Biological Connections Research Articles

Integrating alpha, beta, and phylogenetic diversity to understand anuran fauna along environmental gradients of tropical forests in western Ecuador.

The study of current distribution patterns of amphibian species in South America is of particular interest in areas such as evolutionary ecology and conservation biology. These patterns could be playing an important role in biological interactions, population size, and connectivity, and potential extinction risk in amphibians. Here, we tested the effects of spatial and environmental factors on the variation, turnover, and phylogenetic diversity of anuran amphibian species in tropical forests of western Ecuador. Data for presence/absence of 101 species of 34 genera and 10 families registered in 12 sites (nested in four biogeographic units) were obtained through fieldwork, museum collections, and literature records. We examined the influence of geographical, altitudinal, temperature, and precipitation distances on differences in anuran composition between sites. We found significant positive correlations among all of these variables with anuran distribution. The greatest alpha diversity (species richness) was found in the Equatorial Chocó biogeographic unit. Equatorial Pacific biogeographic unit could act as a transition zone between the Equatorial Chocó and Equatorial Tumbes. The western Andes (Western Cordillera biogeographic unit) was the most dissimilar and exhibited a higher species turnover rate than the other biogeographic units. Our results suggest that precipitation and elevation play a key role in maintaining the diversity of amphibian species in western Ecuador.

MiR-200a-3p modulates gene expression in comorbid pain and depression: Molecular implication for central sensitization

Chronic pain and depression are often comorbid exhibiting common clinical presentations and biological connections related to central nervous system sensitization. Epigenetic regulation of gene expression in the brain plays a crucial role in response to long-lasting stress and chronic pain, and microRNA imbalance in the prefrontal cortex (PFC) might be involved in central sensitization. Male Sprague Dawley rats were subjected to unpredictable chronic mild stress (UCMS) and spared nerve injury (SNI) to initiate depressive-like behavior and chronic pain behavior, respectively. The next-generation sequencing technique was employed to analyze PFC microRNAs in both the UCMS and SNI models. Rats exposed to either UCMS or SNI exhibited both depressive-like and chronic pain behaviors. Five specific microRNAs (miR-10a-5p, miR-182, miR-200a-3p, miR-200b-3p, and miR-429) were simultaneously down-regulated in the depressive-like and chronic pain models after 4 weeks of short-term stress. Gene ontology revealed that the 4-week period of stress enhanced neurogenesis. Only the miR-200a-3p level was continuously elevated under prolonged stress, suggesting roles of reduced neurogenesis, inflammatory activation, disturbed circadian rhythm, lipid metabolism, and insulin secretion in the co-existence of pain and depression. Thus we conclude that miR-200a-3p might be a specific biomarker of central sensitization in chronic pain and depression.

The experiences of parents and caregiver(s) whose child received an organ from a living anonymous liver donor.

Anonymous living donor transplantation is a potential strategy to address the shortage of available organs for transplant. A living anonymous donor (LAD) is a donor with no biological connection and whose identity is unknown to the recipient. This study captured the lived experiences of pediatric liver transplant recipient families whose child received an organ from a LAD. Qualitative data collection and analysis were guided by a theoretical framework of phenomenology. Data analysis highlighted themes through an inductive process of reviewing transcript paragraphs to code for significant statements that represented key concepts and captured depth of experience. A total of nine interviews were conducted with 10 participants. Data analysis yielded themes of emotional turbulence through their transplant journey. Pre-transplant experiences were characterized by feelings of helplessness and desperation. Receiving a LAD transplant prompted shock, relief, and acceptance of the donation. Post-transplant experiences were characterized by altered life-perspectives and varied levels of connectedness to the donor, marked by gratitude and concern for donor well-being. Anonymous donation in liver transplantation is perceived by recipient families as a remarkable gift and a viable donor option. Our preliminary findings can be used to inform strategy development regarding future delivery of care.

