Week in Review: July 21–25

Blood-based Alzheimer’s diagnostics; CRISPR cuts out HIV; Leishmania and the sand fly microbiome; deconstructing the lionfish science fair debacle

Written byTracy Vence
| 3 min read

Register for free to listen to this article
Listen with Speechify
0:00
3:00
Share

FLICKR, US NAVYWhen Popular Science announced it was pulling its commenting system, few could argue with the staff’s impulse to reduce the negative impacts of inappropriate dialogue that detracts from scientific conversation. We at The Scientist have had a number of just-plain-awful comments posted to our site, too. But comments like this one (wctopp, July 23), on our report on two separate teams working to identify blood-based biomarkers for Alzheimer’s disease, remind us of the good that article comments can bring. Reader wctopp’s suggestion—that the groups partner up—has inspired a potential collaboration between Simon Lovestone of King’s College London and University of Oxford and Howard Federoff of the Georgetown University Medical Center. On Twitter, the researchers have expressed interest in working together to combine the two approaches to improve their ability to predict the onset of dementia.

WIKIMEDIA, C. GOLDSMITHTemple University’s Kamel Khalili and colleagues have used the CRISPR/Cas9 genome-editing technique to successfully remove latent HIV from the host genome in human cell lines. The team’s work was published in PNAS this week (July 21).

“It was a little bit . . . mind-boggling how this system really can identify a single copy of the virus in a chromosome, which is highly packed DNA, and exactly cleave that region,” said Khalili.

Daniel Stone, a staff scientist at the Fred Hutchinson Cancer Research Center in Seattle, Washington, noted that “the approach has promise.” However, he added, “the next question is, how do you deliver this?”

ROD DILLONThe sand fly gut microbiome can affect the insect’s capacity for carrying Leishmania, the agent of the skin-ulcer-causing disease in humans, Rod Dillon and colleagues from Lancaster University have shown. Their work was published in Parasites & Vectors this week (July 23).

“[The researchers] show that if they ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member? Login Here
February 2026

A Stubborn Gene, a Failed Experiment, and a New Path

When experiments refuse to cooperate, you try again and again. For Rafael Najmanovich, the setbacks ultimately pushed him in a new direction.

View this Issue
Human-Relevant In Vitro Models Enable Predictive Drug Discovery

Advancing Drug Discovery with Complex Human In Vitro Models

Stemcell Technologies
Redefining Immunology Through Advanced Technologies

Redefining Immunology Through Advanced Technologies

Ensuring Regulatory Compliance in AAV Manufacturing with Analytical Ultracentrifugation

Ensuring Regulatory Compliance in AAV Manufacturing with Analytical Ultracentrifugation

Beckman Coulter Logo
Conceptual multicolored vector image of cancer research, depicting various biomedical approaches to cancer therapy

Maximizing Cancer Research Model Systems

bioxcell

Products

Sino Biological Logo

Sino Biological Pioneers Life Sciences Innovation with High-Quality Bioreagents on Inside Business Today with Bill and Guiliana Rancic

Sino Biological Logo

Sino Biological Expands Research Reagent Portfolio to Support Global Nipah Virus Vaccine and Diagnostic Development

Beckman Coulter

Beckman Coulter Life Sciences Partners with Automata to Accelerate AI-Ready Laboratory Automation

Refeyn logo

Refeyn named in the Sunday Times 100 Tech list of the UK’s fastest-growing technology companies