Search PubMed⌕ Search

Biomedical subjects

S V Ivanov

Publications and source records attributed to S V Ivanov.

At least 37 records · Page 2Linked to original sources
PubMed2000

[Organic neuroses as psychosomatic problem].

To study a role of psychogenic and somatogenic factors in the development of organic neuroses, 302 patients were examined: 199 with cardioneurosis and 103 with irritable-bowel syndrome (IBS) with mental and subclinical somatic pathology or without it. Two types of organic neuroses were distinguished: a conversive one--somatized hysteria (psychogenically determined subsyndromal hysterohypochondriac phobic or affective reactions with clear difference of algesic and autonomic disorders from symptoms of the somatic pathology, with polymorphism of the involved organic systems); and autonomic neurosis that is a central link in the structure of psychosomatic correlations, which, on the one hand, was overdone by clinical manifestations of the somatic pathology (mitral prolapse--35%, ventricular extrasystoles--12%, etc. in cardioneurosis, lymphoid hyperplasia of colonic mucosa--100%, dysbiopsis--10%, etc. in IBS); on the other hand, autonomic neurosis is a somatopsychic component of psychopathologic disorders of anxious-phobic, affective and hypochondriac sphere (panic disorder--59%, generalized anxiety--15%, anxious depression--18% in cardioneurosis, melancholic or hypochondriac cyclothymic depressions--76%, hypochondriac development--24% in IBS). Psychosomatic correlations were considered in autonomic neurosis in the context of some continuum, where somatic disorders amplified by functional disorders are on the one pole and true mental pathology including somatoautonomic disorders--on the other pole. Recommendations have been formulated on therapy of organic neuroses with anxiolytics, antidepressants and atypical neuroleptics in combination with somatotropic drugs.

Adult↗
PubMed1999

[Therapy of cardio-neurotic diseases in general practice: clinical experience with atarax].

An open study of efficiency and safety of atarax (hydroxisine) enrolled 55 outpatients (23 males and 32 females, mean age 45.91 +/- 1.91) with generalized anxious and somatoform disorders running as cardioneurosis as well as nosogenic reactions (maladaptation), manifestations of cardiovascular pathology (acute myocardial infarction, angina of effort functional class II-III, postinfarction cardiosclerosis, essential hypertension in 5, 13, 2 and 5 patients, respectively). The patients received atarax for 28 days (daily dose 50 mg). The course was completed in 54 patients. In 47 of them, the overall score value by Hamilton Anxiety Scale dropped by 10 scores, the reduction being more obvious in patients with somatic anxiety. Hydroxysine is well tolerated and safe both in patients with somatic pathology and those with cardiovascular disorders.

Adult↗
PubMed1999

[Chronic anxiety and phobic disorders with persistent agoraphobia: clinical and follow-up study].

There were studied 2 groups of the patients with a diagnosis of agoraphobia (according to ICD = 10). The first group included 34 patients which didn't use a specialized psychiatric service; the second one included 25 patients which needed an active therapy under conditions of psychiatric hospital. Dynamics of a disease was investigated by the method of retrospective (3 years) and following prospective (3 years) evaluation. The first group was characterized by relatively favourable outcome of chronic anxious-phobic disorders (APD) with the phenomena of a stable agoraphobia (5.8% of patients with a decrease of social adaptation): a limited agoraphobic avoidance (2 cases in the average), a rare and only psychogenic exacerbation (23 cases). Comorbid disorders were presented as minor depression (53%), somatophormic disorders (single isolated cardialgias and the conversive disorders--28%), personal disorders of hyperthimic (53%) and hysteric (35.5%) type. The second group was characterised by relatively worse outcome of chronic APD with the phenomena of a stable agoraphobia (32.0% of the patients with a decrease of social adaptation), that was associated with more generalized avoidance behaviour (more than 2 cases), with a gradual increase of both the severity of panic attacks and agoraphobia in limits of either periodic long-term aggravations (46%) or a continuous progredient course (29%). As compared with the 1-st group the second group was also characterised by significantly higher average number in a month of the panic attacks (4.9 + 1.1 vs 2.4 + 0.4; p < 0.01) and hospitalization (2.5 + 0.6 vs 0.2 + 0.2 + 0.1; p < 0.05) during all period of prospective observation. More severe comorbid disorders were revealed: slow-progredient schizophrenia (20% vs 0% in the first group; p < 0.01), a major depressive disorder (28% vs 3%; p < 0.01), dysthymic disorder (32% vs 3%; p < 0.05); personal disorders were presented mostly by the deviations of schizoid type (59%).

