Objective To evaluate the efficiency of Ginkgo biloba extract 50 (GBE50) on learning memory ability and inflammatory response in hippocampus of natural aging mice, and explore the underlying anti-aging mechanisms.Methods 16-month-old ICR mice were randomly divided into three groups:model group, GBE50 low and high dose groups. 1 month mice were as normal group. The mice in GBE50 low and high dose groups received GBE50. The mice in the normal and model groups received solvent (1%CMC-Na+) by intragastric administration. The Morris water maze test and step-down test were used to assess behaviors of the mice. Immunofluorescent staining was used to detect the number of Iba-1 positive cells. The enzyme linked immunosorbent assay was used to determine the expression of TNF-α and IL-1β.Results Compared with normal group, escape latency and swimming distance in the Morris water maze test in the model group increased (P<0.05);latency shorted and error times decreased in the step-down test (P<0.05);the number of Iba-1 positive cell in the hippocampus CA1 in the model group increased considerably (P<0.01);TNF-α expression was in a general upward trend while IL-1β increased apparently (P<0.01). Compared with model group, escape latency and swimming distance decreased in the Morris water maze test in GBE50 high dose group;latency and the error times increased in the step-down test (P<0.05);the number of Iba-1 positive cells decreased (P<0.05). TNF-α expression showed a downward trend and IL-1β expression decreased in GBE50 low dose group (P<0.05). Conclusion GBE50 can delay aging and increase learning memory of natural aging mice.

Objective:To investigate the correlation between variations in mitochondrial DNA (mtDNA) control region (D-loop) and keloids.Methods:A total of 216 patients with keloids were collected from Department of Dermatology, the First Affiliated Hospital of Kunming Medical University from 2016 to 2019. Total DNA was extracted from peripheral blood samples of all the patients, as well as keloid tissues and perilesional normal skin tissues of 25 patients with keloids. Peripheral blood samples were collected from 299 health checkup examinees without keloids in Health Examination Center, the Affiliated Hospital of Yunnan University, who served as controls. PCR amplification and Sanger sequencing were performed on the mtDNA D-loop region, and mutation sites in each sample were analyzed by comparisons with the revised Cambridge Reference Sequence (rCRS) . Haplogroups were assigned in the 2 groups by using Phylotree-mtDNA tree Build 17. Mutations in the mtDNA D-loop region were compared among keloid tissues, perilesional normal skin tissues and peripheral blood samples. A median-joining network was constructed via network 5.0 software. Binary logistic regression analysis was performed to investigate the correlation between haplogroup frequencies and the occurrence of keloids, and chi-square, t and t′ tests were used to analyze clinical data. Results:Among the 216 patients with keloids, variations in mtDNA D-loop region were classified into 10 haplogroups, including A, B, D, R9, G, M*, M7, M8, M9 and N9, with the haplogroups R9 and M9 showing the highest (21.3%, 46/216) and lowest (0.9%, 2/216) frequencies respectively. The frequencies of haplogroups M7 ( P=0.040, OR=0.248, 95% CI: 0.066 - 0.937) and N9 ( P=0.048, OR=0.191, 95% CI: 0.037-0.986) were significantly lower in the patients with keloids than in the controls. The median-joining network plot showed that the distribution pattern of the haplogroup M7 differed between the patients with keloids and controls. Significantly less number of lesional sites and younger age of onset were observed in the patients with haplogroup M7 compared with those with non-M7 haplogroups ( P=0.000 1, 0.045, respectively) . Conclusion:The haplogroup M7 is correlated with the occurrence of keloids, and may be a potential protective factor for keloid formation.

Objective To study the effect of IZL-2003Ⅱ Immune Therapy System on lymphocyte immuno-function induced by chemotherapy in advanced non-small-cell lung cancer(NSCLC)patients.Methods 112 cases of advanced NSCLC patients were randomly divided into the two groups .The treatment group ( n=56 ) was given IZL-2003ⅡImmune Therapy System after chemotherapy for 6d as a couse and the control group ( n=56) was given chem-otherapy only.The peripheral blood routine and T lymphocyte subgroup (CD3+,CD4+, CD8+and CD4+/CD8+)activity of patients in both group were measured by flow cytometry 1 day before chemotherapy and the 8th day after chemothera-py.ResultsThere was difference between the treatment group and control group on the increasing rate of Leucocyte (P<0.05)the 8th day after treatment;After the 8th day,the expression levels of CD8+T cells was lower,but has no significant(P<0.05);The expression levels of CD3+,CD4+and the ratio of CD4+/CD8+were higher in the treatment group(P<0.05).The expression levels of CD3+T cells was lower,but has no significant(P<0.05);The expression levels of CD4+T cells and the ratio of CD 4+/CD8+were significantly lower after treatment in control group ( P<0.05);the expression levels of CD8+T cell was higher significantly in the control group (P<0.05).Conclusion IZL-2003ⅡImmune Therapy System can antagonize myelosuppression and elevated the immunologyical function of advanced NSCLC patients significantly .

