dr. fereydoon sargolzaei aval

 Lung cancer has the highest frequency among cancers worldwide. It is the leading cause of cancer-induced death in industrialized countries. Abnormal glycosylation of cell surface and extracellular matrix glycoconjugates are among the most critical issues in neoplasia.

 This present study aimed to detect N – acetyl glucosamine (GlcNac) and L- fucose (L-fuc) containing glycoconjugates in lung cancer.

 In this cross-sectional study, we selected paraffin blocks belonging to 25 patients with lung cancer from their pathology files at the Ali-Ebne Abitaleb Hospital, Zahedan, Iran. Six µm sections were obtained from the blocks and stained with Hematoxylin-Eosin (H-E) and lectin histochemistry (UEA and SBA lectins). Alcian Blue pH 2.5 was used as a counterstain; lectins were diluted up to 10µg/ml, and DAB was used as a chromogen. Histochemical grading was conducted blindly according to staining intensity to lectins (0-3). The data was collected and analyzed by the Mann-Whitney U test, using SPSS.

 Statistical analysis showed that there was a significant difference between inflammatory mucosa of the bronchial tree and all types of lung cancer (i.e., adenocarcinoma and squamous cell carcinoma, as well as small and large cell lung carcinoma) according to staining intensity to SBA and UEA lectins (P < 0.001). Our results showed that there were many different patterns of reaction to SBA and UEA lectins between all types of lung cancer cells and epithelial cells of the bronchial tree.

 Staining intensity and pattern of reaction to lectins were different between all types of lung cancer cells and epithelial mucosa.

Regeneration of bone defects remains a challenge for maxillofacial surgeons. The objective of this study was to assess the osteogenic potential of octacalcium phosphate (OCP) and bone matrix gelatin (BMG) alone and in combination with together in artificially created mandibular bone defects.

In this experimental study Forty‑eight male Sprague–Dawley rats (6–8 weeks old) were randomly divided into four groups. Defects were created in the mandible of rats and filled with 10 mg of OCP, BMG, or a combination of both (1/4 ratio). Defects were left unfilled in the control group. To assess bone regeneration and determine the amount of the newly formed bone, specimens were harvested at 7, 14, 21, and 56 days postimplantation. The specimens were processed routinely and studied histologically and histomorphometrically using the light microscope and eyepiece graticule. The amount of newly formed bone was quantitatively measured using histomorphometric methods. Histomorphometric data were analyzed using SPSS software. Mean, standard deviation, mode, and medians were calculated. Tukey HSD test was used to compare the means in all groups. P < 0.05 was considered as statistically significant (i.e., 5% significant level).

In the experimental groups, the new bone formation was initiated from the margin of defects during the 7–14 days after implantation. By the end of study, the amount of newly formed bone increased and relatively matured, and almost all of the implanted materials were absorbed. In the control group, slight amount of new bone had been formed at the defect margins (next to the host bone) on day 56. The histomorphometric analysis revealed statistically significant differences in the amount of newly formed bone between the experimental and the control groups (P < 0.001).

Combination of OCP/BMG may serve as an optimal biomaterial for the treatment of mandibular bone defects.

Regeneration of bone defects remains a challenge for maxillofacial surgeons. The present study aimed to compare the effects of octacalcium phosphate (OCP) and the combination of octacalcium phosphate/gelatin (OCP/Gel) on mandibular bone regeneration in rats

In the present study, 36 male Sprague-Dawley rats were used. The animals were randomly assigned to the following experimental groups: OCP (n=12), OCP/Gel (n=12), and the control group (n=12). Defects were created in the rat mandibles and filled with 10 mg of OCP and OCP/Gel disks in the experimental groups. In the control group, however, no substance was administered. Samples were taken on days 7, 14, 21 and 56, respectively, after the implantation. Sections (5 µ) were prepared and stained by H&E. The sections were studied, and the volume fraction of newly formed bone was measured by Dunnett's T3 test based on the significance level (P=0.05).

In the experimental groups, the new bone formation began from the margin of defects 7‒14 days after the implantation. During the healing process, the newly formed bone healed a larger area of the defects and grew structurally. In the control group, the defects were primarily filled with dense connective tissue, and only a small amount of new bone was formed. The present study showed a statistically significant difference in the volume of newly formed bone between the experimental groups and the control group (P<0.001).

OCP/Gel composite can be beneficial in the healing process of mandibular bone defects.

