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Carcinoma of the hand: a 20-year experience.

We reviewed our 20-year experience with cutaneous carcinoma of the hand and identified 70 cases (basal cell 23%, squamous cell 77%). The documented risk factors included solar radiation, trauma, and irradiation. Lesions were treated surgically with amputation, excision, skin graft, or flap closure, and nonsurgically with cryosurgery, curettage, 5-fluorouracil, or irradiation. The recurrence was lower with surgical treatment (3%) than with nonsurgical (33%). Regional lymphadenectomy was required in four patients for metastatic squamous cell carcinoma. Recurrence was greater (9%) and metastasis more common (38%) in patients with Marjolin's type of secondary squamous cell carcinoma than with solar-induced lesions. Cause is an important factor in outcome and should be considered in initial treatment and long-term management.

Adult↗

[A clinicopathological study on panniculitic T-cell lymphoma].

OBJECTIVE: To analyse the pathomorphology and clinical behavior of panniculitic T-cell lymphoma (PTCL) and to study the classification and name of PTCL. METHODS: Routine pathological and immunohistochemical methods were utilized to analyse 4 cases of PTCL. RESULTS: All patients presented with 1 to 3 cm diameter subcutaneous nodules accompanied by high fever. The clinical course of these patients was distinctive and progressive. All patients died within 4-9 months. Histologically, the lesions were composed of medium sized atypical cells (CD45RO+) infiltrating between fat cells, large numbers of bean bag cells (CD68+) could be observed. CONCLUSIONS: PTCL is a type of peripheral T-cell lymphoma which is highly malignant.

Adult↗

Traditional healthy Mediterranean diet: estrogenic activity of plants used as food and flavoring agents.

The Italian-style Mediterranean diet has been defined as healthy by epidemiologists and nutritionists. Besides being low fat, the Mediterranean diet is rich in biologically active minor compounds. Among these, phytoestrogens seem to have an impact on the prevention of chronic degenerative disease. It is important to understand how this occurs. The in vitro estrogenic activity of crude extracts from typical Mediterranean foods was tested using a yeast estrogen screen (YES), containing human estrogen receptor. Species belonging to Leguminosae, Apiaceae, Graminaceae, Iridaceae, Chenopodiaceae, Cruciferae and Solanaceae showed the greatest number of positive responses. These species include some foods which are traditionally widely consumed, such as beans and other legumes, tomatoes, cabbage, carrots and some cereals. The highest activity was found in the more polar extracts (aqueous, methanol and chloroform: methanol) indicating that polar compounds are mainly responsible for the estrogenic activity. This is also supported by the traditional cooking practices. According to data from in vitro tests, the estrogenic activity is present in numerous plants which are commonly used as food in the Mediterranean diet. Vegetable foods rich in phytoestrogens, as in the Mediterranean tradition, may contribute to the maintenance of health status.

Cooking↗

Involvement of mitogen-activated protein kinase activation in the signal-transduction pathways of the soya bean oxidative burst.

The oxidative burst constitutes one of the most rapid defence responses characterized in the Plant Kingdom. We have observed that four distinct elicitors of the soya bean oxidative burst activate kinases of masses approximately 44 kDa and approximately 47 kDa. Evidence that these kinases regulate production of reactive oxygen species include: (i) their rapid activation by oxidative burst elicitors, (ii) their tight temporal correlation between activation/deactivation of the kinases and activation/deactivation of the oxidative burst, (iii) the identical pharmacological profile of kinase activation and oxidant production for 13 commonly used inhibitors, and (iv) the autologous activation of both kinases and oxidant production by calyculin A and cantharidin, two phosphatase inhibitors. Immunological and biochemical studies reveal that the activated 44 kDa and 47 kDa kinases are mitogen-activated protein (MAP) kinase family members. The kinases prefer myelin basic protein as a substrate, and they phosphorylate primarily on threonine residues. The kinases are themselves phosphorylated on tyrosine residues, and this phosphorylation is required for activity. Finally, both kinases are recognized by an antibody against activated MAP kinase immediately after (but not before) cell stimulation by elicitors. Based on these and other observations, a preliminary sequence of signalling steps linking elicitor stimulation, kinase activation and Ca(2+) entry, to initiation of oxidant production, is proposed.

Cells, Cultured↗

Micronutrient fortification of plants through plant breeding: can it improve nutrition in man at low cost?