Adaptation, Psychological↗
PubMed1999

[Peculiarities of diagnosis and treatment for diabetic feet].

Multifactorial pathogenesis of the "diabetic foot" syndrome suggests advisability to single out some clinical pathogenetic forms, depending on basic causes of the lesions: due to neuropathy, osteoarthropathy, neuro-ischemic factors. The authors has developed the algorithm which enables to diagnose various forms of the syndrome and differentiate the treatment. The most important treatment modalities include unloading and podiatric measures as well as surgery, systemic antibacterial and glucolytic therapy. Conservative or surgical antiischemic measures are indicated only in demonstration of the degree of the ischemic damage in the lower extremities by Doppler ultrasonography and measurement of local oxygenation of the skin. The combined differentiated treatment in 142 patients with diabetic lesions of the feet has resulted 97.2% favourable outcomes in neuropathy and 86.5% successful outcomes in neuroischemic damages. Local oxygenation of dorsal skin of the foot (< 20 mm Hg) indicates that amputation above the ankle is highly probable.

Amputation, Surgical↗
PubMed1999

[Helicobacteriosis of the operated stomach in peptic ulcer].

After Billorth-II resection of the stomach for ulcer the contamination of the stump with Helicobacter pylori (HP) was detected in 73.7% of the cases, for ulcer of the duodenum--in 81.8% of the patients. At later terms after selective proximal vagotomy (SPV) all the patients were HP-positive, after SPV with draining operations 92.3% of the patients were HP-positive. The degree of inflammatory alterations in the mucosa was proportional to the degree of its bacterial dissemination. The HP contamination of the gastric mucosa after operation had no marked influence on the clinical course of the remote postoperative period. Spontaneous elimination of HP was observed in 42.9% of the patients with the developing achlorhydria of the operated stomach.

Duodenal Ulcer↗
PubMed1998

Down-regulation of transmembrane carbonic anhydrases in renal cell carcinoma cell lines by wild-type von Hippel-Lindau transgenes.

To discover genes involved in von Hippel-Lindau (VHL)-mediated carcinogenesis, we used renal cell carcinoma cell lines stably transfected with wild-type VHL-expressing transgenes. Large-scale RNA differential display technology applied to these cell lines identified several differentially expressed genes, including an alpha carbonic anhydrase gene, termed CA12. The deduced protein sequence was classified as a one-pass transmembrane CA possessing an apparently intact catalytic domain in the extracellular CA module. Reintroduced wild-type VHL strongly inhibited the overexpression of the CA12 gene in the parental renal cell carcinoma cell lines. Similar results were obtained with CA9, encoding another transmembrane CA with an intact catalytic domain. Although both domains of the VHL protein contribute to regulation of CA12 expression, the elongin binding domain alone could effectively regulate CA9 expression. We mapped CA12 and CA9 loci to chromosome bands 15q22 and 17q21.2 respectively, regions prone to amplification in some human cancers. Additional experiments are needed to define the role of CA IX and CA XII enzymes in the regulation of pH in the extracellular microenvironment and its potential impact on cancer cell growth.

Amino Acid Sequence↗
PubMed1998

Distribution of CCR5-delta 32 gene deletion across the Russian part of Eurasia.

