Publications by authors named "Jacob Siedlik"

A momentous amount of health data has been and is being collected. Across all levels of health care, data are driving decision-making and impacting patient care. A new field of knowledge and role for those in health care is emerging-the need for a health data-informed workforce.

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Background: The purpose of this study was to determine the effect of a multicomponent rehabilitation protocol on functional outcomes in a post-acute care facility.

Methods: Eleven older, medically complex patients (80.3 ± 7.

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Gastrointestinal (GI) disturbances are a prevalent cause of marathon related complaints, and in extreme cases can promote life-threatening conditions such as exertional heat stroke. Our aim was to study intestinal cell injury [via intestinal fatty acid binding protein (I-FABP)] and perceived GI distress symptoms among marathon runners. We also examined potential risk factors (e.

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Doxorubicin (DOX), a potent chemotherapy agent, useful in the treatment of solid tumors, lymphomas, and leukemias, is limited by its potentially lethal cardiotoxicity. However, exercise has been consistently shown to mitigate the side effects of DOX, including cardiotoxicity. To date, most studies examining the relationship between exercise and DOX-induced cardiotoxicity have focused on aerobic exercise, with very few examining the role of anerobic activity.

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Traumatic spinal cord injury (SCI) results in wide-ranging cellular and systemic dysfunction in the acute and chronic time frames after the injury. Chronic SCI has well-described secondary medical consequences while acute SCI has unique metabolic challenges as a result of physical trauma, in-patient recovery and other post-operative outcomes. Here, we used high resolution mass spectrometry approaches to describe the circulating lipidomic and metabolomic signatures using blood serum from mice 7 d after a complete SCI.

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  • Pathogenic variants in KMT5B, a lysine methyltransferase, are linked to global developmental issues, macrocephaly, autism, and other congenital anomalies, but the disorder is still not fully understood.
  • A study examining 43 patients revealed new significant features like hypotonia and congenital heart defects not previously associated with this condition.
  • Research using patient cell lines and KMT5B knockout mice showed that these variants lead to slow growth and highlighted alterations in pathways related to nervous system development, enhancing our understanding of the disorder's molecular mechanisms.
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  • This study compared the effects of a single set (SS) versus multiple sets (MS) of resistance exercise on the Akt/PKB signaling pathway, IGF-1, and IGF-1R expression in recreationally active men.
  • Sixteen participants underwent three muscle biopsies at different time intervals—before, 15 minutes after, and 180 minutes after exercise—while performing either a single or multiple set leg press.
  • Results showed no significant differences between the SS and MS groups in Akt signaling or IGF-1 expression; however, there was a notable increase in IGF-1R expression in the SS group, indicating that a single set may produce similar acute muscle responses to multiple sets.
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Barker, L, Siedlik, J, Magrini, M, Uesato, S, Wang, H, Sjovold, A, Ewing, G, and Harry, JR. . Eccentric force velocity profiling: motor control strategy considerations and relationships to strength and jump performance.

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COVID-19 emerged at varying intervals in different regions of the United States in 2020. This report details the epidemiologic and genetic evolution of Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) during the first year of the epidemic in the state of Nebraska using data collected from the Creighton Catholic Health Initiatives (CHI) health system. Statistical modelling identified age, gender, and previous history of diabetes and/or stroke as significant risk factors associated with mortality in COVID-19 patients.

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The Marine Corps Martial Arts Program (MCMAP) was developed to prepare Marines for complex battlefield situations that include hand-to-hand combat and ethical decision making. The objective of this study was to quantify changes in ethical decision-making following MCMAP training. Fifty-five, active duty, newly enlisted U.

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  • - The study explored how muscle activation and motor unit number estimation (MUNE) affect the rate of torque development (RTD) during rapid muscle contractions in younger (average age 22) and older men (average age 74).
  • - Researchers recorded early phase RTD and muscle excitation using surface electromyography from the quadriceps, finding that muscle activation significantly influenced RTD, especially in older men.
  • - The results indicated that older adults rely more on muscle activation at the start of contractions than younger adults, while MUNE did not significantly impact RTD for either age group.
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  • The study investigates the impact of Parkinson's disease (PD) on skeletal muscle function during a fatiguing exercise protocol compared to non-impaired older adults (OLD).
  • Participants performed isometric knee extensions while their muscle response was measured through electrical stimuli to assess fatigue.
  • Results show that while maximum torque generation remained similar, PD individuals experienced a slower decline in muscle contraction rate compared to OLD, suggesting less fatigue in PD patients' skeletal muscle.
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This investigation aimed to determine the effect of a multi-ingredient pre-workout supplement (MIPS) on heart rate (HR), perceived exertion (RPE), lactate concentration, and time to fatigue (TTF) during a running task to volitional exhaustion. Eleven NCAA Division I cross-country runners (20 ± 2 year; height: 171 ± 14 cm; weight: 63.5 ± 9.

