Objective In order to extrapolate the respiratory dysfunction of patients in early stage of acute organophosphorus pesticide poisoning (AOPP),transpulmonary thermodilution technique was used in swine models of severe acute dichlorvos poisoning (SADP) to evaluate respiratory function.Methods Twenty healthy female swine were randomly divided into dichlorvos ( n =7 ),atropine ( n =7 ) and control (n =6) groups.In the dichlorvos group,the swine were administered with 80％ emulsified dichlorvos (100mg/kg) via the gastric tube toinduce SADP.In the atropine group,swinewere administered with dichlorvos,and 0.5h later,atropine was injected to obtain and maintain atropinization.The swine of control group were administered with saline solution instead.Arterial and venous blood samples were collected 0,0.5,1,2,4 and 6 hours after modeling for blood gas analysis and detecting acetylcholinesterase levels.Both extravascular lung water index (EVLWI) and pulmonary vascular permeability index ( PVPI ) were measured by using PiCCO (pulse indicator continuous cardiac output ). At the termination of the experiment,the animals were sacrificed and the lung wet/dry weight ratio was determined and histopathological changes of lung tissue were also observed under microscope.Results In the dichlorvos group,EVLWI and PVPI were substantially increased from 0.5 h to 6 h after modeling but PaO2/FiO2 decreased from 0-6 h after modeling.In the atropine group,EVLWI and PVPI increased initially,but then they decreased 1 h afterwards and PaO2/FiO2 was also gradually decreased from 0-1 h.In both dichlorvos group and atropine group,the EVLWI was negatively correlated with PO2/FiO2 and positively correlated with PVPI.Compared with the control group,the lung wet/dry weight ratio increased markedly in the dichlorvos group and mildly increased in the atropine group.Meanwhile,the histopathological changes of lung tissue were obvious in the dichlorvos group and mild in the atropine group.Conclusions SADP swine experienced substantial changes in respiratory function. EVLWI was a reliable and valuable indicator for evaluating respiratory function in the early stage of AOPP.

Porcine alveolar macrophages (PAMs) represent the first line of defense in the porcine lung after infection with porcine circovirus type 2 (PCV2) via the respiratory tract. However, PCV2 infection impairs the microbicidal capability of PAMs and alters cytokine production and/or secretion. At present, the reason for the imbalance of cytokines has not been fully elucidated, and the regulatory mechanisms involved are unclear. In this study, we investigated the expression levels and regulation of interleukin-1beta (IL-1β) and IL-10 in PAMs following incubation with PCV2 in vitro. Levels of IL-1β and IL-10 increased in PAM supernatants, and the distribution of nuclear factor kappa B (NF-κB) p65 staining in nucleus, expression of MyD88 and p-IκB in cytoplasm, and DNA-binding activity of NF-κB increased after incubation with PCV2, while p65 expression in PAM cytoplasm decreased. However, when PAMs were co-incubated with PCV2 and small interfering RNA targeting MyD88, those effects were reversed. Additionally, mRNA expression levels of Toll-like receptors (TLR)-2, -3, -4, -7, -8, and -9 increased when PAMs were incubated with PCV2. These results show that PCV2 induces increased IL-1β and IL-10 production in PAMs, and these changes in expression are related to the TLR–MyD88–NF-κB signaling pathway.
Circovirus* ; Cytokines ; Cytoplasm ; In Vitro Techniques* ; Interleukin-10* ; Interleukin-1beta* ; Lung ; Macrophages, Alveolar* ; NF-kappa B ; Respiratory System ; RNA, Messenger ; RNA, Small Interfering ; Toll-Like Receptors

OBJECTIVETo investigate the outcomes of autologous stem cell transplantation (ASCT) for patients with aggressive peripheral T-cell lymphoma (PTCLs) in advanced stage.

METHODSThe clinical data of 25 patients in complete remission (CR) with aggressive PTCLs received ASCT from May 1997 to June 2013 were retrospectively analyzed.

RESULTS① Of the 25 cases, 16 were unspecified PTCL (PTCL-U), 4 with angioimmunoblastic T cell lymphoma (AITL), 3 with anaplastic large cell lymphoma (ALCL) and 2 with hepatosplenic T cell lymphoma (HSTL), with a median age of 30(12-54) years old. Ratio of male to female is 16∶9. The distribution of stages was 8 cases with stage Ⅲ and 17 patients with stage Ⅳ. Nine patients presented with bone marrow involvement. Before ASCT, 18 patients were in CR1 and 7 patients were in CR2. ②Two patients with HSTL in stage ⅣB and IPI score 4/5 in CR1 relapsed and died within 12 months after ASCT. At a median follow-up of 38 (range 14-110) months, the estimated 3-year probability of PFS and OS for the other 23 patients was (63.1 ± 10.5)% and (71.8 ± 9.9)%, respectively. The patients in first CR had a better survival than the patients in second CR. The 3-year probability of PFS were (74.9 ± 11.0)% vs (33.3 ± 19.2)% (P=0.092) and OS were (80.2 ± 10.4)% vs (50.0 ± 20.4)% (P=0.043), respectively. The 3-year probability of PFS and OS were (40.0 ± 17.4)% and (53.3 ± 17.3)% in bone marrow involvement patients and the corresponding figure were (77.9 ± 11.3)% and (84.4 ± 10.2)% in non- bone marrow involvement patients.

CONCLUSIONASCT could improve the survival of aggressive PTCLs. Non CR1 status and bone marrow involvement had negative influence on OS in patients with aggressive PTCLs treated by ASCT. The prognosis was very poor in patients with HSTL and satisfactory regimens should be investigated.

Adolescent ; Adult ; Child ; Female ; Hematopoietic Stem Cell Transplantation ; Humans ; Lymphoma, Large-Cell, Anaplastic ; Lymphoma, T-Cell, Peripheral ; Male ; Middle Aged ; Neoplasm Staging ; Prognosis ; Remission Induction ; Retrospective Studies ; Transplantation, Autologous ; Young Adult