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Biomedical subjects

S Slătineanu

Publications and source records attributed to S Slătineanu.

At least 19 recordsLinked to original sources
PubMed1986

Evidence for the involvement of cerebral renin-angiotensin system (RAS) in stress analgesia.

Studies concerning variations of the central renin-angiotensin system (RAS) during immobilization stress in rats have shown a significant increase in renin-like activity in the hypothalamus and fronto-parietal cortex, together with a definite decrease in the hypophysis and pineal gland. The resultant stress analgesia is blocked by the previous administration of naloxone and saralasin (angiotensin II antagonist). The intracerebral administration of renin and angiotensin II produces an increase in latencies to thermoalgesic stimuli; this is reduced, as is immobilization stress, by naloxone and saralasin. Both chemical hypophysectomy obtained by dexamethasone pretreatment as well as surgical epiphysectomy block the stress-induced analgesia. The experimental data obtained argue in favour of the participation of the cerebral RAS in stress analgesia through the indirect mechanism of release of opioid peptides.

Analgesia↗
PubMed1980

Influence of angiotensin II on dog pineal serotonin content.

Intravenous infusion of angiotensin II in different concentrations for 2 h induced an increase in the serotonin contents of pineal gland, hypothalamus and brain stem in dogs. The maximal stimulatory effect was obtained with a concentration of 50 ng angiotensin II/kg body wt./min. Results are interpreted with regard to the concept of an intrinsic isorenin-angiotensin system and its implications at the level of brain nervous tissue and accessory glands. Experimental data indicating the possible existence of positive and negative feedback relationships between the brain isorenin-angiotensin system and serotonin metabolism in the pineal gland, are presented.

Angiotensin II↗
PubMedDate not supplied

[Current data on the extrarenal renin-angiotensin system].

After a brief historical incursion regarding SRA of renal origin we present the main extrarenal angiotensin-forming enzymes, starting with isorenin, tonin, cathepsin D şi G and ending with the conversion enzyme and chymase. This is followed by a short presentation of data concerning tissue SRA in the heart and vessels, brain and neurocranial accessory glands, cortico-suprarenalian and gonadal glandular territory. In the end we refer to the relations between circulating SRA of renal origin and the tissue extrarenal one, underlying the fact that the two SRA components cooperate and constitute a unitary hormonal system, towards the regulation of the major functions of the organism and the maintenance of the main homeostatic equilibria. While the circulating SRA of renal origin is acutely activated to contribute to the accomplishment of short term homeostatic reactions, tissue SRA, in paracrine or autocrine ways, exerts loco-regional adaptive actions of long duration.

Animals↗
PubMedDate not supplied

[The evolution of the natural-killer-dependent cytotoxic activity during normal pregnancy].

The fetus was compared to an allograft because paternal antigens are also expressed. Even the analogy is not a real one, the main steps of the rejection phenomenon are relevant for the understanding of the complex materno-fetal interactions as the large granular lymphocytes are the first immune cells which invade the graft. Due to the important role of NK cells in the cell mediated immune response, the purpose of this paper was to assess the NK cell dependent cytotoxicity during normal pregnancy. The study was performed on a test group of 52 normal gravidas, in the Ist, IInd and IIIrd trimester and a control group of 20 healthy nonpregnant women with similar age and parity averages. The cytotoxic activity of the NK cells was measured in a 51Cr release assay against K 562 cell line. The results were expressed as the cytotoxicity index (%) and showed a statistically significant decrease for all gravidas compared to controls, mostly for the IInd trimester. The trend of the NK cytotoxic activity during normal pregnancy suggests the deep involvement of the NK cells in the mechanisms acting at the fetomaternal interface.

Adult↗
PubMedDate not supplied

Abdominal pregnancy. Case report, review of the literature.

Abdominal pregnancy (AP) is a rare form of ectopic pregnancy (EP). It is a medical emergency because of high maternal and fetal morbidity and mortality. Early diagnosis is essential. Surgery is indicated as soon as the diagnosis is made. We present a case with AP in the third trimester with malformed fetus and left ovarian tumour. The fetus has been extracted at 33 weeks gestational age; the placenta and the ovarian tumour have been removed five weeks later. Pathology showed corpus luteum with hemorrhage, serous cystadenoma, follicular cyst. The fetus died, the woman successfully recovered.

Adult↗
PubMedDate not supplied

[NK cells in the physiology of the fetomaternal relationships].

