Objective: To observe the effect and clinical significance of circulating endothelial cells (CEC) in the pathogenesis of coronary heart disease with unstable angina pectoris (CHD-UAP), and to explore the protective ef...Objective: To observe the effect and clinical significance of circulating endothelial cells (CEC) in the pathogenesis of coronary heart disease with unstable angina pectoris (CHD-UAP), and to explore the protective effect of Chinese herbs for activating blood circulation, removing stasis and supplementing Qi (CH) on CHD-UAP patient's CEC. Methods: Sixty patients with diagnosis of CHD-UAP confirmed and differentiated to be Qi-deficiency and blood stasis by TCM were randomly divided into two groups and treated, on the basis of Western drug-therapy, with Tongxinluo capsule (通心络胶囊, TXL) and Huoxue Tongmai capsule (活血通脉胶囊, HXTM) respectively by way of oral taking three times a day, 3 capsules every time, with 1 month as one therapeutic course. The number of CEC in patients' blood circulation was counted before and after treatment. Besides, the number of CEC in 30 healthy persons was also counted for control. Results: The number of CEC in CHD-UAP patients was significantly higher than that in the healthy persons (P<0.01). After the patients were treated with CH, either TXL or HXTM, it significantly decreased (P<0.01)with insignificant difference between the two treated groups. Conclusion: CEC in CHD-UAP patients is severely damaged and endothelial function in disorder, Chinese herbs have protective effect on patients' CEC.展开更多
Vertebrobasilar dolichoectasia(VBD),a rare posterior circulation vascular variant disease,is an important risk factor for many acute cerebrovascular diseases.An insufficient understanding of VBD often leads to misdiag...Vertebrobasilar dolichoectasia(VBD),a rare posterior circulation vascular variant disease,is an important risk factor for many acute cerebrovascular diseases.An insufficient understanding of VBD often leads to misdiagnose.Two cases of VBD that were initially diagnosed as posterior circulation watershed infarction are reported here.Absence of common causes of stroke including hypoperfusion,blood system diseases,carotid and aortic dissection,and eosinophil elevation,the symptoms of the 2 patients met the diagnostic criteria of VBD.Both patients displayed symptoms that were in line with the Traditional Chinese Medicine(TCM)syndrome pattern of"Qi deficiency and blood stasis".Accordingly,they were comprehensively treated with Supplementing Qi and activating blood circulation method.The clinical manifestations of the 2 patients were remarkably improved and no recurrence of watershed infarction was found in a 1-year follow-up.A detailed medical history and laboratory examination are capable of improving diagnostic accuracy of VBD.TCM treatment based on syndrome identification might be a promising candidate for VBD management.展开更多
Objective:To observe the heart function、MEE and serum FFA of Shenqiyixin prescription for heart qi(yang)deficiency with blood stasis and fluid retention type of chronic heart failure patients,to evaluate the clinical...Objective:To observe the heart function、MEE and serum FFA of Shenqiyixin prescription for heart qi(yang)deficiency with blood stasis and fluid retention type of chronic heart failure patients,to evaluate the clinical efficacy and safety.Methods:64 cases with chronic heart failure of heart qi(yang)deficiency with blood stasis and fluid retention were randomly divided into two groups,3 cases were excluded,31 cases in the control group and 30 cases in the treatment group.The control group was treated with western medicine,and the treatment group was treated with Shenqiyixin prescription additionally.The course of treatment was 3 weeks.Observe the changes of TCM syndrome score,6MWD,LVEF,cESS,MEE,serum NTproBNP,serum FFA and safety indexes of each group before and after treatment.Results:after treatment,the TCM Syndromes of each group were improved.The total effective rate of the treatment group was 93.33%,and the control group was 83.87%.The treatment group was more effective(P<0.05).After treatment,the TCM syndrome score,cESS,MEE,NTproBNP and FFA of each group were decreased,6MWD and LVEF were increased(P<0.05),and the treatment group was superior to the control group(P<0.05).Conclusion:Shenqiyixin prescription can improve the TCM syndrome and heart function in patients with chronic heart failure of heart qi(yang)deficiency with blood stasis and fluid retention,at the same time,it can reduce the level of MEE and serum FFA in patients with heart failure.展开更多
