Publications by authors named "Jeffrey Danielson"

Article Synopsis
  • Researchers studied mutations in a gene that affects a key protein involved in cell signaling, which is linked to severe health issues like impaired immunity in patients.
  • The mutations were found to disrupt normal cell behavior by promoting excessive cell growth and responses to immune signals, specifically T cell receptor stimulation.
  • The mutant protein was shown to interfere with a regulatory protein, leading to heightened activity of important signaling pathways that contribute to cell growth and survival.
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Article Synopsis
  • Breakthrough cases of severe COVID-19 in vaccinated individuals may be linked to weak or inadequate antibody responses, particularly among those already at risk.
  • A study of 48 vaccinated individuals with hypoxemic COVID-19 pneumonia found that about 24% had auto-antibodies (auto-Abs) that neutralized type I interferons, which are essential for the immune response.
  • The presence of these auto-Abs suggests that even with normal antibody responses to the vaccine, some individuals can still suffer severe effects from COVID-19, indicating a need for more targeted strategies for vulnerable populations.
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  • Pediatric COVID-19 (pCOVID-19) usually has mild symptoms, but some children may develop a serious condition called multisystem inflammatory syndrome in children (MIS-C), which can lead to significant health problems.
  • A study analyzed 110 children with COVID-19, 76 with MIS-C, and 76 healthy controls using advanced techniques to understand their immune responses and genetic factors.
  • The findings revealed different immune signatures between pCOVID-19 and MIS-C, suggesting that these conditions have distinct biological pathways, which could help in developing targeted treatments.
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Background: Biallelic loss-of-function mutations in CARMIL2 cause combined immunodeficiency associated with dermatitis, inflammatory bowel disease (IBD), and EBV-related smooth muscle tumors. Clinical and immunological characterizations of the disease with long-term follow-up and treatment options have not been previously reported in large cohorts. We sought to determine the clinical and immunological features of CARMIL2 deficiency and long-term efficacy of treatment in controlling different disease manifestations.

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Mutations in Dedicator of cytokinesis 8 (DOCK8) are a rare cause of combined immunodeficiency associated with atopy, infectious susceptibility, and risk for malignancy. We describe a 22-year-old male with a diagnosis of B cell lymphoblastic leukemia followed by Epstein-Barr virus (EBV)-associated diffuse large B cell lymphoma (DLBCL) with compound heterozygous mutations in DOCK8 and normal intracellular DOCK8 protein expression. Here, B cell lymphoblastic leukemia followed by EBV-associated DLBCL led to the discovery of DOCK8 deficiency.

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Three-dimensional (3D) cell culture models bridge the gap between two-dimensional (2D) monolayer cultures and animal models. Physiologically relevant, 3D culture models have significantly advanced basic cell science and provide unique insights into host-pathogen interactions intrinsically linked to cell morphology. Toxoplasma gondii is an obligate intravacuolar parasite that chronically infects a large portion of the global human population.

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Life-threatening pulmonary influenza can be caused by inborn errors of type I and III IFN immunity. We report a 5-yr-old child with severe pulmonary influenza at 2 yr. She is homozygous for a loss-of-function allele.

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Aim: To characterize the inpatient care received by individuals experiencing early psychotic episodes in an inner city hospital.

Method: Medical records of patients admitted between April 01, 2013, and March 31, 2015, to a psychiatric ward at an inner city hospital were retrospectively examined. Included in the study are patients who were 25 years of age or younger and were hospitalized for psychotic symptoms.

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In Toxoplasma gondii, an intracellular parasite of humans and other animals, host mitochondrial association (HMA) is driven by a gene family that encodes multiple mitochondrial association factor 1 (MAF1) proteins. However, the importance of MAF1 gene duplication in the evolution of HMA is not understood, nor is the impact of HMA on parasite biology. Here we used within- and between-species comparative analysis to determine that the MAF1 locus is duplicated in T.

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A₁ adenosine receptor (A₁AR) activation within the central nervous system induces torpor, but in obligate hibernators such as the arctic ground squirrel (AGS; Urocitellus parryii), A₁AR stimulation induces torpor only during the hibernation season, suggesting a seasonal increase in sensitivity to A₁AR signaling. The purpose of this research was to investigate the relationship between body temperature (Tb) and sensitivity to an adenosine A1 receptor agonist in AGS. We tested the hypothesis that increased sensitivity in A₁AR signaling would lead to lower Tb in euthermic animals during the hibernation season when compared with the summer season.

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Rationale: Schizophrenia patients and certain inbred mouse strains (i.e., DBA/2) show deficient sensory inhibition which has been linked to reduced numbers of hippocampal alpha7 nicotinic receptors and to underlying polymorphisms in the promoter region for the alpha7 gene.

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