The esterifications of 9-（hydroxyimino）-4-methyl-8,9-dihydrofuro[2,3-h]chromen-2-one （4） with acid chlorides afforded normal oxime-esters 3a-e in 35-78% yields in presence of excessive 4-dimethylaminopyridine as t...The esterifications of 9-（hydroxyimino）-4-methyl-8,9-dihydrofuro[2,3-h]chromen-2-one （4） with acid chlorides afforded normal oxime-esters 3a-e in 35-78% yields in presence of excessive 4-dimethylaminopyridine as the acid scavenger, whereas the reactions gave unexpected 8-substituted products N-（8-chloro-4-methyl-2-oxo-2H-furo-[2,3-h]chromen-9-yl）amides （5a-c） and 4-methyl-2,9-dioxo-8,9-dihydro-2H-furo[2,3-h]chromen-8-ylcarboxyloates （6d-e） by using excessive acid chlorides. The structures of 10 new compounds were determined by 1H NMR, 13C NMR, MS and HRMS, and the possible mechanism for the formation of unexpected products 5a--c and 6d-e was also proposed.展开更多
Objective: To investigate the correlation between lower extremity vascular sclerosis and osteoporosis in elderly men with type 2 diabetes mellitus. Methods: A total of 359 elderly male patients with type II diabetes h...Objective: To investigate the correlation between lower extremity vascular sclerosis and osteoporosis in elderly men with type 2 diabetes mellitus. Methods: A total of 359 elderly male patients with type II diabetes hospitalized in the First Affiliated Hospital of Chongqing Medical University from January 2018 to June 2023 were retrospectively collected. According to the BMD (Bone Density Value), the patients were categorized into osteoporotic (T ≤ -2.5, n = 248) and non-osteoporotic groups (T > -2.5, n = 111). T test and Chi-square test were used to evaluate the differences in clinical data, biochemical markers and ABI between two groups. Multivariate logistic regression was used to analyze the risk factors of osteoporosis in elderly men with type 2 diabetes mellitus. Results: Compared with the non-osteoporotic group, the differences in diabetes course, systolic blood pressure, ABI, BMI, uric acid, triglyceride, and HDL in the osteoporotic group were statistically significant (P < 0.05). Logistic multivariate regression analysis showed that lower extremity vascular sclerosis was an independent risk factor for osteoporosis in elderly men with type 2 diabetes mellitus (P Conclusion: Atherosclerosis of the lower extremities in elderly men with T2DM is closely related to osteoporosis, and can lead to a decrease in bone mass, and an increase in osteoporosis.展开更多
Multiple endocrine neoplasia type 2A （MEN2A）, a subtype of MEN2, is characterized by medullary thyroid cancer, pheochromocytoma, and primary hyperparathyroidism. A Han Chinese pedigree with MEN2A was investigated fo...Multiple endocrine neoplasia type 2A （MEN2A）, a subtype of MEN2, is characterized by medullary thyroid cancer, pheochromocytoma, and primary hyperparathyroidism. A Han Chinese pedigree with MEN2A was investigated following confirmation of the proband＇s diagnosis by pathological findings and DNA/biochemical screening. DNA samples from 4 other family members were collected and exon 5, 8, 10, 11, 13, 16 and 18 of the RET proto-oncogene were sequenced and then analyzed. A missense mutation of TGG （Trp） to TGC （Cys） at codon 634 （the classic MEN2A mutation） in exon 11 of the RET gene was detected in 3 family members, including the proband. Sequencing data were compared with the human gene mutation database. Elevated serum calcitonin level was detected initially; medullary thyroid carcinoma was revealed in the 3 cases and adrenal pheochromocytoma was also found in the proband. Elective operations were successfully performed on the adrenal and thyroid glands because of pheochromocytoma and medullary thyroid carcinoma. Our case study confirms that integrated DNA-based/biochemical screening is crucial for early diagnosis of MEN2A and is helpful in the screening of their relatives. In addition, DNA-based screening may occasionally uncover a previously unknown RET sequence.展开更多
目的:了解江苏省男男性行为人群(men who have sex with men,MSM)中人类免疫缺陷病毒(human immunoddficiency virus,HIV)感染者的梅毒及单纯疱疹病毒Ⅱ型(herpes simplex virus 2,HSV-2)的感染情况及影响因素。方法:2012年3～6月在南...目的:了解江苏省男男性行为人群(men who have sex with men,MSM)中人类免疫缺陷病毒(human immunoddficiency virus,HIV)感染者的梅毒及单纯疱疹病毒Ⅱ型(herpes simplex virus 2,HSV-2)的感染情况及影响因素。方法:2012年3～6月在南京、镇江市整群抽取HIV阳性的MSM 264例,对其进行随访问卷调查,并回顾其病例报告时的问卷信息。静脉血采集进行梅毒和HSV-2检测。结果:264例MSM中梅毒感染率为29.55%(78/264),其中现症梅毒感染率为13.64%(36/264),HSV-2型特异性IgG抗体阳性率为28.03%(74/264)。多因素Logistic回归分析结果显示与现症梅毒感染有统计学意义的因素为感染前6个月内同性性伴数>3人、HSV-2阳性;与HSV-2感染有统计学意义的因素为年龄>35岁、本县区户籍、现症梅毒感染和接受安全套发放服务。结论:应探索新的干预模式和检测策略,以应对梅毒和HSV-2在MSM人群中的传播和流行。展开更多
基金grants from the National Natural Science Foundation of China (No.20272010 and 20672022)
文摘The esterifications of 9-（hydroxyimino）-4-methyl-8,9-dihydrofuro[2,3-h]chromen-2-one （4） with acid chlorides afforded normal oxime-esters 3a-e in 35-78% yields in presence of excessive 4-dimethylaminopyridine as the acid scavenger, whereas the reactions gave unexpected 8-substituted products N-（8-chloro-4-methyl-2-oxo-2H-furo-[2,3-h]chromen-9-yl）amides （5a-c） and 4-methyl-2,9-dioxo-8,9-dihydro-2H-furo[2,3-h]chromen-8-ylcarboxyloates （6d-e） by using excessive acid chlorides. The structures of 10 new compounds were determined by 1H NMR, 13C NMR, MS and HRMS, and the possible mechanism for the formation of unexpected products 5a--c and 6d-e was also proposed.
