Correction: Rapid and robust antibody Fab fragment crystallization utilizing edge-to-edge beta-sheet packing

SummaryThe accepted golden standard for detection of inflammatory bone disease is conventional three-phase bone scanning. Hyperperfusion, a high blood-pool activity and elevated bone metabolism are typical signs for an acute osteomyelitis. However, in case of subacute, chronic inflammation, neither elevated blood flow nor high blood-pool activity may be seen. This may cause difficulties in differentiating such cases from neoplastic or postoperative changes. This case report verifies the possible advantage of immunoscintigraphy with Tc-99m-labelled antigranulocyte Fab′-fragments (LeukoScan®) in a patient with infected mandibular osteoradionecrosis, who had equivocal clinical symptomes and questionable radiographic results. LeukoScan® is shown to be more sensitive in case of subacute bone inflammation compared with three-phase bone scanning. However, acquisition of delayed images after 24 hours including SPECT is inevitable in case of negative scans during the first hours of investigation.

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Anti-thrombotic Effect of a PAI-1 Inhibitor in Rats Given Endotoxin

Thrombosis and Haemostasis ◽

10.1055/s-0038-1650231 ◽

1996 ◽

Vol 75 (01) ◽

pp. 118-126 ◽

Cited By ~ 27

Author(s):

T Abrahamsson ◽

V Nerme ◽

M Strömqvist ◽

B Åkerblom ◽

A Legnehed ◽

...

Keyword(s):

Plasminogen Activator Inhibitor ◽

Rat Plasma ◽

Clot Lysis ◽

Fibrin Deposition ◽

Plasminogen Activator Inhibitor 1 ◽

Fab Fragment ◽

Dose Dependent Decrease ◽

Pai 1

SummaryThe aim of this study was to investigate the anti-thrombotic effects of an inhibitor of the plasminogen activator inhibitor-1 (PAI-1) in rats given endotoxin. In studies in vitro, PRAP-1, a Fab-fragment of a polyclonal antibody against human PAI-1, was shown to inhibit PAI-1 activity in rat plasma as well as to stimulate clot-lysis of the euglobulin fraction derived from rat plasma. Endotoxin administered to anaesthetised rats produced a marked increase in plasma PAI-1 activity. To study fibrin formation and lysis in vivo after intravenous (i. v.) injection of the coagulant enzyme batroxobin, 125I-fibrinogen was administered to the animals. The thrombi formed by batroxobin were rapidly lysed in control animals, while the rate of lysis was markedly attenuated in rats given endotoxin. PRAP-1 was administered i.v. (bolus + infusion) to rats given endotoxin and batroxobin and the PAI-1 inhibitor caused a dose-dependent decrease in the 125I-fibrin deposition in the lungs. An immunohistochemical technique was used to confirm this decrease in density of fibrin clots in the tissue. Furthermore, PRAP-1 decreased plasma PAI-1 activity in the rats and this reduction was correlated to the decrease in lung 125I-fibrin deposition at the corresponding time point. It is concluded that in this experimental model the PAI-1 antibody PRAP-1 may indeed inhibit thrombosis in animals exposed to endotoxin.

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