OBJECTIVETo investigate the clinical features and plasmapheresis treatment outcome of hyperlipidemic acute pancreatitis among Uyghur population.

METHODSThe clinical data of 41 cases (treatment group) diagnosed with acute hyperlipidemic pancreatitis and treated with plasmapheresis from August 2007 to August 2012 was studied, and treatment outcomes were statistically analyzed. Fifty patients during the same period who received medical treatment without plasmapheresis (control group) were collected, and were compared to the treatment group. Clinical data of 72 Han Chinese patients with hyperlipidemic acute pancreatitis from the same study period were compared to 91 Uyghur patients mentioned above. The data were analyzed by t-test or χ2 test.

RESULTSTreatment group and control group were comparable in terms of gender, age, APACHE II score at admission, BMI, and blood lipid levels. Thirty-two patients out of 41 in the treatment group were improved after routine medical treatment and plasmapheresis, but 9 died. In the control group, 28 out of 50 cases were improved, 22 died. The mortality of the treatment group was significantly lower than that of the control group(χ2 = 10. 824, P = 0. 001). Time of hospital stay in treatment group was (17 ± 16) days, and significantly shorter than that of control group ((28 ± 20) days) (t= 2. 851, P = 0. 005). Before plasmapheresis in the treatment group, serum triglyceride and total cholesterol levels were (58 ± 39) mmol/L and (24 ± 8) mmol/L, after plasmapheresis, these values dropped significantly to (10 ± 10) mmol/L and (6 ± 5) mmol/L. APACHE II score of those died were 18 ± 2, and significantly higher than those who survived(11 ± 3) (t = 0. 570, P = 0. 000); Time from hospital admission until plasmapheresis were significantly longer in died patients ((49 ± 9) hours) than in survived patients ((38 ± 8) hours, t = 3. 549, P = 0. 040). Furthermore, serum triglyceride levels were significantly higher in survived cases ((46 ± 16) mmol/L) than those who died ((37 ± 15) mmol/L) (t = 2. 386, P = 0. 010) . Both serum triglyceride and cholesterol levels were reduced significantly in control group (t = 3. 484, P = 0. 00; t = 4. 086, P = 0. 000, but the degrees of reduction were significantly lower than that of the treatment group. When comparing Uyghur patients to Han patients, Uyghur cases had higher serum triglyceride (t = 2. 083, P = 0. 039), and cholesterol levels (t = 2. 535, P = 0. 012, and their age was significantly younger than that of Hans (t = 3. 373, P = 0. 010 .

CONCLUSIONSs Uyghur patients with hyperlipidemia acute pancreatitis tend to have higher serum triglyceride and cholesterol levels, and age at disease onset is younger. Plasmapheresis is a more effective treatment option for patients with hyperlipidemia acute pancreatitis. Treatment outcome is related to APACHE II score, serum triglyceride levels, and time frame between admission and plasmapheresis treatment.

APACHE ; Acute Disease ; Asian Continental Ancestry Group ; Humans ; Hyperlipidemias ; complications ; therapy ; Length of Stay ; Pancreatitis ; complications ; therapy ; Plasmapheresis ; Time-to-Treatment ; Treatment Outcome ; Triglycerides ; blood

Objective To investigate the effect of tumor-associated macrophage exosomes on glycolysis of pancreatic cancer cells and its mechanism.Methods The THP-1 cells were induced to differentiate into the M0 and M2 macrophages,and the exosomes(M0 exo and M2 exo)were extracted.The pancreatic cancer cells CAPAN-2 and ASPC-1 were divided into the PBS group,the M0 exo group,the M2 exo group and the M2 exo+siKRAS group,and co-incubated with equal volumes of PBS,10 μg/mL of M0 exo,10 μg/mL of M2 exo,and transfection of KRAS siRNA and 10 μg/mL of M2 exo,respectively.Transmission electron microscopy was used to observe the structure of exosomes;CCK-8 was used to detect the cell proliferation capacity;the kit was used to detect the glucose uptake rate and production level of lactic acid,and Western blot was used to detect the exosome markers expression,KRAS protein expression and ERK1/2 phosphorylation level.Results THP-1 was induced to differentiate into M2 macrophages expressing Arg-1 and IL-10 marker proteins.M0 exo and M2 exo had a bilayer membrane structure with a particle size of about 100 nm and expressed exosomal marker proteins of CD9,CD81,and TSG101.Compared with the PBS group,the cell proliferation,glucose uptake rate,production level of lactic acid of CAPAN-2 and ASPC-1 cells in the M2 exo group increased significantly(P<0.05),and the KRAS expression and ERK1/2 phosphorylation level were significantly increased(P<0.001).Compared with the M2 exo group,the proliferation,glucose uptake rate and production level of lactic acid of CAPAN-2 and ASPC-1 cells in the M2 exo+siKRAS group decreased significantly(P<0.05).Conclusion Tumor-associated macrophage exosomes can promote the glycolysis of pancreatic cancer cells via the activation of KRAS signaling pathway.