Repair of bone defects is challenging for reconstructive and orthopedic surgeons. In this study, we aimedto histomorphometrically assess new bone formation in tibial bone defects filled with octacalcium phosphate (OCP),bone matrix gelatin (BMG), and a combination of both. A total of 96 male Sprague Dawley rats aged 6-8 weeks weighing 120-150 g were randomly allocatedinto three experimental (OCP, BMG, and OCP/BMG) and one control group (n=24 in each group). The defects inexperimental groups were filled with OCP (6 mg), BMG (6 mg), or a combination of OCP and BMG (6 mg, 2:1 ratio).No material was used to fill the defects in the control group and the defect was only covered with Surgicel. Sampleswere taken on days 7, 14, 21, and 56 after the surgery. The sections were stained with hematoxylin-eosin (H&E) andassessed using light microscopy. In our experimental groups, bone formation was started from the margins of the defect towards the centerwith an increasing rate during the study period. Moreover, the formed bone was more mature. Bone formation in ourcontrol group was only limited to the margins of the defect. The newly formed bone mass was significantly higher inthe experimental groups (P=0.001). OCP, BMG, and OCP/BMG compound enhanced osteoinduction in long bones.Level of evidence: III

The healing of bone defects in the craniofacial region is an important clinical issue. We aimed to compare the effects of octacalcium phosphate (OCP) and the combination of OCP/gelatin (OCP/Gel) on calvarial bone regeneration in rats.
In this study, 72 male Sprague Dawley rats were randomly assigned to the OCP (n=24), OCP/Gel (n=24), and control groups (n=24). Lesions with a diameter of 9 mm were created in the parietal bone and were filled with 9-mg OCP and OCP/Gel disks. In the control group, no substance was implanted in the defect. Sampling was performed on days 10, 14, 21, and 28 after the implantation. After tissue processing, 5-µm sections were prepared and stained by hematoxylin and eosin (H&E) stain. The sections were studied, and the volume fraction of the newly formed bone was assessed by Kruskal-Wallis test at a significance level of 0.05.
In the experimental groups, new bone formation was detected at the margins of the defects 10 days after the implantation. With the progression of the healing process, the newly formed bone covered greater areas of the defects and developed a more mature structure. In the control group, the defects were primarily filled with a dense connective tissue with small islands of new bone. The results of histomorphometric assessments showed that the volume of the newly formed bone in the experimental groups had a significant statistical difference with that in the control group (P The OCP/Gel composite can be useful in the healing process of calvarial bone defects.

The healing of bone defects in the craniofacial region is an important clinical issue. We aimed to compare the effects of octacalcium phosphate (OCP) and the combination of OCP/gelatin (OCP/Gel) on calvarial bone regeneration in rats.
In this study, 72 male Sprague Dawley rats were randomly assigned to the OCP (n=24), OCP/Gel (n=24), and control groups (n=24). Lesions with a diameter of 9 mm were created in the parietal bone and were filled with 9-mg OCP and OCP/Gel disks. In the control group, no substance was implanted in the defect. Sampling was performed on days 10, 14, 21, and 28 after the implantation. After tissue processing, 5-µm sections were prepared and stained by hematoxylin and eosin (H&E) stain. The sections were studied, and the volume fraction of the newly formed bone was assessed by Kruskal-Wallis test at a significance level of 0.05.
In the experimental groups, new bone formation was detected at the margins of the defects 10 days after the implantation. With the progression of the healing process, the newly formed bone covered greater areas of the defects and developed a more mature structure. In the control group, the defects were primarily filled with a dense connective tissue with small islands of new bone. The results of histomorphometric assessments showed that the volume of the newly formed bone in the experimental groups had a significant statistical difference with that in the control group (P The OCP/Gel composite can be useful in the healing process of calvarial bone defects.

Cisplatin is a platinum-based drug widely used for the treatment of different cancers. Cell surface glycoconjugates play an important role in cell-cell interactions. The present investigation was carried out to study the toxic effects of double dose injection of cisplatin on cell surface glycoconjugates in rat as an experimental model.
In this experimental study, 45 adult male Sprague Dawley rats were used. Experimental group E1 and experimental group E2 received two repeated dose of 2.5 mg/kg and 5 mg/kg of cisplatin, respectively in the beginning of the first and fifth week of the experiment. After 8 weeks of injection, rats were killed. Tissue samples were removed and prepared sections were stained with H&E, PNA (Peanut agglutinin), and UEA (Ulex europaeus agglutinin) methods. Prepared microscopic slides were utilized for both histopathological and morphometrical studies. The obtained data were analyzed by ANOVA and Tukey tests using SPSS.
Cisplatin administration induced a significant decrease in internal and external diameters of seminiferous tubules in the experimental groups compared to the control one (P Cisplatin induces a dose-dependent morphological changes of germinal epithelium and extensive changes in distribution pattern of fucose- and Gal/GalNac-containing glycoconjugates in seminiferous epithelium in rats.

