The release of peptides and glycopeptides by the action of heat on cow's milk

1970 ◽  
Vol 37 (3) ◽  
pp. 397-405 ◽  
Author(s):  
E. J. Hindle ◽  
J. V. Wheelock

SummaryThe release, as a result of heat treatment on cow's milk, of peptides and glycopeptides which are soluble in the 12% trichloroacetic acid (TCA) filtrate of the milk has been studied. The results showed that the amount of peptides released increased with temperature and duration of the heat treatment. There were differences between milks in their response to a given heat treatment. Glycopeptides were released at temperatures as low as 50 °C but not at 37 °C. A comparison was made of the glycopeptides released by heat treatment and of those released from κ-casein by the action of rennin on the milk. This showed that N-acetyl neuraminic acid, D-galactose and 2-acetamido-2-deoxy-D-galactose were invariably present in both groups of glycopeptides. D-Mannose was also present in the glycopeptides released by heat but was detected on the glycopeptides released by rennin in only one of 6 experiments. It is suggested that glycopeptides released by heat may be derived from κ-casein but that a definite conclusion cannot be reached at present because of lack of information on the carbohydrates attached to other milk proteins.

2009 ◽  
Vol 39 (6) ◽  
pp. 918-925 ◽  
Author(s):  
Y. Morisawa ◽  
A. Kitamura ◽  
T. Ujihara ◽  
N. Zushi ◽  
K. Kuzume ◽  
...  

1970 ◽  
Vol 5 (4) ◽  
pp. 51-60
Author(s):  
José Henrique Pereira Pinto ◽  
Renan Lemos de Toledo ◽  
William do Prado Franquelo

RESUMOIntrodução: Alergia à Proteína do Leite de Vaca (APLV) é uma doença inflamatória secundária à reação imunológica contra uma ou mais proteínas do leite de vaca (LV) que afeta principalmente a faixa pediátrica. A real prevalência é discutida em muitos estudos. As manifestações clínicas dependem do tipo da resposta imunológica, ser IgE mediada ou não. Os sintomas se iniciam por volta dos 06 meses de vida e na maioria dos casos, esse processo alérgico regride, com o paciente desenvolvendo tolerância até a adolescência. Casuística: Relata-se um caso de um paciente do sexo masculino, apresentando desde os 6 meses de idade de anafilaxia e broncoespasmo. Nesta época foi levado em hospitais e ambulatórios sendo diagnosticado e tratado como asma apenas, porém sem sucesso. Aos 18 anos, em consulta com especialista foi diagnosticado com APLV, apesar da dieta de exclusão, apresentou diversas reações anafiláticas, devido a ingestão acidental do alérgeno. Discussão: O paciente iniciou os primeiros sintomas quando houve contato com LV e apresentou teste laboratorial com valores compatíveis a patologia. Segundo a literatura a prevalência de APLV cai para menos de 1% aos 6 anos de vida e está persistência pode estar associada a múltiplos fatores, no caso relatado, o paciente não apresentou tolerância até o presente momento. Conclusão: APLV é uma doença usualmente de criança em que, se estas não adquirirem tolerância, complicações podem perdurar indefinidamente. O Diagnóstico precoce e o manejo adequado desta condição, revela grande importância na qualidade de vida e na prevenção de anafilaxia.Palavras chave: Alergia, Proteína do leite de vaca, Anafilaxia. ABSTRACT Introduction: Allergy to cow's milk (CMPA) is an inflammatory disease Introduction: Allergy to cow's milk (CMPA) is an inflammatory disease secondary to immune response against one or more cow's milk proteins (LV) which primarily affects pediatric patients. The current prevalence is discussed in many studies. The clinical manifestations depend on the type of immune response, being IgE mediated or not. Symptoms start at about 06 months of life and in most cases, the allergic process subsides, and the patient develops tolerance through adolescence. Case Report: We report the case of a male patient, who was presenting, since his 06 months of age, anaphylaxis and bronchospasm. At that time he was taken into hospitals and clinics being diagnosed and treated as asthma, but without success. At 18, in consultation with expert was diagnosed with CMPA, and despite the exclusion diet, presented several anaphylactic reactions due to accidental ingestion of the allergen. Discussion: The patient began the first symptoms when there was contact with LV and presented laboratory test values compatible with the pathology. According to the literature the prevalence of CMPA drops to less than 1% to 6 years of life and this persistence can be associated with multiple factors, in our case, the patient did not develop tolerance to date. Conclusion: CMPA is usually a child disease but ,if they do not acquire tolerance, complications can last indefinitely. Early diagnosis and appropriate management of this condition, reveals a great deal on quality of life and prevention of anaphylaxis. Keywords: Allergy, Cow’s milk protein, Anaphylaxis. 


PEDIATRICS ◽  
1983 ◽  
Vol 71 (2) ◽  
pp. 299-300
Author(s):  
LASSE LOTHE ◽  
TOR LINDBERG ◽  
IRÉNE JAKOBSSON

In Reply.— We fully agree with LeBlanc that there was no significant improvement when infants with colic were given a soy protein-based formula. As pointed out in the "Discussion," as many as 53% of the infants showed an adverse reaction to soy (corresponding figure for cow's milk formula was 71%). We also emphasized that these figures must be interpreted with caution. In fact, soy protein-based formula was a bad choice as placebo. A placebo substance should be a substance of no importance as an allergen in infancy and soy protein has been shown to be as antigenic as cow's milk proteins (Eastham EJ, et al: J Pediatr 1978;93:561).


