Hellen C. Greenblatt's Avatar

Hellen C. Greenblatt

@hellengreenblat.bsky.social

#Homeostasis is essential. Interests in #gut-#brain-#immune axis. #Microbiome. Balance and limit #inflammation → ↑ QOL.

729 Followers  |  2,219 Following  |  104 Posts  |  Joined: 14.11.2024  |  1.7171

Latest posts by hellengreenblat.bsky.social on Bluesky

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Key Role of Pro230 in the Hinge Region on the Architecture and Function of IgG1 Immunoglobulin G (IgG) is a multifunctional glycoprotein essential for immune defense and widely used as a therapeutic due to its antigen specificity and effector functions. However, the inherent flex...

Deleting a single amino acid in #IgG lower hinge alter sits assembly and immune signaling, e.g. impair interactions with #Fcγ receptors. bit.ly/4rsdrJo [open access]

30.01.2026 17:19 — 👍 1    🔁 0    💬 0    📌 0
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A type I interferon-mitochondrial axis regulates efferocytosis and interferon-stimulated gene induction in macrophages Cytosolic nucleic acid sensors contribute to pathogenic and autoinflammatory inflammation; however, little is known about the metabolic adaptations that they induce. Dunphy et al. find that these path...

Virus →#IFN-1→ ISG15. ↆ #mitochondrial membrane potential → ↑ mitochondrial fragmentation. ↆ inflammatory gene expression→ ↆ #inflammation and ↑ clearance of tissue damage. bit.ly/4qNGCq3 [open access].

29.01.2026 21:54 — 👍 2    🔁 0    💬 0    📌 0

#Exercise ↑ FOXO [#longevity’ genes and #anti-inflammatory] →ↆ #DEAF1. ↆ DEAF1 → muscle cells regain their ability to recycle damaged parts and stay healthy. Exercise helps restore homeostasis within muscle cells and keeps muscles stronger for longer. bit.ly/49PVRaU

25.01.2026 21:52 — 👍 0    🔁 0    💬 0    📌 0
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Inflammatory Factors and Chronic Rhinosinusitis: An Umbrella Review Chronic rhinosinusitis (CRS) is a common inflammatory disorder of the nasal mucosa and paranasal sinuses characterized by persistent sinonasal symptoms and objective endoscopic and imaging evidence of...

Three immune-inflammatory patterns differ: in sequence of the inflammatory mediators, the immune cell populations involved, and the associated physiologic functions in #rhinosinusitis. bit.ly/4b3Igiv [open access].

20.01.2026 01:40 — 👍 1    🔁 0    💬 0    📌 0
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Inflammation PET and plasma neurofilament light predict survival in people with progressive supranuclear palsy Shapiro et al. report that inflammation PET signals in subcortical regions and plasma neurofilament light levels are complementary prognostic biomarkers in

Progressive supranuclear palsy (#PSP) → atrophy and #inflammation of the brainstem, the basal #ganglia and, to a lesser degree, the #cortex. ↑ subcortical neuroinflammation→ assoc. with shorter survivals. bit.ly/4qj4hyr [open access]

14.01.2026 18:23 — 👍 2    🔁 0    💬 0    📌 0
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The Gut Microbiome at the Onset of Inflammatory Bowel Disease: A Systematic Review and Unified Bioinformatic Synthesis Gut bacteria are important in causing inflammatory bowel diseases. By combining the results from published studies we have identified the key changes in these bacteria that might help us develop new d...

ↆ anaerobes and ↑ of oxygen-tolerant, orally associated #gut #microbiome signatures in treatment-naïve new-onset #IBD. Migration of bacteria from the mouth to the gut may play a key role in triggering #inflammation. bit.ly/49tcRU1 bit.ly/4puJkPW

09.01.2026 19:36 — 👍 6    🔁 1    💬 0    📌 0

Progressive #MS →hallmark of grey matter injury = compartmentalized #inflammation (CI) of the #leptomeninges. In vivo, 800x ↑ #CXCL13 + significantly ↆ BAFF assoc. w CI . Ratios → grey matter injury.bit.ly/4q0kxUZ go.nature.com/3Yk0AfL

04.01.2026 19:42 — 👍 0    🔁 0    💬 0    📌 0
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Neurobehavioural links from infant screen time to anxiety Higher infant screen time is linked to accelerated topological maturation of the visual and cognitive control networks, leading to prolonged decision latency and increased adolescent anxiety. Sensory ...