32-bp inactivating deletion in the beta-chemokine receptor 5 (CCR5) gene, common in Nothern European populations, is associated with reduced HIV-1 transmission risk and delayed disease progression. We have studied the deletion distribution in many populations in Eurasia by polymerase chain reaction analysis of 531 DNA samples representing West and East Siberian, Central Asian, and Far Eastern parts of Russia. An unusually high frequency (11.1%) of the deleted variant in natives of West Siberia, of Finno-Ugrian descent, was observed. Furthermore, the deletion was infrequent in indigenous populations of Central Asia, East Siberia, the Russian Far East, and Canada. We conclude that the delta(ccr5) distribution is limited primarily to Europeans and related western Siberian Finno-Ugrian populations, with a sharp negative gradient toward the east along the territory of Russian Asia.

Adolescent↗
PubMed1998

In silico-initiated cloning and molecular characterization of a novel human member of the L1 gene family of neural cell adhesion molecules.

To discover genes contributing to mental retardation in 3p- syndrome patients we have used in silico searches for neural genes in NCBI databases (dbEST and Uni-Gene). An EST with strong homology to the rat CAM L1 gene subsequently mapped to 3p26 was used to isolate a full-length cDNA. Molecular analysis of this cDNA, referred to as CALL (cell adhesion L1-like), showed that it is encoded by a chromosome 3p26 locus and is a novel member of the L1 gene family of neural cell adhesion molecules. Multiple lines of evidence suggest CALL is likely the human ortholog of the murine gene CHL1: it is 84% identical on the protein level, has the same domain structure, same membrane topology, and a similar expression pattern. The orthology of CALL and CHL1 was confirmed by phylogenetic analysis. By in situ hybridization, CALL is shown to be expressed regionally in a timely fashion in the central nervous system, spinal cord, and peripheral nervous system during rat development. Northern analysis and EST representation reveal that it is expressed in the brain and also outside the nervous system in some adult human tissues and tumor cell lines. The cytoplasmic domain of CALL is conserved among other members of the L1 subfamily and features sequence motifs that may involve CALL in signal transduction pathways.

Amino Acid Sequence↗
PubMed1998

The chromo and SET domains of the Clr4 protein are essential for silencing in fission yeast.

Heritable inactivation of specific regions of the genome is a widespread, possibly universal phenomenon for gene regulation in eukaryotes. Self-perpetuating, clonally inherited chromatin structure has been proposed as the explanation for such phenomena as position-effect variegation (PEV) and control of segment determination and differentiation in flies, X-chromosome inactivation and parental imprinting in mammals, gene silencing by paramutation in maize and silencing of the mating-type loci in yeasts. We have now found that the clr4 gene, which is essential for silencing of centromeres and the mating-type loci in Schizosaccharomyces pombe, encodes a protein with high homology to the product of Su(var)3-9, a gene affecting PEV in Drosophila. Like Su(var)3-9p, Clr4p contains SET and chromo domains, motifs found in proteins that modulate chromatin structure. Site-directed mutations in the conserved residues of the chromo domain confirm that it is required for proper silencing and directional switching of the mating type, like SET domain. Surprisingly, RNA differential display experiments demonstrated that clr4+ can mediate transcriptional activation of certain other loci. These results show that clr4 plays a critical role in silencing at mating-type loci and centromeres through the organization of repressive chromatin structure and demonstrate a new, activator function for Clr4p.

Amino Acid Sequence↗
PubMed1998

[Mastering surgical treatment methods for patients with paralytic laryngeal stenosis].

Endoscopic laryngoplasty used in reconstructive surgery of the upper respiratory tracts for paralytic laryngeal stenoses is maximally sparing in relation to laryngeal structures. Mastering of the skill of the endoscopic intervention necessitated application of the device for training surgeons. The device simulates the operative situation of microsurgical manipulations on the larynx.

Endoscopy↗
PubMed1997

[Secretory function of stomach in long term followup period after selective proximal vagotomy].

Regional proteolysis and average daily levels of acidity in different parts of the stomach in long term follow up periods (up to 16 years after the surgery) are analysed. The depressed levels of the secretion remained during all the long term period. In older patients with isolated SPV the level of acidity is decreasing, mainly in distal parts of the stomach by the 11th-16th year after the surgery. There is an intestinal type of digestion in the parts of the stomach that do not contain hydrochloric acid. The intestinal type of digestion is more expressed after the SPV combined with gastrojejunal anastomosis. A high level of acid secretion was demonstrated in 9.7% of cases after the SPV.

