Fibrinogen-like protein 2 expression correlates with microthrombosis in rats with type 2 diabetic nephropathy

Fibrinogen-like protein 2 （fgl2）, a novel prothrombinase, is involved in microthrombosis. We examined fgl2 expression in the glomerular and tubulointerstitial capillaries and its correlation with microthromsis in rats with streptozocin-induced type 2 diabetic nephropathy. Our RT-PCR and immunoblotting analysis showed that fgl2 mRNA and protein levels were increased in microvascular endothelial cells of the glomeruli and renal interstitia at week 19 and became significantly elevated with the development of diabetic nephropathy （P 〈 0.01）. Fgl2 was not or only weakly expressed in the renal tissues of normal rats. Furthermore, a direct significant correlation （r = 0.543, P 〈 0.01） was found between fgl2 expression and microthrombotic capillaries in the renal tissues. Enzyme linked immunosorbent assays （ELISA） additionally showed that circulating TNF-α levels in rats with type 2 diabetes were significantly elevated and closely correlated with fgl2 expression （r = 0.871, P 〈 0.01）. Our results suggest that fgl2 may activate renal microthrombosis, thus contributing to glomerular hypertension and renal ischemia.

Microthrombosis induced by mechanical factors and light-dye treatment

Introduction Thrombosis is the formation of a blood clot in a blood vessel. When thrombosis happens in the brain,it would cause stroke; when happens in the heart,it would cause heart attack. If a thrombus breaks and travels to the lung,it would

Targeting microthrombosis and neuroinflammation with vepoloxamer for therapeutic neuroprotection after traumatic brain injury

Traumatic brain injury （TBI）： Despite improved supportive and rehabilitative care of TBI patients, TBI remains a leading cause of death and disability worldwide. To date, no effective pharmacological treatments are available for TBI. The mechanisms underlying brain damage and repair following TBI are complex and not completely understood. Coagulopathy after TBI is frequent and an independent prognostic factor for unfavorable outcome and prognosis （Stein and Smith, 2004）. It may be amenable to treatment, and effective management of coagulopathy may protect from secondary injury and poor outcomes. Although the main challenge for TBI management is to address the risk of hypocoagulopathy with prolonged bleeding and progression of hemorrhagic lesions, the risk of hypercoagulopathy with an increased microthrombosis formation warrants investigation to reduce neurological deficits after TBI.

Etiopathogenic theories about long COVID

The main etiopathogenic theories of long coronavirus disease(COVID)are listed and a conjunction of them is carried out with the objective of deciphering the pathophysiology of the entity,finally the main lines of treatment existing in real life are discussed(Paxlovid,use of antibiotics in dysbiosis,triple anticoagulant therapy,temelimab).

Correlation of fibrinogen-like protein 2 with progression of acute pancreatitis in rats

AIM: To examine fibrinogen-like protein 2 (fgl2) expression during taurocholate-induced acute pancreatitis progression in rats and its correlation with pancreatic injury severity. METHODS: Forty-eight male Sprague-Dawley rats were randomly divided into the severe acute pancreatitis (SAP) group (n = 24) and the sham operation (SO) group (n = 24). Sodium taurocholate (4% at doses of 1 mL/kg body weight) was retrogradely injected into the biliopancreatic ducts of the rats to induce SAP. Pancreatic tissues were prepared immediately after sacrifice. At the time of sacrifice, blood was obtained for determination of serum amylase activity and isolation of peripheral blood mononuclear cells (PBMCs). Pancreatic tissue specimens were obtained for routine light microscopy including hematoxylin and eosin staining, and the severity of pancreatic injury was evaluated 1, 4 and 8 h after induction. Expression of fgl2 mRNA was measured in the pancreas and PBMCs using reverse transcription polymerase chain reaction. Expression of fgl2 protein was evaluated in pancreatic tissues using Western blotting and immunohistochemical staining. Masson staining was also performed to observe microthrombosis. RESULTS: At each time point, levels of fgl2 mRNAs in pancreatic tissues and PBMCs were higher (P < 0.05) in the SAP group than in the SO group. For pancreatic tissue in SAP vs SO, the levels were: after 1 h, 3.911 ± 1.277 vs 1.000 ± 0.673; after 4 h, 9.850 ± 3.095 vs 1.136 ± 0.609; and after 8 h, 12.870 ± 3.046 vs 1.177 ± 0.458. For PBMCs in SAP vs SO, the levels were: after 1 h, 2.678 ± 1.509 vs 1.000 ± 0.965; after 4 h, 6.922 ± 1.984 vs 1.051 ± 0.781; and after 8 h, 13.533 ± 6.575 vs 1.306 ± 1.179. Levels of fgl2 protein expression as determined by Western blotting and immunohistochemical staining were markedly up-regulated (P < 0.001) in the SAP group compared with those in the SO group. For Western blotting in SAP vs SO, the results were: after 1 h, 2.183 ± 0.115 vs 1.110 ± 0.158; after 4 h, 2.697 ± 0.090 vs 0.947 ± 0.361; and after 8 h, 3.258 ± 0.094 vs 1.208 ± 0.082. For immunohistochemical staining in SAP vs SO, the results were: after 1 h, 1.793 ± 0.463 vs 0.808 ± 0.252; after 4 h, 4.535 ± 0.550 vs 0.871 ± 0.318; and after 8 h, 6.071 ± 0.941 vs 1.020 ± 0.406. Moreover, we observed a positive correlation in the pancreas (r = 0.852, P < 0.001) and PBMCs (r = 0.735, P < 0.001) between fgl2 expression and the severity of pancreatic injury. Masson staining showed that microthrombosis (%) in rats with SAP was increased (P < 0.001) compared with that in the SO group and it was closely correlated with fgl2 expression in the pancreas (r = 0.842, P < 0.001). For Masson staining in SAP vs SO, the results were: after 1 h, 26.880 ± 9.031 vs 8.630 ± 3.739; after 4 h, 53.750 ± 19.039 vs 8.500 ± 4.472; and after 8 h, 80.250 ± 12.915 vs 10.630 ± 7.003.CONCLUSION: Microthrombosis due to fgl2 overexpression contributes to pancreatic impairment in rats with SAP, and fgl2 level may serve as a biomarker during early stages of disease.

褐藻淀粉硫酸酯对家兔心肌梗塞样损害的影响

本文通过心电图观察。血清磷酸肌酸激酶(SCPK)活性测定、心肌切片病理学研究、球结膜微循环显微电视观察和照相,比较了褐藻淀粉硫酸脂(LS)和肝素对78只由异丙基肾上腺素所致的家兔实验性心肌梗塞的影响。LS50mg/kg 腹腔注射和肝素4mg/kg 腹腔注射虽不能予防心电图异常 T 波的出现,但能促进其恢复,予防 SCPK 异常升高,微循环障碍恢复加快,心肌坏死程度按 Rona 分级减轻,经 H 检验有显著差异(P<0.05)。