07
Jan
10

HIV-Infected Postmenopausal Women at High Risk for Bone Fractures

“As HIV-infected individuals live longer with potent antiretroviral therapy (ART), metabolic complications such as low bone density and osteoporosis are increasingly recognized,” said Michael Yin, MD of Columbia University Medical Center in New York and lead author of the study. “Although numbers of HIV-infected postmenopausal women are increasing and postmenopausal women are at highest risk for osteoporotic fractures, few studies have evaluated skeletal status in this group. We hypothesized that postmenopausal women might be particularly vulnerable to the adverse effects of HIV infection or ART on the skeleton and our results indicate that this may indeed be the case.”

To test their hypothesis, Yin and his colleagues initiated a longitudinal study to assess bone health in 92 HIV-positive and 95 HIV-negative postmenopausal women. Bone mineral density of the lumbar spine, femoral neck and hip as well as body composition were measured by dual x-ray absorptiometry (DXA). Researchers found that HIV-positive postmenopausal women had lower bone mineral density at both the spine and hip than HIV-negative postmenopausal women.

“HIV infection was independently associated with lower bone mineral density after adjusting for body mass index (BMI) and traditional osteoporosis risk factors,” said Yin. “While the reason for HIV-associated bone loss remains unclear, it may be related to increased levels of cytokines (proteins produced by cells that aid communication between cells), direct effects of antiretrovirals on bone cells or hormonal/nutritional deficiencies that are common in HIV.”

“Estrogen protects against the effect of cytokines on bone resorption,” said Yin. “Therefore, as HIV-positive women become estrogen deficient during menopause, they may be at higher risk for accelerated bone loss and fracture.”

Other researchers working on the study include Don McMahon, Chiyuan Zhang, Aimee Shu, Ronald Staron, Ivelisse Colon, Jay Dobkin, Scott Hammer and Elizabeth Shane of Columbia University Medical Center in New York, N.Y.; David Ferris of Bronx-Lebanon Hospital Center in N.Y.; and Jeffrey Laurence of Weill Cornell Medical College in New York, N.Y.

The article, “Low bone mass and high bone turnover in postmenopausal HIV-infected women,” will appear in the February 2010 issue of JCEM.


0 Responses to “HIV-Infected Postmenopausal Women at High Risk for Bone Fractures”



  1. Leave a Comment

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


Follow Danny on Twitter!!

Prevention Education Stats

  • 4,973 hits

Follow

Get every new post delivered to your Inbox.

%d bloggers like this: