A single amino acid substitution in MdLAZY1A dominantly impairs shoot gravitropism in Malus.

Plant architecture is 1 of the most important factors that determines crop yield potential and productivity. In apple (Malus domestica), genetic improvement of tree architecture has been challenging due to a long juvenile phase and growth as complex trees composed of a distinct scion and a rootstock. To better understand the genetic control of apple tree architecture, the dominant weeping growth phenotype was investigated. We report the identification of MdLAZY1A (MD13G1122400) as the genetic determinant underpinning the Weeping (W) locus that largely controls weeping growth in Malus. MdLAZY1A is 1 of the 4 paralogs in apple that are most closely related to AtLAZY1 involved in gravitropism in Arabidopsis (Arabidopsis thaliana). The weeping allele (MdLAZY1A-W) contains a single nucleotide mutation c.584T>C that leads to a leucine to proline (L195P) substitution within a predicted transmembrane domain that colocalizes with Region III, 1 of the 5 conserved regions in LAZY1-like proteins. Subcellular localization revealed that MdLAZY1A localizes to the plasma membrane and nucleus in plant cells. Overexpressing the weeping allele in apple cultivar Royal Gala (RG) with standard growth habit impaired its gravitropic response and altered the growth to weeping-like. Suppressing the standard allele (MdLAZY1A-S) by RNA interference (RNAi) in RG similarly changed the branch growth direction to downward. Overall, the L195P mutation in MdLAZY1A is genetically causal for weeping growth, underscoring not only the crucial roles of residue L195 and Region III in MdLAZY1A-mediated gravitropic response but also a potential DNA base editing target for tree architecture improvement in Malus and other crops.

SnRK1 kinase-mediated phosphorylation of transcription factor bZIP39 regulates sorbitol metabolism in apple.

Sorbitol is a major photosynthate produced in leaves and transported through the phloem of apple (Malus domestica) and other tree fruits in Rosaceae. Sorbitol stimulates its own metabolism, but the underlying molecular mechanism remains unknown. Here, we show that sucrose nonfermenting 1 (SNF1)-related protein kinase 1 (SnRK1) is involved in regulating the sorbitol-responsive expression of both SORBITOL DEHYDROGENASE 1 (SDH1) and ALDOSE-6-PHOSPHATE REDUCTASE (A6PR), encoding 2 key enzymes in sorbitol metabolism. SnRK1 expression is increased by feeding of exogenous sorbitol but decreased by sucrose. SnRK1 interacts with and phosphorylates the basic leucine zipper (bZIP) transcription factor bZIP39. bZIP39 binds to the promoters of both SDH1 and A6PR and activates their expression. Overexpression of SnRK1 in 'Royal Gala' apple increases its protein level and activity, upregulating transcript levels of both SDH1 and A6PR without altering the expression of bZIP39. Of all the sugars tested, sorbitol is the only 1 that stimulates SDH1 and A6PR expression, and this stimulation is blocked by RNA interference (RNAi)-induced repression of either SnRK1 or bZIP39. These findings reveal that sorbitol acts as a signal regulating its own metabolism via SnRK1-mediated phosphorylation of bZIP39, which integrates sorbitol signaling into the SnRK1-mediated sugar signaling network to modulate plant carbohydrate metabolism.

Anthocyanin Accumulation Provides Protection against High Light Stress While Reducing Photosynthesis in Apple Leaves.

The photoprotective role of anthocyanin remains controversial. In this study, we explored the effects of anthocyanin on photosynthesis and photoprotection using transgenic 'Galaxy Gala' apple plants overexpressing MdMYB10 under high light stress. The overexpression of MdMYB10 dramatically enhanced leaf anthocyanin accumulation, allowing more visible light to be absorbed, particularly in the green region. However, through post-transcriptional regulation, anthocyanin accumulation lowered leaf photosynthesis in both photochemical reaction and CO2 fixation capacities. Anthocyanin accumulation also led to a decreased de-epoxidation state of the xanthophyll cycle and antioxidant capacities, but this is most likely a response to the light-shielding effect of anthocyanin, as indicated by a higher chlorophyll concentration and lower chlorophyll a/b ratio. Under laboratory conditions when detached leaves lost carbon fixation capacity due to the limitation of CO2 supply, the photoinhibition of detached transgenic red leaves was less severe under strong white, green, or blue light, but it became more severe in response to strong red light compared with that of the wild type. In field conditions when photosynthesis was performed normally in both green and transgenic red leaves, the degree of photoinhibition was comparable between transgenic red leaves and wild type leaves, but it was less severe in transgenic young shoot bark compared with the wild type. Taken together, these data show that anthocyanin protects plants from high light stress by absorbing excessive visible light despite reducing photosynthesis.