The NK cells are large granular lymphocytes that are found as approximately 2-15% of the global peripheral lymphocytes. As endometrial granulocytes, they represent 70% of the decidual leukocytes during the first trimester of pregnancy, with a progressive decreasing until term. The complex actions of these numerous and active cells, consist in: 1) placental regulation and control, based on the receptors for the HLA--G and HL--C antigens, that are trophoblast specific and act as universal inhibitors of the NK cells; 2) secretion of a large range of cytokines as IL-1, TNF alpha, IL-8, TGF, IFN gamma, GM-CSF, CSF1 which regulate the trophoblastic proliferation, differentiation and invasion; 3) removal of abnormal trophoblastic cells, which may appear in such a proliferating cell population; 4) infectious protection of the placental unit, due to their unspecific cytotoxic effect. In conclusion, the NK lymphocytes have important implications in the formation of the decidua, as the maternal side of the fetomaternal interface and they are deeply involved in the evolution of normal pregnancy concerning the nutritional, hormonal and immunologic aspects.

Cytokines↗
PubMedDate not supplied

[Phyllodes tumor. The experience of the 4th Obstetrics-Gynecology Department].

The experience of the IVth Obstretrics Gynecology Department. Between the 1st of January 1994 and the 1st of November 2001 587 operations have been performed as treatment of breast tumors in the IVth Obstetrics and Gynecology Department. The phyllodes tumor has been diagnosed in 11 cases (1.8% of the benign breast masses). The genesis is unknown. Local trauma, pregnancy, lactation, high estrogenic levels have been suggested to have an influence upon the tumoral development. The most common aspect is a round, hard, unpainful breast mass. The diameter is variable (1 to 45 cm). The mammogram shows a well defined, high density, smooth contour opacity. A four degree classification has been described. Specific evolution features may involve local recurrences and metastasis. The surgical treatment is mandatory but radiotherapy, chemotherapy and endocrine treatment protocols have been brought up.

Adult↗
PubMedDate not supplied

[Practical aspects in diagnosis and treatment of benign breast lesions].

We analyzed 444 patients operated on in our clinic. Triple test diagnosis is the modern trend. Surgical treatment is not justified in all cases. When needed, partial mastectomy is commonly used. Surgical principles must be respected for good cosmetic results. Histopathology only certifies the diagnostic.

Adult↗
PubMedDate not supplied

[Malignancy risk in some benign mammary lesions].

We analyzed retrospectively 821 patients operated on in our clinic for benign mammary lesions and for breast cancer. Histopathology identified in some cases associated benign and malign lesions. Atypical hyperplasia is considered significant risk factor for malignancy. Women in this category need close surveillance.

Biopsy, Needle↗
PubMedDate not supplied

[Reasons for conservative treatment in breast cancer].

We analyze 112 patients with breast conservative treatment operated in our clinic in the last 5 years. Breast preservation surgery represented 30.35% of all cases treated for breast cancer in this interval of time. In other 63 situations conservative treatment was attempted but finally given up due to justified motivations and decision for mastectomy was adopted as optimal. Rigorous selection of patients for conservative surgery was our care. Tumor size, excisional margins, nodal status were the main criteria. Correlation with breast volume, age, patient's opinion were also important. Preservation of breast in women interested and cosmetic results were the purposes of our attitude. Breast conserving therapy may be indicated only respecting the oncological principles and close surveillance of patients is obligatory.

Adult↗
PubMedDate not supplied

[Assessment of prognostic factors in breast cancer].

Prognostic factors predict the long term outcome of treatment, recurrence rate and overall survival. Treatment decision is based on assessment of prognostic factors. They are classified as clinical (age, menopausal status, tumoral growth rate, inflammatory signs), histological (tumoral stage, pathological type, grading, tumoral necrosis, lymph nodes status, margins status) and biological factors (steroidal receptors pattern, ploidy etc). There are tumor markers currently evaluated, being considered conventional and new markers that are not usually evaluated. Patients with negative lymph node will show no recurrences after surgery and/or radiotherapy in 70% of the cases. Factors with specific prognostic value are used for deciding on the therapeutic strategy in negative axillary node cases.

Biomarkers, Tumor↗
PubMedDate not supplied

[Breast conservative surgery].

Breast conservative therapy is considered an adequate therapeutical method for early stage breast cancer. Breast conservative treatment consists of partial mastectomy, axillary dissection and radiotherapy. Patient selection is based on clinical, histological and individual factors. The frozen sections examination provides prompt differentiation between benign/malign lesions and precise assessment of the oncologic margins of the specimen. Preoperative marking of nonpalpable breast lesion with hook wire represents a progress for breast conservative treatment. Sentinel lymph node biopsy represents an alternative to axillary dissection, in order to reduce subsequent morbidity.

Breast Neoplasms↗