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Biomedical subjects

V I Vasil'ev

Publications and source records attributed to V I Vasil'ev.

At least 19 recordsLinked to original sources
PubMed2006

Optimization of solubilization and purification procedures for the hydroxylase component of membrane-bound methane monooxygenase from Methylococcus capsulatus strain M.

The hydroxylase component of membrane-bound (particulate) methane monooxygenase (pMMO) from Methylococcus capsulatus strain M was isolated and purified to homogeneity. The pMMO molecule comprises three subunits of molecular masses 47, 26, and 23 kD and contains three copper atoms and one iron atom. In solution the protein exists as a stable oligomer of 660 kD with possible subunit composition (alpha beta gamma)6. Mass spectroscopy shows high homology of the purified protein with methane monooxygenase from Methylococcus capsulatus strain Bath. Pilot screening of crystallization conditions has been carried out.

Bacterial Proteins↗
PubMed2006

[MALT-lymphomas in Sjogren's disease].

AIM: To develop algorithm of early diagnosis of extranodal lymphoma arising in patients with Sjorgen's disease (SD). MATERIAL AND METHODS: SD diagnosis was made in 457 patients treated in Rheumatology Institute clinic in 1999-2004, 38 (8.3%) females aged 19-82 had lymphoproliferative diseases. MALT-lymphomas were diagnosed in 15 (42.2%) patients. All the patients have undergone morphological, immunomorphological investigations of the salivary glands, postoperative material was analysed in some patients. In addition, the following investigations were made: ultrasonography of the salivary glands, lymph nodes, viscera; scintigraphy; trephine biopsy of the bone marrow; myelograms; CT of the chest, abdomena and brain; tests for monoclonal immunoglobulins in the serum and light chains in urine; biopsy of the parotid gland. Clinical, morphological and immunophenotypical characteristics of MALT-lymphomas were assessed by WHO classification. Lymphoma stages were classified according to Ann Arbor. RESULTS: Parotid glands were affected with MALT-lymphoma most frequently. Predominant were extranodal lymphomas of the parotid submandibular, minor salivary glands of the lip and lacrimal glands of stage I E-II E. Extranodal lymphoma with nodal lesion of stage IV occurred less frequently. Untreated long existing MALT-lymphomas of the parotid glands may transform into B-large cell lymphomas deteriorating SD prognosis. The presence of long-term (> 12 months) massive enlargement of parotid/submandibular salivary and lacrimal glands, massive infiltration, monoclonal immunoglobulins in blood serum and their light chains in the urine predict development of MALT-lymphoma in SD. CONCLUSION: In SD, MALT-lymphomas develop primarily in target organs--salivary and lacrimal glands. SD patients with persistent enlargement of the parotid glands need biopsy for early detection of malignant lymphoproliferation.

Adult↗
PubMed2005

[Sicca syndrome in sarcoidosis and involvement of the salivary and lacrymal glands].

AIM: To present differential-diagnostic signs of sarcoidosis with affection of the salivary and lacrymal glands and Sjogren's disease. MATERIAL AND METHODS: The examination of 620 patients with affection of the salivary and lacrymal glands revealed sarcoidosis in 19 of them. The diagnosis was verified histologically. Clinical, serological and histological characteristics of sarcoidosis patients were compared to those of 200 patients with Sjogren's disease (SD) detected among the examinees. RESULTS: Sarcoidosis patients vs those with SD (p < 0.001) had massive enlargement of the salivary glands (84.3%) with severe xerostomy which appeared rather early (78.9%), affection of the lacrymal glands manifesting with enlargement of the palpebral region, edema of the upper eyelids (57.9%), pulmonary lesion (78.9%), cranial nerves (47.4%), skin (42%), enlargement of the intrathoracic lymph nodes (100%). CONCLUSION: In spite of the presence of mucosal dryness simulating SD, sarcoidosis of the lacrymal and salivary glands has some specific features allowing differentiation of sarcoidosis.

Adult↗
PubMed2004

[Prognostic implications of mixed monoclonal cryoglobulinemia in Sjogren's disease].

