Publications by authors named "JANOWSKI M"

Robotic catheters enable precise steering of their distal tip while inside the body's blood vessels, and with this ability comes the need for control systems that fit into the clinical workflow. In this study, we propose a novel bedside admittance controller composed of a force/torque sensor with a 3D-printed handle and a low-profile table mount. The controller is intended to be placed at the insertion site to the body and allows simultaneous insertion and steering of a dual-segment fluid-actuated soft robot catheter.

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  • * A previous study showed that transplanting canine glial-restricted progenitors (cGRPs) into certain genetically altered mice led to some myelination, but results varied based on where the cells were injected.
  • * The current research aimed to enhance the effectiveness of cGRP transplantation by using a multisite injection method, resulting in increased myelination, higher expression of myelin proteins, and improved survival rates in the treated mice.
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  • Current radiotherapy treatments for glioblastoma (GBM) are often ineffective, but regenerative medicine offers new possibilities for increasing radiation doses safely.
  • The study investigated the effects of ultra-high dose fractionated radiation on tumors and brain injury in immunocompetent mice, assessing how the hypoxia-inducible factor-1 alpha (Hif-1α) might help reduce radiation-induced damage.
  • Results showed that a fractionated radiation regimen of 3×20 Gy eradicated GBM with mild brain injury, while higher doses caused severe damage; targeting Hif-1α may help mitigate vascular issues following radiation.
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Fluconazole (2-(2,4-difluorophenyl)-1,3-bis(1-1,2,4-triazol-1-yl)propan-2-ol), which was patented in 1981 and introduced for commercial use in 1988, is a widely utilized antifungal drug whose mechanism of action involves inhibition of the activity of 14-α lanosterol demethylase. Its safety and effectiveness have established it as one of the most frequently employed antifungal agents. Resistance to azole antifungal drugs is becoming more common.

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: The effective treatment of chronic myeloid leukemia leads to the restoration of proper immune system function. We aimed to investigate fluctuations in circulating cytokines, angiogenic factors and complement components in patients with CML during the first year of treatment with TKI and correlate them with the degree of achieved molecular response. : We recruited 31 patients with newly diagnosed CML.

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  • Cerebral small vessel disease (CSVD) is a major cause of cognitive decline in older adults, but effective treatments are currently lacking.
  • This study examined the connection between neuroinflammation and CSVD using SHRSP rats, which showed impaired learning and memory alongside increased activation of NLRP3 signaling and pro-inflammatory factors.
  • The findings suggest that targeting the NLRP3 inflammatory pathway may offer new treatment options for CSVD by addressing key underlying neuropathological changes.
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  • Microneedle arrays (MNAs) are being developed for better drug and cell delivery in biomedical applications, but creating effective high-aspect-ratio MNAs has been challenging.* -
  • Researchers used a hybrid 3D printing technique that combines various advanced methods to create hollow MNAs specifically designed for delivering mammalian cells.* -
  • Experiments showed that MNAs with a 25-micron inner diameter significantly reduced cell viability, while those with diameters of 50 microns or larger performed similarly to conventional needles, highlighting their potential for effective cell delivery.*
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The central nervous system (CNS) is home to neuronal and glial cells. Traditionally, glia was disregarded as just the structural support across the brain and spinal cord, in striking contrast to neurons, always considered critical players in CNS functioning. In modern times this outdated dogma is continuously repelled by new evidence unravelling the importance of glia in neuronal maintenance and function.

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Exosome-based treatments are gaining traction as a viable approach to addressing the various issues faced by an ischemic stroke. These extracellular vesicles, mainly produced by Mesenchymal Stem Cells (MSCs), exhibit many properties with substantial therapeutic potential. Exosomes are particularly appealing for stroke therapy because of their low immunogenicity, effective cargo transport, and ability to cross the blood-brain barrier.

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  • Conventional radiation therapy for glioblastoma (GBM) has limitations, but this study investigates the effects of ultra-high dose fractionated radiation on brain injury and tumor responses in mice while assessing the role of the HIF-1α protein.
  • The research involved different groups of mice receiving varying doses of radiation, with assessments done using MRI and other techniques to monitor brain damage and tumor growth.
  • Results showed that a dose of 3×20 Gy effectively eradicated GBM with only mild brain injury, suggesting that targeting HIF-1α could help reduce vascular damage following radiation, paving the way for improved treatments.
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Objective: Intracerebral delivery of agents in liquid form is usually achieved through commercially available and durable metal needles. However, their size and texture may contribute to mechanical brain damage. Glass pipettes with a thin tip may significantly reduce injection-associated brain damage but require access to prohibitively expensive programmable pipette pullers.

