OBJECTIVETo study the chemical constituents of Gekko swinhonis.

METHODThe compounds were isolated and purified by several column chromatographic methods with silica gel, ODS, Sephadex LH-20 and preparative HPLC, Their structures were identified by physicochemical properties and spectral data.

RESULTThirteen compounds were isolated and elucidated as cyclo-(Pro-Leu) (1), cyclo-(Ala-Pro) (2),cyclo-(Gly-Pro) (3),cyclo-(Ala-Val) (4),6-amino-9-beta-D-ribofuranosyl-9H-purine (5), uridine (6), thymidine (7),hypoxanthine-9-beta-D-ribofuranosid (8),L-phenylalanine (9),5alpha-cholest-3,6-dione (10),cholesterol (11), 1-O-hexadecanolenin (12),octadecanoic acid (13),respectively.

CONCLUSIONAll compounds were isolated from G. swinhonis for the first time.

Animals ; Dipeptides ; analysis ; Lizards ; Medicine, Chinese Traditional

Extracellular recording is a key technology to study many types of brain functions. However the amplitudes of extracellular spikes are typically about 100 muV and should be picked up and amplified specially, then recorded and analyzed online. Most of the equipment for extracellular recording are either very expensive, or too large for recording in the brains of freely moving small animals. In this paper we developed a practical multi-electrode recording system based on virtual testing technology. The system includes microelectrode amplifier, analog input device NI4472 with 24-bit resolution, and data processing software SPKrec. The features of the hardware are low noise, high input impedance, a total gain of 2 000, and large dynamic range. The software developed in LabVIEW is capable of online analysis, data recording, spike detection, fire rate histograms, etc. The system functions have been verified in extracellular recording in the olfactory bulb of Gekko gecko. The result indicates that the system with performance comparable to that of commercial products meets the requirements of recording experiments.
Animals ; Brain ; physiology ; Lizards ; physiology ; Microelectrodes ; Olfactory Bulb ; physiology

AIMTo observed the expression of estrogen receptor (ER alpha and ER beta) in the heart of Gekko swinhonis.

METHODSThe immunohistochemical technique for the estrogen receptor was used.

RESULTSThe positive ER alpha and beta cells existed in cardiac myocytes and fibroblasts of the atria and the ventricles of Gekko swinhonis and had no sexual difference. The difference of ER alpha between the atria (11.56 +/- 1.67) and ventricles (6.68 +/- 1.88) was observed in both sexes (P < 0.01).

CONCLUSIONThe atria are probably the main target tissue of estrogen through ER alpha pathway while some functions of whole heart will be regulated by estrogen through ER beta pathway. The sexual differences aren' t related to the content of ER. It may be involved in the state of activity and function of ER under the physiological conditions.

Animals ; Estrogen Receptor alpha ; metabolism ; Estrogen Receptor beta ; metabolism ; Female ; Immunohistochemistry ; Lizards ; physiology ; Male ; Myocardium ; metabolism

Iran bears a remarkable variety of reptiles. One of the lizard families occurring in Iran is the Family Agamidae which is widely are distributed throughout the old world. The large-scaled rock agamid, Laudakia nupta, is one of the well-known agamid. There are few reports of cloacal microbial on reptiles hence their function in cloacae remains unknown. Laudakia nupta usually live in rural and urban areas and close vicinity to man, they are likely to play an important role in the spread of disease that may be caused by these microorganisms and their transmission to man. Therefore, the aim of this study was to identify the bacterial flora colonizing the cloacal region of Laudakia nupta using molecular studies. The cloacal fluids were directly placed on nutrient agar (NA) plates and incubated at 25 ± 2 ℃ for 48 h. The resulting bacterial colonies were transferred to fresh nutrient agar (NA) plates for molecular studies. Twelve isolates were obtained from 17 specimens of Laudakia nupta. All bacteria isolates were identified as Bacillus subtillis (5), Bacillus cereus (4), Bacillus sp. (1), Pseudomonas putida (1), and Pseudomonas sp. (1) based on partial sequences of the 16 s rRNA gene. This is the first comprehensive report of bacteria spp. associated with cloaca of Laudakia nupta using molecular studies. In this research, we found that Laudakia nupta can be a carrier of bacteria which can transfer microorganisms to hosts.
Agar ; Bacillus ; Bacillus cereus ; Bacteria ; Cloaca ; Colon ; Genes, rRNA ; Humans ; Iran ; Lizards ; Pseudomonas ; Pseudomonas putida ; Reptiles

