Luis Ramírez

ORCID: 0000-0001-5387-6127
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About
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Research Areas
  • Burn Injury Management and Outcomes
  • Immune Response and Inflammation
  • Transplantation: Methods and Outcomes
  • Brain Metastases and Treatment
  • Thermal Regulation in Medicine
  • Wound Healing and Treatments
  • Alcohol Consumption and Health Effects
  • Spine and Intervertebral Disc Pathology
  • Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis
  • Management of metastatic bone disease
  • Heme Oxygenase-1 and Carbon Monoxide
  • Respiratory Support and Mechanisms
  • Cardiac Arrest and Resuscitation
  • Palliative Care and End-of-Life Issues
  • Immune cells in cancer
  • Effects of Radiation Exposure
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Neuroinflammation and Neurodegeneration Mechanisms
  • Spinal Fractures and Fixation Techniques
  • Fatty Acid Research and Health
  • Cancer Treatment and Pharmacology
  • S100 Proteins and Annexins
  • Lung Cancer Research Studies
  • Barrier Structure and Function Studies
  • Glioma Diagnosis and Treatment

Duke Medical Center
2019-2021

Duke University
2019-2021

Duke University Hospital
2020-2021

Duke Cancer Institute
2020-2021

Loyola University Chicago
2012-2018

Loyola University Medical Center
2006-2014

Florida International University
2014

Burn Institute
2006-2013

Loyola Medicine
2012

Universidade Federal do Triângulo Mineiro
2012

Abstract Advanced age is associated with alterations in innate and adaptive immune responses, which contribute to an increased risk of infection elderly patients. Coupled this dysfunction, patients demonstrate impaired wound healing elevated rates dehiscence chronic wounds. To evaluate how advanced alters the host response cutaneous infection, we developed a murine model Staphylococcus aureus young (3–4 mo) aged (18–20 BALB/c mice. Aged mice exhibit bacterial colonization delayed closure...

10.4049/jimmunol.1201213 article EN The Journal of Immunology 2013-01-15

Objectives: To determine whether the graded severity of smoke inhalation is reflected by acute pulmonary inflammatory response to injury. Design: In a prospective observational study, we assessed bronchoalveolar lavage fluid for both leukocyte differential and concentration 28 cytokines, chemokines, growth factors. Results were then compared injury as determined Abbreviated Injury Score criteria (0, none; 1, mild; 2, moderate; 3, severe; 4, massive). Setting: All patients enrolled at single...

10.1097/ccm.0b013e3182374a67 article EN Critical Care Medicine 2011-11-04

Laboratory evidence suggests that intestinal permeability is elevated following either binge ethanol exposure or burn injury alone, and this barrier dysfunction further perturbed when these insults are combined. We others have previously reported a rise in both systemic local proinflammatory cytokine production mice after the combined insult. Knowing long myosin light-chain kinase (MLCK) important for epithelial maintenance can be activated by cytokines, we examined whether inhibition of...

10.1152/ajpgi.00157.2012 article EN AJP Gastrointestinal and Liver Physiology 2012-07-13

We aimed to determine whether the severity of inhalation injury evokes an immune response measurable at systemic level and further characterize balance pro- anti-inflammation early after burn injury.Previously, we reported that pulmonary inflammatory is enhanced with worse grades those who die injuries have a blunted profile compared survivors.From August 2007 June 2011, bronchoscopy was performed on 80 patients admitted intensive care unit when smoke suspected. Of these, graded into 1 5...

10.1097/sla.0b013e318275f424 article EN Annals of Surgery 2012-11-16

We present the case of a 38-year-old patient without risk factors, who presented with Fournier’s gangrene secondary to marsupialization Bartholin´s gland. Fournier´s is an extremely rare complication after instrumented management gland abscess. The aims explore further evidence regarding clinical presentation, diagnosis, and timely these surgical complication, due its rapid progression it can compromise patient´s life.

10.18203/2320-1770.ijrcog20250525 article EN International Journal of Reproduction Contraception Obstetrics and Gynecology 2025-02-26

Here, we studied in vitro cytokine production by splenic macrophages obtained from young and aged BALB/c wild type (WT) IL-6 knockout (IL-6 KO) mice. Relative to WT mice given lipopolysaccharide (LPS), those had decreased of proinflammatory cytokines. In contrast, when compared KO mice, LPS stimulation yielded higher levels these cytokines cells Aging or deficiency did not affected the percentage F4/80(+) macrophages, surface expression Toll-like receptor 4 (TLR4) components receptor....

10.1155/2010/475139 article EN cc-by Mediators of Inflammation 2010-01-01

Interleukin 6 (IL-6) is an inflammatory cytokine known to be elevated in chronic diseases and after insults such as trauma infection. Although necessary for the development of B cells Th17 cells, IL-6, at levels, can also cause tissue damage lead a rise inflammation. Previous work our laboratory has shown that IL-6 increased both systemically multiple organ systems including ileum ethanol exposure burn injury. As this combined insult causes intestinal morphological damage, tight junction...

10.1097/shk.0b013e318289d6c6 article EN Shock 2013-02-01

This study was designed to determine whether the acute-phase response in aged mice is altered by interleukin (IL) 6 deficiency. Young and wild-type (WT) IL-6 knockout (KO) BALB/C female were injected with lipopolysaccharide (LPS; 1.5 μg/g body weight). After 24 h, KO had an improved survival when compared WT mice. Serum levels of animals given LPS determined and, as expected, significantly higher young LPS-treated (P < 0.05). protein, serum amyloid A, 50% lower relative 0.001). In contrast,...

