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Mateo Bevanda, Nela Kelam, Anita Racetin, N. Filipović, Daniela Bevanda Glibo, Ivana Bevanda, Katarina Vukojević

Background and Objectives: Colorectal cancer (CRC) is the most frequently diagnosed malignant disease of the gastrointestinal system, and new diagnostic and prognostic markers are needed to elucidate the complete tumor profile. Materials and Methods: We used CRC tumor tissues (Dukes’ A-D) and adjacent noncancerous tissues of 43 patients. Immunohistochemistry was used to examine the expression of phosphodiesterase 4B (PDE4B), phosphodiesterase 4D (PDE4D), and secreted frizzled related protein 5 (SFRP5) markers. We also analyzed the expression levels of PDE4B, PDE4D, and SFRP5 in CRC tissues compared to control tissues using RNA-sequencing data from the UCSC Xena browser. Results: In CRC stages, the distribution of PDE4B-positive cells varied, with differing percentages between epithelium and lamina propria. Statistically significant differences were found in the number of PDE4B-positive epithelial cells between healthy controls and all CRC stages, as well as between different CRC stages. Similarly, significant differences were observed in the number of PDE4B-positive cells in the lamina propria between healthy controls and all CRC stages, as well as between different CRC stages. CRC stage Dukes’ C exhibited a significantly higher number of PDE4B-positive cells in the lamina propria compared to CRC stage Dukes’ B. Significant differences were noted in the number of PDE4D-positive epithelial cells between healthy controls and CRC stages Dukes’ A, B, and D, as well as between CRC stage Dukes’ C and stages A, B, and D. CRC stage Dukes’ A had significantly more PDE4D-positive cells in the lamina propria compared to stage D. Significant differences were also observed in the number of SFRP5-positive cells in the lamina propria between healthy controls and all CRC stages, as well as between CRC stages Dukes’ A and D. While the expression of PDE4D varied across CRC stages, the expression of SFRP5 remained consistently strong in both epithelium and lamina propria, with significant differences noted mainly in the lamina propria. The expression levels of PDE4B, PDE4D, and SFRP5 reveal significant differences in the expression of these genes between CRC patients and healthy controls, with notable implications for patient prognosis. Namely, our results demonstrate that PDE4B, PDE4D, and SFRP5 are significantly under-expressed in CRC tissues compared to control tissues. The Kaplan–Meier survival analysis and the log-rank (Mantel–Cox) test revealed distinct prognostic implications where patients with lower expression levels of SFRP5 exhibited significantly longer overall survival. The data align with our immunohistochemical results and might suggest a potential tumor-suppressive role for these genes in CRC. Conclusions: Considering significantly lower gene expression, aligned with our immunohistochemical data in tumor tissue in comparison to the control tissue, as well as the significantly poorer survival rate in the case of its higher expression, we can hypothesize that SFRP5 is the most promising biomarker for CRC out of the observed proteins. These findings suggest alterations in PDE4B, PDE4D, and SFRP5 expression during CRC progression, as well as between different stages of CRC, with potential implications for understanding the molecular mechanisms involved in CRC development and progression.