#Infancy particularly sensitive period for #screen exposure. Exposure <2 yrs → ↑#brain maturation, ↆ decision-making, and ↑ anxiety by #adolescence. Shared reading 3yrs ↆ the brain- alterations suggesting a protective effect. bit.ly/3MZXdZ2 [open access]

31.12.2025 22:34 — 👍 3    🔁 0    💬 0    📌 0
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P1223 Maternal dietary patterns during pregnancy and offspring’s risk of paediatric Inflammatory Bowel Disease - a cohort study AbstractBackground. The association between maternal dietary patterns during pregnancy and offspring’s risk of paediatric-onset inflammatory bowel disease

Diverse diet during #pregnancy= ↑ meat, fish, vegetables, legumes, fruits, potatoes→ ↆ risk of #IBD vs Western-style diet. bit.ly/4aCM2z5 go.nature.com/49cY8fP

29.12.2025 17:20 — 👍 2    🔁 0    💬 0    📌 0
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Inflammation in areas of fibrosis precedes loss of kidney function in lupus nephritis Background Interstitial fibrosis in lupus nephritis (LN) is often infiltrated by immune cells but typically regarded as non-specific ‘scar reaction’. This study aimed to investigate the relationship b...

#Inflammation in areas of #fibrosis precedes loss of kidney function in #lupus nephritis bit.ly/4pFLT2q [open access]

16.12.2025 18:11 — 👍 2    🔁 0    💬 0    📌 0
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Long COVID involves activation of proinflammatory and immune exhaustion pathways - Nature Immunology Long COVID (LC) involves a spectrum of chronic symptoms after resolution of acute severe acute respiratory syndrome coronavirus 2 infection. Barouch and colleagues show that LC is characterized by per...

Long #COVID (n=142)→ persistent activation of chronic #inflammation. Including proinflammatory #cytokine signaling, #complement activation, #metabolic dysregulation and immune #exhaustion. Suggestion of link between metabolic dysregulation and inflammation. go.nature.com/48UfU7B
[open access].

15.12.2025 00:01 — 👍 8    🔁 2    💬 0    📌 0
The neural basis of endogenous reinforcement learning.

The neural basis of endogenous reinforcement learning.

Vividly imagining a positive interaction with someone can increase how much you like them — and alter how your brain stores information about that person. (Similar to those seen when people learn from real rewarding experiences.) bit.ly/4ac9dAe go.nature.com/48SDuS9 [open access]

11.12.2025 16:58 — 👍 5    🔁 2    💬 0    📌 0
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Sex Differences in the Relationship Between Psychosocial Stress and Myocardial Tissue Characteristics: A CMR Imaging Study | Circulation: Cardiovascular Imaging BACKGROUND: Psychosocial stress is linked to the development of cardiovascular disease, with a more pronounced impact in female participants. This study investigates sex differences in the association...

#Women w psychosocial stress, e.g., #caregiving and lack of emotional support→ early heart tissue changes assoc. w #CVD. MRI scans →signs of #inflammation. Not observed in males. bit.ly/4pQUzCJ bit.ly/4iKH9Wz

08.12.2025 18:53 — 👍 4    🔁 0    💬 0    📌 0
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Adipocytes orchestrate obesity-related chronic inflammation through β2-microglobulin - Signal Transduction and Targeted Therapy Signal Transduction and Targeted Therapy - Adipocytes orchestrate obesity-related chronic inflammation through β2-microglobulin

#Adipocytes → #obesity-associated chronic #inflammation and metabolic disorders via two @#β2-microglobulin-dependent mechanisms. bit.ly/4poJMA9 [open access]

07.12.2025 15:32 — 👍 4    🔁 0    💬 0    📌 0
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Adipose immune microenvironment: catalyst of age-related adipose tissue dysfunction - Immunity & Ageing Aging has profound effects on whole-body homeostasis. With age, adipose tissue undergoes marked alterations in immune microenvironment and distribution as well as a loss of immune and metabolic capaci...