AIM: To specify the risk of severe systemic manifestations and transformation into malignant lymphoma in Sjogren's disease (SD) patients with monoclonal mixed cryoglobulinemia (MMC). MATERIAL AND METHODS: A prospective study performed in 1985-1990 included 248 SD patients followed up after the initial detection of monoclonal immunoglobulins (Ig) with serum active rheumatoid factor (RF). The patients' cryoglobulins (CG) were examined. The type of CG was determined by electrophoresis in agarose gel combined with immunofixation and immunoelectrophoresis with mono-specific antisera to heavy and light Ig chains. Biopsies of the lower lip salivary glands and skin were made in all the patients with MMC and 40 patients without CG. The biopsies were studied histologically, histochemically and immunomorphologically. Clinical symptoms and prognosis were studied in all the patients observed in 1985-2000 after the initial diagnosis of MMC. In suspected lymphoma development, histological and immunophenotypical studies of lymph node, bone marrow biopsies, trephine biopsies were made as well as myelograms, Ga-67 scintigraphy, CT of the thoracic and abdominal cavities. The total of clinical, morphological, immunophenotypical and cytogenetic characteristics of lymphoma was estimated by REAL classification. RESULTS: CG at first examination was detected in 50 (20.2%) of 248 patients with SD. 20 (40%) of 50 patients were diagnosed to have MMC with monoclonal IgMchi (19) and IgA (1) in the serum with RF activity. Ten (50%) patients with MMC developed lymphoma after 10.9 +/- 3.3 years, on the average. In the absence of CG lymphoma developed in 5.5% (p < 0.001). B-cell intoxication in patients with diffuse lymphadenopathy, foci of lymphoid infiltration in the lungs, ulcers of the crus and such indices as stab neutrophilic shift, monocytosis, hypoproteinemia with hypogammaglobulinemia, disappearance of the RF, CG, low CIC level, immunodeficiency of monoclonal Ig and appearance of the protein BJ in the urine are markers of developing large B-cell immunosecreting lymphomas. Highly aggressive diffuse LCL resulted in death of 70% SD patients with MMC; 30% died of immunocomplex cryoglobulinemic vasculitis. 10-15-year survival of SD patients after detection of MMC was 50%, free of CG - 97% (p < 0.001). CONCLUSION: MMC is a definite serological marker of developing lymphoma and ulcerative-necrotic vasculitis in SD. In detection of MMC in SD patients it is necessary to prescribe early pathogenetically validated treatment before development of life threatening manifestations.

Adolescent↗
PubMed2000

[Treatment of erectile dysfunction in cases of venous and corporovenous insufficiency of phallus].

A total of 230 patients of different age with impaired venous drainage of penis cavernous bodies were examined. Test with intracavernous injection of papaverin, dopplerography of the vessels and cavernosometry were employed. To treat venous and corporovenous insufficiency, it is suggested to make a resection of the deep dorsal vein, ligation of the superficial and circular veins with suturing tunica albuginea. In negative result of the surgery viagra in a done 50 (100) mg is recommended or penile implants.

3',5'-Cyclic-GMP Phosphodiesterases↗
PubMed1998

[Clinical and laboratory characteristics of patients with Sjogren's disease lasting from young age].

AIM: Characterization of Sjogren's disease (SD) with onset at early age basing on the comparison of two patient groups--with the disease onset at the age under 30 and over 50. MATERIALS AND METHODS: Clinical, ophthalmological and stomatological examinations were performed in 31 SD patients who developed the disease at the age under 30 (group 1) and over 50 (group 2). RESULTS: In group 1 the disease started with parotitis in 42.8% of cases, dysfunction of secreting epithelial glands was rare, functional activity of exocrine glands was normal, dysproteinemia (high total protein levels, hypergammaglobulinemia, hypoalbuminemia) and immunological defects (high levels of circulating immune complexes, rheumatoid factor, antinuclear factor) were more pronounced. At retrospective analysis not only a decline of functional activity of the salivary and lacrimal glands but also appearance of systemic symptoms were registered. CONCLUSION: Development of systemic SD symptoms at young age necessitates early pathogenetic therapy employing corticosteroid, cytostatic and other drugs.

Adolescent↗
PubMed1990

[Herniotomy as a cause of male infertility].

The article deals with 8 cases of iatrogenic obstruction of the vas deferens after herniotomy for inguinal hernia, the consequence of which was sterility. Anastomosis of the vas deferens was formed in 6 patients by means of precision microsurgical manipulations; the spermatological indices improved markedly in 3 of them, which was evidence of restored passage of the semen. To avoid injury to the spermatic cord, the author recommends microsurgical techniques in treatment of the hernial sac in children with congenital inguinal hernia.

Adult↗
PubMed1990

[Cryoglobulinemia in Sjögren's syndrome].

As many as 130 patients with Sjögren's disease (SD) were examined for blood cryoglobulins during 1977-1982. Cryoglobulinemia was discovered in 25 (19.2%) patients with SD. The clinical manifestations such as severe xerostomia, appreciable increase of the parotid salivary glands, hepatosplenomegaly, purpura, polyneuropathy, lesions of the lungs and kidneys were mostly detectable in SD patients with cryoglobulinemia. Ten cryoprecipitates of SD patients with cryoglobulinemia showed the monoclonal immunoglobulins IgMk-9 and IgA-1. All the patients had high titers of antinuclear antibodies and 90% manifested antinuclear Ro/La antibodies. Over the 5-year period. SD patients with cryoglobulinemia manifested the growth of hepatosplenomegaly, ulcerous-necrotic vasculitis, polyneuropathy, polyneuritis, cerebral vasculitis, lesions of the lungs and kidneys. The development of the grave systemic manifestations of the disease was attended by a decrease of immunological activity and the rise of inflammatory activity. The 5-year survival of SD patients with cryoglobulinemia was 64% against 98% in SD patients without cryoglobulinemia (p less than 0.001).