Z. Pogorelić, Karlo Poljak, M. Jukić, Katarina Vukojević

Background: The aim of this study was to investigate treatment outcomes in adolescents who underwent laparoscopic surgery with an ultrasonic scalpel for symptomatic varicocele compared with adolescents who underwent surgery with a polymer clip. Methods: A total of 270 adolescents with a median age of 16 (interquartile range, IQR 13–17) years were included in the study. Taking into account the laparoscopic varicocelectomy technique used, the patients were divided into two groups. In the first group (n = 151), a polymer clip was used, while in the second group (n = 119), an ultrasonic scalpel was used to resect the spermatic vessels. The primary outcome measure was the effect of the laparoscopic technique used on treatment outcomes (postoperative complications and recurrence rates). Secondary outcomes were the duration of surgery and anesthesia and the length of hospital stay. Results: The duration of the surgical procedure (12 min (IQR 11, 15) versus 15 min (12, 19), p = 0.029) and anesthesia (21.5 min (16, 29.5) versus 28 min (23, 34), p = 0.003) was shorter in the group of adolescents in whom laparoscopic varicocelectomy was performed with an ultrasonic scalpel than in the group in which a polymer clip was used. No statistically significant difference was found between the groups studied in terms of length of hospital stay, recurrence rate (p >0.999), and complications (p = 0.703). There were no cases of testicular atrophy in either group. In the group of patients who underwent laparoscopic varicocelectomy with an ultrasonic scalpel, a slightly higher incidence of hydroceles was found (n = 4, 3.4%) than in the group in which a polymer clip was used (n = 2, 1.3%) (p = 0.410). At six-month follow-up, it was found that the majority of patients showed moderate or significant improvement in the spermogram after laparoscopic varicocelectomy (n = 85, 89.5%). In addition, the subjective discomfort or pain disappeared in the majority of patients (n = 71, 93.4%). The testicular volume increased significantly in 132 adolescents (89.8%). Conclusions: Laparoscopic varicocelectomy with a polymer clip or ultrasonic scalpel is safe and effective in adolescents with symptomatic varicocele. Treatment outcomes after laparoscopic varicocelectomy are the same regardless of whether a polymer clip or an ultrasonic scalpel is used to resect the spermatic vessels. The use of an ultrasonic scalpel for resection of the spermatic vessels shortens the overall duration of surgery and anesthesia.

Marko Kolaković, Saša Petković, Tin Horvatinović

The expanding research on team emergent states explains many facets of team dynamics in an entrepreneurial context. However, the interactions between team emergent states are still unknown. Detached from team emergent states, studies on student entrepreneurship have disclosed findings clustered around students' entrepreneurial intentions while neglecting the issue of persistence with a developed business idea. This study contributes to the literature by proposing an intersection between team emergent states and student entrepreneurial education research via a model where transactive memory systems mediate the effect of team efficacy on team persistence. The model is tested on a sample of student teams using a partial least‐square structural equation modelling approach. The findings support the proposed indirect effect. The study offers theoretical implications for team emergent states and policy implications for entrepreneurial education.

Vladimir Turuntaš, Silvio de Luka, Jasna L. Ristić-Djurovic, S. Ćirković, Drago M. Djordjevich, Sinisa Ristic, Nenad Lalović, Veljko Marić et al.

In contrast to electromagnetic fields, static magnetic fields (SMFs) have not been extensively studied in terms of their potential health consequences. Although upward- and downward-oriented magnetic poles may cause various biological effects, only the pole with the upward orientation has been mainly investigated. Considering that the interaction of antigen-presenting cells (APCs) and T lymphocytes is crucial to trigger an immune response, we assessed the effect of long-term exposure of human T lymphocytes and dendritic cells (DCs) to moderate strength SMFs of different orientations focusing on the cytokine profile of activated T cells. Cultures of allogenic T lymphocytes and DCs (immature and matured by TLR3 and TLR7 agonists) were continuously exposed to four SMFs. The intensity of the applied field was 1 militesla (mT) or 56 mT of the upward- and downward-oriented pole of the SMF. Cell culture supernatants were assayed for IFN-γ, IL-4, IL-17, TNF-α, TNF-β, IL-1 β, IL-6, IL-8, and IL-10 by ELISA or flow cytometry. The upward-oriented 56 mT SMF significantly increased the release of IFN-γ and TNF-β (both p < 0.05) in the cell culture supernatants of T cells and immature DCs. In contrast, the same cultures exposed to the upward-oriented 1 mT SMF showed significantly elevated levels of IL-17 (p < 0.05). The levels of IL-4, TNF-α, IL-1 β, IL-6, IL-8, and IL-10 were not affected by the upward-oriented SMF. The downward-oriented 56 mT SMF increased TNF-α release when T cells were stimulated with mature DCs. The production of other cytokines was unchanged by the downward-oriented SMF. These findings demonstrate for the first time different in vitro biological effects of upward- and downward-oriented static magnetic fields on the cytokine production of T cells activated by DCs, helping to better understand SMF effects on the immune system and suggesting that the selective SMF effect on the immune response could have potential therapeutic effects in different immune-mediated disorders.

