Polygonum aviculare and Persicaria amphibia (subfam. Polygonoideae) are used in traditional cuisines and folk medicine in various cultures. Previous studies indicated that phytochemicals obtained from Polygonoideae plants could sensitize chemoresistant cancer cells and enhance the efficacy of some cytostatics. Here, the cytotoxic properties of chemically characterized ethanol extracts obtained from P. aviculare and P. amphibia, individually and in combination with doxorubicin (D), were determined against hepatocarcinoma HepG2 cells. Phenolic composition, cell viability, cell cycle, apoptosis, and the expression of Keap1 and Nrf2 were examined by following methods: LC-MS/MS, LC-DAD-MS, MTT, flow cytometry, and qRT-PCR. Extracts were rich in dietary polyphenolics. Synergistic cytotoxicity was detected for extracts combined with D. The observed synergisms are linked to the interference with apoptosis, cell cycle, and expression of Keap1-Nrf2 genes involved in cytoprotection. The combined approach of extracts and D could emerge as a potential pathway of chemotherapy improvement.

Abstract Introduction During Covid-19 many staff members were redeployed to the Intensive Care Unit (ICU) with little opportunity to train in the new skills they would require. One such skill was the transfer of a critically ill, and contagious, patient from ICU; a risky and complicated procedure which requires planning, preparation, risk assessment, situational awareness and, ideally, experience. To assist our colleagues in this skill an existing ICU transfer course has been adapted to cover the Covid-19 situation, or any similar contagious pandemic, in patient transfer. Methods An in-situ simulation method was chosen as the most realistic method of immersing our participants into the environment of ICU and to highlight real-life complexities and issues they may face. A multidisciplinary training session was devised so that novice anaesthetists, ACCPs and nurses could learn together, reflective of the usual team. Human factors such as communication, team leadership, task management and situational awareness are the focus of the post-simulation debrief, and human factors sheets have been created to guide the participants in analysing these skills. Pre- and post-simulation confidence, knowledge and attitudes will be assessed using validated appraisal tools and questionnaires to gather both quantitative and qualitative data about the experience. Discussion Multidisciplinary training is often difficult to arrange, due to the different requirements, processes, and procedures each department demands. A hidden blessing of Covid-19 is the realisation that this barrier can be broken, for the benefit of our patients and colleagues alike, and training sessions like this implemented.

ABSTRACT Two cases are presented with coronavirus disease 19 (COVID-19)-related hiccups: one during initial presentation and one 10 days after COVID-19 diagnosis. Hiccups in both patients were resistant to treatment and responded only to chlorpromazine. COVID-19 patients may present with hiccups and also may have hiccups after treatment. Resistant hiccups without any underlying disease other than COVID-19 should be considered in association with COVID-19 and may respond well to chlorpromazine.

A 65-year-old woman with a negative family history of breast cancer presented with a palpable mass in the left breast’s central portion. Mammography revealed an oval heteroechogenic, partly solid, partly cystic, sharply demarcated mass, measuring 100×90 mm in greatest diameter, classified as BI-RADS 4c, according to ACR BI-RADS Atlas Fifth Edition (Figure 1A-B). Breast MRI showed a lobulated mass with smooth margins appearing hypointense on T1WI and high signal intensity on T2WI (Figure 1C-D). A core needle biopsy revealed a cellular neoplasm, composed of small, closely packed tubules with spindle cell intervening stroma without prominent atypia and mitotic activity, classified as B3 category according to the UK National Coordinating Committee for Breast Screening Pathology (Figure 2A). The multidisciplinary tumor board discussed the case and recommended a wide surgical excision. With the patient’s approval, a left mastectomy was recommended and performed. The axillary clearance was not performed. The 100×90 mm tumor was grossly well-circumscribed, grayish-white, and predominantly solid, with a smaller cystic component, without necrosis and hemorrhage (Figure 2B). Histopathologic examination revealed a well-circumscribed tumor with two distinct components (tubular adenoma and phyllodes tumor) with the transition to one another (Figure 2C). The larger portion of the tumor was composed of closely packed small round to oval tubules with little intervening spindle cell stroma consistent with tubular adenoma. The smaller component showed a biphasic fibroepithelial tumor with leaf-like projections with moderately cellular stroma (Figure 2D-E). The stromal cells exhibited mild to moderate atypia, and their mitotic activity was up to six mitoses/10 hpf (Figure 2F). Stromal overgrowth was absent, while the malignant heterologous elements were not observed despite the exhaustive tumor sampling (25 paraffin blocks). The final diagnosis was a complex fibroepithelial tumor composed of borderline phyllodes and tubular adenoma. Clinical Science

This year the journal "Medical Archives" celebrates 75 year of existing. "Medicinski Arhiv/Medical Archives" was founded in 1947 as official journal of the Association of Physicians (Sabor ljekara Bosne i Hercegovina) of Bosnia and Herzegovina and the first Editorial board was consisted of academicans: Vladimir Cavka (Professor of Oftalmology), Blagoje Kovacevic (Professor of Surgery), Bogdan Zimonjic (Professor of Internal medicine), and Ibro Brkić (Professor of Internal medicine). Exactly the Medical Archives journal was a key milestone that helped in education of all academic and professional staff that became the foundation of Bosnian and Herzegovinian medicine as a science and health care as a profession. Medicinski Arhiv was included in largest bimedical database Medline in 1947 and till now in that database is deposited more than 7000 papers. Also this journal has highest h-Index in Scopus database ranked by SCImago rank. In Medicinski Arhiv journal authors from more than 60 countries from whole the world published their papers, some of them with very high Scopus h-Index.

Unmanned aerial vehicle (UAV) assisted wireless caching networks (WCN) have been recognized as a promising way to reduce the network load and improve the energy efficiency in the sixth generation (6 G) communication systems. Aiming to improve spectrum efficiency and system capacity, we apply non-orthogonal multiple access (NOMA) in UAV-assisted WCN to serve multiple users on the same spectrum simultaneously and propose the cross-layer resource allocation strategy including the scheduling of UAVs, the grouping of users, and the allocation of power. First, the $\rho$-K-means algorithm is proposed to assign users to multiple clusters and deploy UAVs according to the distance from UAVs to the base station in the UAV deployment layer. Then, the base station broadcasts the popular files to UAVs via NOMA in the content placement layer. Based on the existing fixed power allocation strategy, we propose a statistic quality of service (QoS) based fixed (SQF) power allocation method to take the statistic QoS of the popular files into consideration and improve the energy efficiency through introducing the discount factor. On the basis of SQF, an instantaneous QoS based adaptive (IQA) strategy allocates power according to the instantaneous QoS of the popular files to reduce the file outage probability. Furthermore, we propose an improved method that is a cross-layer based optimal (CLO) power allocation strategy to maximize the system hit probability. Finally, in the content delivery layer, users in each cluster are grouped according to the channel gain from users to UAVs. In addition, each UAV serves two users on the same time-frequency resource block based on the cognitive radio inspired power allocation for the NOMA user pairs. Simulation results confirm that the proposed $\rho$-K-means algorithm and CLO strategy reduce the file outage probability and improve the hit probability.