2021 ◽  
pp. 51-55
Author(s):  
Baranov S.A. ◽  
◽  
Shevlyakov V.V. ◽  
Sychyk S.I. ◽  
Filonyuk V.A. ◽  
...  

The purpose of the work was to establish in a model experiment the allergenic activity and danger of the extracts obtained from the dust of dry products of cow's milk processing (DPMP), containing complexes of soluble whey (WMP) or casein milk proteins (CMP), as a stage of hygienic regulation of the content of dust DPMP in the air of the working area. Experiments on albino guinea pigs sensitized by the intradermal injection of standard doses of WMP and СМР solutions into the ear revealed the development of severe allergic reactions in the animals of the experimental groups with the prevalence of mixed mechanisms of immediate anaphylactic and delayed cell-mediated types. According to the criteria for the classification of industrial allergens, the WMP and СМР complexes have a strong allergenic activity and are differentiated to the 1-st class of allergenic hazard, which determines the classification of the DPMP dust containing them as extremely dangerous industrial allergens. This is confirmed by the established high levels of indicators of allergic-diagnostic reactions in vivo and in vitro when testing sensitized WMP and СМР animals with a solution of skim milk powder dust, indicating the presence of antigenic determinants of whey and casein milk proteins in it and a real ability to form cross-allergic reactions in the body of workers to dust from all dry milk processing products containing these proteins.


Author(s):  
Гайдучик Г. А.

The purpose of the work was to evaluate the effectiveness of the elimination diet in infants with gastrointestinal manifestations of food allergy.Patients and methods. 84 children aged 2 months to 1 year were examined with gastrointestinal food allergy to cow's milk proteins. All children were prescribed an elimination diet with the exclusion of cow's milk proteins. An assessment was made of the regression of gastrointestinal symptoms on day 3, 7 and 14 of diet therapy and the determination of the concentration of eosinophilic cationic protein in serum. The general-clinical, immunological, allergological and statistical methods of research were used.Results. The purpose of the elimination diet with the exclusion of cow's milk proteins for nursing mothers and the use of mixtures with extensive hydrolysis of protein in the case of artificial feeding leads to a complete regression of gastrointestinal and skin symptoms in all examined children on the 14th day of diet therapy, which is further confirmed by the normalization of the concentration of eosinophilic cationic serum protein in diet therapy. Conclusions. Elimination of cow's milk proteins in infants with gastrointestinal food allergy results in complete regression of gastrointestinal and skin symptoms on day 14 of diet therapy, and determination of the concentration of eosinophilic cationic protein in serum can be used as an additional criterion for the effectiveness of diet therapy.


2013 ◽  
Vol 3 (S3) ◽  
Author(s):  
C Muñoz Archidona ◽  
JF Viada Bris ◽  
SJ Quevedo Teruel ◽  
S Fernández Fernández ◽  
AI Rayo Fernández ◽  
...  

PEDIATRICS ◽  
1964 ◽  
Vol 33 (2) ◽  
pp. 308-309
Author(s):  
ARMOND S. GOLDMAN ◽  
D. W. ANDERSON ◽  
S. R. HALPERN ◽  
W. A. SELLARS

In the study of oral challenge of allergic patients with milk, the inclusion of patients with milk sugar intolerance was minimized by using lactose-free purified milk proteins for confirmatory oral challenge tests. These purified milk proteins did contain sucrose, but the possibility of sucrose intolerance was excluded because the soybean milk used during the asymptomatic periods of milk elimination also contained sucrose. We agree with Dr. Ingall that in the absence of oral challenge with purified milk proteins, it is difficult to distinguish between milk protein hypersensitivity and lactose intolerance in those patients exhibiting solely gastrointestinal reactions when challenged with lactose-containing cow's milk.


PEDIATRICS ◽  
1983 ◽  
Vol 71 (2) ◽  
pp. 268-271 ◽  
Author(s):  
Iréne Jakobsson ◽  
Tor Lindberg

Sixty-six mothers of 66 breast-fed infants with infantile colic were put on a diet free from cow's milk. The colic disappeared in 35 infants; it reappeared on at least two challenges (cow's milk to mother) in 23 infants (35%). A double-blind crossover trial with cow's milk whey protein was performed in 16 of these 23 mothers and infants. Six infants had to be taken out of the study for various reasons; of the remaining ten infants, nine reacted with colic after their mothers' intake of whey protein-containing capsules. Sequential analysis showed a high correlation between infantile colic in breast-fed infants and their mothers' consumption of cow's milk protein. A diet free of cow's milk is suggested for the mothers as a first trial of treatment of infantile colic in breast-fed infants.


2019 ◽  
Vol 143 (2) ◽  
pp. AB276
Author(s):  
Laura Feijoo Paz ◽  
Ruth Maria Barranco ◽  
Jesus F. Fernandez Crespo ◽  
Maria Del Carmen Dieguez

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