Ashma Banu Kather Mohideen, Vimala Jayakumar, Nasreen Kausar, Željko Stević

In this manuscript, we delve into the realm of lattice ordered complex linear diophantine fuzzy soft set, which constitutes an invaluable extension to the existing Fuzzy set theories. Within this exploration, we investigate basic operations such as \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} $\oplus$\end{document}⊕ and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} $\otimes$\end{document}⊗, together with their properties and theorems. This manuscript is more amenable in two ways, i.e., it enables real-life problems involving parametrization tool and applications with an existing order between the components of the parameter set based on the preference in the complex frame of reference. Adaptive cruise control (ACC) is a system designed for maintaining distance between two vehicles and to sustain a manually provided input speed. The purpose of cars with ACC is to avoid a collision that frequently happens nowadays, thereby improving road safety regulations amidst rising collision rates. The fundamental aim of this manuscript is to prefer an applicable car with ACC together with its latest model by defining a peculiar postulation of lattice ordered complex linear diophantine fuzzy soft set \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} $\rm ( \widehat{LOCLDFSS} )$\end{document}(LOCLDFSS^). Emphasizing real-life applicability, we illustrate the effectiveness and validity of our suggested methodology in tackling current automotive safety concerns, providing useful guidance on reducing challenges related to contemporary driving conditions.

Haris Zukić, Devleta Balić, Džanan Osmanović

AIM To investigate an influence of age and body mass index (BMI) as determinants of infertility treatment success in vitro fertilization (IVF) procedures confirmed so far, on the amount of Lactobacilus spp. (LS) and Gardnerella vaginalis (GV) in the endometrium in fresh IVF cycles at the time of embryo transfer. METHODS This a prospective single-centre study included patients who underwent fresh embryo transfer (ET) in a private IVF Centre. A catheter tip for embryo transfer was used for collecting samples from the endometrial cavity. Real time polymerase chain reaction (RT PCR) was used to determine LS and GV quantity. Patients were divided into two age groups: <35 years and ≥ 35 years. Normal BMI group included patients with 18.-24.9 kg/m2, and the increased BMI group patients with BMI ≥ 25kg/m2. RESULTS Tips for embryo transfer catheters were positive on LS in 55 (96.4%) patients. The median of quantification cycle of RT-PCR (Cq RT-PCR) for LS was 33, and 31 for the younger and older groups, respectively. Twenty-one (36.8%) patients tested positive for GV. The median of Cq RT-PCR for GV was 33 and 34 for the younger and older groups, respectively. There were 36 patients with normal and 18 with increased BMI. BMI showed no correlation with LS amount in the endometrial cavity. CONCLUSION Aging affects the endometrial microbiome resulting in an increase of Lactobacillus number, but not the number of GV.

Namik Selimović, Amina Marić, A. Šljivo, Aladin Altic, Irma Fajić, Lana Lekić, A. Durak-Nalbantić

AIM Despite advancements in the diagnosis, treatment and monitoring of patients with acute coronary syndrome (ACS), morbidity and mortality following ACS remain high. The aim of this study was to actively seek possible predictors of adverse outcomes after ACS aiming to identify high-risk patients promptly. METHODS This retrospective cohort study investigated patients with ACS hospitalized at Clinical Centre of the University of Sarajevo from 2019 to 2021. Patients were followed up for a period of 12 months post-discharge to assess major cardiovascular events (MACE) and MACE associated independent predictors. RESULTS The study included 121 patients, mostly male 102 (84.3%), with a mean age of 60.83±12.61 years; prevalent risk factors were hypertension 94 (77.7%), dyslipidaemia 84 (69.4%), diabetes mellitus 91 (75.2%), active smoking 67 (55.4%) and positive family history of cardiovascular diseases 81 (66.9%). MACE occurred in 33 (27.3%) patients since the initial ACS, and those patients were older (p=0.012), had higher level of creatinine (p<0.001), lower ejection fraction at discharge (p<0.001) and larger left atrial diameter (p=0.032). Serum creatinine (OR=1.014, 95% CI 1,003-1,026, p=0.017) and ejection fraction (OR=0.924, 95% CI 0,869-0,984, p=0.013) were independent predictors associated with a 12-month follow up MACE following ACS. CONCLUSION Monitoring of serum creatinine level, left atrial diameter, and ejection fraction post-acute coronary syndrome as potential indicators of future MACE within a 12-month follow-up period is of great importance. These findings emphasize the need for tailored management strategies to mitigate risks in this patient population.