Pre-Press Cancer narratives on social media as ‘small stories’

Cancer narratives shared on social media platforms have received increased academic interest over the last decade but often without sufficiently acknowledging the media specific narrative affordances of these platforms. The article will address this problem, by first presenting a ‘small stories’ approach to studying illness narrative on social media and then putting the approach to work in a case study of a Danish cancer patient’s Instagram profile (@jannelivsnyder66). The paper argues, that the storytelling practices on the profile can be analytically approached by focusing on the interplay between three co-constitutive levels of interaction: 1) a level of the desired illness narrative and position that the narrator, influenced by available cultural discourses and interaction with followers, hopes to be able to tell; 2) a level of sharing everyday posts, which can either support or disturb the desired narrative; 3) a level of follower responses, where relations between the desired narrative and singular posts are monitored through processes of liking and commenting. Followers of social media cancer narratives should in light of this not be understood as an audience witnessing an individual telling his/her “own” story, but rather as crucial contributors to the social interaction and co-creation of desired narratives, subject positions, narrative progress and tellability. In conclusion, the article thus stresses that cancer storytelling on social media, despite the strong biological connection of the disease to an individual body, emerges through inherently social processes of reading, liking, commenting, monitoring and co-deciding narrative practices.

Human gut microbiome changes during a 10 week Randomised Control Trial for micronutrient supplementation in children with attention deficit hyperactivity disorder

It has been widely hypothesized that both diet and the microbiome play a role in the regulation of attention-deficit/hyperactivity disorder (ADHD) behaviour. However, there has been very limited scientific investigation into the potential biological connection. We performed a 10-week pilot study investigating the effects of a broad spectrum micronutrient administration on faecal microbiome content, using 16S rRNA gene sequencing. The study consisted of 17 children (seven in the placebo and ten in the treatment group) between the ages of seven and 12 years, who were diagnosed with ADHD. We found that micronutrient treatment did not drive large-scale changes in composition or structure of the microbiome. However, observed OTUs significantly increased in the treatment group, and showed no mean change in the placebo group. The differential abundance and relative frequency of Actinobacteria significantly decreased post- micronutrient treatment, and this was largely attributed to species from the genus Bifidobacterium. This was compensated by an increase in the relative frequency of species from the genus Collinsella. Further research is required to establish the role that Bifidobacterium contribute towards neuropsychiatric disorders; however, these findings suggest that micronutrient administration could be used as a safe, therapeutic method to modulate Bifidobacterium abundance, which could have potential implications for modulating and regulating ADHD behaviour. Our pilot study provides an initial observation into this area of research, and highlights an interesting avenue for further investigation in a larger cohort. Furthermore, these novel results provide a basis for future research on the biological connection between ADHD, diet and the microbiome.

Donor outcomes in anonymous live liver donation

Death rates on liver transplant waiting lists range from 5%-25%. Herein, we report a unique experience with 50 anonymous individuals who volunteered to address this gap by offering to donate part of their liver to a recipient with whom they had no biological connection or prior relationship, so called anonymous live liver donation (A-LLD). Candidates were screened to confirm excellent physical, mental, social, and financial health. Demographics and surgical outcomes were analyzed. Qualitative interviews after donation examined motivation and experiences. Validated self-reported questionnaires assessed personality traits and psychological impact. A total of 50 A-LLD liver transplants were performed between 2005 and 2017. Most donors had a university education, a middle-class income, and a history of prior altruism. Half were women. Median age was 38.5 years (range 20-59). Thirty-three (70%) learned about this opportunity through public or social media. Saving a life, helping others, generativity, and reciprocity for past generosity were motivators. Social, financial, healthcare, and legal support in Canada were identified as facilitators. A-LLD identified most with the personality traits of agreeableness and conscientiousness. The median hospital stay was 6 days. One donor experienced a Dindo-Clavien Grade 3 complication that completely resolved. One-year recipient survival was 91% in 22 adults and 97% in 28 children. No A-LLD reported regretting their decision. This is the first and only report of the characteristics, motivations and facilitators of A-LLD in a large cohort. With rigorous protocols, outcomes are excellent. A-LLD has significant potential to reduce the gap between transplant organ demand and availability. We report a unique experience with 50 living donors who volunteered to donate to a recipient with whom they had no biological connection or prior relationship (anonymous living donors). This report is the first to discuss motivations, strategies and facilitators that may mitigate physical, social and ethical risk factors in this patient population. With rigorous protocols, anonymous liver donation and recipient outcomes are excellent; with appropriate clinical expertise and system facilitators in place, our experience suggests that other centers may consider the procedure for its significant potential to reduce the gap between transplant organ demand and availability.

