relevant in the case of the expanding use of ICIs, which may give rise to a wide variety of organ complications resulting from treatment. Knowledge and awareness of the spectrum of immune-related adverse events (irAEs) will allow doctors to qualify patients for treatment more appropriately, prevent complications, correctly recognize, and ultimately treat them. Additionally, patients with more non-specific symptoms would be expected, in the first instance, to consult their general practitioners, as complications may appear even after the termination of treatment and do not always proceed in line with disease progression. Dealing with any iatrogenic complications, will not only be the remit of oncologists but because of the likelihood that specific organs may be affected, is likely to extend also to specialists in various fields of internal medicine. These specialists, e.g., endocrinologists, dermatologists, pulmonologists, and gastroenterologists, are likely to receive referrals for patients suffering from specific types of adverse events or will be asked to provide care in cases requiring hospitalization of patients with complications in their field of expertise. In view of these considerations, we believe that there is an urgent need for multidisciplinary teamwork in the treatment of cancer patients undergoing immunotherapy and suffering the consequent adverse reactions to treatment.

Imbalance in Coagulation/Fibrinolysis Inhibitors Resulting in Extravascular Thrombin Generation in Gliomas of Varying Levels of Malignancy.

Neoplastic processes are integrally related to disturbances in the mechanisms regulating hemostatic processes. Brain tumors, including gliomas, are neoplasms associated with a significantly increased risk of thromboembolic complications, affecting 20-30% of patients. As gliomas proliferate, they cause damage to the brain tissue and vascular structures, which leads to the release of procoagulant factors into the systemic circulation, and hence systemic activation of the blood coagulation system. Hypercoagulability in cancer patients may be, at least in part, a result of the inadequate activity of coagulation inhibitors. The aim of the study was to evaluate the expression of the inhibitors of the coagulation and fibrinolysis systems (tissue factor pathway inhibitor, TFPI; tissue factor pathway inhibitor-2 TFPI-2; protein C, PC; protein S, PS, thrombomodulin, TM; plasminogen activators inhibitor, PAI-1) in gliomas of varying degrees of malignancy. Immunohistochemical studies were performed on 40 gliomas, namely on 13 lower-grade (G2) gliomas (8 astrocytomas, 5 oligodendrogliomas) and 27 high-grade gliomas (G3-12 anaplastic astrocytomas, 4 anaplastic oligodendrogliomas; G4-11 glioblastomas). A strong expression of TFPI-2, PS, TM, PAI-1 was observed in lower-grade gliomas, while an intensive color immunohistochemical (IHC) reaction for the presence of TFPI antigens was detected in higher-grade gliomas. The presence of PC antigens was found in all gliomas. Prothrombin fragment 1+2 was observed in lower- and higher-grade gliomas reflecting local activation of blood coagulation. Differences in the expression of coagulation/fibrinolysis inhibitors in the tissues of gliomas with varying degrees of malignancy may be indicative of their altered role in gliomas, going beyond that of their functions in the hemostatic system.

Direct Oral Anticoagulants in Cancer Patients. Time for a Change in Paradigm.

Thrombosis is a more common occurrence in cancer patients compared to the general population and is one of the main causes of death in these patients. Low molecular weight heparin (LMWH) has been the recognized standard treatment for more than a decade, both in cancer-related thrombosis and in its prevention. Direct oral anticoagulants (DOACs) are a new option for anticoagulation therapy. Recently published results of large randomized clinical trials have confirmed that DOAC may be a reasonable alternative to LMWH in cancer patients. The following review summarizes the current evidence on the safety and efficacy of DOAC in the treatment and prevention of cancer-related thrombosis. It also draws attention to the limitations of this group of drugs, knowledge of which will facilitate the selection of optimal therapy.

It is not just the drugs that matter: the nocebo effect.

The role of psychological mechanisms in the treatment process cannot be underestimated, the well-known placebo effect unquestionably being a factor in treatment. However, there is also a dark side to the impact of mental processes on health/illness as exemplified by the nocebo effect. This phenomenon includes the emergence or exacerbation of negative symptoms associated with the therapy, but arising as a result of the patient's expectations, rather than being an actual complication of treatment. The exact biological mechanisms of this process are not known, but cholecystokinergic and dopaminergic systems, changes in the HPA axis, and the endogenous secretion of opioids are thought to be involved. The nocebo effect can affect a significant proportion of people undergoing treatment, including cancer patients, leading in some cases to the cessation of potentially effective therapy, because of adverse effects that are not actually part of the biological effect of treatment. In extreme cases, as a result of suggestions and expectations, a paradoxical effect, biologically opposite to the mechanism of the action of the drug, may occur. In addition, the nocebo effect may significantly interfere with the results of clinical trials, being the cause of a significant proportion of complications reported. Knowledge of the phenomenon is thus necessary in order to facilitate its minimalization and thus improve the quality of life of patients and the effectiveness of treatment.

