Remote ischemic conditioning-induced hyperacute and acute responses of plasma proteome in healthy young male adults:a quantitative proteomic analysis

Background: Long-term remote ischemic conditioning (RIC) has been proven to be beneficial in multiple diseases, such as cerebral and cardiovascular diseases. However, the hyperacute and acute effects of a single RIC stimulus are still not clear. Quantitative proteomic analyses of plasma proteins following RIC application have been conducted in preclinical and clinical studies but exhibit high heterogeneity in results due to wide variations in experimental setups and sampling procedures. Hence, this study aimed to explore the immediate effects of RIC on plasma proteome in healthy young adults to exclude confounding factors of disease entity, such as medications and gender. Methods: Young healthy male participants were enrolled after a systematic physical examination and 6-month lifestyle observation. Individual RIC sessions included five cycles of alternative ischemia and reperfusion, each lasting for 5 min in bilateral forearms. Blood samples were collected at baseline, 5 min after RIC, and 2 h after RIC, and then samples were processed for proteomic analysis using liquid chromatography-tandem mass spectrometry method. Results: Proteins related to lipid metabolism (e.g., Apolipoprotein F), coagulation factors (hepatocyte growth factor activator preproprotein), members of complement cascades (mannan-binding lectin serine protease 1 isoform 2 precursor), and inflammatory responses (carboxypeptidase N catalytic chain precursor) were differentially altered at their serum levels following the RIC intervention. The most enriched pathways were protein glycosylation and complement/coagulation cascades. Conclusions: One-time RIC stimulus may induce instant cellular responses like anti-inflammation, coagulation, and fibrinolysis balancing, and lipid metabolism regulation which are protective in different perspectives. Protective effects of single RIC in hyperacute and acute phases may be exploited in clinical emergency settings due to apparently beneficial alterations in plasma proteome profile. Furthermore, the beneficial effects of long-term (repeated) RIC interventions in preventing chronic cardiovascular diseases among general populations can also be expected based on our study findings.

Mitochondrial haplogroups associated with Japanese centenarians, Alzheimer's patients, Parkinson's patients, type 2 diabetic patients and healthy non-obese young males

The relationships between five classes of Japanese people （i.e., 96 centenarians, 96 Alzheimer＇s disease （AD） patients, 96 Parkinson＇s disease （PD） patients, 96 type 2 diabetic （T2D） patients, and 96 healthy non-obese young males） and their mitochondrial single nucleotide polymorphism （mtSNP） frequencies at individual mtDNA positions of the entire mitochondrial genome were examined using the radial basis function （RBF） network and the modified method. New findings of mitochondrial haplogroups were obtained for individual classes. The five classes of people were associated with the following haplogroups： Japanese centenarians-M7b2, D4b2a, and B5b; Japanese AD patients-G2a, B4cl, and N9b1; Japanese PD patients-M7b2, B4e, and B5b; Japanese T2D patients-B5b, M8al, G, D4, and F1; and Japanese healthy non-obese young males-D4g and D4b1b. From the points of common haplogroups among the five classes, the cente- narians have the common haplogroups M7b2 and B5b with the PD patients and common haplogroup B5b with the T2D patients. In addition, the 112 Japanese semi-supercentenarians （over 105 years old） recently reported were also examined by the method proposed. The results obtained were the haplogroups D4a, B4c1a, M7b2, F1, M1, and B5b. These results are different from the previously reported haplogroup classifications. As the proposed analysis method can predict a person＇s mtSNP constitution and the probabilities of becoming a centenarian, AD patient, PD patient, or T2D patient, it may be useful in initial diagnosis of various diseases.

Responses of the colonic microbiota and metabolites during fermentation of alginate oligosaccharides in normal individuals: An in vitro and in vivo study

Alginate oligosaccharides(AOS)have been reported to promote gut microbiota and sperm quality in male mice treated with busulfan.However,there is little evidence that AOS is directly influenced colonic microbiota and metabolites in healthy males.We administered AOS to rats by gavage for four weeks and observed significant regulation in the abundance of microbiota,including Bifidobacterium,Bacteroides,Anaerosptipes,Akkermania,Anaeroplasma,and Blautia,in the colon of male rats.In addition,AOS intervention significantly modulated colonic metabolites(butyrate,acetate,cytarabine,glycolic acid,and 3-hydroxybutyric acid)in healthy male rats.By contrast,there were no significant differences in the colonic metabolites of female rats.Further,we performed in vitro fermentation experiments using healthy male fecal samples and verified that AOS significantly increased the levels of Bacteroides,Anaerosptipes,and Blautia and promoted the content of butyrate and acetate in the fermentation broth.We also observed that these microbiotas were significantly positively correlated with cytarabine,3-hydroxybutyric acid,and glycolic acid.This study provides new evidence that AOS is a potential prebiotic in male functional foods.