18F-fluorodeoxyglucose positron emission tomography/computed tomography enables the detection of recurrent same-site deep vein thrombosis by illuminating recently formed, neutrophil-rich thrombus

Tetsuya Hara, Jessica Truelove, Ahmed Tawakol, Gregory R Wojtkiewicz, William J Hucker, Megan H MacNabb, Anna-Liisa Brownell, Kimmo Jokivarsi, Chase W Kessinger, Michael R Jaff, Peter K Henke, Ralph Weissleder, Farouc A Jaffer, Tetsuya Hara, Jessica Truelove, Ahmed Tawakol, Gregory R Wojtkiewicz, William J Hucker, Megan H MacNabb, Anna-Liisa Brownell, Kimmo Jokivarsi, Chase W Kessinger, Michael R Jaff, Peter K Henke, Ralph Weissleder, Farouc A Jaffer

Abstract

Background: Accurate detection of recurrent same-site deep vein thrombosis (DVT) is a challenging clinical problem. Because DVT formation and resolution are associated with a preponderance of inflammatory cells, we investigated whether noninvasive (18)F-fluorodeoxyglucose (FDG)-positron emission tomography (PET) imaging could identify inflamed, recently formed thrombi and thereby improve the diagnosis of recurrent DVT.

Methods and results: We established a stasis-induced DVT model in murine jugular veins and also a novel model of recurrent stasis DVT in mice. C57BL/6 mice (n=35) underwent ligation of the jugular vein to induce stasis DVT. FDG-PET/computed tomography (CT) was performed at DVT time points of day 2, 4, 7, 14, or 2+16 (same-site recurrent DVT at day 2 overlying a primary DVT at day 16). Antibody-based neutrophil depletion was performed in a subset of mice before DVT formation and FDG-PET/CT. In a clinical study, 38 patients with lower extremity DVT or controls undergoing FDG-PET were analyzed. Stasis DVT demonstrated that the highest FDG signal occurred at day 2, followed by a time-dependent decrease (P<0.05). Histological analyses demonstrated that thrombus neutrophils (P<0.01), but not macrophages, correlated with thrombus PET signal intensity. Neutrophil depletion decreased FDG signals in day 2 DVT in comparison with controls (P=0.03). Recurrent DVT demonstrated significantly higher FDG uptake than organized day 14 DVT (P=0.03). The FDG DVT signal in patients also exhibited a time-dependent decrease (P<0.01).

Conclusions: Noninvasive FDG-PET/CT identifies neutrophil-dependent thrombus inflammation in murine DVT, and demonstrates a time-dependent signal decrease in both murine and clinical DVT. FDG-PET/CT may offer a molecular imaging strategy to accurately diagnose recurrent DVT.

Keywords: fluorodeoxyglucose F18; inflammation; neutrophils; positron-emission tomography; venous thrombosis.

© 2014 American Heart Association, Inc.