Median nerve conduction impairment in patients with diabetes and its impact on patients' perception of health condition: a quantitative study.

INTRODUCTION: Impaired mobility and compromised manual dexterity leading to difficulties with the activities of daily living (ADL) are an inherent part of the clinical picture in diabetes. Hand function in diabetes is influenced by a variety of pathologies: the median nerve, the most important nerve of the hand, can suffer from metabolic disturbances, ischemia and/or entrapment neuropathies. The resulting deterioration in functional capacity is likely to have significant consequences for the ability to perform ADL, influencing adjustment to diabetes and affecting quality of life. The aim of the present study was to examine the influence of hand function as measured by median motor nerve conduction on quality of life, taking into account various aspects of functioning in patients with diabetes, including activities of daily living, psychological status and acceptance of illness. PATIENTS AND METHODS: Seventy one hospital patients with diabetes participated in the study. Electrophysiological recordings of conductance in the median nerve were obtained for both hands and the relationship between hand function and functional status (BI), depression and anxiety (HADS), adjustment to illness (AIS) and their effect on quality of life (SF-36v2 and QLI) was studied. RESULTS: Damage to the median nerve of the left hand was associated with significant differences in functioning in the physical, but not the mental component of the SF-36v2, p = 0.03 and in functional status (p = 0.006). QOL was associated with depression, patient age, acceptance of illness, functional ability and to a small, but significant extent with median nerve damage to the right hand on the measure of conduction velocities (R2 =0.726). CONCLUSIONS: Nerve conductance studies demonstrated a small, but significant effect of hand function on quality of life. Impairment of the median nerve in the left hand was associated with functional difficulties in the activities of daily living and a diminished quality of life in the area of physical functioning. No dependencies of this kind were found for the right hand, which may reflect the greater compensatory capacity of the right hand resulting from improved efficiency due to practice.

Quality assurance in gerontological and geriatric training programs: the European case.

Quality assurance (QA) in gerontological and geriatric education programs is regarded as essential to maintain standards, strengthen accountability, improve readability of qualifications, and facilitate professional mobility. In this article the authors present a summary of international developments in QA and elaborate four international trends, including the pros and cons of QA. Furthermore, the authors focus on accreditation and credit transfer opportunities in vocational and academic education programs for primary care practitioners, including nurses, home care workers, social workers, physiotherapists, and family doctors involved in the care of older people in nine European countries and highlight changes that have occurred over the last decade. Vocational education and professional training in elderly care at the basic and postgraduate specialization level remains extremely diversified, reflecting the lack of standardization for programs outside the higher education sector. The situation is ripe for the implementation of the European Qualifications Framework, which is intended to promote transparency, comparability and portability of qualifications at different levels and the introduction of a credit transfer system for vocational education to be established in 2012.

[Rehabilitation of patients following subarachnoid haemorrhage as a result of ruptured intracranial aneurysms]. / Rehabilitacja pacjentów po krwawieniu podpajeczynówkowym z peknietego tetniaka wewnatrzczaszkowego.

The aim of the present paper is to discuss how neuropsychological impairments affect the functioning of patients in the aftermath of aneurysmal SAH and to highlight the need for complex professional rehabilitation services for this group of patients. Following the acute stage of illness, when treatment efforts are focused on life-saving measures, a significant proportion of patients are left with long-term consequences of cerebral damage in the form of specific cognitive impairments or emotional changes. The resultant functional deficits require specialist treatment, but few patients have sufficient knowledge in this regard to allow them to seek help and the availability of specialist services is frequently restricted only to large centres of population. Patients and their families usually do not know where to turn in the face of a sudden, life-threatening illness, which changes their lives diametrically, still less, what kind of specialist help might be available to them. Bearing in mind the needs of patients and their families, there are but few centers offering cognitive therapy or other forms of psychotherapeutic intervention, that are funded under the auspices of the National Health Fund (NFZ). Furthermore, healthcare policies do not place high priority on employing adequately trained psychological therapists in neurosurgical or neurological departments, and the lack of effective cooperation between specialists from different disciplines places significant limitations on the effective rehabilitation of patients who have undergone SAH. In the following article we review the opportunities for effective rehabilitation in order to optimize the functioning of patients with brain damage following SAH.

