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The current study aimed to assess the antiulcerogenic impact of mesenchymal bone marrow stem cells (BMMSCs) against gastric ulcer induced by the use of piroxicam in rats and to compare this effect with the antiulcer drug “Pantoloc ®” proton pump inhibitors. The study included histological, histochemical, immunohistochemical and ultrastructural examination in stomach of rats in different study groups. In the ulcerated group, the glandular region of the stomach displayed clear mucosal lesions occurring as perforations along the stomach axis. In addition, stomach displayed degeneration of surface mucous cells accompanied by pyknosis, vacuolation among parietal cells in ishmus region, basal region with vacuolated chief cells and karyolitic nucleus of parietal cells. Moreover, Stomach sections of ulcer model rats showed intensive immunoreactivity to cytokeratin 20, Cox 2 and PCNA. Findings of the present study have shown that BMMSCs have an ameliorative effect against piroxicam-induced gastric ulcer in rats. Collectively, the proposed work has shown that BMMSCs have a curative capacity as an antiulcer due to their high antioxidant activity. Further studies are required in molecular levels to understand the mechanism of action during treatment.

Background: Pomegranate peel extract (PPE) is known to possess bioactive compounds such as phenolics and flavonoids, considered among the more potent antioxidants and anti-inflammatory sources.Aims: This study was designed to evaluate PPE activity's protective effect as a natural therapeutic against peptic ulcers induced by Brexin.Methods: 40 rats were divided into four groups: Control group: ten rats received normal saline treatment; Brexit group: ten rats received a single oral dose of Brexit to induce the stomach ulcer; Antodine group: ten rats received Antodine (50 mg/kg) as a commercial drug for the peptic ulcer treatment once for two weeks following a peptic ulcer; Pomegranate group: ten rats of the group received PPE (43 mg/kg) treatments. Histological, histochemical, immunohistochemical techniques were used to detect histopathological damages in stomach rats in all groups.Results: The histopathological results showed that PPE treatments following Brexin-induced peptic ulcer ameliorated histological degenerative changes in the gastric glandular. Chief and surface mucous cells that are lining gastric mucosa were regained when compared with the other groups. The histochemical results showed that PPE treatment following ulcer provided an improvement in the secretion and distribution of the polysaccharides in the epithelial cells when compared with the other groups. Also, immunohistochemical results indicated a significant decrease in immunoreactivity of cytokeratin-20, cyclooxygenase-2, and proliferating cell nuclear antigen (PCNA) in epithelial cells of rats in ulcer-model when compared with the other groups.Conclusion: PPE revealed its antiulcer activity and is recommended as a natural remedy against gastric mucosal injury induced by Brexin.

Objectives: The aim of the study was to assess the beneficial effect of ferulic acid (FA) compared to 5-flurouracil (5FU) on colon cancer caused by 1,2-dimethylhydrazine (DMH). Method: Rats were divided into four groups (Control, FA, 5FU and DMH groups). The DMH group was injected subcutaneously once a week for 15 weeks. FA group was orally administered three times per week for 4 weeks with dose of 50 mg/kg. The 5FU group was intraperitoneally injected once per week with dose of 50 mg/kg for 4 weeks. Results: Histopathological, immunohistochemical and molecular studies have been undertaken. The mucosa of the induced colon cancer was significant infiltrated by mononuclear cells and hemorrhage. Also, there was improper shape of the crypts with partial loss of polarity. The muscularis mucosa was infiltrated by pleomorphic cells. The mucosa and submucosa have indeed been invaded by a gland-like set of cells, congested blood vessels with extravagance of mononuclear cells, which are concentrated in the mucosa that fills the corium of the connective tissue. Moreover, colon sections of the DMH treated rats showed intensive immunoreactivity to Ki67, CK20 and weak immunoreactivity to P53 and Caspase-3. Moreover, FA could significantly (p