Figures

Figure 1
Figure 1
Induction of stasis-induced DVT model in the murine jugular vein. (A) Surgical ligation of the right jugular vein was performed to induce deep vein thrombosis (DVT). As a sham control, the left jugular vein was surgically exposed and loosely tied without constriction. (B) Contrast-enhanced computed tomography (CT) venography shows a filling defect only in the right jugular vein with DVT (dark signal, yellow arrow). Surgery-induced air artifact was observed in front of ligated jugular vein (asterisk). (C) Resected red-white thrombus in the ligated jugular vein. (D) Hematoxylin-eosin stain. (E) Carstairs’ stain (red = fibrin, yellow = erythrocytes, blue = collagen). Representative DVT images at day 0 (A) and day 4 (B-E). Scale bars, 500 μm.
Figure 2
Figure 2
FDG-PET enhances acute DVT in mice. Representative images of (A) FDG-PET (B) contrast-enhanced CT venography, and (C) fused PET/CT at various timepoints. DVT (yellow arrow) induced filling defects in contrast CT venography not seen in the contralateral sham-operated vein (white arrow). Surgery-induced air artifact (dark signal) is observed anterior to each vein on CT (white asterisk). FDG-PET DVT signal was elevated in acute DVT, and diminished over time. Mild surgery-induced inflammation at wound healing region was observed in the sham surgery left jugular vein region at day 2.
Figure 3
Figure 3
Time-course quantitative changes of FDG signal in DVT. (A) Standard uptake value (SUV), (B) SUVmax , (C) target-to-background ratio (TBR), and (D) %injected dose per gram of tissue (%IDGT) showed a similar trend (p<0.05) in that values were highest at day 2 and significantly decreased over time (4-5 mice per group). (E and F) Subset of mice underwent serial PET imaging at day 2, 7, and 14. FDG accumulation in DVT (yellow arrow, sham control white arrow) demonstrated a time-dependent significant decrease (p=0.03). *p<0.05, **p<0.01, ***p<0.001. (Box-and-Whisker plot) Middle line represents median value, box indicates interquartile range (25th–75th percentiles), and range bars show maximum and minimum.
Figure 4
Figure 4
Recruitment of inflammatory cells into DVT. (A) Representative immunostaining of neutrophil and macrophage from various DVT timepoints. Neutrophils are abundant and predominate in early day 2-4 DVT. Thrombus macrophages were evident from day 7 and resided at the outer DVT edge. (B) The number of neutrophils (black) and macrophages (white) per 5 HPF (high power field) were shown. (*p

Figure 5

FDG signal associations with thrombus…

Figure 5

FDG signal associations with thrombus neutrophils and macrophages. (A) The number of thrombus…

Figure 5
FDG signal associations with thrombus neutrophils and macrophages. (A) The number of thrombus neutrophils correlated with the FDG uptake in DVT (SUV; r=0.41, p=0.004, TBR; r=0.62, p

Figure 6

Experimental neutropenia reduces FDG signal…

Figure 6

Experimental neutropenia reduces FDG signal within DVT. (A) Representative images of contrast-enhanced CT…

Figure 6
Experimental neutropenia reduces FDG signal within DVT. (A) Representative images of contrast-enhanced CT and fused PET/CT from neutropenic mice (left) and uninjected control (right) are shown. DVT (yellow arrow) and sham-operated jugular vein (white arrow) are indicated by arrows. (B) SUV, SUVmax, and TBR of FDG signal of DVT in neutropenic mice are significantly lower than control mice (*p<0.05). N=4 per group. Median SUV and SUVmax value of sham-operated contralateral jugular veins are shown as respective dotted lines.

Figure 7

Establishment of a novel recurrent…

Figure 7

Establishment of a novel recurrent DVT model, and specific detection of recurrent DVT…

Figure 7
Establishment of a novel recurrent DVT model, and specific detection of recurrent DVT by FDG-PET/CT. (A) Two days after the initial ligation, the suture was de-ligated and removed. At day 14, re-ligation was performed at previously ligated site to induce a recurrent DVT. Histological images of resected recurrent DVT (day 2 recurrent DVT (outlined with black dotted line) overlying the day 16 DVT (outlined with blue dotted line)) are shown. (B) Hematoxylin-eosin, (C) Carstairs’ staining, and (D) Masson Trichrome staining shows red blood cell-rich zones in recurrent DVT (red in H&E and yellow in Carstairs’) and collagen-rich zones in older DVT (pink in H&E and blue in Carstairs’ and Masson). (E and F) Immunostaining of neutrophils (E) and macrophages (F) shows the newly formed recurrent DVT is neutrophil-rich, while the older primary DVT shows macrophage predominance. Representative (G) PET, (H) CT, and (I) PET/CT images are shown. FDG enhanced recurrent DVT substantially more than older DVT (G and I). (J-L) FDG signal was significantly higher in recurrent DVT (day 2 overlying the day 16 DVT) than in older day 14 DVT in the contralateral vein. N=6 per group. Scale bar, 500 μm.