Gompertz’ Hazard Law as a Network Principle of Aging

Background: Life-spanning population survivorship curves (the number of survivors versus age) are conventionally regarded as a demographic issue. Most often, the term hazard, the relative mortality per age-interval, is used as a typical survivorship parameter. Population survivorship curves are construed from cross-sectional data (single event per individual; here, mortality). Objective: We tested (quantitatively) how Gompertz’ law describes the mortality pattern of a wide variety of organisms, some of them fed with lifespan affecting diets. Moreover, we tested (semi-quantitatively) whether Gompertz’ law describes the disintegration of a (biological) small-world network. Methods: The Gompertz tests, explored in demographic data of humans (male/female) and 4 animal species (mice, honeybees, fruit flies, houseflies), were analyzed with conventional software. The Gompertz law was examined in a small-world network model. Results: Gompertz' law applies to all cohorts; thus, with or without exposure to experimental conditions. It describes in all cohorts old-age slowing of mortality. Gompertz’ law is compatible with a gradual and random increase of connections in the network model. Conclusion: Old-age deceleration of mortality is a characteristic of many populations. Aging has to be understood as a lifetime increasing of excitatory or, alternatively, of decreasing inhibitory (biological) connections, thereby facilitating pathogenic mechanisms.

Reactions from family of origin to the disclosure of lesbian motherhood via donor insemination

Most studies of planned lesbian motherhood via donor insemination (DI) have sampled lesbian mothers in individualistic societies where adults have relatively distant connection to their family of origin. Our study examined the experiences of biological and non-biological lesbian mothers in five families who had children through DI after disclosing their motherhood status to their family networks in Portugal, a familistic society. The first theme identified by thematic analysis—“But why do you want to have a child?”—encapsulated the reactions of biological mothers’ family of origin to the announcement of motherhood. Disclosure was mostly met by a shocked response in the family, rooted in the belief that lesbian women should not have children. The second theme—“But you weren’t pregnant, how is this your child?”—summarized the reactions of non-biological mothers’ family of origin to the disclosure of motherhood status as they considered refusing to recognize their grandchild in the absence of biological connection. Prejudice against lesbian-mother family formation was associated with the specific intersection of lesbianism and motherhood, but relationships between the mothers and their families were largely repaired because of familistic values.

Simultaneously inhibiting undecaprenyl phosphate production and peptidoglycan synthases promotes rapid lysis in Escherichia coli.

Peptidoglycan (PG) is a highly cross-linked polysaccharide that encases bacteria, resists the effects of turgor and confers cell shape. PG precursors are translocated across the cytoplasmic membrane by the lipid carrier undecaprenyl phosphate (Und-P) where they are incorporated into the PG superstructure. Previously, we found that one of our Escherichia coli laboratory strains (CS109) harbors a missense mutation in uppS, which encodes an enzymatically defective Und-P(P) synthase. Here, we show that CS109 cells lacking the bifunctional aPBP PBP1B (penicillin binding protein 1B) lyse during exponential growth at elevated temperature. PBP1B lysis was reversed by: (i) reintroducing wild-type uppS, (ii) increasing the availability of PG precursors or (iii) overproducing PBP1A, a related bifunctional PG synthase. In addition, inhibiting the catalytic activity of PBP2 or PBP3, two monofunctional bPBPs, caused CS109 cells to lyse. Limiting the precursors required for Und-P synthesis in MG1655, which harbors a wild-type allele of uppS, also promoted lysis in mutants lacking PBP1B or bPBP activity. Thus, simultaneous inhibition of Und-P production and PG synthases provokes a synergistic response that leads to cell lysis. These findings suggest a biological connection that could be exploited in combination therapies.

