利用Pirkle型手性固定相柱拆分对映体药物:用异氰酸-α萘酯衍生化拆分烯丙洛尔等β-阻断剂药物及衍生物的结构鉴定

利用异氰酸-α萘酯(NI)作衍生化试剂,在Pirkle型DNBPG柱上拆分了β-阻断(?)丙洛尔等药物。方法简便,分离度好。对其衍生物结构的研究表明:在温和的条件下,异氰酸酯与分析物的仲氨基反应,生成脲;若反应在较强烈的条件下进行,则将发生异构化,最终是异氰酸酯与羟基结合,生成氨基甲酸酯。实验还表明,NI试剂与分析物之间的反应是按1:1进行的。     

Pelvic pain and infections

Infectious etiologies of both acute and chronic pelvic pain are common and may involve multiple organ systems. In the evaluation of the acute pain, it is important to remember that rapidity of diagnosis is important because of the possibility of significant morbidity and even death if a condition is not attended to rapidly. In recent years, laparoscopic evaluation of the pelvis has provided a better understanding of the pathophysiology of some of these infections, as well as possible therapeutic maneuvers. The evaluation of chronic pelvic pain requires a thorough attempt at careful diagnosis with minds open to the possibility that other organ systems besides the genital tract may be involved. Laparoscopy also may be an important diagnostic and therapeutic tool in the evaluation of the sequelae of pelvic inflammation leading to chronic pelvic pain. All therapeutic modalities that are instituted on the basis of the diagnostic evaluation must take into consideration that a strong emotional component is generally associated with chronic pelvic pain. Such components must be addressed in order to achieve the best possible results for the patient.     

Effects of antigen and internal environment on anti-phosphorylcholine immune responses of autoimmune aged NZB/W F1 mice.

The idiotypic profile of anti-phosphorylcholine plaque-forming cell responses and their evolution with ageing were studied in (NZB X NZW) F1 mice. Our results showed that the anti-phosphorylcholine plaque-forming cell response induced by phosphorylcholine coupled to keyhole limpet haemocyanin and, paralleling, the T15 idiotype clonal dominance declined with ageing. This loss of immune competence was also observed with another thymus-dependent (phosphorylcholine coupled to egg globulin) as well as thymus-independent (capsular polysaccharide of Streptococcus pneumoniae strain R36a) antigens. In contrast, old mice challenged with an antigenic preparation of Neisseria meningitidis showed an immune response not significantly different from that elicited by the same antigen in young mice. The hapten-augmentable plaque-forming cells were assayed to determine whether a putative auto-antiidiotypic regulation underlies this loss of immune competence. Only minimal numbers and non-significant differences between young and old mice immunized with any antigen could be detected. Further studies using an adoptive transfer system demonstrated that cells from aged mice were able to support a normal anti-phosphorylcholine response when transferred into lethally irradiated young recipients. Our results suggest that no permanent cellular defects, but rather internal environment or/and radioresistant suppressor cells, are involved in this loss of immune competence. The role played by these factors and their effect on distinct subpopulations of B cells are discussed.     

Clinical characteristics of SARS-CoV-2 infection in children with cystic fibrosis: An international observational study

BackgroundThe presence of co-morbidities, including underlying respiratory problems, has been identified as a risk factor for severe COVID-19 disease. Information on the clinical course of SARS-CoV-2 infection in children with cystic fibrosis (CF) is limited, yet vital to provide accurate advice for children with CF, their families, caregivers and clinical teams.MethodsCases of SARS-CoV-2 infection in children with CF aged less than 18 years were collated by the CF Registry Global Harmonization Group across 13 countries between 1 February and 7 August 2020.ResultsData on 105 children were collated and analysed. Median age of cases was ten years (interquartile range 6–15), 54% were male and median percentage predicted forced expiratory volume in one second was 94% (interquartile range 79–104). The majority (71%) of children were managed in the community during their COVID-19 illness. Out of 24 children admitted to hospital, six required supplementary oxygen and two non-invasive ventilation. Around half were prescribed antibiotics, five children received antiviral treatments, four azithromycin and one additional corticosteroids. Children that were hospitalised had lower lung function and reduced body mass index Z-scores. One child died six weeks after testing positive for SARS-CoV-2 following a deterioration that was not attributed to COVID-19 disease.ConclusionsSARS-CoV-2 infection in children with CF is usually associated with a mild illness in those who do not have pre-existing severe lung disease.     

A review of famciclovir in the management of genital herpes.

The frequent occurrence of genital herpes continues to be a serious clinical problem. Although not life threatening, the physical symptoms of the disease, and the ensuing psychosocial complications, can be overwhelming to patients. The life cycle of the herpes simplex virus is complex, comprising multiple stages. Following infection, the virus establishes life-long latency in its host and can reactivate at any time as a recurrent infection. Successful management of genital herpes simplex infections involves patient education and psychological support, as well as antiviral agents. The antiviral agent famciclovir has been shown to shorten the course and decrease the severity of episodes of recurrent genital herpes. In addition, famciclovir has been shown to be effective in suppressing recurrent genital herpes. A review of the clinical experience with famciclovir in the treatment of genital herpes is presented.     

Isolation of Kingella denitrificans from amniotic fluid in a woman with chorioamnionitis. A case report.

Kingella denitrificans and Streptococcus agalactiae were isolated from the amniotic fluid of a woman with chorioamnionitis. She was treated with intravenous ampicillin/sulbactam, with a good response.     

Cancer associated haemolytic uraemic syndrome developing prior to treatment with cytotoxic agents

The haemolytic uraemic syndrome has been reported in children and adults with neoplasias treated with mitomycin C and occasionally in adults prior to chemotherapeutic treatment, but it has not been reported in a child prior to the use of cytotoxic drugs. This case report concerns the development of the haemolytic uraemic syndrome in a 7-year-old male child with a metastatic hepatocellular carcinoma. The child had persisting haemolysis and renal imparment, and died three weeks after presentation. Though our exprerience with similar tumours suggested the outlook would be poor, we had hoped to provide palliative chemotherapy. This proved impossible as optimal chemotherapy could not be used because of the renal impairment.