Focusing on renal recovery——How to prevent and treat acute kidney injury / 医学研究生学报

Acute kidney injury (AKI) is a common clinical syndrome of critical illness in the world, with high incidence in critically ill patients and having strong association with short-term and long-term poor prognosis in patients. It carries an increased risk of mortality, chronic kidney disease (CKD), end stage renal disease (ESRD) and cardiovascular adverse events, causing a huge burden of disease around the world. Yet AKI can be preventable and treatable. With the continuous exploration into the clinical research of AKI, renal recovery becomes a new target for AKI prevention and treatment. Here, we focused on influence factors of kidney recovery after AKI, integrating the new advances in AKI early risk prediction, early identification of AKI based on biomarkers, AKI electronic alert system, AKI care Bundle and standardized acute renal replacement therapy, to clarify how to prevent and treat AKI to accelerate renal recovery.

Clinicopathologic analysis of spermatocytic seminoma / 中华病理学杂志

<p><b>OBJECTIVE</b>To study the clinicopathologic features and biological behavior of spermatocytic seminoma.</p><p><b>METHODS</b>A retrospective analysis of patients diagnosed as seminoma, spermatocytic seminoma between January 2003 and May 2011, was performed. Clinical data, HE stained section and immunohistochemical staining (SP method) were reviewed with follow-up.</p><p><b>RESULTS</b>Sixty-six cases of seminoma and 5 cases of spermatocytic seminoma were identified. The average age at the diagnosis of 5 cases of spermatocytic seminoma was 53 years, and no patient had a history of crytorchidism or germ cell tumor. All five patients had stage pT1 tumor. Immunohistochemical studies showed that spermatocytic seminoma was negative for CK, vimentin, OCT3/4, PLAP, and LCA, and PAS staining was also negative. All five patients were well after operation. In contrast, the average age at diagnosis of the 66 cases of seminoma was 37 years, in which 12% had a history of crytorchidism and 11% were in stage pT2 or the above. Immunohistochemical studies showed that seminoma was positive for OCT3/4, PLAP, and CD117. During the follow-up, 2 patients developed metastasis and 3 patients died of the disease.</p><p><b>CONCLUSIONS</b>Spermatocytic seminoma is rare and appears to follow a benign clinical course Due to its favourable prognosis, further treatment is not necessary after orchidectomy. Accurate pathologic diagnosis is critical for patient management and for avoiding over-treatment.</p>

Incidence of oral hairy leukoplakia in human immunodeficiency virus-seropositive adult patients in Yunnan, China / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To study the incidence rates, clinical characteristics of oral hairy leukoplakia (OHL) and its relation to the immune status in a sample of human immunodeficiency virus (HIV)-infected adults in Yunan, China.</p><p><b>METHODS</b>1 060 adult patients with HIV from January 2008 to June 2010 were evaluated. The age, gender, education grade, diagnosis time of HIV-infected, route of transmission, xerostomia, oral candidiasis, high active antiretroviral therapy and CD4 lymphocytes counts. The occurrence of OHL was recorded by oral examination. The relationship of CD4 lymphocytes counts and the incidence of OHL were analyzed by statistical methods.</p><p><b>RESULTS</b>There were 94 OHL patients in 1 060 HIV patients (8.9%). The average age of the OHL patients was (39.33 +/- 10.45) years old. 90% OHL was found on the two lateral aspect of the tongue. The CD4 lymphocytes of 70.2% OHL patients were less than 200 mm-3.</p><p><b>CONCLUSION</b>OHL is a frequent finding in patients with indicates severe immunosuppression and associated with the reduction of CD4 lymphocytes.</p>

Effects of interaction between vascular endothelial cells and monocytes on expression of matrix metalloproteinase-2 and of tissue inhibitor of metalloproteinases 2 and regulation of pravastatin / 中华病理学杂志

<p><b>OBJECTIVE</b>To analyze the effects of interaction between vascular endothelial cells and monocytes on the expression of matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of metalloproteinase 2 (TIMP-2), as well as the regulation of pravastatin.</p><p><b>METHODS</b>A co-cultured system of monocytes and endothelial cells was established through addition of THP-1 to human umbilical vein endothelial cells (HUVECs) in various rates. After 24 hours, the changes in activity and expression of MMP-2 and TIMP-2 in the co-culture system were studied by zymography and reverse zymography. The 1:1 co-culture system was selected and one control group (no pravastatin added) and experimental groups (with concentration of pravastatin being 0.1, 0.5 and 1.0 micromol/ml respectively) were studied. All groups were cultured for another 24 hours and analyzed in the same way.</p><p><b>RESULTS</b>Compared to the single cultured HUVECs, the activity of proMMP-2 in the co-cultured system increased by 2.09, 2.46 and 2.07 folds respectively (number = 8, P < 0.01). There was also activated MMP-2 secretion in the co-culture system. The secretion of proMMP-2 and active MMP-2 in the 1:1 co-cultured system was most obvious. After pravastatin treatment, the activity of proMMP-2 and MMP-2, decreased significantly (number = 8, P < 0.01). MMP-2 secretion was completely suppressed after 1.0 micromol/ml pravastatin treatment. Reverse zymography revealed that, compared to the single culture HUVECs or THP-1, the secretion of TIMP-2 decreased in the co-cultured system, regardless of the ratio of mixture. However, pravastatin had no obvious effect on TIMP-2.</p><p><b>CONCLUSIONS</b>Interaction between vascular endothelial cells and monocytes may contribute to the secretion and activation of MMP-2 and suppress secretion of TIMP-2. Pravastatin may inhibit the secretion and activation of MMP-2.</p>

Effect and mechanism of fibroblast growth factor in promoting endothelia cell proliferation / 中华创伤杂志

Objective To determine the effect of fibroblast growth factor (FGF) on endothelia cell (EC) proliferation in vitro,TNP-470 and dexamethasone (Dex) and explore the possible mechanisms of FGF stimulating EC proliferation. Methods Cultured human umbilical vein endothelial cell (HUVEC) was divided into two groups: control group (Group DMEM) and experimental groups (Group FGF,Group Dex,Group TNP-470,Group FGF+Dex,Group FGF+TNP-470). The EC proliferation was quantified by a colorimetric assay using MTT reagent,the relative cell numbers at every time point of EC cycle analyzed with flow cytometer,and the expression of nuclear factor-kappa B p65 (NF-?B p65) and ki-67 detected with immunohistochemical method of SABC. Results FGF stimulated significantly EC proliferation,raised proliferation index (PI) and enhanced the expressions of NF-?B p65 and ki-67 in nuclear. TNP-470 reduced PI and TNP-470 and Dex suppressed EC proliferation and finally decreased the expressions of NF-?B p65 and ki-67 in nuclear. FGF could facilitate the inhibitory effect of TNP-470 and Dex. Conclusions The possible mechanism of EC proliferation stimulated by FGF is that FGF can activate NF-?B to promote the synthesis of DNA and EC mitosis. TNP-470 and Dex suppress proliferation and differentiation of EC but FGF may reverse such suppressive effect.