The proximal, intermediate, and distal convoluted tubules of the neprhon of Podarcis (= Lacerta) taurica were examined by electron microscopy. Proximal tubule cells have large, apical cytoplasmic protrusions and microvilli interpreted to function in urate secretion. Adjacent cells are bound apically by tight junctions and desmosomes but interdigitate in their basal region. This situation is repeated in the other tubules with significant differences in intercellular space width. The basal surfaces bear numerous cytoplasmic processes. The intermediate tubule has proximal and distal segments each with dark, ciliated, and light cells, the cuboidal dark cells with dense cytoplasm constituting the main bulk of the wall. As the cells of the proximal and distal segments resemble those of the proximal and distal convoluted tubules, respectively, the intermediate tubule is considered as a transition region. The ciliated cell body has two broad processes extending from the lumen, one to the basement membrane and one to a foot process of a light cell. The light cell is surrounded by dark and ciliated cells. It does not reach the lumen, but contacts the basement membrane through a process running below a ciliated cell to form a mushroom-shaped structure in tubule cross-section, the light cell process forming the stalk and a ciliated cell the cap. The cilia probably propel the glomerular filtrate towards the distal convoluted tubule. This latter tubule has initial, middle, and terminal zones, all nonciliated but with different lumen widths and cell shapes.

In female Podarcis taurica the kidney collecting tubule always consists entirely of mucous-secreting cells. In males it has a seasonally variable sexual segment and a non variable mucous-secreting segment. In April the sexual segment is composed of columnar cells with cytoplasm rich in ribosomes and Golgi bodies and apical clusters of large vesicles with fibrous contents. The terminal region of the sexual segment also has pillar-shaped cells resembling those of the mucous-secreting segment. By May the accumulation of apical vesicles reaches a maximum, and many cells have apparently extruded their secretion into the lumen. In July all the cells are pillar shaped with dilated endoplasmic reticulum but with few apical vesicles. In September the sexual segment has some cells resembling those of the mucous-secreting segment and others the sexual segment pillar cells in April. It is suggested that during sexual activity in the spring the sexual segment secretes a spermatozoon-nutrient protein but subsequently reverts to mucous secretion. The non variable mucous-secreting regions in both males and females consist of mucous, intermediate, and dark cells. Mucous cells have apical masses of closely packed droplets, whereas dark cells have dense cytoplasm and small, loosely associated apical vesicles. Intermediate cells have some dark cell features but mucous cell apical vesicles. The dark, intermediate, and mucous cells probably represent activity states of a single type. The mucous secretion is interpreted as a protective material which lines the urinary passage and coats the secreted solid urates. Elaborated intercellular spaces in the mucous-secreting regions may indicate a water absorption capacity in urine concentration.

Background: clarithromycin is a semisynthetic macrolide antibiotic, exhibits broad-spectrum activity against gram-positive and gram-negative aerobes. Macrolides are bacteriostatic antibiotics that inhibit protein biosynthesis via reversible binding to the bacterial 50S ribosomal subunit. Macrolides are able to cross placenta and reach the fetus. Aim of the work: the present study is focused on evaluating the effects of antimicrobial drug, clarithromycin on the kidneys of pregnant rats. Material and methods: clarithromycin is orally given to the treated groups of the pregnant rats once daily at different periods of gestation by gastric tube at a dose of 45 mg/kg/day. The excised kidneys were dissected, processed and stained with H & E, PAS, Masson’s trichrome, Feulgen reaction and anti-CD68 immunohistochemical stain then followed by morphometric measurements and statistical analysis. The kidneys were also preserved for DNA fragmentation assay. Results: this study revealed that clarithromycin administration especially to pregnant rats showed different histopathological and histochemical changes in kidney tissues and cellular DNA. Also immunohistochemical anti-inflammatory marker CD68 showed positive reactivity in all treated groups. Conclusion: The presence of histopathological and histochemical changes revealed nephrotoxicity in the pregnant rats after administration of the antimicrobial drug, clarithromycin.

Introduction: macrolide antibiotics are a class of potent and well established antimicrobials that also possess anti-inflammatory and/or immunomodulatory properties. Because of their size, lower levels of macrolides are able to reach the developing fetuses. Materials and method: the pregnant rats were orally administered with clarithromycin at early and late gestational periods. The 20 day-old fetuses were dissected for excision of the kidney. Half of the kidney was processed and stained with H & E, PAS, Masson’s trichrome and Feulgen techniques then followed by morphometric measurements and statistical study. The other half of the kidney was preserved for DNA fragmentation assay.Results: This study revealed that clarithromycin administration to pregnant rats showed different histopathological, histochemical and DNA changes in the kidneys of their fetuses. Conclusion: Administration of the antimicrobial agent; clarithromycin at early and late gestational periods exhibits nephrotoxicity in the developing fetuses.

