Parathyroid carcinoma: Three case reports.

BACKGROUND: Parathyroid carcinoma (PC) is a rare, slow-growing malignant tumor and a rare cause of primary hyperfunctioning of the parathyroid, with a highly variable clinical course, depending on the aggressiveness of the individual tumor and the degree of hypercalcemia. CASE SUMMARY: The aim of this report is to summarize the diagnosis and treatment of three cases of PC and to review and conclude aspects regarding the three collected cases with reference to other relevant cases to explore the value of ultrasound in the diagnosis of PC. All three patients had hypercalcemia, consisting of a high serum calcium level and a high level of parathyroid hormone that was > 2-fold (even > 30-fold) of the normal upper limit. The ultrasonographic findings of the parathyroid gland showed that the glands were all > 30 mm, and the internal echo was uneven. All patients underwent surgery. PC in three cases was confirmed by routine histopathology and immunohistochemistry. CONCLUSION: As clinical signs and laboratory results are nonspecific, it is difficult to diagnose PC preoperatively, so imaging examinations are often needed.

Effects of Quercetin on the Intestinal Microflora of Freshwater Dark Sleeper Odontobutis potamophila.

Flavonoids have antimicrobial and anti-oxidation properties. The effects of the flavonoid quercetin on the intestinal microflora of freshwater dark sleeper Odontobutis potamophila were tested for the first time. Odontobutis potamophila juveniles were treated with quercetin for 21 days at one of three concentrations (2.5, 5.0, or 10.0 mg/L) and compared with a control group that was not treated with quercetin. Quercetin improved the stability of the intestinal flora in O. potamophila and the probiotic bacteria Bacillus spp. and Lactobacillus spp. increased in species abundance after the low concentration quercetin treatments. Furthermore, the abundance of pathogenic bacteria Plesiomonas spp., Aeromonas spp., and Shewanella spp. decreased after the fish had been exposed to quercetin. Activity of hepatic antioxidant enzymes (superoxide dismutase, SOD), (glutathione S-transferase, GST), (glutathione peroxidase, GSH-Px), and (total antioxidant capacity, T-AOC) increased in the livers of O. potamophila treated with quercetin, thereby increasing their hepatic antioxidant capacity and their ability to scavenge free radicals.

Effect of quercetin on muscle growth and antioxidant status of the dark sleeper Odontobutis potamophila.

Quercetin is a flavanol beneficial in reducing fat, promoting muscle growth, and Anti-oxidation. To study its effects in freshwater fish, the full-length cDNA of the follistatin (FST) and myostatin (MSTN) genes of the dark sleeper Odontobutis potamophila were cloned for the first time. Juvenile individual O. potamophila was exposed to quercetin at one of four concentrations (0, 2.5, 5, and 10 mg/L) for 21 days. The expression level of MSTN which inhibits muscle growth in the quercetin solution was lower than in the unexposed control group. The genes that promote muscle growth are in TGF-ß superfamily like FST, TGF-ß1 (transforming growth factor-beta 1), and Myogenic regulatory factors (MRFs) like Myf5 (myogenic factor 5), MyoD (myogenic differentiation), MyoG (myogenin), were higher than in the control group. Apolipoprotein and growth hormone receptor transcription levels in the quercetin-treated fish were significantly lower than in the control group. The concentrations of triglyceride, low-density lipoprotein cholesterol, and high-density lipoprotein cholesterol in the muscle tissue decreased, and the lipid-lowering function of quercetin was also demonstrated at the biochemical level. In this study, we analyzed the mRNA levels of AKT, Keap1 (kelch-like ECH-associated protein 1), Nrf2 (NF-E2-related factor 2) oxidation-related genes in the Nrf2/ARE antioxidant pathway, and Malondialdehyde (MDA), catalase (CAT) activity and glutathione (GSH) content in the hepatopancreas of O. potamophila after quercetin treatment, the mRNA expression of AKT, Nrf2 and CAT activity and GSH content are higher than in the control group. Quercetin enhances antioxidant properties and positively affects muscle growth. The results showed that quercetin has no significant effects on the growth performance of O. potamophila, but is effective in increasing muscle growth rate and lowering muscle fat content.

Antitumor activity of yulangsan polysacchrides in mice bearing S180 sarcoma tumors.

