OBJECTIVETo investigate the nephrotoxic effects of methyl cantharidimide tablets on urinary protein and enzymes in Beagle dogs.

METHODBeagle dogs were randomly divided into negative control group(blank tablet), methyl cantharidimide tablets group (6.11,12.21, 24.42 mg x kg(-1)), continuously 30 days of oral adminiStration, once a day. The drug and control group were collected and determined fresh urine in 1, 2, 3 and 4 weeks of the administration; Serum urea nitrogen (BUN), creatinine (Crea), total protein (TP) and albumin (ALB) as well as sodium, potassium, chloride electrolyte were determined on 15 and 30 days of the administration; Urine albumin (mAlb), kidney injury molecule-1 (KIM-1), neutrophil gelatinase-associated lipocalin( NGAL), N-acetyl-beta-D-glucosaminidase (NAG), clusterin, beta2-microglobulin (beta2-MG), alpha1-microglobulin (alpha1-MG), alanine aminopeptidase( AAP) and im- munoglobulins IgG were tested on 15 and 30 days of the administration.

RESULTCompared with the control group, urine protein and white blood cells was significantly increased in each dose group. On 15 days of the administration, mAlb were higher in each dose group, KIM-1, NGAL, clusterin, NAG and AAP were significantly higher in high-dose group, while the middle and low dose group had no significant difference, as well as blood SCr and BUN no obvious abnormalities. On 30 days, mAlb, KIM-1, clusterin, NAG, AAP were increased in each dose group, appearing dose-effect relationship, beta2-MG and NGAL levels were significantly increased in high-dose group. Contents above indicators were increased with significant dose and time relationship, and serum BUN, Scr were correlated, suggesting that urine mAlb, KIM-1, clusterin, NAG and AAP indicators that can sensitively respond the changes of proteins and enzymes in urine.

CONCLUSIONMethyl cantharidimide tablets has a renal toxicity, urine mAlb, KIM-1, clusterin, NAG and AAP can be used as the early nephrotoxic biomarkers of methyl cantharidimide tablets.

Animals ; Biomarkers ; urine ; Dogs ; Female ; Kidney ; drug effects ; Kidney Diseases ; chemically induced ; Male ; Proteins ; metabolism ; Tablets ; adverse effects ; Urine ; chemistry

OBJECTIVETo study the clinicopathologic features, immunophenotype and genetic changes of perivascular epithelioid cell neoplasms (PEComa).

METHODSA total of 25 cases of PEComa located in various anatomic sites were selected for immunohistochemical staining (SP or EnVision method). TFE3 fluorescence in-situ hybridization was also performed to determine the TFE3 gene status.

RESULTSThe age of patient ranged from 21 to 61 years (mean = 43 years). The male-to-female ratio was 1: 1.3. Histologically, 22 cases represented conventional angiomyolipomas, composed of a mixture of adipose tissue, spindle element, epithelioid smooth muscle cells and abnormal thick-walled blood vessels in various proportions. Three cases involving lung, soft tissue and broad ligament had subtle but distinctive morphologic features. Nested or sheet-like architecture with epithelioid or spindle cells was observed. Immunohistochemical study showed that HMB 45, melan A, smooth muscle actin and cathepsin K were expressed in 80% (20/25), 88% (22/25), 88% (22/25) and 100% (25/25) of PEComa, respectively. Within positive cases, the average proportion of positive tumor cells was 36%, 41%, 35% and 90% respectively for HMB 45, melan A, smooth muscle actin and cathepsin K. TFE3 was negative in all of the 22 renal and hepatic PEComa studied, while it was positive in the 3 cases of extra-hepatorenal PEComa. None of the 25 cases exhibited evidence of TFE3 gene fusion or amplification.

CONCLUSIONSExtra-hepatorenal PEComa have distinctive morphologic features and are associated with TFE3 overexpression. Cathepsin K immunostaining demonstrates high sensitivity and specificity in PEComa, better than other commonly employed immunomarkers. This marker is thus useful in diagnosis of PEComa and distinction with other neoplasms.

Actins ; metabolism ; Adult ; Angiomyolipoma ; metabolism ; pathology ; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors ; genetics ; metabolism ; Cathepsin K ; metabolism ; Female ; Humans ; Immunohistochemistry ; Kidney Neoplasms ; metabolism ; pathology ; Liver Neoplasms ; metabolism ; pathology ; MART-1 Antigen ; metabolism ; Male ; Melanoma-Specific Antigens ; metabolism ; Middle Aged ; Perivascular Epithelioid Cell Neoplasms ; metabolism ; pathology ; Young Adult

BACKGROUNDEven carrying an identical gene mutation, inter- and intra-family variations have been noticed worldwide in the presence and the severity of left ventricular hypertrophy and sudden death in patients with hypertrophic cardiomyopathy (HCM). Modifier genes may contribute to the diversity. Angiotensin-converting enzyme 2 (ACE2) gene has been established to be associated with parameters of left ventricular hypertrophy in community based male subjects. The objective of the present study was to investigate the association of ACE2 gene polymorphisms with the phenotype of HCM.