Apple ALMT9 Requires a Conserved C-Terminal Domain for Malate Transport Underlying Fruit Acidity.

Malate accumulation in the vacuole largely determines apple (Malus domestica) fruit acidity, and low fruit acidity is strongly associated with truncation of Ma1, an ortholog of ALUMINUM-ACTIVATED MALATE TRANSPORTER9 (ALMT9) in Arabidopsis (Arabidopsis thaliana). A mutation at base 1,455 in the open reading frame of Ma1 leads to a premature stop codon that truncates the protein by 84 amino acids at its C-terminal end. Here, we report that both the full-length protein, Ma1, and its naturally occurring truncated protein, ma1, localize to the tonoplast; when expressed in Xenopus laevis oocytes and Nicotiana benthamiana cells, Ma1 mediates a malate-dependent inward-rectifying current, whereas the ma1-mediated transmembrane current is much weaker, indicating that ma1 has significantly lower malate transport activity than Ma1. RNA interference suppression of Ma1 expression in 'McIntosh' apple leaves, 'Empire' apple fruit, and 'Orin' apple calli results in a significant decrease in malate level. Genotyping and phenotyping of 186 apple accessions from a diverse genetic background of 17 Malus species combined with the functional analyses described above indicate that Ma1 plays a key role in determining fruit acidity and that the truncation of Ma1 to ma1 is genetically responsible for low fruit acidity in apple. Furthermore, we identified a C-terminal domain conserved in all tonoplast-localized ALMTs essential for Ma1 function; protein truncations into this conserved domain significantly lower Ma1 transport activity. We conclude that the truncation of Ma1 to ma1 reduces its malate transport function by removing a conserved C-terminal domain, leading to low fruit acidity in apple.

Suppression of serum lipid transfer proteins involved in high-density lipoprotein cholesterol metabolism by intensive insulin therapy in the first year of type 1 diabetes mellitus: Prospective InLipoDiab1 study.

BACKGROUND AND AIMS: Cholesteryl ester transfer protein (CETP) and phospholipid transfer protein (PLTP) are crucial proteins in reverse cholesterol transport. There are insufficient data on regulating these proteins by insulin therapy in type 1 diabetes mellitus (T1DM). We aimed to assess prospectively the impact of insulin therapy initiation on transfer proteins serum levels in adults with newly diagnosed T1DM. METHODS AND RESULTS: 57 adults with newly diagnosed T1DM were enrolled in the InLipoDiab1 Study. All participants were treated with subcutaneous insulin in the model of intensive insulin therapy since the diagnosis of diabetes. Serum PLTP and CETP concentrations were measured at diagnosis, after three weeks, six months, and after one year of insulin treatment, using the immunoenzymatic method ELISA. A significant decrease in PLTP and CETP concentrations were demonstrated during twelve months of insulin therapy in newly diagnosed T1DM. The dynamics of changes in the level of these proteins varied depending on the occurrence of remission after a year of the disease. In the group without remission, a significant decrease in PLTP and CETP levels appeared after six months of follow-up. The remission group was characterized by a decrease in proteins concentration only after one year of treatment. In the non-remission group, significant negative correlations were found between the daily dose of insulin and levels of PLTP and CETP. CONCLUSION: Exogenous insulin is an inhibitor of lipid transfer proteins involved in high-density lipoprotein cholesterol metabolism in the first year of treatment.

[The IRCCS San Raffaele Hospital organizational model to assess the clinical documentation completeness and the appropriateness of hospitalization: the SVAD experience and the results of the three-year period 2018-2020.] / Modello di organizzazione dei controlli interni di completezza della documentazione clinica e di appropriatezza dei ricoveri all'IRCCS Ospedale San Raffaele: il Servizio Valutazione Appropriatezza della Documentazione clinica (SVAD) e i risultati del triennio 2018-2020.