Adult↗
PubMed1989

[Cryptorchism and its surgical treatment].

545 operations were conducted in the clinic in various forms of cryptorchidism. Downward transposition of the testis after Keetley-Torek-Gertsen was the operation of choice. The author was the first to perform one-stage transposition of both testes with the use of microsurgical techniques in bilateral cryptorchidism. The modern principles of nonoperative and operative treatment of cryptorchidism are discussed and the necessity for early operative treatment (no later than 2 years) in substantiated. To study the results of treatment according to the form of cryptorchidism, localization of the testes, and the patients' age, the author examined the hypophyseal-testicular system and spermatogenesis in 80 patients with various forms of cryptorchidism. The study demonstrated the possibility of medical and social rehabilitation of patients in proper surgical tactics and, above al, in timely treatment.

Adolescent↗
PubMed1989

[Tuberculosis of the lungs complicated by opisthorchiasis under conditions of the extreme north].

Two hundred and sixty patients with pulmonary tuberculosis, residents of the North were subjected to multidisciplinary clinico-laboratory examination. The main group included 173 patients with tuberculosis complicated by opisthorchiasis. It was shown that the patients with the mixed pathology were characterized by more pronounced clinical signs of tuberculosis, more frequent disorders in the functions of the liver and pancreas and lower immunologic reactivity as compared to the patients not affected by opisthorchiasis. In the patients of the major group, activity of the alpha 1-proteinase inhibitor (alpha 1-PI) was more frequently higher and, among them, carriers of two markers i.e. Hp 2-2 and Gc 1-1 were more frequent. Factor analysis by the main components revealed that influence of helminthic invasion on biochemical and immunological reactivity of the patients with pulmonary tuberculosis was first of all brought about through the level of the serum alpha 1-PI and antiphosphatide hemagglutinins.

Aged↗
PubMed1988

[Extracorporeal therapy (hemosorption, plasmapheresis) in the combined treatment of severe forms of Sjögren's disease].

The clinical and laboratory efficacy of the combination of plasmapheresis, hemosorption disease. The combined Sjögren's disease. The combined intensive treatment led to improvement in the cases with disturbances of the peripherial and central nervous system, kidneys, blood vessels (Raynaud's syndrome), joints and muscles. The efficacy of this treatment is proved in cryoglobulinemic and hypergammaglobulinemic purpura and is comfirmed by the reliable decrease of the rheumatoid factor, circulating immune complexes. C-reactive protein and gamma globulins. A positive dynamics of the exocrine glands function and microcirculation is found.

Adult↗
PubMed1988

[Comparative evaluation of the treatment of Sjögren's syndrome with anti-rheumatic preparations].

The paper is devoted to comparative assessment of combined therapy of prednisolone, chlorambucil, chloroquine phosphate and ibuprofen at small doses and its effect on clinicolaboratory signs of Sjogren's disease in 80 patients in the course of 1 and 5 years. Patients of the control group received only local therapy of the parotid glands. The results have demonstrated that combined therapy at small doses of prednisolone and chlorambucil (5 mg + 4 mg) is an effective method of treatment of the stomatological, ophthalmological and articular manifestations of SD and is also capable of preventing the systemic signs of disease. Combined therapy with chloroquine phosphate and ibuprofen neither influenced the clinicolaboratory signs of disease nor prevented disease progression with the development of systemic signs of diseases of various degrees. Disease progression was observed in 80% of patients receiving no basic drugs or receiving chloroquine phosphate+ibuprofen while in groups of patients receiving small doses of prednisolone and chloambucil disease progression was observed in 20% only.

Adolescent↗
PubMed1987

[A positive effect of combined therapy (plasmapheresis in combination with pulse therapy) on the course of cryoglobulinemic glomerulonephritis and ulcerative-necrotic vasculitis in patients with Sjögren's disease].

The authors provided evidence of a positive effect of combined therapy (plasmapheresis in combination with pulse-therapy) on a course of cryoglobulinemic glomerulonephritis and ulcerative-necrotic vasculitis in patients with Sjögren's disease (SD). It was shown that plasmapheresis with double plasma filtration considerably decreased the cryoglobulin level in the blood whereas the level of alpha 2-globulins, C-P, RF and CIC did not change 16 hrs after the sessions of plasmapheresis. These indices significantly decreased after pulse-therapy with high doses of 6-methylprednisolone and cyclophosphamide following plasmapheresis. Combined therapy resulted in a complete epithelization of leg ulcers, regression of the symptoms of renal failure. Clinical improvement correlated with a decrease in indices of the inflammatory and immunological activity and with an increase in the cutaneous blood flow. Combined therapy can be an effective therapeutic method of SD complicated by cryoglobulinemic glomerulonephritis and ulcerative-necrotic vasculitis.

Acute Kidney Injury↗