TY  - JOUR
A1  - Kann, Simone
A1  - Blessmann, Joerg
A1  - Winkelmann, Yvonne
A1  - Hansen, Jessica
A1  - Maya Amaya, Leonardo J.
A1  - Rivera Salcedo, Gadith E.
A1  - Halas, Hussein El
A1  - Schmidt‐Chanasit, Jonas
A1  - Keoviengkhone, Latdamone
A1  - Sopraseuth, Vatsana
A1  - Deschermeier, Christina
A1  - Mika, Angela
T1  - Dengue virus detection in Lao PDR and Colombia: Comparative evaluation of PCR tests
JF  - Tropical Medicine & International Health
N2  - Objectives
Dengue virus (DENV) detection by polymerase chain reaction (PCR) facilitates diagnosis of dengue fever, which is the most frequent arboviral disease globally. Two studies were performed in countries with high dengue incidence, to assess the diagnostic performance of different PCR techniques.
Methods/Results
Two hundred and seventy‐nine acute phase blood samples from febrile patients were analyzed for DENV by the RealStar Dengue RT‐PCR kit (Altona Diagnostics) as gold standard in comparison with the Tropical Fever Core multiplex PCR (Fast Track Diagnostics). In total, 102 samples collected in Savannakhet Province (Lao PDR, Southeast Asia) in 2013 and 35 samples from Valledupar (Colombia, South America) tested positive for DENV by RealStar RT‐PCR. In comparison, the Tropical Fever Core multiplex PCR detected 65.0% (65/102) and 68.6% (24/35) of these samples as positive for DENV in Savannakhet and Valledupar, respectively. Diagnostic sensitivity of the multiplex PCR strongly correlated with viral load. A subset of DENV PCR‐confirmed samples was additionally tested by BNITM in house Dengue Type RT‐PCR in comparison with two commercial test kits (RealStar Dengue Type RT‐PCR [Altona Diagnostics], Dengue differentiation PCR [Fast Track Diagnostics]). The leading dengue serotype in Savannakhet was DENV‐3 (58% [29/50]), while DENV‐1 (53.8% [14/26]) was the predominant serotype found in samples collected in Valledupar by BNITM‐type PCR. However, three DENV serotypes were circulating in Valledupar and in Savannakhet. In 2015, additional studies found predominantly DENV‐4 (71% [12/17]) in Savannakhet.
Conclusions
Both studies emphasized that routine diagnostics in both regions will benefit from an expanded use of highly sensitive pan‐dengue PCRs.
KW  - Colombia
KW  - dengue infections
KW  - dengue serotypes
KW  - Lao PDR
KW  - PCR diagnostics
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-262703
VL  - 26
IS  - 10
SP  - 1296
EP  - 1302
ER  - 
TY  - JOUR
A1  - Colvill, Emma
A1  - Booth, Jeremy
A1  - Nill, Simeon
A1  - Fast, Martin
A1  - Bedford, James
A1  - Oelfke, Uwe
A1  - Nakamura, Mitsuhiro
A1  - Poulsen, Per
A1  - Worm, Esben
A1  - Hansen, Rune
A1  - Ravkilde, Thomas
A1  - Rydhög, Jonas Scherman
A1  - Pommer, Tobias
A1  - af Rosenschold, Per Munck
A1  - Lang, Stephanie
A1  - Guckenberger, Matthias
A1  - Groh, Christian
A1  - Herrmann, Christian
A1  - Verellen, Dirk
A1  - Poels, Kenneth
A1  - Wang, Lei
A1  - Hadsell, Michael
A1  - Sothmann, Thilo
A1  - Blanck, Oliver
A1  - Keall, Paul
T1  - A dosimetric comparison of real-time adaptive and non-adaptive radiotherapy: a multi-institutional study encompassing robotic, gimbaled, multileaf collimator and couch tracking
JF  - Radiotherapy and Oncology
N2  - Purpose: A study of real-time adaptive radiotherapy systems was performed to test the hypothesis that, across delivery systems and institutions, the dosimetric accuracy is improved with adaptive treatments over non-adaptive radiotherapy in the presence of patient-measured tumor motion. Methods and materials: Ten institutions with robotic(2), gimbaled(2), MLC(4) or couch tracking(2) used common materials including CT and structure sets, motion traces and planning protocols to create a lung and a prostate plan. For each motion trace, the plan was delivered twice to a moving dosimeter; with and without real-time adaptation. Each measurement was compared to a static measurement and the percentage of failed points for gamma-tests recorded. Results: For all lung traces all measurement sets show improved dose accuracy with a mean 2%/2 mm gamma-fail rate of 1.6% with adaptation and 15.2% without adaptation (p < 0.001). For all prostate the mean 2%/2 mm gamma-fail rate was 1.4% with adaptation and 17.3% without adaptation (p < 0.001). The difference between the four systems was small with an average 2%/2 mm gamma-fail rate of <3% for all systems with adaptation for lung and prostate. Conclusions: The investigated systems all accounted for realistic tumor motion accurately and performed to a similar high standard, with real-time adaptation significantly outperforming non-adaptive delivery methods.