Objective:To observe the effects of Chinese drugs for supplementing qi,nourishing yin and activating blood circulation on the myocardial perfusion in acute myocardial infarction(AMI) patients after revascularization.M...Objective:To observe the effects of Chinese drugs for supplementing qi,nourishing yin and activating blood circulation on the myocardial perfusion in acute myocardial infarction(AMI) patients after revascularization.Methods:Eighty patients with anterior or inferior ventricular wall AMI,who had received revascularization by intravenous thrombolysis or coronary bypass,were randomized into the treated group and the control group equally,both treated with conventional Western medical treatment,but combined,resp...展开更多
Objective: To observe the effect of Chinese herbal medicine for nourishing yin, supplementing qi, and activating blood on the expression of interferen- γ (IFN-γ,)/interleukin-4 (IL-4) in peripheral blood and di...Objective: To observe the effect of Chinese herbal medicine for nourishing yin, supplementing qi, and activating blood on the expression of interferen- γ (IFN-γ,)/interleukin-4 (IL-4) in peripheral blood and disease activity in primary Sjogren's syndrome (pSS) patients, and to study the relationship between the immune balance of Th1/Th2 and the disease activity. Methods: A total of 66 pSS patients were randomized with tossing coins method into two groups: the integrative therapy group (34 cases) and the control group (32 cases); and 28 healthy subjects were taken as the normal group. The integrative therapy group was treated by Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood combined with hydroxychloroquine sulfate tablets and the control group was treated with hydroxychloroquine sulfate tablets. The treatment course was 3 months for both groups. The levels of serum immunoglobulin G (IgG), erythrocyte sedimentation rate (ESR), IFN-γand IL-4 in peripheral blood were measured before and after treatment. Results: Compared with the normal group, the levels of IgG, ESR, IFN- γ and IL-4 were significantly increased in pSS patients (P〈0.05). Remarkably, after 3 months of treatment, these levels were dramatically decreased in both the integrative therapy group and the control group, although still higher than the normal group. The levels of IgG, ESR, IFN- and IL-4 in the integrative therapy group were lower than the control group and the same group before treatment (P〈0.05). The ratio of IFN-γ/IL-4 also significantly decreased after treatment. Moreover, the level of IFN- γ, and the ratio of IFN- γ/IL-4 in the integrative theraphy group were significantly lower than the control group (P〈0.05). For all patients the ratio of IFN-γ/IL-4 before and after treatment was positive correlated with the levels of IgG and ESR. Conclusion: Chinese herbal medicine for nourishing yin, supplementing qi, and activating blood can alleviate the disease activity of pSS by regulating the immune balance of Th1/Th2.展开更多
ABSTRACT Objective: To investigate the effect of Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood on the reproductive endocrine-immune network and its mechanisms in patients with pr...ABSTRACT Objective: To investigate the effect of Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood on the reproductive endocrine-immune network and its mechanisms in patients with primary Sjogren's syndrome (pSS). Methods: Seventy pSS patients were randomly assigned to two groups using a randomized digital table: the integrative therapy group (36 cases) and the control group (34 cases). Thirty healthy subjects were taken as a normal group. The control group was treated with hydroxychloroquine sulfate tablets alone, and the integrative therapy group was treated by Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood combined with hydroxychloroquine sulfate tablets. The treatment course was 6 months for both groups. Before and after treatment, serum estradiol (E2), testosterone (T), luteinizing hormone (LH), prolactin (PRL) by radioimmunoassay and immunoglobulin (IgG) by immunodiffusion, erythrocyte sedimentation rate (ESR) by Westergren, interferon-γ (IFN-γ) and interleukin-4 (IL-4) by enzyme linked immunosorbent assay were determined. Results: E2 and T levels in all patients were lower than those of normal subjects before treatment (P〈0.05) and were increased significantly after 6-month treatment (P〈0.05). ESR, FSH, LH, IgG, IFN - γ, IL - 4 and ratios of E2/T, and IFN --γ/IL in the patients were higher than those of normal subjects before the treatments (P〈0.05), and were reduced significantly after the treatments (P〈0.05). The T and IFN -γ levels and E2/T ratio in the patients treated with integrative therapy were reduced significantly compared with the control group (P〈0.05). However, the PRL levels before and after treatment were not significantly changed in the two groups (P〉0.05). The ratios of E2/T and IFN -γ/IL-4, and levels of IgG and ESR were positively correlated before and after treatment (P〈0.05). Conclusions: The ratios of E2/T and IFN - γ/ IL-4 might be used as indicators of pSS activity. Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood combined with Western medicine could improve the therapeutic effect by regulating the reproductive endocrine-immune network in pSS patients.展开更多