The high resistance to infections in lizard wounds suggests that these reptiles possess effective antimicrobial peptides in their tissues. The present immunocytochemical study shows the cellular localization of beta-defensin 27 in tail tissues and in the blood, a defensin previously identified in the lizard Anolis carolinensis through biomolecular methods. Beta-defensin-27 immunoreactivity is only observed in some large granules mainly contained in heterophilic granulocytes that are sparse within the dermis of the skin or in the isolated blood. This peptide is absent in other cell types of the skin, in keratinocytes and in subdermal muscle tissue of the tail in normal conditions. Pre-corneous keratinocytes of the regenerating tail epidermis are unlabeled or show a weak labeling for the peptide only in sparse cytoplasmic areas or in the extracellular spaces among corneocytes of the wound and regenerating epidermis. The study suggests that beta-defensin 27 is normally stored in granulocytes present in the blood or in connective tissues while in the epidermis keratinocytes do not show the presence of this peptide unless these cells are stimulated from injury to produce and likely release beta-defensins.
beta-Defensins ; Connective Tissue ; Cytoplasm ; Dermis* ; Epidermis* ; Extracellular Space ; Granulocytes* ; Keratinocytes ; Lizards* ; Methods ; Muscles ; Peptides ; Reptiles ; Skin* ; Tail ; Wounds and Injuries*

Epimorphic regeneration in vertebrates involves the restoration of lost tissue or organs through the formation of a regeneration blastema and occurs through a complex interaction of a number of molecular signaling pathways. Of the many effectors of successful tail regeneration in the lizard Hemidactylus flaviviridis, one crucial pathway is the cyclooxygenase-2 (COX-2) mediated PGE2 signaling pathway. The current study was aimed at understanding whether COX-2 signaling plays any role in the expression of Wnt/β-Catenin signaling components during regenerative outgrowth in H. flaviviridis. Etoricoxib—selective inhibitor of the inducible isoform of COX-2—was administered to lizards orally. We tested the expression of β-Catenin during wound epidermis and blastema stages in the regenerating tail and found a reduction in its expression in response to drug treatment. Further, it was observed that the expression of canonical Wnt ligands was greatly altered due to COX-2 inhibition. Our results provide evidence of a cross-talk between the COX-2 induced PGE₂ pathway and Wnt/β-Catenin signaling in the regenerating lizard tail. An understanding of the interaction among various signaling pathways will help elucidate the mechanism underlying epimorphosis in lizards, the only amniotes capable of appendage regeneration.
beta Catenin ; Cyclooxygenase 2* ; Dinoprostone ; Epidermis ; Inflammation ; Ligands ; Lizards* ; Prostaglandin-Endoperoxide Synthases ; Regeneration ; Tail* ; Vertebrates ; Wounds and Injuries

Anti-tumor activity of the proteins from Gecko (GP) on cervical cancer cells, and its signaling mechanisms were assessed by viable cell counting, propidium iodide (PI) staining, and Western blot analysis. GP induced the cell death of HeLa cells in a dose-dependent manner while it did not affect the viability of normal cells. Western blot analysis showed that GP decreased the activation of Akt, and co-administration of GP and Akt inhibitors synergistically exerted anti-tumor activities on HeLa cells, suggesting the involvement of PI3-kinase/Akt pathway in GP-induced cell death of the cancer cells. Indeed, the cytotoxic effect of GP against HeLa cells was inhibited by overexpression of constituvely active form of Akt in HeLa cells. The candidates of the functional proteins in GP were analyzed by Mass-spectrum. Taken together, our results suggest that GP elicits anti-tumor activity against HeLa cells by inhibition of PI3-kinase/Akt pathway.
Blotting, Western ; Cell Count ; Cell Death ; HeLa Cells ; Humans ; Lizards ; Phosphatidylinositol 3-Kinases ; Propidium ; Proteins ; Uterine Cervical Neoplasms

OBJECTIVETo study the effects of C. versicolor petroleum ether extracts (CVPE) on the adenohypophysis androgen receptor level in mature castrated male rats.

METHODAll the rats in experiment were anesthetized for bilateral testicular and epididymis removal under sterile condition. The rats were randomized into four groups on the 14 th day after operation. The first group was intragastric physiological saline for castratered control group. The second group was intragastric CVPE 2 g x kg(-1) for low-dose group. The third group was high-dose group by giving CVPE 4 g x kg(-1). The fourth group was injected hypodermic testosterone propionate for positive-effect drug treatment group. The drug was given orally to animals one time a day successively for 21 days. The androgen receptor (AR) in adenohypophysis of mature castrated male rats was determined by the immunohistochemistry method and the level of serum testosterone (T) were determined by the radio-immunoassay after ig CVPE for 21 days.

