Objective To assess the efficacy of a kind of new material lipid magnetic particle for isolation and detection of lung cancer circulating tumor cells (CTCs). Methods Immune lipid magnetic particles were prepared with reverse evaporation method and they were assembled into kits with EpCAM and EGFR antibody respectively. Their efficacy were evaluated by detecting A549 cells in group A (A549 cells mixed in phosphated buffer solution) and group B (A549 cells mixed in blood from healthy volunteers). Lung cancer CTCs of hospitalized patients were also detected with both immune magnetic particals. Then the detecting efficacy was compared between EpCAM immune lipid magnetic particles and the conventional CellsearchTM system. Results The immune lipid magnetic particles had high capture efficiency for CTCs isolation and identification. The median of EpCAM immune lipid magnetic particles method in detecting A549 cells in group A was 92%, and EGFR was 90%. The median of EpCAM immune lipid magnetic particles method in detecting A549 cells in group B was 85%, and EGFR was 81%. In 13 patients with lung cancer, CTCs can be detected with both immune lipid magnetic particles methods and both medians were 5; In negative control, the medians of both methods were 0 (P＜0.05). EpCAM immune lipid magnetic particles method can detect more CTCs than conventional CellsearchTM system in 3 lung cancer patients. Conclusions Immune lipid magnetic particles have good efficacy for lung cancer CTCs detection and has promising clinical application value. The EpCAM immune lipid magnetic particles have equal efficiency in detecting lung cancer CTCs with EGFR. There is a trend that EpCAM immune lipid magnetic particles is superior to the conventional CellsearchTM system.
ObjectiveTo assess the efficiency, safety and long-term prognosis for interventional bronchoscopy in the treatment of trachea invasion by thyroid cancer. MethodsThe clinical data of forty-three patients with trachea invasion by thyroid cancer in Changhai Hospital from January 2006 to September 2015 were retrospectively analyzed. The trachea diameter and dyspnea score were compared before and after interventional treatment to explore the efficiency. The complications during and after therapy were observed. All patients were treated with interventional modalities including electrocautery, argon plasma coagulation, laser, cryotherapy, stent insertion or radioactive seeds implantation according to different invasion types, degree of stenosis and base situation. ResultsThe trachea diameter increased from (3.9±1.5)mm to (10.6±0.6)mm after bronchoscopy therapy (t=-17.314, P < 0.000 1). The dyspnea score decreased from 3.3±0.7 to 2.3±0.7 after bronchoscopy therapy (t=9.274, P < 0.000 1). The complications during therapy included haemorrhage (46.5%), vocal cord paralysis (4.7%) and glottis edema (7.0%). The restenosis rate in the patients with stent insertion was 26.7%. Thirty-seven patients were followed up successfully, and the medium survival time for follow-up patients was 27 months. The univariate and multivariate analysis indicated that the kind of interventional modalities used for therapy was an independent prognostic factor of survival (HR=0.261, P=0.036). The medium survival time for the patients treated with≥3 methods, 2 methods and 1 method was 47 months, 36 months and 13 months, respectively. ConclusionsFor trachea invasion by thyroid cancer, bronchoscopic therapy can effectively relieve airway obstruction and dyspnea symptom. Combination of multiple interventional modalities could have a favorable prognosis after treatment.