Framing fragmentation in strategic policy documents in spatial planning and environmental domains: differences and similarities

Fragmentation is a complex issue and the way it is framed will impact on policy decisions. The Czech Republic has adopted several strategic policy documents in spatial planning and environmental domains that address fragmentation. However, these documents differ in how they frame fragmentation. Our goal was to evaluate the differences in 1) framing the problem of fragmentation and 2) suggested solutions. We performed a content analysis of the strategic policy documents by coding text using the key fragmentation aspects - biological organization, land cover, and connectivity. Next, we categorized data either to species-oriented, pattern-oriented, or ecosystem service frames and suggested criteria to evaluate the quality of the framing. This method was useful to show the divergence in the framing of fragmentation as a problem between two policy domains. The results show that the pattern-oriented frame and mitigation solutions are the most prominent aspects, and also fragmentation is not well framed.

Why only the commissioning parents should undertake parental duties in surrogacy cases?

The introduction of in vitro fertilization (IVF) results in a separation of sex and reproduction which has generated enormous ethical debate (Lauritzen 1993). Surrogacy makes this situation more complicated by bringing a surrogate mother into reproduction. A surrogacy case may involve five individuals (in addition to the surrogate child). These are the commissioning couple, the gamete donors, and the surrogate mother. Hence, a surrogate child may have up to five parents, including biological parents, commissioning parents, and a gestational parent. The question is which of these people should undertake parental duty? In terms of the acquisition of parental duty, there are three accounts. They are the biological connection account, the causal account, and the consent account. In this article, I try to argue that only the commissioning parents should undertake the parental duty for the surrogate child based on the latter two accounts. I do not apply the biological connection account because the biological connection account fails to explain one’s parental duty, which I will show in the following sections.

Defining the economic scope for ecosystem-based fishery management

The emergence of ecosystem-based fisheries management (EBFM) has broadened the policy scope of fisheries management by accounting for the biological and ecological connectivity of fisheries. Less attention, however, has been given to the economic connectivity of fisheries. If fishers consider multiple fisheries when deciding where, when, and how much to fish, then management changes in one fishery can generate spillover impacts in other fisheries. Catch-share programs are a popular fisheries management framework that may be particularly prone to generating spillovers given that they typically change fishers' incentives and their subsequent actions. We use data from Alaska fisheries to examine spillovers from each of the main catch-share programs in Alaska. We evaluate changes in participation-a traditional indicator in fisheries economics-in both the catch-share and non-catch-share fisheries. Using network analysis, we also investigate whether catch-share programs change the economic connectivity of fisheries, which can have implications for the socioeconomic resilience and robustness of the ecosystem, and empirically identify the set of fisheries impacted by each Alaska catch-share program. We find that cross-fishery participation spillovers and changes in economic connectivity coincide with some, but not all, catch-share programs. Our findings suggest that economic connectivity and the potential for cross-fishery spillovers deserve serious consideration, especially when designing and evaluating EBFM policies.

Nitric oxide and hydrogen sulfide in plants: which comes first?

Nitric oxide (NO) is a signal molecule regarded as being involved in myriad functions in plants under physiological, pathogenic, and adverse environmental conditions. Hydrogen sulfide (H2S) has also recently been recognized as a new gasotransmitter with a diverse range of functions similar to those of NO. Depending on their respective concentrations, both these molecules act synergistically or antagonistically as signals or damage promoters in plants. Nevertheless, available evidence shows that the complex biological connections between NO and H2S involve multiple pathways and depend on the plant organ and species, as well as on experimental conditions. Cysteine-based redox switches are prone to reversible modification; proteomic and biochemical analyses have demonstrated that certain target proteins undergo post-translational modifications such as S-nitrosation, caused by NO, and persulfidation, caused by H2S, both of which affect functionality. This review provides a comprehensive update on NO and H2S in physiological processes (seed germination, root development, stomatal movement, leaf senescence, and fruit ripening) and under adverse environmental conditions. Existing data suggest that H2S acts upstream or downstream of the NO signaling cascade, depending on processes such as stomatal closure or in response to abiotic stress, respectively.