Sarcoma is one of the most prevalent pediatric tumors and the therapeutic role of chemotherapy has yet to be elucidated. It has been reported that extracts of Longyanshen (Yulangsan) may enhance the sensitivity of drug-resistant cancer cell lines, and improve the immune dysfunction induced by cyclophosphamide (CTX) in mice. The present in vivo study investigated the antitumor effects of Yulangsan polysaccharides (YLSPS) and their interaction with CTX in murine sarcoma 180 (S180)-bearing mice. Immunohistochemistry was used to detect the expression of apoptosis-related proteins. The ultrastructure of sarcoma cells was examined by transmission electron microscopy and the tumor growth rate was determined by measuring the tumor weight. A dose-dependent inhibition of sarcoma growth was observed in S180-bearing mice following administration of YLSPS. In combination with CTX, an additive antitumor effect was obtained, which was accompanied by amelioration of immune function. YLSPS also potentiated the tumor suppression effect of CTX while avoiding cytotoxicity against immune cells. YLSPS inhibited sarcoma growth in S180-bearing mice through the induction of apoptosis in S180 sarcoma cells. YLSPS also attenuated CTX-induced cytotoxicity to the immune system while potentiating the tumor suppression effect. These results provide additional information regarding combination therapy with YLSPS and chemotherapy for the treatment of sarcoma.

Histopathological characterization and fluorescence in situ hybridization of Cyprinid herpesvirus 2 in cultured Prussian carp, Carassius auratus gibelio in China.

Cyprinid herpesvirus 2 (CyHV-2) is an emerging pathogen in the commercially exploited fish, Prussian carp (Carassius auratus gibelio), which has caused huge economic loss in China and appears to be spreading worldwide. In this article, CyHV-2 infection of Prussian carp was confirmed for the first time by polymerase chain reaction (PCR), which gave positive results from the tissue samples dissected from moribund fish including kidney, spleen, liver, and gill. Histological examination showed systemic inflammatory reactions in the infected tissues, with infiltration of hemocytes, hypertrophied nuclei, marginal chromatin and karyorrhexis, epithelial cell shedding, vacuolar degeneration and focal necrosis. Tissue alterations were also evaluated semi-quantitatively by the degree of tissue change. The values of degree of tissue change determined for kidney, spleen, liver, and gill were significantly greater than respective controls and kidney was the most severely damaged organ, with highest degree of tissue change value. In addition, a fluorescence in situ hybridization (FISH) based on oligonucleotide probes to detect the pathogen directly in the tissue, allowing pathogen-lesion correlation, was established. With the advantages of better tissue penetration, potentially more specific and stable, three oligonucleotide probes were designed. Positive reactions to the probes with intense green fluorescence were observed within the infected tissues where PCR and H&E analysis had suggested previously the presence of the virus within these lesions. The probes did not hybridize with host tissues of uninfected fish, nor did they cross-react with 3 other virus samples tested. The current research could facilitate the study of CyHV-2 infection mechanism in Prussian carp, and enhance the early diagnosis of the novel virus.

Plasma exchange in small intestinal transplantation between ABO-incompatible individuals: A case report.

The aim of this study was to investigate the application of plasma exchange in small intestinal transplantation between ABO blood type-incompatible patients. A small intestinal transplantation case between ABO-incompatible individuals is hereby presented and analyzed. The main treatment included plasma exchange, splenectomy and immunosuppression. The patient undergoing small intestinal transplantation exhibited stable vital signs. A mild acute rejection reaction developed ~2 weeks after the surgery, which the patient successfully overcame. The subsequent colonoscopy and pathological examination revealed no signs of acute rejection. In conclusion, plasma exchange in combination with anti-immune rejection therapy proved to be an effective scheme for the management of small intestinal transplantation between ABO-incompatible patients.

Apogossypolone, a novel inhibitor of antiapoptotic Bcl-2 family proteins, induces autophagy of PC-3 and LNCaP prostate cancer cells in vitro.

Limited treatment options are available for aggressive prostate cancer. Gossypol has been reported to have a potent anticancer activity in many types of cancer. It can increase the sensitivity of cancer cells to alkylating agents, diminish multidrug resistance and decrease metastasis. Whether or not it can induce autophagy in cancer cells has not yet been determined. Here we investigated the antiproliferative activity of apogossypolone (ApoG2) and (-)-gossypol on the human prostate cancer cell line PC3 and LNCaP in vitro. Exposure of PC-3 and LNCaP cells to ApoG2 resulted in several specific features characteristic of autophagy, including the appearance of membranous vacuoles in the cytoplasm and formation of acidic vesicular organelles. Expression of autophagy-associated LC3-II and beclin-1 increased in both cell lines after treatment. Inhibition of autophagy with 3-methyladenine promoted apoptosis of both cell types. Taken together, these data demonstrated that induction of autophagy could represent a defense mechanism against apoptosis in human prostate cancer cells.

Inhibition of proliferation of prostate cancer cell line, PC-3, in vitro and in vivo using (-)-gossypol.