KW  - Robotic tracking
KW  - Gimbaled tracking
KW  - MLC tracking
KW  - Couch tracking
KW  - Organ motion
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-189605
VL  - 119
IS  - 1
ER  - 
TY  - JOUR
A1  - Griebsch, Nora-Isabell
A1  - Kern, Johanna
A1  - Hansen, Jonas
A1  - Rullmann, Michael
A1  - Luthardt, Julia
A1  - Helfmeyer, Stephanie
A1  - Dekorsy, Franziska J.
A1  - Soeder, Marvin
A1  - Hankir, Mohammed K.
A1  - Zientek, Franziska
A1  - Becker, Georg-Alexander
A1  - Patt, Marianne
A1  - Meyer, Philipp M.
A1  - Dietrich, Arne
A1  - Blüher, Matthias
A1  - Ding, Yu-Shin
A1  - Hilbert, Anja
A1  - Sabri, Osama
A1  - Hesse, Swen
T1  - Central serotonin/noradrenaline transporter availability and treatment success in patients with obesity
JF  - Brain Sciences
N2  - Serotonin (5-hydroxytryptamine, 5-HT) as well as noradrenaline (NA) are key modulators of various fundamental brain functions including the control of appetite. While manipulations that alter brain serotoninergic signaling clearly affect body weight, studies implicating 5-HT transporters and NA transporters (5-HTT and NAT, respectively) as a main drug treatment target for human obesity have not been conclusive. The aim of this positron emission tomography (PET) study was to investigate how these central transporters are associated with changes of body weight after 6 months of dietary intervention or Roux-en-Y gastric bypass (RYGB) surgery in order to assess whether 5-HTT as well as NAT availability can predict weight loss and consequently treatment success. The study population consisted of two study cohorts using either the 5-HTT-selective radiotracer [\(^{11}\)C]DASB to measure 5-HTT availability or the NAT-selective radiotracer [\(^{11}\)C]MRB to assess NAT availability. Each group included non-obesity healthy participants, patients with severe obesity (body mass index, BMI, >35 kg/m\(^2\)) following a conservative dietary program (diet) and patients undergoing RYGB surgery within a 6-month follow-up. Overall, changes in BMI were not associated with changes of both 5-HTT and NAT availability, while 5-HTT availability in the dorsal raphe nucleus (DRN) prior to intervention was associated with substantial BMI reduction after RYGB surgery and inversely related with modest BMI reduction after diet. Taken together, the data of our study indicate that 5-HTT and NAT are involved in the pathomechanism of obesity and have the potential to serve as predictors of treatment outcomes.
KW  - obesity
KW  - serotonin
KW  - noradrenaline
KW  - serotonin transporter
KW  - noradrenaline transporter
KW  - Roux-en-Y gastric bypass surgery
KW  - body mass index (BMI; kg/m\(^2\))
KW  - radiotracer
KW  - PET
KW  - PET imaging
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-290294
SN  - 2076-3425
VL  - 12
IS  - 11
ER  -