文摘Objective: To investigate the correlation between lower extremity vascular sclerosis and osteoporosis in elderly men with type 2 diabetes mellitus. Methods: A total of 359 elderly male patients with type II diabetes hospitalized in the First Affiliated Hospital of Chongqing Medical University from January 2018 to June 2023 were retrospectively collected. According to the BMD (Bone Density Value), the patients were categorized into osteoporotic (T ≤ -2.5, n = 248) and non-osteoporotic groups (T > -2.5, n = 111). T test and Chi-square test were used to evaluate the differences in clinical data, biochemical markers and ABI between two groups. Multivariate logistic regression was used to analyze the risk factors of osteoporosis in elderly men with type 2 diabetes mellitus. Results: Compared with the non-osteoporotic group, the differences in diabetes course, systolic blood pressure, ABI, BMI, uric acid, triglyceride, and HDL in the osteoporotic group were statistically significant (P < 0.05). Logistic multivariate regression analysis showed that lower extremity vascular sclerosis was an independent risk factor for osteoporosis in elderly men with type 2 diabetes mellitus (P Conclusion: Atherosclerosis of the lower extremities in elderly men with T2DM is closely related to osteoporosis, and can lead to a decrease in bone mass, and an increase in osteoporosis.
基金supported by grant 81170747 from the National Natural Sciences Foundation of Chinagrant H201106 from Health Promotion Foundation of Jiangsu Provincegrant from the Office of Human Resources and Social Security of Jiangsu Province (Peak of the Six Personnel in Jiangsu Province) to Hongwen Zhou
文摘Multiple endocrine neoplasia type 2A （MEN2A）, a subtype of MEN2, is characterized by medullary thyroid cancer, pheochromocytoma, and primary hyperparathyroidism. A Han Chinese pedigree with MEN2A was investigated following confirmation of the proband＇s diagnosis by pathological findings and DNA/biochemical screening. DNA samples from 4 other family members were collected and exon 5, 8, 10, 11, 13, 16 and 18 of the RET proto-oncogene were sequenced and then analyzed. A missense mutation of TGG （Trp） to TGC （Cys） at codon 634 （the classic MEN2A mutation） in exon 11 of the RET gene was detected in 3 family members, including the proband. Sequencing data were compared with the human gene mutation database. Elevated serum calcitonin level was detected initially; medullary thyroid carcinoma was revealed in the 3 cases and adrenal pheochromocytoma was also found in the proband. Elective operations were successfully performed on the adrenal and thyroid glands because of pheochromocytoma and medullary thyroid carcinoma. Our case study confirms that integrated DNA-based/biochemical screening is crucial for early diagnosis of MEN2A and is helpful in the screening of their relatives. In addition, DNA-based screening may occasionally uncover a previously unknown RET sequence.
文摘目的:了解江苏省男男性行为人群(men who have sex with men,MSM)中人类免疫缺陷病毒(human immunoddficiency virus,HIV)感染者的梅毒及单纯疱疹病毒Ⅱ型(herpes simplex virus 2,HSV-2)的感染情况及影响因素。方法:2012年3～6月在南京、镇江市整群抽取HIV阳性的MSM 264例,对其进行随访问卷调查,并回顾其病例报告时的问卷信息。静脉血采集进行梅毒和HSV-2检测。结果:264例MSM中梅毒感染率为29.55%(78/264),其中现症梅毒感染率为13.64%(36/264),HSV-2型特异性IgG抗体阳性率为28.03%(74/264)。多因素Logistic回归分析结果显示与现症梅毒感染有统计学意义的因素为感染前6个月内同性性伴数>3人、HSV-2阳性;与HSV-2感染有统计学意义的因素为年龄>35岁、本县区户籍、现症梅毒感染和接受安全套发放服务。结论:应探索新的干预模式和检测策略,以应对梅毒和HSV-2在MSM人群中的传播和流行。