#Age-related #inflammation disrupts #adipose tissue #homeostasis, interferes with its metabolic functions, → age-related diseases. bit.ly/4obug9a [open access

23.11.2025 16:29 — 👍 5    🔁 0    💬 0    📌 0
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Resveratrol–Copper Combination Suppresses Glioblastoma Growth and Restores Immune Function A small but powerful clinical trial reveals that resveratrol and copper can reduce tumor growth, restore immune function, and clear harmful DNA fragments in glioblastoma—without adverse effects.

Oral administration of #resveratrol and #copper may have a profound effect on the aggressive phenotype of #glioblastoma. [5.6 mg of resveratrol and 560 ng of Cu 4x/day for an average of 11.6 days]. How about other neoplasms? bit.ly/49tSXtQ go.nature.com/4oPpuQ1 [open access]

19.11.2025 16:43 — 👍 2    🔁 0    💬 0    📌 0
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Systematic profiling reveals betaine as an exercise mimetic for geroprotection Elucidating the multi-faceted health effects of exercise in humans identifies kidney-derived betaine as an exercise mimetic acting as a TBK1 inhibitor with anti-inflammatory and geroprotective activit...

#Exercise→#betaine→#inflammation, muscles, heart, genes, proteins shift over weeks, not minutes. ↑ betaine →ↆ inflammation, cellular #aging ↆ, ↑ energy expenditure, ↑ gut bacteria→ ↑ immune strength and antioxidant activity. bit.ly/446OZUp bit.ly/47LKoJL

16.11.2025 18:24 — 👍 2    🔁 0    💬 0    📌 0
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Multi-omic profiling reveals age-related immune dynamics in healthy adults - Nature This multi-omic longitudinal analysis of the healthy&nbsp;human peripheral immune system constructs the Human Immune Health Atlas and&nbsp;assembles data on immune cell composition and state changes w...

Immune #ageing dynamic, non-linear process shaped by both intrinsic and extrinsic factors. Peripheral immune cell subsets change with age → immune responsiveness independently of overt systemic #inflammation or underlying chronic #CMV infection. go.nature.com/3JLQYXf [open access]

07.11.2025 19:43 — 👍 1    🔁 0    💬 0    📌 0
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The influence of structured physical activity on vaccination response from adults to older individuals: a systematic review on the Immunoinflammatory crosstalk of COVID-19 - Immunity & Ageing Background Amidst the ongoing COVID-19 pandemic, understanding factors that influence vaccine efficacy is crucial, particularly in older adults. Regular physical exercise and/or structured physical ac...

Moderate to high-intensity #exercise (50–70% of maximum heart rate for aerobic exercise and 60–80% of 1RM for resistance training), performed 3–5 times per week, ↑ immune responses to #COVID-19 vaccination, particularly by ↆ chronic low-grade #inflammation. bit.ly/4qGhAJT

06.11.2025 21:19 — 👍 0    🔁 0    💬 0    📌 0
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Frontiers | Cytokines in sepsis: a critical review of the literature on systemic inflammation and multiple organ dysfunction Sepsis constitutes a profoundly heterogeneous and dynamic clinical syndrome, precipitated by a maladaptive host response to infection in which the immune sys...