Alen Omanović, Nejra Mlačo-Vražalić, A. Mlačo

AIM To investigate whether the radiographic progression of rheumatoid arthritis (RA) correlates with inflammatory markers and other laboratory values, and its association with treatment modalities. METHODS This observational study included 125 patients with seropositive RA. Data were obtained from patients' medical records from the year of 2022. Inclusion criteria were patients with seropositive RA who had attended follow-up with a rheumatologist. Basic patient data were collected: gender, age, duration of RA, hospital admission, systolic and diastolic blood pressure, and X-ray stage of RA. Stages of RA are defined by the American College of Rheumatology and they ranged from stage 1, which represents no destructive changes on X-ray, up to stage 4 where bony or fibrous ankylosis is present. RESULTS There were no differences in X-ray stages of RA between genders. Patients with a higher X-ray stage were younger and had a longer duration of illness. Patients in stages III and IV had higher systolic blood pressure (BP), patients in stage IV had higher diastolic BP. Erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) were higher in X-ray stages II-IV compared to stage I. The patients treated with methotrexate had higher radiographic stages. CONCLUSION X-ray changes can be associated with CRP and ESR levels, since structural damage is related to RA disease activity and functional disability. The use of newer treatment modalities may be required to stop the radiographic progression of RA.

In the first part of the paper, we address an invertible matrix polynomial $L(z)$ and its inverse $\hat{L}(z) := -L(z)^{-1}$. We present a method for obtaining a canonical set of root functions and Jordan chains of $L(z)$ through elementary transformations of the matrix $L(z)$ alone. This method provides a new and simple approach to deriving a general solution of the system of ordinary linear differential equations $L\left(\frac{d}{dt}\right)u=0$ using only elementary transformations of the corresponding matrix polynomial $L(z)$. In the second part of the paper, given a matrix generalized Nevanlinna function $Q\in N_{\kappa }^{n \times n}$ and a canonical set of root functions of $\hat{Q}(z) := -Q(z)^{-1}$, we provide an algorithm to determine a specific Pontryagin space $(\mathcal{K}, [.,.])$, a specific self-adjoint operator $A:\mathcal{K}\rightarrow \mathcal{K}$ and an operator $\Gamma: \mathbb{C}^{n}\rightarrow \mathcal{K}$ that represent the function $Q$ in a Krein-Langer type representation. We demonstrate the main results through examples of linear systems of ODEs.

AIM To estimate prevalence of respiratory distress syndrome in preterm twins compared to preterm singletons. METHODS This is a retrospective observational point prevalence study conducted at the level of three neonatal intensive care units. Medical records of all preterm newborns (<37 weeks of gestation) with respiratory distress syndrome treated in a two-year period were reviewed. The birth order of twins, gestational age and mortality were analysed. RESULTS Out of 809 preterm newborns, 104 (12.9%) were twins. Median gestational age at birth was 30.3 (IQR 31.4-34.2) weeks. Respiratory distress syndrome was diagnosed in 525 (64.9 %) preterm newborns, of which 441 singletons and 84 twins. Prevalence of respiratory distress syndrome in first-born twins was not significantly higher compared with singletons, 67.3% (35/52) vs. 62.6 % (441/705), respectively (p=0.06). Prevalence of respiratory distress syndrome in second-born twins was 94.2 % (49/52), which was significantly higher compared with both singletons and first-born twins (p<0.001). The mortality rate of preterm newborns was significantly higher in second-born twins compared with singletons and first-born twins, 15.4 % vs. 6.8 % (p<0.001) and 15.4 % vs. 5.5% (p<0.001), respectively. CONCLUSION There was a higher risk of respiratory distress syndrome and higher mortality rate in twins compared with singletons, but only in second-born twins the difference was statistically significant.

Sergej M. Ostojic, V. Štajer, N. Todorovic, Marijana Ranisavljev, Bogdan Andjelic, J. Panić, Alexandros Nikolaidis, Ron Kramer et al.

