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Biomedical subjects

G M Halpern

Publications and source records attributed to G M Halpern.

70 records · Page 4Linked to original sources

Evaluation of serum total IgE in Chinese allergic children using different assays.

Since differences in HLA groups have been found in Chinese populations, as well as differences in the values of total IgE in China, Japan and Thailand, a study has been done in 44 Chinese children, all of them with a history of atopic conditions divided into five groups: asthma, rhinitis, conjunctivitis, allergic bronchitis and atopic dermatitis. 34 of them were positive against D. pteronyssimus, 8 against cats, 3 against dogs and 3 against fish. The only adult patient studied was positive against gramineal plants (all positivities were tested with the prick test). IVT ELISA Screen is performed against 10 allergens, as well as 3 M FAST-Test and 3 M Total IgE FAST Plus Test. The results show that the majority of children had an elevation of the total IgE in the three tests. There is quite a good agreement between FAST and IgE-IVT and a better correlation between IgE-IVT and IgE FAST Plus. The correlation between IgE FAST and IgE FAST Plus was excellent.

Adult↗

Comparative uptake of calcium from milk and a calcium-rich mineral water in lactose intolerant adults: implications for treatment of osteoporosis.

Despite the links between low calcium (Ca) intake and age-related bone loss, hypertension, and colon cancer, the majority of Western populations have average daily Ca intakes substantially below recommended daily allowances. Although dietary products are widely known as a rich and valuable source of Ca in the diet, consumption of diary products is low and has been decreasing because of perceptions of excess calories and fat in the diet, as well as taste aversions. During the last decade, a marked increase in the consumption of bottled waters has occurred. Since some of these waters are characterized by high concentrations of Ca, we have studied Ca bioavailability from a Ca-rich water, using 15 lactose intolerant male individuals as subjects, and compared such bioavailability to that from milk. We report herein that the bioavailability of Ca from the water was generally as good as or better than that from milk, a food product well known for its very high Ca bioavailability. Indeed, in eight of 15 subjects, there was a higher level of Ca absorption from mineral water than from milk; bioavailability was equal in five of 15 subjects; in contrast, in two of 15 subjects, the bioavailability of Ca absorption from milk was greater than that from the mineral water. The potential implications of this observation for the prevention and management of age-related bone loss are important for preventive medicine and indicate a new, important source of dietary Ca for lactose intolerant individuals.

Adult↗

Diagnosis of inhalant allergy in a chimpanzee using "in vivo" and "in vitro" tests.

A 25 year old, 70 kg female chimpanzee had a 12 year history of intermittent signs of upper respiratory tract allergic disease. In June 1987, she was given Terfenadinea, 60 mg b.i.d., with excellent resolution of symptoms. During her annual physical examination, while maintained under ketamine anesthesia, the chimp was skin tested intradermally for respiratory allergies prevalent in the Sacramento area, and blood was drawn for "in vitro" evaluation. Strong positive skin reactions were obtained against grass, weed and tree antigens mixes, with little reaction to mold and mite allergens. Pollen specific IgG4 levels, as measured by fluorescence allergosorbent test (FAST)b, were elevated, and these data are discussed. The serum IgE results corresponded closely with traditional intradermal skin tests, suggesting the application of the human test (FAST)b to the chimpanzee, and potentially other nonhuman primates. The specificity, convenience, absence of risk of serum testing make it an attractive alternative to intradermal skin tests in nonhuman primates.

Animals↗

Odor-associated idiopathic anaphylaxis. A case report.

A 44 year old woman is described who appears to have idiopathic anaphylaxis triggered by chemical odors. Her case and a general discussion of anaphylaxis are presented. The known causes of anaphylaxis and a discourse on idiopathic anaphylaxis are given. The treatment of idiopathic anaphylaxis is discussed.

Adult↗

Uses, adverse effects of abuse of corticosteroids. Part I.

While no one seems to doubt the importance of corticosteroids as potent anti-inflammatory and immunomodular agents, view about the dreaded complications are also rampant. There appears to be a wide variation in their use among various physicians depending on their individual beliefs, but generally there is a consensus in regard to their use in certain autoimmune/connective tissue disorders such as SLE, various vasculitides, etc., where no acceptable alternative medications exist. In these conditions relatively high doses of corticosteroids are needed until the disease activity is controlled and thereafter attempts should be made to taper down the dose to the lowest possible maintenance dose. In some situations such an attempt may not be successful because of exacerbation in disease activity. In such cases supplemental steroid sparing agents such as azathioprine and others should be considered. Other measures such as alternate day therapy should be considered if shown to be affective in controlling disease activity. Alternate day therapy has been shown to be associated with fewer side effects, notably HPA axis suppression, incidence of infection, myopathy and glucose intolerance. Pulsed i.v. Solumedrol has also been shown to be effective in certain situations such as rapidly progressive glomerulonephritis and renal transplant rejection. Steroids should not be used when an equally effective alternative medication is available such as NSAIDS and disease modifying agents in various inflammatory arthritis. Much of reported side effects in the literature are based on case reports and uncontrolled studies and there appears to be considerable individual variation in susceptibility. Some of the side effects are expected regardless of the size of the dose and cumulative dose whereas others are related to the dose. Certain side effects of steroids use, notably osteoporosis, have been shown to be significantly associated with long term use of corticosteroids whereas in others such as peptic ulcer disease, the association is tenuous with other variables playing a significant role. Potential for abuse/misuse also exists both by the physicians and patients. This, however, is relatively small here in the U.S. compared to developing countries where corticosteroids have been used irrationally and inappropriately in a wide variety of conditions, in high dosages.

Capillary Permeability↗

Cefadroxil reduces the production of IgE in a 3 year old asthmatic with juvenile rheumatoid arthritis.