#Cytokines in #sepsis, a review. Sepsis → maladaptive host response to infection. Interplay between proinflammatory and anti-inflammatory pathways pathologically skewed. Central role of cytokine storms in activating and regulating the systemic #inflammatory cascade. bit.ly/4qR2TUD

05.11.2025 16:34 — 👍 0    🔁 0    💬 0    📌 0
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Immune-mediated interactions between sarcopenia and atherosclerosis in aging - Immunity & Ageing Sarcopenia and atherosclerosis are prevalent age-related conditions increasingly recognized as interconnected through shared immune-mediated pathways. This review elucidates how “inflammaging” driven ...

Circulating levels of IL-6 and TNF-α reflect systemic #inflammation and link muscle #wasting and #vascular degeneration. HsCRP, a validated cardiovascular risk marker downstream of IL-6, is correlated with #sarcopenia progression. bit.ly/47OelbY

30.10.2025 15:41 — 👍 1    🔁 0    💬 0    📌 0
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SMOKING TRIGGERS DISTINCT INFLAMMATORY MECHANISMS IN HEALTHY INDIVIDUALS AND PRIMARY LUNG CANCER PATIENTS. The specific contribution of smoking to oxidative stress (OS) and systemic inflammation in lung cancer (LC) patients, as well as the potential synergi…

Smoking → oxidative damage and #inflammation→ lung #cancer development by generating reactive DNA species and fostering oncogenic processes. (Modest sample size.) bit.ly/3L8mYW5

28.10.2025 18:21 — 👍 0    🔁 0    💬 0    📌 0
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Mitochondrial and lysosomal signaling orchestrates heterogeneous metabolic states of regulatory T cells Mitochondrial and lysosomal signaling orchestrates Treg cell metabolic states and functional fitness.

A tale of two organelles: #Mitochondria and #lysosomes
Activated cell states → ↑ mitochondria vs. resting cell states. These mitochondria have more dense cristae, suggesting they are an important part of regulatory T cell activation during #inflammation. bit.ly/4qLclsH bit.ly/3LdvLWx

27.10.2025 19:27 — 👍 3    🔁 1    💬 0    📌 0
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Frontiers | Editorial: The role of inflammation in organ injury Inflammation represents one of the most fundamental and evolutionarily conserved biological responses for host defense against pathogens and tissue injury (1...

Analysis of IL-17A in multisystem #inflammatory syndrome → insights into pediatric #inflammatory responses following SARS-CoV-2 exposure. IL-17A may be not only as mechanistic player but also a valuable prognostic marker. Editorial bit.ly/4qn6rxn

22.10.2025 15:09 — 👍 1    🔁 0    💬 0    📌 0
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Scientists discover how cells protect the skin from inflammatory disease—paving the way for new treatments Researchers at VIB and Ghent University have uncovered a key mechanism that protects the skin from harmful inflammation. The findings, published in Immunity, could open new avenues for treating chroni...

#ATG9A →helps cells clean up internal waste (#autophagy). Crucial for preventing excessive #inflammation. #TNF→abnormal IFN response→↑ZBP1→skin damage. bit.ly/47jbupQ bit.ly/48HNuPI

21.10.2025 18:40 — 👍 1    🔁 0    💬 0    📌 0
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Increasing levels of the protein PI31 demonstrates neuroprotective effects in mice - News One fundamental feature of neurodegenerative diseases is a breakdown in communication. Even before brain cells die, the delicate machinery that keeps neurons in touch—by clearing away protein waste at...

Eliminate unwanted proteins at synapse = ↆ synaptic dysfunction? “…boosting levels of ...protein PI31 can prevent neuronal #degeneration, restore #synaptic function, and significantly extend lifespan ...of rare genetic disorders similar to #Parkinson’s. “ bit.ly/4hlmrvJ bit.ly/3L7pxaJ

20.10.2025 19:48 — 👍 1    🔁 0    💬 0    📌 0
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In vivo, maternal Ig ↆ oral #rotavirus vaccine immunogenicity by ↑ vaccine clearance, thereby ↆ protection. Note: in mice, MatAb interference is mediated by milk-derived antibodies. In humans, transplacental versus breast milk antibodies likely depends on the vaccine platform. bit.ly/3L8thbU

