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In acute lung injury, two subsets of lung macrophages exist in the alveoli: tissue-resident alveolar macrophages (AMs) and monocyte-derived alveolar macrophages (MDMs).However, it is unclear whether these 2 subsets of macrophages have different functions and characteristics during the recovery phase. RNA-sequencing of AMs and MDMs from the recovery period of LPS-induced lung injury mice revealed their differences in proliferation, cell death, phagocytosis, inflammation and tissue repair. Using flow cytometry, we found that AMs showed a higher ability to proliferate, whereas MDMs expressed a larger amount of cell death. We also compared the ability of phagocytosing apoptotic cells and activating adaptive immunity and found that AMs have a stronger ability to phagocytose, while MDMs are the cells that activate lymphocytes during the resolving phase. By testing surface markers, we found that MDMs were more prone to the M1 phenotype, but expressed a higher level of pro-repairing genes. Finally, analysis of a publicly available set of single-cell RNA-sequencing data on bronchoalveolar lavage cells from patients with SARS-CoV-2 infection validated the double-sided role of MDMs. Blockade of inflammatory MDM recruitment using CCR2 −/− mice effectively attenuates lung injury. Therefore, AMs and MDMs exhibited large differences during recovery. AMs are long-lived M2-like tissue-resident macrophages that have a strong ability to proliferate and phagocytose. MDMs are a paradoxical group of macrophages that promote the repair of tissue damage despite being strongly pro-inflammatory early in infection, and they may undergo cell death as inflammation fades. Preventing the massive recruitment of inflammatory MDMs or promoting their transition to pro-repairing phenotype may be a new direction for the treatment of acute lung injury.
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Purpose To investigate the clinical and pathological features of inflammatory fibroid polyps ( IFPs) and to discuss its diag-nosis, differential diagnosis and treatment. Methods Clinicopathological data of 14 cases of IFPs were collected and analyzed retro-spectively. Results Most of the 14 cases were found to have submucosal polyps of the digestive tract protruding growing into the cavi-ty. Perivascular onion skinning which formed by spindle fibrocytes around vascular proliferation and eosinophilic inflammatory infiltrates were present as the characteristic feature of lesions. ABC results demonstrated that the lesions showed fibroblastic, myofibroblastic and dendritic cell signs. Conclusions IFPs are rare, benign tumors that can arise throughout the digestive tract, with unique histological changes in pathology. Surgical excision or endoscopic removal is the main treatment.
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ObjectiveTo investigate the risk of cerebral infarction on pat ients with transient ischemicattack (TIA) by combining ABCD2 score and three imaging methods.MethodsFive hundred and seventy-eight patients with TIA visiting our hospital from January 2007 to December 2011 were assessed for the risk of cerebral infarction after TIA by ABCD2 score method,magnetic resonance diffusion weighted imaging (DWI),magnetic resonance angiography (MRA) and carotid artery color Doppler imaging (CDFI).Cases were followed up on 2 d,7 d and 30 d for incidence of cerebral infarction.ResultsCerebral infarction occurred in 37 cases (6.40%),47 cases ( 8.13% ) and 61 cases ( 10.55% ) on day 2,day 7 and day 30.The occurrence of cerebral infarction after TIA in high risk group (35 cases ) by single ABCD2 score was found in 15 cases (42.86% ),18 cases (51.43%) and 21 cases (60.00%) on day 2,day 7 and day 30.Twenty-eight cases (54.90%),31cases (60.78% ),and 38 cases (74.51% ) of patients after TIA with ABCD2 > 3 and DWI positivity (51cases) suffered cerebral infarction on day 2,day 7 and day 30.Cerebral infarction occurred in 22 cases (61.11%),24 cases (66.67% ) and 30 cases (83.33%) of patients with ABCD2 > 3 points and cerebral artery stenosis (36 cases) on day 2,day 7 and day 30 after TIA.The occurrence of cerebral infarction after TIA on day 2,day 7 and day 30 were in 21 cases ( 60.00% ),23 cases ( 65.71% ),28 cases ( 80.00% ) of the patients with ABCD2 > 3 points and the carotid artery atheroma-caused bureaucratic stenosis (35 cases).There were no significant difference in the value of three methods to assess the risk of cerebral infarction in high-risk TIA groups (P > 0.05).ConclusionTIA patients can progress to cerebral infarction in the short term.There are some predictive value by ABCD2 score from 2 to 30 days for cerebral infarction occurring after TIA,but it is only a simple clinical assessment method.ABCD2 score > 3 points must be combined with DWI,MRA,and other tests in high-risk patients to identify the risk of cerebral infarction,thus improving the accuracy of the prediction.The combined evaluation of TIA patients will help the clinicians give better treatment and decision to this group of patients
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Objective To investigate the timing and security of oral glucose tolerance test (OGTT) in patients with acute coronary syndrome (ACS).Methods Two hundred and thirty-two hospitalized patients with ACS were collected from Jan.2007 to Jan.2012.OGTT was undergone in a stable condition at 3 months after being discharged,noting ECG and change of symptoms in patients.Results There was no significant difference in test results of proportions of patients with normal blood sugar [40.95% (95/232) vs.39.91% (89/215),x2 =0.051,P > 0.05 ],diabetes [ 25.00% (58/232) vs.22.33% (48/215),x2 =0.032,P > 0.05 ],impaired glucose tolerance [ 34.05% (79/232) vs.33.95% ( 73/215 ),x2 =0.001,P > 0.05 ],and impaired fasting glucose [2.59% (6/232) vs.2.33% (5/215),x2 =0.441,P >0.05 ] at 3 months after discharge compared with before discharge when patients were in stable conditions.No significant difference was found on ST segment ECG [ (-0.12 ±0.08 ) mV vs.(-0.15 ± 0.12) mV,t =0.23,P =0.85].Adverse symptoms were not found during the OGTT examination.Conclusion Patients with ACS have a high risk of abnormal glucose metabolism.Undergoing OGTT is safe for stable status patients with ACS.OGTT should be conducted as the routine exam.Early detection and appropriate intervention and treatment are necessary for patients with abnormal glucose metabolism.
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Objective To investigate the expression of KLF4 in cervical carcinoma and its significance. Methods Immunohistochemistry and tissue microarray were used to examine the expression of KLF4 in 39 cases of carcinoma, 30 cases of normal cervical epithelial tissues and 28 cases of cervical cancer in situ. Results Moderate to strong nuclear staining for KLF4 was found in normal tissues and cervical cancer in situ. Interestingly, KLF4 expression was lost in 16 (P<0.05) of 39 carcinoma cases. However, KLF4 expression was not associated with clinicopathologic parameters, including tumor stage and differentiation. Conclusion Our observations indicate that KLF4 may function as a tumor suppressor in the pathogenesis of cervical cancer.