Aggregation represents a significant challenge for the long-term formulation stability of insulin *** supramolecular pEGylation of insulin with conjugates of cucurbit[7]uril and polyethylene glycol(CB[7]-pEG)has been ...
详细信息
Aggregation represents a significant challenge for the long-term formulation stability of insulin *** supramolecular pEGylation of insulin with conjugates of cucurbit[7]uril and polyethylene glycol(CB[7]-pEG)has been shown to stabilize insulin formulations by reducing aggregation *** prolonged in vivo duration of action,arising from sustained complex formation in the subcutaneous depot,limits the application scope for meal-time insulin uses and could increase hypoglycemic risk several hours after a *** affinity of CB[7]in binding the B1-phe residue on insulin is central to supramolecular pEGylation using this ***,here we synthesized n-terminal acid-modified insulin analogs to reduce CB[7]interaction affinity at physiological pH and reduce the duration of action by decreasing the subcutaneous depot effect of the *** insulin analogs show weak to no interaction with CB[7]-pEG at physiological pH but demonstrate high formulation stability at reduced ***,n-terminal modified analogs have in vitro and in vivo bioactivity comparable to native ***,in a rat model of diabetes,the acid-modified insulin formulated with CB[7]-pEG offers a reduced duration of action compared to native insulin formulated with CB[7]-*** work extends the application of supramolecular pEGylation of insulin to achieve enhanced stability while reducing the risks arising from a subcutaneous depot effect prolonging in vivo duration of action.
AIM: To show a new paradigm of simultaneously testing whether breast cancer therapies impact other causes of death. METHODS: MA.14 allocated 667 postmenopausal women to 5 years of tamoxifen 20 mg/daily ± 2 years of o...
详细信息
AIM: To show a new paradigm of simultaneously testing whether breast cancer therapies impact other causes of death. METHODS: MA.14 allocated 667 postmenopausal women to 5 years of tamoxifen 20 mg/daily ± 2 years of octreotide 90 mg, given by depot intramuscular injections monthly. Event-free survival was the primary endpoint of MA.14; at median 7.9 years, the tamoxifen+octreotide and tamoxifen arms had similar event-free survival(p = 0.62). Overall survival was a secondary endpoint, and the two trial arms also had similar overall survival(p = 0.86). We used the median 9.8 years follow-up to examine by intention-to-treat, the multivariate time-to-breast cancer-specific(Br Ca) and other cause(OC) mortality with log-normal survival analysis adjusted by treatment and stratification factors. We tested whether baseline factors including Insulin-like growth factor 1(IGF1), IGF binding protein-3, C-peptide, body mass index, and 25-OH vitamin D were associated with(1) all cause mortality, and if so; and(2) cause-specific mortality. We also fit step-wise forward cause-specific adjusted ***: The analyses were performed on 329 patients allocated tamoxifen and 329 allocated tamoxifen+octreotide. The median age of MA.14 patients was 60.1 years: 447(82%) nd 120(18%) ≥ 70 years. There were 170 deaths: 106(62.3%) BrC a; 55(32.4%) OC, of which 24 were other malignancies, 31 other causes of death; 9(5.3%) patients with unknown cause of death were excluded from competing risk assessments. BrC a and OC deaths were not significantly different by treatment arm(p = 0.40): tamoxifen patients experienced 50 BrC a and 32 OC deaths, while tamoxifen + octreotide patients experienced 56 Br Ca and 23 OC deaths. proportionately more deaths(p = 0.004) were from BrC a for patientspared to 54% for those ≥ 70 years of age. The proportion of deaths from OC increased with increasing body mass index(BMI)(p = 0.02). Higher pathol
暂无评论