14.10.2025 18:05 — 👍 2    🔁 0    💬 0    📌 0
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The impacts of chronic infections on shaping cellular senescence - Immunity & Ageing Cellular senescence is a fundamental biological process characterized by stable cell cycle arrest, genomic instability, and the acquisition of a proinflammatory secretory phenotype. While senescence is traditionally associated with aging, growing evidence reveals that chronic infections such as viral, bacterial, and protozoan parasites can serve as powerful inducers of senescence, contributing to premature aging and long-term tissue damage. This review explores the diverse mechanisms by which persistent pathogens trigger or sustain senescence in host cells. We highlight how these chronic infections manipulate host DNA repair, mitochondrial dynamics, telomere maintenance, oxidative stress, and immune function to promote senescence and immunosenescence. Emerging findings also reveal how pathogens hijack the host cellular machinery to induce senescence across various tissue types. In many cases, senescence not only enables pathogen persistence but also drives pathological outcomes such as fibrosis, neurodegeneration, cardiomyopathy, and immune exhaustion. Collectively, this emerging evidence highlights a unifying strategy among diverse pathogens: the exploitation of cellular senescence to support chronic infection and promote disease. Understanding how infectious agents drive senescence offers new insights into age-related pathologies and highlights potential therapeutic targets, such as senolytic and senomorphic agents, to mitigate the long-term impacts of chronic infections.

Cellular #senescence→ genomic instability, #inflammatory phenotype and #pathogen persistence→ disease (e.g. fibrosis, neurodegeneration, cardiomyopathy, and immune exhaustion). Review: bit.ly/4q7b0vN

12.10.2025 20:06 — 👍 3    🔁 0    💬 0    📌 0
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Targeting immunosenesence promotes clearance of senescent cells - Immunity & Ageing Known as immunosenescence, the major dysregulation of the immune system with age is associated with poor vaccination efficacy, and increased susceptibility to infections, age-related pathologies, and neoplasms, with incidences exacerbated with age. Cellular senescence is a crucial process that puts cells in an irreversible cell-cycle arrest which prevents damaged or stressed cells from uncontrolled propagation and eventually potential malignancy. Paradoxically, senescence also contributes to the occurrence of cancer and increases the risk of metastasis through different secretory mediators. Altogether, the recent use of senotherapy to eliminate senescent cells has been shown to delay tumorigenesis, attenuate age-related deterioration of organs, and promote healthy aging. Interestingly, immune cells have been shown to specifically interact with, and kill senescent cells, thus opening new opportunities for the development of specific therapeutic strategies similar to immunotherapy in cancer. Through its detrimental impact on the immune system, immunosenescence is also leading to the accumulation of senescent cells with age thus further contributing to the occurrence and worsening of multiple age-related pathologies such as cancer. Understanding the molecular and cellular events occurring during the aging process, and triggering immunosenescence as well as the mechanisms by which senescent cells escape immune surveillance would help to improve immune responses to senescent cells and their clearance. In this review, we highlight how senescent cells interact with immune cells, and how immunosenescence-associated phenotypical and functional deregulation hinder the ability of immune cells to clear senescent cells. We further characterize strategies aimed at promoting the clearance of senescent cells by the immune system.

Chronic #SASP production→ ↑ #inflammation. Accumulation of #senescent cells→ ↑ cancer and other age-associated pathologies. Targeting and clearance of senescent cells ↆ pathologies. bit.ly/46Sbu1r

08.10.2025 19:20 — 👍 2    🔁 0    💬 0    📌 0
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Frontiers | Immunoglobulin: unraveling its complex web in aging Aging is a complex biological phenomenon, which involved in a large number of diseases such as cancer, neurodegeneration, and cardiovascular diseases. Unders...

#Aging can regulate the production and function of #immunoglobulins, through immunosenescence, chronic #inflammation, #epigenetic modification, and microbe disturbances. bit.ly/46Dv6Gn

06.10.2025 01:20 — 👍 1    🔁 0    💬 0    📌 0

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