scholarly journals Overexpression of the peroxin Pex34p suppresses impaired acetate utilization in yeast lacking the mitochondrial aspartate/glutamate carrier Agc1p

2019 ◽  
Vol 19 (8) ◽  
Author(s):  
Chalongchai Chalermwat ◽  
Thitipa Thosapornvichai ◽  
Parith Wongkittichote ◽  
John D Phillips ◽  
James E Cox ◽  
...  
Keyword(s):  
Metabolomic Analysis ◽  
Acetyl Coenzyme A ◽  
Suppressor Effect ◽  
Synthetic Reactions ◽  
Acetate Utilization ◽  
Redox Shuttle ◽  
Acetate Medium ◽  
Increased Activity ◽  
Oxoglutarate Carrier ◽  
Aspartate Glutamate Carrier

ABSTRACT PEX34, encoding a peroxisomal protein implicated in regulating peroxisome numbers, was identified as a high copy suppressor, capable of bypassing impaired acetate utilization of agc1∆ yeast. However, improved growth of agc1∆ yeast on acetate is not mediated through peroxisome proliferation. Instead, stress to the endoplasmic reticulum and mitochondria from PEX34 overexpression appears to contribute to enhanced acetate utilization of agc1∆ yeast. The citrate/2-oxoglutarate carrier Yhm2p is required for PEX34 stimulated growth of agc1∆ yeast on acetate medium, suggesting that the suppressor effect is mediated through increased activity of a redox shuttle involving mitochondrial citrate export. Metabolomic analysis also revealed redirection of acetyl-coenzyme A (CoA) from synthetic reactions for amino acids in PEX34 overexpressing yeast. We propose a model in which increased formation of products from the glyoxylate shunt, together with enhanced utilization of acetyl-CoA, promotes the activity of an alternative mitochondrial redox shuttle, partially substituting for loss of yeast AGC1.

Preliminary comparative deep metabolomic analysis of spermatozoa from zebu and crossbred cattle suggests associations between metabolites, sperm quality and fertility

2021 ◽  
Vol 33 (6) ◽  
pp. 427
Author(s):  
Mohua DasGupta ◽  
Arumugam Kumaresan ◽  
Kaustubh Kishor Saraf ◽  
Gayathree Karthikkeyan ◽  
T. S. Keshava Prasad ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Semen Quality ◽  
Sperm Quality ◽  
Tandem Mass ◽  
Metabolomic Analysis ◽  
Metabolomic Profile ◽  
Crossbred Cattle ◽  
Acetyl Coenzyme A ◽  
Chromatography Tandem Mass Spectrometry ◽  
Liquid Chromatography Tandem Mass

Poor semen quality and infertility/subfertility are more frequent in crossbred than zebu bulls. Using a high-throughput liquid chromatography–tandem mass spectrometry (LC-MS/MS)-based approach, we established the preliminary metabolomic profile of crossbred and zebu bull spermatozoa (n=3 bulls each) and identified changes in sperm metabolomics between the two groups. In all, 1732 and 1240 metabolites were detected in zebu and crossbred bull spermatozoa respectively. After excluding exogenous metabolites, 115 and 87 metabolites were found to be unique to zebu and crossbred bull spermatozoa respectively whereas 71 metabolites were common to both. In the normalised data, 49 metabolites were found to be differentially expressed between zebu and crossbred bull spermatozoa. The significantly enriched (P<0.05) pathways in spermatozoa were taurine and hypotaurine metabolism (observed metabolites taurine and hypotaurine) in zebu and glycerophospholipid metabolism (observed metabolites phosphatidylcholine, phosphatidylethanolamine and phosphatidylserine) in crossbred bulls. The abundance of nitroprusside (variable importance in projection (VIP) score >1.5) was downregulated, whereas that of l-cysteine, acetyl coenzyme A and 2′-deoxyribonucleoside 5′-diphosphate (VIP scores >1.0) was upregulated in crossbred bull spermatozoa. In conclusion, this study established the metabolomic profile of zebu and crossbred bull spermatozoa and suggests that aberrations in taurine, hypotaurine and glycerophospholipid metabolism may be associated with the higher incidence of infertility/subfertility in crossbred bulls.

Ultrastructural Cytopiasmic Changes of Adrenal Cortex During Pregnancy

1969 ◽  
Vol 27 ◽  
pp. 298-299
Author(s):  
T. M. Murad ◽  
Karen Israel ◽  
Jack C. Geer
Keyword(s):  
Adrenal Gland ◽  
Steroid Hormones ◽  
Adrenal Cortex ◽  
Lipid Droplets ◽  
Plasma Cholesterol ◽  
Adrenal Steroids ◽  
Dynamic Changes ◽  
Cortical Cells ◽  
Acetyl Coenzyme A ◽  
Adrenal Cortical Cells

Adrenal steroids are normally synthesized from acetyl coenzyme A via cholesterol. Cholesterol is also shown to enter the adrenal gland and to be localized in the lipid droplets of the adrenal cortical cells. Both pregnenolone and progesterone act as intermediates in the conversion of cholesterol into steroid hormones. During pregnancy an increased level of plasma cholesterol is known to be associated with an increase of the adrenal corticoid and progesterone. The present study is designed to demonstrate whether the adrenal cortical cells show any dynamic changes during pregnancy.

