The emergence of allergy caused by Pingyangmycin is rare. A case of allergy caused by minidose and low concentration Pingyangmycin was reported in this article.
Antibiotics, Antineoplastic ; Bleomycin ; analogs & derivatives ; Humans ; Hypersensitivity

A histologic study was performed if fibroblast proliferation could be inhibited in rab bits by deli very of bleomycin(1.35mg), an antineoplastic antibiotics, in a collagen sponge implant. Results showed that fibroblast proliferation was markedly inhibited and bleb longevity was prolonged when compared to controls. And inflammatory cell infiltration was noted around filtration wound.
Antibiotics, Antineoplastic ; Bleomycin* ; Blister ; Collagen* ; Fibroblasts ; Filtering Surgery* ; Filtration ; Glaucoma* ; Longevity ; Porifera* ; Wounds and Injuries

OBJECTIVETo explore the antitumor effect and toxicity of pegylated liposomal daunorubicin (PL-DNR) on leukemia.

METHODSPL-DNR was prepared by dry lipid hydration and remote loading, and its physicochemical indexes were analyzed. The inhibiting effect of PL-DNR on leukemia cells was observed in terms of in vitro cytotoxicity experiment. The therapeutic effect in vivo was assessed by tumor inhibition in leukemia L1210-bearing mice. Apoptosis in cardiomyocytes was detected using the terminal deoxynucleotidyl transferase mediated dUTP nick end labeling method (TUNEL staining).

RESULTSThe average diameter of PL-DNR was (110 ± 10)nm and the encapsulation efficiency was 94.21%. The in vitro cytotoxicity experiment showed that the inhibiting ability of PL-DNR in the treatment groups was continuously enhanced as the experiment proceeded. The in vivo pharmacodynamic experiment also indicated obvious tumor-inhibiting effect of PL-DNR. At the end of the experiment, the tumor volume of the PL-DNR group was (433.71 ± 234.77)mm(3), significantly smaller than that of (1 293.77 ± 381.26) mm(3) in the DNR group (P < 0.05). Moreover, the tumor weight of the PL-DNR group was (0.66 ± 0.29)g and that of the DNR group was (1.25 ± 0.43)g (P < 0.05). The myocardial toxicity experiment showed that the median apoptosis index of cardiomyocytes in the PL-DNR group was 13.83%, significantly lower than that of 42.67% in the DNR group (P < 0.05), indicating a lower toxicity of PL-DNR to the myocardium.

CONCLUSIONCompared with the free DNR, PL-DNR can improve the therapeutic effect on leukemia and reduce the.

Animals ; Antibiotics, Antineoplastic ; therapeutic use ; Apoptosis ; Daunorubicin ; therapeutic use ; Leukemia ; therapy ; Mice

Antibiotics, Antineoplastic ; pharmacology ; Apoptosis ; Cell Line, Tumor ; Doxorubicin ; pharmacology ; Gangliosides ; Humans ; NF-kappa B ; metabolism

BACKGROUNDBleomycin-induced fibrosis is extensively used to model aspects of the pathogenesis of interstitial pulmonary fibrosis. This study aimed to determine the benefic effects and mechanisms of simvastatin on bleomycin-induced pulmonary fibrosis in mice.

METHODSBleomycin-induced pulmonary fibrosis mice were administered with simvastatin in different doses for 28 days. We measured inflammatory response, fibrogenic cytokines and profibrogenic markers in both bleomycin-stimulated and control lungs, and correlated these parameters with pulmonary fibrosis.

RESULTSSimvastatin attenuated the histopathological change of bleomycin-induced pulmonary fibrosis and prevented the increase of lung hydroxyproline content and collagen (I and III) mRNA expression induced by bleomycin. Moreover, simvastatin down-regulated the increased expression of transforming growth factor-beta1 (TGF-beta1) and connective tissue growth factor (CTGF) induced by bleomycin at both gene and protein levels. Simultaneously, the accumulation of neutrophils and lymphocytes and the increased production of tumor necrosis factor-alpha (TNF-alpha) in bronchial alveolar lavage fluid were inhibited by simvastatin in early inflammatory phase after bleomycin infusion. The higher dose of simvastatin was associated with a more significant reduction in these inflammatory and fibrotic parameters. Furthermore, the inactivation of p38, RhoA and Smad2/3 signaling pathways was observed during simvastatin administration.

CONCLUSIONSSimvastatin attenuated bleomycin-induced pulmonary fibrosis, as indicated by decreases in Ashcroft score and lung collagen accumulation. The inhibitory effect of simvastatin on the progression of pulmonary fibrosis may be demonstrated by reducing inflammatory response and production of TGF-beta1 and CTGF. These findings indicate that simvastatin may be used in the treatment of pulmonary fibrosis.