Clarithromycin, a new macrolide antibiotic, is effective in the management of a wide range of clinical problems including outpatient treatment of community-acquired pneumonia, shortening the course of peptic ulcer disease associated with Helicobacter pylori infection and curing previously resistant respiratory infections in immune-compromised patients. The present study is planned to study the effect of clarithromycin on the pregnant female rats and their fetuses during the last gestational period stage. This study includes the effect of clarithromycin on therate of abortion, malformation of fetuses, skeletal, histological changes and DNA fragmentation of liver cells of pregnant rats and their fetuses. In the present study two groups of pregnant animals were used. The first group received distilled water from 15th to 19th days of gestation and used as control and sacrificed at 20th day of gestation. The other group is orally administered with 45mg/kgclarithromycin from 15th to 19th days and sacrifices at 20th day of gestation (the therapeutic dose). The obtained results showed a significant decrease in maternal body weight gain and increase in the rate of abortion, resorption and growth retardation of fetuses.Fetuses of the treated group showed severe lack of ossification on the skull bones, phalanges and sternum bone as well as shortness in the ulna and radius bones. Histological studies of pregnant rats revealed congestion and dilatation of the central vein of the liver lobules and fatty degeneration of the hepatocytes with severe DNA fragmentation.In 20 day-fetuses, there were a marked increase of necrotic hepatocytes associated with increased average of megakaryocytes and periportal leukocytic infiltration.

Background: Different studies have demonstrated that aging clearly affects male fertility which may be attributed to the androgen deficiency. Reactive oxygen species play a central role in the pathophysiology in the aged-related decrease in male fertility. Some antioxidants have ameliorative effects on different aged organs. Material and Methods: The present study aimed to evaluate the effects of some antioxidants on aged testes. Ten adult and fifty aged male albino rats (Rattus albus) were divided into six groups. Group I (control adult), Group II (control aged), Group III (Vitamin E-treated aged), Group IV (Vitamin C-treated aged), Group V (Zinc sulphate-treated aged), Group VI (Vitamin E-, Vitamin C- and Zinc Sulphate-treated aged). Vitamin E, Vitamin C and Zinc were administrated in doses 2.52 mg, 3.15 mg and 0.693 mg, respectively. Histological and ultrastructural evaluation of the testes were examined as well as Follicle stimulating hormone (FSH), Luteinizing hormone (LH), total and free testosterone levels in the serum were measured. Counting the number of litters per animal and the teratogenic effects was noticed. Results: Giving zinc alone or combined with other antioxidants gave better ameliorative effects on the testicular structure and hormonal levels in the serum. No teratogenic effects of the aged animals`offspring were noticed.

Tamoxifen (TAM) is a potent anticancer agent known to interrupt the enhanced estrogen activity of malignant mammary gland cells, The mechanism of tamoxifen’s anti-tumor activity is primarily due to its anti estrogen action. Female Swiss albino mice were used in the present study and divided into:- normal control group, two Ehrlich ascites carcinoma (EAC) control groups [treated interaperitonealy(IP) and subcutaneously (Sc)], tamoxifen treated only group, tamoxifen pre treated then EAC (S.C) injected group and tamoxifen pre treated then EAC (I.P) injected group. The present results showed a significant decrease in tumor volume and a significant increase in the survival time in the pre-treated group compared to untreated group. There was a pathological change in the uterine tissues of the tamoxifen treated mice in the form of squamous metaplasia and dysplasia of glandular epithelial . The kidney tissues showed a minimal pathological change in the form of a focal renal lesion in the renal tubular epithelium. in conclusion the present study showed that tamoxifen has a prophylactic effect against experimental mammary carcinoma. And exerts some side effects on the histopathological structure of the uterine and kidney tissues. Key words: Tamoxifen, Mammary carcinoma, experimental, prophylactic, side effect.