Nutritional and functional roles of ß-mannanase on intestinal health and growth of newly weaned pigs fed two different types of feeds.

This study aimed to investigate the nutritional and functional roles of ß-mannanase on the intestinal health and growth of newly weaned pigs fed a typical or low-cost formulated feeds (LCF). Twenty-four newly weaned pigs at 6.2 kg ±â€…0.4 body weight (BW) were allotted to three dietary treatments based on a randomized complete block design with sex and initial BW as blocks. Three dietary treatments are as follows: Control, typical nursery feeds including animal protein supplements and enzyme-treated soybean meal; LCF with increased amounts of soybean meal, decreased amounts of animal protein supplements, and no enzyme-treated soybean meal; LCF+, low-cost formulated feed with ß-mannanase at 100 g/t, providing 800 thermostable ß-mannanase unit (TMU) per kg of feed. Pigs were fed based on a three-phase feeding program for a total of 37 d. On day 37 of feeding, all pigs were euthanized and the gastrointestinal tract was removed for sample collection to analyze intestinal health parameters, mucosa-associated microbiota, and gene expression of tight junction proteins. Pigs fed LCF increased (P < 0.05) the relative abundance of Proteobacteria and Helicobacter in the jejunal mucosa, tended to decrease (P = 0.097; P = 0.098) the concentration of malondialdehyde (MDA) and the expression of zona occluden 1 (ZO-1) gene in the jejunum, tended to decrease average daily gain (ADG; P = 0.084) and final BW (P = 0.090), and decreased (P < 0.05) average daily feed intake. Pigs fed LCF + tended to decrease (P = 0.088) digesta viscosity, decreased (P < 0.05) the relative abundance of Helicobacter, and increased (P < 0.05) Lactobacillus in the jejunal mucosa compared to LCF. Additionally, LCF + tended to increase final BW (P = 0.059) and ADG (P = 0.054), increased (P < 0.05) gain to feed ratio (G:F), and reduced (P < 0.05) fecal score compared to LCF. LCF with decreased amounts of animal protein supplements and increased amounts of soybean meal had negative effects on the composition of the mucosa-associated microbiota, intestinal integrity, and growth performance of nursery pigs. Beta-mannanase supplementation to LCF decreased digesta viscosity, increased the relative abundance of potentially health-benefitting microbiota such as Lactobacillus, and improved growth and fecal score, thus reflecting its efficacy in low-cost formulated feeds with increased amounts of soybean meal.

Immediately following weaning, pigs are exposed to various stressors associated with environmental, social, and dietary shifts that can result in depressed growth, high incidence of diarrhea, and increases in mortality. Major plant-based feedstuffs such as soybean meal contain anti-nutritional compounds including nonstarch polysaccharides causing negative impacts on the intestinal health and growth of nursery pigs due to the immaturity of the intestine and intestinal immune system. ß-mannanase hydrolyzes ß-mannans, nonstarch polysaccharides, resulting in elimination of anti-nutritional properties and the release of mannooligosaccharides. The aim of this study was to investigate the nutritional and functional roles of ß-mannanase on intestinal health and growth of newly weaned pigs fed a low-cost formulated feed (LCF). This study showed that increased amounts of soybean meal in LCF increased pathogenic bacteria associated to the jejunal mucosa of nursery pigs, impaired intestinal integrity, and decreased growth. Supplementation of ß-mannanase to LCF decreased digesta viscosity, increased Lactobacillus in the jejunal mucosa, reduced diarrhea, and improved growth performance of nursery pigs.

"Not just rebellious, it's revolutionary": Do-it-yourself hormone replacement therapy as Liberatory Harm Reduction.

For some transgender people, hormone replacement therapy (HRT) is "an ontological necessity for a livable life" (Fondén, 2020, p. 29). Some trans people engage in do-it-yourself (DIY) HRT (aka "DIYers") because of care barriers, including medication costs, difficulty accessing healthcare providers, and mistrust in professionalized medical systems. Although DIY HRT is often framed as highly risky, we analyzed in-depth interviews with 36 U.S. DIYers to understand how they themselves perceived their goals, challenges, and risk mitigation using the Liberatory Harm Reduction and lay expertise frameworks. Participants emphasized experiences of transphobia within medical spaces. In contrast, participants characterized DIY HRT as a community-driven, accessible, and empowering practice. Through self-organized online forums and mutual aid, DIYers constructed adaptive health-promoting practices that challenge biomedical conceptualizations of risk and affirm trans agency.