10.1097/01.shk.000029553.39081.ec article EN Shock 2006-05-22

Journal Article Early Pulmonary Immune Hyporesponsiveness Is Associated With Mortality After Burn and Smoke Inhalation Injury Get access Christopher S. Davis, MD, MPH, MPH *Burn Shock Trauma Institute, Department of Surgery, Loyola University Medical Center, Maywood, Illinois Search for other works by this author on: Oxford Academic Google Scholar Joslyn M. Albright, MD Stewart R. Carter, Luis Ramirez, BA, BA Hajwa Kim, MA, MS, MS †Center Clinical Translational Science, at Chicago Richard L....

10.1097/bcr.0b013e318234d903 article EN Journal of Burn Care & Research 2011-10-06

Background: Clinical and laboratory evidence suggests that alcohol consumption prior to burn injury leads dysregulated immune function subsequent higher rates of morbidity mortality. Our previously observed levels pro‐inflammatory cytokines leukocyte infiltration in the lungs mice following ethanol injury. To understand mechanism increased inflammatory response, we looked at different signaling initiators inflammation including toll‐like receptors 2 4 (TLR2 4) pathways. Methods: Wild‐type,...

10.1111/j.1530-0277.2010.01260.x article EN Alcoholism Clinical and Experimental Research 2010-07-01

Nuclear disaster associated with combined radiation injury (CRI) and trauma or burns results in higher mortality than component injuries. Early death is caused by sequelae of gastrointestinal (GI) leakiness such as bacterial translocation shock. We developed a murine model to characterize GI after CRI determine the extent barrier disruption. Animals received (5.5 Gy) alone 15% total body surface area (TBSA) scald burn were euthanized at 24, 48, 72 h. Mesenteric lymph node homogenate was...

10.1097/shk.0b013e3182a2c5b5 article EN Shock 2013-09-18

Approximately half of all adult burn patients are intoxicated at the time their injury and have worse clinical outcomes than those without prior alcohol exposure. This study tested hypothesis that intoxication alters gut-liver axis, leading to increased pulmonary inflammation mediated by burn-induced IL-6 in liver. C57BL/6 mice were given 1.2 g/kg ethanol 30 min a 15% total body surface area burn. To restore gut barrier function, specific myosin light chain kinase inhibitor membrane-permeant...

10.1152/ajpgi.00185.2014 article EN AJP Gastrointestinal and Liver Physiology 2014-08-08

Both clinical and experimental data have linked acute ethanol exposure to increased susceptibility infection as well morbidity mortality after injury. Macrophages play an integral role in the innate immune system are important priming adaptive system. In this study, we investigated effect of a single vivo macrophages physiologically relevant levels (1.2 2.9 g/kg) followed by ex stimulation with lipopolysaccharide (LPS) or bacteria. Our study confirms work others showing that administration...

10.1089/jir.2007.0111 article EN Journal of Interferon & Cytokine Research 2008-07-01

Journal Article Decreased Pulmonary Inflammation After Ethanol Exposure and Burn Injury in Intercellular Adhesion Molecule-1 Knockout Mice Get access Melanie D. Bird, PhD, PhD *Department of Surgery, Loyola University Medical Center, Maywood, Illinois†Burn Shock Trauma Institute, Illinois‡Alcohol Research Program, Illinois Search for other works by this author on: Oxford Academic Google Scholar Michelle O. Morgan, MEd, MEd Luis Ramirez, BA, BA Sherri Yong, MD, MD §Department Pathology,...

10.1097/bcr.0b013e3181e4c58c article EN Journal of Burn Care & Research 2010-05-18

Background Ethanol (EtOH) exposure prior to traumatic injury, such as a burn, elevates systemic and local inflammatory responses increases morbidity mortality. Adipose is large tissue mass that often inflamed during obesity or other stresses, which disturbs metabolic homeostasis. To date, there has been little investigation into the response of adipose after combined EtOH burn injury. Methods Two regimens were utilized examine role inflammation in Mice either given single episodic binge...

10.1111/acer.12210 article EN Alcoholism Clinical and Experimental Research 2013-08-01

In this study, the role and fate of AMs were examined in pulmonary inflammation after intoxication injury. Clinical evidence has revealed that half all burn patients brought to emergency department are intoxicated at time This combined insult results amplified neutrophil accumulation edema, with an increased risk lung failure mortality, relative either alone. We believe excessive inflammation, which also parallels decreased function, is mediated part by AMs. Restoration tissue homeostasis...

10.1189/jlb.3ma0316-111r article EN Journal of Leukocyte Biology 2016-08-16

Pulmonary infections are a major cause of mortality in the critically ill burn patient. Alcohol consumption before increases risk pulmonary infection. Previously, we have shown an elevated and lung pathology mice given ethanol intratracheal infection relative to controls. Here examine cellular composition at 24 48 h circulation alveoli infected alcohol burn. At after injury, blood neutrophils obtained from exposed were 2-fold above those experimental controls (P < 0.05). By h, number...

10.1097/shk.0b013e31820217c9 article EN Shock 2010-11-10

Given the high symptom burden and complex clinical decision making associated with a diagnosis of brain metastases (BM), specialty palliative care (PC) can meaningfully improve patient quality life. However, no prior study has formally evaluated patient-specific factors PC consultation among BM patients.We examined rates consults in cohort 1303 patients admitted to three tertiary medical centers from October 2015 December 2018. Patient demographics, surgical status, 30-day readmission, death...

10.1093/nop/npab016 article EN Neuro-Oncology Practice 2021-02-24
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