According to the progressive increase in the number of medical records checked by the Agenzia di Tutela della Salute (ATS) of the Metropolitan City of Milan, the San Raffaele Hospital established a Unit supporting healthcare personnel in clinical documentation management. Therefore, in 2003 the Servizio Valutazione Appropriatezza della Documentazione clinica (SVAD), consisting of a nursing staff highly qualified in checking the appropriateness of clinical pathways, completeness and correctness of the clinical documentation and appropriate coding in the hospital discharge cards, was set up in the Health Directorate. Since 2018, the Service has seen an increase in resources, a re-organization and integration with the Operating Units. The aim of the article is to describe the introduction of a new organizational model and the results obtained, with reference to the quality self-control carried out for the ATS. In order to conduct a descriptive analysis of the trend, the sample data, required by the ATS in the three-year period 2018-2020, stratified by outcome and consequent percentage of reduction on the reimbursement of hospitalization, were considered. We observe an overall percentage increase in medical records without any reduction from 2018 to 2020, going from 84% to 94% (+ 10%); at the same time, there is a constant trend of medical records with complete curtailment between 2018 and 2019, while there is a reduction between 2019 and 2020, going from 4% to 2% (-2%). The positive results demonstrate the essential role of SVAD and consolidate an alternative career for nursing staff.

HIPM Is a Susceptibility Gene of Malus spp.: Reduced Expression Reduces Susceptibility to Erwinia amylovora.

Fire blight, a devastating disease caused by the bacterium Erwinia amylovora, is a major threat to apple crop production. To improve our understanding of the fire blight disease and to identify potential strategies to control the pathogen, we studied the apple protein HIPM (for HrpN-interacting protein from Malus spp.), which has previously been identified as interacting with the E. amylovora effector protein HrpN. Transgenic apple plants were generated with reduced HIPM expression, using an RNA interference construct, and were subsequently analyzed for susceptibility to E. amylovora infection. Lines exhibiting a greater than 50% silencing of HIPM expression showed a significant decrease in susceptibility to E. amylovora infection. Indeed, a correlation between HIPM expression and E. amylovora infection was identified, demonstrating the crucial role of HIPM during fire blight disease progression. Furthermore, an apple oxygen-evolving enhancer-like protein (MdOEE) was identified via a yeast two-hybrid screen to interact with HIPM. This result was confirmed with bimolecular fluorescence complementation assays and leads to new hypotheses concerning the response mechanism of the plant to E. amylovora as well as the mechanism of infection of the bacterium. These results suggest that MdOEE and, particularly, HIPM are promising targets for further investigations toward the genetic improvement of apple.

Clinical usefulness of serum free light chains measurement in patients with multiple myeloma: comparative analysis of two different tests.

INTRODUCTION: There are two commercially available tests for measurement of serum free light chains (sFLC) in multiple myeloma (MM) patients - Freelite and N Latex FLC. The aim of this study was to perform an assessment and direct comparison of the usefulness of the methods in routine clinical practice. METHODS: 40 refractory/relapsed MM patients underwent routine disease activity assessment studies, along with sFLC analysis using both assays. Correlation and concordance between the tests and sensitivity of studied methods of sFLC assessment were established. Special attention was focused on sFLC results in patients finally evaluated after completing the treatment. RESULTS: A weak correlation for the measurement of both κ [Passing-Bablok slope (PB) = 0.7681] and λ chains [(PB) = 1.542] was found. Using Bland-Altman plots, a bias of 0.0467 (κ) and -0.2133 (λ) between the measurements was documented. The concordance coefficient equaled 0.87 for κ, 0.62 for λ and 0.52 for κ/λ ratio. Ten patients had an abnormal Freelite assay κ/λ ratio and normal N Latex FLC κ/λ ratio. Three of these patients had negative serum protein electrophoresis results and fulfilled diagnostic criteria of stringent complete remission (sCR) according to N Latex FLC (but not according to Freelite). When the κ/λ ratio obtained by both methods was compared to patients' serum/urine protein electrophoresis and immunofixation results, sensitivity of Freelite and N Latex FLC was established to be 62.5% and 41%, respectively. CONCLUSIONS: There was no strong correlation or concordance between the two assays, and the sensitivity in terms of sFLC detection was different. This may cause problems when diagnosis of sCR is considered.