Figure 8

18 F-FDG DVT signal is…

Figure 8

18 F-FDG DVT signal is elevated in patients and diminishes over time. Representative…
Figure 8
18F-FDG DVT signal is elevated in patients and diminishes over time. Representative PET/CT images from (A) a patient with DVT and (B) a matched control patient without DVT. Elevated FDG signal was observed in the thrombosed femoral vein (A, yellow arrow). (C) The SUVmax and (D) TBR of the DVT exhibited a time-dependent decrease (p=0.002 for SUVmax, p=0.004 for TBR, n=6-7 per DVT group). FDG uptake in the DVT vein was shown for individuals grouped according to age of the DVT, divided into tertiles. Values from the matched vein from control patients are shown in the No DVT group (n=19 patients).
All figures (8)
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    1. Go AS, Mozaffarian D, Roger VL, Benjamin EJ, Berry JD, Borden WB, Bravata DM, Dai S, Ford ES, Fox CS, Franco S, Fullerton HJ, Gillespie C, Hailpern SM, Heit JA, Howard VJ, Huffman MD, Kissela BM, Kittner SJ, Lackland DT, Lichtman JH, Lisabeth LD, Magid D, Marcus GM, Marelli A, Matchar DB, McGuire DK, Mohler ER, Moy CS, Mussolino ME, Nichol G, Paynter NP, Schreiner PJ, Sorlie PD, Stein J, Turan TN, Virani SS, Wong ND, Woo D, Turner MB. Heart disease and stroke statistics--2013 update: a report from the american heart association. Circulation. 2013;127:e6–e245. - PMC - PubMed
    1. Jaff MR, McMurtry MS, Archer SL, Cushman M, Goldenberg N, Goldhaber SZ, Jenkins JS, Kline JA, Michaels AD, Thistlethwaite P, Vedantham S, White RJ, Zierler BK. Management of massive and submassive pulmonary embolism, iliofemoral deep vein thrombosis, and chronic thromboembolic pulmonary hypertension: a scientific statement from the American Heart Association. Circulation. 2011;123:1788–1830. - PubMed
    1. Kyrle PA, Eichinger S. Deep vein thrombosis. Lancet. 2005;365:1163–1174. - PubMed
    1. Baglin T, Luddington R, Brown K, Baglin C. Incidence of recurrent venous thromboembolism in relation to clinical and thrombophilic risk factors: prospective cohort study. Lancet. 2003;362:523–526. - PubMed
    1. Bates SM, Jaeschke R, Stevens SM, Goodacre S, Wells PS, Stevenson MD, Kearon C, Schunemann HJ, Crowther M, Pauker SG, Makdissi R, Guyatt GH. Diagnosis of DVT: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines. Chest. 2012;141:e351S–418S. - PMC - PubMed
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Figure 5
Figure 5
FDG signal associations with thrombus neutrophils and macrophages. (A) The number of thrombus neutrophils correlated with the FDG uptake in DVT (SUV; r=0.41, p=0.004, TBR; r=0.62, p

Figure 6

Experimental neutropenia reduces FDG signal…

Figure 6

Experimental neutropenia reduces FDG signal within DVT. (A) Representative images of contrast-enhanced CT…

Figure 6
Experimental neutropenia reduces FDG signal within DVT. (A) Representative images of contrast-enhanced CT and fused PET/CT from neutropenic mice (left) and uninjected control (right) are shown. DVT (yellow arrow) and sham-operated jugular vein (white arrow) are indicated by arrows. (B) SUV, SUVmax, and TBR of FDG signal of DVT in neutropenic mice are significantly lower than control mice (*p<0.05). N=4 per group. Median SUV and SUVmax value of sham-operated contralateral jugular veins are shown as respective dotted lines.