Animals ; Antibiotics, Antineoplastic ; Bleomycin ; Mice ; Mice, Inbred C57BL ; Pulmonary Fibrosis ; chemically induced ; metabolism ; pathology ; Simvastatin ; pharmacology

In this study, the adsorption behavior of epirubicin hydrochloride (EPI) on carboxylated single-walled carbon nanotubes (c-SWNTs) obtained by mixture acid treatment was investigated. The results indicated that the dispersion of c-SWNTs in water was obviously improved. The absorption of EPI on c-SWNTs came to equilibrium after 240 min and could be explained by pseudo-second-order model. Moreover, there were heterogeneous distribution of active sites onto c-SWNTs surface and the Freundlich isotherm model was better fit to describe the absorption precess of EPI on c-SWNTs. The absorption capacity of EPI on c-SWNTs increased obviously with the increasing pH and decreasing temperature. Compared with multi-walled carbon nanotubes, carboxylated multi-walled carbon nanotubes, SWNTs, c-SWNTs possessed higher absorption capacity for EPI. The controlled, targeted and sustained release of EPI from c-SWNTs-EPI could be instructive for the development of nano-carrier.
Adsorption ; Antibiotics, Antineoplastic ; chemistry ; Carboxylic Acids ; chemistry ; Drug Carriers ; Epirubicin ; chemistry ; Nanotubes, Carbon ; chemistry

Aged ; Antibiotics, Antineoplastic ; therapeutic use ; Breast Neoplasms ; drug therapy ; Epirubicin ; therapeutic use ; Female ; Humans ; Middle Aged

AIMTo study the electrochemical behavior of daunorubicin at Co/GC ion implantation modified electrode.

METHODSWith Co/GC ion implantation modified electrode as working electrode, daunorubicin was determined by voltammetry in 0.05 mol x L(-1) Na2HPO4-KH2PO4 (pH 6.82) solution.

RESULTSA sensitive reductive peak of daunorubicin was obtained by linear sweep voltammetry. The peak potential was -0.60 V (vs SCE). The peak current was proportional to the concentration of daunorubicin over the range of 2.84 x 10(-8) - 1.42 x 10(-6) mol x L(-1) and 1.42 x 10(-6) - 1.28 x 10(-5) mol x L(-1) with the detection limit of 1.42 x 10(-8) mol x L(-1). The reduction wave was applied to the determination of daunorubicin. The electrochemical behavior and reaction mechanism were studied by linear sweep and cyclic voltammetry.

CONCLUSIONThe reduction process was quasi-reversible with adsorption characteristics.

Antibiotics, Antineoplastic ; analysis ; chemistry ; Carbon ; Cobalt ; Daunorubicin ; analysis ; chemistry ; Electrochemistry ; Electrodes ; Hydrogen-Ion Concentration

Anthracyclines/adverse effects* ; Antibiotics, Antineoplastic ; Cardiotoxicity/diagnostic imaging* ; Echocardiography/methods* ; Humans ; Polyketides ; Technology

OBJECTIVEThe cytotoxic effects of a new formulation of Pingyangmycin-activated carbon nanoparticles (PYM-CH-NP) on two human oral squamous cell carcinoma Tca8113 and BcaCD885 cell lines were studied in vitro.

METHODSThe inhibitory effects of PYM-CH-NP and Pingyangmycin (PYM) were evaluated by methyl thiazolyl tetrazolium (MTT) assay at 1-7 days. The 50% inhibition concentration values (IC50) and relative antitumor activity (RAA) of PYM-CH-NP and PYM against Tca8113 and BcaCD885 with different drug concentration were evaluated. The time-dependent cytotoxic effects of PYM-CH-NP and PYM were during 1-5 days, so the doseeffect relationship was investigated at 5th day.

RESULTSBoth PYM-CH-NP and PYM had high anticancer effects on Tca8113 and BcaCD885, and the cytotoxic effects were dose-dependent and time-dependent.

CONCLUSIONThe activated carbon nanoparticles (CH-NP) may serve as a new drug delivery carrier of PYM. The new formulation PYM-CH-NP could slow down drug release, prolonged the drug concentration and its acting time, so more effective anticancer efficacy could be achieved.

Antibiotics, Antineoplastic ; Bleomycin ; analogs & derivatives ; Carbon ; Carcinoma, Squamous Cell ; Cell Line ; Cell Line, Tumor ; Humans ; In Vitro Techniques ; Mouth Neoplasms ; Nanoparticles