Bone Metabolism and the c.-223C > T Polymorphism in the 5'UTR Region of the Osteoprotegerin Gene in Patients with Inflammatory Bowel Disease.

Osteoporosis is more frequent in inflammatory bowel disease (IBD) patients. A reduction in bone mineral mass in these individuals is caused not only by inflammatory processes in the bowel, because osteoporosis occurs already in very young IBD patients and in newly diagnosed individuals who have not yet undergone any pharmacological treatment. One of individual determinants of the bone turnover parameters is osteoprotegerin (OPG) encoded by the TNFRSF11B gene. The c.-223C > T polymorphism in this gene has been extensively studied in post-menopausal osteoporosis patients. However, no such studies exist for osteoporosis related to IBD. The aim of our study was to determine whether the c.-223C > T (rs2073617) polymorphism in the 5'UTR region of the gene encoding osteoprotegerin is a functional polymorphism which may change the gene expression and resulting OPG levels, and so be associated with osteopenia and osteoporosis, and impaired bone metabolism in Crohn's disease and ulcerative colitis patients. Our study included 198 IBD patients and 41 healthy controls. Lumbar spine and femoral neck bone mineral density, T-score, Z-score as well as OPG, RANKL, vitamin D, calcium and interleukin 4 and 10 concentrations were determined for all study subjects. Genotyping of the TNFRSF11B polymorphic site was performed by restriction fragment length polymorphism technique. Statistical analyses were conducted using Statistica software. Odds ratios, 95 % confidence intervals, and P values were calculated using the HWE calculator. Our results did not allow determining an unequivocal association between the polymorphic variants of the TNFRSF11B 5'UTR region and a susceptibility to osteoporosis in IBD patients. We have shown, however, that the c.-223T allele was twice as more frequent in Crohn's disease (CD) patients than among controls (OR = 1.99, P value = 0.009). Interestingly, average osteoprotegerin levels in CD patients did not significantly differ from those in controls, whereas in ulcerative colitis patients, OPG levels were significantly lower. We have concluded that low OPG levels may be associated with osteoporosis in ulcerative colitis, but it is not correlated with the c.-223C > T polymorphism in the TNFRSF11B gene. In CD patients, in turn, we observed increased RANKL levels. Our observations confirm different pathogeneses of Crohn's disease and ulcerative colitis as well as different molecular backgrounds of osteoporosis associated with these two diseases.

[The analysis of the influence of short term physical effort on selected endothelial function parameters and blood vessels stiffness features among young and healthy men]. / Analiza wplywu krótkotrwalego wysilku fizycznego na wybrane parametry funkcji sródblonka naczyniowego oraz sztywnosc naczyn krwionosnych u mlodych i zdrowych mezczyzn.

UNLABELLED: Endothelium dysfunction is well established factor contributing to the development of atheroslerotic plaque. It is characterized by, among other, impaired vasodilatation and increased expression of adhesion molecules. The aim of the study was to estimate changes of serum selectin levels and blood vessels stiffness under the influence of short term physical effort in young healthy men characterized by various lifestyles. MATERIAL AND METHODS: The study was performed on 28 healthy men aged 22 to 34. The study involved personal interview, electrocardiography, treadmill exercise test, non-invasive endothelial function assessment (using PulseTrace PCA 2) and collecting blood samples for serum E-, L- and P-selectin measurement. The given population was divided into smoking and non-smoking groups, as well as into groups with different level of physical activity assessed according to the International Physical Activity Questionnaire. RESULTS: In regard to serum selectin levels under the influence of short term physical effort E-selectin concentration didn't change significantly in any group, P-selectin level was lower in non-smoking group (p < 0.01) and in group with vigorous physical activity (p < 0.005), L-selectin level decreased in non-smokers (p < 0.005) and in groups taking moderate (p < 0.05) and vigorous exercise (p < 0.05). Baseline SI (stiffness index) value differed significantly between smoking and nonsmoking groups (p < 0.005). SI value didn't change significantly under effort in any group. RI (reflection index) value in measurements made after physical effort was significantly lower in each of examined groups, but decrease was better marked among non-smokers (p < 0.005) than in smokers (p < 0.05). CONCLUSIONS: The study revealed that individuals who undertake physical activity regularly, benefit from each single physical effort, because of decrease in serum concentration of proinflammatory molecules such as L-selectin and P-selectin. Short term physical effort does not influence the level of selectins in smokers. Smokers are characterized by increased arterial stiffness compared to nonsmokers. Short term physical effort leads to peripheral vasodilatation, expressed by decreasing RI value, but vasodilatation effect does not appear in smokers. It seems that pulse contour analysis obtained by finger photopletysmography may be treated as method of endothelium function screening among healthy men with the presence of atherogenesis modifiable risk factors.