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  • The study examines factors affecting mRNA engineering of mesenchymal stem cells (MSCs), focusing on transfection methods, mRNA purification, and capping types.
  • Results show that Lipofectamine 2000 is superior to TransIT for MSC transfection, while HPLC purification is essential for maintaining MSC health.
  • It concludes that using Lipofectamine 2000 with HPLC-purified mRNA and β-S-ARCA D1 capping achieves enhanced protein production, albeit with reduced MSC metabolic activity.
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Apart from the driver mutations, high molecular risk (HMR) variants and other factors have been reported to influence the prognosis of primary myelofibrosis (PMF). The aim of our study was to investigate the impact of laboratory and molecular characteristics at the time of diagnosis (TOD) on the PMF outcome. The study group consisted of 82 patients recruited from three Polish university centers.

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  • The blood-brain barrier (BBB) is crucial for protecting the central nervous system (CNS) but also prevents many drugs from reaching the brain, particularly larger ones.
  • Despite advancements in understanding the BBB's structure and its role in diseases, delivering therapeutics to the CNS remains a significant challenge.
  • The text reviews methods for temporarily opening the BBB to allow drug entry while discussing concerns about potential negative effects and emphasizing the need for further research on BBB dynamics.
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Purpose: During minimally invasive surgery, surgeons maneuver tools through complex anatomies, which is difficult without the ability to control the position of the tools inside the body. A potential solution for a substantial portion of these procedures is the efficient design and control of a pneumatically actuated soft robot system.

Methods: We designed and evaluated a system to control a steerable catheter tip.

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  • Researchers developed a new injectable hydrogel made from methacrylated gellan gum (Mn/GG-MA) that can be monitored in real-time using MRI for cell delivery to the central nervous system.
  • The hydrogel is stable, detectable in MRI scans, and can successfully encapsulate and maintain the viability of human adipose-derived stem cells during culture.
  • In animal tests, the Mn/GG-MA solution remained traceable on MRI after injection, demonstrating its potential for non-invasive cell delivery and image-guided treatments in neuroscience.
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  • Microinjection protocols using hollow microneedle arrays (MNAs) are important in biomedical fields, but manufacturing challenges hinder their widespread application in high-density settings.
  • A new hybrid additive manufacturing method combining digital light processing (DLP) 3D printing and direct laser writing (DLW) has been developed to create robust MNAs for fluid microinjections.
  • Experimental results show that these MNAs maintain integrity during use and successfully deliver fluids into brain tissue, indicating their potential for advanced biomedical applications.
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The treatment of infectious diseases is a challenging issue faced by the medical community. The emergence of drug-resistant strains of bacteria and fungi is a major concern. Researchers and medical professionals are working to develop new and innovative treatments for infectious diseases.

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Background: The use of subcutaneous implantable cardioverter-defibrillators (S-ICD) has been growing in Poland since 2014. The Polish Registry of S-ICD Implantations was run by the Heart Rhythm Section of the Polish Cardiac Society between May 2020 and September 2022 to monitor the implementation of that therapy in Poland.

Aims: To investigate and present the state-of-the-art of S-ICD implantation in Poland.

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  • Brain and spinal tumors impact 1 in 1000 individuals by age 25, with a 30-40% mortality rate but a majority achieving cure, though often with lifelong disabilities due to brain injury before and after treatment.
  • Only four drugs have been approved for brain tumors in the last 40 years, highlighting a significant gap in treatment, particularly for children, and many new drugs struggle to penetrate the blood-brain barrier (BBB).
  • This review discusses innovative methods for enhancing drug delivery to brain tumors, including strategies to facilitate BBB penetration and bypass, aiming to improve patient outcomes and possibly re-evaluate previously ineffective drugs.
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Background: Many young adults do not reach the World Health Organization's minimum recommendations for the amount of weekly physical activity. The virtual reality 3D head-mounted display (VR 3D HMD) exergame is a technology that is more immersive than a typical exercise session. Our study considers gender differences in the experience of using VR games for increasing physical activity.

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  • Mannitol is used to reduce intracranial pressure and create osmotic blood-brain barrier openings, but a safer, non-invasive monitoring method for its dosing is needed.
  • The study developed a label-free MRI technique, utilizing Chemical Exchange Saturation Transfer (CEST), to measure mannitol levels in the brain after administration in rat models.
  • Results showed that CEST MRI effectively detected mannitol in the brain, with high doses leading to accumulation, and this method could help optimize mannitol usage for enhanced safety and effectiveness in clinical settings.
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Based on the results of previous work, we designed and synthesized 1,3,4-thiadiazole derivatives. The cytotoxic activity of the obtained compounds was then determined in biological studies using MCF-7 and MDA-MB-231 breast cancer cells and a normal cell line (fibroblasts). The results showed that all compounds displayed weak anticancer activity towards two breast cancer lines: an estrogen-dependent cell line (MCF-7) and an estrogen-independent cell line (MDA-MB-231).

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