Application of ethanol-type fermentation in establishment of direct interspecies electron transfer: A practical engineering case study

A promising strategy for establishing direct interspecies electron transfer (DIET)-based syntrophic metabolism during anaerobic digestion (AD) is to stimulate the methanogenic communities with ethanol to rapidly produce biological electrical connections. In this study the strategy was further explored in an engineering-scale up-flow anaerobic sludge blanket (UASB) reactor treating bagasse wastes. The results demonstrated that, under the conditions employed, the ethanol-abundant acidogenic products from ethanol-type fermentation could stimulate the UASB reactor to form the aggregates with a higher conductivity (22.6 ± 0.6 uS/cm) than that in the laboratory-scale UASB reactor treating brewery wastes (8.1 ± 1.7 uS/cm), in which DIET was the primary working mode of interspecies electron exchange. Furthermore, these aggregates also presented a positive response with granular active carbon (GAC) to methanogenesis, suggesting that the DIET-based methanogenic communities were established. As a result, the engineering-scale UASB reactor was capable of maintaining stability in response to the environmental disturbance. Microbial community analysis revealed that specific and substantial enrichments of Petrimonas (21.8% of abundance) and Methanothrix species (64.8%) were detected in the aggregates. These results, and the known ability of Petrimonas species to transfer electrons to elemental sulfur, suggested that Petrimonas species might participate in DIET with Methanothrix species.

A child of two mothers: what about the father? Italian overview.

Surrogacy techniques allow for the birth of children who are then raised by parents who may have no genetic or biological connection with them at all. Italian legislation on medically assisted procreation bans such practices, under national criminal codes, and yet the intended parents’ ability to legally register children born abroad via surrogacy has not been affected by such legislation. Italian jurisprudence has acknowledged the parental status of same-sex couples, following the same path outlined by the European Court of Human Rights. The paper’s author elaborates on court decision n. 145/2018, from the Naples Court of Appeals, which has stated that surrogacy children may be connected to their intended parents merely by virtue of “mental” elements, based on affection, harmony and listening enjoyed by the child within the family setting. The author is critical of that view, in light of conflicting research findings on children growing up in same-sex families. In that regard, the author argues that even though homosexual couples may well turn out to be good parents, families made up of fathers and mothers still constitute the best scenario for the children, from a social perspective. It is however necessary for lawmakers to step in and better regulate an utterly sensitive area of law, one that might engender adverse repercussions on the children’s well-being, in terms of growth and psychological development, following their becoming part of homosexual families. (www.actabiomedica.it)

A Beginner’s Guide to the New Population Genomics of Homo sapiens

It is important to understand the science underlying philosophical debates. In particular, careful reflection is needed on the scientific study of the origins of Homo sapiens, the division of current human populations into ethnicities, populations, or races, and the potential impact of genomics on personalized medicine. Genomic approaches to the origins and divisions of our species are among the most multi-dimensional areas of contemporary science, combining mathematical modeling, computer science, medicine, bioethics, and philosophy of biology. The best evidence suggests that we are a young species, with a cradle in Africa. While prejudice, misunderstanding, and violence grow in many corners of the world, our best genomic science suggests a deep biological connection among all peoples.

Influence of hydrological connectivity of coastal wetland on the biological connectivity of macrobenthos in the Yellow River Estuary

Influence of hydrological connectivity of coastal wetland on the biological connectivity of macrobenthos in the Yellow River Estuary