Cisplatin is a platinum based antineoplastic drug, which is widely used for treatment of solid tumors. The present investigation was carried out to study the nephrotoxic effects of double dose injection of cisplatin in rats, as an experimental model.
In this experimental study, 45 adult male Sprague Dawley rats with average weight of 200±30 g were randomly divided into two experimental (n=30) and one control (n=15) groups. Rats of experimental groups received two repeated doses of cisplatin intraperitoneally (2.5 mg/kg, experimental group E1 & 5 mg/kg, experimental group E2) in the beginning of first and fifth week of the experiment. Eight weeks after injection, rats of all groups were given deep anesthesia and killed. Blood samples were collected directly from their hearts for biochemical evaluation. Tissue samples were removed and prepared sections were stained with H&E, PAS, Masson trichrome, and PNA methods. Prepared microscopic slides were utilized for both histopathological and morphometrical studies. Collected data were analyzed by ANOVA and Tukey post hoc test using SPSS.
Cisplatin administration induced a significant decrease in urinary space diameter of renal corpuscles in the experimental groups compared to the control group. This ultimately led to the urinary space obstruction in up to 95% of nephrons in experimental groups (P Cisplatin induces acute tubular necrosis and urinary space obstruction and some other morphological changes in rat kidney, in a dose dependent manner.

Stem cells are self-renewing and undifferentiated cell types that can be differentiate into functional cells. Stem cells can be classified into two main types based on their source of origin: Embryonic and Adult stem cells. Stem cells also classified based on the range of differentiation potentials into Totipotent, Pluripotent, Multipotent, and Unipotent. Multipotent stem cells have the ability to differentiate into all cell types within one particular lineage. There are plentiful advantages and usages for multipotent stem cells. Multipotent Stem cells act as a significant key in procedure of development, tissue repair, and protection. Multipotent Stem cells have been applying in treatment of different disorders such as spinal cord injury, bone fracture, autoimmune diseases, rheumatoid arthritis, hematopoietic defects, and fertility preservation.

Benign prostate hyperplasia (BPH) is a common urological disorder in elderly men. Phytotherapy is frequently used to alleviate the symptoms of this condition. The present study investigated the effect of Withania coagulans extract (WCE), which is known to have antioxidant, anti-inflammatory, antihyperglycemic, and anti-cancer properties, on testosterone-induced BPH in rats. Forty Wistar rats were divided into five groups (each n = 8): the control group, the untreated BPH group, and three WCE-treated groups (WCE250, 500, and 1000). BPH was induced with 3 mg/kg subcutaneous injections of testosterone propionate for four weeks. WCE was concomitantly administrated by oral gavage. At the end of the induction schedule, the animals were sacrificed and their prostate glands were dissected, weighed, and fixed for histological examination (H&E and proliferating cell nuclear antigen [PCNA] staining). Half of each sample was prepared for measurement of malondialdehyde (MDA) and total antioxidant capacity (TAC) levels in the prostate. The present study revealed that BPH caused elevation of MDA levels, suppression of TAC levels, and increased PCNA expression in the prostate gland. Interestingly, in a dose-dependent manner, WCE caused decreased MDA levels and increased TAC levels in the prostate gland, compared to the untreated BPH group. Histopathological examinations showed a reduction in PCNA expression in the prostate epithelium of the WCE animals. W. coagulans inhibits the development of BPH can be useful for the treatment of this condition.

