RESUMO
Bacterial infection is one of the vital sources of morbidity and mortality. The development of single photon emission computed tomography [SPECT] radiotracer agents using antibiotics, for targeting in-vivo bacteria, helps in antibiotic dose calibration, targeted infection therapy and reduction in mortality rate. The aim of this study was to appraised [99m]Tc-labeling sulfadiazine as a radiopharmaceutical for bacillus infections imaging. Radiolabeling of sulfadiazine with technetium-99m was carried out by subsequent addition of 1.5 mL aqueous solution of sulfadiazine [1mg/mL], 120Mug stannous tartrate, gentistic acid as stabilizing agent and 185 MBq normal saline solution of 99mTcO4 -1 [pertechnetate] at pH = 5. The reaction mixture was incubated for 40 min at room temperature with light stirring. The quality control analysis [ITLC-SG and paper chromatography analysis] revealed 98% labeling yield. Biodistribution and scintigraphic study was carried using bacillus bacterial infection induced New Zealand white rabbits. Due to the ease of [99m]Tc-sulfadiazine conjugation method, high labeling efficiency, shelf stability [>95% up to 6h], blood serum stability [90% up to 6h] and high uptake in the infected muscle [T/NT =2.21 at 1h], [99m]Tc-SDZ could be used as radiopharmaceutical of choice for further pre-clinical and clinical studies
RESUMO
Benzylpenicillin acts through binding with beta-lactamase enzyme and inhibiting the bacterial cell wall biosynthesis. Therefore, the radiolabeling of benzylpenicillin with lutetium-177 is expected to serve as a theranostic agent for deep-seated bacterial infections. The radiolabeling of benzylpenicillin resulted tilde 93% radiochemical yield at optimized reaction conditions. Radiochemical purity analysis was tested with the help of Whatman No. 2 paper and instant thin layer chromatography. Biodistribution study with healthy New Zeeland white rabbit revealed moderate accumulation in different organs. Kidneys are the major organs, showed not more than 4.57+/-0.89% injected dose per gram organ [ID/gm organ] at 1 h time point and 3.48+/-1.11% ID/gm organ at 6 h time point. The accumulation of tracer agent in liver was found in the range of 7.42+/-2.42% to 9.09+/-2.76 ID/gm organ. The glomerular filtration rate studies revealed rapid clearance - omitting the chance of nephrotoxicity. The radiolabeling yield, biodistribution and glomerular filtration rate results revealed [177]Lu-benzylpencillin could be a potential candidate to diagnose the deep-seated bacterial infection
RESUMO
Double-hit lymphoma [DHL] has been identified as a subset of diffuse large B-cell lymphoma with poor clinical outcomes. It is because of genetic translocation of C-myc and Bc12 gene that make it more aggressive and un-responsive to conventional and salvage treatments. DHL is an extremely rare entity of non-Hodgkin's lymphoma [NHL] having no established incidence data so far. In literature very limited data is available to guide therapeutic decisions and despite aggressive chemotherapy followed by autologus hematopoietic cell transplantation, outcomes still remain poor. Herein, we report a case of 82-year Pakistani patient who presented with left groin lump. Incision biopsy established the diagnosis of DHL. Despite intensive course of standard chemotherapy and radiation therapy, he died with progression of disease
RESUMO
Klippel-Trenaunay Syndrome [KTS] is a rare, congenital, vascular disorder affecting one or more limbs. Originally, it was defined as a triad including port wine stain, varicose veins and bony and soft tissue hypertrophy. We present a case of a 20-year-old female who walked with a limp. Because of swelling of right leg she was sent for Doppler study which picked up dilated arteries and increased blood flow velocity. The impression of KTS was further strengthened by unique nuclear medicine and radiological findings