Can commonly-eaten food staple crops be developed that fortify their seeds with essential minerals and vitamins? Can farmers be induced to grow such varieties? If so, would this result in a marked improvement in human nutrition at a lower cost than existing nutrition interventions? An interdisciplinary international effort is underway to breed for mineral- and vitamin-dense varieties of rice, wheat, maize, beans and cassava for release to farmers in developing countries. The biofortification strategy seeks to take advantage of the consistent daily consumption of large amounts of food staples by all family members, including women and children as they are most at risk for micronutrient malnutrition. As a consequence of the predominance of food staples in the diets of the poor, this strategy implicitly targets low-income households. After the one-time investment is made to develop seeds that fortify themselves, recurrent costs are low and germplasm may be shared internationally. It is this multiplier aspect of plant breeding across time and distance that makes it so cost-effective. Once in place, the biofortified crop system is highly sustainable. Nutritionally-improved varieties will continue to be grown and consumed year after year, even if government attention and international funding for micronutrient issues fades. Biofortification provides a truly feasible means of reaching malnourished populations in relatively remote rural areas, delivering naturally-fortified foods to population groups with limited access to commercially-marketed fortified foods that are more readily available in urban areas. Biofortification and commercial fortification are, therefore, highly complementary. Breeding for higher trace mineral density in seeds will not incur a yield penalty. Mineral-packed seeds sell themselves to farmers because, as recent research has shown, these trace minerals are essential in helping plants resist disease and other environmental stresses. More seedlings survive and initial growth is more rapid. Ultimately, yields are higher, particularly in trace mineral-'deficient' soils in arid regions.

Biological Availability↗

Ice recrystallization inhibition in ice cream as affected by ice structuring proteins from winter wheat grass.

Ice recrystallization in quiescently frozen sucrose solutions that contained some of the ingredients commonly found in ice cream and in ice cream manufactured under commercial conditions, with or without ice structuring proteins (ISP) from cold-acclimated winter wheat grass extract (AWWE), was assessed by bright field microscopy. In sucrose solutions, critical differences in moisture content, viscosity, ionic strength, and other properties derived from the presence of other ingredients (skim milk powder, corn syrup solids, locust bean gum) caused a reduction in ice crystal growth. Significant ISP activity in retarding ice crystal growth was observed in all solutions (44% for the most complex mix) containing 0.13% total protein from AWWE. In heat-shocked ice cream, ice recrystallization rates were significantly reduced 40 and 46% with the addition of 0.0025 and 0.0037% total protein from AWWE. The ISP activity in ice cream was not hindered by its inclusion in mix prior to pasteurization. A synergistic effect between ISP and stabilizer was observed, as ISP activity was reduced in the absence of stabilizer in ice cream formulations. A remarkably smoother texture for ice creams containing ISP after heat-shock storage was evident by sensory evaluation. The efficiency of ISP from AWWE in controlling ice crystal growth in ice cream has been demonstrated.

Antifreeze Proteins↗

Oxalate content of soybean seeds (Glycine max: Leguminosae), soyfoods, and other edible legumes.

Consumption of soybeans and food products made from them is increasing because of their desirable nutritional value. However, the oxalate content of seeds from 11 cultivars of soybean showed relatively high levels of total oxalate from 0.67 to 3.5 g/100 g of dry weight. Oxalate primarily was found as calcium oxalate crystals. Thirteen tested commercial soyfoods contained between 16 and 638 mg of total oxalate per serving. These values compare to those of three other legume foods, peanut butter, refried beans, and lentils, which contained 197, 193, and 100 mg of total oxalate per serving, respectively. After oxalate has been absorbed from the diet, it cannot be metabolized and is excreted by the kidney into urine, where it binds to calcium forming an insoluble salt that may precipitate to form kidney stones. The amounts of total oxalate in soybean seeds, soy foods, and other common legume foods exceed current recommendations for oxalate consumption by individuals who have a history of calcium oxalate kidney/urinary stones. This study serves as the basis to find soybean cultivars lower in oxalate, which will have lower risk for kidney stone formation after human consumption.

Calcium Oxalate↗

Amino acid sequence of a crystalline seed albumin (winged bean albumin-1) from Psophocarpus tetragonolobus (L.) DC. Sequence similarity with Kunitz-type seed inhibitors and 7S storage globulins.