Objective: To investigate the effects of Chinese herbs for supplementing qi, nourishing yin and activating blood circulation on heart function of patients with acute coronary syndrome (ACS) after successful percuta...Objective: To investigate the effects of Chinese herbs for supplementing qi, nourishing yin and activating blood circulation on heart function of patients with acute coronary syndrome (ACS) after successful percutaneous coronary intervention (PCI). Methods: One hundred patients with ACS after successful PCI were randomly assigned to a Western medicine (WM) treatment group (WMG) and a combined treatment group (CMG) treated by Chinese herbs for supplementing qi, nourishing yin and activating blood circulation, besides Western medicine treatment, with 50 cases in each group. Both treatment courses were 6 months. The follow- up was scheduled at baseline, 6 months and 1 year after PCI, and New York Heart Association (NYHA) functional class, Chinese medicine (CM) symptom scores, blood stasis syndrome scores, and major adverse cardiovascular events (MACE) were observed, serum levels of N-terminal pro-brain natriuretic peptide (NT-proBNP) and hyper-sensitivity C-reactive protein (Hs-CRP) were measured, an echocardiogram was conducted to examine left ventricular ejection fraction (LVEF), left ventricular end-diastolic volume (LVEDV), left ventricular end-systolic volume (LVESV), inter-ventricular septal thickness (IVST), left ventricular posterior wall thickness (LVPWT), and ventricular wall motion index (VWMI). Results: Compared with the baseline, LVEF significantly increased (P〈0.01), and CM symptom scores, blood stasis syndrome scores, VWMI, LVEDV, LVESV, NT-proBNP, and Hs-CRP all decreased (P〈0.01) in both groups at 6 months and at 1 year after PCI. There were no significant differences in all the above parameters at 1 year vs those at 6 months after PCI (P〉0.05). VWMI, LVEDV, LVESV, NT-proBNP, Hs-CRP, LVEF, and CM symptom and blood stasis syndrome scores were all improved obviously in CMG than those in WMG (P〈0.05 or P〈0.01) at 6 months and at 1 year after PCI. There were no significant differences in NYHA functional class between CMG and WMG at different follow-up timepoints; it was notable that P value was 0.054 when comparing the cases of NYHA functional class between the two groups at 1-year follow-up. During the 1-year follow-up, 3 MACE and 11 MACE occurred in CMG and WMG, respectively; the MACE rate in CMG was lower than that in WMG (6% vs 22%, P〈0.05). Conclusion: Chinese herbs for supplementing qi, nourishing yin and activating blood circulation could improve heart function, reduce the CM symptom scores and blood stasis syndrome scores, and decrease the incidence of MACE in patients with ACS after successful PCI.展开更多
Objective: To explore the therapeutic effect and the possible working mechanism in using Chinese herbal medicine (CHM) for supplementing Kidney and Qi, and activating blood circulation in treating intrauterine growth ...Objective: To explore the therapeutic effect and the possible working mechanism in using Chinese herbal medicine (CHM) for supplementing Kidney and Qi, and activating blood circulation in treating intrauterine growth retardation of fetus (IUGR). Methods: Fifty-five cases of IUGR were divided into two groups, 30 cases in the CHM group treated with CHM and the 25 in the control group treated with amino acids. The effect of CHM treatment was observed and compared with that of the control group, normal pregnancy group and non-treated IUGR group. Results: Body weight of the newborns in the CHM was markedly higher than that in the control group. Not only the maternal fundal height (FH) and the abdominal circumference (AC), but also the fetal growth parameters, including biparietal diameter, head circumference (HC), and femur length (FL) in the CHM group increased much faster than those in the control group. After CHM treatment, the maternal serum levels of estriol (E3) and human placental lactogen (hPL) approached to those in the normal pregnancy group, but the control group,in comparison with the normal pregnancy group, was significantly different. The umbilical venous plasma concentration of essential amino acids in both treated groups improved, but the improvement in the CHM group was more significant than that in the control group. No apparent adverse effect of CHM was observed in either mother or fetus.Conclusion: CHM for supplementing Kidney and Qi and activating blood circulation was more effective in improving placental function and enhancing amino acid transportation than amino acid展开更多
