Friday 29 December 2017

DRUG DISCOVERY METHODS FOR CHRONIC LYME DISEASE

“Our goal is to find alternatives to antibiotics to treat Lyme disease, which is caused by the Borrelia burgdorferi bacterium, and illnesses that arise from the Bartonella pathogen,” said Neil Spector, M.D., the Sandra Coates Associate Professor Breast Cancer Research at Duke Cancer Institute and the study’s co-principal investigator.
“We’re hoping to move from isolating targets to identifying potential drugs to testing in animal models within three years – so a very aggressive timeline,” said Spector, who was a Lyme patient himself and nearly died from complications of disease. “Our goal is to identify drugs that will target the Achilles’ heel of these pathogens while sparing the normal gut microbiome.”

Lyme Study Uses Drug Discovery Methods That Have Fueled Cancer Breakthroughs

Labs at Duke and other academic centers collaborate to identify alternatives to antibiotics



CHRONIC PERSISTENT LYME DISEASE IN NON HUMAN PRIMATES

Two important new studies :-

Variable manifestations, diverse seroreactivity and post-treatment persistence in non-human primates exposed to Borrelia burgdorferi by tick feeding


Abstract

The efficacy and accepted regimen of antibiotic treatment for Lyme disease has been a point of significant contention among physicians and patients. While experimental studies in animals have offered evidence of post-treatment persistence of Borrelia burgdorferi, variations in methodology, detection methods and limitations of the models have led to some uncertainty with respect to translation of these results to human infection. With all stages of clinical Lyme disease having previously been described in nonhuman primates, this animal model was selected in order to most closely mimic human infection and response to treatment. Rhesus macaques were inoculated with Bburgdorferi by tick bite and a portion were treated with recommended doses of doxycycline for 28 days at four months post-inoculation. Signs of infection, clinical pathology, and antibody responses to a set of five antigens were monitored throughout the ~1.2 year study. Persistence of Bburgdorferi was evaluated using xenodiagnosis, bioassays in mice, multiple methods of molecular detection, immunostaining with polyclonal and monoclonal antibodies and an in vivo culture system. Our results demonstrate host-dependent signs of infection and variation in antibody responses. In addition, we observed evidence of persistent, intact, metabolically-active Bburgdorferi after antibiotic treatment of disseminated infection and showed that persistence may not be reflected by maintenance of specific antibody production by the host.


Late Disseminated Lyme Disease: Associated Pathology and Spirochete Persistence Post-Treatment in Rhesus Macaques


Abstract

Non-human primates currently serve as the best experimental model for Lyme disease due to their close genetic homology with humans and demonstration of all three phases of disease following infection with Borreliella (Borrelia) burgdorferi (Bb). We investigated the pathology associated with late disseminated Lyme disease (12 to 13 months following tick inoculation) in doxycycline-treated (28 days; 5mg/kg, oral, 2x/day) and untreated rhesus macaques (Rm). Minimal to moderate lymphoplasmacytic inflammation, with a predilection for perivascular spaces and collagenous tissues, was observed in multiple tissues including the cerebral leptomeninges, brainstem, peripheral nerves from both fore and hind limbs, stifle synovium and perisynovial adipose tissue, urinary bladder, skeletal muscle, myocardium, and visceral pericardium. Indirect immunofluorescence assays (IFA) combining monoclonal (outer surface protein A) and polyclonal antibodies were performed on all tissue sections containing inflammation. Rare morphologically intact spirochetes were observed in the brains of two treated Rm, the heart of one treated Rm, and adjacent to a peripheral nerve of an untreated animal. Borreliaantigen staining of probable spirochete cross-sections was also observed in heart, skeletal muscle, and near peripheral nerves of both treated and untreated animals. These findings support the notion that chronic Lyme disease symptoms can be attributable to residual inflammation in and around tissues that harbor a low burden of persistent host-adapted spirochetes and/or residual antigen. 

Various reports of this study give details - 
Tulane University announcement -

Study finds Lyme bacteria can survive antibiotic treatment months after infection

Outbreak news Today -

Lyme disease: Borrelia burgdorferi survive 28-day course of antibiotics months after infection, according to study


Lyme Disease.org 

 New study finds Lyme bacteria survive a 28-day course of antibiotics



An excellent in depth look can also be found here- http://counsellingme.com/VIRAS/Embers.html








LAWSUIT FOR LYME DISEASE

'A lawsuit asserts that the design and implementation of Lyme disease care–as outlined in the treatment guidelines of the Infectious Diseases Society of America—is rooted in corruption.' 

Mary Beth Pfeiffer is an investigative journalist and writes for the Huffington Post her recent article - 10 points about suing the architects of Lyme policy - as a task force meets to review it.


To read the full article go to this link -
 https://www.huffingtonpost.com/entry/10-points-about-suing-the-architects-of-lyme-policy_us_5a2764bbe4b0650db4d40bb5