scholarly journals Apolipoprotein A1 Forms 5/5 and 5/4 Antiparallel Dimers in Human High-density Lipoprotein

2019 ◽  
Vol 18 (5) ◽  
pp. 854-864 ◽  
Author(s):  
Yi He ◽  
Hyun D. Song ◽  
G. M. Anantharamaiah ◽  
M. N. Palgunachari ◽  
Karin E. Bornfeldt ◽  
...  
Keyword(s):  
High Density Lipoprotein ◽  
Density Lipoprotein ◽  
High Density ◽  
Apolipoprotein A1 ◽  
Human High Density Lipoprotein

scholarly journals Serum amyloid A-containing human high density lipoprotein 3. Density, size, and apolipoprotein composition.

1986 ◽  
Vol 261 (21) ◽  
pp. 9644-9651 ◽  
Author(s):  
G A Coetzee ◽  
A F Strachan ◽  
D R van der Westhuyzen ◽  
H C Hoppe ◽  
M S Jeenah ◽  
...  
Keyword(s):  
High Density Lipoprotein ◽  
Serum Amyloid A ◽  
Density Lipoprotein ◽  
High Density ◽  
Serum Amyloid ◽  
Amyloid A ◽  
Human High Density Lipoprotein

scholarly journals In Vitro Generation of Human High-Density-Lipoprotein-Resistant Trypanosoma brucei brucei

2006 ◽  
Vol 5 (8) ◽  
pp. 1276-1286 ◽  
Author(s):  
Sara D. Faulkner ◽  
Monika W. Oli ◽  
Rudo Kieft ◽  
Laura Cotlin ◽  
Justin Widener ◽  
...  
Keyword(s):  
High Density Lipoprotein ◽  
Trypanosoma Brucei ◽  
Density Lipoprotein ◽  
High Density ◽  
Surface Glycoprotein ◽  
Trypanosoma Brucei Brucei ◽  
African Trypanosomes ◽  
Expression Site ◽  
Human High Density Lipoprotein

ABSTRACT The host range of African trypanosomes is influenced by innate protective molecules in the blood of primates. A subfraction of human high-density lipoprotein (HDL) containing apolipoprotein A-I, apolipoprotein L-I, and haptoglobin-related protein is toxic to Trypanosoma brucei brucei but not the human sleeping sickness parasite Trypanosoma brucei rhodesiense. It is thought that T. b. rhodesiense evolved from a T. b. brucei-like ancestor and expresses a defense protein that ablates the antitrypanosomal activity of human HDL. To directly investigate this possibility, we developed an in vitro selection to generate human HDL-resistant T. b. brucei. Here we show that conversion of T. b. brucei from human HDL sensitive to resistant correlates with changes in the expression of the variant surface glycoprotein (VSG) and abolished uptake of the cytotoxic human HDLs. Complete transcriptome analysis of the HDL-susceptible and -resistant trypanosomes confirmed that VSG switching had occurred but failed to reveal the expression of other genes specifically associated with human HDL resistance, including the serum resistance-associated gene (SRA) of T. b. rhodesiense. In addition, we found that while the original active expression site was still utilized, expression of three expression site-associated genes (ESAG) was altered in the HDL-resistant trypanosomes. These findings demonstrate that resistance to human HDLs can be acquired by T. b. brucei.

Combined Detection of Free Fatty Acid (FFA) and High-Density Lipoprotein Cholesterol (HDL-C) is a Promising Pretreatment Biomarker for Predicting the Overall Prognosis (OS) of Neuroendocrine Tumours (NETs) in the Colorectum: A Case-Control Study.

2021 ◽  
Author(s):  
Bin Zhu ◽  
Dan Wu ◽  
Yuanyuan Yang ◽  
Pingli Yu ◽  
Haobo Huang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
High Density Lipoprotein ◽  
High Density Lipoprotein Cholesterol ◽  
Neuroendocrine Tumours ◽  
Tumour Size ◽  
Density Lipoprotein ◽  
High Density ◽  
Apolipoprotein A1 ◽  
Lipoprotein Cholesterol

Abstract Purpose The aim of the study was to evaluate the prognostic value of free fatty acid (FFA) and high-density lipoprotein cholesterol (HDL-C) in predicting colorectal neuroendocrine tumours (NETs). Methods One hundred patients with pathologically diagnosed colorectal NETs in 2011-2017 were enrolled, and the levels of FFA, HDL-C, low-density lipoproteincholesterol (LDL-C), triglycerides (TGs), cholesterol (CHOL), apolipoprotein A1 (ApoA1) and apolipoprotein B (ApoB) between colorectal NET patients and healthy controls matched by age and sex were compared. In addition, the association of clinicopathological characteristics and follow-up data with FFA and HDL-C was analysed. Results FFA was overexpressed (0.55±0.23 vs. 0.48±0.11, P= 0.006) and HDL-C was underexpressed (1.31±0.41 vs. 1.41±0.29, P=0.046) in colorectal NETs. FFA ≥0.52 mmol/L predicted lymph node metastasis (LNM) (χ2 = 5.964, P=0.015), and HDL-C ≤1.0 mmol/L predicted tumour size ≥2 cm (χ2 = 5.647, P=0.017). No significant association was found between FFA and tumour size (P=0.142) or HDL-C and LNM (P=0.443). FFA ≥0.52 mmol/L (χ2 = 6.016, P=0.014) and HDL-C ≤1.0 mmol/L predicted worse overall survival (OS) (χ2 = 5.488, P=0.019). FFA ≥0.52 mmol/L in combination with HDL-C ≤1.0 mmol/L predicted an even worse prognosis in terms of OS (χ2 = 4.818, P=0.028). Conclusion FFA ≥0.52 mmol/L and HDL-C ≤1.0 mmol/L were promising cut-off values in predicting LNM, tumour size and worse OS in colorectal NETs.

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