Ns for future studies using B12 conjugates as pharmacological treatmentsOur 
studies have several implications. We show that in mice, the TC-mediated B12 transport system has an excess capacity that may be used for the transport of B12 conjugates. The capacity for uptake of B12 conjugates in humans may be even larger since in humans only around 10 of the circulating TC is saturated with B12 [21], while in mice, the saturation degree is 50 (Table 2). Excess B12 is not evenly distributed in the mouse tissues, which has also been observed in humans [22]. Thus, the use of the B12 transport system for the delivery of drugs may prove most efficient if targeted to tissues that accumulate the vitamin such as the kidney and the liver. After B12 loading, alterations in the expression of B12-related genes and circulating tHCY were observed. This may have implications for treatment with B12 conjugates that dissociate to active B12 1326631 and conjugate within the cell. Our study also indicates that B12 conjugates compete with theAcknowledgmentsWe acknowledge Jette Fisker Pedersen for excellent technical assistance and Boe S. Soerensen for fruitful discussions about PCR, both at the Department of Clinical Biochemistry; Aarhus University Hospital; Denmark.Author ContributionsConceived and designed the experiments: DLL EM HB EN. Performed the experiments: DLL EM HB. Analyzed the data: DLL EM HB EN. Contributed reagents/materials/analysis tools: DLL EM HB EN. Wrote the paper: DLL EM HB EN.
The most obvious way by which environmental variation may influence body condition and fecundity is via nutritional effects resulting from variability in food type availability. In general terms, diet effect can be classified as either 76932-56-4 chemical information quantitative (i.e. food availability) or qualitative (i.e. food composition). The quantitative effects are evident since animals obtain energy and other nutritional requirements from food. Thus, under a natural range of conditions there is a positive correlation between food availability and body condition or fecundity. Qualitative effects often are divided into two categories: namely nutritional deficiencies and inhibitory metabolites. The balance between energy intake and expenditure is necessary to the survival and reproductive success of animals [1,2]. This balance depends on the interplay between matter intake, digestion and allocation of BIBS39 custom synthesis acquired energy to various functions such as maintenance, growth and reproduction [3]. Animals obtain energy and nutrients from food, so diet can be considered a key factor that potentially affects all life-history components [4,5]. Experimental modifications of animal diets have played a key role in the study of how organisms adjust their energy allocation [6,7].The amount and quality of nutrients intake 1326631 by organisms have a strong impact on life-history traits, such as disease vulnerability, fertility, reproduction, longevity and stress resistance [8,9,10]. Studies concern with the impact of nutrition often assesses the physiological and morphological responses of individuals exposed to different quality and amount of nutrients. Many organisms face a challenge of meeting their optional nutritional requirement for somatic and reproductive growth under natural conditions [11]. During development, body tissues constantly require a specific quantity and proportion of nutrients in order to attain optimal growth and performance [12]. Deficiency or imbalance of fat, carbohydrate or protein can affect character.Ns for future studies using B12 conjugates as pharmacological treatmentsOur studies have several implications. We show that in mice, the TC-mediated B12 transport system has an excess capacity that may be used for the transport of B12 conjugates. The capacity for uptake of B12 conjugates in humans may be even larger since in humans only around 10 of the circulating TC is saturated with B12 [21], while in mice, the saturation degree is 50 (Table 2). Excess B12 is not evenly distributed in the mouse tissues, which has also been observed in humans [22]. Thus, the use of the B12 transport system for the delivery of drugs may prove most efficient if targeted to tissues that accumulate the vitamin such as the kidney and the liver. After B12 loading, alterations in the expression of B12-related genes and circulating tHCY were observed. This may have implications for treatment with B12 conjugates that dissociate to active B12 1326631 and conjugate within the cell. Our study also indicates that B12 conjugates compete with theAcknowledgmentsWe acknowledge Jette Fisker Pedersen for excellent technical assistance and Boe S. Soerensen for fruitful discussions about PCR, both at the Department of Clinical 
Biochemistry; Aarhus University Hospital; Denmark.Author ContributionsConceived and designed the experiments: DLL EM HB EN. Performed the experiments: DLL EM HB. Analyzed the data: DLL EM HB EN. Contributed reagents/materials/analysis tools: DLL EM HB EN. Wrote the paper: DLL EM HB EN.
The most obvious way by which environmental variation may influence body condition and fecundity is via nutritional effects resulting from variability in food type availability. In general terms, diet effect can be classified as either quantitative (i.e. food availability) or qualitative (i.e. food composition). The quantitative effects are evident since animals obtain energy and other nutritional requirements from food. Thus, under a natural range of conditions there is a positive correlation between food availability and body condition or fecundity. Qualitative effects often are divided into two categories: namely nutritional deficiencies and inhibitory metabolites. The balance between energy intake and expenditure is necessary to the survival and reproductive success of animals [1,2]. This balance depends on the interplay between matter intake, digestion and allocation of acquired energy to various functions such as maintenance, growth and reproduction [3]. Animals obtain energy and nutrients from food, so diet can be considered a key factor that potentially affects all life-history components [4,5]. Experimental modifications of animal diets have played a key role in the study of how organisms adjust their energy allocation [6,7].The amount and quality of nutrients intake 1326631 by organisms have a strong impact on life-history traits, such as disease vulnerability, fertility, reproduction, longevity and stress resistance [8,9,10]. Studies concern with the impact of nutrition often assesses the physiological and morphological responses of individuals exposed to different quality and amount of nutrients. Many organisms face a challenge of meeting their optional nutritional requirement for somatic and reproductive growth under natural conditions [11]. During development, body tissues constantly require a specific quantity and proportion of nutrients in order to attain optimal growth and performance [12]. Deficiency or imbalance of fat, carbohydrate or protein can affect character.
