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Daily News: Vitamins

Findings from University of California Broaden Understanding of Myoblasts


NewsRx.com

10-11-13

By a News Reporter-Staff News Editor at AIDS Weekly -- Current study results on Myoblasts have been published. According to news reporting from La Jolla, California, by NewsRx journalists, research stated, "To evaluate the impact of the active metabolite of vitamin D, 1?,25-dihydroxycholecalciferol (1,25D3), on nucleoside reverse transcriptase inhibitor (NRTI) induced mitochondrial DNA (mtDNA) depletion in human skeletal muscle myoblasts and myotubes. mtDNA was quantified in human skeletal muscle myoblasts and myotubes following 1,25D3 and NRTI treatment using real-time PCR. Human skeletal muscle myoblasts and myotubes were treated with didanosine (ddI), stavudine (d4T), zidovudine (ZDV), lamivudine (3TC) and abacavir (ABC) alone or in combination either in the presence or absence of 1,25D3 for 5 days."

The news correspondents obtained a quote from the research from the University of California, "Cells were harvested, DNA extracted and mtDNA quantified. ddI and ddI-d4T significantly decreased both myoblast and myotube mtDNA in the absence of 1,25D3 compared with untreated controls (P?0.029). In addition, the ZDV-3TC combination resulted in a 47% decrease in myotube mtDNA (p=0.005). 1,25D3 increased myotube mtDNA levels in ddI, ZDV, 3TC, ABC, ddI-d4T, d4T-3TC, ZDV-3TC, ZDV-ABC and ZDV-3TC-ABC-containing regimens and myoblast mtDNA levels in ddI, d4T, ZDV, 3TC, ddI-d4T, ZDV-3TC and ZDV-ABC-containing regimens. Of note, 1,25D3 protected against myotube mtDNA depletion following ZDV-3TC treatment, rendering them similar to 1,25D3 untreated controls (p=0.62), and increased both myotube and myoblast mtDNA two to three-fold in ddI-containing regimens (p <0.05). 1,25D3 confers a protective effect against NRTI-induced mitochondrial toxicity in skeletal muscle myoblasts and myotubes."

According to the news reporters, the research concluded: "These findings support a protective role for vitamin D in preventing mitochondrial toxicity and suggest that supplemental vitamin D may protect against NRTI-associated mitochondrial toxicity."

For more information on this research see: Vitamin D attenuates nucleoside reverse transcriptase inhibitor induced human skeletal muscle mitochondria DNA depletion. Aids, 2013;27(9):1397-401. (Lippincott Williams and Wilkins - www.lww.com; Aids - journals.lww.com/aidsonline/pages/default.aspx)

Our news journalists report that additional information may be obtained by contacting G.R. Campbell, Dept. of Pediatrics, Division of Infectious Diseases, University of California San Diego, La Jolla, California 92093-0672, United States. Additional authors for this research include Z.T. Pallack and S.A Spector (see also Myoblasts).

Keywords for this news article include: Cells, La Jolla, Myoblasts, Treatment, California, DNA Research, United States, North and Central America.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC

To see more of the NewsRx.com, or to subscribe, go to http://www.newsrx.com .

2007 NewsRx.com. All Rights Reserved.Copyright 2013, AIDS Weekly via NewsRx.com

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