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PubMedDate not supplied

The positive prognostic implications of crying during exam on threshold ROP.

INTRODUCTION: Most infants cry with lid speculum, scleral depression and indirect ophthalmoscopy. This simple observation, "did the infant cry?" during the initial 31-week ROP screening exam was prospectively studied. METHODS: From Fall 1989 through Summer 2003, all Alaskan infants with birthweight < or = 1500 grams were examined by RWA. After 1992, at the 31-week initial ROP screening, we recorded whether the infant was able to cry (cry), did not cry (quiet), or was intubated (vent) during indirect ophthalmoscopy with lid speculum and scleral depression. RESULTS: ROP was classified as to threshold in 873 infants. Infants who were able to cry during their 31-week GA screening exam were less likely to progress to threshold (Chi square 600, 2 = 36, p < .001). Using a logistic fit of Threshold, the increased risk of ROP in infants unable to cry persisted independent of gestational age or birthweight. CONCLUSIONS: Respiratory and neurologic co-morbidity may render those infants unable to cry during the first screening examination at increased risk to progress to threshold ROP.

Alaska↗
PubMedDate not supplied

Infant crying during aircraft descent.

The phenomenon of infant crying during aircraft descent is described, based on in-flight observations of 37 infant-mother pairs and mother interviews. The hallmark was crying during descent that was not alleviated by mothers' strategies that had been effective prior to descent. A significant relationship was found between bottle feeding and crying during descent; 18 (78%) of nonfeeding infants cried, compared with 4 (29%) of the bottle feeders. All infants with colds cried during descent, and descent crying always occurred more than 9 minutes after adults perceived the need to clear their ears. Only 4 of the 22 mothers (18%) with crying infants attributed the crying to ear pain, yet the findings support the explanation of otalgia due to inadequate middle ear ventilation. Developmental factors that put airborne infants at risk for otic barotrauma, educational implications, and directions for future research are discussed.

Aerospace Medicine↗
PubMed1982

Infant cry: a clue to diagnosis.

It has been postulated that the infant cry is a reflection of complex neurophysiologic functions and that analysis of the infant cry can be utilized to assess the infant's status. To test this hypothesis a model of cry production was developed utilizing a computer-based signal processing system that enabled the observer to relate closely the acoustic properties of the cry to the anatomic and physiologic characteristics of the infant producing the cry. The cries of 87 infants were analyzed following a standardized pain stimulus. Cry features were grouped into eight evaluative tests. Only seven of 55 apparently normal term infants had the abnormality "glottal instability" whereas 11 of 12 infants with bilirubin values in the 10 to 20 mg/100 ml range displayed the glottal instability pattern. An additional group of 17 infants with a variety of problems was studied; 14 of 17 displayed two or more abnormalities, and ten of 12 infants with respiratory disease had a unique pattern. Of particular interest was the finding of acoustical features suggestive of a constriction in the vocal tract in three infants; two of these infants were studied prospectively and subsequently were victims of sudden infant death syndrome and the third had a sibling with recurrent apnea. These results suggest that the analysis of the infant cry holds promise for detecting a number of abnormalities and may prove valuable as screening test to detect infants at risk for sudden infant death syndrome.

Acoustics↗
PubMed1980

[Spectrographic analysis of the crying of infants with laryngeal disorders].

Twenty induced pain cries from the same number of infants with laryngeal disorders (infectious laryngitis, laryngomalacia, recurrens paresis and subglottic stricture) have been analyzed by means of sound spectrography. For each cry 21 phonetical cry features have been evaluated. This cry material was then compared with 120 pain cries from healthy infants. In the pathological group a significant increase could be noted in the occurrence of the following cry attributes: second pause, abnormal melody types, instability of the fundamental frequency, biphonation, vibrato, half-voiced voice quality, and inspiratory stridor. Furthermore, a significant decrease could be noticed in the occurrence of voiceless voice quality and glottal roll. For the other cry parameters no significant differences have been observed. In the light of these findings, the neuropathognomic significance, which has been up to now attached to such spectrographic features as very high maximum pitch, biphonation, gliding, and abnormal melody type, should not be taken too strictly. Moreover, one may conclude that the actual state of cry spectrography does not permit us to regard such parameters as instability of the fundamental frequency and noise concentration as indicators of neurologic disorders. On the other hand, the features inspiratory stridor, vibrato and tonal pit seem, to be to a certain extent typical of peripheral diseases of the vocal tract.