Human-Disease Phenotype Map Derived from PheWAS across 38,682 Individuals

Phenome-wide association studies (PheWASs) have been a useful tool for testing associations between genetic variations and multiple complex traits or diagnoses. Linking PheWAS-based associations between phenotypes and a variant or a genomic region into a network provides a new way to investigate cross-phenotype associations, and it might broaden the understanding of genetic architecture that exists between diagnoses, genes, and pleiotropy. We created a network of associations from one of the largest PheWASs on electronic health record (EHR)-derived phenotypes across 38,682 unrelated samples from the Geisinger’s biobank; the samples were genotyped through the DiscovEHR project. We computed associations between 632,574 common variants and 541 diagnosis codes. Using these associations, we constructed a “disease-disease” network (DDN) wherein pairs of diseases were connected on the basis of shared associations with a given genetic variant. The DDN provides a landscape of intra-connections within the same disease classes, as well as inter-connections across disease classes. We identified clusters of diseases with known biological connections, such as autoimmune disorders (type 1 diabetes, rheumatoid arthritis, and multiple sclerosis) and cardiovascular disorders. Previously unreported relationships between multiple diseases were identified on the basis of genetic associations as well. The network approach applied in this study can be used to uncover interactions between diseases as a result of their shared, potentially pleiotropic SNPs. Additionally, this approach might advance clinical research and even clinical practice by accelerating our understanding of disease mechanisms on the basis of similar underlying genetic associations.

Subcellular connectomic analyses of energy networks in striated muscle

Mapping biological circuit connectivity has revolutionized our understanding of structure-function relationships. Although connectomic analyses have primarily focused on neural systems, electrical connectivity within muscle mitochondrial networks was recently demonstrated to provide a rapid mechanism for cellular energy distribution. However, tools to evaluate organelle connectivity with high spatial fidelity within single cells are currently lacking. Here, we developed a framework to quantitatively assess mitochondrial network connectivity and interactions with cellular sites of energy storage, utilization, and calcium cycling in cardiac, oxidative, and glycolytic muscle. We demonstrate that mitochondrial network configuration, individual mitochondrial size and shape, and the junctions connecting mitochondria within each network are consistent with the differing contraction demands of each muscle type. Moreover, mitochondria-lipid droplet interaction analyses suggest that individual mitochondria within networks may play specialized roles regarding energy distribution and calcium cycling within the cell and reveal the power of connectomic analyses of organelle interactions within single cells.

Application of modern non-medicine technologies to improve the state of the mucous vagina in patients of different age groups after plastic surgery for the rectocele

Background. The specific weight of genital prolapse among gynecological nosologies in Russia in the departments of operative gynecology ranges from 28 to 38.9% and in the structure of planned indications for surgical treatment ranks third after benign tumors and endometriosis.
 Aim. Development and implementation of new comprehensive rehabilitation programs for women with IIIII degree rectocele after surgical treatment.
 Methods. The article presents the treatment data for 100 women of different age groups with IIIII degree rectocele who, in the early postoperative period after plastic surgery for rectocell, used to improve the condition of the vaginal mucosa with general magnetotherapy, electromyostimulation with biological connection of the pelvic floor muscles, a special complex of physiotherapy exercises and intravaginal procedures of fractional microablative carbon dioxide laser therapy. The patients were divided into 2 groups comparable in terms of clinical and functional characteristics; within each group, depending on age, they were divided into
 2 subgroups: women of childbearing age were included in subgroup A, and peri- and menopausal women were included in subgroup B. To assess the condition of the vaginal mucosa and maturity of the vaginal epithelium after surgery in patients included in the study, a pH-metry of the vaginal discharge was performed and the Vaginal Health Index was determined.
 Results. As a result of the studies, it was found that a more pronounced therapeutic effect was obtained with the use of the complex, which includes a course of general magnetotherapy from the first day after surgery, as well as a month after surgery, a course of electromyostimulation with biological connection of the pelvic floor muscles and a special complex of physiotherapy exercises and 2 intravaginal procedures of fractional microablative carbon dioxide laser therapy.
 Conclusion. The obtained results indicate a pronounced therapeutic effect of the complex, which includes a course of General magnetotherapy from the first day after surgery, a course of electromyostimulation with biological connection of pelvic floor muscles and a special complex of physical therapy, as well as 2 intravaginal procedures of fractionation microablative therapy with a carbon dioxide laser 1 month after surgery..