The complete amino acid sequence of winged bean albumin-1 (WBA-1) of Psophocarpus tetragonolobus (L.) DC has been determined. The protein consists of a single polypeptide chain of 175 amino acid residues, with one disulfide bond, corresponding to a molecular mass of 19333 Da. WBA-1 was found to be homologous with the Kunitz-type seed trypsin inhibitors. The similarity between WBA-1 and the trypsin inhibitors from soybean and winged bean was 38% and 28%, respectively; similarity was most marked in the C-terminal third of the sequence with identities of 47% and 37%, respectively. Significant similarity was found also between the 2S Kunitz-type proteins and the carboxy-terminal region of the 7S storage globulins, suggesting that these two groups of proteins are related and may have evolved from a common ancestral precursor. Circular dichroism measurements suggest a high content of beta sheet (52%) while secondary structure predictions based on amino acid sequence indicate a similar content and distribution of beta sheet to that found for soybean trypsin inhibitor by X-ray diffraction studies.

Albumins↗

Diazepam submicron emulsions containing soya-bean oil and intended for oral or rectal delivery.

Physically stable diazepam submicron emulsions were prepared using soya-bean oil. Diazepam concentration 4 mg/ml, suitable for rectal or oral delivery, was achieved in 20% emulsions. Mixture of egg lecithin (1.2%) and poloxamer (2.0%) has been chosen as the most suitable emulsifying agent. Composition of the emulsion may be supplemented with alpha-tocopherol and parabens. However, the system was not stable when either phenylethanol or chlorhexidine gluconate was added. Taste masking agents commonly used as food additives decreased stability of the preparation and were not efficient in elimination of a bitter taste of the drug-loaded emulsions.

Administration, Oral↗

Inflammatory bowel disease in C.B-17 scid mice reconstituted with the CD45RBhigh subset of CD4+ T cells.

Chronic inflammation developed spontaneously in the large intestine of C.B-17 scid mice restored with the CD45RBhigh subset of CD4+ T cells obtained from normal BALB/c mice. The inflammation, which extended diffusely from the cecum to the rectum, was localized to the lamina propria of mildly affected mice but became transmural in severely affected mice. Immunohistochemical and flow cytometric analyses showed that the inflammatory infiltrate contained numerous macrophages accompanied by moderate numbers of activated CD4+ lymphocytes. Some mice also had scattered multinucleated giant cells. Mucin depletion and epithelial hyperplasia resulting in glandular elongation and mucosal thickening were also consistently seen. Less frequent findings included ulceration with fibrosis, crypt abscesses, crypt loss, and granulomatous inflammation. Immunofluorescent analysis of inflamed large intestinal sections demonstrated increased epithelial expression of major histocompatibility class II antigens. The changes in the large intestine of these mice are similar to those seen in patients with idiopathic inflammatory bowel disease (Crohn's disease and ulcerative colitis). This murine model may be useful for studying mucosal immunoregulation as it relates to the pathogenesis and treatment of chronic inflammatory bowel diseases in the large intestine of human patients.

Animals↗

Clinical implications of models for recovery from alcoholism.

Various models of alcoholism are hotly championed and condemned by clinicians and theoreticians alike. Choice of model is important because it determines clinical thinking about the process of recovery from alcoholism. This paper conceptualizes the steps a patient must take to recover from alcoholism. It shows how three common models of alcoholism, the medical, the moral and the symptom, can be combined to visualize the separate tasks which must be carried out to recover from alcoholism. The distinct tasks are obscured because in clinical practice they are overlapping or simultaneous.

Alcoholism↗

Baker's asthma: still among the most frequent occupational respiratory disorders.

BACKGROUND: Baker's asthma and rhinitis are among the most frequent occupational respiratory disorders. OBJECTIVE: The aim of the study was to evaluate the frequency of work-related symptoms and the clinical relevance of sensitization to allergens in screened and symptomatic bakers. METHODS: Eighty-nine bakers participating in a screening study and 104 bakers filing a claim for compensation were examined with regard to occupational and clinical case history, lung function parameters, and sensitization to bakery allergens by skin prick tests, specific IgE analyses, and inhalative challenge tests. RESULTS: A high prevalence of respiratory disorders, abnormal lung function parameters, and sensitization to bakery allergens exists. Most frequently, bakers with workplace-related respiratory symptoms showed sensitization to wheat flour (64%), rye flour (52%), soy bean flour (25%), and alpha-amylase (21%). The correlation between these sensitizations and asthma case history and inhalative challenge test responses was significant. However, approximately 29% of the bakers with respiratory symptoms showed no sensitization to these bakery allergens, whereas 32% of the sensitized bakers in the screening group had no workplace-related symptoms. Atopic status defined by skin prick test sensitization to common allergens or elevated total IgE levels was found to be a risk factor for the development of sensitization to bakery allergens and respiratory symptoms. On the other hand, there is evidence for an increased frequency of elevated total IgE as the result of occupational allergen exposure because respective findings were observed in bakers without symptoms. CONCLUSION: Sensitization to bakery allergens seems to be the main cause of baker's asthma and rhinitis but cannot explain the asthma case history in each case. Further methods are required to objectively assume irritative pathomechanisms. Our findings indicate the necessity for an improved primary prevention of exposure to inhalative noxae in bakeries.