Crying↗
PubMed1981

Analysis of cry features in newborns with differential fetal growth.

This article describes the relation between neonatal cry features and anthropometric indices of fetal growth. Ponderal indices were calculated to characterize 57 2-day-old infants as underweight for length, average weight for length, or overweight for length. Although no differences were found between the cry features of underweight and overweight infants, these infants at the extremes of the distribution of ponderal indices required more stimulation to elicit a pain cry and had a longer latency from the stimulus to cry onset and a higher fundamental frequency in the cry sound than infants with average ponderal indices. Whereas overweight infants cried for shorter amounts of time than average-weight infants, no differences were found in this sample between the underweight and average-weight infants. Test of differences in the variances of the groups paralleled the tests of mean differences. Because these cry features have been used to distinguish infants along a wide continuum of conditions where the functioning of an infant's central nervous system has been impaired or stressed, it was suggested that certain cry features may reflect the risk status of individual infants with anthropometric signs of both retarded and accelerated fetal growth.

Birth Weight↗
PubMed1994

Infant cries: physiology and assessment.

It is generally agreed that the infant communicates physiological and psychological distress to caregivers by crying. Crying that is atypical in amount, intensity, duration, or quality could signal a physiological problem before the problem becomes obvious in other ways. Thus, cry analysis could soon become an important tool in early identification of infants at risk. To better assess neonatal cry sounds, nurses need some background in cry physiology. This article describes the evolution of cry sound production, presents the contemporary theories on the physiology of cry sound production, explains how cries are acoustically categorized and analyzed, and highlights the implications for infant caregivers.

Acoustics↗
PubMed1995

[Why babies cry?].

Babies usually cry almost two hours a day, and about 15 per cent of them cry for more than three hours a day. Excessive crying is most common during the first three to four months of life, after which the frequency of crying decreases. For some parents their baby's crying is a problem, while other consider it a normal phenomenon and do not become irritated. Parental tolerance of infant crying is dependent not only on its frequency or intensity, but also on the psychological characteristics of the parents, and the amount of information, household help and social support that is available to them. Crying during the first few months of life is usually attributed to "colic", even if it is not known whether the infant suffers from gastrointestinal disturbance. The recommended treatments for excessive crying include medication, vocal, vestibular or tactile stimulation, hospital admission, and changes in parent-infant interaction.

Adult↗
PubMed2000

Distinct VH repertoires in primary and secondary B cell lymphocyte subsets in the preimmune repertoire of A/J mice: the CRI-A idiotype is preferentially associated with the HSA(low) B cell subset.

The anti-arsonate immune response of A/J mice is characterized by the occurrence of several recurrent idiotypes with a different temporal pattern of expression. The CRI-A idiotype is typically a memory idiotype since it appears late in the primary and dominates the secondary as well as subsequent immune responses. The CRI-C idiotype is present throughout the responses, including the primary one. Naive adult A/J mice treated repeatedly with anti-mu or anti-delta monoclonal antibodies exhibit a completely different balance of HSA(low) and HSA(high) B cell subsets and an opposite idiotype profile after immunization with p-azophenylarsonate coupled to hemocyanin. Anti-mu treatment leads to a striking enhancement of the HSA(low) cell subset associated with an earlier important synthesis of CRI-A(+) antibodies, while anti-delta treatment enhances significantly the HSA(high) compartment with a strong decrease of CRI-A and persistence of CRI-C1 antibodies. Semiquantitative PCR analysis reveals that the presence of CRI-A transcripts is associated with the HSA(low) compartment, while CRI-C transcripts are mainly associated with HSA(high) B cell subsets. This has been demonstrated with spleen cells of adult A/J mice treated with anti-mu or anti-delta antibodies and also with purified B cell subsets of unimmunized adult A/J mice and on neonatal spleen cells. It appears that the memory (CRI-A) idiotype is selected into the HSA(low) B cell subset before antigen arrival.

Animals↗
PubMed2006

Immunotherapy with CpG DNA conjugated with T-cell epitope peptide of an allergenic Cry j 2 protein is useful for control of allergic conditions in mice.

Immunotherapy using T-cell epitope peptides or CpG DNA conjugated with allergenic protein is useful, although the mechanisms of these therapies differ. However, the combination of CpG DNA and peptide, but not protein, had not been documented. Therefore, we investigated CpG DNA conjugated with peptide to obtain positive synergistic effects. In the first experiment, mice were vaccinated with a conjugate of CpG DNA and Cry j 2 T-cell epitope peptide p246-259 (CpG-peptide); a mixture of CpG DNA and peptide (CpG+peptide); peptide alone, or PBS alone, and immunized with Cry j 2. In the second experiment, mice were immunized with Cry j 2 and injected with CpG-peptide, CpG+peptide, peptide only, or PBS only. In both experiments, Cry j 2-specific IgE, IL-4, and IL-5 were significantly lower in mice given CpG-peptide, versus those given CpG+peptide, peptide alone, or PBS alone. However, IgG2a, IgG2b and IFN-gamma did not increase in mice injected with CpG-peptide. In the third experiment, CpG-peptide significantly attenuated nasal symptoms (sneezing and nasal rubbing) compared to CpG+peptide, peptide alone, or PBS alone. Mice were also injected with a conjugate of CpG DNA and Cry j 2 protein (CpG-Cry j 2) or CpG-peptide to compare prime responses. Mice vaccinated with CpG-Cry j 2 generated Cry j 2-specific IgG1, whereas those vaccinated with CpG-peptide did not produce IgG1. This study demonstrated, for the first time, that immunotherapy with CpG DNA conjugated with a T-cell peptide is useful in preventing and treating allergic conditions.

Animals↗
PubMed2000

Drosophila CRY is a deep brain circadian photoreceptor.

cry (cryptochrome) is an important clock gene, and recent data indicate that it encodes a critical circadian photoreceptor in Drosophila. A mutant allele, cry(b), inhibits circadian photoresponses. Restricting CRY expression to specific fly tissues shows that CRY expression is needed in a cell-autonomous fashion for oscillators present in different locations. CRY overexpression in brain pacemaker cells increases behavioral photosensitivity, and this restricted CRY expression also rescues all circadian defects of cry(b) behavior. As wild-type pacemaker neurons express CRY, the results indicate that they make a striking contribution to all aspects of behavioral circadian rhythms and are directly light responsive. These brain neurons therefore contain an identified deep brain photoreceptor, as well as the other circadian elements: a central pace-maker and a behavioral output system.

Animals↗
PubMed2000

Common antigenicity between Japanese cedar (Cryptomeria japonica) pollen and Japanese cypress (Chamaecyparis obtusa) pollen, II. Determination of the cross-reacting T-cell epitope of cry j 1 and cha o 1 in mice.

We have previously detected common antigenicity between Cry j 1 and Cha o 1 in B10.S mice. B10.S mice immunized with Cry j 1- or Cha o 1-generated T cells and antibodies reactive to both allergens. In the present study, we investigated the cross-reacting and Cry j 1-specific T-cell epitopes in B10.S mice. Lymph node cells from B10. S mice immunized with Cry j 1 recognized Cry j 1 p111-130, p211-230, and p310-330 as well as Cha o 1 p209-228. The existence of the cross-reacting T-cell epitope in Cry j 1 and Cha o 1 was confirmed by the response of newly established p211-230-specific and Cha o 1 p209-228-specific T-cell lines. The minimum peptide sequence (p213-224) of the cross-reacting T-cell epitope was identical in Cry j 1 and Cha o 1. These findings clearly demonstrate that common antigenicity at the T-cell level between Japanese cedar and cypress pollen allergens was caused by the existence of an identitical-cell epitope in Cry j 1 and Cha o 1.

Allergens↗
PubMed1995

Cry j 2, a major allergen of Japanese cedar pollen, shows polymethylgalacturonase activity.

We examined Cry j 2, a major allergen of Japanese cedar (Cryptomeria japonica) pollen, for polygalacturonase enzyme activity, since a nucleotide sequence of cDNA of Cry j 2 showed a significant homology with that of tomato polygalacturonase. Polygalacturonase is well known to depolymerize preferentially polygalacturonic acid (PGA) by hydrolysis. However, Cry j 2 did not act on PGA, but was found to depolymerize pectin and methylesterified PGA in a dose-dependent manner. The substrate specificity of Cry j 2 was different from that of polygalacturonase derived from Aspergillus niger. The depolymerizing activity of Cry j 2 reached a maximum at 50%-60% of methylesterification of PGA. In contrast, polygalacturonase showed its maximum activity of PGA, and the activity decreased as the degree of methylesterification increased. Interestingly, the pectin-depolymerizing activity of Cry j 2 was due to a hydrolysis, but not a lyase, activity which splits the glycosidic bonds by beta-elimination, since no unsaturated uronides were found by measurement of absorbance at 235 nm in the reaction mixture. The enzyme activity was markedly inhibited by anti-Cry j 2 antibodies. These results indicate that Cry j 2 probably has polymethylgalacturonase enzyme activity, as postulated by von Neukom in 1963, although existence of this activity has not yet been proven.

Allergens↗
PubMed1997

Unique regulation of crystal protein production in Bacillus thuringiensis subsp. yunnanensis is mediated by the cry protein-encoding 103-megadalton plasmid.

In sporulating cultures of Bacillus thuringiensis subsp. yunnanensis HD977, two cell types are observed: cells forming only spores and cells forming only crystals. Curing analysis suggested that the crystal proteins are plasmid encoded. Through plasmid transfer experiments, it was established that a 103-MDa plasmid is involved in the crystal production. Conjugal transfer of this plasmid to Cry- recipient cells of Bacillus thuringiensis subsp. kurstaki HD73-26 conferred the ability to produce crystals exclusively on asporogenous cells of the recipient, indicating that the 103-MDa plasmid mediates the unique regulation of Cry protein production. When the dipteran-specific cryIVB gene was introduced into wild-type (Cry+) and Cry- backgrounds of B. thuringiensis subsp. yunnanensis by phage CP51ts45-mediated transduction, similar to all other B. thuringiensis strains, irregular crystals of CryIVB protein were produced by spore-forming cells in both backgrounds. However, the synthesis of the bipyramidal inclusions of B. thuringiensis subsp. yunnanensis was still limited only to asporogenous cells of the transductant. Thus, it appears that the unique property of exclusive crystal formation in asporogenous cells of B. thuringiensis subsp. yunnanensis is associated with the crystal protein gene(s) per se or its cis acting elements. As the crystals in B. thuringiensis subsp. yunnanensis were formed only in asporogenous cells, attempts were made to find out whether crystal formation had any inhibitory effect on sporulation. It was observed that both Cry+ and Cry- strains of B. thuringiensis subsp. yunnanensis (HD977 and HD977-1, respectively) exhibited comparable sporulation efficiencies. In addition, the Cry- B. thuringiensis subsp. kurstaki host (HD73-26) and its Cry+ transconjugant (HD73-26-16), expressing the B. thuringiensis subsp. yunnanensis crystal protein, were also comparable in their sporulation efficiencies, indicating that production of the crystal proteins of B. thuringiensis subsp. yunnanensis does not affect the process of sporulation.

Bacillus thuringiensis↗
PubMed2000

Identification of a sequential B-cell epitope on major allergen (Cry j 1) of Japanese cedar (Cryptomeria japonica) pollen in mice.

BACKGROUND: Japanese cedar (Cryptomeria japonica; CJ) pollinosis is one of the most common allergic diseases in Japan. B cell epitopes on Cry j 1, a major allergen of CJ pollen, have been analyzed by the specific monoclonal antibodies to Cry j 1, and most of these epitopes may be conformational, but no previous report has addressed the analysis of sequential epitope mapping with synthetic peptides. The main purpose of the present study is to identify IgE and IgG B cell epitopes on Cry j 1 by using a synthetic peptide approach in mice. METHODS: We synthesized 35 overlapping peptides that cover the entire length of Cry j 1 and examined whether mouse IgE and IgG antibodies produced by immunization with Cry j 1 reacted to the Cry j 1 peptides. RESULTS AND CONCLUSION: We found that mouse IgE and IgG antibodies reacted strongly to Cry j 1 peptide No. 15 ((141)GVEPVHPQDGDALTLRTATN(160)), though those antibodies did not react with other peptides. IgE and IgG antibody binding to peptide No. 15 was completely inhibited by Cry j 1 and the peptide. To determine the minimum epitope in peptide No. 15, we conducted an ELISA inhibition test. IgE and IgG antibody binding to peptide No. 15 was inhibited by smaller peptides of this peptide. We found the core of the epitope to be (145)VHPQDGDA(152).