Figure 7

Establishment of a novel recurrent…

Figure 7

Establishment of a novel recurrent DVT model, and specific detection of recurrent DVT…

Figure 7
Establishment of a novel recurrent DVT model, and specific detection of recurrent DVT by FDG-PET/CT. (A) Two days after the initial ligation, the suture was de-ligated and removed. At day 14, re-ligation was performed at previously ligated site to induce a recurrent DVT. Histological images of resected recurrent DVT (day 2 recurrent DVT (outlined with black dotted line) overlying the day 16 DVT (outlined with blue dotted line)) are shown. (B) Hematoxylin-eosin, (C) Carstairs’ staining, and (D) Masson Trichrome staining shows red blood cell-rich zones in recurrent DVT (red in H&E and yellow in Carstairs’) and collagen-rich zones in older DVT (pink in H&E and blue in Carstairs’ and Masson). (E and F) Immunostaining of neutrophils (E) and macrophages (F) shows the newly formed recurrent DVT is neutrophil-rich, while the older primary DVT shows macrophage predominance. Representative (G) PET, (H) CT, and (I) PET/CT images are shown. FDG enhanced recurrent DVT substantially more than older DVT (G and I). (J-L) FDG signal was significantly higher in recurrent DVT (day 2 overlying the day 16 DVT) than in older day 14 DVT in the contralateral vein. N=6 per group. Scale bar, 500 μm.

Figure 8

18 F-FDG DVT signal is…

Figure 8

18 F-FDG DVT signal is elevated in patients and diminishes over time. Representative…
Figure 8
18F-FDG DVT signal is elevated in patients and diminishes over time. Representative PET/CT images from (A) a patient with DVT and (B) a matched control patient without DVT. Elevated FDG signal was observed in the thrombosed femoral vein (A, yellow arrow). (C) The SUVmax and (D) TBR of the DVT exhibited a time-dependent decrease (p=0.002 for SUVmax, p=0.004 for TBR, n=6-7 per DVT group). FDG uptake in the DVT vein was shown for individuals grouped according to age of the DVT, divided into tertiles. Values from the matched vein from control patients are shown in the No DVT group (n=19 patients).
All figures (8)
Figure 6
Figure 6
Experimental neutropenia reduces FDG signal within DVT. (A) Representative images of contrast-enhanced CT and fused PET/CT from neutropenic mice (left) and uninjected control (right) are shown. DVT (yellow arrow) and sham-operated jugular vein (white arrow) are indicated by arrows. (B) SUV, SUVmax, and TBR of FDG signal of DVT in neutropenic mice are significantly lower than control mice (*p<0.05). N=4 per group. Median SUV and SUVmax value of sham-operated contralateral jugular veins are shown as respective dotted lines.
Figure 7
Figure 7
Establishment of a novel recurrent DVT model, and specific detection of recurrent DVT by FDG-PET/CT. (A) Two days after the initial ligation, the suture was de-ligated and removed. At day 14, re-ligation was performed at previously ligated site to induce a recurrent DVT. Histological images of resected recurrent DVT (day 2 recurrent DVT (outlined with black dotted line) overlying the day 16 DVT (outlined with blue dotted line)) are shown. (B) Hematoxylin-eosin, (C) Carstairs’ staining, and (D) Masson Trichrome staining shows red blood cell-rich zones in recurrent DVT (red in H&E and yellow in Carstairs’) and collagen-rich zones in older DVT (pink in H&E and blue in Carstairs’ and Masson). (E and F) Immunostaining of neutrophils (E) and macrophages (F) shows the newly formed recurrent DVT is neutrophil-rich, while the older primary DVT shows macrophage predominance. Representative (G) PET, (H) CT, and (I) PET/CT images are shown. FDG enhanced recurrent DVT substantially more than older DVT (G and I). (J-L) FDG signal was significantly higher in recurrent DVT (day 2 overlying the day 16 DVT) than in older day 14 DVT in the contralateral vein. N=6 per group. Scale bar, 500 μm.
Figure 8
Figure 8
18F-FDG DVT signal is elevated in patients and diminishes over time. Representative PET/CT images from (A) a patient with DVT and (B) a matched control patient without DVT. Elevated FDG signal was observed in the thrombosed femoral vein (A, yellow arrow). (C) The SUVmax and (D) TBR of the DVT exhibited a time-dependent decrease (p=0.002 for SUVmax, p=0.004 for TBR, n=6-7 per DVT group). FDG uptake in the DVT vein was shown for individuals grouped according to age of the DVT, divided into tertiles. Values from the matched vein from control patients are shown in the No DVT group (n=19 patients).

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