The aim of the present study was to evaluate the protective effects of gadolinum on pneumotoxic effects of styrene in rats as an experimental model. In this experimental study a total number of 40 adult male Sprague Dawley rats that weighed 200 ± 13 g were randomly divided into five groups: i. styrene (St, N=10), ii. styrene+gadolinium chloride (GdCl3, N=10), iii. control (N=10), iv. GdCl3 (N=5) and v. normal saline (Nor.Sal, as a solvent of GdCl3, N=5). Normal saline, as a sham control group, was otherwise treated identically. Rats from the experimental groups were exposed to St in an exposure chamber for 6 days/week, 4 hours/day for up to 3 weeks. At the end of the experiment, rats from all groups were killed by deep anesthesia. Their lungs were removed, then fixed in formalin and weighed. Tissue samples were processed routinely and sections stained by the hematoxylin and eosin (H&E) and periodic acid Schiff (PAS) methods. We measured the thicknesses of the respiratory epithelia and interalveolar septa. Obtained data were analyzed by ANOVA, the Tukey test and the paired t test. Shedding of apical cytoplasm in the bronchiole was a prominent feature of the St group. PAS staining revealed histochemical changes in goblet cells in the epithelium of the St group. While there were no significant changes in lung weights and respiratory epithelial thicknesses between all studied groups, statistical analysis showed a significant alteration in the thickness of interalveolar septa in the St and St+GdCl3 group compared to the control groups (P<0.001). Styrene induced structural and histochemical changes in bronchiole, interalveolar septa and alveolar organization in the rats’ lungs. Gadolinium appeared to partially reduce the toxic effects of styrene on the lungs.

Although previous studies have confirmed the beneficial effects of human umbilical cord matrix stem cell (hUCM) transplantation post myocardial infarction (MI), but this stem cell resource has no potential to induce angiogenesis. In order to achieve the process of angiogenesis and cardiomyocyte regeneration, two required factors for cardiac repair agents were examined namely; hUCM and VEGF on an infarcted heart. The main objective of this research is to investigate the combinatory effect of dhUCM and VEGF transplantation on an infarcted heart. 45 min of ligating the left anterior descending coronary artery, the MI-induced animals received 50 μl PBS, 5 μg VEGF, 5×106 hUCM cells alone, combined with 5 μg VEGF and 5×106 differentiated hUCM cells alone or combined with 5 μg VEGF through intramyocardial injection. MI group, without hUCM and VEGF served as the control group. Left ventricular function and angiogenesis were also evaluated. After eight weeks post MI, there were significant rise in left ventricular ejection farction in dhUCM+VEGF group compared to the other treated and non-treated groups (P<0.05). Fibrosis tissue was markedly lower in the dhUCM+VEGF and hUCM+VEGF groups compared to the other treated and non-treated groups (P<0.05). Despite these benefits, vascular density in dhUCM+VEGF group was not markedly different compared to VEGF and hUCM+VEGF groups. The transplanted hUCM and dhUCM cells survived and migrated to the infarcted area. Our findings demonstrated that the dhUCM cells transplantation combined with VEGF were more efficient on an infarcted heart.

The present day challenge is how to obtain germ cells from stem cells to treat patients with cancer and infertility. Much more efforts have been made to develop a procedure for attaining germ cells in vitro. Recently, human umbilical cord-derived mesenchymal stem cells (HUMSCs) have been introduced with higher efficacy for differentiation. In this work, we tried to explore the efficacy of HUMSCs and some effective products of placental cells such as transforming growth factors. This study is aimed to optimize a co-culture condition for HUMSCs with placental cells to obtain primordial germ cells (PGCs) and reach into oocyte-like cells in vitro. In this experimental study, HUMSCs and placental cells were co-cultured for 14 days without any external inducer in vitro. Then HUMSCs were assessed for expression of PGC markers; Octamer-binding transcription factor 4(OCT4),Tyrosine-protein kinase Kit (CKIT), Stage specific embryonic antigen 4 (SSEA4), DEAD (Asp-Glu-Ala-Asp) box polypeptide 4(DDX4) and oocyte specific markers; Growth differentiation factor-9(GDF9), Zona pellucida glycoprotein 3(ZP3). The pertinent markers were assessed by immunocytochemistry and Q-PCR. Co-cultured HUMSCs with placental cells (including amniotic and chorionic cells) presented Oct4 and DDX4, primordial germ cells specific markers significantly, but increment in expression of oocyte-like cell specific markers, GDF9 and ZP3 did not reach to statistically significant threshold. Placental cell supplementsTransforming growth factor (TGF α, β) and basic fibroblast growth factor (bFGF) in a co-culture model can provide proper environment for induction of HUMSCs into PGCs and expression of oocyte-like markers.