Effects of dietary xylanase supplementation on growth performance, intestinal health, and immune response of nursery pigs fed diets with reduced metabolizable energy.

This study aimed to investigate the effects of xylanase on growth performance and intestinal health of nursery pigs fed diets with reduced metabolizable energy (ME). One hundred ninety-two pigs at 8.7 kg ±â€…0.7 body weight (BW) after 7 d of weaning were allotted in a randomized complete block design with initial BW and sex as blocks. Eight dietary treatments consisted of 5 ME levels (3,400, 3,375, 3,350, 3,325, and 3,300 kcal ME/kg) below the NRC (2012) requirement and 4 levels of xylanase (0, 1,200, 2,400, and 3,600 XU/kg) to a diet with 3,300 kcal ME/kg. All pigs received their respective treatments for 35 d in 2 phases, pre-starter (14 d) and starter (21 d). On day 35, eight pigs in 3,400 kcal/kg (CON), 3,300 kcal/kg (LE), and 3,300 kcal/kg + 3,600 XU xylanase/kg (LEX) were euthanized to collect jejunal tissues and digesta for the evaluation of mucosa-associated microbiota, intestinal immune response, oxidative stress status, intestinal morphology, crypt cell proliferation, and digesta viscosity as well as ileal digesta to measure apparent ileal digestibility. Data were analyzed using the MIXED procedure on SAS 9.4. The LE increased (P < 0.05) jejunal digesta viscosity, tended to have decreased (P = 0.053) relative abundance of Prevotella, and tended to increase (P = 0.055) Lactobacillus. The LE also increased (P < 0.05) the concentration of protein carbonyl whereas malondialdehyde, villus height (VH), villus height to crypt depth ratio (VH:CD), apparent ileal digestibility (AID) of nutrients, and finally average daily feed intake were decreased (P < 0.05). The LE did not affect average daily gain (ADG). The LEX decreased (P < 0.05) digesta viscosity, increased (P < 0.05) the relative abundance of Prevotella, decreased (P < 0.05) Helicobacter, decreased (P < 0.05) the concentration of protein carbonyl, tended to increase (P = 0.065) VH, and decreased (P < 0.05) VH:CD and crypt cell proliferation. Moreover, LEX increased (P < 0.05) the AID of dry matter and gross energy and tended to increase (P = 0.099; P = 0.076) AID of crude protein, and ether extract. The LEX did not affect ADG but did tend to decrease (P = 0.070) fecal score during the starter phase. Overall, reducing ME negatively affected intestinal health parameters and nutrient digestibility without affecting growth. Supplementation of xylanase mitigated some of the negative effects observed by ME reduction on intestinal health and digestibility of nutrients without affecting growth.

Dietary inclusion of fats in the feeds of nursery pigs allows nutritionists to increase the energy density of the feed. Some researchers believe the value of adding fat in nursery feeds goes beyond meeting the energy specification of the feed but rather as a supply of fatty acids that can regulate various bodily processes. Volatility in feedstuff prices has resulted in increased inclusion of coproducts rich in nonstarch polysaccharides (NSP) and a decrease in dietary fat in nursery pig diets in an effort to boost economic sustainability with minimal compromise of growth. Common feedstuffs of plant origin possess an inherent amount of NSP that can elicit negative effects on the digesta viscosity, intestinal microbiota, and digestibility of nutrients. Supplemental enzymes such as xylanase target specific NSP components within the feed to alleviate some of these negative effects and may release otherwise indigestible nutrients for absorption. The aim of this study was to investigate the impact of reducing metabolizable energy (ME) of the feed up to 100 kcal ME/kg on growth performance, intestinal health, immune status, and the composition of the mucosa-associated microbiota as well as the ability of xylanase to mediate the negative effects imposed by a reduction in supplemental fat to lower ME.