Objective:To evaluate the effects of Preventing Jaundice and Antibacterial Biological Medical Gel in prevention of hyperbilirubinemia and umbilical infection in newborn.Methods:A total of 600 healthy neonates in a tertiary hospital were selected. Participants were randomly divided into the control group ( n=300) and the observation group ( n=300). The control group was given routine nursing guidance while the observation group was treated with Preventing Jaundice and Antibacterial Biological Medical Gel. The differences in the number of times of the fetus feces in 3 days after birth, the first fetal feces, yellow discharge time of the fetus feces, the incidence of hyperbilirubinemia, the incidence of neonatal phototherapy and the incidence of umbilical infection between the two groups were compared. Results:The number of times of the fetus feces in 3 days after birth and the first fetal feces and yellow discharge time of the fetus feces of the observation group were (8.12±1.36) times, (7.39±3.71) hours, (26.05±3.98) hours, respectively. The control group were (5.31±1.02) times, (13.04±5.26) hours, (28.65±3.54) hours, respectively. The difference between the two groups was significant ( Z value was -6.133, -6.483, t value was -19.011, P<0.05). The incidence of hyperbilirubinemia, being in neonatal intensive care unit, the incidence of blue light irradiation and the incidence of umbilical infection of the observation group was 0.67%(2/300), 0, 1.00%(3/300) and 0, respectively. The control group was 3.33%(10/300), 2.00%(6/300), 5.00%(15/300) and 3.33%(10/300), respectively. the difference between the two groups was significant ( χ2 value was 4.209-8.247, P<0.01). Conclusions:Preventing Jaundice and Antibacterial Biological Medical Gel could help control the incidence of hyperbilirubinemia and reduce the umbilical infection. It is worth clinical spreading.

Objective:To evaluate the skin development and repair process of X-ray radiation damage in rat with non-invasive two-photon excitation fluorescence (TPEF) imaging technology in vivo. Methods:Totally 24 SD rats were randomly divided into four groups including X-ray irradiated group (25, 35 and 45 Gy) and non-irradiation control group. At different times after irradiation, the degree of skin injury was evaluated, and the pathological changes of nicotinamide adenine dinucleotide (phosphate) [NAD(P)H] and collagen fiber fluorescence signals in epidermal cells were detected in vivo by TPEF imaging technology. Results:At 10 d post-irradiation, the skin of irradiation groups showed erythema and desquamation. At 15-20 d post-irradiation, the skin of radiation groups developed progressive exudation, edema and ulcers with increasing radiation dose. On day 25, the skin began to repair in the 25 Gy group, however, the skin of other groups still had exudation and ulcers. On day 10, NAD(P)H fluorescence signal in epidermal cells of irradiation groups decreased and the fluorescence signal of collagen fibers in papillary layer and reticular layer of irradiation groups reduced, which were significantly lower than that of normal control group ( t=24.145, 28.303, 26.989, 6.654, 7.510, 7.997, P<0.05). On day 30, fluorescence signal of NAD(P)H and collagen fibers in epidermal cells and dermis began to repair, the cell from stratum granulosum, stratum spinosum, and stratum basale in the 25 Gy group showed fluorescence signal, the other groups did not show. The fluorescence signal of collagen fibers in the 25 Gy group were gradually increased in papillary layer and reticular layer, however, they were significantly lower than normal control group ( t=115.133, 17.431, P<0.05), the skin of 45 Gy group did not show fluorescence signal of collagen fibers. Conclusions:The damage and repair process of epidermal cells and dermal collagen fiber can be detected noninvasively by TPEF imaging technology after X-ray irradiation in vivo.