Furcal perforation is an undesirable complication that may occur during root canal therapy and seriously compromises the prognosis of endodontic treatment. The prognosis of furcal perforation repair depends on the prevention of bacterial infection of the perforation site. Thus, use of a biocompatible material for complete sealing of the perforation site is critically important. This study aimed to compare the microleakage of mineral trioxide aggregate (MTA) and octacalcium phosphate (OCP) for furcal perforation repair. This experimental study was conducted on 70 human mandibular molars with divergent roots, intact furcation site and completely formed apices. The teeth were randomly divided into 4 groups of two experimental (n=30), one positive control and one negative control group (n=5). The furcation floor was then perforated. In the first and second experimental groups, furcation perforations were repaired with OCP and MTA, respectively. In the positive control group, the perforation was left untreated and in the negative control group no furcal perforation was created. The access cavity in all groups was filled with Cavit. The teeth were stored in 100% humidity for 48h. Root apices were sealed with sticky wax and the entire external surface of teeth except for 0.5 mm around the perforation site was covered with two coats of nail polish. The specimens were immersed in India ink for 4 days and then sectioned in half buccolingually. The sections were separated and dye penetration was evaluated using a stereomicroscope at 25X magnification. Obtained data were analyzed using independent t-test. No microleakage was observed in the negative control group. In the positive control group, the dye had completely penetrated into the walls. The amount of dye penetration was 1.64 and 1.22 mm in the OCP and MTA groups, respectively. Statistical analysis of data revealed that the sealability of MTA was significantly greater than that of OCP (P<0.0001). OCP cannot be an acceptable alternative to MTA in terms of sealability.

The purpose of this study was to evaluate the tissue responses to octacalcium phosphate (OCP) and calcium hydroxide (CH) used as direct pulp capping (DPC) materials in cat teeth. 72 premolar teeth of 9 cats were selected and divided into 3 groups (Two experimental and one control group). After the cats had been anesthetized، the pulp were exposed and capped directly with OCP، CH or no capping material as control group. The cavities of all three groups were filled with Glass ionomer cement (GI). Histological evaluations were performed at two، four and eight weeks after pulp capping. After tissue preparation procedures، paraffin blocks were prepared. After preparation and staining of the sections، the relevant variables were measured by optical microscope. The results were analyzed using Mann-Whitney U and Chi-square tests (α =0. 05). Two weeks after pulp capping، all specimens in three groups showed mild to sever inflammation. The formation of hard tissue (dentinal bridge) at in the exposed areas of the experimental groups was more noticeable for calcium hydroxide than that of octacalcium phosphate group. These differences were statistically significant (P<0. 001). At four weeks، hard tissues were observed in both groups which were more evident for the CH group and there were statistically significant difference between two experimental groups (p<0. 003). At eight weeks، continuous hard tissues were observed in both groups and there were no statistically significant difference between them (P>0. 05)، but hard tissues continuity were better for in the OCP than that of the CH. It seems that the formation of hard tissue in CH because of its porosities had a worse percentage in sealing of the pulp than the OCP.

The anatomy of the palmar vascular arches and their variations، being one of the most challenging anatomical regions for reconstructive surgeon. During a routine dissection of a male adult cadaver in dissection hall of zahedan university of medical sciences، a complex، unilateral and rare variation in the pattern of blood supply to the palm of the right hand was observed. The history of the individual and cause of the death is not known. In this cadaver there was an incomplete superficial palmar arterial arch had no contribution from the radial artery. The superficial palmar arch giving only one common palmar digital artery، that supply second interdigital space and then it terminated by giving rise to a common trunk for princeps pollicis and radialis indicis arteries. Absence of the second and third common palmar digital artery with the contiguous sides of the third and forth interdigital spaces supply by the second and third palmar metacarpal arteries from the deep palmar arch respectively. The third palmar metacarpal artery giving rise to a branch which supplies the medial side of the little finger. Having knowledge of the variations of vascular patterns resulting from a number of developmental errors could provide an important source of information for Anatomists، Radiologist، reconstructive and vascular surgeons.

Accurate knowledge of the normal and variant arterial pattern of the upper extremities is important for reparative surgeons. During dissection of a male cadaver, a common trunk taking origin from the third part of the axillary artery was observed. This common trunk at first gave rise to the usual branches of this part of the artery and then descended into the arm. In the arm, it gave rise to the main branches of the brachial artery and then continued as the inferior ulnar collateral artery. In this specimen, a rare pattern of auxiliary artery branching was observed. Numerous alternatives that exist during the formation of upper limb vessels seem to be responsible for anomalous arterial branching patterns.