Cefadroxil, a cephalosporin, had been prescribed to children with superinfected atopic dermatitis, and was shown to improve both the infection, the clinical status and induced a dramatic lowering of the serum total IgE levels. Further studies have confirmed the IgE immunomodulating properties of cefadroxil. We report the case of a 3 year old asthmatic child who was hospitalized for superimposed pneumonia and was included in a study evaluating cefadroxil. The child was also suffering of juvenile rheumatoid arthritis. After treatment with cefadroxil and oral salbutamol, the child fully recovered. The initially elevated serum IgE (day 1:556 IU/ml) dropped to normal values (day 21: 52 IU/ml), while the production of IgE in vitro by peripheral blood B cells was normalized. We suggest that one mechanism of action of cefadroxil is the stimulation of production of gamma interferon in patients with atopic disorders; this mechanism interferes with the IL-4 primary signal, as well as with other second signals recognized for the synthesis of IgE. Gamma interferon may also prove beneficial for the control of juvenile rheumatoid arthritis.

Albuterol↗

Pharmacological regulation of the immune system.

Immunomodulators include any agent or substance that has an effect on the host immune system. These effects may be stimulatory, suppressive or regulatory. Many drugs, chemicals and microbial products have been identified as having specific as well as nonimmunostimulating properties. The first agent to be used clinically as an immunostimulating drug was Bacillus Calmette-Guerin (BCG). Subsequently, other bacterial derivatives, including Corynebacterium parvum and bacterial lipopolysaccharides, were found to have stimulatory effects. Most research in immunostimulating agents has been done in cancer chemotherapy, where such compounds or preparations have been employed to (hopefully) restore chemotherapeutic agent-induced immunosuppression, and thus prevent the development of community-acquired or nosocomial infections. In contrast to immunostimulants, immunoregulators are traditionally defined as being capable of decreasing an abnormally elevated immune response, and therefore restore defective immune function. However, the differentiation between immunoregulators and immunostimulants is not always clearly defined, as the regulatory effects on the immune system of any particular drug may be multifaceted. Clearly, future research must be directed at defining the specific mechanisms of action of potential therapeutic drugs, and in developing improved molecules to ensure safety and efficacy in the clinical setting.

Adjuvants, Immunologic↗

Unconventional approaches to drug therapy in severe asthma.

Asthma is now considered as an inflammatory disease. A subset of severe asthmatic patients requires large doses of daily systemic steroids to achieve some control of the inflammation of the airways. To minimize the daily absorption of glucocorticoids, a number of medicaments have been studied for the last three decades. Methotrexate, dapsone, hydroxychloroquine, ciclosporine A, gold salts, intravenous gammaglobulins, ketotifen, triacetyloleandomycin, all demonstrated some positive effects in a small number of studies. However, our impression is that most "steroid-sparing" medications are either poorly effective in large series and/or have intolerable side effects in these chronically ill patients; many are very expensive. A revised, adjusted therapeutic strategy, using currently recommended anti-asthmatic drugs, making a major use of inhaled topical corticosteroids, should limit the number of "cortico-dependent" asthmatic patients.

Antimalarials↗

Pseudoasthma in a case of asthma.

The respiratory system, which is composed of the upper and lower airways performs varied and distinct functions. These can also be the sites of various pathological processes. Asthma is one of the major conditions involving the lower airways whereas laryngeal dysfunction due to various conditions has also been known to occur. Isolated laryngeal dysfunction with abnormal vocal cord movements has been shown to occur both in various organic and non-organic conditions. The non-organic laryngeal dysfunction with a functional component is being increasingly recognized, the symptoms of which can be easily confused with those of asthma. We describe a patient who is believed to have both asthma and functional laryngeal dysfunction with paradoxical motion of the vocal cords on inspiration, observed on direct laryngoscopy. It is also believed that her laryngeal dysfunction is an isolated clinical entity not related to her underlying asthma, which has been shown, at times, to be associated with non-compensatory adduction of the vocal cords on inspiration. The patient described is known to have an anxious and hysterical personality and was also diagnosed to have a major depression. Episodes of paradoxical motion of the vocal cords on inspiration are acute and are usually precipitated by an emotional event and the shortness of breath may or may not be associated with stridor. Treatment of this condition, which can be mistaken for asthma, involves speech/vocal cord exercises to be used at the advent of an attack. It is thus important to recognize this condition so that appropriate treatment can be given.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

Anti-neutrophil cytoplasmic antibodies in patients with chromomycosis.

OBJECTIVE: Antineutrophil cytoplasmic antibodies (ANCA) are a family of antibodies that react to proteins within neutrophil granules and monocyte lysosomes, and occur prominently in sera from patients with systemic necrotizing vasculitis. The cytoplasmic staining pattern (c-ANCA) is very sensitive and specific for Wegener's granulomatosis (WG), and most commonly results from reactivity with proteinase 3 (PR3). The features of tissue damage in the fungal infection chromomycosis, in particular polymorphonuclear neutrophil (PMN) infiltration and granuloma formation, bear a resemblance to that seen in WG. METHODS: We tested sera from 25 patients with clinical and histologic diagnosis of chromomycosis for the presence of ANCA by indirect immunofluorescence. These same sera were analyzed for reactivity to neutrophil primary granule extracts and PR3 by ELISA. RESULTS: Five of the 25 patients (20%) had detectable c-ANCA, without central accentuation, at serum dilutions of at least 1:40. Three of these 5 ANCA-positive patients reacted with neutrophil primary granule extracts by ELISA; however, none of them reacted with PR3. CONCLUSIONS: These results demonstrate that fungal infection should be included among the conditions, unrelated to necrotizing vasculitis, that can trigger autoreactivity against myeloid lysosomal antigens.

Adult↗