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The current study examined differences in heart rate (HR) variability (HRV) across student-athlete eligibility classifications within a men's soccer team. The study also aimed to identify any differences in HRV while competing at home or away. Data collection covered an entire collegiate season, commencing in the preseason and concluding upon elimination from the NCAA Soccer tournament.

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The current study examined differences in heart rate variability (HRV) across student-athletes of different eligibility classifications and analyzed differences in HRV when competing at home or away. Fourteen female collegiate volleyball players volunteered for the study. Data collection encompassed an entire collegiate season, with comparisons in HRV made between home and away games, as well as pre-gameday, gameday, and post-gameday recordings for the whole squad.

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Infection with HIV-1 remains uncurable due to reservoirs of latently infected cells. Any potential cure for HIV will require a mechanism to identify and target these cells in vivo. We created a panel of Jurkat cell lines latently infected with the HIV DuoFlo virus to identify candidate biomarkers of latency.

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  • * Plasma samples were collected from 20 individuals exposed to or recovering from COVID-19, revealing that all subjects had SARS-CoV-2 specific IgG antibodies, with most showing high levels of nAb and strong ADCC activity.
  • * The results suggest that vaccines should not only assess neutralizing antibodies but also the ability to mediate ADCC, highlighting the need for a broader understanding of immune responses to SARS-CoV-2.
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Unlabelled: Previous research has shown that resistance training (RT) before doxorubicin (DOX) treatment attenuates the decline in muscle dysfunction; however, the effect of RT during DOX treatment is less known.

Purpose: Investigate the effects of RT before and during a 4-wk course of incremental DOX treatment on skeletal muscle function.

Methods: Male, Sprague-Dawley rats (N = 36) were randomly assigned to the following groups: sedentary+saline (SED + SAL), sedentary+DOX (SED + DOX), RT + SAL, or RT + DOX.

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Early studies in exercise immunology suggested acute bouts of exercise had an immunosuppressive effect in human subjects. However, recent data, show acute bouts of combined aerobic and resistance training increase both lymphocyte activation and proliferation. We quantified resistance exercise-induced changes in the activation state of CD4 T lymphocytes via surface protein expression and using a medically relevant model of infection (HIV-1).

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Spinal cord injury (SCI) results in rapid muscle atrophy and an oxidative-to-glycolytic fiber-type shift. Those with chronic SCI are more at risk for developing insulin resistance and reductions in glucose clearance than able-bodied individuals, but how glucose metabolism is affected after SCI is not well known. An untargeted metabolomics approach was utilized to investigate changes in whole-muscle metabolites at an acute (7-day) and subacute (28-day) time frame after a complete T9 spinal cord transection in 20-week-old female C57BL/6 mice.

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Recent work investigating exercise induced changes in immunocompetence suggests that some of the ambiguity in the literature is resultant from different cell isolation protocols and mitogen selection. To understand this effect, we compared post-exercise measures of T cell activation and proliferation using two different stimulation methods (costimulation through CD28 or stimulation with phytohaemagglutinin [PHA]). Further, we investigated whether exercise induced changes are maintained when T cell isolation from whole blood is delayed overnight in either a room temperature or chilled (4°C) environment.

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Assessment of heart rate variability (HRV) is a common approach to examine cardiac autonomic nervous system modulation that has been employed in a variety of settings. Frequently, both the root mean square of successive differences (RMSSD) and SD1, which is a Poincaré plot component, have been used to quantify short-term heart rate variability. It is not typically appreciated, however, that RMSSD and SD1 are identical metrics of HRV.

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Objective: Asthma is a common chronic childhood disease worldwide. Socioeconomic status, genetic predisposition and environmental factors contribute to its incidence and severity. A disproportionate number of children with asthma are economically disadvantaged and live in substandard housing with potential indoor environmental exposures such as cockroaches, dust mites, rodents and molds.

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Objective: Lymphocyte proliferative responses are commonly used to assess immune function in clinical settings, yet it is unclear how proliferative capacity is altered by exercise. This analysis aims to quantitatively assess the proliferative response of lymphocytes following an acute bout of exercise.

Methods: Electronic databases were searched for articles containing the keywords "exercise" OR "acute" OR "aerobic" OR "resistance training" OR "immune function" AND "proliferation" AND "lymphocyte.

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