Allergens↗

Purification and Properties of Urease Derived from Hydrated Seeds of Jack Bean, Canavalia ensiformis (L) DC.

Urease from jack bean meal and hydrated seeds has been obtained in 25 to 33% yield with specific activity in the range of 1000 to 1070 units/mg protein. A purification of 100 to 130-fold was achieved from meal and fully soaked seeds. Use of beta-mercaptoethanol and EDTA was found essential to obtain this high yield and purity. Amino acid analysis showed all 18 amino acids commonly found in proteins. Electrophoresis of urease from soaked seeds (specific activity: 1025 units/mg protein) on a starch-gel block showed 2 peaks. Upon ultracentrifugation of urease samples having a low specific activity (less than 25% pure), the major portion of the urease was probably present in a peak having a sedimentation value of 11 to 12. With relatively pure samples (55-100% pure). S values in the range of 18 to 20 and 24 to 26 were obtained. Usually the purest samples of urease tested without any prior storage lacked the 24 to 26 S peak or the higher polymeric forms. The percentage areas under none of the ultracentrifuge peaks corresponded to the percentage purity of the sample analyzed. It is argued that the physical state of urease in the cell when associated with other seed proteins is as yet uncertain. In crude extracts, a portion of urease exists in a 12 S form but so far data on its origin and specific activity in relation to other species of urease are not available.

Journal Article↗

Characterization of monoclonal antibodies against broad bean stain and red clover mottle viruses.

Seven monoclonal antibodies (MoAbs) against red clover mottle comovirus (RCMV) and/or broad bean stain comovirus (BBSV) were characterized and used for epitope comparison of both viruses. All tested MoAbs, exclusively of IgG class, were directed to detergent-stable epitopes (metatopes and cryptotopes). Two of them were species-specific, while five others cross-reacted with both viruses to different extent. On the basis of the results of competitive ELISA, we assume different mutual position of common linear epitopes in RCMV and BBSV. They are more closely "packed up" on BBSV, while the BBSV-specific metatope is markedly dominant. The investigation of other RCMV and BBSV isolates by use of our MoAbs confirmed close relationship between both viruses and even showed that it is difficult to determine unambiguously the species of these isolates using immunochemical methods only.

Antibodies, Monoclonal↗

The enolases of ice plant and Arabidopsis contain a potential disulphide and are redox sensitive.

The simulated structures of the enolases of Arabidopsis and the common ice plant contain a pair of Cys residues in the correct orientation to form a disulphide bond. Formation of this disulphide might be expected to affect the positioning of several residues in the active site. The enzyme in crude extracts of these two plants is activated by oxidation. Apparently formation of the disulphide crosslink enhances catalysis. The enolases from tomato leaves, maize roots and castor bean embryos lack one of these Cys residues and are not redox sensitive. It seems possible that enolase is redox-regulated by a cytosolic thioredoxin system in a limited number of plant species including ice plant and Arabidopsis.

Amino Acid Sequence↗

Monoamine oxidase inhibitor dietary restrictions: what are we asking patients to give up?