[Is there a relationship between pregnancy induced hypertension and obstructive sleep apnea? Case report]. / Czy istnieje zwiazek miedzy nadcisnieniem indukowanym ciaza a obturacyjnym bezdechem sennym? Opis przypadku.

The paper examines the case of a pregnant woman in a twin pregnancy complicated by pre-eclampsia and sleep disordered breathing. The patient was admitted to hospital with high blood pressure, proteinuria and increasing oedema. Laboratory tests revealed proteinuria and reduced total protein concentration in serum. The patient was diagnosed with mild pre-eclampsia. Due to the observed severe daytime sleepiness of the patient, loud snoring and pauses in breathing during sleep, polysomnography was performed. The test revealed a number of episodes of obstructive apnea and hypopnea. The AHI (apnea-hypopnea index) value was 82.1. A number of episodes of desaturation were observed. The lowest saturation had a value of 82%. When the patient was diagnosed with severe obstructive sleep apnea, treatment with CPAP (continuous positive airway pressure) was introduced. The use of CPAP allowed a reduction of the AHI to 1.2, and the blood pressure value normalised. The patient used CPAP between the 33rd and 35th weeks of gestation. At the 35th week of gestation, caesarean section was performed due to life-threatening symptoms of the first foetus in the CTG-recording. Two male infants were delivered in good condition. During the postpartum period, the patient discontinued the use of CPAP. Following this, an increase in AHI to 45.3 and an increase in blood pressure to a maximum of 180/100mmHg were observed. The patient was discharged from hospital in good general condition on the 7th day postpartum with recommendation for further diagnostic and therapy. The conclusion that may be drawn from the case is that sleep disorders adversely affect the health of the mother and the foetus. Also, the mood and quality of life of the pregnant woman deteriorate. It has been proven that there are many relationships between sleep and health. Sleep disorders and disorders of breathing during sleep contribute to the development of various diseases or they degrade the overall phenomena. A disease, on the other hand, additionally negatively affects the quality of sleep. Therefore, it is essential to treat not only the primary disease, but also the accompanying sleep disorders.

CFTR Modulators Therapy Efficacy in Reducing Cystic Fibrosis (CF) Exacerbation and Improving Selected Spirometry Parameters: A Real-Life Study in a Single-Centre Polish Population.

Background/Objectives: Cystic fibrosis is a genetically determined disease that significantly influences and shortens life. Treatment with CFTR modulators (CFTR-T) is a new hope for patients. It can change the predictive values of a poor prognosis (e.g., exacerbation rate and FEV1 value). The aim of the study was to analyse exacerbation incidence and spirometry data before and after one year (+/- 2 weeks) of CFTR-T in 85 CF patients at the CF Centre in Poznan. To our knowledge, this is the first analysis of CFTR-T efficiency in the Central-Eastern Europe population. Methods: We retrospectively analysed the spirometry and exacerbation data of 85 CF adult patients (both men and women), who in the middle of 2022 began treatment with CFTR modulators. Results: The one-year ratio of hospitalisation caused by severe exacerbations lowered from 1.25 to 0.21 per patient per year. We also saw a 66% decline in ambulatory exacerbations. The median FEV1% increased by 9.60% in absolute values and by 460 mL. Even in the group with very severe obstruction (FEV1 < 35%), there was an increase in median FEV1% of 5.9 in absolute values. We also proved the increase in FVC% (median 17.10% in absolute value and 600 mL) in the study group. Conclusions: After one year of treatment, an impressive improvement was observed in two important predictive values of poor prognosis: exacerbation rate and FEV1 values. Further observation is needed to determine how long the improvement will be present and its influence on quality of life and life expectancy.