We investigated the antiproliferative activity of (-)-gossypol on the human prostate cancer cell line PC3 in vitro and in vivo to elucidate its potential molecular mechanisms. Cell growth and viability were evaluated using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and cell apoptosis was detected by flow cytometry, terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL) and electron microscopy. Expression of proliferating cell nuclear antigen (PCNA), Bcl-2, CD31, caspase-3 and caspase-8 in tumour tissue was determined by immunohistochemistry. The drug concentration that yielded 50% cell inhibition (IC(50) value) was 4.74 microg mL(-1). In the PC-3 tumour xenograft study, (-)-gossypol (> 5 mg kg(-1)) given once a day for 7 days significantly inhibited tumour growth in a dose-dependent manner. Immunohistochemical analysis revealed that (-)-gossypol enhanced caspase-3 and caspase-8 expression and decreased the expression of PCNA, Bcl-2 and CD31 in tumour tissues. It suggested that cell apoptosis and inhibition of angiogenesis might contribute to the anticancer action of (-)-gossypol.

[A comparative study on the properties of trichosanthin before and after site-directed PEGylation].

OBJECTIVE: To construct PEGylated trichosanthin (TCS) mutein and analyze its bioactivities, immunogenicity, acute toxicity, and pharmacokinetics. METHODS: The potential antigenic determinant site YFF81-83 in the molecule of TCS was selected to undergo site-directed mutagenesis. Thus, a TCS mutein named TCS(YFF81-83ACS) was constructed and expressed in Escherichia coli of the line BL21 (DE3). Wild TCS (wTCS), TCSY(FF81-83ACS), and PEGylated TCS(YFF81-83ACS) (PEG- TCS(YFF81-83ACS)) of different concentrations were incubated with the supercoiled plasmid pUC19 to detect the DNAse activity, mixed with rabbit reticulocyte lysate to detect the ribosome inactivation activity, subcutaneously injected into 6 mice respectively to measure the serum IgG and IgE levels, intravenously injected into mice to observe the toxicity, and intravenously injected into SD rats to observe its -plasma half-life. RESULTS: The DNAse activity of the PEG-TCS(YFF81-83ACS) was similar to that of the wTCS. The ribosome inactivation activity of the PEG-TCS(YFF81-83ACS) was 1/9-1/8 of that of the wTCS (P < 0.05). The serum IgE and IgG levels of the PEG-TCS(YFF81-83ACS) were both significantly lower than those of the wTCS (both P < 0.05). The LD50 of the PEG-TCS(YFF81-83ACS) was 1.8 times that of the wTCS (P < 0.05). The mean residence time and plasma half-life of the PEG-TCS(YFF81-83ACS) were significantly increased and its plasma clearance was significantly decreased (all P < 0.05). CONCLUSION: Site-directed mutagenesis and PEGylation of TCS provide a new approach for reconstructing TCS.

Effects of Astragalus polysaccharides (APS) on the expression of immune response genes in head kidney, gill and spleen of the common carp, Cyprinus carpio L.

For fish immune defences, cytokines and anti-microbial peptides (lysozyme) in circulating system play important roles. In the present study, the effects of Astragalus polysaccharides (APS) injection on gene expression of interleukin 1beta (IL-1beta), tumor necrosis factoralpha (TNF-alpha) and lysozyme-C in the head kidney, gill and spleen of common carp were determined using semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR). After injection of APS, IL-1beta mRNA level increased in a dose-dependent manner in the head kidney, while no significant changes were found in the gill and spleen. High dose of APS up regulated TNF-alpha transcription in the gill and spleen, while TNF-alpha mRNA level decreased significantly in the head kidney of low dose of APS. Lysozyme-C mRNA levels were up regulated in the gill of low dose of APS and spleen of middle dose of APS. No effect of the APS on lysozyme-C expression was observed in head kidney. These results constitute a first step toward the understanding of APS effect on cytokines and immune-related gene expression in different organs of common carp.

Effect of site-directed PEGylation of trichosanthin on its biological activity, immunogenicity, and pharmacokinetics.

Trichosanthin (TCS) is a type I ribosome-inactivating protein (RIP) with multiple biological and pharmacological activities. It has been approved effective in the clinical treatment of AIDS and tumor, but its strong immunogenicity and short plasma half-life have limited the clinical administration. To reduce the immunogenicity and prolong the plasma half-life of this compound, three TCS muteins (M(1), M(2) and M(3)) and two PEGylated TCS muteins (PM(1) and PM(2)) were constructed by site-directed mutagenesis and PEGylation, respectively. Compared with the unmodified TCS, both PEGylated TCS showed a 3- to 4-fold decrease in immunogenicity, a 0.5- to 0.8-fold decrease in non-specific toxicity, and a 4.5- to 6-fold increase in plasma half-life. But there is a problem of activity reduction. The increased circulating half-life in vivo may compensate for the reduced activity. Together with the other benefits of PEGylation such as reduced immunogenicity and toxicity, it is worthwhile to further explore the potential application of the PEGylated TCS as a better therapeutic agent for AIDS and tumor.