A blend of creatine nitrate and creatinine has demonstrated promising bioavailability; however, prior studies have not thoroughly examined its pharmacokinetics and safety profiles, particularly its impact on kidney stress indicators, such as serum cystatin C. This study aimed to assess the effects of varying doses of creatine nitrate-creatinine intervention on pharmacokinetics and safety in healthy humans. Ten young adults (mean age 26.1 ± 5.0 years; 5 females) volunteered for this double-blind, crossover, randomized controlled trial. The participants were randomly assigned to receive either a low-dose creatine nitrate-creatinine mixture (CN-CRN-Low; 1.5 g of creatine nitrate and 1.5 g of creatinine), a high-dose creatine nitrate-creatinine mixture (CN-CRN-High; 3 g of creatine nitrate and 3 g of creatinine), or 1.5 g of creatine nitrate (CONTROL) in both a single-dose pharmacokinetics experiment, and a 14-day safety trial. Both CN-CRN-Low and CN-CRN-High interventions displayed increased volume of distribution and total clearance compared to the CONTROL intervention (P < 0.05) in a single-dose pharmacokinetics experiment. Additionally, the CN-CRN-High intervention showed significantly higher creatine maximum serum concentrations compared to the other interventions (P < 0.05). Serum cystatin C levels remained unchanged across all interventions (P = 0.65), with no participants experiencing abnormal cystatin C concentrations or major changes in other safety biomarkers. The present study demonstrates dose-specific utilization of creatine nitrate-creatinine intervention, with the mixture induced no kidney damage. Further studies are needed to explore the potential functional and performance benefits of creatine nitrate-creatinine supplementation in diverse clinical and athletic cohorts.

N. Milošević, Dušan Stupar, Nemanja Stanković, S. Pantelić, Nikola Stojanović, S. Stamenković, Nebojša Trajković, Igor Potparić

This study aimed to determine the influence of body composition on the muscle fitness of selected judokas. This study was conducted on a sample of 23 judokas (cadets n = 12, juniors n = 11), members of the male national team of Serbia. The assessment of body composition was performed using the InBody 720 (Biospace Co., Ltd., Seoul, Republic of Korea) and calipers. Muscle fitness was assessed using “Optojump” (Microgate, Bolzano, Italy), Fitrodine Premium (Fitronic, Bratislava, Slovakia), and a digital force instrument IMADA Z2H-1100 (Imada Inc., Northbrook, IL, USA). Regression analysis revealed a notable association between muscle mass and measures of explosive strength (countermovement jump (CMJ) p = 0.023; drop jump (DJ) p = 0.026). Moreover, this study’s results showed that back extension (p = 0.006; R2 = 0.61) and hand grip (p = 0.009; R2 = 0.52) provide a strong positive association with muscle mass. The findings suggest that tailored training and nutritional strategies that improve muscle mass might significantly enhance muscle fitness in young judokas, optimizing their performance.

Ever since Tommy Orange’s novel There There was published in 2018, Native American urban experience has been pointed out as the novel’s crux. The characters in the novel are Native American but most of them feel estranged from the community since they do not live on reservations, whereby the general implication is that reservations have become ossified as identity markers for many Native Americans. This paper aims to analyze how the novel’s characters use urban areas to create spaces of belonging, thus debunking the myth of the “reservation Indian”. Aided by Edward Soja’s theories on Thirdspace and Robert Tally’s theory of topophrenia, the paper discusses regional powwows, non-profit organizations, American Indian cultural centers, and digital storytelling/narrativization as specific examples of the subject’s awareness of space, their engagement and inscription into space through the practices mentioned above.

Ivan Radeljković, Lejla Osmanović

En tant qu’éditrice à la maison d’édition Svjetlost, basée à Sarajevo, écrivaine, critique littéraire et traductrice de langue française, Jasmina Musabegović a élargi les horizons culturels du public de lecture dans les années 80 et 90 du XXe siècle, tant en Bosnie-Herzégovine qu’en l’ex-Yougoslavie. Son lien avec la langue et la culture française commence avec son séjour à Paris et ses travaux de recherche sur Rastko Petrović, écrivain d’avant-garde serbe proche des surréalistes français. Grâce à sa sensibilité éditoriale, le public a pu découvrir des écrivains, philosophes, théoriciens français contemporains et généralement francophones, notamment à travers les éditions «Raskršća» et «Feniks». Cet aspect de son travail se caractérise par une imbrication complète de ses activités d’écrivain, de traductrice et d’éditrice.

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