RESULTThe immunohistochemistry results showed that positive cell numbers of androgen receptor in positive control and each CVPE groups were more than those in the castrated control group. The serum T level was increased greatly in mature castrated male rats treated with CVPE compared with the control group (P < 0.05, P < 0.01).

CONCLUSIONThe results show that CVPE can increase the adenohypophysis androgen receptor and serum T level in mature castrated male rats. It is indicated that CVPE has the effects on the hypophysis function.

Animals ; Lizards ; Male ; Materia Medica ; isolation & purification ; pharmacology ; Orchiectomy ; Pituitary Gland, Anterior ; drug effects ; metabolism ; Random Allocation ; Rats ; Rats, Wistar ; Receptors, Androgen ; metabolism ; Testosterone ; blood

PURPOSE: Immunotherapy is one of the treatment strategies for breast cancer, the most common cancer in women worldwide. In this approach, the patient's immune system is stimulated to attack microscopic tumors and control metastasis. Here, we used interferon γ-induced protein 10 (IP-10), which induces and strengthens antitumor immunity, as an immunotherapeutic agent. We employed Leishmania tarentolae, a nonpathogenic lizard parasite that lacks the ability to persist in mammalian macrophages, was used as a live delivery system for carrying the immunotherapeutic agent. It has been already shown that arginase activity, and consequently, polyamine production, are associated with tumor progression. METHODS: A live delivery system was constructed by stable transfection of pLEXSY plasmid containing the IP-10-enhanced green fluorescent protein (IP-10-egfp) fusion gene into L. tarentolae. Then, the presence of the IP-10-egfp gene and the accurate integration location into the parasite genome were confirmed. The therapeutic efficacy of IP-10 delivered via L. tarentolae and recombinant pcDNA-(IP-10-egfp) plasmid was compared by determining the arginase activity in a mouse 4T1 breast cancer model. RESULTS: The pcDNA-(IP-10-egfp) group showed a significant reduction in tumor weight and growth. Histological evaluation also revealed that only this group demonstrated inhibition of metastasis to the lung tissue. The arginase activity in the tissue of the pcDNA-(IP-10-egfp) mice significantly decreased in comparison with that in normal mice. No significant difference was observed in arginase activity in the sera of mice receiving other therapeutic strategies. CONCLUSION: Our data indicates that IP-10 immunotherapy is a promising strategy for breast cancer treatment, as shown in the 4T1-implanted BALB/c mouse model. However, the L. tarentolae-(IP-10-EGFP) live delivery system requires dose modifications to achieve efficacy in the applied regimen (six injections in 3 weeks). Our results indicate that the arginase assay could be a good biomarker to differentiate tumoral tissues from the normal ones.
Animals ; Arginase ; Breast Neoplasms ; Chemokine CXCL10 ; Female ; Genetic Therapy* ; Genome ; Humans ; Immune System ; Immunotherapy ; Interferons ; Leishmania ; Lizards ; Lung ; Macrophages ; Mice ; Neoplasm Metastasis ; Parasites ; Plasmids ; Transfection ; Tumor Burden

OBJECTIVETo investigate the inhibitory effects and its mechanism of lyophilized powder of fresh Gekko Chinenis (GCLP) on H22 hepatocarcinoma growth and angiogenesis in vitro.

METHODSThe transplant tumor model of H22 hepatocarcinoma in mice was established. Thirty mice were randomly divided into three groups, the cisplatin group, the GCLP group and the control group, they were treated respectively with intraperitoneal injection of cisplatin 1 mg/g, oral administration of GCLP in a dose of 1.2 g/kg, and equal volume of saline, the medication was given for 20 times totally. The anti-tumor activity was evaluated by tumor tissue weighing, the cell apoptotic rate was detected by TUNEL method, the micro-vessel density in tumor tissue was determined by Weidner method, the protein expression of vascular endothelin growth factor (VEGF) and basic fibroblast growth factor (bFGF) were detected by S-P immunohistochemistry.

RESULTSGCLP could obviously inhibit the hepatocarcinoma growth, induce tumor cell apoptosis, and reduce micro-vessel density in tumor tissue through down-regulating VEGF and bFGF protein expression.

CONCLUSIONSGCLP can effectively inhibit the growth of H22 hepatocarcinoma and angiogenesis. Its mechanism might be related to the down-regulation of the protein expression of VEGF and bFGF.

Angiogenesis Inhibitors ; pharmacology ; Animals ; Drugs, Chinese Herbal ; pharmacology ; Liver Neoplasms, Experimental ; blood supply ; pathology ; Lizards ; Materia Medica ; Mice ; Neovascularization, Pathologic ; Tumor Cells, Cultured