[Use of "the Middlesex Elderly Assessment of Mental State" scale in the assessment of cognitive functioning in patients with aneurysmal subarachnoid haemorrhage]. / "The Middlesex Elderly Assessment of Mental State" w ocenie funkcjonowania poznawczego chorych po krwotoku podpajeczynówkowym z peknietego tetniaka mózgu w ostrym okresie choroby.

UNLABELLED: It is now well established that cognitive deficits are a frequent consequence of aneurysmal subarachnoid haemorrhage (SAH). The cognitive status in the acute phase of the illness may provide valuable prognostic information in relation to the effects of the proposed treatment and long-term functioning of the patient. A prerequisite for this task is the identification of instruments that might prove useful in the diagnosis of neuropsychological deficits in patients with SAH. For these purposes we used The Middlesex Elderly Assessment of Mental State (MEAMS) in order to assess the cognitive deficits consequent upon SAH. THE AIM OF THE STUDY: To assess the cognitive functioning of patients undergoing treatment for SAH of aneurysmal origin in the acute stage of the illness, using a modified form of the MEAMS. MATERIALS AND METHODS: 49 patients participated in the study, none of whom had a previous history of neurological or psychiatric illness. The age of the patients ranged between 23-70 years. 35 (71%) patients received surgical treatment (clipping of the aneurysm neck) and in 14 (29%) the aneurysm was embolised. The patients were assessed on two occasions: the first on admission to the Neurosurgery department following the SAH, and on the second, following treatment to secure the aneurysm. A modified version of the MEAMS in two parallel versions was used in the assessment. The results obtained were evaluated with reference to a control group. RESULTS: A range of cognitive impairments was identified with the aid of the MEAMS in patients undergoing treatment for aneurysmal SAH. These included deficits in visual and auditory memory, executive, perceptual and visuo-spatial functions together with the tendency to perseverate. In those patients who underwent surgery, deficits were observed in the following areas: disorientation in relation to self, time and place; perceptual, memory and visuo-spatial impairments. CONCLUSIONS: The results obtained indicate that the Middlesex Elderly Assessment of Mental State, in the form used in the present study appears to be a sensitive and useful instrument for the screening of cognitive impairments in patients following SAH, in the acute stages of the illness.

A multi-centre European study of factors affecting the discharge destination of older people admitted to hospital: analysis of in-hospital data from the ACMEplus project.

OBJECTIVES: to examine the relationship between seven predictor variables (recorded on Day 3 of hospital admission) and discharge destination in non-elective medical patients aged 65+ years. DESIGN: prospective cohort. SETTING: eight centres in six European countries. PREDICTOR VARIABLES: age, gender, living alone, physical function (three categories based on Barthel Index), cognition (Katzman's orientation-memory-concentration test), main body system affected (based on International Classification of Diseases), number of geriatric giants (GGs) involved in the referral (a GG being a problem with falling, mobility, continence or cognition). MAIN OUTCOME MEASURES: discharge destination (by Day 90) in three categories: 'HOMESAME' (return to previous residence), 'INSTIN90' (discharge to alternative residence or still in hospital at 90 days), 'DEADINHO' (death in hospital), RESULTS: in 1,626 patients, discharge destination was HOMESAME in 84.7%, DEADINHO in 8.9% and INSTIN90 in 6.4%. Mean duration of stay was 17.7 days, median 12. Univariate analyses showed a statistically significant relationship between all seven predictor variables and discharge destination. Physical function was the best single predictor with a seven-fold difference in adverse outcome rates between the best and worst categories. On multiple logistic regression, significant predictor variables were as follows. (i) For DEADINHO: physical function, cognition, gender; (ii) for INSTIN90: physical function, living alone, GGs, age, gender. Multiple linear regression identified physical function, GGs and living alone as predictors of loge length of stay. CONCLUSION: case-mix systems to compare risk-adjusted hospital outcome in older medical patients need to incorporate information about physical function, cognition and presenting problems in addition to diagnosis.