Aged↗
PubMed1997

[Intragastric proteolysis after vagotomy in perforative duodenal ulcer].

The examination of intragastric proteolysis in patients operated on the perforative duodenal ulcer has been performed in 80 patients in the period up to 16 years after the surgery. The selective proximal vagotomy was performed in 65 of the patients, the trunk vagotomy--in 15 of the patients. In 55 patients the vagotomy was combined with ulcerrraphy, in 25 patients--with draining operations. The 30-35% decrease of the intragastric pepsin proteolysis was detected in patients after the vagotomy. There was no any signs of restoration of the suppressed proteolytic activity in the time period up to 16 years after the surgery. The draining operations lead to suppression of pepsin proteolysis in long-term period after the surgery and to its substitution with digestion with the pancreatic proteinases.

Duodenal Ulcer↗
PubMed1996

Molecular characterization of the complex sex-chromosome heterochromatin in the rodent Microtus chrotorrhinus.

The sex chromosomes of Microtus chrotorrhinus are unusually large compared to those of other mammals, comprising about 20% of the karyotype and containing substantial amounts of constitutive heterochromatin. Previous studies have described two highly repeated DNA families (MSAT-160 and MSAT-2570) that localize to this heterochromatin (Modi, 1992, 1993c). The present report describes a third satellite DNA family (termed MSAT-21) in M. chrotorrhinus that is also located in the sex heterochromatin. This repeat consists of diverged copies (average similarity = 75%) of a tandemly repeated 21-mer. Southern blotting of MSAT-21 revealed that although some higher order (5-20 kb) repeats do exist, none has spread throughout an appreciable portion of the genome. Pulsed field gel experiments indicated that most of the larger arrays (50-700 kb) of all three satellite families are distributed across numerous size classes, suggesting that the three repeats are interspersed with one another in this heterochromatin. Analysis of a boundary between MSAT-21 and MSAT-160 showed that the junction monomers of each satellite are intact and that a pentanucleotide has apparently been transferred from MSAT-21 to MSAT-160 via recombination. Sequence comparisons of MSAT-160 with another rodent satellite and with the U3 region of the Rous sarcoma virus (RSV) long terminal repeat identified inverted repeats and similarities with viral enhancer domains in the rodent sequences. Additionally, the MSAT-21 consensus was found to be similar to the R region of RSV, suggesting a retroviral ancestor for these rodent repeated DNA families.

Animals↗
PubMed1996

[The psychopathological structure of depressions].

The theoretical model of depression has been developed on the basis of 275 psychopathological observations of the affective disorders. The primary symptom complexes of hypothymia and alienation are considered to be the obligatory components of the syndrome structure. Depressions are ranged into the system with variants according to comorbid correlations between hypothymia and alienation. The anesthetic depression (in which the signs of vital affective suppression and alienation are characterized by total symptomatological comorbidity) considered to form the center of such system. The variations of affective disorders (vital, existential, "self-torture" depressions, "depression without depression") in which the comorbidity phenomenon is just partly realized and in which one of the symptom complex is totally expressed have the marginal position.

Depression↗
PubMed1995

[Long-term results of selective proximal vagotomy in perforating pyloroduodenal ulcers].

The authors set forth the indications for operation of selective proximal vagotomy (SPV) combined with closure of perforating pyloroduodenal ulcer and note the peculiarities of SPV technique which they apply. They examined 71 persons in periods of up to 7 years after surgery and 41 patients in periods of up to 16 years. The regional acid-proteolytic activity of the stomach was studied. It was established that SPV lowered the aggressiveness of the gastric contents to a safe level. The digestive activity of the gastric juice did not increase in the studied periods. Operation for suturing of a perforating ulcer in the pyloroduodenal zone in combination with SPV causes a high frequency of stable recovery of patients in the late-term periods. The incidence of recurrent peptic ulcer in follow-up periods of up to 16 years was 5.4%.

Duodenal Ulcer↗