Radionuclide Evaluation of Renal Transplant Patients

Radionuclide examinations provide considerable information in evaluating patients who have received renal transplants. In the uncomplicated case, baseline data should be obtained so that subsequent changes in renal function can be better documented. In the complicated case, rapid delineation of the problem may result in more effective therapy. Serial examinations with several radiopharmaceuticals represent the best nuclear approach to the transplant patient. This paper describes the application and performance of these tests as currently performed at Henry Ford Hospital

Interferometric differentiation between resonant Coherent Anti-Stokes Raman Scattering and nonresonant four-wave-mixing processes

A major impediment of using Coherent Anti-Stokes Raman Scattering to identify biological molecules is that the illumination levels required to produce a measurable signal often also produce significant nonresonant background from the medium, especially from water, that is not specific to the resonance being investigated. We present a method of using nonlinear interferometry to measure the temporal shape of the anti-Stokes signal to differentiate which components are resonant and nonresonant. This method is easily adaptable to most existing pulsed CARS illumination methods and should allow for distinguishing resonant CARS when using higher energy pulses. By examining the differences between signals produced by acetone and water, we show that the resonant and nonresonant signals can be clearly differentiated.Comment: 8 pages, 4 figure

Clinical Notes: 201Tl Chloride Uptake by Non-Hodgkins Lymphoma: Radiographic Exhibit

This report describes intense uptake of 201Tl in a patient with histiocytic lymphoma. The activity seen was greater than with 67Ga. Use of 201Tl as an alternative imaging agent is advocated

Technetium pyrophosphate myocardial scanning in acute myocardial infarction

Technetium 99m pyrophosphate (99mTCPyP) accumulates in recently infarcted myocardium and can be detected by external imaging techniques. This study was performed to evaluate the ability of this isotope to identify the presence of acute myocardial infarction. In 82 patients admitted to a coronary care unit with chest pain of varying etiology, scan was positive in all 13 patients with acute transmural myocardial infarction and in 23 of 27 patients with nontransmural myocardial infarction. The scan was negative in 37 of 42 patients without evidence of recent infarction. Four of the remaining five patients in this group had unstable angina pectoris. The authors believe TCPyP myocardial scanning is an easy, noninvasive, and highly reliable test for detection of acute myocardial infarction when performed within seven days of the onset of chest pain. The method has particular significance when standard diagnostic aids are difficult to interpret. It was also extremely helpful in substantiating the diagnosis of nontransmural infarction

Neutron Correlations in the Decay of the First Excited State of 11Li

The decay of unbound excited 11Li was measured after being populated by a two-proton removal from a 13B beam at 71 MeV/nucleon. Decay energy spectra and Jacobi plots were obtained from measurements of the momentum vectors of the 9Li fragment and neutrons. A resonance at an excitation energy of ∼1.2 MeV was observed. The kinematics of the decay are equally well fit by a simple dineutron-like model or a phase-space model that includes final state interactions. A sequential decay model can be excluded

Gain-of-Function Experiments With Bacteriophage Lambda Uncover Residues Under Diversifying Selection in Nature

Viral gain-of-function mutations frequently evolve during laboratory experiments. Whether the specific mutations that evolve in the lab also evolve in nature and whether they have the same impact on evolution in the real world is unknown. We studied a model virus, bacteriophage λ, that repeatedly evolves to exploit a new host receptor under typical laboratory conditions. Here, we demonstrate that two residues of λ’s J protein are required for the new function. In natural λ variants, these amino acid sites are highly diverse and evolve at high rates. Insertions and deletions at these locations are associated with phylogenetic patterns indicative of ecological diversification. Our results show that viral evolution in the laboratory mirrors that in nature and that laboratory experiments can be coupled with protein sequence analyses to identify the causes of viral evolution in the real world. Furthermore, our results provide evidence for widespread host-shift evolution in lambdoid viruses

A novel Streptococcus pneumoniae human challenge model demonstrates Treg lymphocyte recruitment to the infection site

To investigate local tissue responses to infection we have developed a human model of killed Streptococcus pneumoniae challenge by intradermal injection into the forearm. S. pneumoniae intradermal challenge caused an initial local influx of granulocytes and increases in TNF, IL6 and CXCL8. However, by 48 h lymphocytes were the dominant cell population, mainly consisting of CD4 and CD8 T cells. Increases in local levels of IL17 and IL22 and the high proportion of CD4 cells that were CCR6+ suggested a significant Th17 response. Furthermore, at 48 h the CD4 population contained a surprisingly high proportion of likely memory Treg cells (CCR6 positive and CD45RA negative CD4+CD25highCD127low cells) at 39%. These results demonstrate that the intradermal challenge model can provide novel insights into the human response to S. pneumoniae and that Tregs form a substantial contribution of the normal human lymphocyte response to infection with this important pathogen

Gain-of-Function Experiments With Bacteriophage Lambda Uncover Residues Under Diversifying Selection in Nature

Viral gain-of-function mutations frequently evolve during laboratory experiments. Whether the specific mutations that evolve in the lab also evolve in nature and whether they have the same impact on evolution in the real world is unknown. We studied a model virus, bacteriophage λ, that repeatedly evolves to exploit a new host receptor under typical laboratory conditions. Here, we demonstrate that two residues of λ’s J protein are required for the new function. In natural λ variants, these amino acid sites are highly diverse and evolve at high rates. Insertions and deletions at these locations are associated with phylogenetic patterns indicative of ecological diversification. Our results show that viral evolution in the laboratory mirrors that in nature and that laboratory experiments can be coupled with protein sequence analyses to identify the causes of viral evolution in the real world. Furthermore, our results provide evidence for widespread host-shift evolution in lambdoid viruses