Biomedical subjects

Maria Sajin

Publications and source records attributed to Maria Sajin.

6 recordsLinked to original sources

PubMed2006

Expression of the high-mobility group protein HMGI(Y) in gestational trophoblastic diseases.

The high-mobility group protein HMGI(Y) is a member of a family of nonhistone chromosomal proteins, which have been implicated in the regulation of inducible gene transcription, integration of retroviruses into chromosomes, and induction of neoplastic transformation and metastatic progression in cancer cells. The human trophoblast is a tissue that shares proliferation capacity and invasiveness with neoplastic tissues, but in which these processes are tightly regulated. Recently we could show that HMGI(Y) is expressed in the normal human placenta, where it is localized in the nuclei of villous cytotrophoblast, in the anchoring villi at the implantation site and in extravillous (intermediate) trophoblast invading the maternal decidua. In contrast, the majority of the nuclei of the villous syncytiotrophoblast, a terminally differentiated tissue, was negative. The purpose of this study was to investigate the expression pattern of HMGI(Y) in gestational trophoblastic diseases (GTD), which has not been studied so far. To analyze the expression of HMGI(Y), we performed immunohistochemistry on a total of 29 cases of GTD, including 21 hydatidiform moles and 8 choriocarcinomas. Hydatidiform moles showed a positivity for HMGI(Y) in villous cytotrophoblast and in areas of the trophoblast proliferations on the villous surface; villous syncytiotrophoblast was negative. The choriocarcinomas showed strong immunoreactivity in all cases. The expression pattern of HMGI(Y) in gestational trophoblastic diseases indicates that it might play a role in the pathogenesis of GTD and might be potentially useful as an additional diagnostic marker for such lesions.

Adult↗

PubMed2005

Postmenopausal choriocarcinoma: a case report.

Postmenopausal uterine choriocarcinoma is very rare and benefits of curative chemotherapy. We present here the case of 62-year-old women with uterine bleeding. Emergency surgery revealed a uterine tumor and histopathology findings were consistent with choriocarcinoma. Immunohistochemistry tests confirmed betahCG and cytokeratin expression by malignant cells, thus establishing the positive diagnosis.

Blood Vessels↗

PubMedDate not supplied

Dantrolene protects neurons against kainic acid induced apoptosis in vitro and in vivo.

Apoptotic cell death induced by kainic acid (KA) in cultures of rat cerebellar granule cells (CGC) and in different brain regions of Wistar rat pups on postnatal day 21 (P21) was studied. In vitro, KA (100-500 microM) induced a concentration-dependent loss of cell viability in MTT assay and cell death had apoptotic morphology as studied by chromatin staining with propidium iodide (PI). In vivo, twenty-four hours after induction of status epilepticus (SE) by an intraperitoneal KA injection (5 mg/kg) we quantified apoptotic cells in hippocampus (CA1 and CA3), parietal cortex and cerebellum using PI staining and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) technique. We report that dantrolene, a specific ryanodine receptor antagonist, was able to significantly reduce the apoptotic cell death in CGC cultures and in hyppocampal CA1 and parietal cortex regions. Our finding can be valuable for neuroprotective therapy strategies in patients with repeated generalized seizures or status epilepticus.

Animals↗

PubMedDate not supplied

[Gall bladder carcinoma].

The study comprises a lot of 989 cholecystectomies for gall bladder lithiasis performed in the First Surgery Clinic of the University Emergency Hospital of Bucharest throughout three years and a half (2000-June 2003). Half out of them--493 cases (50%)--were laparoscopic interventions. All of the organ material was submitted to pathological examination. In 4 cases (0.4%), all females, the pathologist surprisingly unveiled the diagnosis of gall bladder carcinoma in the 3rd stage of evolution for all of them. None of the observations presented beforehand or per operative hints suggestive for a malignant affliction. Three patients associated multiple pathology such as acute pancreatitis (obs No2), common bile duct lithiasis (obs No3) and cholecysto-duodenal fistula (obs No4). The postoperative evolution of gall bladder neoplasia of the 4 cases studied was extremely fast, the patients soon being readmitted in our clinic for jaundice, subhepatic tumoral mass and liver metastasis, on average after 31 days after cholecystectomy. That was why the reinterventions were confined to limit at exploratory laparotomies only.

Aged↗

PubMedDate not supplied

[Perilesional changes in gastric ulcer].

UNLABELLED: Our work aims to provide a descriptive analysis of the perilesional changes associated with gastric ulcer, which were observed on a group of patients diagnosed by endobiopsy. MATERIAL AND METHOD: The group comprised 90 persons with clinical diagnosis of gastric ulcer, who were investigated both endoscopically and pathologically. The gastric fragments were processed for light microscopy (HE, PAS, alcian blue stains). RESULTS: Besides the typical gastric ulcer, the morphological exam identified gastric ulcer combined with chronic gastritis, complete and incomplete intestinal metaplasia, gastric atrophy, hyperplasia as well as dysplasia. A malignant gastric ulcer was confirmed in 6 cases. A number of 10 patients displayed malignant lesions (gastric carcinoma, intestinal and diffuse types) developed independently of the gastric ulcer. CONCLUSIONS: The identification of various morphological changes in the gastric mucosa adjacent to the ulcer allows a correct evaluation, with respect to the diagnosis and the evolution. The presence of these lesions, correlated with the existence of Helicobacter pylori, means major risk factors for gastric carcinogenesis.

Adult↗

PubMedDate not supplied

[Pneumocystis pneumonia in infants].

The goal of this study is to present the clinical and evolutive features of Pneumocystis infection (PCP) in infants admitted in our clinic. We summarise these aspects from 17 cases (10 male and 7 female infants), admitted between 1st January 2004 and 31st May 2005. PCP infection is rare. It represents 1,5/1000 children (17 cases of 11328 total patients) admitted in our hospital. The risk factors for PCP were age between 6 weeks and 6 months (average 3,38 months) low birth weight (average = 2428 grams), low weight for age, prolonged hospital admission (88,23% of the 17 infants were abandoned in nursery). Only one of them had HIV infection and none presented neoplastic disease. The most prominent clinical aspect was tachypnea (average 78 breath/minute, maximum 130). 16 (94,11%) had difficult breathing with chest in-drawing and flaring of ala nasi. 14 (82,35%) had generalised cyanosis. Only two (11,72%) infants had fever. Radiologic aspects were evocative, with diffuse pulmonary involvement in almost all cases (88,23%). 6 infants (35,29%) had pneumothorax and 2 (11,76%) presented pneumomediastinum. Positive diagnosis was made by microscopic examination of secretions from endotracheal tube aspiration (Grocott methenamine silver stain and Romanowsky stain). 14 infants were ventilated with a good outcome--12 surviving infants (85,7%). All infants had a full course of intravenous Co-trimoxazole. The deceased infants had more risk factors--congenital heart disease 1 case, severe cerebral palsy with organic epilepsy 2 cases. The apparent increase of PCP cases can be related to the number of abandoned children in Romanian pediatric hospitals and nurseries.

Anti-Infective Agents↗