Allergens↗
PubMed1982

Treatment of excessive crying in a terminal cancer patient: a time-series analysis.

Spectral analysis was used to investigate the modification of the excessive crying (48% of waking time observed during baseline) of a terminal cancer patient. Initial assessment revealed a cyclic pattern of crying and dozing throughout the day and night. Intervention involved timeout from social stimulation contingent upon crying and differential social reinforcement for behaviors incompatible with crying. Analysis showed the gradual elimination of crying during the 15-day intervention. During the initial phase of intervention crying ceased to be emitted in the presence of hospital staff but was evoked by the presence of family members. As this pattern of crying diminished, the frequency and duration of family visits, as well as the frequency of positive patient utterances and conversation, increased. Clinical, ethical, and methodological issues surrounding the use of timeout are discussed.

Crying↗
PubMed1982

Cry analysis in infants with infectious and congenital disorders of the larynx.

Thirty induced pain cries from the same number of infants with infectious or congenital disorders of the larynx (infectious laryngitis, laryngomalacia, paresis of the recurrent nerve and subglottic stricture) have been analyzed by means of sound spectrography. For each cry 21 phonetic features have been evaluated. This cry material was then compared with 120 pain cries from healthy infants. In the pathological group a significant increase could be noted in the occurrence of the following cry attributes: second pause, abnormal melody types (rising, falling-rising, flat and no melody types), instability of the fundamental frequency, bi-phonation, vibrato, half-voiced voice quality, noise concentration, and inspiratory stridor. Furthermore, a significant decrease could be noticed in the occurrence of voiceless cries, falling and rising-falling melody types, and glottal roll. These findings show that such spectrographic features as very high maximum and minimum pitch, bi-phonation, gliding, and abnormal melody type occur more often in cries of infants with central nervous system involvement. Moreover, such parameters as instability of the fundamental frequency and noise concentration as indicators of neurologic disorders need further consideration. Except features of inspiratory stridor, this study revealed no really clear parameters typical of peripheral diseases of the vocal tract.

Central Nervous System↗
PubMed1987

The acoustic characteristics of the cry of an infant with unilateral vocal fold paralysis.

We have previously shown the acoustic similarity among well, full-term infants of the same post-conceptional and post-partum ages (Int. J. Pediat. Otorhinolaryngol., 10 (1985) 1-8). The objective of that research was to provide a template against which the cries of any given infant may be compared. This paper shows a more detailed analysis of both the normal infants' cries and the cry of an infant with a unilateral vocal fold paralysis. It is evident from this analysis that this infant's cry is not normal as it displays a spectrum not found in the cries of normal infants. What this research shows is that a technique is available with which it is possible to make a screening identification of those infants who merit further investigation. It is an objective of such research to determine if the cry of a given infant is abnormal in specifiable, and therefore diagnostic, ways. In this instance, we can conclude that the cry of this infant differs from that of one with a normal airway.

Crying↗
PubMed1994

The effect of nonnutritive sucking on oxygenation in healthy, crying full-term infants.

Crying in healthy, recently born infants has been associated with decreased oxygenation, which may prolong adjustment to extrauterine life. This research investigated the use of nonnutritive sucking (NNS) as an intervention to reduce crying and prevent any decreases in oxygenation that may occur in crying healthy term infants between 9 and 72 hours of life. Twenty-nine experimental group infants, who received a pacifier (NNS) immediately after crying was induced by a heelstick, had statistically significantly higher transcutaneous oxygen tensions (tcPO2S) compared with baseline values than 30 control (ONNS) infants who did not. Infants who received NNS also had higher tcPO2S after crying than infants who did not. NNS, which attenuates crying, may alleviate crying-induced oxygen decreases in healthy, transitional newborn infants.

Blood Gas Monitoring, Transcutaneous↗