Genetic variants of MTHFR gene in relation to folic acid levels and bone mineral density in Polish patients with inflammatory bowel disease.

Lower bone mineral density (BMD) constitutes a common issue in inflammatory bowel disease (IBD). Studies often explore the association between BMD and folic acid level. The presented study aimed to evaluate the impact of MTHFR gene polymorphism and folic acid levels on BMD in patients with IBDs: Crohn's disease (CD) and ulcerative colitis (UC). The study group comprised IBD patients and a healthy control group. BMD, T-score, and Z-score of the lumbar spine (L1-L4) and femoral neck (FN) were assessed using dual-energy X-ray absorptiometry. Folic acid level was determined using direct chemiluminescence, and the MTHFR 677C > T (rs1801133) and 1298A > C (rs1801131) genotyping were performed by HRMA. Our study found no significant differences in the folic acid levels between the groups. Patients with CD and UC presented a lower BMD, T-score, and Z-score of the FN and L1-L4 than the CG. UC patients who were homozygotes AA in loci c.1298A>C presented lower than controls lumbar spine L1-L4 BMD and T-score values. Regarding MTHFR 677 polymorphism, we found that IBD patients carrying CC genotype demonstrated lower than controls femoral neck Z-score, lumbar spine L1-L4 BMD, T-score and Z-score. MTHFR polymorphisms were found to have no impact on folic acid concentrations. IBD patients presented a higher risk of low BMD than the healthy controls, regardless of MTHFR 677 and 1298 genotypes. However, MTHFR polymorphism may influence on bone in IBD patients. Nevertheless, it appears essential to conduct further studies.

Blood antioxidant status, dysglycemia and obstructive sleep apnea.

Obstructive sleep apnea (OSA) patients present increased cardiovascular morbidity and mortality. Oxidative stress is involved in OSA and cardiovascular pathology. The aim of the study was to assess oxidative stress markers in the blood of OSA males during oral glucose tolerance test (OGTT). The study involved OSA-suspected obese males (BMI ≥ 25 kg/m(2)) aged 35-64, with no acute or chronic disorders, appointed for polysomnography to diagnose OSA (AHI ≥ 5). The results of OGTT allowed to select prediabetic (Pre) subjects and normal glucose tolerance (N), excluding newly diagnosed diabetes. Blood was collected at 0 min (fasting) and 120 min of the test. Plasma glucose, total antioxidant status (TAS), thiobarbituric acid-reacting substances (TBARS), and activity of superoxide dismutase-1 (SOD) in erythrocytes, were determined at the two time points and the difference (D) between the 120 and 0 min time points was calculated for either oxidative stress variable (D-TAS, D-SOD and D-TBARS). Fasting serum insulin and lipids also were measured fasting. There were four groups of subjects, each consisting of 22 individuals N-OSA-neg(ative), N-OSA-pos(itive), Pre-OSA-neg and Pre-OSA-pos. The N-OSA-pos and Pre-OSA-pos subjects demonstrated decreased SOD-0 compared with OSA-negative groups. In N-OSA-neg and N-OSA-pos groups, the positive differences D-SOD and D-TAS were observed, while Pre-OSA subjects presented negative differences. In conclusion, prediabetic OSA patients may consume blood antioxidant factors to counter the effects of oxidative stress, more than individuals with normal glucose tolerance.

The Effect of 75 Grams of Glucose during OGTT on Plasma Markers of Lipid and Lipoprotein Peroxidation, Oxidized LDL and Thiobarbituric Acid Reactive Substances, in People with Increased Body Mass.