文摘Objective: To observe the effect and clinical significance of circulating endothelial cells (CEC) in the pathogenesis of coronary heart disease with unstable angina pectoris (CHD-UAP), and to explore the protective effect of Chinese herbs for activating blood circulation, removing stasis and supplementing Qi (CH) on CHD-UAP patient's CEC. Methods: Sixty patients with diagnosis of CHD-UAP confirmed and differentiated to be Qi-deficiency and blood stasis by TCM were randomly divided into two groups and treated, on the basis of Western drug-therapy, with Tongxinluo capsule (通心络胶囊, TXL) and Huoxue Tongmai capsule (活血通脉胶囊, HXTM) respectively by way of oral taking three times a day, 3 capsules every time, with 1 month as one therapeutic course. The number of CEC in patients' blood circulation was counted before and after treatment. Besides, the number of CEC in 30 healthy persons was also counted for control. Results: The number of CEC in CHD-UAP patients was significantly higher than that in the healthy persons (P<0.01). After the patients were treated with CH, either TXL or HXTM, it significantly decreased (P<0.01)with insignificant difference between the two treated groups. Conclusion: CEC in CHD-UAP patients is severely damaged and endothelial function in disorder, Chinese herbs have protective effect on patients' CEC.
基金the 2019 Major Difficult Diseases Clinical Collaboration Capacity Building Project of Traditional Chinese and Western Medicine-cerebral Infarction(No.YW082)。
文摘Vertebrobasilar dolichoectasia(VBD),a rare posterior circulation vascular variant disease,is an important risk factor for many acute cerebrovascular diseases.An insufficient understanding of VBD often leads to misdiagnose.Two cases of VBD that were initially diagnosed as posterior circulation watershed infarction are reported here.Absence of common causes of stroke including hypoperfusion,blood system diseases,carotid and aortic dissection,and eosinophil elevation,the symptoms of the 2 patients met the diagnostic criteria of VBD.Both patients displayed symptoms that were in line with the Traditional Chinese Medicine(TCM)syndrome pattern of"Qi deficiency and blood stasis".Accordingly,they were comprehensively treated with Supplementing Qi and activating blood circulation method.The clinical manifestations of the 2 patients were remarkably improved and no recurrence of watershed infarction was found in a 1-year follow-up.A detailed medical history and laboratory examination are capable of improving diagnostic accuracy of VBD.TCM treatment based on syndrome identification might be a promising candidate for VBD management.
基金Natural Science Foundation of Heilongjiang Province(No.LH2019H104).
文摘Objective:To observe the heart function、MEE and serum FFA of Shenqiyixin prescription for heart qi(yang)deficiency with blood stasis and fluid retention type of chronic heart failure patients,to evaluate the clinical efficacy and safety.Methods:64 cases with chronic heart failure of heart qi(yang)deficiency with blood stasis and fluid retention were randomly divided into two groups,3 cases were excluded,31 cases in the control group and 30 cases in the treatment group.The control group was treated with western medicine,and the treatment group was treated with Shenqiyixin prescription additionally.The course of treatment was 3 weeks.Observe the changes of TCM syndrome score,6MWD,LVEF,cESS,MEE,serum NTproBNP,serum FFA and safety indexes of each group before and after treatment.Results:after treatment,the TCM Syndromes of each group were improved.The total effective rate of the treatment group was 93.33%,and the control group was 83.87%.The treatment group was more effective(P<0.05).After treatment,the TCM syndrome score,cESS,MEE,NTproBNP and FFA of each group were decreased,6MWD and LVEF were increased(P<0.05),and the treatment group was superior to the control group(P<0.05).Conclusion:Shenqiyixin prescription can improve the TCM syndrome and heart function in patients with chronic heart failure of heart qi(yang)deficiency with blood stasis and fluid retention,at the same time,it can reduce the level of MEE and serum FFA in patients with heart failure.