How Individuals Use Metaphors to Negotiate Fertility Treatment Decision-Making with Their Romantic Partners.

Fertility problems, or the inability to conceive or carry a pregnancy to term for a period of over 12 months while engaging in unprotected sex, affects 12% of women and 9% of men of childbearing age. To answer calls for more research about individuals' fertility decision-making (DM) with their partners, we conducted in-depth, semi-structured interviews with 53 individuals who have experienced fertility decision-making with a romantic partner at some point in their lives. Our findings indicate at least three primary ways individuals and their partners navigated their decision-making communication in their infertility "journeys:" (1) the Driver-Navigator, (2) Driver-Passenger, and (3) Driver-Backseat Driver approaches. All decision-making communication approaches were viewed by individuals as collaborative (i.e. shared), but varied in degrees of "togetherness" (high, moderate, low) in how they communicated with each other about treatment decisions. Implications include helping couples and their clinicians to be aware of their DM approach(es) and offering alternative DM approaches based on understanding how and why certain approaches may (not) be effective in addressing goals, needs, and identities.

Feasibility, acceptability, and outcomes of a pilot intervention facilitating communication about family building between patients with inherited cancer risk and their partners.

Objective: This study reports the feasibility, acceptability, and outcomes of a longitudinal, communication pilot intervention for patients with inherited cancer risk and their partners. Methods: Couples were recruited through social media and snowball sampling. At Time 1 and 2, 15 couples completed a structured discussion task about family building concerns and decisions, followed by an online post-discussion questionnaire and dyadic interview to provide feedback about the experience. Interview data were analyzed to assess outcomes using applied thematic analysis. Results: Participants reported the intervention created an opportunity for honest disclosure of family building goals and concerns. Participants also stated the structured nature of the discussion task was useful and did not cause additional stress. The intervention ultimately aided at-risk patients and their partners to realize their concordant concerns, discover/confront discordant concerns, and mutually agree upon next steps. Conclusions: This pilot intervention is feasible and acceptable. Furthermore, it offers a framework to facilitate effective communication about family building between patients with inherited cancer risk and their partners. Innovation: This intervention is the first conversational tool designed for at-risk patients and their partners.

Friend or Foe? Impacts of Dietary Xylans, Xylooligosaccharides, and Xylanases on Intestinal Health and Growth Performance of Monogastric Animals.

This paper discusses the structural difference and role of xylan, procedures involved in the production of xylooligosaccharides (XOS), and their implementation into animal feeds. Xylan is non-starch polysaccharides that share a ß-(1-4)-linked xylopyranose backbone as a common feature. Due to the myriad of residues that can be substituted on the polymers within the xylan family, more anti-nutritional factors are associated with certain types of xylan than others. XOS are sugar oligomers extracted from xylan-containing lignocellulosic materials, such as crop residues, wood, and herbaceous biomass, that possess prebiotic effects. XOS can also be produced in the intestine of monogastric animals to some extent when exogenous enzymes, such as xylanase, are added to the feed. Xylanase supplementation is a common practice within both swine and poultry production to reduce intestinal viscosity and improve digestive utilization of nutrients. The efficacy of xylanase supplementation varies widely due a number of factors, one of which being the presence of xylanase inhibitors present in common feedstuffs. The use of prebiotics in animal feeding is gaining popularity as producers look to accelerate growth rate, enhance intestinal health, and improve other production parameters in an attempt to provide a safe and sustainable food product. Available research on the impact of xylan, XOS, as well as xylanase on the growth and health of swine and poultry, is also summarized. The response to xylanase supplementation in swine and poultry feeds is highly variable and whether the benefits are a result of nutrient release from NSP, reduction in digesta viscosity, production of short chain xylooligosaccharides or a combination of these is still in question. XOS supplementation seems to benefit both swine and poultry at various stages of production, as well as varying levels of XOS purity and degree of polymerization; however, further research is needed to elucidate the ideal dosage, purity, and degree of polymerization needed to confer benefits on intestinal health and performance in each respective species.