Particle Size

Publication Title: 
JAMA: the journal of the American Medical Association

CONTEXT: Individuals with exceptional longevity have a lower incidence and/or significant delay in the onset of age-related disease, and their family members may inherit biological factors that modulate aging processes and disease susceptibility. OBJECTIVE: To identify specific biological and genetic factors that are associated with or reliably define a human longevity phenotype.

Author(s): 
Barzilai, Nir
Atzmon, Gil
Schechter, Clyde
Schaefer, Ernst J.
Cupples, Adrienne L.
Lipton, Richard
Cheng, Suzanne
Shuldiner, Alan R.
Publication Title: 
JAMA: the journal of the American Medical Association
Author(s): 
Andrikopoulos, George K.
Richter, Dimitri J.
Publication Title: 
Clinical Cardiology

BACKGROUND: Asian Indian women have a higher rate of coronary artery disease (CAD) than do other ethnic groups, despite similar conventional risk factors and lipid profiles. Smaller high-density lipoprotein cholesterol (HDL-C) particle size is associated with reduced cardiac protection or even an increased risk of CAD. Exceptional longevity correlates better with larger HDL-C particle sizes.

Author(s): 
Bhalodkar, Narendra C.
Blum, Steve
Rana, Thakor
Kitchappa, Radha
Bhalodkar, Ami N.
Enas, Enas A.
Publication Title: 
International Journal of Nanomedicine

We developed a novel method to prepare nanocapsules. A solute often crystallizes when its solubility alters from one solvent to another, and its firstborn crystals are used as templates to prepare nanocapsules for the first time, which is called firstborn microcrystallization method. By using this method, the maximum diameter of the nanocapsules including artesunate is about 76 nm, and wrapping state is well.

Author(s): 
Xiao, Xin-Cai
Hong, Zong-Guo
Publication Title: 
Journal of Vector Borne Diseases

BACKGROUND & OBJECTIVES: With the current snags from the use of Artemisinin - combination therapies (ACTs) in malaria treatment in addition to fear of cross- resistance to unrelated drugs, raising the immunocompetence of individuals in malaria endemic areas by vaccination is the best approach to malaria - free world. METHODS: Water - soluble cationic derivative, N, N, N- trimethylchitosan (TMC) was synthesized from chitosan.

Author(s): 
Nnamani, P. O.
Scoles, G.
Kröl, S.
Publication Title: 
International Journal of Molecular Sciences

The particle sizes of pharmaceutical substances are important for their bioavailability. Bioavailability can be improved by reducing the particle size of the drug. In this study, artemisinin was micronized by the rapid expansion of supercritical solutions (RESS). The particle size of the unprocessed white needle-like artemisinin particles was 30 to 1200 ?m. The optimum micronization conditions are determined as follows: extraction temperature of 62 °C, extraction pressure of 25 MPa, precipitation temperature 45 °C and nozzle diameter of 1000 ?m.

Author(s): 
Yu, Huimin
Zhao, Xiuhua
Zu, Yuangang
Zhang, Xinjuan
Zu, Baishi
Zhang, Xiaonan
Publication Title: 
Daru: Journal of Faculty of Pharmacy, Tehran University of Medical Sciences

BACKGROUND: Artemisinin is the major sesquiterpene lactones in sweet wormwood (Artemisia annua L.), and its combination with transferrin exhibits versatile anti-cancer activities. Their non-selective targeting for cancer cells, however, limits their application. The aim of this study was to prepare the artemisinin and transferrin-loaded magnetic nanoliposomes in thermosensitive and non-thermosensitive forms and evaluate their antiproliferative activity against MCF-7 and MDA-MB-231 cells for better tumor-targeted therapy.

Author(s): 
Gharib, Amir
Faezizadeh, Zohreh
Mesbah-Namin, Seyed Ali Reza
Saravani, Ramin
Publication Title: 
Journal of Pharmaceutical and Biomedical Analysis

The preparation method of metal based Indian traditional drugs involves conversion of a pure metal into its oxide by repeated high temperature calcination cycles. In this work, the effect of number of calcination cycles followed in the preparation of tin oxide based Ayurvedic drug, 'vanga bhasma' was studied by a systematic characterization of the drug samples after various calcination stages. It was found that tin was in the form of Sn4+ state and that the formation of SnO2 proceeded step-wise through Sn(OH)4.

Author(s): 
Wadekar, M. P.
Rode, C. V.
Bendale, Y. N.
Patil, K. R.
Gaikwad, A. B.
Prabhune, A. A.
Publication Title: 
Journal of Biomedical Nanotechnology

Ayurveda is one of the oldest systems of medicine, practiced in Indian sub continent. We are working to calibrate classical parameters of good manufacturing practices of Ayurvedic bhasma on parameters and language of contemporary science. Bhasma in accordance of classical expectation are Swarna bhasma, Makshika bhasma, Abhrak bhasma, Tamra bhasma and Louha bhasma. X-ray diffraction, TEM and particle size analysis revealed that these bhasma are in nanometer dimension. These bhasma may be considered as nanomedicine and are free from toxicity in therapeutic doses.

Author(s): 
Chaudhary, Anand
Publication Title: 
Arteriosclerosis, Thrombosis, and Vascular Biology

OBJECTIVES: The enzyme acyl-coenzymeA (CoA):cholesterol O-acyltransferase 2 (ACAT2) in the liver synthesizes cholesteryl esters (CE) from cholesterol and fatty acyl-CoA, which get incorporated into apoB-containing lipoproteins that are secreted into the bloodstream. Dietary fatty acid composition influences the amount and fatty acid composition of CE within apoB-containing lipoproteins.

Author(s): 
Bell, Thomas A.
Kelley, Kathryn
Wilson, Martha D.
Sawyer, Janet K.
Rudel, Lawrence L.

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