基金Supported by the National Key Technologies Research and Development Program of China during the 10th Five-Year Plan Period(No.2003BA712A11)
文摘Objective:To observe the effects of Chinese drugs for supplementing qi,nourishing yin and activating blood circulation on the myocardial perfusion in acute myocardial infarction(AMI) patients after revascularization.Methods:Eighty patients with anterior or inferior ventricular wall AMI,who had received revascularization by intravenous thrombolysis or coronary bypass,were randomized into the treated group and the control group equally,both treated with conventional Western medical treatment,but combined,resp...
文摘Objective: To observe the effect of Chinese herbal medicine for nourishing yin, supplementing qi, and activating blood on the expression of interferen- γ (IFN-γ,)/interleukin-4 (IL-4) in peripheral blood and disease activity in primary Sjogren's syndrome (pSS) patients, and to study the relationship between the immune balance of Th1/Th2 and the disease activity. Methods: A total of 66 pSS patients were randomized with tossing coins method into two groups: the integrative therapy group (34 cases) and the control group (32 cases); and 28 healthy subjects were taken as the normal group. The integrative therapy group was treated by Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood combined with hydroxychloroquine sulfate tablets and the control group was treated with hydroxychloroquine sulfate tablets. The treatment course was 3 months for both groups. The levels of serum immunoglobulin G (IgG), erythrocyte sedimentation rate (ESR), IFN-γand IL-4 in peripheral blood were measured before and after treatment. Results: Compared with the normal group, the levels of IgG, ESR, IFN- γ and IL-4 were significantly increased in pSS patients (P〈0.05). Remarkably, after 3 months of treatment, these levels were dramatically decreased in both the integrative therapy group and the control group, although still higher than the normal group. The levels of IgG, ESR, IFN- and IL-4 in the integrative therapy group were lower than the control group and the same group before treatment (P〈0.05). The ratio of IFN-γ/IL-4 also significantly decreased after treatment. Moreover, the level of IFN- γ, and the ratio of IFN- γ/IL-4 in the integrative theraphy group were significantly lower than the control group (P〈0.05). For all patients the ratio of IFN-γ/IL-4 before and after treatment was positive correlated with the levels of IgG and ESR. Conclusion: Chinese herbal medicine for nourishing yin, supplementing qi, and activating blood can alleviate the disease activity of pSS by regulating the immune balance of Th1/Th2.
基金Supported by the National Natural Science Foundation of China(No.81473604)
文摘ABSTRACT Objective: To investigate the effect of Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood on the reproductive endocrine-immune network and its mechanisms in patients with primary Sjogren's syndrome (pSS). Methods: Seventy pSS patients were randomly assigned to two groups using a randomized digital table: the integrative therapy group (36 cases) and the control group (34 cases). Thirty healthy subjects were taken as a normal group. The control group was treated with hydroxychloroquine sulfate tablets alone, and the integrative therapy group was treated by Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood combined with hydroxychloroquine sulfate tablets. The treatment course was 6 months for both groups. Before and after treatment, serum estradiol (E2), testosterone (T), luteinizing hormone (LH), prolactin (PRL) by radioimmunoassay and immunoglobulin (IgG) by immunodiffusion, erythrocyte sedimentation rate (ESR) by Westergren, interferon-γ (IFN-γ) and interleukin-4 (IL-4) by enzyme linked immunosorbent assay were determined. Results: E2 and T levels in all patients were lower than those of normal subjects before treatment (P〈0.05) and were increased significantly after 6-month treatment (P〈0.05). ESR, FSH, LH, IgG, IFN - γ, IL - 4 and ratios of E2/T, and IFN --γ/IL in the patients were higher than those of normal subjects before the treatments (P〈0.05), and were reduced significantly after the treatments (P〈0.05). The T and IFN -γ levels and E2/T ratio in the patients treated with integrative therapy were reduced significantly compared with the control group (P〈0.05). However, the PRL levels before and after treatment were not significantly changed in the two groups (P〉0.05). The ratios of E2/T and IFN -γ/IL-4, and levels of IgG and ESR were positively correlated before and after treatment (P〈0.05). Conclusions: The ratios of E2/T and IFN - γ/ IL-4 might be used as indicators of pSS activity. Chinese herbal medicines for nourishing yin, supplementing qi, and activating blood combined with Western medicine could improve the therapeutic effect by regulating the reproductive endocrine-immune network in pSS patients.