Obesity, currently defined as a disease, is associated with a number of metabolic disorders, and oxidative stress is discussed as the link between them. The aim of this study was to analyze the plasma markers reflecting oxidative modification of lipids and lipoproteins, oxidized LDL (oxLDL) and thiobarbituric acid reactive substances (TBARS), under the influence of the 75 g of oral glucose during oral glucose tolerance test (OGTT), in patients with increased body mass. One hundred twenty individuals of both genders (46 women and 74 men) aged 26 to 75 years with increased body mass (BMI > 25 kg/m2) were recruited for the study. OGTT was performed in each of the qualified persons, and glycemia, insulinemia, and concentrations of oxLDL and TBARS were measured fasting and at 120 min of OGTT. The homeostasis model assessment of insulin resistance (HOMA-IR) was used to assess the degree of insulin resistance (IR). In order to assess the changes of the investigated parameters under the influence of 75 g glucose, the index ROGTT = [120']/[0'] was calculated to obtain oxLDL-ROGTT and TBARS-ROGTT. The statistical analysis was performed in the entire study population and subsequent groups from H1 to H4, defined by HOMA-IR quartiles. In the entire study population and the subgroups, oxidative stress markers changed during OGTT. From H1 to H4 group, increasing oxLDL and TBARS were observed both in the fasting state and at 120 min of OGTT, and the oxLDL-ROGTT index decreased from the H2 to the H4 group. The intensification of IR in people with increased body mass may predispose them to enhanced oxidative modification of lipoproteins. Individual reduction in the concentration of oxLDL during OGTT, in reference to fasting value (decreased oxLDL-ROGTT), suggests increased uptake of modified lipoproteins by scavenger receptor-presenting cells or increased migration to the vascular wall.

Time Perspective as a Mediator of Depressive Symptoms in Patients with Polycystic Ovary Syndrome.

BACKGROUND: Polycystic ovary syndrome (PCOS) is a chronic endocrinopathy characterized by oligo- or anovulation, clinical and/or biochemical markers of hyperandrogenism, and polycystic ovaries, and it is associated with an increased prevalence of depression. Research conducted on psychiatric patients has shown correlations between depression and decreased cognitive function. The aim of this study was to examine the possible mediation of the time perspective (TP) in the development of depressive symptoms in patients with PCOS. METHODS: A study was conducted on 83 patients with PCOS and 65 healthy women. Standardized questionnaires were used to assess depressive symptoms (Beck Depression Inventory-BDI-II) and time perspective (Zimbardo Time Perspective Inventory-ZTPI). RESULTS: Our study revealed an indirect influence of depressive symptoms on PCOS through the positive future time perspective. In the logistic regression model, which included depression and a given time perspective as predictors of PCOS, only the future TP (ß = -0.004, p < 0.003, OR = 1.004, 95% CI [1.001, 1.008]) was significantly independently related to the occurrence of PCOS. CONCLUSIONS: Our result is another argument for the role of psychoeducation and appropriate communication with a patient from the risk group in a way that builds hope and allows to regain influence on life situation.

[The influence of cigarette smoking and neoplastic disease on plasma total antioxidant status (TAS)]. / Wplyw palenia tytoniu i choroby nowotworowej na calkowity stan antyoksydacyjny osocza (TAS).

UNLABELLED: The aim of the study was the evaluation of the plasma total antioxidant status (TAS) in persons with the neoplastic disease: colorectal or breast cancer in the relation to the smoking habit. MATERIAL AND METHODS: the cancer group: 72 persons with the colorectal (n=30) or breast cancer (n=42), the control group: 62 healthy persons. In cancer group 16 persons were smokers, in the control group also 16 persons were smokers. The plasma total antioxidant status was measured by colorimetric method with the use of Randox Total Antioxidant Status (TAS) kit. RESULTS: in the control group TAS concentration was significantly lower in smokers than in nonsmokers whereas in the cancer group the difference was nonsignificant. TAS level in the cancer group was decreased when compared to the controls. TAS concentration was lower in the nonsmoking cancer patients than in the nonsmoking controls. TAS level in nonsmoking cancer subgroup was similar to that in the smoking controls. CONCLUSION: cigarette smoking in healthy persons and the neoplastic disease in nonsmokers results in the decreased capacity of the plasma nonenzymatic antioxidants to the similar degree.

[The impact of tobacco smoking on the selected risk factors for cardiovascular disease in students of Poznan University of Medical Sciences]. / Wplyw palenia tytoniu na wybrane czynniki ryzyka chorób sercowo-naczyniowych u studentów Uniwersytetu Medycznego w Poznaniu.

