MedGenMed : Medscape general medicine最新文献

Background: On July 19, 2006, the US Food and Drug Administration (FDA) issued an alert, "Potentially Life-Threatening Serotonin Syndrome With Combined Use of SSRIs or SNRIs and Triptan Medications." However, the cases that were the basis for the alert were not made available. The FDA recommends that patients treated concomitantly with a triptan and a selective serotonin reuptake inhibitor (SSRI)/selective norepinephrine reuptake inhibitor (SNRI) be informed of the possibility of serotonin syndrome.

Methods: Following a Freedom of Information Act request, the FDA provided the 29 cases that they evaluated as the basis for the alert. I summarize the cases, rate the quality of the cases on the basis of the information provided, and then determine whether the cases fulfill the Sternbach and Hunter criteria for serotonin syndrome.

Results: Seven cases met the Sternbach criteria but did not meet the Hunter criteria. No cases met both criteria or just the Hunter criteria.

Conclusions: Triptans when administered with SSRIs or SNRIs might rarely precipitate serotonin syndrome. The data do not support prohibiting the use of triptans with SSRIs or SNRIs. With increased physician awareness of serotonin syndrome, it is possible that additional cases may be reported.

Unlabelled: Cyclooxygenase-2 (COX-2) and transforming growth factor-beta1 (TGF-beta1) were modulated in a variety of viral infections, but there is a paucity of data about their role in the pathologic process of cirrhosis and/or hepatocellular carcinoma (HCC) following chronic hepatitis C virus (HCV) infection. The material of the current study included 50 cases of chronic hepatitis C (CHC) without cirrhosis, 30 cases of CHC with cirrhosis, and 30 cases of HCC with HCV admitted to the Gastroenterology and Hepatology Department of Theodor Bilharz Research Institute, Giza, Egypt. Fifteen wedge liver biopsies, taken during laparoscopic cholecystectomy, were included in the study as normal controls. Laboratory investigations, serologic markers for viral hepatitis, and serum alpha fetoprotein levels (alpha-FP) were done for all cases of the study. Immunohistochemistry using primary antibodies against both factors revealed weak to faint immunoreactivity to COX-2 and TGF-beta1 in normal hepatic tissue (< 30% and < 50% of the cells, respectively). COX-2 expression was upregulated in patients with CHC with and without cirrhosis, yet 80% of positively stained cirrhotic cases showed marked staining intensity. Higher COX-2 expression was observed in well-differentiated HCC cases (80%) with marked staining intensity (75%) compared with advanced HCC tumors (P < .001). TGF-beta1 was expressed in the hepatocytes of all cases of CHC with and without cirrhosis as well as in 67% of HCC cases. Extensive cytoplasmic expression was detected in 52%, 93.3%, and 46.6% of CHC patients without cirrhosis, patients with cirrhosis, and patients with HCC, respectively. A positive correlation was observed between hepatic expression of COX-2 and TGF-beta1 (r = 0.67, P < .05); however, no correlation was detected between the latter and grade of HCC differentiation (r = 0.33, P > .05).

Conclusion: These findings may suggest that TGF-beta1 plays a role in hepatic cell damage following HCV infection thus stressing the usefulness of this cytokine as a prognostic marker for liver cell injury. However, COX-2 is a predictive marker for malignant transformation and has a role in the early stages of hepatocarcinogenesis, but not in the advanced stages. The combined expression of both factors in HCV-related HCC suggests their synergistic action in the pathophysiology of hepatocarcinogenesis.

Background: Asthma is one of the most common inflammatory lung diseases and its prevalence and incidence have increased in many developed and developing countries. Asthma places a heavy burden on healthcare expenditures and productivity, which in turn diminishes the quality of life of the individuals involved as well as their families. The goal of improving a patient's knowledge about asthma management should include the enhancement of the individual's skills with the hopeful outcome of improving how the individual manages the condition. However, when health professionals prepare a training program, they are faced with the challenging cosmopolitan reality of individuals with different ethnic backgrounds.

Methods: In order to find links between asthma and health literacy in a cultural/ethnicity perspective, we performed a systematic review of all publications on the topic of asthma, health, and literacy among cultural groups from 1980 to 2006 using the Internet and journals: Medline (Ovid), ERIC, EMBASE, PsycINFO, Google, Google Scholar, Sociological Abstracts, and Anthropology Plus. Key words included the following: "asthma," "culture," "ethnicity," "literacy," "health," "health literacy," "health beliefs," "adults," "disease management," "chronic condition," "ethnocultural groups," "minority groups," and "newcomers/immigrants."

Results: More than 650 articles were initially identified in our review; 65 met our inclusion criteria. From these, we examined the factors related to asthma and literacy/health literacy with a cultural lens. All of these are categorized and summarized below. We chose what we considered to be the most relevant and important articles/documents in the research literature to date. Because many of the studies were qualitative, a formal meta-analytic review was not undertaken. We found that current asthma management techniques - including patient education - are not culturally sensitive, linguistically sensitive, or relevant, which creates further difficulties for ethnocultural communities and minority groups in many Western countries. In this systematic review, several themes were identified, including: approaches to language limitation and cultural barriers; the recognition of healthcare system bias (in terms of culturally competent care); and relationship-building to facilitate participatory decision-making by both provider and patient. This review provides further understanding and considerations regarding the beliefs and perspectives of care providers and populations in relation to health and illness, literacy and health literacy, and their association with asthma among ethnocultural communities.

Conclusions: There is an urgent need to better define the impact of cultural and ethnic issues in the management of asthma in Canada. Appropriately designed studies should better define the barriers in the optimal delivery of asthma care infl

Context: Allergy symptoms that affect the eyes are common in adults and children worldwide, and are often associated with nasal allergy symptoms, prompting the term 'rhinoconjunctivitis' to describe the condition. However, this condition has not always been recognized, and earlier literature reported allergic conjunctivitis only within a subset of nasal allergy patients.

Evidence acquisition: To assess the current state of ocular allergy epidemiology, pathophysiology, and currently available treatment options, we performed a MEDLINE search for articles regarding ocular allergy, rhinoconjunctivitis, vernal keratoconjunctivitis (VKC), atopic keratoconjunctivitis (AKC), and giant papillary conjunctivitis (GPC).

Evidence synthesis: The more severe forms of ocular allergy are not only distressing, but can also threaten a patient's vision. Each type of ocular allergy is associated with ocular redness, itching, and tearing; however, AKC and VKC can threaten the cornea, and research has revealed that involvement of different immune cell populations (mast cells, eosinophils, and lymphocytes) may cause these more severe symptoms. A variety of treatment options exist to control ocular allergy symptoms. Nonpharmacologic options include allergen avoidance and lubrication with saline, and if these fail to be sufficiently effective, symptom relief may be provided by medicinal agents that are either applied topically to the eye or taken orally. Recent evidence suggests that nasal allergy treatments applied topically to the nose may also positively affect ocular allergy symptoms, which raises the interesting possibility that a parasympathetic nasal-ocular neural reflex pathway may be involved in the stimulation of allergic responses in the eye.

Conclusions: Ocular allergy is underdiagnosed and has a significant impact on the life of the patient. It is vital to reach a better understanding of ocular allergic mechanisms and inflammation, which may lead to improved treatment.