METHODSA total of 261 consecutive HCM patients and 609 healthy controls were enrolled into this study. The polymorphism of rs2106809 and rs6632677 were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and confirmed by sequencing. Logistic regression model and multivariate analysis were used to determine the odds ratio (OR) and 95% confidence intervals (CI) of variations of ACE2 for HCM.

RESULTSThe T allele of rs2106809 and C allele of rs6632677 conferred increasing risk for HCM (OR 1.34, 95% CI 1.01 - 1.77, P = 0.04; OR 1.11, 95% CI 1.03 - 1.21, P = 0.002, respectively), and the 2 single nucleotide polymorphisms (SNPs) were in strong linkage disequilibrium (LD), the TC haplotype was independently associated with a higher OR for HCM (OR = 1.59, 95% CI 1.21 - 1.87) after adjusted for conventional risk factors. And the risk alleles were associated with thicker interventricular septal thickness of HCM ((20.0 +/- 6.3) mm vs (17.9 +/- 5.5) mm, P = 0.03 and (21.3 +/- 5.9) mm vs (17.9 +/- 5.8) mm, P = 0.04, respectively). No association was found between the two polymorphisms with female patients with HCM.

CONCLUSIONMinor alleles of ACE2 gene might be the genetic modifier for the magnitude of left ventricular hypertrophy in male patients with HCM.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Cardiomyopathy, Hypertrophic ; genetics ; Humans ; Hypertrophy, Left Ventricular ; genetics ; Male ; Middle Aged ; Peptidyl-Dipeptidase A ; genetics ; Polymorphism, Genetic ; Sex Factors

The aim of this paper was to investigate the immunosuppressive effects of dihydroartemisinin and Huobahua compatibility in mice with delayed hypersensitivity and explore its possible mechanism. The delayed-type hypersensitivity(DTH) model in mice was established to observe the immunosuppressive effects of dihydroartemisinin and Huobahua compatibility in DTH mice. ELISA assay was used to detect the contents of interferon(IFN-γ); histopathological changes and degree of mononuclear infiltration of right ear tissues were examined by HE staining; the expression level of intercellular cell adhesion molecule-1(ICAM-1) in the right ear of mice was detected by immunohistochemistry; the protein expression levels of p38 phospho mitogen activated protein kinase(p-p38 MAPK) was detected by Western blot analysis. As compared with the control group, the degree of ear swelling, thymus/spleen index, serum IFN-γ as well as the number and degree of infiltration of monocytes were significantly increased in the model group. As compared with the model group, the degree of ear swelling and thymus/spleen index of the mice in the combination group were significantly reduced; the number and degree of infiltration of monocytes were significantly relieved; the serum levels of IFN-γ and the expression levels of p-p38 MAPK and ICAM-1 proteins in the right ear were also significantly reduced. The combination of dihydroartemisinin and Huobahua can significantly inhibit the DTH response, and it may regulate the production and secretion of related inflammatory factor IFN-γ by inhibiting the phosphorylation activity of p38 MAPK, thereby further reducing the expression of ICAM-1 and thus exerting the immunosuppressive effect.
Animals ; Artemisinins ; Intercellular Adhesion Molecule-1/genetics* ; Mice ; Monocytes ; p38 Mitogen-Activated Protein Kinases/genetics*

Based on the transcriptome data, the study cloned full-length cDNA of TwGPPS1 and TwGPPS2 genes from Tripterygium wilfordii suspension cells and then analyzed the bioinformation of the sequence and protein expression. The cloned TwGPPS1 has a 1 278 bp open reading frame (ORF) encoding a polypeptide of 425 amino acids. The deduced isoelectric point (pI) was 6.68, a calculated molecular weight was about 47.189 kDa. The full-length cDNA of the TwGPPS2 contains a 1 269 bp open reading frame (ORF) encoding a polypeptide of 422 amino acids. The deduced isoelectric point (pI) was 6.71, a calculated molecular weight was about 46.774 kDa.The entire reading frame of TwGPPS1,2 was cloned into the pET-32a(+) vector and expressed in E. coli BL21 (DE3) cells to obtain the TwGPPS protein, which laid a basis for further study on the regulation of terpenoid secondary metabolism and biological synthesis.