UNLABELLED: The aim of this study was to assess the impact of tobacco smoking on the selected risk factors for cardiovascular disease in young adults. MATERIAL AND METHODS: we analyzed the results of cardiovascular screening management on medical students aged 20-24. The study was conducted on 438 persons, 350 non-smokers (N) and 88 smokers (S) declared as healthy individuals: 274 females (F), 230 non-smokers (FN) and 44 smokers (FS), and 164 males (M), 120 non-smokers (MN) and 44 smokers (MS). The subjects were measured waist, body mass index (BMI), systolic (SBP) and diastolic (DBP) blood pressure, They were assessed fasting capillary blood tests: glucose, total cholesterol (T-C), triacylglycerols (TAG), HDL cholesterol (HDL-C), LDL cholesterol (LDL-C), nonHDL-C, T-C/HDL-C ratio, using analyzer Reflotron Plus (Roche Diagnostics, USA). The results collected in groups of females (F), males (M), non-smokers (N) and smokers (S) were calculated using Statistica 10 version. RESULTS: Females and males did not differ with their age, BMI, TAG, LDL-C and nonHDL-C, but males presented physiological higher waist and T-C/HDL-C ratio, decreased HDL-C, and higher SBP and DBP, although within references. N and S females did not differ with waist, BMI, SBP and DBP, similar to N and S males. Smokers (S) presented increased TAG, decreased HDL-C and higher waist, comparing with non-smokers (N) - without relation of TAG and HDL-C to either waist or BMI. FS group were found increased TAG and correlation TAG&BMI (R=0,45), as compared with FN group. MS group had higher TAG and lower HDL-C than MN group, and negative correlation TAG&HDL-C (R=-0,39). CONCLUSION: Tobacco smoking, an independent risk factor for cardiovascular disease, can modify plasma lipid profile in young adults to increase the risk more, especially in males.

Cyberbullying and its protective and risk factors among Polish adolescents.

BACKGROUND: Cyberbullying has recently attracted attention because of its increasing occurrence and serious consequences for victims. The purpose of the study was to examine the prevalence rates of cyberbullying and the association between cyberbullying and protective/risk factors (cognitive empathy, assertiveness, cooperation, pro-social behaviour, and social support) among Polish adolescents. PARTICIPANTS AND PROCEDURE: Participants (822 students, 448 girls and 374 boys, M = 12.97, SD = 1.02) completed a computer-based online questionnaire. RESULTS: The majority of respondents did not experience cyberbul-lying in the last six months, while a significant group still experienced cyberbullying regularly (28.1%). Engaging in cyberbullying appeared to be even less common: it was reported by 12.3% of respondents. Family and peer social support appeared to be the strongest protective factor against experiencing cyberbullying while assertiveness was a characteristic that makes a person more likely to engage in cyberbullying. CONCLUSIONS: The results of our study can serve as guidance for preventive interventions against cyberbullying.

Clinical significance of basic laboratory parameters in predicting the use of various methods of oxygen supplementation in COVID-19.

INTRODUCTION: The severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) infection resulted in significant worldwide morbidity and mortality. The aim of our study was to evaluate the results of laboratory tests performed on patients on admission to the hospital between groups of patients requiring and not requiring oxygen supplementation, and to find predictive laboratory indicators for the use of high-flow nasal oxygen therapy (HFNOT)/continuous positive airway pressure (CPAP)/bilevel positive airway pressure (BPAP). MATERIALS AND METHODS: We retrospectively analysed the data of consecutive patients hospitalised in the Pulmonology Department of the Temporary COVID Hospital in Poznan from February to May 2021. On admission to the department, the patients had a panel of laboratory blood tests. RESULTS: The study group consisted of 207 patients with a mean age of 59.2 ± 15.0 years of whom 179 (72%) were male. During hospitalisation, oxygen supplementation was required by 87% of patients. Patients requiring oxygen supplementation and/or the use of HFNOT/CPAP/BPAP had lower lymphocyte counts and higher levels of urea, C-reactive protein, D-dimer, troponin, glucose, lactate dehydrogenase (LDH) as well as higher white blood cell and neutrophil counts, The parameter that obtained the highest area under curve value in the receiver operator curve analysis for the necessary use of HFNOT/CPAP/BPAP or CPAP/BPAP was LDH activity. CONCLUSIONS: Among the basic parameters assessed on admission to the temporary hospital, LDH activity turned out to be the most useful for assessing the need for CPAP/BPAP active oxygen therapy. Other parameters that may be helpful for predicting the need for HFNOT/CPAP/BPAP are serum levels of urea, D-dimer and troponin.