BACKGROUND: Though the list of possible indications for monoamine oxidase inhibitors (MAOIs) continues to expand, many psychiatrists remain hesitant about prescribing MAOIs, citing concerns about dietary prohibitions and hypertensive reactions. Data about psychiatric patients' frequency of consumption of foods, beverages, and medications prohibited during MAOI use are lacking. METHOD: We conducted a survey of 139 psychiatric patients admitted to either an inpatient unit specializing in the treatment of mood disorders or an outpatient anxiety disorders clinic specializing in the treatment of social phobia. At inclusion, patients were not being treated with MAOIs, although they might have received such treatment afterward. All patients completed a self-report questionnaire created for this study to ascertain their consumption of food, beverage, and medication items frequently found on MAOI diet lists. Demographic and diagnostic information was also recorded. RESULTS: The most frequently used high-risk items were the hard cheeses. Ninety percent of patients reported daily or weekly consumption of some food containing cheese, while less than 1% of patients reported never eating hard cheese. Yeast products, dry sausage, corned beef, broad beans, sauerkraut, and beer were used at least monthly by more than 50% of patients. Of the intermediate-risk foods, chocolate was the most frequently consumed, with almost 30% of the patients eating some chocolate daily. Over 40% of patients reported using over-the-counter cold preparations on a monthly basis. CONCLUSION: A wide variety of tyramine-containing foods and contraindicated medications were commonly used by our patients prior to evaluation for possible MAOI pharmacotherapy. The number and diversity of frequently consumed items do not support recommendations to reduce the breadth of restrictions in MAOI diets. Individually targeted dietary assessment and education are recommended to reduce the risks of prescribing MAOIs.

Adult↗

Carbohydrate binding specificity of the basic lectin from winged bean (Psophocarpus tetragonolobus).

The carbohydrate binding specificity of the basic lectin from winged bean (Psophocarpus tetragonolobus) was investigated by quantitative precipitin analysis using blood group A, B, H, Le and I substances and by precipitation inhibition with various mono- and oligosaccharides. The lectin precipitated best with A1 substances and moderately with B and A2 substances, but not with H or Le substances. Inhibition assays of lectin-blood group A1 precipitation demonstration that A substance-derived oligosaccharides having the common structure: D-GalNAc alpha(1----3)D-Gal-(beta 1----3/4) to a D-Glc, were the best inhibitors and about 8 and 4 times more active than D-GalNAc and D-GalNAc alpha(1----3)D-Gal, respectively. A difucosyl A-specific oligosaccharide (A-penta), a monofucosyl (A-tetra) and a non-fucosyl containing (A5II) oligosaccharide, D-GalNAc alpha(1----3)D-Gal beta(1----3)D-GlcNAc, had almost the same reactivity, suggesting that the fucose linked to the sub-terminal D-Gal or to the third sugar. D-GlcNAc, from the non-reducing end made no contribution to the carbohydrate binding. Although a terminal non-reducing D-GalNAc or D-Gal residue was indispensible for binding, the lectin bound not only to these terminal non-reducing galactopyranosyl residues, but also showed increased binding to oligosaccharides in which it was bonded to a sub-terminal D-Gal joined to a D-GlcNAc residue, as in blood group A or B substances. This defines the site, thus far, as complementary to a disaccharide plus the beta linkage to the third sugar (D-Glc or D-GlcNAc) from the non-reducing end. The role of the beta(1----3) or beta(1----4) linkage of the sub-terminal non-reducing D-Gal to the D-GlcNAc requires further study.

Binding Sites↗

Cloning and bacterial expression of a sesquiterpene cyclase from Hyoscyamus muticus and its molecular comparison to related terpene cyclases.

Genomic and cDNA clones for vetispiradiene synthase, a sesquiterpene cyclase found in Hyoscyamus muticus, were isolated using a combination of reverse transcription-polymerase chain reactions and conventional cloning procedures. RNA blot hybridization demonstrated an induction of mRNA consistent with the induction of cyclase enzyme activity in elicitor-treated cells, DNA blot hybridization indicated a gene family of 6 to 8 members, and bacterial expression of 3 cDNA clones indicated that each coded for a vetispiradiene synthase enzyme activity catalyzing the synthesis of a single reaction product. Intron-exon organization of the vetispiradiene synthase gene was identical with that previously described for 5-epi-aristolochene synthase (tobacco sesquiterpene cyclase) and casbene synthase (castor bean diterpene cyclase), and the vetispiradiene synthase amino acid sequence was 77% identical with and 81% similar to the tobacco sesquiterpene cyclase. Regions of the vetispiradiene synthase sequence centered around amino acids 60, 100, and 370 were conspicuously different relative to the tobacco sesquiterpene cyclase. The sequence similarity between the tobacco and H. muticus enzymes is suggested to be reflective of the conservation of several partial reactions common to both enzymes, and the differences may be reflective of a partial reaction unique to each enzyme.

Alkyl and Aryl Transferases↗