Lifeboat Foundation

How do our bodies know what to become?

There are no instructions in our genes that code for the exact 3D structure of our bodies. There’s no tiny human contained in our DNA. So, what powers the transformation of the first cell in the embryo to a full-blown organism?

Continue reading “#14 Michael Levin — Our Body is a Collection of Intelligent Organisms” »

Gate’s team of scientists observed genetic changes in the CSF immune cells in older healthy individuals that made the cells appear more activated and inflamed with advanced age.

“The immune cells appear to be a little angry in older individuals,” Gate said. “We think this anger might make these cells less functional, resulting in dysregulation of the brain’s immune system.”

In the cognitively impaired group, inflamed T-cells cloned themselves and flowed into the CSF and brain as if they were following a radio signal, Gate said. Scientists found the cells had an overabundance of a cell receptor — CXCR6 — that acts as an antenna. This receptor receives a signal — CXCL16 — from the degenerating brain’s microglia cells to enter the brain.

Fluid intelligence refers to the ability to solve challenging novel problems when prior learning or accumulated experience are of limited use. ¹ Fluid intelligence ranks amongst the most important features of cognition, correlates with many cognitive abilities (e.g. memory), ² and predicts educational and professional success, ³ social mobility, ⁴ health ⁵ and longevity. ⁶ It is thought to be a key mental capacity involved in ‘active thinking’, ⁷ fluid intelligence declines dramatically in various types of dementia ⁸ and reflects the degree of executive impairment in older patients with frontal involvement. ⁹ Despite the importance of fluid intelligence in defining human behaviour, it remains contentious whether this is a single or a cluster of cognitive abilities and the nature of its relationship with the brain. ¹⁰

Fluid intelligence is traditionally measured with tests of novel problem-solving with non-verbal material that minimize dependence on prior knowledge. Such tests are known to have strong fluid intelligence correlations in large-scale factor analyses. ^{11, 12} Raven’s Advanced Progressive Matrices ¹³ (APM), a test widely adopted in clinical practice and research, ¹⁴ contains multiple choice visual analogy problems of increasing difficulty. Each problem presents an incomplete matrix of geometric figures with a multiple choice of options for the missing figure. Less commonly, verbal tests of fluid intelligence such as Part 1 of the Alice Heim 4 (AH4-1) ¹⁵ are adopted. The Wechsler Adult Intelligence Scale (WAIS) ¹⁶ has also been used to estimate fluid intelligence by averaging performance on a diverse range of subtests. However, several subtests (e.g. vocabulary) emphasize knowledge, disproportionately weighting measures of ‘crystallized’ intelligence, ^{17, 18} whilst others (e.g. picture completion) have rather low fluid intelligence correlations. ¹⁹ Hence, it has been argued that tests such as the APM are the most suitable for a theoretically-based investigation of changes in fluid intelligence after brain injury. ^{20, 21}

Proposals regarding the neural substrates of fluid intelligence have suggested close links with frontal and parietal functions. For example, Duncan and colleagues ²² have argued that a network of mainly frontal and parietal areas, termed the ‘multiple-demand network’ (MD), is ‘the seat’ of fluid intelligence. The highly influential parieto-frontal integration theory (P-FIT), based largely on neuroimaging studies of healthy subjects, posits that structural symbolism and abstraction emerge from sensory inputs to parietal cortex, with hypothesis generation and problem solving arising from interactions with frontal cortex. Once the best solution is identified, the anterior cingulate is engaged in response selection and inhibition of alternatives. ^{23, 24} Despite its name, P-FIT also posits occipital and temporal involvement, implying widely distributed substrates of fluid intelligence.

The last year in architecture will be remembered as one of firsts, from the world’s first “upcycled” skyscraper winning World Building of the Year to Burkina Faso-born Francis Kéré becoming the first African architect to win the coveted Pritzker Prize.

It was also a year in which we lost industry giants like Ricardo Bofill and Meinhard von Gerkan, while gaining long-awaited new landmarks like the Taipei Performing Arts Center and New York’s Steinway Tower.

With construction projects often taking years to complete, delays caused by Covid-19 are still being felt. But 2023 nonetheless promises to be a year of remarkable new openings, whether it’s the world’s second-tallest tower or an interfaith religious complex in Abu Dhabi.

The devastating 2014–2016 Ebola epidemic in West Africa prompted changes in the way the world responds to outbreaks and other health emergencies. Here are eight things that are being done differently in the response to the Ebola outbreak in the Democratic Republic of the Congo (DRC).

In a recent study published in Cell, researchers used a multi-omics approach to profile the gut microbiomes and metabolomes of mothers and infants to determine the vertical and horizontal transmission of bacterial species and strains as well as individual genes and understand the dynamics of the gut microbiome assembly that shape the development of the infant before and after birth.

The vertical transmission of gut bacteria from mother to fetus during pregnancy and the horizontal transfer of microbes through breast milk plays a vital role in the physical and cognitive development of the infant long after birth. Studies have shown associations between the gut microbiota composition of breastmilk and the development of the infant’s immune system, as well as autoimmune conditions and allergies. Furthermore, allergies and autoimmune disorders have also been linked to exogenous proteins in infant formula.

Metabolites produced by gut microbiota are also associated with the infant’s cognitive development. However, the development of gut microbiomes and metabolomes in the perinatal stage and their role in infant development remains unclear.

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Want to donate with cryptocurrency? Lifespan.io is proud to announce the official launch of the Longevity Cause Fund in partnership with Sens Research Foundation and the Methuselah Foundation, facilitated by Angel Protocol.

Continue reading “Lifespan.io End of Year 2022 Fundraiser” »

//Although lipomatosis is very common and increases with age, scientists have previously devoted little discussion and research to it. Scientists at Uppsala University have just published a study that offers significant insights into the causes of human lymph node function decline with aging and the effects on immune system performance.

Scientists carefully examined more than 200 lymph nodes to show that lipomatosis starts in the medulla, which is the center of the lymph node. They also provided evidence connecting lipomatosis to converting lymph node supporting cells (fibroblasts) into adipocytes (fat cells). They also demonstrate that fibroblast subtypes in the medulla are more likely to develop into adipocytes.\.

The study is a first step toward understanding why lipomatosis occur.

The Internet and COVID pandemic combined have driven both online gaming and gambling development for the good and the bad.