On the origin of increased activity in mechanochemistry of solids

1986 ◽  
Vol 83 ◽  
pp. 717-724 ◽  
Author(s):  
K.P. Thiessen
Keyword(s):  
Increased Activity

Mass spectrometry in microbial metabolomic analysis as an analytical tool for dereplication strategy

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
E Crevelin ◽  
L Beraldo de Moraes ◽  
I Soares de Melo
Keyword(s):  
Mass Spectrometry ◽  
Analytical Tool ◽  
Metabolomic Analysis

Rhabdomyolysis in DOMS

1999 ◽  
Vol 38 (05) ◽  
pp. 164-168 ◽  
Author(s):  
Gloria Ruiz Hernandez ◽  
C. Sanchez Marchori ◽  
J. Munoz Moliner ◽  
C. Martinez Carsi
Keyword(s):  
Bone Scintigraphy ◽  
Previous History ◽  
Biochemical Studies ◽  
History Of ◽  
Increased Activity

SummaryA 26-year-old man with a previous history of external twin bursitis was remitted to our Department for a bone scintigraphy. Before the study, the patient performed an elevated number of intense sprints. Bone scintigraphy showed a bilaterally increased activity in both anterior rectum muscles suggesting rhabdomyolysis. Biochemical studies and MRT confirmed the diagnosis.

Increased Activity of Vitamin K-Dependent Clotting Factors in Human Hyperlipoproteinaemia – Association with Cholesterol and Triglyceride Levels

1977 ◽  
Vol 38 (02) ◽  
pp. 0465-0474 ◽  
Author(s):  
M Constantino ◽  
C Merskey ◽  
D. J Kudzma ◽  
M. B Zucker
Keyword(s):  
Vitamin K ◽  
Plasma Lipids ◽  
Coagulation Factors ◽  
Clotting Factor ◽  
Factor X ◽  
Clotting Factors ◽  
Blood Coagulation Factors ◽  
Cholesterol Levels ◽  
Type V ◽  
Increased Activity

SummaryLevels of blood coagulation factors, cholesterol and triglyceride were measured in human plasma. Prothrombin was significantly elevated in type Ha hyperlipidaemia; prothrombin and factors VII, IX and X in type lib; and prothrombin and factors VII and IX in type V. Multiple regression analysis showed significant correlation between the levels of these plasma lipids and the vitamin K-dependent clotting factors (prothrombin, factors VII, IX and X). Higher cholesterol levels were associated with higher levels of prothrombin and factor X while higher triglyceride levels were associated with higher levels of these as well as factors VII and IX. Prothrombin showed a significant cholesterol-triglyceride interaction in that higher cholesterol levels were associated with higher prothrombin levels at all levels of triglyceride, with the most marked effects in subjects with higher triglyceride levels. Higher prothrombin levels were noted in subjects with high or moderately elevated (but not low) cholesterol levels. Ultracentrifugation of plasma in a density of 1.21 showed activity for prothrombin and factors VII and X only in the lipoprotein-free subnatant fraction. Thus, a true increase in clotting factor protein was probably present. The significance of the correlation between levels of vitamin K-dependent clotting factors and plasma lipids remains to be determined.

PENERAPAN PENDEKATAN PEMBELAJARAN PAKEM DALAM MENINGKATKAN HASIL BELAJAR MATEMATIKA SISWA KELAS IV SDN 002 BAGAN BESAR

2017 ◽  
Vol 5 (3) ◽  
pp. 411
Author(s):  
Elvi Zahara
Keyword(s):  
Active Learning ◽  
Student Learning ◽  
Learning Outcomes ◽  
Mathematics Teaching ◽  
Mathematics Learning ◽  
Student Learning Outcomes ◽  
Average Value ◽  
Increased Activity

The background of this research is the lack of students' mathematics learning outcomes. Thelow yield caused by the learning of mathematics teaching is so very boring, monotonous,stressful and meaningless. Departing from the problems that occur in the field, especially ingrade IV SDN 002 Bagan Besar then there needs to be a strategy that can provide learningmathematics is expected to show active learning, creative, effective and fun. This research istindaan class (PTK), instrument collecting data observation and test learning outcomes. Theresults obtained: Increased activity of the students from the first cycle to the second cycle arevery significant. The increase in active learning, creative, and fun efekif the students alsofollowed by an increase in student learning outcomes. This is evidenced by the increase in thelearning outcomes of the first cycle to the second cycle. Namely, from the average value of 88,27 (cycle I) increased to an average value of 97, 59 (cycle II).

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