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1.
Bull Exp Biol Med ; 170(4): 415-419, 2021 Feb.
Article in English | MEDLINE | ID: mdl-33713227

ABSTRACT

We studied an original radiolabeled complex of antimicrobial peptides UBI29-41 and UBI18-35, ubiquicidin derivatives, for distinguishing between bacterial and aseptic inflammation. For radiolabeling of the peptides with technetium-99m, a bifunctional chelating agent succinimide-1-yl 6-(bis(pyridin-2-ylmethyl)amino)hexanoate was used. The obtained complexes 99mТс-DPAH-UBI29-41 and 99mТс-DPAH-UBI18-35 had radiolabeling yield >80% and radiochemical purity >96%. Accumulation of the complexes in the focus of bacterial inflammation in bone structures and the absence of this complex in the site of aseptic inflammation was confirmed in a rat model of traumatic osteomyelitis by single-photon emission computed tomography.


Subject(s)
Osteomyelitis/drug therapy , Pore Forming Cytotoxic Proteins/chemistry , Ribosomal Proteins/chemistry , Technetium/chemistry , Animals , Diagnosis, Differential , Female , Rats , Rats, Wistar , Tomography, Emission-Computed, Single-Photon
2.
Bull Exp Biol Med ; 161(1): 137-40, 2016 May.
Article in English | MEDLINE | ID: mdl-27259493

ABSTRACT

A model of traumatic osteomyelitis in rats is created. The disease development was evaluated by bone marrow myelograms, results of scintigraphy, and histological studies.


Subject(s)
Femur/injuries , Osteomyelitis/pathology , Animals , Animals, Outbred Strains , Bone Marrow/immunology , Bone Marrow/pathology , Disease Models, Animal , Femur/immunology , Femur/pathology , Male , Osteomyelitis/etiology , Osteomyelitis/immunology , Rats
3.
Vestn Rentgenol Radiol ; (6): 24-9, 2015.
Article in Russian | MEDLINE | ID: mdl-26999931

ABSTRACT

OBJECTIVE: To give the results of a software-based hybrid single photon emission computed tomography/magnetic resonance imaging (SPECT/MRI) in detecting osteomyelitis (OM) in patients with diabetic foot syndrome (DFS). MATERIAL AND METHODS: Seventy-six patients (35 men and 41 women) (mean age, 59.4 +/- 7.1 years) with type 1 and 2 diabetes mellitus and suspected OM were examined. The investigation enrolled patients with neuropathic (n = 25), ischemic (n = 13), and mixed (n = 38) DFS. All the patients underwent (99m)Tc-HMPAO/ (99m)Tc-technefit labeled leukocyte scintigraphy; magnetic resonance imaging was performed in 30 patients. The results were combined using RView 9.06 software (Colin Studholme). RESULTS: Labeled leukocyte SPECT to Diagnose OM yielded 255 true positive (TP), 38 true negative (TN), 12 false negative (FP), and 1 false negative (FN) results. The accuracy of the technique was 82.9%. The FP results were due to the low resolution of the technique and to the small sizes of the object under study. One FN result was detected in a patient with ischemic DFS because of reduced blood flow. MRI to identify OM in patients with DFS provided 20 TP, 16 TN, 4 FP, and 2 FN results. Its diagnostic accuracy was 85.7%. The relative low specificity of MRI was associated with the presence of FP results due to the complexity of differential diagnosis of bone marrow edema and inflammatory infiltration. Assessing 42 hybrid SPECT/MR-images revealed 21 TP, 17 TN, 3 FP, and I FN results. The diagnostic accuracy was equal to 95.9%. CONCLUSION: Thus, comparing MRI (90.9% sensitivity and 80.0% specificity), labeled leukocyte scintigraphy (96.2% sensitivity and 76.0% specificity), and hybrid SPECT/MRI (95.5% sensitivity and 85.0% specificity) showed the high diagnostic efficiency of the latter.


Subject(s)
Diabetic Foot/diagnosis , Magnetic Resonance Imaging/methods , Osteomyelitis/diagnosis , Radionuclide Imaging/methods , Technetium Tc 99m Exametazime/pharmacology , Tomography, Emission-Computed, Single-Photon/methods , Aged , Comparative Effectiveness Research , Diabetic Foot/complications , Female , Humans , Image Interpretation, Computer-Assisted , Male , Middle Aged , Osteomyelitis/etiology , Radiopharmaceuticals/pharmacology , Sensitivity and Specificity
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