基金Supported by the Key Projects in the National Science and Technology Pillar Program during the Eleventh Five-year Plan Period(No.2006BA104A01)
文摘Objective: To investigate the effects of Chinese herbs for supplementing qi, nourishing yin and activating blood circulation on heart function of patients with acute coronary syndrome (ACS) after successful percutaneous coronary intervention (PCI). Methods: One hundred patients with ACS after successful PCI were randomly assigned to a Western medicine (WM) treatment group (WMG) and a combined treatment group (CMG) treated by Chinese herbs for supplementing qi, nourishing yin and activating blood circulation, besides Western medicine treatment, with 50 cases in each group. Both treatment courses were 6 months. The follow- up was scheduled at baseline, 6 months and 1 year after PCI, and New York Heart Association (NYHA) functional class, Chinese medicine (CM) symptom scores, blood stasis syndrome scores, and major adverse cardiovascular events (MACE) were observed, serum levels of N-terminal pro-brain natriuretic peptide (NT-proBNP) and hyper-sensitivity C-reactive protein (Hs-CRP) were measured, an echocardiogram was conducted to examine left ventricular ejection fraction (LVEF), left ventricular end-diastolic volume (LVEDV), left ventricular end-systolic volume (LVESV), inter-ventricular septal thickness (IVST), left ventricular posterior wall thickness (LVPWT), and ventricular wall motion index (VWMI). Results: Compared with the baseline, LVEF significantly increased (P〈0.01), and CM symptom scores, blood stasis syndrome scores, VWMI, LVEDV, LVESV, NT-proBNP, and Hs-CRP all decreased (P〈0.01) in both groups at 6 months and at 1 year after PCI. There were no significant differences in all the above parameters at 1 year vs those at 6 months after PCI (P〉0.05). VWMI, LVEDV, LVESV, NT-proBNP, Hs-CRP, LVEF, and CM symptom and blood stasis syndrome scores were all improved obviously in CMG than those in WMG (P〈0.05 or P〈0.01) at 6 months and at 1 year after PCI. There were no significant differences in NYHA functional class between CMG and WMG at different follow-up timepoints; it was notable that P value was 0.054 when comparing the cases of NYHA functional class between the two groups at 1-year follow-up. During the 1-year follow-up, 3 MACE and 11 MACE occurred in CMG and WMG, respectively; the MACE rate in CMG was lower than that in WMG (6% vs 22%, P〈0.05). Conclusion: Chinese herbs for supplementing qi, nourishing yin and activating blood circulation could improve heart function, reduce the CM symptom scores and blood stasis syndrome scores, and decrease the incidence of MACE in patients with ACS after successful PCI.
文摘Objective: To explore the therapeutic effect and the possible working mechanism in using Chinese herbal medicine (CHM) for supplementing Kidney and Qi, and activating blood circulation in treating intrauterine growth retardation of fetus (IUGR). Methods: Fifty-five cases of IUGR were divided into two groups, 30 cases in the CHM group treated with CHM and the 25 in the control group treated with amino acids. The effect of CHM treatment was observed and compared with that of the control group, normal pregnancy group and non-treated IUGR group. Results: Body weight of the newborns in the CHM was markedly higher than that in the control group. Not only the maternal fundal height (FH) and the abdominal circumference (AC), but also the fetal growth parameters, including biparietal diameter, head circumference (HC), and femur length (FL) in the CHM group increased much faster than those in the control group. After CHM treatment, the maternal serum levels of estriol (E3) and human placental lactogen (hPL) approached to those in the normal pregnancy group, but the control group,in comparison with the normal pregnancy group, was significantly different. The umbilical venous plasma concentration of essential amino acids in both treated groups improved, but the improvement in the CHM group was more significant than that in the control group. No apparent adverse effect of CHM was observed in either mother or fetus.Conclusion: CHM for supplementing Kidney and Qi and activating blood circulation was more effective in improving placental function and enhancing amino acid transportation than amino acid